02 MAA - Si [PDF]

Zitiervorschau

2 Steam Turbine Design Type E30-16-1x6,3

s

© Siemens AG · Power Generation (PG)

65_0.0_ Inhalt Kap.2 _allgemein_E+D+++ . doc.09 07

Content

Inhalt

Turboset overviews

1.

Übersichten DT-Anlage

Technical Data

2.

Technische Daten

Description of Turbine Components

3

Beschreibung der Turbinenbauteile

Turbine valves

4.

Turbinenventile

Instrumentation

5.

Messungen am Turbosatz

Valve controls

7.

Steuerungen

Inspection work, overview

8.

Instandhaltung, Übersicht

Annex original system diagrams Heat flow diagrams

A.

Anhang Originalschaltpläne Wärmeschaltplan

i

s

Fig. 1.1

65-E_101_3D-Ges.ansicht_hoch_yazd . ppt 01 06

© Siemens AG • Power Generation (PG)

Steam Turbine with Auxiliary Systems, E-Series with high Arrangement

65E_201_Systemplan, Mapna22 0209.jä

s

© Siemens AG • Power Generation (PG)

MAC45 AA151

MAC45 AA051 LBA90

T

LBA21

MAL71 MAL09

MAA12 AA151 S.pres. upstream HP blading MAA50 CP101 T HP casing top

P

T

T

MAW82

T stationary blade ring (T Le-0) MAC10CT111-113

P

T

MAW22

MAL15

T LP casing rear

T

MAA50 CT151

T HP INR CSG FR 90% MAA50CT111-113

LBA20

MAC

MAA

48x2.6

T

MAM10

MAA21 AA051

T HP casing bottom MAA50CT152

MAA22 AA151

48x2.6

MAL15

MAG

168x4.5

T

MAC10CT171-173

MAL11

MAW21

MAW81

MAM10

MAA11 AA051

MAL64 MAL51

P

MAL50

MAC01 AA001

MAC10CP101-103 P LP steam ahead LP blading

MAL10 33,7x2,6

LBA22 T

MAL12

MAN43

MAC01 AA002

(LCA)

Fig. 1.4 2.1

System Diagram of Steam Turbine, E-Series, Mapna 22

Register 3.1 Design Data

Extract

TAB03_1.DOC

Fig. 2.1

Steam Turbines Technical Data

Design Data Turbine Rating, Rating Plate Data

Rating Nameplate rating (IEC No. 45;1st edition 91-05 paragraph 3.5)

159 MW

Maximum capability (IEC No. 45;1st edition 91-05 paragraph 3.5)

183 MW

Definitions: Nameplate rating to IEC No. 45; 1st edition 91-05, paragraph 3.5 Warranted maximum continuous output at (standard) conditions (rated values, standard cycle layout, rated steam conditions, rated steam flow) specified in warranty. Maximum overload capability (IEC No. 45; 1st edition 91-05 paragraph 3.5) The maximum power output that the unit can produce with the goveming (control) valves fully open, and with the thermal conditions specified for overload, e.g. with final feed water heater bypassed, or with increased initial steam pressure. For maximum overload capability the maximum permissible values for long-term operation are valid.

STEAM TURBINE Order-No.:

10796

Year of Manufacture:

Steam Pressure:

90 bar

Steam Temperature:

520 C

Speed:

50 s-1

Rated Capacity:

159 MW

Exhaust Steam Pressure: 0.14 bar Siemens AG - Power Generation

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2006 - All Rights Reserved

SIEMENS

Siemens AG

MA &MDA

1.1.3-00125-10796/1 0806E

Power Generation

Fig. 2.2

Steam Turbines Technical Data

Design data Turbine: Types, Numbers of Stages and Flows, Moments of Inertia, Weights

Turbine, Types One-casing condensing turbine for double pressure combined cycle

AMA

E turbine: Single-flow HP turbine with 24 cylindrical drumstages Single-flow LP turbine with 7 reaction stages including 4 cylindrical drumstages and 3 standard stages

AMAA AMAC

Type E30-16-1x6,3

Moments of Inertia AMAA50 HB001 / AMAC10 HB001

9675 kg m2

E Turbine, completely assembled

AMAA50 HA001 / AMAC10 HA001

175.0 Mg

E-Turbine, top half outer casing

AMAA50 HA001 / AMAC10 HA001

25.0 Mg

E Turbine, top half inner casing with diffusers

AMAA50 HA001 / AMAC10 HA001

9 Mg

E-Turbine, top half stationary blade carrier - Generator End, stages 1 to 5

AMAC10 HA001

5.2 Mg

E-Turbine, top half stationary blade ring - Generator End, stage 6 to 7

AMAC10 HA001

4.1 Mg

E Turbine, rotor complete with blading

AMAA50 HB001 / AMAC10 HB001

First casing rotor

41.25 Mg

All weights calculated with 10 % safety factor. Use only slings that provide proper safety protection.

Class: RESTRICTED

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Weights

Siemens AG

MA &MDA

1.1.3-00300-10796/1 0806E

Power Generation

Fig. 2.3

Steam Turbines Technical Data

Design Data Valves: Types and Weights, Auxiliary Equipment

Valves, Types Number Valve

KKS

Type

2

Main steam stop and control valve

AMAA11 AA051, AMAA21AA051 AMAA12 AA151, AMAA22AA151

SSV 200-110 STV 160-110

2

HP Bypass steam stop and control valve

1MAN42AA161 2MAN42AA161

DN 250/400

2

LP Bypass steam stop and control valve

1MAN62AA161 2MAN62AA161

DN 250/400

1

LP-Inlet steam stop and control valve

AMAC45AA051 AMAC46AA151

DN 300

Valve

KKS

Type

Main steam stop and control valve, complete, without bend and pipe sections

AMAA11 AA051, AMAA21AA051 AMAA12 AA151, AMAA22AA151

Each 9 Mg

HP Bypass steam stop and control valve, complete, without bend and pipe sections

1MAN42AA161 2MAN42AA161

Each 2,9 Mg

LP-Bypass steam stop and control valve, complete, without bend and pipe sections

1MAN62AA161 2MAN62AA161

Each 1,8 Mg

LP-Inlet steam stop and control valve

AMAC45AA051 AMAC46AA151

2.2 Mg

All weights calculated with 10% safety factor. Use only slings that provide proper safety protection.

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2006 - All Rights Reserved

Weights

Siemens AG

MA &MDA

1.1.3-00400-10796/1 0806E

Power Generation

Fig. 2.4

Steam Turbines Technical Data

Design Data Steam Mass Flows, Steam Pressures, Seal Steam Supply System

Steam Flows Main Steam

LP-Induction Steam

134.0

18

Nominal

Long-term 1)

Short-term 2)

90

98.1

112.5 3)

bar

before 1st HP drum stage

87.4

91.8

91.8

bar

HP exhaust

8.0

8.4

8.4

bar

before 1st LP drum stage

8.0

8.4

8.4

bar

LP exhaust

0.14

0.5

0.5

bar

Guarantee

kg/s

Steam Pressures

1)

Long-term operation: Upper limit, permissible without time restriction.

2)

Short-term operation: Permissible instantaneous value. The cumulative duration of such overpressures must not exceed 12 hours per year.

3)

Set safety valves such as to ensure that this value is not exceeded during short-term operation. All pressures are absolute pressures.

Seal Steam Supply System MAW 35

Pressure in seal steam header (above atmospheric)

mbar

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Main Steam

Siemens AG

MA &MDA

1.1.3-00500-10796/1 0806E

Power Generation

Fig. 2.5

Steam Turbines Technical Data

Design Data Oil Requirement of Bearings, Lift Oil Pump Cut-In and Out Speeds

Estimated Oil Requirement of Bearings Bearing 1

AMAD11 HD001

1.3

dm3/s

Bearing 2

AMAD12 HD001

10.8

dm3/s

Generator front bearing

AMKD11 HD001

2.9

dm3/s

Generator rear bearing

AMKD12 HD001

2.9

dm3/s

Lift Oil Pump Cut-In and Out Speeds

Class: RESTRICTED

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Lift oil pump must be in operation at turbine speeds below about 8.5 rps to prevent damage to bearings. Lift oil pump should be cut out at speeds above approximately 9 rps. In the event that the steam turbine I&C system receives a fire protection signal, the lift oil pumps will be automatically switched off. Before the lift oil pumps can be switched on again, the emergency oil pump must be activated via operating monitor.

Siemens AG

MAD &MDA

1.1.3-00700-10796/1 0806E

Power Generation

Fig. 2.6

Steam Turbines Technical Data

Limit- and Setting Values Steam-, Casing- and Shaft-Temperatures

Steam Temperatures Nominal

Long-term but subject to annual average

400 h per year

80 h per year but no more than 15 min at a time

520

520

534

548

Main steam



C

Nominal

Long-term

Short-term 80 h per year but no more than 15 min at a time

Exceptional conditions at no-load operation

HP exhaust

204

219

247

-



LP exhaust

44

90

110

-



C C

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2006 - All Rights Reserved

Long-term value: Upper limit, permissible without time restriction Only valid after trip-out at full load operation with high reheat pressure. It is expected that the turbine has to be reloaded immediately or the unit is unloaded to minimum boiler load. At minimum boiler load no load operation is also permissible at rated main steam conditions without time restriction. Casing Temperatures / Casing Distortion Monitoring Limit Signal Formation - Settings Turning gear operation

Run up to speed

Power operation

Positive

55 K

55 K

45 K

Negative

-55 K

-55 K

-45 K

Positive

30 K

30 K

30 K

Negative

-30 K

-30 K

-30 K

Alarm

Warning Further data can be taken from the TSE limit curves Permissible steam temperature difference between parallel steam admission pipes: without time limit: 17 K for short periods (15 min): 28 K The steam temperatures in the hottest pipes must not exceed the limits given above.

Shaft Temperatures

Class: RESTRICTED

Fracture toughness of materials decreases with temperature. For start-up, a minimum temperature of 20 C is required for all shafts.

Siemens AG

MA &MDA

1.1.3-20400-10796/1 0806E

Power Generation

Fig. 2.7

Class: RESTRICTED

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Steam Turbines Technical Data

Siemens AG

Limit- and Setting Values Limit Curves / Main Steam Stop Valve

Ident: Damavand

Power Generation

MAA &MDA

Fig. 2.8

1.1.3-20500-10796/1

0806E

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2006 - All Rights Reserved

Steam Turbines Technical Data

Siemens AG

Limit- and Setting Values Limit Curves / Main Steam Control Valve

Ident: Damavand

Dep. S32M3

Power Generation

MAA &MDA

Fig. 2.9

Editing: Heue

1.1.3-20510-10796/1

0806E

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2006 - All Rights Reserved

Steam Turbines Technical Data

Siemens AG

Limit- and Setting Values Limit Curves / HP Shaft

Ident: Damavand

Dep. S32M3

Power Generation

MAA &MDA

Fig. 2.10

Editing: Heue

1.1.3-20530-10796/1

0806E

Steam Turbines Technical Data

Limit- and Setting- Values Output Limits, Motor Operation of the Generator

Output Limit during Valve Testing with Automatic Turbine Tester / Output Limit in Event of Steam Admission on One Side only Testing of main steam stop and control valve

80

%

Testing of LP inlet steam stop and control valve

80

%

Motor Operation of the Generator During motor operation, the generator keeps the turbine operating at rated speed since the steam supply to the turbine is interrupted.

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In this operation mode, the windage power of the blading causes certain turbine components to heat up. To prevent heating beyond permissible temperatures, motor operation must not be allowed to continue for more than one minute. If turbine protection criteria initiate a turbine trip, the period of motor operation must be limited to 4 s

Siemens AG

MA &MDA

1.1.3-21000-10796/1 0806E

Power Generation

Fig. 2.11

Steam Turbines Technical Data

Limit- and Setting Values Bearing Temperatures, Bearing Pedestal and Shaft Vibrations, Oil in Bearings, Hydraulic Turning Gear

Bearing Temperatures Trip to be initiated at

Standard Annunciation 

90



130



100



130



Operating temperature above 75 C up to 85 C Operating temperature above 85 C up to 90 C

110



130



115



130



Operating temperature below 75 C 



Operating temperature above 90 C



C C C C

C C C C

Vibrations Absolute bearing pedestal vibration

Relative shaft vibration

Standard alarm setting

10 µm

20 µm above normal level 1)

Maximum alarm setting

42 µm

83 µm

Trip limit

53 µm

130 µm

The normal level is the reproducible vibrational behaviour typical for the unit as a function of operating conditions

Temperature Rise of Oil in Bearings Temperature rise of oil in bearings, turbine

normal: 20

K

1

rps

Hydraulic turning gear with hydromatic gear motor / Settings Turning gear operation

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1)

Siemens AG

MAD &MDA

1.1.3-23000-10796/1 0806E

Power Generation

Fig. 2.12

Steam Turbines Technical Data

Limit- and Setting Values Vacuum Trip Setting, Condenser Pressure

Vacuum Trip Setting Vacuum trip

AMAG10 CP102 AMAG10 CP103 AMAG10 CP104

0.5 1)

bar

Vacuum trip for bypass operation

AMAG10 CP102 AMAG10 CP103 AMAG10 CP104

0.8

bar

1)

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2006 - All Rights Reserved

Permissible at full load operation only. Electrical vacuum trip setting at other load operation cases see diagramm ”Maximum permissible condenser pressure”.

Class: RESTRICTED

Maximum allowable condenser pressure as a function of the pressure before LP blading

Siemens AG

MA &MDA

1.1.3-24000-10796/1 0806E

Power Generation

Fig. 2.13

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2005 - All Rights Reserved

Steam Turbines Technical Data

Limits and Settings Air Ingress Curve

Permissible duration of air ingress as a function of mean shaft temperature at the start of air ingress

t permissible time for air ingress

# mean shaft temperature, HP shaft Caution Before air ingress make sure that an inhomogeneous temperature distribution has not already been caused by cold seal steam. Adherence to this curve is required during startup with air ingress to prevent closure of clearances within the turbine.

Class: RESTRICTED

For reasons of corrosion chemistry, a limit of 3 hours should not be exceeded for each individual event. 30 hours maximum may be accumulated over the year.

Siemens AG

MA &MDA

1.1.3-24500-00001/1 1102E

Power Generation

Fig. 2.14

Steam Turbines Technical Data

Limits and Setting Values Speeds, Electrical Overspeed Trip Setting

Speed 50 rps

Rated speed

Speeds during full load and auxiliary-load operation Maximum speed without time restriction

50.5 rps

Minimum speed without time restriction

49.0 rps

Permissible speed for no more than 2 hours during load operation within the LP blading’s lifetime No-hold speed range during operation under no-load conditions 1) (due to possible blade vibration excitation)

below: 49.0 rps above: 50.5 rps 11.83 rps to 47.50 rps

1)

Unit must be accelerated through this critical speed range without any hold points to avoid blade damage due to resonant frequencies.

Standard electrical overspeed trip setting 110 %

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Standard electrical overspeed trip setting

Siemens AG

MA &MDA

1.1.3-25050-10796/1 0806E

Power Generation

Fig. 2.15

COMBINED CYCLE POWER PLANT

Damavand (Unit 1 - 6) Thermal Kit

STG Correction Curves

Export classification AL: N __________ ECCN: N____________ Goods labeled with "AL not equal to N" are subject to European or German export authorization when being exported out of the EU. Goods labeled with "ECCN not equal to N" are subject t o US reexport authorization. Even without a label, or with label " A L : N or "ECCN:N", authorization may be required due to the final where abouts and purpose for which the goods are to be used.

D C

B

A 00

FIRST ISSUE

0806

MP-DMC-BA-16-TGD-006

00 Page 1 of 22

Fig. 2.16

Guarantee: Kerman, Damavand, Isfahan with duct firing

0.110 2297.2 151.709 0.8782

8.5 18

Datum Date bearb. coord. geprüft checked freigeg. released

18 May 04 18 May 04 18 May 04

Name Name

F. Deidewig N. Pieper N. Pieper

Siemens AG Power Generation Handhabung:

Restriktiv / Restricted

Abtlg. Dept.

PG S32M1

2904.4 230

Maßstab Scale Benennung / Title

Specification:

KUN 351.00

Kerman, Damavand, Isfahan – Thermal Kit Z-Code: A0184A8101

Form. Z−Sy. Spra.

Zeichnungs−Nummer / Drawing No.

A4

10792-980500 Weitergabe sowie Vervielfältigung dieser Unterlage, Verwertung und Mitteilung ihres Inhaltes nicht gestattet., soweit nicht ausdrücklich zugestanden. Zuwiderhandlungen führen zu Schadensersatz. Alle Rechte vorbehalten, insbesondere für den Fall der Patenterteilung oder GM−Eintragung.

Fig. 2.17

Index Blatt/Sheet

E

5

Maße nicht abgreifbar Not to scale

Condenser Pressure Correction to Load Kerman, Damavand, Isfahan Condenser Pressure Correction to Load with varied LP Exhaust Massflow 1.00 95% LP flow f7,L = 474.16x72 - 80.377x7 + 3.1048

Correction to Load f7, L [%]

0.50

0.00 105% LP flow f7,L = 407.11x72 - 79x7 + 3.7677 -0.50 100% LP flow f7,L = 462.28x72 - 85.211x7 + 3.78 -1.00 0.080

0.085

0.090

0.095

0.100

0.105

0.110

0.115

0.120

0.125

0.130

0.135

0.140

LP Exhaust Pressure x7 [bar]

7 ⎛ f ⎞ Corrected Power: Pcorrected = Pmeasured ⋅ ⎜⎜1+ ∑ i ⎟⎟ , with fi = correction factors ⎝ i=1 100 ⎠

These parameters are constant: HP steam flow = 134.0 kg/s HP steam temperature = 520.0 °C HP turbine flow swallowing capacity = 2.766

kg m3 × s bar × kg

LP induction steam flow = 18.0 kg/s LP induction steam temperature = 230.0 °C LP induction steam pressure = 8.5 bar Condenser pressure = 0.110 bar Datum Date bearb. coord. geprüft checked freigeg. released

18 May 04 18 May 04 18 May 04

Name Name

F. Deidewig N. Pieper N. Pieper

Siemens AG Power Generation Handhabung:

Restriktiv / Restricted

Abtlg. Dept.

PG S32M1

Maßstab Scale Benennung / Title

Specification:

KUN 351.00

Kerman, Damavand, Isfahan – Thermal Kit Z-Code: A0184A8101

Form. Z−Sy. Spra.

Zeichnungs−Nummer / Drawing No.

A4

10792-980500 Weitergabe sowie Vervielfältigung dieser Unterlage, Verwertung und Mitteilung ihres Inhaltes nicht gestattet., soweit nicht ausdrücklich zugestanden. Zuwiderhandlungen führen zu Schadensersatz. Alle Rechte vorbehalten, insbesondere für den Fall der Patenterteilung oder GM−Eintragung.

Fig. 2.18

Index Blatt/Sheet

E

12

Maße nicht abgreifbar Not to scale

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Class: RESTRICTED

3

4

5

6

7

9

10

8

1104E

3.1

1.1.4-11110-01401/1

1 Coupling

5 E Turbine Section / Outer Casing

2 Turbine Shaft

6 E Turbine Section / Inner Casing with Blading, Drum Stages 7 E Turbine Section / Blading, LP Stages

3 E Turbine Section / Front Bearing Pedestal 4 Combined Journal and Thrust Bearing

8 E Turbine Section / Steam Exhaust End

9 E Turbine Section / Rear Bearing Pedestal 10 E Turbine Section / Journal Bearing

Description of Components Main Components

MA &MDC E Turbine / Principal Overview

Steam Turbines Description

2

E Series

Siemens AG

Power Generation

1

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Steam Turbines Description

Siemens AG

Power Generation

Description of Components Arrangement Drawing

MA &MDC 1204E

3.2

1.1.4-11130-00010/1

Arrangement E Turbine / Principal Illustration

Steam Turbines Description

Description of Components E Turbine Section / Fixed Points

Design of the supports for the turbine on the foundation has to allow for the movement of the turbine during thermal cycling. Constrained thermal expansion would cause over stressing of the components. The method of attachment of the turbine components is also critical to the magnitude of the differential axial expansion between the rotor and turbine casings. The following components form the fixed points for the turbine:

centerline level. The exhaust end of the steam turbine is supported by multi-ball bearings thereby allowing movement. The axial position of the turbine casing is fixed at the front casing support (3). Thermal axial expansion of this casing originates from this fixed point. The central location of the turbine casing transverse to the turbine centerline is provided by two casing guides (7; 8)

• the bearing pedestals of the steam turbine • the front support brackets of the steam turbine • the combined journal and thrust bearing in the front bearing pedestal of the steam turbine

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2005 - All Rights Reserved

Casing Expansion The front bearing pedestal (1) is anchored to the foundation by means of anchor bolts and is fixed in position. The rear bearing pedestal is integrated in the exhaust casing (5). The inlet end of the steam turbine rests with its lateral support brackets on the front bearing pedestal at the turbine

Rotor Expansion The combined journal and thrust bearing (2) is housed in the front bearing pedestal of the steam turbine. The rotor expands from this bearing towards the exhaust casing.

Differential Expansion The differential expansion between the rotor and casing results from the difference between the expansion originating from the bearing pedestal in front of the steam turbine and that originating from the combined thrust and journal bearing. The greatest differential expansion of the steam turbine thus occurs at the end farthest from the combined thrust and journal bearing.

5 4

1 2 3 7 8 6

Class: RESTRICTED

Fig.1 Fixed Points of the turbine

1

Front bearing pedestal

5

Exhaust casing

2

6

Base plate

3

Combined journal and thrust bearing (Fixed point for the rotor) Fixed point for turbine casing

7

Casing guide

4

Steam turbine

8

Casing guide

Siemens AG Power Generation

MAB/MAC &MDC

1.1.4-11140-00016/1 0105E

Fig. 3.3

Steam Turbines Description

Description of Components E Turbine Section / Valve Arrangement

General Arrangement

induction steam (5) to the LP blading. As a result of the short length of the interconnecting pipework, the volume of steam trapped between the control valves and the steam turbine is small which gives excellent trip reliability of the turbine generator unit.

The steam turbine (1) has two main stop and control valves (2) in combination and one induction steam and control valve (3).

Steam Flow Main steam (4) is admitted through steam lines, first passing the stop valves and then the control valves. The control valves are flanged to the bottom half of the turbine casing. Main steam first flows trough the HP drum blading and then through the LP drum blading. The induction steam stop and control valve (3) admit

Valve Actuation Each stop valve has a dedicated hydraulic stop valve actuator and all control control valves a hydraulic control valve actuator. The actuators are mounted in an easy configuration above floor level being such easily accessible and easy to operate.

5 4

2

3

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1

4

2

Class: RESTRICTED

Valve Arrangement (Top View)

1 Steam Turbine

4 Main Steam Admission

2 Main steam stop and control valve

5 Induction steam admission

3 Induction steam and control valve

Siemens AG Power Generation

MAA/MAC &MDC

1.1.4-20140-00001/1 1204E

Fig. 3.4a

Class: RESTRICTED

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Steam Turbines Description

Power Generation

Description of Components E Turbine Section / Valve Arrangement

2

Valve Arrangement (Side View)

Siemens AG

MAA/MAC &MDC

1.1.4-20140-00001/2

1204E

Fig. 3.4b3.4b

Steam Turbines Description

Description of Components E Turbine Section / Casing

Construction and Function

the rotor. The steam admission connections are designed to avoid constraining thermal expansion in any way. The inner casing is fixed to the outer casing in the horizontal and vertical plane

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The casing is split horizontally and is of double-shell construction. An inner casing (4.5), a stationary blade carrier (6) and two stationary blade rings (7) are supported in the casing. Steam enters the inner casing through the admission pipe units (8). After exiting the inner casing it flows through the LP blading together with induction steam. The provision of an inner casing confines the high-temperature and high-pressure steam inlet conditions to the admission section of the casing, while the joint flange of the outer casing is subjected only to the lower pressure and temperature effective at the exhaust from the inner casing. This means that the joint flange can be kept small and material concentrations in the area of the flange reduced to a minimum, thus avoiding difficulties arising from deformation of a casing with flange joint due to nonuniform temperatures rises, e.g. on startup and shutdown. The joint of the inner casing is relieved by the pressure on the outer casing so that this joint only has to be sealed against the resulting differential pressure.

Admission Pipe Units The L-ring seals (10) form the connection of the admission pipe units to the inner casing (5). One leg of the L-ring (10) engages behind the collar of the threaded ring (9) in the admission pipe unit (8), while the other fits into the annular groove in the inner casing. The treaded ring (9) is fitted in such a way that the short leg of the L-ring can slide freely between the collar of the threaded ring and the admission pipe unit. The steam pressure prevailling on the inside forces the sealing ring against the face of the admission pipe unit. The tolerances of the annular groove in the inner casing are dimensioned to allow the long leg of the L-ring seal (10) to slide. The L-rings are flexibly expanded by the pressure on the inside and their outer areas forces against the annular grooves to provide the desired sealing effect. Sealing in case of steam extraction is also effected by L-rings. While providing a tight seal, this arrangement permits the inner casing to move freely in all directions

Support of the Inner Casing in the Outer Casing In the horizontal plane the four support brackets of the top half of the inner casing (4) rest on plates (11), which are supported by the joint surface on the bottom half of the outer casing (3). The inner casing can expand freely in all directions in the horizontal plane at the points of support. Thermal expansion in the vertical direction originates from the point of support at the joint. This ensures concentricity of the inner casing relative to the rotor in this plane. The support brackets provided on the bottom half of the inner casing (5) project into the recesses in the bottom half of the outer casing (3) with clearance on all sides. Located on top of each support bracket is a spacer disk (12), whose upper surface has a clearance S to the face of the top half of the outer casing (2). This clearance thus determines the lift of the inner casing.

Axial Fixture and Alignment of the Inner Casing The inner casing is located axially by the shims (13) arranged on both sides of the support brackets of the bottom half of the inner casing (5). Thermal expansion in the axial direction originates from these points. Radial expansion is not prevented by these keys (13) since they are free to slide in the recesses of the bottom half of the outer casing. In the vertical plane there are 3 centering guides, two in the casing lower section and one in the casing upper section. The guides, which consist of an eccentric bolt (22) and a sliding piece (23) fitted in the outer casing, slide within the axial grooves of the inner casing. This arrangement allows displacement of the inner casing while the turbine is closed to ansure optimum alignment of the inner casing to the rotor. Relative expansion between inner and outer casings, resulting from temperature differences, are radially and axially compensated by these sliding blocks guided in the slots of the inner casing.

Attachment of the Inner Casing Axial Alignment of the Stationary Blade Carrier and Stationary Blade Rings The stationary blade carrier and the stationary blade rings are aligned in a similar manner to the outer casing.

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Due to the different temperatures of the inner casing relative to the outer casing, the inner casing is attached to the outer casing in such a manner as to be free to expand axially from a fixed point and radially in all directions while maintaining the concentricity of the inner casing relative to

Siemens AG Power Generation

MAB/MAC &MDC

1.1.4-20120-00006/1 1204E

Fig. 3.6

Steam Turbines Description

Description of Components E Turbine Section / Casing

1

Z

2

7

6

4

26

A

U U

3

Z

5

Z

Fig. 1 E-Turbine Section, Longitudinal Section

1

Turbine rotor

6

Stationary blade carrier

2

Top half outer casing

7

Stationary blade ring

3

Bottom half of outer casing

25

Base plate

4

Top half of inner casing

26

Exhaust casing

5

Bottom half of inner casing

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25

Siemens AG Power Generation

MAB/MAC &MDC

1.1.4-20120-00006/2 1204E

Fig. 3.7

Class: RESTRICTED

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Steam Turbines Description

1 Turbine rotor

2 Top half outer casing

Siemens AG

Power Generation

Description of Components E Turbine Section / Casing

A

2

1

8

V

Fig. 2 Steam Admission

8 Admission pipe

MAB/MAC &MDC

1.1.4-20120-00006/3

1204E

Fig. 3.8

Steam Turbines Description

Description of Components E Turbine Section / Casing

V

9 5 8

10 Fig. 3 L-Ring Seal Link

Bottom half inner casing

9

Threaded ring

8

Admission pipe unit

10

L-ring Seal

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5

5

7

6

3

W

H

X

J

Fig. 4 View of the joint surface for the bottom half of the outer casing with inner casing, stationary blade carrier and stationary blade rings

Bottom half of outer casing

6

Stationary blade carrier

5

Bottom half of inner casing

7

Stationary blade ring

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3

Siemens AG Power Generation

MAB/MAC &MDC

1.1.4-20120-00006/4 1204E

Fig. 3.9

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Steam Turbines Description

11 Base Plate

12 Base Plate

Siemens AG

Power Generation

Description of Components E Turbine Section / Casing

M−M

M N−N

12 12

11

13

W X

M N

13

MAB/MAC &MDC

N

Fig. 5 Support and Fixation of Inner Casing in the Horizontal Plane

Key

1.1.4-20120-00006/5

1204E

Fig. 3.10

3.10a

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Steam Turbines Description

14 Spacer bolt

15 Plate

Siemens AG

Power Generation

Description of Components E Turbine Section / Casing

H

G1 G

14 15

16

MAB/MAC &MDC

G

G1

G−G 16

G1−G1

Fig. 6 Support of Stationary Blade Carrier in the Horizontal Plane

Washer

1.1.4-20120-00006/6

1204E

Fig. 3.11

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Steam Turbines Description

17 Spacer bolt

18 Plate

22 Centering bolt

Siemens AG

Power Generation

Description of Components E Turbine Section / Casing

J F1

F

23

F

F1

F−F

19 17 18

F1−F1

Fig. 7 Support of Stationary Blade Rings in the Horizontal Plane

19 Washer

Z 23

22

Fig. 8 Inner Casing Centering Guide

Shim

MAB/MAC &MDC

1.1.4-20120-00006/7

1204E

Fig. 3.12

3.12a

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Steam Turbines Description

24

Power Generation

Description of Components E Turbine Section / Casing

U

U1

Siemens AG U1

U1−U1

24

Fig. 9 Casing Guide of the Stationary Blade Carrier and Stationary Blade Ring

Key

MAB/MAC &MDC

1.1.4-20120-00006/8

1204E

Fig. 3.13

Steam Turbines Description

Description of Components E Turbine Section / Casing Supports and Guides

Casing Support

of the support brackets. When the turbine is being erected, the clearance "s" is established between the spacer (5) and the outer casing support bracket projections and likewise on the exhaust end between the nuts and the spacers of the anchor bolts.

The turbine casing is supported on the support brackets and multi-ball bearing supports such as to make allowance for thermal expansion and contraction. It is essential for the casing to retain concentric alignment with the rotor, which is supported independently. The outer casing (2) is supported with its two front support brackets on the bearing pedestal (1) at the turbine centerline level. At the exhaust end the turbine casing is supported on the foundation by brackets welded to the exhaust casing, multi-ball bearing supports and base plates. This arrangement determines the height of the casing. For allowing thermal expansion in the horizontal plane, the support brackets can glide on the sliding pieces (6) and the brackets of the exhaust casing can glide on the multi-ball bearing supports (13). To prevent lifting of the outer casing (2), bows (4) on the bearing pedestal hold down projections

Guides The central location of the outer casing at right angles to the turbine centerline is provided by guides shown in section B-B and view Z. These guides allow the outer casing to expand freely in an axial direction.

Fixed Points The fixed point of the outer casing (2) is located at the front support bracket at the turbine centerline level and is formed by the fitted keys (9,10). Axial expansion of the outer casing (2) originates from this point.

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3 X

2

1 Y

Z

Fig.1 Supports and Guide of the E Turbine casing

Front bearing pedestal of the E turbine

2

Outer casing

3

Exhaust casing

Class: RESTRICTED

1

Siemens AG Power Generation

MAB/MAC &MDC

1.1.4-20123-00005/1 1005E

Fig. 3.14

Class: RESTRICTED

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Steam Turbines Description

Siemens AG

Power Generation

Description of Components E Turbine Section / Casing Supports and Guides

X

4

5 S A

A

C

A−A 6 B

9

4

Bow

7

Key

5

Spacer

8

Plate

6

Sliding piece

9

Key

MAB/MAC &MDC

C

B

B−B C−C

8 7

7 6

8

Fig.2 Detail X: Supports and Guide at the Front Bearing Pedestal

1.1.4-20123-00005/2

1005E

Fig. 3.15

s

Fig. 3.15a 3.12a

65-E_312a_vord.Geh.auflage_Kazeroon . ppt 05 07

© Siemens AG • Power Generation (PG)

ST Casing Support and axial Fixing at Combined Bearing DT Gehäuseauflage und axiale Fixierung am Kombinierten Lager

Steam Turbines Description

Description of Components E Turbine Section / Casing Supports and Guides

Z

G

H

H

G

H−H

17

15

16

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Fig.3 Detail Z: Supports and Guide at the Rear End of the Casing

15 Key

17 Plate

16 Sliding piece

Y 19

3

13 18

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Fig.4 Detail Y: Supports and Guide at the Rear End of the Casing

3 Exhaust casing 13 Multiball bearing

Siemens AG Power Generation

18 Anchor bolt 19 Spacer

MAB/MAC &MDC

1.1.4-20123-00005/3 1005E

Fig. 3.16

s

3.16a Fig. 3.13a

65-E_313a_hintere.Geh.auflage_Kazeroon . ppt 05 07

ST Casing Support at Exhaust End DT Gehäuseauflage, hinten

© Siemens AG • Power Generation (PG)

3.16b

Steam Turbines Description

Description of Components E Turbine Section / Shaft Seal

Function

The seal strips are caulked into the shaft (1) and the shaft seal casing (8).

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The E turbine section is fitted with two outer shaft seals (X,Z). The function of the outer shaft seals is to seal the interior of the turbine casing and the oil section on the exhaust side against the atmosphere at the shaft bushings. The inner seal separates the pressurized chamber of reheated steam from that of LP-steam. Sealing between shaft and casing takes place via axially passed non-contacting seals. In the range of smaller differential expansions near to the combined thrust and journal bearing grooved labyrinth seals are implemented with seals strips in the seal rings mounted in the casing (see Fig.2). The seal strips are mounted on spring-backed rings. The pressure differences in the seal chamber in each ring lead to a defined axial positioning of the ring. In the range of larger differential expansions at the exhaust side, the seal rings are implemented as straight seals with the seal strips located directly opposite each other.

Gap Sealing The pressure gradient across the seals is realized by conversion of pressure energy into velocity (kinetic energy), which is then dissipated by turbulence as the steam passes through the numerous compartments.

Steam Spaces Steam spaces are provided within the outer shaft seals. The seal steam header is connected to space S. The small amounts of leakage steam which pass the seals to space T are conducted from this space into the seal-steam condenser. The space A containing air at atmospheric pressure separates the steam from the oil section of the exhaust end.

X

Z

Class: RESTRICTED

Fig.1 Longitudinal Section

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MAB/MAC/MAW &MDC

1.1.4-20125-00007/1 1104E

Fig. 3.17

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Steam Turbines Description

Siemens AG

Power Generation

Description of Components E Turbine Section / Shaft Seal

X

U 3

T S 4

U Fig.2 Shaft Seal (Detail X), Principal Drawing

1 Shaft 3 Seal strip

2 Casing 4 Caulked material

MAB/MAC/MAW &MDC

1.1.4-20125-00007/2

1104E

Fig. 3.18

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Steam Turbines Description

Siemens AG

Power Generation

Description of Components E Turbine Section / Shaft Seal

Z 2

S

1 Shaft

2 Casing / Rear Bearing Pedestal

8 Shaft seal casing

T

1 W Y

9

10

MAB/MAC/MAW &MDC

W

8 10 9

A Y 10 9

Fig.3 Shaft Seal (Detail Z)

Seal strip

Caulked material

1.1.4-20125-00007/3

1104E

Fig. 3.19

3.19a

Steam Turbines Description

Description of Components Shop Assembly Procedure

SST-3000 series

IL Turbine (5.0 / 6.3 / 6.9 / 8.0 / 10 / 12.5 m2)

Shop Assembly Procedure IP and LP bottom halves are placed vertical and then bolted and pinned together.

Step 2

IP and LP top halves are placed individually on the bottom halves in the vertical position. The casing joint bolts are tightened cold. Die Oberteile werden miteinander verstiftet und verschraubt. The top halves are pinned and bolted together. The axial casing joint is then pinned. The casing joint is opened and the casing halves are separated while still vertical.

Step 3

The two outer casing bottom halves are set down horizontally in the assembly stand.

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For information only

Step 1

Siemens AG Power Generation

1.6.4-20712-00001/1 0902E

3.20a

Steam Turbines Description

Description of Components Shop Assembly Procedure

SST-3000 series

IL Turbine (5.0 / 6.3 / 6.9 / 8.0 / 10 / 12.5 m2)

The inner casing and the shaft gland are set down in the casing bottom halves.

Step 5

Installation of the stationary blade carrier bottom half.

Step 5a

Installation of the stationary blade ring bottom halves

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For information only

Step 4

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1.6.4-20712-00001/2 0902E

3.20b

Steam Turbines Description

Description of Components Shop Assembly Procedure

SST-3000 series

IL Turbine (5.0 / 6.3 / 6.9 / 8.0 / 10 / 12.5 m2)

The alignment shaft is set down on auxiliary bearings. Equipment for radial measurements is connected.

Step 7

The shaft gland top sections, inner casing top halves, stationary blade ring top half and the bearing pedestal top section are set up. The inner casing studs are heated.

Step 8

The outer casing top halves are placed in position. Measurements are performed with the alignment shaft. The casing joint studs are tightened cold to provide a tight joint.

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For information only

Step 6

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1.6.4-20712-00001/3 0902E

3.20c

Steam Turbines Description

Description of Components Shop Assembly Procedure

SST-3000 series

IL Turbine (5.0 / 6.3 / 6.9 / 8.0 / 10 / 12.5 m2)

The outer casing top half is removed. The internals are displaced in line with alignment shaft measurements. The outer casing top half is again installed and alignment shaft measurements are performed. All top sections are removed.

Step 10

The original rotor is installed with the shaft seal casing and bearing shell in place. All axial and radial clearances are measured.

Step 11

The inner and outer top halves are re-installed. The internals are ready for operation.

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For information only

Step 9

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1.6.4-20712-00001/4 0902E

3.20d

Steam Turbines Description

Description of Components Shop Assembly Procedure

SST-3000 series

IL Turbine (5.0 / 6.3 / 6.9 / 8.0 / 10 / 12.5 m2)

The shaft seal casing is aligned. The bearing pedestal is completed. A radial clearance check is performed.

Step 13

The bearing cover is placed in position. The outer casing is removed and the bearing cover is installed. The outer casing is then assembled. Installation of the hydraulic motor and all connections is completed.

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For information only

Step 12

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1.6.4-20712-00001/5 0902E

3.20e

3.21a

3.21b

Steam Turbines Description

Description of Components E Turbine Section / Blading

Drum Stages

(3) and airfoil (5). The stationary blades have L-roots (1) and the moving blades inverted T-roots (2). Stationary and rotating blades are inserted into matching slots in the inner casing or stationary blade carrier and shaft respectively and are caulked in place with caulking material (4).

The drum stages mounted in the inner casing or stationary blade carrier and in the shaft are reaction stages with around 50 % reaction. The blades comprise the blade root, an integral shroud

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4

3

1

5

2 4

3

Fig. 1 Arrangement of stationary and moving blades in the drum stages* 1 L-root

3 Integral shroud

2 T-root

4 Caulking material

5 Airfoil * shows a typical blade arrangement The insertion slots for the rotating blades are closed by means of a locking blade held in position by taper pins or set screws. After assembling the complete blade ring the integral shrouds form a continuous shroud band which is finish machined to provide the labyrinth seal geometry.

Class: RESTRICTED

LP Stages The LP blading comprises three reaction stages. The stationary and rotating blades in these stages have tapered and twisted profiles to account for the considerable difference in circumferential speed at the hub and tip. The blades of the first row of LP stationary blades are designed with L-root and an integral shroud as in the drum stages. The split stationary blade rings are manufactured by welding together the inner rings (7), blades (8) and outer

Siemens AG Power Generation

rings (9) into half rings which are then attached to the inner casing. After assembly of the complete ring the inner rings form a continuous shroud band. Depending on the risk of water droplet erosion in the last-stage rotating blades, the hollow last-stage stationary blades (10) are provided with: (a) drain slots, which allow extraction of the condensate film forming on the stationary blade airfoils in the condenser, or (b): heating. In the latter case, the condensate film forming on the stationary blade airfoils is evaporated, thus preventing the formation of large water droplets. The blades of the first row of LP rotating blades are designed with inverted T-root (11) and an integral shroud (12) as in the drum stages. The last two rows of rotating blades are designed with fir-tree roots (13) which are inserted in axial slots in the turbine shaft and secured by caulking pieces.

MAA / MAC &MDC

1.1.4-20130-00008/1 1004E

3.23

Steam Turbines Description

Description of Components E Turbine Section / Blading

They are secured against axial movement by retaining strip segments. The end segments are spot welded at the joint. The rotating blades of the both last rows have also integral shrouds. A defined clearance exists between the

shrouds which closes when the shaft rotates at a specific speed. Improved damping behavior of the blade ring is the result. Blade tip losses are minimized using a seal geometry as described under the section "Reducing tip clearances".

12 9 12 9 12

10

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8 8

11

7

13

7

13

Fig. 2 LP stages, arrangement of stationary and moving blades*

7 Inner ring

11 T-root

8 Airfoil

12 Integral shrouds

9 Outer ring

13 Fir-tree roots

10 Last stationary blade row * shows a typical blade arrangement

Reducing tip clearances

in the stationary and rotating components. Should faulted operating conditions cause rubbing, the abradable seal strips wear down without causing any appreciable heatup. They can then be easily replaced at a later date to restore the required clearances.

Class: RESTRICTED

To reduce blade tip losses, sealing geometries are used which cause optimum turbulence in the leakage flow in the spaces between the individual sealing elements. The sealing elements consist of machined tips and caulked seal strips

Siemens AG Power Generation

MAA / MAC &MDC

1.1.4-20130-00008/2 1004E

3.24

s

65_325b.1_Schaufelvorspannung Trommelstufen. ppt 12 07

„ Pre-twist during blade assembly due to rhombic base area „ Elastically pre-stressed blades

© Siemens AG • Power Generation (PG)

Shroud

„ Blade ring with excellent damping characteristics „ Careful control of blade pre-twist during assembly

z

F

Pre-Stress

Root Assembly Fig. 3.25b_1

Elastically Pre-Stressed Blade Ring of Drum Blading

Elastisch vorgespannter Schaufelverbund der Trommelbeschaufelung

s

65_325c.4_Trommelbeschaufelung mit Kronendichtung .ppt 12 07

Castellated labyrinth seal Kronenartige Labyrinthdichtung

© Siemens AG • Power Generation (PG)

Integrated shrouds Integrierte Dichtbänder

Cylindrical blade Zylindrische Schaufel

Fig. 3.25c_4

Drum Blading with Twisted Blades and Castellated Shrouds Trommelbeschaufelung mit verwundenen Schaufeln und Kronendeckband

Twisted blade Verwundene Schaufel

s

65_328.10_Einbau ND-Schaufeln 07 07 © Siemens AG • Power Generation (PG)

Standard stages Normstufen

Twisted drum stages verdrehte Trommelstufen

Standard stages: For every LP exhaust area (5 / 6.3 / 6.9 / 8 / 10 /12.5 / 20 / 30 m2) the same finally designed design is used. The first LP stages are project specific seleted. Normstufen: Für jede ND-Austrittsgröße (5 / 6.3 / 6.9 / 8 / 10 /12.5 / 20 / 30 m2) wird das gleiche fertig konstruierte Design verwendet. Die ersten ND-Stufen werden projektspezifisch ausgewählt.

LP Turbine, Moving Blades Assembling Fig. 3.28_10

ND-Turbine, Einbau der Laufschaufeln

EN+DE

65_328.32_Schaufeln d. letzten ND Stufe,5870,5871_6R0

s Mapna22: with shroud!

© Siemens AG • Power Generation (PG)

Drainage slots Wasserabsaugeschlitze = OPTION

Leading edge Eintrittskante

Trailing edge Austrittskante

Trailing edge Austrittskante Leading edge Eintrittskante

Rotating blade Laufschaufel

Fig. 3.28_32

Stationary blade Leitschaufel

Blades of a final LP Stage

Schaufeln einer letzten ND Stufe

Guide blade ring Le-0 Leitschaufelring Le-0 EN+DE

Steam Turbines Description

Description of Components Turbine Bearings Design

The bearing housings or pedestals consist of cast upper and lower halves bolted together at the horizontal joint. The pedestals are fixed directly to the foundation and are separate from the turbine casing. In addition to supporting the turbine rotor on the bearings, the pedestals serve to support and guide the HP turbine casing. Anchor bolts and cast ribs, underneath the pedestal baseplates, transmit any loads which can arise, for example from friction at casing supports or from earthquakes or piping forces, directly to the foundation. Bearing forces acting upwards, which can occur through extreme unbalance, are transmitted from the bearing shell to the pedestal cover and then via directly adjacent anchor bolts to the foundation. Horizontal forces, transverse or axial, are transmitted via the bearing shell to the pedestal via the trunnions on the bearing shell and fitted blocks. To avoid oil leakage, oil baffles with multiple seal strips seal the shaft penetrations through the bearing housings. Oil vapour exhausters maintain a constant negative pressure in the bearing housings, increasing the effectiveness of the seals.

Bearings The bearings are oil lubricated plain bearings with the oil feed from one side. In order to provide stable running behaviour for the light rotor in the E turbine, the E turbine bearings are designed as narrow journal bearings. Modified elliptical bearings are used for the rear bearing of the E turbine, as these exhibit good system damping while requiring less lubricant and having low friction losses. The thrust bearing is located between the generator and the E turbine and is integral with the journal bearing. To avoid metal-to-metal contact in the bearing at start up and at low running speeds, and to reduce the start up torque, the rotors are lifted by introducing high-pressure oil into the area between the bottom of the journal and the bearing. The front bearing of the E turbine is mounted on spherical

seats, the bearing located in the axial exhaust is aligned by fine adjustment to fitting pieces at the sides and top. This allows self-alignment of the bearings to accommodate rotor deflection.

Main Oil Pump The main oil pump system supplies the bearings with oil.

Shaft Lifting Devices Lifting devices are provided at each pedestal to allow rotor coupling and shaft alignment. These devices are retracted and secured in place during turbine operation, so as to be quickly available for lifting rotors when bearing checks are to be performed.

Centre Guides The turbine is provided with a front and rear centre guide located below the longitudinal axis to maintain horizontal axial alignment at the turbine. For the E turbine front end, the centre guide is cast integral with the pedestal and engages with a mating recess in the turbine casing. For the rear of the E turbine, the centre guide is bolted to the exhaust casing and engages with a baseplate fixed to the foundation. After alignment, the position is fixed using fitted keys. The centre guide permits free movement of the turbine casing due to thermal expansion in the vertical and axial directions.

Casing Fixed Points The pedestal containing the combined journal and thrust bearing is the fixed anchor point for the shaft line and casing so that both the shaft line and the turbine casing expand away from this point. The turbine supports at the pedestal are provided with integral downward facing trunnions, which engage with mating recesses in the pedestal to provide axial location between the turbine and pedestal, whilst allowing lateral movement caused by expansion. Slide plates with dry lubricated facings are fitted to minimize the effect on the centre guide of friction forces resulting from lateral movement.

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Bearing Housings

Siemens AG Power Generation

MAD & MDC

1.1.4-30200-00005/1 1104E

3.33

3.33a

3.33b

Steam Turbines Description

Description of Components E Turbine Section / Front Bearing Pedestal

Arrangement

Connection of Bearing Pedestal and Foundation

The front bearing pedestal is located between the generator and the turbine. Its function is to support the turbine casing and bear the turbine rotor. The bearing pedestal houses the following components:

The bearing pedestal is aligned on the foundation by means of hexagon screws being screwed into the bearing pedestal. On completion of alignment, the space beneath the bearing pedestal is filled with special non-shrinking grout. The bearing pedestal is anchored to the foundation by means of anchor bolts (10). The defined position of the bearing pedestal on the foundation is established by projections in the bearing pedestal base engaging in recesses in the foundation.

• • • • • •

Combined journal and thrust bearing Bearing pedestal and shaft vibration pick-up Speed measurement Shaft postion measurement Temperature measurement (radial and axial) Key phaser

8

6

1

A

3

7

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

5

4

2

A Fig.1 Longitudinal Section

Bearing pedestal - upper section

5

Rotor of E-turbine

2

Bearing pedestal - lower section

6

Bearing seal ring

3

Combined journal and thrust bearing

7

Bearing seal ring

4

Rotor of generator

8

Coupling

Class: RESTRICTED

1

Siemens AG Power Generation

MAD &MDC

1.1.4-30585-00001/1 1104E

3.34

Steam Turbines Description

Description of Components E Turbine Section / Front Bearing Pedestal

A−A

B−B

9

1 10 B 2

B

1

Bearing pedestal - upper section

9

Bearing pedestal and shaft vibration pick-up

2

Bearing pedestal - lower section

10

Anchor bolt

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Fig.2 Cross Section of Thrust and Journal Bearing

Siemens AG Power Generation

MAD &MDC

1.1.4-30585-00001/2 1104E

3.35

s

Fig. 3.36a_E

65_336.E.a-b_Lagergeh.f.komb.Lager, E Kazeroon . ppt 05 07

Bearing Pedestal for combined Bearing Lagergehäuse für Kombiniertes Lager

© Siemens AG • Power Generation (PG)

s

Fig. 3.36b_E

65_336.E.a-b_Komb. Lager mit Keilen arretiert E yazd. ppt 04 06

Combined Bearing with Keys Kombiniertes Lager mit Keilen arretiert

© Siemens AG • Power Generation (PG)

Steam Turbines Description

Description of Components E Turbine Section / Rear Bearing Pedestal, Integrated

Arrangement

of mounting transfers all bearing loads to a support ring which is connected with the exhaust casing via struts. The loads originating from the exhaust casing are transmitted to the foundation via supports. The journal bearing is situated in the oil space of the bearing pedestal. It transmits the weight of the rotor to the bearing pedestal. At the turbine end the oil space is sealed from the outside by the bearing seal ring, and at the condenser end by a cover. To prevent leaks within the steam space the lines are protected by guard pipes

The bearing pedestal is situated in the exhaust casing of the steam turbine. Its function is to bear the turbine rotor and serve as a mount for the shaft seal. The bearing pedestal is easily accessible through the opening in the exhaust casing.

Construction The rear bearing pedestal consists of a steel ring with an integral bearing seal ring and an end cover. The bearing pedestal is aligned with the turbine casing and is pinned and bolted to the exhaust casing. This manner

2

4

3

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

1

5

6 Fig.1 Longitudinal Section through the Integrated Bearing Pedestal

Turbine rotor

4

Journal bearing

2

Shaft seal

5

Cover

3

Bearing pedestal

6

Exhaust Casing

Class: RESTRICTED

1

Siemens AG Power Generation

MAD11 HD001 &MDC

1.1.4-30590-00004/1 1104E

3.38

Steam Turbines Description

Description of Components E Turbine Section / Rear Bearing Pedestal, Integrated

9 8

3

4

10

11 12 Fig.2 Cross Section through the Journal Bearing

3

Bearing pedestal

9

Seal steam

4

Journal bearing

10

Bearing oil

7

Jacking oil

11

Oil drain

8

Oil vapor extraction

12

Leakoff system

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

7

Siemens AG Power Generation

MAD11 HD001 &MDC

1.1.4-30590-00004/2 1104E

3.39

3.39a

s

Fig. 3.47a.2

65_347a.2 Keile und Gleitstücke E yazd. ppt 04 06

© Siemens AG • Power Generation (PG)

Key and Sliding Pices for Alignment, Fixing and Support of Bearings and Casings Keile und Gleitstücke zum Ausrichten, Fixieren und als Auflage von Lagern und Gehäusen

Steam Turbines Description

Description of Components Combined Journal and Thrust Bearing

Function

in position by taper pins and bolted together. The bearing liner (5) is provided with a babbitt face. The thrust pads being positioned in the annular grooves of the bearing body are tiltable due to cylindrical pins (20) and are flexibly supported by spring elements (18) (section F-F). The running faces of the pads are babbitted. They support on the turbine rotor ring faces. The design of the bearing with spherical piece and seat allows the adaptation of the radial and axial bearing faces to the rotor deflection curve when installing The bearing shells are located laterally by keys (8). Vertically acting forces are transferred to the foundation via the support and the sole plate of the bearing pedestal. Forces acting upwards which may occur in case of extreme unbalances, are transferred to the bearing pedestal upper part via keys (3) and passed to the foundation via anchor bolts arranged beside.

The function of the combined journal and thrust bearing is to support the turbine rotor and carry the residual axial thrust of the combined turbine rotor system which is not compensated for by the balance piston. The magnitude and direction of the axial thrust to be carried by the bearing depends on the load conditions of the turbine. With the exception of thermal expansion, the bearing maintains desired axial running clearances for the combined turbine rotor system.

Construction and Mode of Operation

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The combined journal and thrust bearing consists of an upper and lower bearing shell (2; 9) with integrated oil collection vessels, axially split journal bearing liner (5), thrust pads (4), spherical block (11), spherical seat (13) and keys (3; 8). The upper and lower halves of the bearing shell are fixed

Z

A−A

B−B

B

A D

1

C

2 3

4 5 6 Y

D 8 a1

a2

9 C

11 10 13

A

B

Class: RESTRICTED

Fig. 1 Longitudinal and Cross Section of the Combined Journal and Thrust Bearing

1 2 3 4 5

Bearing pedestal, upper part Upper bearing shell Key Thrust pad Bearing liner

Siemens AG Power Generation

6 7 8 9 10

Turbine shaft Bearing pedestal, lower part Key Lower bearing shell Shim

MAD12 &MDC

11 12 13 a1, a2

Spherical block Shim Spherical seat Jacking oil

1.1.4-30630-00003/1 1101E

3.48

Steam Turbines Description

Description of Components Combined Journal and Thrust Bearing

E−E 16

G−G

Z

G

G

7

9

D−D 17

14 15

Fig. 2 Details Z, G, E and D 7 Bearing pedestal 9 Lower bearing shell

14 Key 15 Key

16 Thermocouple 17 Thermocouple

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Temperature Measurement Metal temperature just below the babbitt lining in the upper and lower part of the bearing sleeve (section D-D) and in two axial thrust pads each (sections E-E) is monitored by thermocouples (16;17).

Oil Supply The bearing exhibits two oil distributors which are directly supplied by the one-sided lubrication oil flow (a1 or a2) or

circumferential ducts in the bearing upper section. Part of the oil leaves these distributors via bores in the bearing sleeve, entering the oil pockets of the journal bearing. Via recesses in the bearing body, the larger part of the oil is directly supplied to annular ducts, mixing with the oil leaking from the journal bearing. It will then flow to the thrust bearing areas. Having passed the thrust bearing, the oil passes the collecting boxes being cast on at both sides and sealed against the shaft and is routed to the bearing pedestal lower section.

F−F C−C

2

2

4 19

E

18 E 4

Class: RESTRICTED

20 9 Fig. 3 Details C and F 2 Upper bearing shell 4 Thrust pad 9 Lower bearing shell

Siemens AG Power Generation

18 Backing ring 19 Key 20 Dowel pin

MAD12 &MDC

1.1.4-30630-00003/2 1101E

3.49

Steam Turbines Description

Description of Components Combined Journal and Thrust Bearing

Jacking Oil

gear. For this, high pressure jacking oil is supplied via borses and threaded pieces to two packets located at the bottom center of the bearing. Sealing rings (21) located between the bearing liner (5) and the lower bearing shell prevent any oil from penetrating.

Passages are located at the two pits (detail Y) in the lower bearing shell through which high pressure jacking oil a (section B-B) is supplied under the journal to prevent dry friction when the turbine rotor is at turning gear operation and to reduce the breakaway torque before startup of the turning

Y

5

Fig. 4 Detail Y

5 Bearing liner 21 Sealing ring

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

21

Siemens AG Power Generation

MAD12 &MDC

1.1.4-30630-00003/3 1101E

3.50

65_355_Axiallager-Prinzip EN+DE_7R08.jä.0209

s

© Siemens AG • Power Generation (PG)

Combined journal and thrust bearing Kombiniertes Trag- und Axiallager

Shaft / Welle A

Bearing shell Lagerschale

A

A

A Thrust (= Axial) pad Lagerstein, Axialklotz

Thrust Bearing, Working Principle Fig. 3.55_1

Axiallager, Grundprinzip

EN+DE

s

65_356e_Siemens-Klotzlager Yazd . ppt 03 06

Siemens Axial Bearing Fig. 3.56e

Siemens-Axiallager

© Siemens AG • Power Generation (PG)

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Steam Turbines Description

Description of Components Journal Bearing

HE Series, E Series

E Turbine

Construction

side and flows to oil spaces that are milled into the bearing shell and are open to the rotor journal. Oil from the oil spaces machined in the babbitting is picked up by the rotor and emerges from the bearing shell from where it is collected in the splash oil duct and drained into the bearing pedestal.

The function of the journal bearing is to support the turbine rotor. Essentially, the journal bearing consists of the bearing body (3), the adjustment fixtures (7), the sleeves (8), oil ducts (2) and the keys (4;11). The bearing is provided with a non-split, forged bearing body (3) and a babbitt face. Clamping of the babbitt in dovetail grooves improves the running behavior in case of insufficient oil supply. Vertical forces are transferred to the bearing pedestal (6) via lateral keys being inserted in the sleeves (8), the fixtures (7) and the keys (4). Horizontal forces are transferred to the bearing pedestal via an extension being arranged in the center and the keys (11). Axially, the bearing is held in position by means of adjustment fixtures bolted to the pedestal (6). The bearing is designed in such a way to allow the bearing shell to adapt to the shaft deflection curve. In vertical plane, keys (4) are fitted between the fixture (7) and bearing pedestal (6), while in horiziontal plane the bearing is fixed by the keys (11) between the bearing pedestal (6) and the extension of the bearing body (3).

Monitoring The babbitt temperature is measured thermocouples (12) below the running face.

with

the

Bearing Jacking Oil System To avoid breakaway torque and to avoid dry friction at lower speeds, for example during turning gear operation, the rotor is lifted by jacking oil. The oil is passed to the two pits at the lower bearing peak.

Insertion and Removal of Bearing Body The rotor is lifted slightly by means of the lifting fixture but within the clearance of the shaft seals. The bearing body can then be axially removed or inserted. A simple fixture facilitates this process.

Oil Supply Lubricating oil is admitted to the bearing shell from one

A−A 3

A 6

2

1

B

C

B

3 4 7 8

4

9 D

C

A

D

5

Class: RESTRICTED

Fig.1 Journal Bearing 1

Turbine rotor

6

Bearing pedestal

2

Oil ducts

7

Adjustment fixture

3

Bearing body

8

Sleeve

4

Key

9

Line for bearing oil

5

Lines for jacking oil

Siemens AG Power Generation

MAD11 HD001 &MDC

1.1.4-30685-00001/1 1002E

3.57

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Steam Turbines Description Description of Components Journal Bearing

HE Series, E Series E Turbine

C−C

Siemens AG

Power Generation

B−B

6 4

8 7

10 11

3

D−D

12

Fig.2 Details of Journal Bearing

3 Bearing body 8 Sleeve

4 Key 10 Strap

6 Bearing pedestal 11 Key

7 Adjustment fixture 12 Thermocouples

MAD11 HD001 &MDC

1.1.4-30685-00001/2

1002E

3.58

TU 10.4.1

Class.: UNRESTRICTED

Klass.: OFFEN Copyright


Siemens AG 1994 – All Rights Reserved

SIEMENS

Radiallager Radial Bearing

KWU / WM M–TDKE 5031

1294

3.58a

Bearing Alignment = in Accordance with

natural Bending Line of ST Shaft 0. Bearing pedestal alignment 1. Shaft alignment 2. Bearing alignment 3.59

3.59a

Steam Turbines Description

Description of Components Hydraulic Turning Gear

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

with Hydraulic Motor

Function

Arrangement

The function of the hydraulic turning gear is to rotate the shaft system at sufficient speed before startup and after shutdown in order to avoid non-uniform heatup or cooldown and the associated distortion of the turbine rotor.

The hydraulic turning gear is situated in a separate pedestal at the exciter end of the generator.

Hydraulic Turning Gear 1 Hydraulic Motor

6 Ball bearing

11 Bearing

2 Profiled shaft

7 Bearing pedestal

16 Shaft

3 Leakage oil pipe

8 Housing

4 Cover 5 Shaft flange

9 Holding ring 10 Overrunning Clutch

Class: RESTRICTED

Mode of operation The hydraulic motor (1) is connected to the bearing pedestal (7) via the cover (4) and the housing (8). The rotation of the hydraulic motor is transmitted via the specially profiled shaft (2) and the engaging flange (5) to the outer ring of the overrunning clutch (10). The outer ring is supported in the casing (8) by the holding ring (9) and the ball bearings (6). The inner ring of the overrunning clutch (10) is mounted directly on the end of the shaft (16). The engaging elements of the overrunning clutch are supported by a cage and are installed such that they engage during turning gear operation and create a force fit between the outer and inner ring. The entire shaft train is then driven by the hydraulic motor (1) via the profiled shaft (2), engaging flange (5), overrunning clutch (10) and output shaft (16). When the turbine is run up, the engaging elements of the clutch swing out, breaking the connection. At higher speeds,

Siemens AG Power Generation

centrifugal force causes the engaging elements, which rotate with the inner ring, to retract until no longer in contact with the outer ring, so that they cause no wear during turbine operation. The oil for the hydraulic turning gear is supplied from the jacking oil system. After startup of the hydraulic jacking oil system, the hydraulic turning gear is also switched on. Turning gear speed is governed by an adjustable throttle in the feed line to the hydraulic motor. When throttle control is used, the speed of the hydraulic turning gear increases or decreases as the torque required for turning the turbine shaft drops or rises. This permits detection of any alignment failures or rubbing. The leakage oil from the hydraulic motor (1) flows via the leakage oil pipe (3) into the collar of the cover (4) to lubricate the overrunning clutch (10). The ball bearings (6) are lubricated by the return oil.

MAK &MDC

1.1.4-32000-00011/1 1204E

3.62

Steam Turbines Description

Description of Components Hydraulic Turning Gear

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

with Hydraulic Motor

14 Jacking oil line

15 Return line

Protecting the turning gear bearings During turbine operation the bearings for the hydraulic motor (1) and the overrunning clutch (10) must be protected against standing corrosion damage. After shutdown of the hydraulic jacking oil supply the hydraulic motor is lubricated and turned using low-pressure oil (approx. 2 bar) from the lube oil system.

Manual Turning Gear

hydraulic turning gear to enable the line of shafting to be rotated manually (see also Description, "Manual Turning Gear").

Lifting of Shaft To overcome the initial breakaway torque on startup and to prevent dry friction, the bearings are relieved for a short time, i.e., the shafts are lifted slightly, by jacking oil introduced from below.

Class: RESTRICTED

A manual turning gear is provided in addition to the

Siemens AG Power Generation

MAK &MDC

1.1.4-32000-00011/2 1204E

3.63

For information only Copyright (C) Siemens AG 2004 - All Rights Reserved

Class: UNRESTRICTED

Steam Turbines Description

Description of Components Operating Principle of a Denison Hydraulic Motor

HMN, KN, HE, DN, SN, E Series

Type: Radial Piston Motor

Functional Description

This timing system is also of a patented design being pressure balanced and self compensating for thermal expansion.

The outstanding performance of this motor is the result of an original and patented design. The principle is to transmit the effort from the stator to the rotating shaft by means of a pressurized column of oil instead of the more common connecting rods, pistons, pads and pins. This oil column is contained a telescopic cylinder with a mechanical connection at the lips at each end which seal against the spherical surfaces of the cylinder-heads and the spherical surface of the rotating shaft. The lips retain their circular cross section when stressed by the pressure so there is no alteration in the sealing geometry. The particular selection of materials and optimisation of design has minimized both the friction and the leakage. Another advantage of this design stems from the elimination of any connecting rods, the cylinder can only expand and retract linearly so there are no transverse components of the thrust. This means no oval wear on the moving parts and no side forces on the cylinder joints. A consequence of this novel design is a significant reduction in weight and overall size compared with other motors of the same capacity.

Radial Piston Motor; Motortype MR - MRE

Timing System

Efficiency

The timing system is realizedby means of a rotary valve driven by the rotary valve driving shaft that it is connected to the rotating shaft. The rotary valve rotates between the rotary valve plate and the reaction ring which are fixed with the motor's housing.

The advantages of this type of valve coupled with a revolutionary cylinder arrangement produce a motor with extremly high values of mechanical and volumetric efficiency. The torque output is smooth even at very low speed and the motor gives a high performance starting under load.

Arrangement Drawing of Radial Piston Motor 1 Telescopic cylinder

4 Rotating shaft

7 Reaction ring

2 Rotating shaft

5 Rotary valve

8 Rotary valve driving shaft

3 Cylinder-heads

6 Rotary valve plate

a Pressurized column of oil

Siemens AG Power Generation

1.6.4-32040-00003/1 0804E

3.64b

≥ ≥

Steam Turbines Description

Description of Components Manual Turning Gear

HMN, KN, HE Series

Multi Shaft Arrangement

Function

level with the horizontal joint of the bearing pedestal so that it is always ready for operation. The lever (2) is hinged in the fork (4) via pin (7). The pawl (6), in turn, is attached to the lever via a pin (5). When the lever is operated the pawl engages the gear wheel (1) to turn the shaft. Leverage can be increased by lengthening the lever with a bar. The mechanism pivots on pin (7). When the turning gear is in use the pawl (6) is supported by the pawl support pin (8). For turbine operation the turning mechanism is disengaged and retracted and secured using locking pin (9). The coupling cover (19) provides additional protection against inadvertent engagement.

For information only

In addition to the hydraulic turning gear, a manual turning gear is also provided for turning the shaft by hand. It is used both for manual rolloff of the turbine/generator and for turning the line of shafting through a set angle, e.g. in the event of failure of the hydraulic equipment for startup and shutdown (hydraulic motor).

Design and Function The main components of the manual turning gear are a gear wheel (1) on the rotor, the turning mechanism, the lever (2) and the locking pin (9). The turning mechanism is mounted on the outside on one

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

4 9

2

3

6

5

1

7

10

8

Manual turning gear

Class: RESTRICTED

In operation

Retracted (during turbine operation)

1 Gear wheel

6 Pawl

2 Lever

7 Pin

3 Split pin

8 Pawl support pin

4 Fork support

9 Locking pin

5 Pin

Siemens AG Power Generation

10 Coupling cover

MAD &MDC

1.1.4-30690-00005/1 0302E

3.68a

s

65_369c_Handdrehen u. Drehzahlmess_ETurbine.ppt 04 07

Kazeroon

Fig. 3.69c

© Siemens AG • Power Generation (PG)

Amata

Balancing and Overspeed Test Wuchten und Überdrehzahltest

s

Fig. 3.70a

65-E_370a_E-Turb. bei der Montage . ppt 06 06

E-Turbine during Factory Assembly E-Turbine während der Montage

© Siemens AG • Power Generation (PG)

Steam Turbines Description

Description of Components Combined Main Steam Stop and Control Valve

Function and Design

the valve is open and provides additional sealing at this point. Graphite packing rings (9) seal the valve stem (4). The stop valve is opened by the hydraulic actuator (11) and closed by spring force.

One stop and one control valve are combined in a common body. The main stop valve provides a means of isolating the turbine from the main steam line and can rapidly interrupt the supply of steam to the turbine. The control valve controls the steam flow to the turbine according to the prevailing load.

Stop Valve

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The stop valve is a single seat valve with integral pilot disk. Steam enters the valve body (1) with steam strainer (5) via the inlet connection and remains above the valve disk (3) when the stop valve is closed. A pilot disk integral with the valve stem (4) is incorporated in the valve disk to relieve the steam pressure on the valve disk and thus reduces the force required to open the valve.There is a bead on the back of the valve disk which lies against the base bushing (6) when

Control Valve The one part stem (13) of the control valve with tubular valve disk slides in the bushing of the valve cover. Balancing holes in the valve disk reduce the operating force required. Also this disk is provided with a back seal getting active with fully open valve. Packing rings (15) seal the valve stem (13) in the valve cover (14). The control valve is operated by the piston of the actuator (16), i.e. the valve is opened hydraulically and closed by spring force. In the event of a disturbance in the system or on turbine trip both stop valve and control valve close rapidly.

Legend List SSV Stop Valve 1 Valve body

STV Control Valve 13 Valve stem with valve disk

2 Valve seat

14 Valve cover

3 Valve disk

15 Packing ring

4 Valve stem with pilot disk

16 Control valve actuator

5 Steam strainer 6 Base bushing 7 Valve cover 8 Gland bushing

L1 Spindle leakoff steam

9 Packing ring 10 Support 11 Stop valve actuator

Class: RESTRICTED

12 Valve seat

Siemens AG Power Generation

1.1.4-16010-00001/1 0201E

4.1

Class: RESTRICTED

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Steam Turbines Description

Siemens AG

Power Generation

Description of Components Combined Main Steam Stop and Control Valve

11

10

9

L1

16 8 7 6 5 4

3 2 1

12

15 14

13

Combined Main Steam Stop and Control Valve

1.1.4-16010-00001/2

0201E

Fig. 4.1a

s

65_401b.10_FD-Ventileschnitt m. Diffusor 164-16055 /90-140bar_EN+DE_7R07

© Siemens AG • Power Generation (PG)

1

Schnellschluventil (SSV) Schaltantrieb Säule Dichtungsring Kammerbuchse Ventilspindel mit Vorhubkegel 6 Deckel 7 Grundbuchse 9 Ventilkegel 10 Ventilsitz 11 Ventilgehäuse 12 Dampfsieb m. Wellbandwicklung

Trip Actuator Schaltantrieb

1 2 3 4 5

2

3

Stop Valve Schnellschlussventil

MAM

4 6 7

Stellventil (STV) 21 22 23 24 25 26 27 30

Stellantrieb Säule Dichtungsring Kammerbuchse Ventilspindel mit Ventilkegel Deckel Grundbuchse Ventilsitz

12

Control Actuator Stellantrieb

21

Fig. 4.1b_10

5 9 10 11

22

23

24

26

27

25

30

Emergency Stop Valve (ESV) 1 Stop valve actuator 2 Support 3 Packing ring 4Gland bushing 5 Valve stem with pilot disc 6 Valve cover 7 Base bushing 9 Valve disk 10 Valve seat 11 Valve body 12 Steam strainer

Control Valve (CV) 21 22 23 24 25 26 27 30

Control valve actuator Support Packing ring Gland bushing Valve stem with valve disc Valve cover Base bushing Valve seat

Control Valve Stellventil

HP Turbine Valves, Section HD-Turbinenventile, Schnitt

EN+DE

65_402.1x_EHA -Antriebe_EN+DE EHA4_jä1208

s

© Siemens AG • Power Generation (PG)

For stop vale Für Schnellschlußventil

ST controller DT Regler

Control fluid Steuerflüssigkeit

160 bar

..AA013 Trip solenoid valves SS-Auslöse-Magnetventile

Pilot vale Pilotventil For control vale Für Regelventil

Servo vale Servoventil

..AA014 Control block at actuator Steuerblock am Antrieb

T

Position measurement Positionsmessung C

D

CLOSE ZU

Magnet Magnet C = Closing (time) orifice D = Dumping orifice

T

C = Schließzeitdrossel D = Dämpfungsdrossel

Cup spring part Tellerfeder

Fig. 4.2a 4.2_10

Hydraulic part Hydraulikteil

Electro-Hydraulic Actuator (EHA) for ST Stop and Control Valves, Function Elektrohydraulischer Antrieb (EHA) für DT Schnellschluß- und Regelventile, Funktionsweise

EN+DE

I

6 5 _ 4 0 2 b _ E H A 3 .d s f/ 1 6 4 _ 1 6 1 1 2 -0 0 0 0 1 1 1 0 4

9

©

S ie m e n s A G

• P o w e r G e n e r a tio n ( P G )

7

7 8

C lo s in g tim e o r ific e S c h lie ß z e itd r o s s e l

1

P o s itio n tr a P is to n D a m p in g c D a m p in g p G a p C u p s p r in g T r ip s o le n o S e rv o re s p F ilte r P re s s u re T a n k 2

P

3 4

T 5 6 7

D a m p in g o r ific e D ä m p fu n g s d ro s s e l

8 9 P T

h a m b e r is to n s ta c k id v a lv e s . p ilo t v a lv e

1

C L O S E Z U

1 2 3 4 5 7

6

C o n tro l s tro k e - a c tu a to r a ) = v a lv e s tr o k e G e s a m th u b - A n tr ie b = V e n tilh u b c ) C u s h io n in g le n g th D ä m p fu n g s lä n g e

6

F ig . 4 .2 b

n s m itte r

5

4

3

2

T o ta l s tro k e - a c tu a to r b ) G e s a m th u b - A n tr ie b

E le c tr o - h y d r a u lic A c tu a to r fo r S T S to p a n d C o n tr o l V a lv e s

E le k t r o h y d r a u lis c h e r A n tr ie b fü r D T S c h n e lls c h lu ß - u n d R e g e lv e n tile

T

P

9

8

W e g e m e ß u m fo rm e r K o lb e n D ä m p fu n g s ra u m D ä m p fu n g s k o lb e n S p a lt T e lle r fe d e r S S - A u s lö s e M V S e r v o b z w . P ilo t M V F ilte r D r u c k a n s c h lu ß T a n k a n s c h lu ß

65_404_L+U-Ring .dsf 01 04

s

© Siemens AG • Power Generation (PG)

L

U

U

Leak-off steam Absaugung

Fig. 4.4

Steam Turbines, L-Ring and U-Ring Connection Dampfturbinen, Winkelring- und U-Ringverbindung

Steam Turbines Description

Description of Components Steam Strainer

Function

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2004 - All Rights Reserved

Steam strainers are installed in the LP supply steam lines. They protect the turbine and the blading from foreign objects.

Fig.1 Steam Strainer / Arrangement

Class: RESTRICTED

1 2 4 5 6 7

Ring Strainer screen Reinforcing ring Rod Ring Casing (optional)

A I

Construction The strainer screen (2) is made of corrugated strip wound on edge on a frame. This design offers a high degree of resistance, even to particles impinging at high velocity. The frame consists of two rings (1, 6) and a number of rods (5) welded between the rings. The rods are additionally

Siemens AG Power Generation

Steam Outlet Steam Inlet

braced by reinforcing rings (4) pinned inside them. The strainer is designed for a single direction of flow from the outside inwards. For longer strainers, the screen is made up of several parts. The end turns of the corrugated strip are then tacked to the T section intermediate rings (3).

LBA &MDC

65_413a+b_Zud.sieb 11 04.pdf

1.1.4-10500-00003/1 1104E

4.13a

65_504.1_Schwing.Mess. an der DT STD BMAD10 + BMAD11_8R0

s

© Siemens AG • Power Generation (PG)

Absolut bearing pedestal vibration Absolute Lagergehäuseschwingung

Relative shaft vibration Relative Wellenschwingung

Accelerometer Beschleunigungsaunehmer

MAD11CY021 MAD11CY022 0..20 mm/s

0..400 µm

Wegaufnehmer (Wirbelstromprinzip)

CY

CY CY

45°

CY

Sresx=

OM 1.1

Proximity probe (eddy current principle)

MAD11CY041 MAD11CY042

mm/s

MAD11 CY021

veff 1.2

mm/s

MAD11 CY022

Sx + Syy

2

2

OM

MAD11CY940

37.2 µm

Resultant relative shaft vibration Resultierende relative Wellenschwingung (0 - 250 µm, simple peak)

130 µm

11,8 mm/s

ST Protection (trip, 2oo2) DT Schutzauslösung (2v2)

“Monitoring Criterion” “Überwachungskriterium”

Option: 2oo3

Fig. 5.4_01

Vibration Measurings at Steam Turbine Schwingungsmessungen an der DT

65_506_rel.Wellenschw.mess.WM_BMAD11, Vibro-MeterTQ402, TQ412_ EN+DE .ppt 01 07

s Δ Metal

HF ~ 1...2 MHz

U[mV] = f(Δ, ..)

Meßbereich Empfindlichkeit

© Siemens AG • Power Generation (PG)

X Y

Eddy current sensor in a resonant (oscillatory) circuit Sensitivity: 1…10 mV/µm, depending on kind of metal and distance

Y(t)

Wirbelstromaufnehmer im elektrischen Schwingkreis Empfindlichkeit = 1…10 mV/µm, abhängig von Metallart und Abstand

t

X(t)

Sres(t)

S

2 oder 4 mm 4 mV/µm oder 8 mV/µm 1.25 µA/µm oder 2.5 µA/µm

S(t)peak

MAD..CY041

t

MAD..CY042

Sres(t) =

X(t)2 + Y(t)2

[µm] 0-pk, simple peak, meas.range 0..250 µm [µm] 0-pk, Einfachamplitude, Meßber. 0..250 µm 90°

90°

Option

4 mm

Y

X

WAY-MEASURING-SYSTEM SIGNAL CONDITIONER

Gleichrichter

INPUT X

RECTIFIER

Wegmeßsystem Signalaufbereiter

TQ412

AMPLIFIER

Gleichrichter

RECTIFIER

****

S(t)

AMPLIFIER

OK SYSTEM: - INPUT >MIN & = ST speed >= 8 % (avoidance of forced vibration excitation).  Above critical speed: Switch ON Criteria Switch OFF Criteria TLe-0 [o C]

THood [o C] > 90 > 90 > 90

OR OR OR

TLe-0 [o C]

> 140 > 140 > 140

PCond [mbarabs ]

Cooling Stages 1 2 1+ 2

AND P Cond < 100 On AND 100 < PCond< 200 On AND P Cond > 200

TLe-0 [oC] > 180

P Cond [mbar abs] P Cond > 100

1

2

On 1+ 2 ON

TLe-0 [o C]

THood [o C] < 60 < 60 < 60

THood [o C] < 60

AND AND AND

< 100 < 100 < 100

AND

TLe -0 [oC] < 100

Additional to the temperature limit values the LP water injection is switched off when the turbine load exceeds a certain turbine load (app. 20 % of nominal load, 32 MW).  For ST speed < 8 % of turbine operating speed (turning speed): Bypass Operation Seal Steam Operation TLe-0 [oC] Water Injection Time THood ON OFF

ON ON

> 140

OR

> 90

On On

Water Injection downstream E-Turbine (condensate, multi stage)

without limit 30 minutes

Fig. 7.10

1

2

No. ID-code

FGC

Signal

Ind. Designation

3 SEC

Setting

4

5

Dest.

6

7 Signal

Function

Unit

8

ID-code

Dest.

Designation

SEC FGC

No.

Unit

Ind.

Setting

1

1

2

A

3 4

AMAC10CT171A LP EXHAUST TEMP

AMAC33

AMAC10CT111A TEMP LP INNER CASING 1

AMAC32

XH03 HIGH

°C

/D001 N

XH05 > 140

°C

/D001 N

#[LaStern, unsym]

5

>1

6 7 B

AMYA01CS901 SPD ACT VAL

AMYA20

XH87 0.1 XH58 < 0.2

18 AMAW10EG003 SEAL STM SUPPLY 19

AMAW01

AMYA20 AMYA20

AMAG11

XH09 > 180 XH63 MAX 11

14

/S003 N /S003 N

15

BYPASS OPERATION /B003

/U001 N

&

16/0 Z4/52

&

min 0

&

23

OFF /B003

17

16/0 Z1/51

ZV01 WTR INJ LP-CASING

19 D

AMAC01AA002 /B001 ZV01 N WTR INJ LP-CASING

16/0 Z4/52

20

>1

16/0 Z1/51 BL AP

PROT CLS /B001

A ON

DCM

channel

22

16/0 Z4/52 1 EN ON

23

P ON

24

OM

1

16/0 Z1/51

economy drive

26 27

18 TURN OP

21

1 P EN A OFF OFF OFF

24

&

16/0 Z4/52

& 16/0 Z1/51

CB OFF

XB95 WTR INJ LP-CASING XB95 AMAA40EJ202 ST W-UP/DRAINS/MARG

25 OM YP01

YCKYSA

PG L119 7.110a

AP 16 AP-F 0

Cycle Z4

AT

26

28

XB01 /Z1/B001

m01es1::neka 2005-05-26 Dep.: 2005-06-23

E

27

CB ON

28

20.04.04 12.11.04 20.06.05 Date

C

16

30

Preliminary R_FOR_FAT AS_BUILT Modification 1

B

9

16/0 Z1/51

/U001 N

22

0 A B Status

3

13

21

F

A

12

XB01 /B001

25

AMAC01AA002 /B001 ZV04 N WTR INJ LP-CASING ZV04 N

16/0 Z4/52

/D002 N /R008 N /R004 N

°C

20

E

TTD AP # 16/0 Z1/51

2 PROT CLS

BYPASS OPERATION /B003

9

C

ZV04 WTR INJ LP-CASING

PROT CLS /B001

PB 52 PB F

AZ AZ AZ Name

Date 26.05.2005 Drawn Tarantik Check Zindler Stand. PG L119 2

MAPNA Co. IPDC Neka CCPP Original replaced by. 3

SIEMENS AG SIEMENS 4

AMAC02

FC SA

YFR MP-NKC-IA-08-TKY-002

WTR INJ LP-CASING Function diagram individual level 5

B001

= AMAC01AA001 +

Page 1 Sh. 4

AMAC02 6

7

8

1

2

No. ID-code

FGC

Signal

Ind. Designation

A

D

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

C

E

Setting

4

5

Dest. Unit

8

ID-code

Dest.

Designation

SEC FGC

No.

Unit

Ind.

Setting

1

2

2

3

3

4

4

5

5

6

6 AMKA01CE003A GEN ACTIVE POWER 1

AMKA00

XQ01 0..218

MW

/Z3 N

#[EW]

8

8

9

9 Nennleistung/-druck

10

A

7

159

11

(anlagenspezifisch gemäß Datenblatt!) X1 X2 F 16/0

16/0 F Z1/51

B

10

Z1/51

11

12

12 X

13

1 SWITCH

13

14

0.1

HYS

14

15

0.2

GW

15

16

AP Q

17

C

16

16/0 Z1/50

17

18

18

19

19 D

P > 20% /B003

20

20

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

m01es1::neka 2005-05-26 Dep.: 2005-06-23 0 A B Status

7 Signal

7.110b PG L119

F

6

Function

1

7 B

3 SEC

Preliminary R_FOR_FAT AS_BUILT Modification 1

AP 16 AP-F 0

Cycle Z4

AT

E

PB 52 PB F

20.04.04 12.11.04 20.06.05 Date

AZ AZ AZ Name

Date 26.05.2005 Drawn Tarantik Check Zindler Stand. PG L119 2

MAPNA Co. IPDC Neka CCPP Original replaced by. 3

SIEMENS AG SIEMENS 4

AMAC02

FC SA

YFR MP-NKC-IA-08-TKY-002

WTR INJ LP-CASING Function diagram individual level 5

B002

= AMAC01AA001 +

Page 2 Sh. 4

AMAC02 6

7

8

1

2

No. ID-code

FGC

Signal

Ind. Designation 1 2

A

3 4

3 SEC

Setting

2LBA96DP001 LP B/P PRES CTRL 2LBA55DP001 HP B/P PRES CTRL 1LBA96DP001 LP B/P PRES CTRL

2MAN70

1LBA55DP001 HP B/P PRES CTRL

1MAN20

2MAN20 1MAN70

XT15 >0 XT15 >0 XT15 >0 XT15 >0

4

5

Dest.

C

D

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

9

AMYA20

XV01 IN OPER XH63 4

21 AMAG10FP002 CONDENSER VACUUM 22 AMAG10FP002 CONDENSER VACUUM 23

AMAG11

AMAC32 AMYA20

XH55 < 60 XH57 < 100 XH87 0.1 XH58 < 0.2

barabs barabs

&

/S003 N /S003 N

&

21

16/0 Z1/51

>1

16/0 Z1/51

16/0 Z4/52

22 ZV02 WTR INJ LP-CASING AMAC01AA002 /B001 ZV02 N WTR INJ LP-CASING

23 INJ OFF 24

25

25

>1

27 28

7.110c PG L119

Preliminary R_FOR_FAT AS_BUILT Modification 1

20.04.04 12.11.04 20.06.05 Date

AP 16 AP-F 0

Cycle Z4

AT

E

26

16/0 Z4/52

27 28

OFF /B001

m01es1::neka 2005-05-26 Dep.: 2005-06-23 0 A B Status

C

15

16/0 Z1/51

26

F

B

10

16/0 Z1/51

/R004 N /R016 N

s-1

24 E

7

9

&

AMAC33

6

BYPASS OPERATION /B001

8

16 17 AMAC10CT171A LP EXHAUST TEMP 18 AMAC10CT111A TEMP LP INNER CASING 1 19 AMYA01CS901 SPD ACT VAL 20

5

P > 20% /B002

16/0 Z1/51

/U001 N /R008 N

s-1

A

4

11 XH51 MAX XH10 > 0.1

barabs

2

/B001 N /S003 N

3

4

&

5 6 7 B

AMAC01AA001 WTR INJ LP-CASING AMAC10CT111A TEMP LP INNER CASING 1

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

D

AMAG11 AMYA20

XH10 > 0.1 XH87 1

12 ZV02 INJ OFF

11

16/0 Z4/52

12 13

>1

15 ZV04 PROT CLS

16/0 Z4/52

15 16

/B001 N

17

18

18 1 P EN A OFF OFF OFF

19

BL AP

DCM

1 EN ON

A ON channel

1

P ON

19 D

22

XB95 WTR INJ LP-CASING

OM 16/0 Z1/51

economy drive

21 CB OFF

20 OM

XB95 AMAA40EJ202 ST W-UP/DRAINS/MARG

YP01

YCKYSA

23

24

XB01 WTR INJ LP-CASING

25

24 ON 25

XB01 /Z1

26

26

27

27

28

28

m01es1::neka 2005-05-26 Dep.: 2005-06-23

PG L119 7.110e

0 A B Status

21 22

CB ON

23

F

C

14

20

E

B

9

/B003 N

14

16 AMAC01AA001 WTR INJ LP-CASING 17

8

16/0 Z4/52

10

11

13 AMAC01AA001 WTR INJ LP-CASING

5 6

>1

AMAG10FP002 CONDENSER VACUUM 10 AMYA01CS901 SPD ACT VAL

4

16/0 Z4/52

/B001 N /D002 N

8 9

C

AMAC32

ZV01 TURN OP XH09 > 180

A

Preliminary R_FOR_FAT AS_BUILT Modification 1

20.04.04 12.11.04 20.06.05 Date

AP 16 AP-F 0

Cycle Z4

AT

E

PB 52 PB F

AZ AZ AZ Name

Date 26.05.2005 Drawn Tarantik Check Zindler Stand. PG L119 2

MAPNA Co. IPDC Neka CCPP Original replaced by. 3

SIEMENS AG SIEMENS 4

AMAC02

FC SA

YFR MP-NKC-IA-08-TKY-002

WTR INJ LP-CASING Function diagram individual level 5

B001

= AMAC01AA002 +

Page 1 Sh. 2

AMAC02 6

7

8

1

2

No. ID-code

FGC

Ind. Designation

A

Signal

3 SEC

Setting

4

5

Dest.

7 Signal

Unit

No.

Unit

Ind.

Setting

2

2

LV2 LV3 LV4

230 180 140

ULLL1

UL UL UL

TT

ULLL2 ULLL3 channel ULLL4 LL GS1 GS2 GS3 GS4

100

4 LRV 0 URV 1200 UNIT °C AI KG SIG

22

18/0 Z5/31

5 6

7

7

8

8 XQ01 TEMP LP INNER CASING 1 XQ01 AMAA40EJ202 ST W-UP/DRAINS/MARG XQ01 AMAA40EJ701 STEAM TURBINE 1

9 10 11

°C YCKYSA

10

YP01

YCKYSA

11 12

13

13

14

14

15

B

9 0..300 YP01

12

C

15

XQ01 /D002

16

16

17

XH57 TEMP LP INNER CASING 1 AMAC01AA001 /B003 XH57 N WTR INJ LP-CASING

#[AMAC02]

18

17 < 100

°C AMAC02

19

18 19 D

20

XH05 TEMP LP INNER CASING 1 #[AMAC02]

21

20 > 140

°C

AMAC01AA001 /B001 XH05 N WTR INJ LP-CASING

AMAC02

22

21 22

23

XH03 TEMP LP INNER CASING 1 XH03

24

23 HIGH YP12

24

N

E

A

3

I LV1

6

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

SEC FGC

1

5

D

Dest.

1

4

C

8

ID-code

Designation

3

B

6

Function

25

25

26 27

XH01 TEMP LP INNER CASING 1

TOO HIGH

XH01

YP11

E

26 27

N 28

F

28

m01es1::neka 2005-05-26 Dep.: 2005-06-23

PG L119 7.110f

0 A B Status

Preliminary R_FOR_FAT AS_BUILT Modification 1

20.04.04 12.11.04 20.06.05 Date

AP 18 AP-F 0

Cycle Z5

AT

PB 31 PB F

AZ AZ AZ Name

Date 26.05.2005 Drawn Bettker Check Zindler Stand. PG L119 2

MAPNA Co. IPDC Neka CCPP Original replaced by. 3

SIEMENS AG SIEMENS 4

AMAC32

FC SA

YFR MP-NKC-IA-08-TKY-002

TEMP LP INNER CASING 1 Function diagram individual level 5

D001

= AMAC10CT111A +

Page 1 Sh. 2

BMAC32 6

7

8

1

2

No. ID-code

FGC

Ind. Designation

A

Signal

3 SEC

Setting

4

5

Dest.

6

7 Signal

Function

Unit

8

ID-code

Dest.

Designation

SEC FGC

No.

Unit

Ind.

Setting

1

1

2

2

3

A

3

XQ01 /D001

4

4 X

5

1 SWITCH

5

6

3 HYS

6

7 B

180

8

AP Q

D

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

9

C

E

F

#[AMAC02]

GW

8

18/0 Z5/31

B

9

10 11

#[AMAC02]

12

#[AMAC02]

/B001 N /B001 N

XH09 TEMP LP INNER CASING 1 XH09 AMAC01AA001 WTR INJ LP-CASING XH09 AMAC01AA002 WTR INJ LP-CASING

10 > 180

°C AMAC02

11

AMAC02

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19 D

20

20

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

m01es1::neka 2005-05-26 Dep.: 2005-06-23

PG L119 7.110g

0 A B Status

7

Preliminary R_FOR_FAT AS_BUILT Modification 1

20.04.04 12.11.04 20.06.05 Date

AP 18 AP-F 0

Cycle Z5

AT

C

E

PB 31 PB F

AZ AZ AZ Name

Date 26.05.2005 Drawn Bettker Check Zindler Stand. PG L119 2

MAPNA Co. IPDC Neka CCPP Original replaced by. 3

SIEMENS AG SIEMENS 4

AMAC32

FC SA

YFR MP-NKC-IA-08-TKY-002

TEMP LP INNER CASING 1 Function diagram individual level 5

D002

= AMAC10CT111A +

Page 2 Sh. 2

BMAC32 6

7

8

1

2

No. ID-code

FGC

Ind. Designation

A

Signal

3 SEC

Setting

4

5

Dest.

6

7 Signal

Function

Unit

8

ID-code

Dest.

Designation

SEC FGC

No.

Unit

Ind.

Setting

1

1

2

2

3

3

I LV1

4

LV2 LV3 LV4

5

110 90 60

ULLL1

UL UL LL

ULLL2 ULLL3 ULLL4 LL GS1 GS2 GS3

0

6

TT

channel

4 LRV 0 URV 1200 UNIT °C AI KG SIG

5

18/0 Z5/32

5 6

7 B

7

8

1

D

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

9

C

8

18/0 Z5/32

10 11

/S001 N /S001 N

12

XM20 LP EXHAUST TEMP XM20 AMAC10EZ210 LP EXHAUST TEMP PROT XM20 AMAC10FT071A LP EXHAUST TEMP

10 CAN FLT 11 12

13

13

14

XQ01 LP EXHAUST TEMP

15

AMAC10FT071A /S001 XQ01 N LP EXHAUST TEMP XQ01 AMAY40EJ205 ST PROTECTION

16

0..150

°C

YP01

YCKYSA

15 16 17

18

XH55 LP EXHAUST TEMP #[AMAC02]

19

18 < 60

°C

AMAC01AA001 /B003 XH55 N WTR INJ LP-CASING

AMAC02

19 D 20

XH03 LP EXHAUST TEMP AMAC10EZ210 /S001 XH03 N LP EXHAUST TEMP PROT AMAC01AA001 /B001 XH03 N WTR INJ LP-CASING

22 #[AMAC02]

23

21 HIGH

°C 22 AMAC02

23

24

24

25

25

26

XH01 LP EXHAUST TEMP

27

E

26 TRIP

°C 27

AMAC10EZ210 /S002 XH01 N LP EXHAUST TEMP PROT

28

28

m01es1::neka 2005-05-26 Dep.: 2005-06-23

PG L119 7.110h

0 A B Status

C

14

17

21

F

B

9

20

E

A

Preliminary R_FOR_FAT AS_BUILT Modification 1

20.04.04 12.11.04 20.06.05 Date

AP 18 AP-F 0

Cycle Z5

AT

PB 32 PB F

AZ AZ AZ Name

Date 26.05.2005 Drawn Bettker Check Zindler Stand. PG L119 2

MAPNA Co. IPDC Neka CCPP Original replaced by. 3

SIEMENS AG SIEMENS 4

AMAC33

FC SA

YFR MP-NKC-IA-08-TKY-002

LP EXHAUST TEMP Function diagram individual level 5

D001

= AMAC10CT171A +

Page 1 Sh. 1

BMAC33 6

7

8

Steam Turbines Maintenance

Inspection Work on Steam Turbine Units

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2002 - All Rights Reserved

For information only no liability for correctness and completeness

HMN, KN, HE, DN, E Series

Types of inspections

This allows intensive checks and fact-finding to be performed on all components as well as allowing the replacement of individual parts or components based on findings. Plant operating records and the manufacturer's expertise can be used in conjunction with material investigations to provide an indication of the remaining service life of individual parts of the turbine. The scope of work on valves and controls is the same as for a medium inspection.

Depending on the scope of the inspection and maintenance work a difference is made between:

1

Minor inspection

A minor inspection should be performed during a scheduled plant outage or during outages caused by other plant components. No turbine casings or valves are opened. The controls are adjusted. Depending on findings during shutdown of the turbine control components may be inspected and checked. The inspection of selected components can provide information on the condition of individual components and thereby indicate the probable scope and time for the "Medium Inspection or Major Overhaul".

2

A "Module Inspection" differs from a "Major Overhaul" in that only individual turbine modules are opened up. However, the recommended inspection intervals for the individual turbine modules should also not be exceeded in the case of module inspections. The first module inspection is generally performed prior to a scheduled "Major Overhaul". Inspection of the last module should then coincide with this date. Module inspections can also be performed in the event of damage or faults.

Medium inspection

Selecting the time for the inspection

A medium maintenance inspection is performed during a scheduled plant outage. The measures taken during this comprehensive inspection also include, to a limited extent, modification and maintenance work. The controls are adjusted. Depending on findings during shutdown of the turbine control components may be inspected and checked. As is the case with the minor inspection, this maintenance inspection can provide more detailed information on the condition of individual components and thereby also indicate the probable scope and time for the next "Major Overhaul".

3

When scheduling the inspection, both the actual operating hours for the turbine unit and the number of starts are considered and compiled into so-called "equivalent operating hours". The equivalent operating hours are defined by the following: Tä = TB + ns x 25 where

Tä = equivalent operating hours

Major overhaul / Module inspection

TB = actual operating hours ns = number of starts, without any differentiation between warm and cold starts

Class: RESTRICTED

During a "Major Overhaul" all the turbine cylinders are opened.

Siemens AG Power Generation

MA

1.6.8-10030-00001 /1 0202E

8.1a

Steam Turbines Maintenance

Inspection Work on Steam Turbine Units

The reproduction, transmission or use of this document or its content is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Copyright (C) Siemens AG 2002 - All Rights Reserved

For information only no liability for correctness and completeness

HMN, KN, HE, DN, E Series

Inspection intervals Equivalent operating hours

25000

50000

75000

100000

125000

150000

Type of inspection

Minor

Medium

Minor

Major

Minor

Medium

Minor

Medium

Major

O

X

X

Scope of inspection Valves and actuators: Electrohydraulic actuator Stop, control and bypass valves inspected (actuator and valve trim) + replacement parts Oil supply station

O

O

X

—

O

X

Shaft seal steam control valve / controls

O

O

X

LP condensate injection valve checked

—

O

X

Vacuum breaker

—

O

X

HP steam dump

—

O

X

Induction steam butterfly valves

O

O

X

Heating steam extraction valves with actuators

O

O

X

Butterfly valves for cold reheat line and extraction inspected (actuator and trim)

O

O

X

Bolts in high-temperature areas inspected

—

O

X

Foundation Foundation and coupling check

O

O

X

Anchor bolt preload checked

—

X

X

Bearing housing and bearing: Bearing housing opened

O

X

X

Turbine unit bearings + requisite replacement parts

O

X

X

Bearings dismantled. Babbitt lining checked, clearances measured.

O

X

X

Turbine casing: Turbine casing opened + requisite replacement parts

—

O

X

Bolts in high-temperature areas inspected

—

O

X

Last stages in condensing turbines, check of condition

X

X

X

O**

X

X

HP shaft

—

—

X

E turbine shaft + weld

—

O*

X

Miscellaneous: Alignment and bump check

—

O

X

Casing and bearing pedestal guides checked + requisite replacement parts

O

X

X

Filters checked, removal and cleaning of cartridges

X

X

X

Fluid lines inspected for damage, leaks eliminated

X

X

X

Steam strainer removed and checked

O

X

X

Shaft turning gear checked

O

O

X

Re-tightening the joint bolts for the IP outer casing

Class: RESTRICTED

Turbine shaft:

X

necessary

—

not necessary

Siemens AG Power Generation

O

where required

O*

An inspection must be performed after >2000 starts

O**

Perform once, during first minor inspection

MA

1.6.8-10030-00001 /2 0202E

8.1b