EP0394894B1 - Stator interne HP-MP unique de turbine à vapeur avec climatisation controlée - Google Patents

Stator interne HP-MP unique de turbine à vapeur avec climatisation controlée Download PDF

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Publication number
EP0394894B1
EP0394894B1 EP90107617A EP90107617A EP0394894B1 EP 0394894 B1 EP0394894 B1 EP 0394894B1 EP 90107617 A EP90107617 A EP 90107617A EP 90107617 A EP90107617 A EP 90107617A EP 0394894 B1 EP0394894 B1 EP 0394894B1
Authority
EP
European Patent Office
Prior art keywords
stator
stream
steam
internal
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90107617A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0394894A1 (fr
Inventor
Jean-Pierre Gros
Patrick Laffont
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0394894A1 publication Critical patent/EP0394894A1/fr
Application granted granted Critical
Publication of EP0394894B1 publication Critical patent/EP0394894B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling

Definitions

  • the present invention relates to an HP-MP steam turbine body according to the preamble of claim 1.
  • the internal stators HP (high pressure) and MP (medium pressure) are separated by an interval and each provided with a sealing device separated from each other and having the function of reducing the natural leakage of vapor from the HP vein to the MP vein.
  • a turbine of this type is described in document CH-A-435 319. Part of the leak passes in the gap between the two sealing devices and is evacuated by the gap formed between the two internal stators in the interstatoric space; this space is thus swept by steam at high temperature, its evacuation taking place through the thermal protection means.
  • the vapor sweep in the interstatoric space thus traverses the entire space, from the axial positioning means to the thermal protection means.
  • the evacuation means are provided with means for adapting the vapor flow rate, which makes it possible to adapt the air conditioning to the desired level.
  • the means for evacuating this vapor are connected to the inlet of the reheating device supplying the vein MP.
  • At least part of the surface of the internal stator facing the rotor between the HP and MP veins is provided with a coating with low thermal conductivity.
  • the means for withdrawing steam sending this steam into the interstatoric space are constituted by pipes formed in bosses of the internal stator arranged symmetrically with respect to the axis of the turbine.
  • the external stator is thus protected from too strong convections.
  • Figure 1 shows in axial half-section a known HP-MP turbine body.
  • Figure 2 shows in axial half-section an HP-MP turbine body according to the invention.
  • FIG. 3 represents a detailed axial half-section of a preferred embodiment of the invention.
  • FIG. 4 represents a partial section along the plane IV-IV of the body of FIG. 3.
  • FIG. 5 represents a partial section along the plane V-V of the body of FIG. 3.
  • FIG. 6 represents a perspective of the detail of the body represented in FIG. 5.
  • the known turbine body shown in FIG. 1 comprises a single rotor 1 comprising an HP part 2 and an MP part 3 separated by a part 4 receiving the seals.
  • An internal HP stator 5 defines with HP part 2 an HP vein 6.
  • An internal MP 7 stator defines with the MP 3 part an MP 8 vein.
  • the two internal stators 5 and 7 are interconnected. They are positioned axially inside an external stator 9 by sealed positioning means 11.
  • an HP exhaust 15 connected through a reheating device 16 to MP intake means 17 which supply the inlet 18 of the MP stream 8.
  • the external stator 9 and the internal stators 5 and 7 define with the positioning means 11 and the thermal screen 10 an interstatoric space 19.
  • the axial positioning means 11 and the heat shield 10 are spaced from the inlets 12 and 18 of the HP 6 and MP 8 veins, so that the interstatoric space 19 surrounds all of the hot stages of the HP 6 and MP 8 veins .
  • seals 20 and 21 are arranged to separate the inlet 12 of the HP vein 6 from the inlet 18 of the vein 8.
  • the vapor entered through the interval 22 escapes towards the outlet 14 of the HP vein 6 through a slot 23 formed in the screen 10.
  • the HP-MP turbine body according to the invention is shown in FIG. 2.
  • the body according to the invention comprises a single internal stator 57.
  • the sealing means 20, 21 arranged in part 4 are in one piece.
  • the axial positioning means 11 are sealed and likewise the thermal protection means 10 are also sealed.
  • the interstatoric space 19 surrounds almost all of the stages of the HP vein 6 and the hot stages of the MP vein 8.
  • An inlet 24 into the interstatoric space is provided in the internal stator 57 in the vicinity of the thermal protection means 10. This inlet brings into the space 19 the vapor drawn off from one of the last stages of the HP vein 6 , for example, upstream of the last stage 25.
  • an outlet 26 connected to the HP exhaust 15 by a pipe 28 provided with an adaptation device 27.
  • This device is for example a pierced plate or a valve.
  • the adaptation member 27 the temperature distribution along the axis can be adjusted more precisely.
  • the members 27 By adjusting the members 27 differently, the cooling of the interstatoric space 19 can be adjusted. azimuth.
  • the vapor flow sweeping the interstatoric space optimally cools the internal 57 and external 9 stators, which makes it possible to have a low thermal gradient at the level of the internal body 57 as well as low temperatures of bolts and external stator. This makes it possible to have a smaller dimensioning of the bolts and of the external stator 9.
  • the tightness of the thermal protection device 10 protects the hot parts from any random entry of cold vapor coming from the exit from the HP vein.
  • the part of the internal stator 57 is coated in the vicinity of the inlet 12 of the HP stream 6 with a coating 29 of low thermal conductivity. Likewise, the part of the internal stator 57 in the vicinity of the inlet 18 of the vein MP 8 is provided with a coating 29 with low thermal conductivity.
  • the internal stator 57 in the vicinity of the thermal protection means 10 includes bosses 30. Lateral pipes 31, 32 and a radial pipe 33 are provided in each boss (see fig.4) .
  • the pipes 31, 32, 33 are supplied by a socket 34 located in the HP stream 6 and open into the interstatoric space 19 in the vicinity of the thermal protection means 10.
  • the bosses 30 are symmetrical with respect to the axis of the turbine.
  • the axial positioning means 11 consist of a first part 35 secured to the internal stator 57, resting on a part 36 secured to the external stator 9 between a support 37 and a counter-support 38.
  • Grooves 39 have been made in the part 35 and open into a cavity 40 of the part 36.
  • a chimney 41 opening into the cavity 40 is formed in the external stator 9.
  • Each chimney 41 is provided with a plunging pipe 42 serving to evacuate the steam to the flow control device 27 (figure 2). These pipes 42 protect the external stator 9 from too much convection.
  • each of these pipes 42 evacuates the steam to a flow adaptation device 27.
  • each of the adaptation devices 27 By adjusting each of the adaptation devices 27, it is possible to adjust the cooling in azimuth in the interstatoric space 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Turbines (AREA)
EP90107617A 1989-04-26 1990-04-23 Stator interne HP-MP unique de turbine à vapeur avec climatisation controlée Expired - Lifetime EP0394894B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905543 1989-04-26
FR8905543A FR2646466B1 (fr) 1989-04-26 1989-04-26 Stator interne hp-mp unique de turbine a vapeur avec climatisation controlee

Publications (2)

Publication Number Publication Date
EP0394894A1 EP0394894A1 (fr) 1990-10-31
EP0394894B1 true EP0394894B1 (fr) 1993-03-03

Family

ID=9381157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107617A Expired - Lifetime EP0394894B1 (fr) 1989-04-26 1990-04-23 Stator interne HP-MP unique de turbine à vapeur avec climatisation controlée

Country Status (17)

Country Link
US (1) US5149247A (es)
EP (1) EP0394894B1 (es)
JP (1) JPH02301604A (es)
KR (1) KR900016587A (es)
CN (1) CN1023505C (es)
AT (1) ATE86359T1 (es)
AU (1) AU634767B2 (es)
BR (1) BR9001921A (es)
CA (1) CA2015261A1 (es)
CS (1) CS210690A3 (es)
DE (1) DE69000984T2 (es)
DK (1) DK0394894T3 (es)
ES (1) ES2039985T3 (es)
FR (1) FR2646466B1 (es)
MX (1) MX172511B (es)
RU (1) RU1831578C (es)
ZA (1) ZA903191B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11560812B2 (en) 2018-11-13 2023-01-24 Siemens Energy Global GmbH & Co. KG Steam turbine and method for operating same

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FR2646466B1 (fr) * 1989-04-26 1991-07-05 Alsthom Gec Stator interne hp-mp unique de turbine a vapeur avec climatisation controlee
CA2039756A1 (en) * 1990-05-31 1991-12-01 Larry Wayne Plemmons Stator having selectively applied thermal conductivity coating
US5232592A (en) * 1991-04-03 1993-08-03 The F. B. Leopold Company, Inc. Cap for underdrains in gravity filters
DE19700899A1 (de) * 1997-01-14 1998-07-23 Siemens Ag Dampfturbine
US5904044A (en) * 1997-02-19 1999-05-18 White; William M. Fluid expander
DE19733148C1 (de) * 1997-07-31 1998-11-12 Siemens Ag Kühlluftverteilung in einer Turbinenstufe einer Gasturbine
EP0926316B1 (de) * 1997-12-24 2003-12-03 ALSTOM (Switzerland) Ltd Kombinierte Mehrdruck-Dampfturbine
CN1119505C (zh) 1999-10-29 2003-08-27 三菱重工业株式会社 带有改进的外壳冷却系统的汽轮机
ES2278821T3 (es) * 2002-02-06 2007-08-16 Siemens Aktiengesellschaft Turbomaquina con regiones de paletas de alta presion y de baja presion.
EP1378630A1 (de) * 2002-07-01 2004-01-07 ALSTOM (Switzerland) Ltd Dampfturbine
US7488153B2 (en) * 2002-07-01 2009-02-10 Alstom Technology Ltd. Steam turbine
EP1541810A1 (de) * 2003-12-11 2005-06-15 Siemens Aktiengesellschaft Verwendung einer Wärmedämmschicht für ein Bauteil einer Dampfturbine und eine Dampfturbine
CN100340740C (zh) * 2004-09-17 2007-10-03 北京全三维动力工程有限公司 一种超高压冲动式汽轮机
EP1744016A1 (de) * 2005-07-11 2007-01-17 Siemens Aktiengesellschaft Heissgasführendes Gehäuseelement, Wellenschutzmantel und Gasturbinenanlage
EP1744017A1 (de) * 2005-07-14 2007-01-17 Siemens Aktiengesellschaft Kombinierte Dampfturbine, Dampf- oder Gas- und Dampf- Turbinenanlage, Verfahren zum Betrieb einer kombinierten Dampfturbine
US8113764B2 (en) * 2008-03-20 2012-02-14 General Electric Company Steam turbine and a method of determining leakage within a steam turbine
EP2565419A1 (de) * 2011-08-30 2013-03-06 Siemens Aktiengesellschaft Kühlung für eine Strömungsmaschine
EP2565377A1 (de) * 2011-08-31 2013-03-06 Siemens Aktiengesellschaft Doppelflutige Dampfturbine
CN103174464B (zh) * 2011-12-22 2015-02-11 北京全四维动力科技有限公司 一种中部进汽双向流动结构的汽轮机转子冷却系统
US10428676B2 (en) * 2017-06-13 2019-10-01 Rolls-Royce Corporation Tip clearance control with variable speed blower
DE102017211295A1 (de) * 2017-07-03 2019-01-03 Siemens Aktiengesellschaft Dampfturbine und Verfahren zum Betreiben derselben
US10677092B2 (en) * 2018-10-26 2020-06-09 General Electric Company Inner casing cooling passage for double flow turbine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11560812B2 (en) 2018-11-13 2023-01-24 Siemens Energy Global GmbH & Co. KG Steam turbine and method for operating same

Also Published As

Publication number Publication date
CN1023505C (zh) 1994-01-12
KR900016587A (ko) 1990-11-13
RU1831578C (ru) 1993-07-30
DK0394894T3 (da) 1993-06-14
US5149247A (en) 1992-09-22
CS210690A3 (en) 1992-02-19
JPH02301604A (ja) 1990-12-13
FR2646466B1 (fr) 1991-07-05
DE69000984T2 (de) 1993-06-09
ES2039985T3 (es) 1993-10-01
MX172511B (es) 1993-12-17
AU634767B2 (en) 1993-03-04
BR9001921A (pt) 1991-07-30
AU5383090A (en) 1990-11-01
ATE86359T1 (de) 1993-03-15
ZA903191B (en) 1991-01-30
DE69000984D1 (de) 1993-04-08
FR2646466A1 (fr) 1990-11-02
CA2015261A1 (fr) 1990-10-26
EP0394894A1 (fr) 1990-10-31
CN1047552A (zh) 1990-12-05

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