EP0751283A2 - Support pour turbine à vapeur à basse pression - Google Patents

Support pour turbine à vapeur à basse pression Download PDF

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Publication number
EP0751283A2
EP0751283A2 EP96810367A EP96810367A EP0751283A2 EP 0751283 A2 EP0751283 A2 EP 0751283A2 EP 96810367 A EP96810367 A EP 96810367A EP 96810367 A EP96810367 A EP 96810367A EP 0751283 A2 EP0751283 A2 EP 0751283A2
Authority
EP
European Patent Office
Prior art keywords
pressure steam
outer housing
low
steam turbine
concrete foundation
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.)
Granted
Application number
EP96810367A
Other languages
German (de)
English (en)
Other versions
EP0751283B1 (fr
EP0751283A3 (fr
Inventor
Heinrich Lageder
Urs Ritter
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.)
General Electric Switzerland GmbH
Original Assignee
ABB Management AG
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 ABB Management AG filed Critical ABB Management AG
Publication of EP0751283A2 publication Critical patent/EP0751283A2/fr
Publication of EP0751283A3 publication Critical patent/EP0751283A3/fr
Application granted granted Critical
Publication of EP0751283B1 publication Critical patent/EP0751283B1/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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • 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
    • 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

Definitions

  • the invention relates to a low-pressure steam turbine connected to a condenser.
  • a double-casing low-pressure steam turbine which mainly consists of an inner casing with the turbine rotor and an outer casing with an evaporation chamber.
  • the outer housing is divided into two parts, ie it has an upper and a lower part.
  • the outer housing lower part is designed as an empty steel casing and arranged in a recess in the concrete foundation.
  • the capacitor connects to the lower end of the lower part of the housing. Both the parting plane of the two housing parts and the capacitor connection are part of the foundation.
  • the bearings for the rotor are above the parting plane, ie above the foundation table.
  • EP-A1-03 84 200 discloses a steam condenser in a ground-level installation next to the steam turbine, which is connected to the steam turbine via an exhaust hood.
  • the steam escapes above the foundation.
  • both the overall height of the machine house and that of the turbine foundation can be greatly reduced.
  • the condenser is supported separately from the steam turbine on simple glide shoes, which reduces the load on the concrete foundation.
  • a disadvantage of this solution is that a very large evaporation hood is required for the low-pressure steam turbine to cope with the exhaust steam volume flow, which requires a relatively large installation space. This increases both the manufacturing costs and the assembly effort.
  • the steam flow must be diverted from the lower part of the housing into the exhaust hood, which results in a pressure loss and thus a lower efficiency.
  • relatively large horizontal forces act on the evaporation hood of the low-pressure steam turbine, which must be transferred to the foundation in a suitable manner. This in turn increases the manufacturing costs of the steam turbine.
  • the invention tries to avoid all these disadvantages. It is based on the task of increasing the efficiency of a low-pressure steam turbine connected to a condenser and reducing its production costs.
  • the parting plane of the upper and lower part of the outer housing is at the axis height of the turbine rotor and the concrete foundation extends to the parting plane. Both the lower part of the outer casing and the bearing points of the turbine rotor are fixed in the concrete foundation.
  • the outer casing is open at least on one side, the opening (s) being / are arranged at right angles and horizontally to the axis of the turbine rotor. If there is only one lateral opening of the outer housing, one capacitor is connected, and if there are two lateral openings, one capacitor is connected.
  • the upper part of the outer housing consists of an assembly hood and a frame part which is connected to the lower part and the capacitor in a material or non-positive manner.
  • the assembly hood is non-positively or positively connected both to the lower part of the outer housing and to the frame part, the latter being arranged between the condenser and the assembly hood.
  • a frame part is formed on both sides.
  • both the lower part and the bearing points of the turbine rotor are cast with the foundation when it is manufactured on site.
  • the concrete foundation itself takes over the operating forces of the low-pressure steam turbine and the condenser (s) connected to it, and can therefore be used optimally.
  • the condenser attached to the side and at the same height of the low-pressure steam turbine can be connected to the exhaust chamber in the area of the entire opening. Is the outer casing on both sides Open, both condensers are connected to the evaporation chamber in the same way. In both versions, the steam flow reaches the condenser directly and without having to be redirected again. The pressure loss is thus reduced and the efficiency is improved compared to the prior art.
  • Each frame part connected to a capacitor and the outer housing lower part in a material or non-positive manner serves to stiffen the outer housing upper part. Due to the non-positive connection of the hood, which closes off the evaporation chamber at the top, to the frame part and the lower housing part, the hood can be designed as an assembly hood. It is therefore much lighter and simpler than the evaporation hoods of the prior art. In addition, the assembly hood ensures better access to the internal components of the low-pressure steam turbine. A welded sheet steel construction of the assembly hood is also possible. As a result, the manufacturing costs and the assembly costs of the steam turbine are further reduced.
  • the lower part of the outer casing and the bearing points are integrated into the concrete foundation as soon as it is created.
  • the frame part or the frame parts of the upper part are connected to the lower part of the outer housing in a material or non-positive manner. Only the inner housing with the turbine rotor and the assembly hood are designed as loose parts.
  • the pre-assembled compact unit consisting of the foundation, outer casing (lower part and frame part / s) and bearing points is finally only completed by the components already mentioned. This results in a particularly low installation effort and low manufacturing costs.
  • two or more, analog, low-pressure steam turbines can also be connected to one another.
  • the bearing points of high-pressure or medium-pressure steam turbines connected to the low-pressure steam turbine to form a turbo group can be designed in the same way as the bearing points of the low-pressure steam turbine.
  • the low-pressure steam turbine which is set up at ground level, has a double casing, i.e. its housing essentially consists of an outer housing 1 and an inner housing 2, which are arranged separately from one another. As a result, the mass and movement forces of the outer housing 1 cannot act on the inner housing 2 and vice versa.
  • An evaporation chamber 3 is formed between the outer and inner housings 1, 2.
  • a turbine rotor 4 is arranged in the inner housing 2 and is connected in a rotationally fixed manner to a shaft end part 5.
  • the two-part outer housing 1 consists of an upper and a lower part 6, 7, the parting plane 8 of which is at the level of the axis 9 of the turbine rotor 4.
  • a bearing point 10 with corresponding support bearings 11 for the turbine rotor 4 is formed on both sides of the turbine rotor 4 (FIG. 1).
  • the outer housing 1 has a housing bushing 12 on both sides for the shaft end part 5 of the turbine rotor 4. In the area of each housing bushing 12, an encapsulated shaft seal 13 is arranged on the shaft end part 5, which seals off the evaporation chamber 3 to the outside.
  • the low-pressure steam turbine is received by a concrete foundation 14, which has a recess 15 for this purpose.
  • the lower part 7 of the outer casing 1 is designed as a steel casing of the concrete foundation 14 reaching to the parting plane 8 of the outer casing 1. Both the lower part 7 of the outer housing 1 and the bearing points 10 of the turbine rotor 4 are thus fixed in the concrete foundation 14 (FIG. 1, FIG. 2).
  • a condenser 16 is arranged and connected to the evaporation chamber 3.
  • the condenser 16 like the steam turbine, is at ground level set up.
  • the outer casing 1 of the low-pressure steam turbine is designed to be open on one side at right angles and horizontally to the axis 9 of the turbine rotor 4.
  • the capacitor 16 connects to the opening 17 of the outer housing 1 (FIG. 2).
  • the lower part 7 of the outer housing 1 has a U-shape in plan view, which is open towards the capacitor 16 (FIG. 3).
  • a plurality of vertical, outer casing ribs 18 are arranged on the lower part 7, as a result of which a stable connection to the concrete foundation 14 is achieved.
  • the shuttering ribs 18 can of course also be oriented differently.
  • the upper part 6 of the outer housing 1 is formed by a mounting hood 19 and a frame part 20 which is integrally connected to the lower part 7 and the capacitor.
  • the assembly hood 19 completely closes the evaporation chamber 3 above the parting plane 8. It consists of a welded sheet steel construction with two end walls 21 and stiffeners 22 and of a vertical and a horizontal connecting flange 23, 24.
  • an inlet connection 25 is fastened, via which the steam is fed from the medium-pressure steam turbine, not shown.
  • the frame part 20 is bow-shaped and welded to the capacitor 16 and to the lower part 7 of the outer housing 1 (FIG. 2). It is at least partially hollow in its interior and is cast simultaneously with the lower part 7 of the outer casing 1 during the manufacture of the concrete foundation 14. Of course, it can also only be welded. A positive connection using screws is also possible.
  • the frame part 20 carries the mounting hood 19 and is a link between it and the capacitor 16. For this purpose, it is screwed to the mounting hood 19 via the vertical connecting flange 23. However, another non-positive or positive connection can also be selected.
  • a sealing strip is welded to the horizontal connecting flange 24. Another sealing strip is arranged between the vertical connecting flange 23 and the frame part 20. Of course, other suitable sealants can also be used.
  • a bearing saddle 26 is embedded in the concrete foundation 14 and anchored to it.
  • the bearing saddle 26 receives an oil pan 27, which is connected to an oil drain line 28 integrated in the concrete foundation 14.
  • the support bearing 11 is arranged in the bearing saddle 26 and secured against vertical movements (FIG. 1).
  • the bearing point 10 is covered with a housing cover 29.
  • the inner housing 2 of the low-pressure steam turbine is supported on four supports 31 and guided in the axial direction via two guides 32.
  • the guides 32 are connected to the concrete foundation 14 and adjustable transversely to the axis 9 of the turbine rotor 4 (FIG. 4).
  • Both the lower part 7 of the outer casing 1 and the bearing points 10 of the turbine rotor 4 are already integrated when the concrete foundation 14 is created.
  • the concrete foundation 14 is formed up to the level of the parting plane 8 of the lower and upper part 7, 6 of the outer housing 1.
  • the frame part 20 which is also filled with concrete, is welded to the capacitor 16 and the lower part 7 of the outer housing 1.
  • this pre-assembled, compact unit is only left through the inner housing 2 with the turbine rotor 4 and completed by the assembly hood 19. This makes it possible to also pre-assemble the inner housing 2 and the turbine rotor 4, to transport them together and finally to use them together in the prepared concrete foundation 14. This results in a particularly low installation effort and low manufacturing costs.
  • the steam flow from the medium-pressure steam turbine is introduced into the inner casing 2 via the inlet connection 25. It drives the turbine rotor 4 and is relaxed down to the evaporation pressure. Finally, the steam passes directly through the evaporation chamber 3 and the opening 17 of the outer housing 1, i.e. without having to be redirected again, into the capacitor 16 and is deposited there.
  • two condensers 16 are connected to the low-pressure steam turbine.
  • the outer housing 1 has a lateral opening 17 arranged on both sides at right angles and horizontally to the axis 9 of the turbine rotor 4.
  • a capacitor 16 is connected to each opening 17 and connected to a frame part 20 and the lower part 7 of the outer housing 1 (not shown). All other components are designed and arranged essentially analogously to the illustrated embodiment.
  • the invention is not limited to the exemplary embodiment described and illustrated with a low-pressure steam turbine.
  • two or more, analog, low-pressure steam turbines can be connected to one another.
  • the bearing points of high-pressure or medium-pressure steam turbines connected to the low-pressure steam turbine to form a turbo group can also be designed in the same way as the bearing points 10 of the low-pressure steam turbine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP96810367A 1995-06-30 1996-06-06 Support pour turbine à vapeur à basse pression Expired - Lifetime EP0751283B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19523923A DE19523923C2 (de) 1995-06-30 1995-06-30 Niederdruck-Dampfturbine
DE19523923 1995-06-30

Publications (3)

Publication Number Publication Date
EP0751283A2 true EP0751283A2 (fr) 1997-01-02
EP0751283A3 EP0751283A3 (fr) 1999-03-24
EP0751283B1 EP0751283B1 (fr) 2002-10-02

Family

ID=7765726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810367A Expired - Lifetime EP0751283B1 (fr) 1995-06-30 1996-06-06 Support pour turbine à vapeur à basse pression

Country Status (4)

Country Link
US (1) US5779435A (fr)
EP (1) EP0751283B1 (fr)
JP (1) JP3863596B2 (fr)
DE (2) DE19523923C2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046789A1 (fr) 1999-04-22 2000-10-25 Asea Brown Boveri AG Structure de support pour une turbine à vapeur et sa méthode de construction
EP2551471A1 (fr) * 2010-07-16 2013-01-30 Mitsubishi Heavy Industries, Ltd. Procédé et appareil permettant de fixer une boîte de roulement
EP2832959A1 (fr) * 2013-08-01 2015-02-04 Siemens Aktiengesellschaft Boîtier, notamment boîtier extérieur pour une turbine à vapeur à basse pression
CN106499451A (zh) * 2016-11-01 2017-03-15 东方电气集团东方汽轮机有限公司 一种汽轮机低压缸结构
US9726045B2 (en) 2011-01-19 2017-08-08 Mitsubishi Hitachi Power Systems, Ltd. Turbine external compartment, frame for turbine external compartment, and method of constructing frame for turbine external compartment

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19715492C2 (de) * 1997-04-14 1999-08-12 Siemens Ag Dampfturbinenanlage
DE19755981B4 (de) * 1997-12-17 2005-09-15 Alstom Dampfturbinenanlage
US6971842B2 (en) * 2003-09-22 2005-12-06 General Electric Company Low pressure steam turbine exhaust hood
DE502005011027D1 (de) 2005-03-23 2011-04-14 Siemens Ag Rohrdurchführung und Verfahren zum Durchführen eines Mediums durch eine Trennwand
US7640724B2 (en) * 2006-01-25 2010-01-05 Siemens Energy, Inc. System and method for improving the heat rate of a turbine
EP2372111A1 (fr) * 2010-03-27 2011-10-05 Alstom Technology Ltd Turbine à basse pression avec deux systèmes de condensation indépendants
CN102242646B (zh) * 2010-05-13 2014-09-03 上海电气电站设备有限公司 汽轮机的低压外缸下半的低压钢架的布置结构
JP2012112359A (ja) * 2010-11-26 2012-06-14 Toshiba Corp 軸流排気タービンの軸受台カバーおよび軸流排気タービン
US8821110B2 (en) * 2011-05-05 2014-09-02 General Electric Company Support arrangement for a steam turbine LP inner casing
CN104204415B (zh) * 2012-03-20 2016-11-16 通用电器技术有限公司 低压蒸汽涡轮密封布置
ES2635107T3 (es) 2013-02-05 2017-10-02 General Electric Technology Gmbh Central termoeléctrica de vapor con una segunda turbina de baja presión y un sistema de condensación adicional y procedimiento para la operación de dicha central termoeléctrica de vapor
JP6087803B2 (ja) * 2013-12-25 2017-03-01 三菱重工業株式会社 蒸気タービン
JP5766835B2 (ja) * 2014-02-24 2015-08-19 三菱日立パワーシステムズ株式会社 タービン外部車室用架台の施工方法
JP6235502B2 (ja) * 2015-01-27 2017-11-22 三菱日立パワーシステムズ株式会社 蒸気タービン設備
JP6817795B2 (ja) * 2016-11-24 2021-01-20 株式会社東芝 蒸気タービン
JP6755783B2 (ja) * 2016-11-24 2020-09-16 株式会社東芝 蒸気タービン
JP6884660B2 (ja) * 2017-07-13 2021-06-09 三菱パワー株式会社 蒸気タービンシステム
JP6833745B2 (ja) * 2018-03-06 2021-02-24 株式会社東芝 蒸気タービン
JP7330084B2 (ja) * 2019-12-11 2023-08-21 株式会社東芝 蒸気タービン
CN112459848A (zh) * 2020-11-23 2021-03-09 东方电气集团东方汽轮机有限公司 一种方便纯凝背压切换的三缸三排汽汽轮机及其切换方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4866941A (en) * 1988-07-05 1989-09-19 Westinghouse Electric Corp. Single condenser arrangement for side exhaust turbine
US5094588A (en) * 1989-08-28 1992-03-10 Gec Alsthom Sa Concrete steam condenser for an axial exhaust turbine and turbine provided with same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034924B (de) * 1953-08-21 1958-07-24 Sulzer Ag Gasturbine mit verripptem Gehaeuse
US3520634A (en) * 1966-12-02 1970-07-14 Bbc Brown Boveri & Cie Exhaust steam housing for low pressure steam turbines
SE335994B (fr) * 1970-04-13 1971-06-21 Asea Atom Ab
US3628884A (en) * 1970-06-26 1971-12-21 Westinghouse Electric Corp Method and apparatus for supporting an inner casing structure
FR2583458B1 (fr) * 1985-06-14 1987-08-07 Alsthom Atlantique Dispositif de liaison entre une turbine a vapeur et un condenseur.
EP0384200B1 (fr) * 1989-02-23 1993-09-22 Asea Brown Boveri Ag Condenseur à vapeur
EP0575642B1 (fr) * 1992-06-20 1997-01-22 Asea Brown Boveri Ag Carter extérieur d'une turbine à vapeur basse pression
FR2697053B1 (fr) * 1992-10-21 1994-12-09 Alsthom Gec Condenseur en béton pour turbine à vapeur à échappement axial avec montage simplifié des faisceaux.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4866941A (en) * 1988-07-05 1989-09-19 Westinghouse Electric Corp. Single condenser arrangement for side exhaust turbine
US5094588A (en) * 1989-08-28 1992-03-10 Gec Alsthom Sa Concrete steam condenser for an axial exhaust turbine and turbine provided with same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046789A1 (fr) 1999-04-22 2000-10-25 Asea Brown Boveri AG Structure de support pour une turbine à vapeur et sa méthode de construction
EP2551471A1 (fr) * 2010-07-16 2013-01-30 Mitsubishi Heavy Industries, Ltd. Procédé et appareil permettant de fixer une boîte de roulement
EP2551471A4 (fr) * 2010-07-16 2014-12-17 Mitsubishi Heavy Ind Ltd Procédé et appareil permettant de fixer une boîte de roulement
US9726045B2 (en) 2011-01-19 2017-08-08 Mitsubishi Hitachi Power Systems, Ltd. Turbine external compartment, frame for turbine external compartment, and method of constructing frame for turbine external compartment
EP2666975A4 (fr) * 2011-01-19 2017-12-20 Mitsubishi Hitachi Power Systems, Ltd. Compartiment externe de turbine, ossature pour compartiment externe de turbine, et procédé de construction d'ossature pour compartiment externe de turbine
EP2832959A1 (fr) * 2013-08-01 2015-02-04 Siemens Aktiengesellschaft Boîtier, notamment boîtier extérieur pour une turbine à vapeur à basse pression
WO2015014681A1 (fr) * 2013-08-01 2015-02-05 Siemens Aktiengesellschaft Carter, en particulier carter extérieur pour une turbine à vapeur à basse pression
CN105378233A (zh) * 2013-08-01 2016-03-02 西门子股份公司 壳体、特别是用于低压汽轮机的外壳体
CN106499451A (zh) * 2016-11-01 2017-03-15 东方电气集团东方汽轮机有限公司 一种汽轮机低压缸结构

Also Published As

Publication number Publication date
EP0751283B1 (fr) 2002-10-02
DE59609737D1 (de) 2002-11-07
DE19523923A1 (de) 1997-01-02
JPH0913913A (ja) 1997-01-14
DE19523923C2 (de) 2003-09-18
US5779435A (en) 1998-07-14
JP3863596B2 (ja) 2006-12-27
EP0751283A3 (fr) 1999-03-24

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