EP1121509A1 - Turbine a vapeur comportant un boitier de vapeur d'echappement - Google Patents

Turbine a vapeur comportant un boitier de vapeur d'echappement

Info

Publication number
EP1121509A1
EP1121509A1 EP99955798A EP99955798A EP1121509A1 EP 1121509 A1 EP1121509 A1 EP 1121509A1 EP 99955798 A EP99955798 A EP 99955798A EP 99955798 A EP99955798 A EP 99955798A EP 1121509 A1 EP1121509 A1 EP 1121509A1
Authority
EP
European Patent Office
Prior art keywords
housing
steam
exhaust steam
jacket
turbine
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
EP99955798A
Other languages
German (de)
English (en)
Other versions
EP1121509B1 (fr
Inventor
Helmut Kuehn
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1121509A1 publication Critical patent/EP1121509A1/fr
Application granted granted Critical
Publication of EP1121509B1 publication Critical patent/EP1121509B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F01D25/30—Exhaust heads, chambers, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/61—Assembly methods using limited numbers of standard modules which can be adapted by machining

Definitions

  • the invention relates to a steam turbine with an exhaust steam housing.
  • a steam turbine is usually used in a power plant to drive a generator or in an industrial plant to drive a machine.
  • steam is supplied to the steam turbine as a flow medium, which relaxes in the steam turbine in a work-performing manner.
  • the steam After its expansion, the steam usually passes through an exhaust steam housing of the steam turbine into a downstream condenser and condenses there.
  • the exhaust housing can be flowed through axially or radially.
  • the condensate is then fed to a steam generator as feed water and, after its evaporation, returns to the steam turbine, so that a closed water-steam circuit is created.
  • the turbine housing of a steam turbine is usually composed of a plurality of housing sections, the structural dimensions of which are adapted to predetermined boundary parameters, such as the desired power size.
  • the housing sections can also be dimensioned for a suitable combination with other standard components.
  • the evaporation housing is usually arranged via a circumferential radial flange on the preceding housing section, also referred to as the inlet housing.
  • the annular diffuser formed by the exhaust steam housing is thus largely determined by the dimensions of the inlet housing. However, these can vary comparatively strongly depending on the predefined power size of the steam turbine and thus on the selected standard module for the inlet casing.
  • the dimension of the circular ring diffuser on the steam outlet side is determined by the connection diameter of the downstream condenser, which in turn is chosen uniformly for reasons of standardization, as a rule, regardless of the steam turbine output.
  • the adaptation of the exhaust steam housing and the annular diffuser formed in the process to a combination of a standard module for the inlet housing and a standard module for the condenser, which is ultimately determined by the power size of the steam turbine, can thus be comparatively complex, especially since due to the functionality as a diffuser the design of the flow path requires special attention to dedicate is.
  • Such a complex adaptation can largely compensate for the advantages that can be achieved by modularizing and / or standardizing the components.
  • the invention is therefore based on the object of specifying a steam turbine with an exhaust steam housing and with a turbine runner arranged in an exhaust bearing arranged within the exhaust steam housing and surrounded by an inner hub, in which the exhaust steam housing can be combined with various combinations of particularly simple means while maintaining favorable flow properties of the exhaust steam Entry housing and condenser is customizable.
  • the outer jacket of the exhaust steam housing comprises a first, cylindrical jacket-shaped jacket part, which is connected via a stiffening ring to a second, conical jacket-shaped jacket part, a conical jacket-shaped guide element for guiding the exhaust steam flow within the outer jacket on the stiffening ring is arranged, and in that the inner hub comprises a first, substantially conical jacket-shaped hub part and a second, essentially cylindrical-cylindrical hub part.
  • the invention is based on the consideration that for a particularly simple adaptation of the exhaust steam housing to any combination of inlet housing and condenser, extensive use of standard components should be provided while ensuring a high degree of flexibility in the design of the flow channel.
  • the cylindrical jacket-shaped first and the conical jacket-shaped second jacket part are provided as standard components.
  • the first casing part is provided for a connection to the radial flange of the inlet housing, which can be made in standard dimensions regardless of the size of the steam turbine.
  • the second part of the jacket is for the connection to the capacitor is provided and in accordance with its usually standardized dimensioning also carried out in standard dimensions.
  • the cone-shaped design of the second jacket part favors its use in the diffuser area.
  • the guide element together with the second jacket part in the outer region and the inner hub in the inner region form a diffuser with an annular cross section, which can be designed in a simple manner for particularly favorable flow behavior, in particular by suitable dimensioning of the first, cone-shaped hub part.
  • the performance-dependent adjustment is then carried out in a comparatively simple manner by the conical jacket-shaped guide element which is arranged within the first jacket part and limits the inflow cross section for the steam to the selected outlet cross section of the upstream inlet housing.
  • the guide element expediently extends on the inlet side to the last row of moving blades as seen in the flow direction of the exhaust steam. In this way, a fluidically particularly favorable transition from the inlet housing into the outflow area can be achieved, so that the diffuser function is ensured in a particularly reliable manner.
  • first and second jacket parts of the outer jacket allow the evaporation housing to be connected to both the upstream inlet housing and the downstream condenser in a particularly simple manner via standard components, with an adaptation being made by the guide element to the entry housing that is specifically selected depending on the required output size.
  • the guiding element also achieves a flow-technically favorable shaping of the flow area, and in combination with the cone-shaped hub part of the inner hub, even with varying flow geometry of the inlet housing, a reliably acting circular ring diffuser can be formed.
  • FIG. 1 An embodiment of the invention is explained in more detail with reference to a drawing.
  • the figure schematically shows a steam turbine in longitudinal section.
  • the steam turbine 1 according to the figure comprises an exhaust steam housing 2, through which steam expanded in the steam turbine 1 can be fed in the axial outflow direction to a condenser, not shown in the figure, which is connected downstream of the steam turbine 1.
  • the steam turbine 1 is provided for use as an industrial turbine and is designed for a mechanical output of approximately 6 to 8 MW.
  • the steam turbine 1 can also be provided for use as a power plant turbine with a comparatively higher mechanical output.
  • a final bearing 4, designed as a radial bearing, for the turbine rotor 6 of the steam turbine 1 is arranged inside the exhaust steam housing 2.
  • the turbine rotor 6 is also mounted in a number of further bearings 8 designed as radial and / or axial bearings so as to be rotatable about its central axis 10.
  • the end bearing 4 arranged in an inner hub 12 comprises bearing parts 14, 16 which together form a bearing housing for the actual bearing 18 of the end bearing 4. Further details regarding the design of the final bearing 4 and the associated sealing arrangement can also be seen in the figure; for the sake of clarity, however, they are not discussed here.
  • Arranged on the turbine rotor 6 are a number of rotor blades 20 which are combined into blade groups and which, together with stationary guide vanes 22, convert kinetic energy of the steam flowing through the steam turbine 1 into rotational energy of the turbine rotor 6.
  • the turbine rotor 6 is surrounded in a front area 24 by an inlet housing 26, on which a steam collecting space 28 is arranged for the inlet of steam into the steam turbine 1.
  • High-pressure steam reaches the interior of the inlet housing and thus the region of the moving blades 20 and the guide blades 22 via the steam collecting space 28, where it relaxes while performing work.
  • the turbine rotor 6 is surrounded by the exhaust steam housing 2, which is connected directly to the inlet housing 26 via a circumferential radial flange 32.
  • the steam turbine 1 is manufactured using a large number of standardized components. Both the radial flange 32 and a connecting flange (not shown in detail) of the downstream capacitor are dimensioned using standard dimensions.
  • the exhaust steam housing 2 has an outer jacket 34 which comprises a first, jacket-shaped jacket part 36.
  • the jacket part 36 is adapted to the radial flange 32 with regard to its dimensions, in particular with regard to its diameter, and is connected directly to the latter.
  • the jacket part 36 is connected on the steam outlet side via a circumferential stiffening ring 38 to a second, conical jacket-shaped jacket part 40, which in turn is directly connected to the steam outlet side via a circumferential radial flange 42 the connecting flange of the capacitor is connected.
  • Radial flange 42 is also standardized in terms of its dimensions and adapted to the standard dimensions of the connecting flange of the capacitor.
  • the steam turbine 1 is designed in a modular design and, by choosing a suitable module for the inlet housing 26, is adapted to a predetermined output size.
  • the adaptation to the output size is carried out while maintaining the standardized dimensions for the radial flange 32 by a suitable choice of the internal geometry, for example of the inlet housing 26.
  • a cone-shaped inside the outer casing 34 on the stiffening ring 38 Guide element 44 arranged to guide the exhaust steam flow.
  • the guide element 44 extends on the inlet side as far as the last row 46 of the rotor blades 20, as seen in the flow direction of the exhaust steam, and thereby forms a radial seal of the rotor blades 20 of the last row 46 to the outer casing 34 Even if the stiffening ring 38 has a predetermined and thus standardized diameter, it is possible to adapt the flow space in the evaporation housing to the specific internal geometry of the inlet housing 26 in a particularly simple manner.
  • the inner hub surrounding the end bearing 4 comprises a first, essentially conical jacket-shaped hub part 48.
  • a second, essentially cylindrical jacket-shaped hub part 50 is provided for forming the inner hub 12.
  • the circular ring diffuser of the axial outflow housing 2 is thus outside of the guide element 44 and the subsequent second jacket part 40 and internally from the first, cone-shaped hub part 48 and then from the second, cylindrical jacket-shaped hub part 50.
  • the end bearing 4, together with the inner hub 12, is held by a support 52, which is guided through the evaporation housing 2 in a lower region and is supported on a foundation block (not shown in any more detail).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne une turbine à vapeur (1) comportant un boîtier de vapeur d'échappement (2). L'invention vise à permettre d'adapter ledit boîtier de vapeur d'échappement (2), avec des moyens particulièrement simples, tout en garantissant des propriétés d'écoulement favorables de la vapeur d'échappement, à différentes combinaisons d'un boîtier d'entrée (26) monté en amont du boîtier de vapeur d'échappement (2) et d'un condenseur. A cet effet, l'enveloppe extérieure (34) du boîtier de vapeur d'échappement (2) comprend une première partie cylindrique (36) solidarisée par l'intermédiaire d'un anneau de renforcement (38) à une seconde partie conique (40). Pour guider le flux de vapeur d'échappement dans l'enveloppe extérieure (34), il est prévu un élément de guidage conique (44) sur l'anneau de renforcement (38).
EP99955798A 1998-10-07 1999-09-24 Turbine a vapeur comportant un boitier de vapeur d'echappement Expired - Lifetime EP1121509B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19846224 1998-10-07
DE19846224A DE19846224A1 (de) 1998-10-07 1998-10-07 Dampfturbine mit einem Abdampfgehäuse
PCT/DE1999/003080 WO2000020727A1 (fr) 1998-10-07 1999-09-24 Turbine a vapeur comportant un boitier de vapeur d'echappement

Publications (2)

Publication Number Publication Date
EP1121509A1 true EP1121509A1 (fr) 2001-08-08
EP1121509B1 EP1121509B1 (fr) 2003-06-18

Family

ID=7883719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99955798A Expired - Lifetime EP1121509B1 (fr) 1998-10-07 1999-09-24 Turbine a vapeur comportant un boitier de vapeur d'echappement

Country Status (4)

Country Link
US (1) US6406252B2 (fr)
EP (1) EP1121509B1 (fr)
DE (2) DE19846224A1 (fr)
WO (1) WO2000020727A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7731475B2 (en) * 2007-05-17 2010-06-08 Elliott Company Tilted cone diffuser for use with an exhaust system of a turbine
US20110088379A1 (en) * 2009-10-15 2011-04-21 General Electric Company Exhaust gas diffuser
US9249687B2 (en) 2010-10-27 2016-02-02 General Electric Company Turbine exhaust diffusion system and method
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
US9970322B2 (en) * 2013-03-13 2018-05-15 United Technologies Corporation Engine mounting system
US9617873B2 (en) * 2014-09-15 2017-04-11 Siemens Energy, Inc. Turbine exhaust cylinder / turbine exhaust manifold bolted stiffening ribs
KR101914870B1 (ko) * 2017-06-28 2018-12-28 두산중공업 주식회사 가스터빈의 분해 및 조립방법과 이에 의해 조립된 가스터빈
CN114508388B (zh) * 2021-12-29 2023-07-18 东方电气集团东方汽轮机有限公司 一种双排汽联合汽阀导流结构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1034509A (fr) * 1975-10-14 1978-07-11 John Korta Commande de roue a aubes pour turbine a gaz
JPS61160502A (ja) * 1985-01-09 1986-07-21 Fuji Electric Co Ltd タ−ビンケ−シングの流れガイド取付方法
CH672004A5 (fr) * 1986-09-26 1989-10-13 Bbc Brown Boveri & Cie
DE4425353C2 (de) * 1994-07-18 2001-10-18 Abb Patent Gmbh Baukastensystem mit standarisierten Teilen zur Erstellung einer Dampfturbine
US5494405A (en) * 1995-03-20 1996-02-27 Westinghouse Electric Corporation Method of modifying a steam turbine
CZ292470B6 (cs) * 1997-05-21 2003-09-17 Siemens Aktiengesellschaft Parní turbosoustrojí

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0020727A1 *

Also Published As

Publication number Publication date
DE59906036D1 (de) 2003-07-24
US6406252B2 (en) 2002-06-18
EP1121509B1 (fr) 2003-06-18
US20010031200A1 (en) 2001-10-18
DE19846224A1 (de) 2000-04-20
WO2000020727A1 (fr) 2000-04-13

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