EP1206627B1 - Turbine et procede pour evacuer du fluide de fuite - Google Patents

Turbine et procede pour evacuer du fluide de fuite Download PDF

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Publication number
EP1206627B1
EP1206627B1 EP00956463A EP00956463A EP1206627B1 EP 1206627 B1 EP1206627 B1 EP 1206627B1 EP 00956463 A EP00956463 A EP 00956463A EP 00956463 A EP00956463 A EP 00956463A EP 1206627 B1 EP1206627 B1 EP 1206627B1
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EP
European Patent Office
Prior art keywords
turbine
fluid
rotor
area
leakage fluid
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
EP00956463A
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German (de)
English (en)
Other versions
EP1206627A1 (fr
Inventor
Stefan Sasse
Rainer Tamme
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP00956463A priority Critical patent/EP1206627B1/fr
Publication of EP1206627A1 publication Critical patent/EP1206627A1/fr
Application granted granted Critical
Publication of EP1206627B1 publication Critical patent/EP1206627B1/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
    • F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
    • F01D3/04—Machines or engines with axial-thrust balancing effected by working-fluid axial thrust being compensated by thrust-balancing dummy piston or the like
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam

Definitions

  • the invention relates to a turbine, in particular one Steam turbine with a rotor, which has a blading area for moving blades and a thrust compensation piston which thrust compensating piston has the blading area hot side facing and the blading area facing away from the cold side.
  • the invention further relates to a procedure for the transfer of over Leaking fluid flowing through the thrust compensation piston.
  • German utility model 6809708 from 03.12.1968 is a multi-shell axial, throttle-controlled steam turbine for described high pressures and temperatures.
  • the steam turbine here has an inner housing part and a guide vane carrier on, which into a single, divided in the axis plane Inner shell are structurally summarized.
  • the inner shell is surrounded by a pot-shaped outer casing.
  • the inner shell in turn encloses a turbine shaft, also called rotor, which is a blading area with blades.
  • rotor also called rotor, which is a blading area with blades.
  • On each of the opposite The ends of the rotor are shaft seals provided between the rotor and the outer housing.
  • German patent 281 253 is a facility specified to relieve a ship's turbine.
  • the turbine has a forward and a backward turbine with equal pressure and overpressure sets in a single Housing are housed and by a drum wall are relieved. There is a subdivided to relieve the turbine Relief area between the forward turbine and provided a shaft bearing. This will both Forward and reverse when the ship is moving Relief of the shovel thrust and the thrust of the Ship propellers enabled.
  • German published patent application DE 197 01 020 there is one Steam turbine with a high pressure and a medium pressure turbine with one that changes across the turbine stages Degree of reaction described.
  • the medium and high pressure turbine section can be housed in a single housing be, with each of the sub-turbines then single-flow is executed.
  • a Thrust compensation piston provided. This is between one Shaft bearings and the high-pressure turbine part arranged. At the the thrust compensating piston becomes the side assigned to the shaft bearing with steam from the exhaust steam area of the medium pressure turbine and on the associated with the high pressure turbine section Side with steam from the exhaust steam area of the high-pressure turbine section applied.
  • the partial turbines can also be housed in two separate housings. With single flow Execution is then also a thrust compensation piston intended.
  • the object of the invention is a turbine with a thrust compensation arrangement for high temperatures the turbine to specify driving working medium.
  • Another job the invention is a method for removal of leakage steam in a thrust compensation arrangement.
  • the task directed to a turbine solved by a turbine with a rotor, which a blading area for moving blades and one Thrust compensation piston, which thrust compensation piston a hot side facing the blading area and a cold side facing away from the blading area has, and with a mixing area in which one of the cold side assigned supply for sealing fluid and one with the Blading area fluidically connected leakage fluid supply flow and from which a discharge line branches.
  • a thrust compensation arrangement is located under a thrust compensation piston understood that mechanically with the Rotor of the turbine is connected, for example with this is made in one piece, in particular forged or cast, or welded to it, screwed or is otherwise mechanically firmly connected.
  • the thrust compensating piston has areas that are marked by a Medium, such as steam or gas, can be charged, so that in A total force is generated on the thrust compensation piston the direction of the working medium towards the rotor its axis of rotation imposed thrust against is.
  • a fluidic connection between two parts or two areas means that a fluid from one area (Part) can flow to the other.
  • a fluidic Connection is e.g. B. via a fluid line, an opening or something similar.
  • the invention is based on the consideration that the Thrust compensating piston, hereinafter referred to as the piston, with working medium came into contact.
  • This working medium can between the piston and a fixed turbine part, for example, an inner casing. hereby there is a leakage flow of the working medium.
  • This Leakage flow can be reduced through seals; a complete seal is non-contact Seals not possible.
  • the leakage flow can be high temperatures have, with steam turbines up to 600 C and Gas turbines even higher. The hot leak steam flow can thus encounter turbine parts that are not for such high Temperatures are designed. To avoid this you would have to also turbine parts outside the flow range of the hot working medium with for such high temperatures suitable, often expensive and difficult to process Materials.
  • a suction device be provided for suction of the leakage flow.
  • leakage current through the piston would be reversed proportional to the flow resistance of the additional Sealing area and that contained in the suction device Suction pipes.
  • the invention is a mixing of the hot leakage fluid provided with a colder sealing fluid so that after mixing the two fluids, a fluid mixture is present.
  • the fluid mixture can then be removed from the Exit the mixing area. This ensures that controls the colder fluid mixture compared to the leakage fluid is discharged into corresponding turbine areas.
  • the leakage fluid is complete Sealing of the piston reached.
  • a leakage flow outside the piston, e.g. B. along the rotor, is thereby safely avoided.
  • the temperature of the fluid mixture is preferably below the permissible operating temperature of turbine parts outside the flow range of the hot working medium.
  • the mixing area is preferably on the cold side of the piston arranged. This allows between the hot side of the Piston and the mixing area in the leakage fluid supply Sealing area, for example with a non-contact Seal should be provided.
  • a conveying device is preferably on the cold side of the piston to generate a radially outward Flow of the sealing fluid is provided, the conveying device fluidic with the supply for sealing fluid connected is.
  • the conveyor device a plurality of flow guide elements, such as radial grooves, radial bores, baffles or equivalent Shapes and geometries.
  • Such a conveyor represents a centrifugal fan.
  • funding is provided with the conveyor device of the sealing fluid in the direction of the mixing area by the rotation of the rotor. So without further ado Additional devices the sealing fluid in the mixing area. A flow of the Sealing fluid is therefore preferred to the flow of the leakage fluid opposite direction.
  • the conveyor device with the thrust compensation piston is preferred made in one piece.
  • they are Flow guide elements on the cold side of the piston welded or fastened there in a similar manner.
  • the turbine is preferably a steam turbine, in particular a medium pressure turbine.
  • The is more preferred Turbine executed single-flow.
  • the turbine preferably has an outer housing in which an inner housing is arranged. Surrounds the inner case the rotor, being between the thrust compensating piston and the Inner housing the leakage fluid supply with a radial Gap is formed. In such a gap is preferred a non-contact seal arranged.
  • the object directed to a method is achieved according to the invention solved by a method of removing hot Leakage fluid, in which the leakage fluid flows through in a turbine a radial gap between a thrust compensation piston a rotor and a fixed turbine part flows, the hot leakage fluid with a colder sealing fluid is mixed and discharged.
  • a method of removing hot Leakage fluid in which the leakage fluid flows through in a turbine a radial gap between a thrust compensation piston a rotor and a fixed turbine part flows, the hot leakage fluid with a colder sealing fluid is mixed and discharged.
  • the leakage fluid By mixing the leakage fluid with the sealing fluid a fluid mixture that is also colder than the leakage fluid is. By suitable choice of the place where the Mixing takes place, a complete seal can be made of the piston.
  • the leak fluid preferably on the thrust compensation piston, in particular on the cold side, mixed with the sealing fluid.
  • a flow of the sealing fluid is preferably through a Rotation of the rotor generated. This happens in particular by means of a arranged on the thrust compensation piston Conveyor.
  • the flow of the sealing fluid is preferred directed radially outwards. Through the conveyor the sealing fluid is conveyed radially outwards.
  • Steam is preferably used as the sealing fluid if the leakage fluid is hot steam, the sealing fluid being colder Steam is. This is particularly true in a steam turbine the case.
  • a gas turbine is preferably used as Sealing fluid used a gas, such as cooling air.
  • the turbine 1 shows a turbine 1 in a longitudinal section, here a pot-type high-pressure steam turbine.
  • the turbine 1 has a rotor 2, which extends along an axis of rotation 19 extends.
  • the rotor 2 is of an inner casing 11 surrounded, which in turn by an outer housing 10 is surrounded. On both sides of the outer housing 10 the rotor 2 is supported with a respective shaft bearing 22. At the two end regions 25 of the outer housing 10 from which the rotor 2 protrudes is a shaft seal 24 provided.
  • the rotor 2 has between one Inflow area 21 and an evaporation area 20 for a hot action medium 26, here superheated steam, a blading area 3 on. Points in the blading area 3 the rotor 2 rotor blades 4 axially spaced apart from one another on. Between each axially adjacent blades 4 a series of guide vanes 23 on the inner casing 11 attached.
  • the rotor 2 has a thrust compensation piston 5, wherein the inflow region 21 axially between the blading region 3 and the thrust compensation piston 5 is arranged.
  • the flow compensating piston faces the inflow region 21 5, short the piston 5, a hot side 6 and a cold side 7 facing away from the inflow region 21.
  • the action medium 26 flows in the inflow area 21, flows through the blading area 3 and leaves the turbine 1 through the evaporation area 20.
  • the action medium 26 exerts a force on the moving blades 4 and thus on the rotor 2. This creates a boost in the direction of the axis of rotation 19.
  • This thrust is caused by counteracted the thrust compensation piston 5.
  • the piston 5 does not point to this on the cold side 7 and the hot side 6 surfaces of the same or different Size up with the same pressure or different Pressures are applied. From the difference of Products from pressure and relevant surface on the cold side 7 and the hot side 6 results in an axial force that the Counteracts thrust.
  • leak fluid 17 (see FIG. 2) in the axial direction over the piston 5, especially if one between cold side 7 and hot side 6 There is a pressure difference.
  • the amount of leak fluid 17 will small by a contactless seal, not shown held.
  • Fig. 2 is a section of a longitudinal section through a turbine 1, in particular a single-flow medium-pressure steam turbine, shown.
  • a Thrust compensating piston 5 is one Surround inner housing 11.
  • the piston 5 has one Blading area 3 not shown facing Hot side 6 and a cold side 7 facing away from this.
  • the Hot side 6 associated with a leakage fluid supply 12 is formed. This forms a radial gap at least in some areas between the piston 5 and the inner housing 11.
  • a feed 14 for sealing fluid 15 intended is a feed 14 for sealing fluid 15 intended.
  • a mixing area 13 At the end of the cold side 7 facing Piston 5 is a mixing area 13, a chamber or similar provided. Both open into the mixing area 13 the leakage fluid supply 12 and the supply 14 for the Sealing fluid 15. An outlet leads from the mixing area 13 16 into the inner housing 11.
  • a conveyor 8 On the cold side 7 is on the piston 5 a conveyor 8 with a plurality of flow guide elements 9 (see FIG. 3).
  • this conveyor device 8 acts as a radial fan.
  • a flow of the sealing fluid 15 in the Mixing area 13 reached.
  • hot leakage fluid 17 is thereby mixed, hot steam, with the colder sealing fluid 15, colder Steam.
  • That from the mixing area 13 via the discharge line 16 flowing fluid mixture 18 of leakage fluid 17 and sealing fluid 15 thus has a lower temperature than that Leaking fluid 17.
  • Fig. 3 shows a perspective elevation through a Turbine 1 according to Figure 2 in the area of the piston 5. At the Cold side 7 radial depressions are provided which the Form flow elements 9 of the conveyor 8.

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

Abstract

L'invention concerne une turbine (1) comportant un rotor (2) qui présente une zone d'aubage (3) pour des aubes mobiles (4) et un piston de compensation de poussée (5). Ledit piston de compensation de poussée (5) présente un côté chaud (6) qui fait face à la zone d'aubage (3) et un côté froid (7) opposé à la zone d'aubage (3). Dans une zone de mélange (13), il débouche d'une part une conduite d'alimentation (14) de fluide d'étanchéité (15), associée au côté froid (7) et d'autre part une conduite d'alimentation de fluide d'étanchéité (12) reliée par technique des fluides à la zone d'aubage (3). Une conduite d'évacuation (16) bifurque de la zone de mélange. L'invention concerne en outre un procédé permettant d'évacuer du liquide de fuite (17) chaud. Le liquide de fuite (17) entre dans une turbine (1) par une fente radiale (12) entre un piston de compensation de poussée (5) de rotor (2) et une partie de turbine (11) fixe, et est mélangé à un fluide d'étanchéité (15) plus froid, avant d'être évacué.

Claims (11)

  1. Turbine (1) comprenant un rotor (2) qui a une zone (3) d'aubage pour des aubes (4) mobiles, ainsi qu'un piston (5) de compensation de la poussée, piston (5) de compensation de la poussée qui a un côté (6) chaud tourné vers la zone (3) d'aubage et un côté (7) froid éloigné de la zone (3) d'aubage, caractérisé par une zone (13) de mélange dans laquelle débouchent une amenée (14) de fluide (15) d'étanchéité associée au côté (7) froid et une amenée (12) de fluide de fuite communiquant du point de vue de la technique de l'écoulement avec la zone (3) d'aubage et de laquelle part en dérivation un conduit (16) d'évacuation.
  2. Turbine (1) suivant la revendication 1, dans laquelle il est prévu du côté (7) froid un dispositif (8) de transport destiné à produire un courant du fluide (15) d'étanchéité dirigé radialement vers l'extérieur, le dispositif (8) de transport communiquant du point de vue de la technique de l'écoulement avec l'amenée (14) de fluide (15) d'étanchéité.
  3. Turbine (1) suivant la revendication 1 ou 2, dans laquelle le dispositif (8) de transport a une multiplicité d'éléments (9) de conduite du courant comme des gorges radiales, des trous radiaux ou des chicanes.
  4. Turbine (1) suivant l'une des revendications 1 à 3, dans laquelle le dispositif (8) de transport est fabriqué d'un seul tenant avec le piston (5) de compensation de poussée.
  5. Turbine (1) suivant l'une des revendications 1 à 4, qui est réalisée en turbine à vapeur, notamment en sous-turbine moyenne pression.
  6. Turbine (1) suivant l'une des revendications précédentes, comprenant une enveloppe (10) extérieure dans laquelle est disposée une enveloppe (11) intérieure, l'enveloppe (11) intérieure entourant le rotor (2) et il est formé entre le piston (5) de compensation de poussée et l'enveloppe (11) intérieure l'amenée (12) de fluide de fuite par un intervalle radial.
  7. Turbine (1) suivant l'une des revendications précédentes, qui est réalisée à un seul flux.
  8. Procédé d'évacuation de fluide (17) de fuite chaud, fluide (17) de fuite qui passe dans une turbine (1) par un intervalle (12) radial compris entre un piston (5) de compensation de la poussée d'un rotor (2) et une partie (11) fixe de turbine, le fluide (17) de fuite chaud étant mélangé à un fluide (15) d'étanchéité plus froid et étant évacué.
  9. Procédé suivant la revendication 8, dans lequel le fluide (17) de fuite est mélangé sur le piston (5) de compensation de poussée au fluide (15) d'étanchéité.
  10. Procédé suivant la revendication 8 ou 9, dans lequel le fluide (15) d'étanchéité est transporté radialement vers l'extérieur par une rotation du rotor (2) au moyen d'un dispositif (8) de transport disposé sur le piston (5) de compensation de la poussée.
  11. Procédé suivant l'une des revendications 8 à 10, dans lequel le fluide (17) de fuite est de la vapeur d'eau chaude et le fluide (15) d'étanchéité est de la vapeur d'eau plus froide.
EP00956463A 1999-08-27 2000-08-18 Turbine et procede pour evacuer du fluide de fuite Expired - Lifetime EP1206627B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00956463A EP1206627B1 (fr) 1999-08-27 2000-08-18 Turbine et procede pour evacuer du fluide de fuite

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP99116939 1999-08-27
EP99116939 1999-08-27
EP00956463A EP1206627B1 (fr) 1999-08-27 2000-08-18 Turbine et procede pour evacuer du fluide de fuite
PCT/EP2000/008089 WO2001016467A1 (fr) 1999-08-27 2000-08-18 Turbine et procede pour evacuer du fluide de fuite

Publications (2)

Publication Number Publication Date
EP1206627A1 EP1206627A1 (fr) 2002-05-22
EP1206627B1 true EP1206627B1 (fr) 2004-12-22

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Family Applications (1)

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EP00956463A Expired - Lifetime EP1206627B1 (fr) 1999-08-27 2000-08-18 Turbine et procede pour evacuer du fluide de fuite

Country Status (7)

Country Link
US (1) US6695575B1 (fr)
EP (1) EP1206627B1 (fr)
JP (1) JP4522633B2 (fr)
KR (1) KR20020028221A (fr)
CN (1) CN1171006C (fr)
DE (1) DE50009046D1 (fr)
WO (1) WO2001016467A1 (fr)

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EP1630360B1 (fr) * 2004-08-23 2009-10-28 Siemens Aktiengesellschaft Alimentation de vapeur pour le refroidissement d'une turbine a vapeur
KR100644966B1 (ko) * 2004-10-19 2006-11-15 한국과학기술연구원 초소형 동력 발생장치
EP1780376A1 (fr) * 2005-10-31 2007-05-02 Siemens Aktiengesellschaft Turbine à vapeur
EP1806476A1 (fr) * 2006-01-05 2007-07-11 Siemens Aktiengesellschaft Turbine pour une centrale thermique
FR2925939A1 (fr) * 2007-12-28 2009-07-03 Alstom Power Hydraulique Sa Machine hydraulique, installation de conversion d'energie comprenant une telle machine et procede d'ajustement d'une telle machine
EP2154332A1 (fr) * 2008-08-14 2010-02-17 Siemens Aktiengesellschaft Réduction de la charge thermique d'un boîtier extérieur pour une turbomachine
DE102008045655B4 (de) * 2008-09-03 2010-06-17 Siemens Aktiengesellschaft Dampfturbinensystem mit einer Kondensationsdampfturbine mit einer energieeffizienten Sperrdampfversorgung
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EP2431570A1 (fr) * 2010-09-16 2012-03-21 Siemens Aktiengesellschaft Turbine à vapeur comprenant un piston d'équilibrage de poussée et blocage de vapeur saturé
KR102406229B1 (ko) * 2017-10-18 2022-06-10 한화파워시스템 주식회사 작동 유체 씰링 시스템
CN108625917B (zh) * 2018-06-28 2024-05-24 西安交通大学 一种超临界二氧化碳布雷顿循环动力部件冷却密封隔热系统
CN112253259A (zh) * 2020-09-16 2021-01-22 上海发电设备成套设计研究院有限责任公司 一种透平转子系统
CN115290291B (zh) * 2022-06-14 2024-05-24 南京航空航天大学 一种模拟边界层泄流与亚声速外流耦合作用的实验装置

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Also Published As

Publication number Publication date
EP1206627A1 (fr) 2002-05-22
JP2003508665A (ja) 2003-03-04
DE50009046D1 (de) 2005-01-27
CN1171006C (zh) 2004-10-13
CN1370254A (zh) 2002-09-18
US6695575B1 (en) 2004-02-24
JP4522633B2 (ja) 2010-08-11
KR20020028221A (ko) 2002-04-16
WO2001016467A1 (fr) 2001-03-08

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