EP2464830A1 - Turbomachine avec prélèvement de vapeur - Google Patents

Turbomachine avec prélèvement de vapeur

Info

Publication number
EP2464830A1
EP2464830A1 EP10732983A EP10732983A EP2464830A1 EP 2464830 A1 EP2464830 A1 EP 2464830A1 EP 10732983 A EP10732983 A EP 10732983A EP 10732983 A EP10732983 A EP 10732983A EP 2464830 A1 EP2464830 A1 EP 2464830A1
Authority
EP
European Patent Office
Prior art keywords
inner housing
housing
flow
rotor
joint
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.)
Withdrawn
Application number
EP10732983A
Other languages
German (de)
English (en)
Inventor
Martin Kuhn
Christoph Kästner
Rudolf PÖTTER
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
Priority to EP10732983A priority Critical patent/EP2464830A1/fr
Publication of EP2464830A1 publication Critical patent/EP2464830A1/fr
Withdrawn legal-status Critical Current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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • 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
    • F01D11/005—Sealing means between non relatively rotating elements
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/105—Final actuators by passing part of the fluid
    • 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
    • F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
    • F01D3/02—Machines or engines with axial-thrust balancing effected by working-fluid characterised by having one fluid flow in one axial direction and another fluid flow in the opposite direction
    • 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
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • 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
    • F05D2240/00—Components
    • F05D2240/55—Seals

Definitions

  • the invention relates to a turbomachine comprising a rotor rotatably mounted about a rotation axis, an inner inner casing arranged around the rotor and outer
  • a steam turbine Under a turbomachine, for example, a steam turbine is understood.
  • a steam turbine usually has a rotatably mounted rotor and an inner housing which is arranged around the rotor. Between the rotor and the
  • Inner housing is formed a flow channel.
  • the housing of a steam turbine must be able to fulfill several functions.
  • the guide vanes are arranged in the flow channel on the housing and on the other hand, the inner housing has to withstand the pressure and the temperatures of the flow medium for all load and operating conditions.
  • the flow medium is steam.
  • the housing must be designed such that inlets and outlets, which are also referred to as taps, are possible.
  • the housing must be designed such that the shaft ends can be passed through the housing. The high voltages, pressures, and temperatures that occur during operation require that the materials be properly selected and that the design be selected to provide mechanical integrity and functionality.
  • the invention begins, whose task is to offer a steam turbine, in which the tap is variable in the axial direction.
  • a turbomachine comprising a rotatably mounted about a rotation axis
  • An essential idea of the invention is not, as hitherto customary, to remove the vapor at the joint between the inner and outer inner casings, but to arrange a seal between the inner inner casing and the outer inner casing and a tapping bore at the point in the inner and / or outer inner housing, which is suitable for removing the appropriate bleed steam. Due to the fact that now no more steam can be flowed at the joint between the inner and the outer inner casing, the axial position of the tapping bore can be selected substantially freely along the flow region.
  • a labyrinth seal is arranged between the inner and the outer inner housing.
  • labyrinth seals can be relatively easily incorporated into the inner and outer inner casings.
  • sealing lips are caulked in grooves.
  • a brush seal is arranged between the inner inner housing and the outer inner housing.
  • Brush seals which are not non-contact seals in comparison to labyrinth seals, have the advantage that they have a higher seal
  • an I-ring seal is arranged between the inner inner housing and the outer inner housing.
  • a gradation is performed at the joint between the inner inner housing and the outer inner housing. This means that the joint is not straight, but one
  • Stage includes. This makes it possible to arrange turbine blade stages in the region of the joint, wherein there is a possibility of variation in the axial direction.
  • the invention will be explained in more detail with reference to an embodiment. Components with the same mode of operation are provided with the same reference numerals.
  • Figure 1 is a sectional view through a three-shelled
  • Figure 2 is an enlarged sectional view of a part of
  • Figure 3 is an enlarged view of a joint
  • Figure 2 Figure 4 shows an alternative embodiment of a joint
  • Figure 5 is an enlarged view of the alternative
  • the steam turbine 1 shown in FIG. 1 as an embodiment of a turbomachine essentially comprises an outer housing 2, a housing arranged inside the outer housing 2. tes outer inner housing 3 and disposed within the outer inner housing 3 inner inner housing. 4
  • a rotor 5 is rotatably mounted about a rotation axis 6. Between the outer inner casing 3 and the rotor 5 and between the inner inner casing 4 and the rotor 5, a flow channel 7 is formed.
  • the vanes are arranged on the inner inner casing 4 and on the outer inner casing 3. On the rotor 5, the blades are arranged such that in the flow channel 7, the thermal energy of a vapor can be converted into rotational energy.
  • the steam turbine 1 shown in FIG. 1 is designed to be double-flowed, that is to say that in the first flow area 8 the steam flows both along a first flow and along a second flow flows.
  • a second flow region 10 is formed between the outer inner casing 3 and the rotor 5.
  • the outer inner casing 3 is formed around the inner inner casing 4 with respect to the rotation axis 6. Outside the first flow region 8, the outer inner housing 3 is not arranged around the inner inner housing 4 relative to the axis of rotation 6.
  • the first flow region 8 comprises the flow channel 7 up to the point at which the inner inner casing 4 stops.
  • the area in which the inner inner housing 4 and the outer inner housing 3 are adjacent to each other is also referred to as a joint 11.
  • This joint 11 is removed by means of a seal, which is not shown in detail in FIG. seals. This means that a steam located in the flow channel 7 can not flow between the outer inner casing 3 and the inner inner casing 4 at the joint 11.
  • FIG. 2 shows an enlarged illustration of a detail of the steam turbine 1 shown in FIG.
  • the joint 11 is designed such that a labyrinth seal between the outer inner housing 3 and the inner inner housing 4 is arranged.
  • the labyrinth seal comprises individual sealing lips 12 which are wedged in grooves.
  • the joint can be sealed by means of brush seals.
  • an I-ring seal may be used to seal the joint 11.
  • FIG. 4 shows an alternative embodiment of the joint 11.
  • the joint 11 is designed here stepped. This means that the outer inner housing 3 has a step 13, which rests in a complementarily formed second stage 14. As a result of this graduated embodiment of the joint, the position of turbine blade roots arranged in the outer inner housing 3 can be varied in an axial direction 15.
  • tap vapors from the flow channel 7 are needed. These bleed vapors are removed via tapping bores 16 from the flow channel 7, since now the bleed steam is no longer necessarily removed at the joint 11 between the outer inner housing 3 and the inner inner housing 4, one is in the choice of the axial positioning of the tap holes in
  • the location of the tapping bores can therefore be selected according to the desired tapping temperatures and tapping pressures of the tapping steam.
  • the figure shown in FIG. th location of the tap holes is a tap hole 16 in the vicinity of the joint 11 in the inner inner housing 4 and a further tap hole 16 in the outer inner housing shown, said tap hole 16 113g establishes a fluidic connection between the flow channel 7 and between the inner inner housing 4 and the outer inner housing 3 formed gap.
  • the execution of the joint 11 with the gradation 13, 14 allows a better utilization of the axial length for the position of the blading, while optimally selecting the steam condition for the bleed steam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

L'invention concerne une turbine à vapeur (1) à trois coques, sur laquelle un rotor (5) est monté de façon rotative et un boîtier intérieur interne (4) et un boîtier intérieur externe (3) sont disposés autour du rotor (5), le point de jonction (11) entre le boîtier intérieur interne (4) et le boîtier intérieur externe (3) étant rendu étanche et des alésages de soutirage (16) étant disposés dans le boîtier intérieur interne (4) et/ou le boîtier intérieur externe (3).
EP10732983A 2009-08-13 2010-07-16 Turbomachine avec prélèvement de vapeur Withdrawn EP2464830A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10732983A EP2464830A1 (fr) 2009-08-13 2010-07-16 Turbomachine avec prélèvement de vapeur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09010469A EP2295725A1 (fr) 2009-08-13 2009-08-13 Machine d'écoulement dotée d'une sortie de vapeur
PCT/EP2010/060288 WO2011018299A1 (fr) 2009-08-13 2010-07-16 Turbomachine avec prélèvement de vapeur
EP10732983A EP2464830A1 (fr) 2009-08-13 2010-07-16 Turbomachine avec prélèvement de vapeur

Publications (1)

Publication Number Publication Date
EP2464830A1 true EP2464830A1 (fr) 2012-06-20

Family

ID=41460945

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09010469A Withdrawn EP2295725A1 (fr) 2009-08-13 2009-08-13 Machine d'écoulement dotée d'une sortie de vapeur
EP10732983A Withdrawn EP2464830A1 (fr) 2009-08-13 2010-07-16 Turbomachine avec prélèvement de vapeur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09010469A Withdrawn EP2295725A1 (fr) 2009-08-13 2009-08-13 Machine d'écoulement dotée d'une sortie de vapeur

Country Status (3)

Country Link
EP (2) EP2295725A1 (fr)
CN (1) CN102472110B (fr)
WO (1) WO2011018299A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690253A1 (fr) * 2012-07-27 2014-01-29 Siemens Aktiengesellschaft Turbine à basse pression
CN106089307B (zh) * 2016-07-29 2018-01-09 杭州汽轮机股份有限公司 一种低参数大流量双分流背压式汽轮机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915581A (en) * 1989-01-03 1990-04-10 Westinghouse Electric Corp. Steam turbine with improved inner cylinder
US4900223A (en) * 1989-02-21 1990-02-13 Westinghouse Electric Corp Steam turbine
US5024579A (en) * 1990-07-18 1991-06-18 Westinghouse Electric Corp. Fully floating inlet flow guide for double-flow low pressure steam turbines
US5211703A (en) * 1990-10-24 1993-05-18 Westinghouse Electric Corp. Stationary blade design for L-OC row
EP1445519A1 (fr) * 2003-02-07 2004-08-11 Siemens Aktiengesellschaft Joint circulaire haute-pression pour turbines à vapeur
US7040861B2 (en) * 2004-03-04 2006-05-09 General Electric Company Method and apparatus for reducing self sealing flow in combined-cycle steam turbines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011018299A1 *

Also Published As

Publication number Publication date
CN102472110A (zh) 2012-05-23
EP2295725A1 (fr) 2011-03-16
CN102472110B (zh) 2015-03-04
WO2011018299A1 (fr) 2011-02-17

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