EP2295725A1 - Machine d'écoulement dotée d'une sortie de vapeur - Google Patents

Machine d'écoulement dotée d'une sortie de vapeur Download PDF

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Publication number
EP2295725A1
EP2295725A1 EP09010469A EP09010469A EP2295725A1 EP 2295725 A1 EP2295725 A1 EP 2295725A1 EP 09010469 A EP09010469 A EP 09010469A EP 09010469 A EP09010469 A EP 09010469A EP 2295725 A1 EP2295725 A1 EP 2295725A1
Authority
EP
European Patent Office
Prior art keywords
inner housing
housing
rotor
joint
flow
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Withdrawn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
EP09010469A
Other languages
German (de)
English (en)
Inventor
Martin Kuhn
Christoph Kästner
Rudolf Dr. 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 EP09010469A priority Critical patent/EP2295725A1/fr
Priority to PCT/EP2010/060288 priority patent/WO2011018299A1/fr
Priority to EP10732983A priority patent/EP2464830A1/fr
Priority to CN201080035885.9A priority patent/CN102472110B/zh
Publication of EP2295725A1 publication Critical patent/EP2295725A1/fr
Withdrawn legal-status Critical Current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
    • 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 and outer inner casing disposed around the rotor, and an outer casing disposed around the inner and outer inner casings, the outer inner casing being arranged along a portion of the rotation axis around the inner inner casing is, wherein between the rotor and the inner and outer inner housing, a flow region for flowing a flow medium is formed.
  • 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, a flow channel is formed.
  • 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 must 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 are feasible 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. This requires that high-quality materials are used, in particular in the area of the inflow and in the area of the first guide vanes grooves.
  • the bleed positions should be as freely as possible within the flow range.
  • the tap positions are located at the junction between the inner and outer housings. This means that the bleed steam is taken between the inner and outer inner casing.
  • 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 rotor rotatably mounted about a rotation axis, an inner inner housing disposed about the rotor, and an outer inner housing and an outer housing disposed about the inner and outer inner housings, the outer inner housing being disposed along a portion of the axis of rotation about the axis inner inner casing is arranged, wherein between the rotor and the inner and outer inner casing, a flow region for flowing a flow medium is formed, wherein a seal between the inner inner casing and the outer inner casing is arranged and in the inner and / or Outer inner housing a tapping hole for removing flow medium from the flow area is arranged.
  • An essential idea of the invention is not to remove the vapor at the joint between the inner and outer inner casing as before, but to arrange a seal between the inner inner casing and the outer inner casing and a tapping hole at the point in the inner and / or to arrange 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 show a higher sealing effect than the labyrinth seals.
  • a joint made with brush seals is easier to mount between the inner inner case and the outer inner case, resulting in an acceleration of assembly time and manufacturing time.
  • 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.
  • the joint is not straight, but includes a step. 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 in the FIG. 1 illustrated steam turbine 1 as an embodiment of a turbomachine comprises substantially an outer housing 2, a disposed within the outer housing 2 outer inner casing 3 and an inner inner casing 4 disposed within the outer inner casing 3.
  • a rotor 5 is rotatably supported 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. For clarity, individual runners and vanes are not shown in detail. 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 flowing in the first flow region 8 flows in a flow direction 9 along the flow channel 7 FIG. 1 shown steam turbine 1 is formed in two columns, that is, that in the first flow region 8 of the steam flows both along a first flood and along a second flood.
  • 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.
  • 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 by means of a seal, which in the FIG. 1 not shown in detail, sealed. 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 is an enlarged view of a section of the in FIG. 1 to recognize the illustrated steam turbine 1.
  • 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 grooved 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 an alternative embodiment of the joint 11 is shown.
  • the joint 11 is designed here stepped.
  • the outer inner housing 3 has a step 13, which rests in a complementarily formed second stage 14.
  • the position of turbine blade roots arranged in the outer inner housing 3 can be varied in an axial direction 15. For some applications, bleed vapors from the flow channel 7 are needed.
  • bleed vapors are removed via bleed 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 essentially free in the choice of the axial positioning of the tapping bores ,
  • the location of the tapping bores can therefore be selected according to the desired tapping temperatures and tapping pressures of the tapping steam.
  • the in the FIG. 1 shown 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 shown in the outer inner housing, said tap hole 16 establishes a fluidic connection between the flow channel 7 and a between the inner inner housing 4 and the outer inner housing 3 formed gap.

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)
EP09010469A 2009-08-13 2009-08-13 Machine d'écoulement dotée d'une sortie de vapeur Withdrawn EP2295725A1 (fr)

Priority Applications (4)

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
CN201080035885.9A CN102472110B (zh) 2009-08-13 2010-07-16 具有蒸汽排放口的涡轮机

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP2295725A1 true EP2295725A1 (fr) 2011-03-16

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 After (1)

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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20050196267A1 (en) * 2004-03-04 2005-09-08 General Electric Company Method and apparatus for reducing self sealing flow in combined-cycle steam turbines

Family Cites Families (2)

* 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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20050196267A1 (en) * 2004-03-04 2005-09-08 General Electric Company Method and apparatus for reducing self sealing flow in combined-cycle steam turbines

Also Published As

Publication number Publication date
CN102472110B (zh) 2015-03-04
EP2464830A1 (fr) 2012-06-20
WO2011018299A1 (fr) 2011-02-17
CN102472110A (zh) 2012-05-23

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