EP2216515A1 - Turbine à vapeur à trois coques avec une soupape - Google Patents

Turbine à vapeur à trois coques avec une soupape Download PDF

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Publication number
EP2216515A1
EP2216515A1 EP09001835A EP09001835A EP2216515A1 EP 2216515 A1 EP2216515 A1 EP 2216515A1 EP 09001835 A EP09001835 A EP 09001835A EP 09001835 A EP09001835 A EP 09001835A EP 2216515 A1 EP2216515 A1 EP 2216515A1
Authority
EP
European Patent Office
Prior art keywords
valve
housing
diffuser
valve housing
steam 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.)
Withdrawn
Application number
EP09001835A
Other languages
German (de)
English (en)
Inventor
Peter Dr. Dumstorff
Christoph Kästner
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 EP09001835A priority Critical patent/EP2216515A1/fr
Priority to PCT/EP2010/050715 priority patent/WO2010091928A1/fr
Publication of EP2216515A1 publication Critical patent/EP2216515A1/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Withdrawn legal-status Critical Current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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • 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
    • 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
    • F01D9/06—Fluid supply conduits to nozzles or the like

Definitions

  • the invention relates to a turbomachine with a valve, wherein the turbomachine comprises an inner inner housing, an outer inner housing and an outer housing, wherein the valve comprises a valve diffuser and a valve housing, wherein the valve housing is connected via a valve flange to the outer housing, wherein the inner inner housing is connected via a first angle ring connection with the valve diffuser.
  • a steam turbine conventionally includes a rotatably mounted rotor and a housing disposed about the rotor. Between the rotor and the inner housing, a flow channel is formed.
  • the housing in a steam turbine must be able to fulfill several functions.
  • the guide vanes are arranged in the flow channel on the housing and, secondly, the inner housing must withstand the pressure and the temperatures of the flow medium for all load and special operating cases.
  • the flow medium is steam.
  • the housing must be designed such that inlets and outlets, which are also referred to as taps, are possible. Another feature that a case must meet is the possibility of a shaft end passing through the case.
  • 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, especially in the area of the inflow and the first Leitschaufelnuten.
  • nickel-base alloys are suitable because they withstand the stresses occurring at high temperatures.
  • the use of such a nickel-based alloy is associated with new challenges.
  • the cost of nickel-base alloys is comparatively high and, in addition, the manufacturability of nickel-base alloys, e.g. limited by limited casting possibilities.
  • the use of nickel-based materials must be minimized.
  • the nickel-based materials are poor heat conductors.
  • the temperature gradients over the wall thickness are so great that thermal stresses are comparatively high.
  • the valve essentially comprises a valve housing and a valve diffuser arranged in the valve.
  • the valve diffuser is usually designed for guiding the flow medium. If the valve diffuser and the inner housing were rigidly coupled together by means of frictional connections, this would lead to stresses and possibly to deformations that are undesirable. Therefore, so-called.
  • Angular ring connections are used. In this case, the valve diffuser and the inner housing each have a groove in which an angle ring is arranged. This results in that a thermal movement can be compensated in both an axial and in a radial direction.
  • a further inner housing is now additionally added between the inner inner housing and the outer housing, which designates the outer inner housing can be.
  • the outer inner housing also performs as a result of thermal changes from a thermal movement, which may possibly interfere with the valve diffuser.
  • Another requirement is that the space between the inner inner casing and the outer inner casing as well as the outer inner casing and the outer casing should be sealed. Nevertheless, mechanical stresses due to thermal movements should be avoided.
  • the object of the invention is to offer a structurally simple solution to couple a valve to a three-shell steam turbine.
  • turbomachine with a valve
  • the turbomachine comprises an inner inner housing, an outer inner housing and an outer housing
  • the valve comprises a valve diffuser and a valve housing
  • the valve housing is connected via a valve flange with the outer housing
  • the inner inner housing is connected via a first angular ring connection with the valve diffuser
  • the valve housing has a valve housing projection and the outer inner housing is coupled via a second angular annular connection with the valve housing projection.
  • valve housing is formed with a valve housing projection and this valve housing projection projects into the steam turbine, wherein the valve housing projection via the second angular connection is coupled with the outer inner housing.
  • valve housing projection is formed with a Ventilgephaseusevorsprungsnut for receiving a second angle ring.
  • angle rings makes it particularly easy to compensate for movement of the inner housing and the valve due to thermal expansion relative to each other. For this purpose, only the angle ring must be received in a corresponding groove.
  • valve diffuser is connected outside the turbomachine to the valve housing.
  • a first gap space between the valve housing projection and the outer housing is formed. Through this gap, the outer casing is thermally decoupled. Since the valve housing projection is formed from the valve housing, a seal between the outer inner housing and the outer housing is inevitably reachable. The valve housing serves, so to speak, as a seal between the outer inner housing and the outer housing. Another seal is therefore not required.
  • a second gap space is formed between the valve housing projection and the valve diffuser. This gap can be acted upon with a cooling steam. As a result, the live steam flowing through the valve diffuser is cooled by the cooling steam located in the second gap space, so that the thermal load of the valve diffuser is reduced.
  • valve diffuser is screwed to the valve housing. This is a easy way to detachably connect the valve diffuser to the valve body.
  • FIG. 1 shows a part of a three-shell steam turbine in cross section.
  • a steam turbine is an embodiment of a turbomachine.
  • a valve is coupled to the steam turbine.
  • the steam turbine comprises an inner inner housing 1, an outer inner housing 2 and an outer housing 3.
  • a valve housing 4 via a flange 5 is detachably connected. This can be done by screws.
  • the valve comprises a valve diffuser 6.
  • the valve diffuser 6 is coupled via a first angular ring connection 7 to the inner inner housing 1.
  • the valve housing 4 is coupled via a second angle ring connection 8 to the outer inner housing 2.
  • the valve housing 4 has a valve housing projection 9, which projects into the steam turbine.
  • the valve housing projection 9 is designed to run slightly longer than the valve housing 4 to the flange 5. Between the valve housing projection 9 and the outer housing 3 and the valve housing 4, a first gap space 10 is formed, which is filled with an exhaust steam.
  • the valve housing 4, the flange 5 and the valve housing projection 9 are made of one piece material.
  • the second angle connection 8 comprises a second angle ring 11.
  • the second angle ring 11 comprises a first angle ring leg 12 and a second angle ring leg 13, wherein the first angle ring leg 12 is substantially perpendicular to the second angle ring leg 13.
  • the first angle ring leg 12 is inserted into a matching groove in the outer inner housing 2.
  • the second angle ring leg 13 is inserted accordingly into a groove in the valve housing projection 9.
  • the first angle ring connection 7 has a first angle ring 14 which comprises a first angle ring leg 15 and a second angle ring leg 16 formed perpendicular thereto.
  • the first angle ring leg 15 is inserted into a corresponding groove in the inner inner housing 1.
  • the second angle ring leg 16 is also inserted into a corresponding groove in the valve diffuser 6.
  • the valve diffuser 6 is designed such that a contact between the valve diffuser 6 and the valve housing 4 is formed outside of the steam turbine. Outside is a touch outside the opening 17 of the outer housing 3 to understand.
  • a second gap space 18 is formed, in which a cooling steam can be flowed.
  • the cooling steam located in the gap 18 can cool the thermally heavily loaded valve diffuser 6, whereby the thermal load of the valve diffuser 6 is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Housings (AREA)
EP09001835A 2009-02-10 2009-02-10 Turbine à vapeur à trois coques avec une soupape Withdrawn EP2216515A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09001835A EP2216515A1 (fr) 2009-02-10 2009-02-10 Turbine à vapeur à trois coques avec une soupape
PCT/EP2010/050715 WO2010091928A1 (fr) 2009-02-10 2010-01-22 Turbine à vapeur à triple coque avec vanne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09001835A EP2216515A1 (fr) 2009-02-10 2009-02-10 Turbine à vapeur à trois coques avec une soupape

Publications (1)

Publication Number Publication Date
EP2216515A1 true EP2216515A1 (fr) 2010-08-11

Family

ID=40792810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09001835A Withdrawn EP2216515A1 (fr) 2009-02-10 2009-02-10 Turbine à vapeur à trois coques avec une soupape

Country Status (2)

Country Link
EP (1) EP2216515A1 (fr)
WO (1) WO2010091928A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2487337A1 (fr) * 2011-02-11 2012-08-15 Siemens Aktiengesellschaft Turbine à vapeur en construction à trois coquilles
CN104033190A (zh) * 2014-06-26 2014-09-10 上海电气电站设备有限公司 一种三层壳汽轮机的进汽结构
CN104948746A (zh) * 2014-03-31 2015-09-30 株式会社东芝 蒸气阀

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59224404A (ja) * 1983-06-01 1984-12-17 Fuji Electric Co Ltd 超高温蒸気タ−ビンの蒸気導入管
EP0128343A1 (fr) * 1983-06-09 1984-12-19 BBC Aktiengesellschaft Brown, Boveri & Cie. Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur
US4802679A (en) * 1987-12-31 1989-02-07 Westinghouse Electric Corp. Bell seal of improved stability for high pressure turbines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59224404A (ja) * 1983-06-01 1984-12-17 Fuji Electric Co Ltd 超高温蒸気タ−ビンの蒸気導入管
EP0128343A1 (fr) * 1983-06-09 1984-12-19 BBC Aktiengesellschaft Brown, Boveri & Cie. Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur
US4802679A (en) * 1987-12-31 1989-02-07 Westinghouse Electric Corp. Bell seal of improved stability for high pressure turbines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2487337A1 (fr) * 2011-02-11 2012-08-15 Siemens Aktiengesellschaft Turbine à vapeur en construction à trois coquilles
WO2012107140A1 (fr) * 2011-02-11 2012-08-16 Siemens Aktiengesellschaft Turbine à vapeur à triple enveloppe
CN103370498A (zh) * 2011-02-11 2013-10-23 西门子公司 三壳结构形式的蒸汽轮机
CN103370498B (zh) * 2011-02-11 2016-06-08 西门子公司 三壳结构形式的蒸汽轮机
CN104948746A (zh) * 2014-03-31 2015-09-30 株式会社东芝 蒸气阀
EP2927546A1 (fr) * 2014-03-31 2015-10-07 Kabushiki Kaisha Toshiba Soupape à vapeur
US9810326B2 (en) 2014-03-31 2017-11-07 Kabushiki Kaisha Toshiba Steam valve
CN104033190A (zh) * 2014-06-26 2014-09-10 上海电气电站设备有限公司 一种三层壳汽轮机的进汽结构

Also Published As

Publication number Publication date
WO2010091928A1 (fr) 2010-08-19

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