EP2412937A1 - Turbine à vapeur et procédé de refroidissement de celle-ci - Google Patents

Turbine à vapeur et procédé de refroidissement de celle-ci Download PDF

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Publication number
EP2412937A1
EP2412937A1 EP10171447A EP10171447A EP2412937A1 EP 2412937 A1 EP2412937 A1 EP 2412937A1 EP 10171447 A EP10171447 A EP 10171447A EP 10171447 A EP10171447 A EP 10171447A EP 2412937 A1 EP2412937 A1 EP 2412937A1
Authority
EP
European Patent Office
Prior art keywords
steam
cooling
rotor
flow channel
stator
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Withdrawn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
EP10171447A
Other languages
German (de)
English (en)
Inventor
Ingo Förster
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 EP10171447A priority Critical patent/EP2412937A1/fr
Priority to CN201180037593.3A priority patent/CN103052768B/zh
Priority to PCT/EP2011/062251 priority patent/WO2012013531A1/fr
Priority to EP11740595.1A priority patent/EP2598724B1/fr
Priority to JP2013520110A priority patent/JP5604684B2/ja
Publication of EP2412937A1 publication Critical patent/EP2412937A1/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Withdrawn legal-status Critical Current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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/14—Casings modified therefor
    • 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
    • F01D25/08—Cooling; Heating; Heat-insulation
    • 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
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium
    • F05D2260/2322—Heat transfer, e.g. cooling characterized by the cooling medium steam

Definitions

  • the invention relates to a steam turbine according to the preamble of claim 1 and to a corresponding method for cooling such a steam turbine according to claim 6.
  • High outputs of the steam turbine require correspondingly high operating temperatures of the live steam and thus an increased thermal load of individual components of the steam turbine.
  • these components which are subject to particularly high thermal loads, must be sufficiently cooled in order to ensure the safe operation of the steam turbine.
  • sealing elements must be there On the one hand be as tight as possible, even to prevent a reverse flow of cooling steam in the live steam chamber even with a change in the steam conditions, as they occur during a load change. On the other hand, the sealing elements but must be leaking enough to ensure a sufficiently rapid pressure relief in the case of a turbine quick shutdown. These sealing elements must therefore be designed for both, but conflicting requirements.
  • the object of the invention is to provide an improved steam turbine and an improved method for cooling such a steam turbine.
  • a portion of the live steam from the flow channel can thus be fed directly to the cooling steam by an additional pressure equalization cross-connection between the flow channel and the cooling steam supply.
  • the additional sealing elements which delimit the area subjected to high thermal stress such as, for example, the thrust balance piston of the rotor engaging in the stator, thus do not have to be delimited from the area with live steam As high demands are made because the pressure difference between the two rooms is lower.
  • the radial pressure balance downstream of a blade can be utilized for pressure equalization during operation of the turbine.
  • a pressure difference with a higher static pressure on the radially outer side of the flow channel exists in the swirl-adhering flow generated in the flow channel.
  • This higher pressure applied to the pressure equalization cross-connection also establishes a higher pressure in the cooling-steam space via the pressure-equalizing cross-connection directly.
  • a space connection between live steam and cooling steam through which a cooling steam surplus can be emptied directly, so that the sealing elements are less stressed.
  • the pressure equalization transverse connection is arranged in the inner housing of the stator and here in particular close to the inflow region of the flow channel, so that the locally highest pressure of the flow channel can be tapped. If the pressure equalization cross-connection also opens into the cooling steam feed close to the area subjected to high thermal stress, short passageways of the pressure-compensating cross-connection can be achieved.
  • a flow channel 4 is formed, in which in the axial direction alternately blade rows 33 of the rotor 3 and Guide vanes 23 of the stator 2 are arranged.
  • live steam is fed to an inflow region 41 of the flow channel 4.
  • the so-streamed live steam then flows downstream in the flow channel 4, the rotor 33 and vane rows 23, expands and cools. The thermal energy released thereby causes the rotor 3 to rotate.
  • the cooling steam supply 6 comprises in the present embodiment, an external supply line 61 from the outside to the outer housing 22, a participatgeophensselbohrung 62, a flow space 63 between the outer housing 22 and inner housing 21 and at least one mecanicgeophensselbohrung 64.
  • Both the cooling steam supply and the live steam supply as in the figure indicated, additional valves for controlling the respective amount of steam.
  • additional (but not shown here) sealing elements are provided for the separation of the two steam rooms in the turbine 1 at the points at which the live steam space and the cooling steam space are particularly close to each other. Due to the pressure difference between cooling and live steam, however, particularly high demands must be placed on these sealing elements. On the other hand, the sealing elements must also be designed so that they are "permeable" in the case of an emergency shutdown to quickly reduce a cooling steam surplus.
  • a pressure compensation transverse connection 7 between the flow channel 4 and the cooling steam supply 6 is provided.
  • this cross-connection 7 is close to Inflow 41, the live steam in the flow channel 4 and the thermally highly loaded zone 34 is provided.
  • the pressure equalization transverse connection 7, which is formed, for example, as a bore in the inner housing 21 of the stator 2, allows a portion of the live steam from the flow channel 4 to be fed directly to the cooling steam. This creates a pressure equalization between live steam room and cooling steam space through this cross connection.
  • the cross-connection can be used in the case of an emergency shutdown as a "bypass" and thus dissipate excess coolant from the cooling steam space in the live steam space.
  • the pressure equalization transverse connection could also lead directly into the area of high thermal stress flowed through by cooling steam. The part of the live steam from the flow channel would then be supplied to the cooling steam only in this area.
  • the pressure compensating transverse connection can consist of a radially and an axially aligned region, but it could also lead, as a straight bore, obliquely through the inner housing from the flow channel to the inner housing cooling bore.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP10171447A 2010-07-30 2010-07-30 Turbine à vapeur et procédé de refroidissement de celle-ci Withdrawn EP2412937A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10171447A EP2412937A1 (fr) 2010-07-30 2010-07-30 Turbine à vapeur et procédé de refroidissement de celle-ci
CN201180037593.3A CN103052768B (zh) 2010-07-30 2011-07-18 蒸汽轮机以及用于冷却这种蒸汽轮机的方法
PCT/EP2011/062251 WO2012013531A1 (fr) 2010-07-30 2011-07-18 Turbine à vapeur et procédé pour refroidir une turbine à vapeur
EP11740595.1A EP2598724B1 (fr) 2010-07-30 2011-07-18 Turbine à vapeur et procédé pour refroidir une turbine à vapeur
JP2013520110A JP5604684B2 (ja) 2010-07-30 2011-07-18 蒸気タービンおよび該蒸気タービンの冷却法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10171447A EP2412937A1 (fr) 2010-07-30 2010-07-30 Turbine à vapeur et procédé de refroidissement de celle-ci

Publications (1)

Publication Number Publication Date
EP2412937A1 true EP2412937A1 (fr) 2012-02-01

Family

ID=43304943

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10171447A Withdrawn EP2412937A1 (fr) 2010-07-30 2010-07-30 Turbine à vapeur et procédé de refroidissement de celle-ci
EP11740595.1A Not-in-force EP2598724B1 (fr) 2010-07-30 2011-07-18 Turbine à vapeur et procédé pour refroidir une turbine à vapeur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11740595.1A Not-in-force EP2598724B1 (fr) 2010-07-30 2011-07-18 Turbine à vapeur et procédé pour refroidir une turbine à vapeur

Country Status (4)

Country Link
EP (2) EP2412937A1 (fr)
JP (1) JP5604684B2 (fr)
CN (1) CN103052768B (fr)
WO (1) WO2012013531A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109826675A (zh) * 2019-03-21 2019-05-31 上海电气电站设备有限公司 汽轮机冷却系统及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626851B (zh) * 2012-04-27 2014-07-02 上海电气电站设备有限公司 高压导叶持环加工工艺
CN109184823B (zh) * 2018-11-06 2024-03-19 上海电气电站设备有限公司 一种具有补汽结构的汽轮机及其运行方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1674669A1 (fr) * 2004-12-21 2006-06-28 Siemens Aktiengesellschaft Procédé de refroidissement de turbine à vapeur
EP1785586A1 (fr) * 2005-10-20 2007-05-16 Siemens Aktiengesellschaft Rotor d'une turbomachine
EP1788191A1 (fr) * 2005-11-18 2007-05-23 Siemens Aktiengesellschaft Turbine à vapeur et procédé pour le refroidissement d'une turbine à vapeur
EP2067933A2 (fr) 2007-08-31 2009-06-10 Siemens Aktiengesellschaft Concept de sécurité pour une turbine à vapeur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620828C1 (de) * 1996-05-23 1997-09-04 Siemens Ag Turbinenwelle sowie Verfahren zur Kühlung einer Turbinenwelle
JP4064532B2 (ja) * 1998-06-05 2008-03-19 三菱重工業株式会社 蒸気タービンの外車室冷却構造
EP1445427A1 (fr) * 2003-02-05 2004-08-11 Siemens Aktiengesellschaft Turbine à vapeur et procédé d'opération d'une turbine à vapeur
EP1780376A1 (fr) * 2005-10-31 2007-05-02 Siemens Aktiengesellschaft Turbine à vapeur
CN2833117Y (zh) * 2005-11-04 2006-11-01 哈尔滨汽轮机厂有限责任公司 具有转子冷却结构的高中压合缸的超超临界汽轮机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1674669A1 (fr) * 2004-12-21 2006-06-28 Siemens Aktiengesellschaft Procédé de refroidissement de turbine à vapeur
EP1785586A1 (fr) * 2005-10-20 2007-05-16 Siemens Aktiengesellschaft Rotor d'une turbomachine
EP1788191A1 (fr) * 2005-11-18 2007-05-23 Siemens Aktiengesellschaft Turbine à vapeur et procédé pour le refroidissement d'une turbine à vapeur
EP2067933A2 (fr) 2007-08-31 2009-06-10 Siemens Aktiengesellschaft Concept de sécurité pour une turbine à vapeur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109826675A (zh) * 2019-03-21 2019-05-31 上海电气电站设备有限公司 汽轮机冷却系统及方法

Also Published As

Publication number Publication date
JP5604684B2 (ja) 2014-10-15
EP2598724A1 (fr) 2013-06-05
EP2598724B1 (fr) 2014-06-04
JP2013531182A (ja) 2013-08-01
CN103052768B (zh) 2015-07-22
WO2012013531A1 (fr) 2012-02-02
CN103052768A (zh) 2013-04-17

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