EP2274504B1 - Turbine à vapeur dotée d'un dispositif de refroidissement - Google Patents

Turbine à vapeur dotée d'un dispositif de refroidissement Download PDF

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Publication number
EP2274504B1
EP2274504B1 EP09735261A EP09735261A EP2274504B1 EP 2274504 B1 EP2274504 B1 EP 2274504B1 EP 09735261 A EP09735261 A EP 09735261A EP 09735261 A EP09735261 A EP 09735261A EP 2274504 B1 EP2274504 B1 EP 2274504B1
Authority
EP
European Patent Office
Prior art keywords
inner housing
steam
casing
inflow
medium
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.)
Not-in-force
Application number
EP09735261A
Other languages
German (de)
English (en)
Other versions
EP2274504A1 (fr
Inventor
Andreas Ulma
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 PL09735261T priority Critical patent/PL2274504T3/pl
Priority to EP09735261A priority patent/EP2274504B1/fr
Publication of EP2274504A1 publication Critical patent/EP2274504A1/fr
Application granted granted Critical
Publication of EP2274504B1 publication Critical patent/EP2274504B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D25/24—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
    • 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
    • F05D2260/205—Cooling fluid recirculation, i.e. after cooling one or more components is the cooling fluid recovered and used elsewhere for other purposes
    • 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 turbomachine, comprising a rotor, an inner housing arranged around the rotor and an outer housing arranged around the inner housing, wherein a sealingly sealed sheath is arranged around a region of the inner housing.
  • a turbomachine Under a turbomachine is in particular a steam turbine to understand. Steam turbines are divided into so-called high-pressure, medium-pressure or low-pressure turbine sections. A uniform classification of the steam turbine in the aforementioned sub-turbines does not currently exist.
  • a high-pressure turbine section is exposed to steam at a temperature of up to 620 ° C and a pressure of up to 350 bar.
  • the effluent from this high-pressure turbine section steam is reheated to a temperature of up to 620 ° C in a reheater and then flows into the medium-pressure turbine section, with the steam then flows from the medium-pressure turbine section in the low-pressure turbine section.
  • steam turbines are designed with inner housing in the so-called two- or three-shell construction.
  • the inner housing is flowed around with the medium-pressure exhaust steam.
  • this medium-pressure exhaust steam can have comparatively low temperatures, which leads to a comparatively high temperature difference between the inner casing inner wall and the inner casing outer wall.
  • the inner housing inner wall is acted upon by the so-called HZÜ vapor, wherein the inner housing outer wall, as described above, flows around the medium-pressure exhaust steam. Since the temperatures of the medium pressure exhaust steam and the HZÜ steam are comparatively different, this leads to different thermal stresses of the inner housing. The high temperature differences lead to unacceptably high stresses, for example, on the parting screws and the inner housing, which can lead to increased elastic and / or plastic housing deformation.
  • the jacket is often referred to as a thermal protection jacket or as a thermal shield and is arranged around the entire inner housing.
  • the heat protection jacket is designed such that gaps between the heat protection jacket and the inner housing arise. Furthermore, additional openings are arranged in the heat protection jacket to allow a flow of medium-pressure exhaust steam through the heat protection jacket.
  • the disadvantage here is that the actual conditions within the heat protection jacket can hardly be changed. This means that the actual conditions can not be matched to the requirement of the inner housing. It would be desirable here to be able to set the temperature within the heat protection jacket. This means that a specific increase or decrease of the temperature inside the jacket would be an advantage.
  • the U.S. 4,896,499 discloses a turbomachine comprising a rotor and an inner casing arranged around the rotor.
  • the JP 60195304 discloses a turbomachine with a double housing.
  • the object of the invention is to improve a turbomachine such that impermissible temperature differences in the inner housing can be avoided.
  • a turbomachine comprising a rotor, an inner housing arranged around the rotor and an outer housing arranged around the inner housing, wherein a sealing area is provided around a region of the inner housing is arranged closed jacket, wherein the jacket has an inflow for the flow of steam and an outflow for the outflow of steam located in the jacket and the inflow comprises an annular channel.
  • the way is taken to allow a targeted flow of steam in the region of the sheath.
  • the mass flow of the steam in the area of the jacket can be used to change the temperature in this area. This means that for different operating conditions in which different temperatures can occur within the inner housing, the temperature on the inner housing outer surface can be changed.
  • the operating conditions can be changed outside of the inner housing, which is basically to understand the area that is adjacent to the inner housing outer surface.
  • Another advantage of the invention is that, during a start-up or shutdown, the temperatures on the inner shell outer surface can be adjusted, whereby a temperature gradient can be adjusted in the inner housing, which leads to unacceptably high stresses on parting screws and the inner housing can be avoided.
  • the annular channel is arranged around the sheath.
  • a continuous annular channel is realized, that is, the steam is supplied to the annular channel via an outer inflow line and this steam in the annular channel completely surrounds the sheath and ensures through holes a flow of steam into the space within the sheath.
  • separate inflow lines must be provided for each partial ring channel.
  • several inflow channels can be performed to the annular channel.
  • the sheath is made of sheet metal.
  • steel sheet can be used here.
  • the temperature conditions in the turbomachine must be such that sheets or steel sheets can be used.
  • care must be taken that the temperatures of the medium-pressure exhaust steam do not lead to damage to the sheets or steel sheets.
  • the sheath is sealingly formed with respect to the inner housing.
  • the inflow of the steam into the interior of the casing is achieved by drilling, in particular radial bores. Due to the arrangement, size and number of holes a targeted, uniform inflow into the space of the sheath can be achieved.
  • the casing is arranged in the region of the inflow region.
  • the inflow area is the most thermally stressed area. This means that especially in this area, the inner housing thermally loaded inadmissible becomes.
  • the Abdampf Colour the inner housing is this comparatively little thermal stress.
  • a jacket of the complete inner housing is therefore not required. Rather, it is expedient to encase only the areas that are particularly subject to thermal stress and where an impermissible temperature gradient between the inner housing inner surface and the inner housing outer surface is to be avoided.
  • This area is just the inflow area, which is why it is proposed in this advantageous embodiment, to coat just this inflow.
  • the outflow has a plurality of radial bores in the casing. This makes it possible to easily remove the steam exiting the jacket, which of course has other thermodynamic parameters such as temperature and pressure than the steam flowing into the jacket. On the arrangement, size and number of radial bores, a targeted and uniform outflow from the shell can be achieved.
  • a heat-movable seal may be arranged between the sheath and the inner housing.
  • Steam turbines are usually continuously supplied with steam, resulting in a uniform temperature distribution within the steam turbine.
  • operating conditions exist such.
  • the sheath made of steel sheets may have a different thermal expansion compared to the inner housing, which may lead to a distortion of the sheath or to an undesirable gap between the sheath and the inner housing.
  • the invention is based on the FIGS. 1 and 2 described in more detail.
  • the FIG. 1 shows a cross-sectional view in the axial direction of a medium-pressure turbine section 11.
  • the medium-pressure turbine section 11 comprises a substantially rotationally symmetrical about the rotation axis 12 formed inner housing 6, wherein the inner housing 6 consists of an inner housing upper part 6a and an inner housing lower part 6b.
  • the inner housing upper part 6a is connected to the inner housing lower part 6b via a flange 13 and via screws not shown.
  • the other components such. B. a rotor 14, not shown in detail.
  • an outer housing 15 is arranged.
  • a jacket 1 is arranged around the inner housing 6.
  • the casing 1 may be formed from steel sheets and may be arranged on the inner casing 6 via heat-resistant seals 16.
  • the medium-pressure exhaust steam which has a substantially lower temperature and a substantially lower pressure compared to the incoming into the medium-pressure steam turbine 11 live steam. This medium-pressure exhaust steam is prevented via the casing 1 from acting on an inner housing outer surface 17.
  • the casing 1 further comprises an annular channel 18, through which an annular space 2 is formed and this is fluidically connected to an inflow channel 10.
  • the steam supplied via the inflow 10 can also be conducted directly into the space 5.
  • For better distribution over the circumference of the annular space 2 is provided.
  • FIG. 2 shows a cross-sectional view of the medium-pressure turbine section 11.
  • the largest thermally loaded area of this medium-pressure turbine section 1 is the area around the inflow 20.
  • the sheath 1 is not disposed over the entire inner housing, but to the inflow region 20, since this is the most thermally stressed.
  • the annular channel 18 is also not formed over the entire axial length of the casing 1, but only in a smaller axial extent.
  • the annular space 18 is in the embodiment according to FIG. 2 arranged on the left of the line 22 at the edge of the casing 1 and extends over approximately one quarter of the axial length 21 of the casing 1.
  • the emerging from the holes 4 steam has other thermodynamic parameters such. B. temperature and pressure as the incoming into the bore 3 steam.
  • B. temperature and pressure as the incoming into the bore 3 steam.
  • the steam flowing through the inflow passage 10 in the annular space 2, z. B. be taken from a so-called cold reheat.
  • the casing 1 can be formed such that the pressures in the inflow 10, in the annular space 2 and in the space 5 only slightly are larger than in Abdampfraum 9, which means that the casing 1 must not be designed to support pressure.
  • the supply of steam into the annular space 2 and finally into the space 5 leads to an influence on the temperature and the flow conditions on the inner housing surface 17, which can be influenced by the temperature and the mass flow of the supplied steam into the inflow passage 10. This can be done via a fixed setting or via a control. In addition, a homogenization of the temperature distribution can be achieved.
  • an improvement of the deformation behavior of the inner housing 6 is achieved, whereby a reduced radial play demand takes place. This reduces stresses on the housing and on the screws, which also minimizes plastic deformation caused by material creep.

Landscapes

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

Claims (6)

  1. Turbomachine ( 11 ),
    comprenant un rotor ( 14 ), un carter ( 6 ) intérieur disposé autour du rotor ( 14 ), ainsi qu'un carter ( 15 ) extérieur disposé autour du carter ( 6 ) intérieur,
    dans laquelle une enveloppe ( 1 ) fermée de manière étanche est disposée autour d'une partie du carter ( 6 ) intérieur, l'enveloppe ( 1 ) ayant une entrée pour l'entrée de vapeur et une sortie pour la sortie de vapeur se trouvant dans l'enveloppe ( 1 ),
    caractérisée en ce que
    l'entrée comprend un canal ( 18 ) annulaire.
  2. Turbomachine ( 11 ) suivant la revendication 1,
    dans laquelle l'enveloppe ( 1 ) est en tôle.
  3. Turbomachine ( 11 ) suivant la revendication 1 ou 2, dans laquelle l'enveloppe ( 1 ) est constituée de manière étanche par rapport au carter ( 6 ) intérieur.
  4. Turbomachine ( 11 ) suivant l'une des revendications précédentes,
    dans laquelle l'enveloppe ( 1 ) est disposée dans la partie d'une zone ( 20 ) d'afflux.
  5. Turbomachine ( 11 ) suivant l'une des revendications précédentes,
    dans laquelle plusieurs entrées sont réparties sur le pourtour de l'enveloppe ( 1 ).
  6. Turbomachine ( 11 ) suivant l'une des revendications précédentes,
    dans laquelle l'évacuation comporte plusieurs trous ( 3, 4 ) radiaux dans l'enveloppe ( 1 ).
EP09735261A 2008-04-21 2009-02-27 Turbine à vapeur dotée d'un dispositif de refroidissement Not-in-force EP2274504B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL09735261T PL2274504T3 (pl) 2008-04-21 2009-02-27 Turbina parowa z urządzeniem schładzającym
EP09735261A EP2274504B1 (fr) 2008-04-21 2009-02-27 Turbine à vapeur dotée d'un dispositif de refroidissement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08007704A EP2112335A1 (fr) 2008-04-21 2008-04-21 Turbine à vapeur dotée d'un dispositif de refroidissement
PCT/EP2009/052382 WO2009130077A1 (fr) 2008-04-21 2009-02-27 Turbine à vapeur avec dispositif de refroidissement
EP09735261A EP2274504B1 (fr) 2008-04-21 2009-02-27 Turbine à vapeur dotée d'un dispositif de refroidissement

Publications (2)

Publication Number Publication Date
EP2274504A1 EP2274504A1 (fr) 2011-01-19
EP2274504B1 true EP2274504B1 (fr) 2013-01-30

Family

ID=39650455

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08007704A Withdrawn EP2112335A1 (fr) 2008-04-21 2008-04-21 Turbine à vapeur dotée d'un dispositif de refroidissement
EP09735261A Not-in-force EP2274504B1 (fr) 2008-04-21 2009-02-27 Turbine à vapeur dotée d'un dispositif de refroidissement

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08007704A Withdrawn EP2112335A1 (fr) 2008-04-21 2008-04-21 Turbine à vapeur dotée d'un dispositif de refroidissement

Country Status (8)

Country Link
US (1) US8740555B2 (fr)
EP (2) EP2112335A1 (fr)
JP (1) JP5279893B2 (fr)
KR (1) KR101266896B1 (fr)
CN (1) CN102016239B (fr)
PL (1) PL2274504T3 (fr)
RU (1) RU2477802C2 (fr)
WO (1) WO2009130077A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140119886A1 (en) * 2012-10-31 2014-05-01 General Electric Company Turbine cowling system
PL2957729T3 (pl) * 2014-06-16 2020-01-31 Siemens Aktiengesellschaft Turbina parowa z ulepszoną obudową wydechową

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1197096B (de) * 1958-02-14 1965-07-22 Licentia Gmbh Mehrschalige Turbine fuer hoechste Druecke und Temperaturen
SU129660A1 (ru) * 1959-10-19 1959-11-30 турбинный Завод им. С.М. Кирова Харьковский Цилиндр многоступенчатой паровой турбины на сверхкритические параметры пара
DE1401036A1 (de) * 1959-10-28 1969-01-09 Prvnibrnenska Strojirna Zd Y K Fuer hohe Temperaturen des Arbeitsmediums geeignete Waermeturbine mit einem Innen- und einem Aussengehaeuse
SU140808A1 (ru) 1961-04-03 1961-11-30 Г.И. Павловский Устройство дл дополнительного прогрева корпусов паровых турбин
DE2049430A1 (de) 1970-04-07 1971-10-28 Bergmann Borsig Veb Geschweißtes Niederdruckgehäuse für eine zweiflutige Dampfturbine
US4896499A (en) * 1978-10-26 1990-01-30 Rice Ivan G Compression intercooled gas turbine combined cycle
JPS58140408A (ja) * 1982-02-17 1983-08-20 Hitachi Ltd 蒸気タ−ビンの冷却装置
JPS59144256A (ja) 1983-02-07 1984-08-18 Nec Corp 加入者情報変更方式
SU1129660A1 (ru) 1983-04-18 1984-12-15 Запорожский Ордена "Знак Почета" Машиностроительный Институт Им.В.Я.Чубаря Электроввод в сосуд высокого давлени
SU1126027A1 (ru) 1983-08-26 1985-06-07 Производственное Объединение Турбостроения "Ленинградский Металлический Завод" Цилиндр паровой турбины
JPS60159310A (ja) * 1984-01-30 1985-08-20 Hitachi Ltd 蒸気タ−ビンの二重ケ−シングの熱応力制御装置
JPS60195304A (ja) * 1984-03-19 1985-10-03 Hitachi Ltd 蒸気タ−ビンケ−シングの熱応力制御装置
DE3420389A1 (de) * 1984-06-01 1985-12-05 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Doppelmantelgehaeuse von turbinen
JPH0248642Y2 (fr) * 1984-09-26 1990-12-20
US5205115A (en) * 1991-11-04 1993-04-27 General Electric Company Gas turbine engine case counterflow thermal control
JPH0960502A (ja) * 1995-08-23 1997-03-04 Mitsubishi Heavy Ind Ltd ガスエキスパンダー
FR2766232B1 (fr) 1997-07-18 1999-08-20 Snecma Dispositif de refroidissement ou d'echauffement d'un carter circulaire
EP1105623B1 (fr) * 1998-08-18 2003-05-28 Siemens Aktiengesellschaft Carter de turbine

Also Published As

Publication number Publication date
US20110116915A1 (en) 2011-05-19
JP5279893B2 (ja) 2013-09-04
CN102016239B (zh) 2015-04-22
US8740555B2 (en) 2014-06-03
KR20100135933A (ko) 2010-12-27
PL2274504T3 (pl) 2013-06-28
CN102016239A (zh) 2011-04-13
JP2011518277A (ja) 2011-06-23
EP2274504A1 (fr) 2011-01-19
RU2010147407A (ru) 2012-05-27
RU2477802C2 (ru) 2013-03-20
EP2112335A1 (fr) 2009-10-28
KR101266896B1 (ko) 2013-05-24
WO2009130077A1 (fr) 2009-10-29

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