EP1877650B1 - Turbine a vapeur - Google Patents

Turbine a vapeur Download PDF

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Publication number
EP1877650B1
EP1877650B1 EP06724974A EP06724974A EP1877650B1 EP 1877650 B1 EP1877650 B1 EP 1877650B1 EP 06724974 A EP06724974 A EP 06724974A EP 06724974 A EP06724974 A EP 06724974A EP 1877650 B1 EP1877650 B1 EP 1877650B1
Authority
EP
European Patent Office
Prior art keywords
cover
steam turbine
steam
inner housing
housing
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.)
Active
Application number
EP06724974A
Other languages
German (de)
English (en)
Other versions
EP1877650A1 (fr
Inventor
Henning Almstedt
Stefan Essink
Mark-Andre Schwarz
Rainer Tamme
Andreas Ulma
Kai Wieghardt
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 EP06724974A priority Critical patent/EP1877650B1/fr
Priority to PL06724974T priority patent/PL1877650T3/pl
Publication of EP1877650A1 publication Critical patent/EP1877650A1/fr
Application granted granted Critical
Publication of EP1877650B1 publication Critical patent/EP1877650B1/fr
Active 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
    • 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
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/61—Assembly methods using limited numbers of standard modules which can be adapted by machining
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
    • 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 steam turbine with a double-shell housing, which comprises an outer housing and an inner housing arranged therein, and with a guided through the outer housing connection for supplying and / or discharging steam into the inner housing, wherein the connection designed with a pair of connection openings is, which are formed on the inner housing opposite to each other.
  • a bivalve embodiment of casings on steam turbines is preferably used when expansion of live steam or hot reheated steam occurs in the steam turbine.
  • the expansion takes place in the inner housing, which is surrounded by the outer housing, which receives the expanded steam (exhaust steam).
  • the inner housing is cooled and at the same time carries the majority of the pressure, which makes sense especially at high vapor pressures.
  • a pair of on the inner housing opposite to each other Connection openings provided with associated lines are provided with associated lines. During operation of such a steam turbine, live steam is supplied uniformly through the lines at both connection openings, as a result of which the cutting forces occurring on the inner housing due to the steam supply substantially equalize.
  • DE 18 12 488 A1 discloses a multi-shell axial turbine with outer casing and inner housing split in the axial plane and with live steam inserts guided through the outer and inner casings to the step chamber in a vapor-tight and heat-permeable manner.
  • the object of the invention is to provide a steam turbine which operates economically even with a small steam volume flow, although the steam line connection can be accomplished by means of simple assembly, and in which no large cutting forces occur with steam inflow.
  • this object is achieved with a steam turbine mentioned above, wherein at a first connection opening a line for supplying and / or removing steam can be connected and the second connection opening is closed with a lid. Due to the fact that the connecting opening, which can be provided with the conduit, and the connection openings, which are closed with the lid, are located in each other Inner housing opposite, is similar to the connection of two steam supply lines to the opposite connection openings, a force balance in the inner housing in case of steam flowing through the line causes. The emergence of radial or lateral cutting forces is thereby largely prevented.
  • the steam turbine is characterized in that the cover is designed with a stationary fixation on the outer housing and a heat-movable coupling to the inner housing.
  • a heat-movable coupling on the inner housing can be done by plugging the lid onto a pipe socket of the connection opening with play in the direction of insertion.
  • this relative movement is compensated by the play between the cover and the connection opening.
  • the lid is fixed in place. Since, advantageously, the line for compensating the forces acting on the housing is fastened analogously to the cover at the opposite connection opening, a particularly simple assembly of the steam supply line results. That is, the line is also heat-movable on the inner housing, such as by attaching to a pipe socket coupled to the associated connection opening and fixed to the outer housing stationary. Furthermore, this arrangement results overall in an ideal cushioning of pipe deformation.
  • the closure of the second connection opening with the cover is designed such that the cover at a vapor pressure increase in the inner housing with respect to a force on the inner and / or outer housing substantially as the behaves the line connected to the first opposite port.
  • the connection openings are arranged opposite to each other and thus the forces generated by a vapor pressure increase on the inner housing can be derived substantially symmetrically to the outer housing and the inner housing, the emergence of cutting forces on the inner housing is largely avoided.
  • expedient embodiment of the closure of the second connection opening with the lid is designed such that the lid behaves in thermal deformations of the steam turbine with respect to a force on the inner and / or outer housing substantially as the connected to the first, opposite port opening line. Because the connection openings are arranged opposite one another, the forces caused by thermal deformations on the steam turbine are deflected symmetrically onto the inner housing and / or outer housing, as a result of which cutting forces occurring on the inner housing are largely avoided.
  • the lid is essentially cup-shaped.
  • the cup shape structurally approximates the pipe shape of the pipe.
  • the mechanical behavior between the steam supply pipe and cover is even better adapted to each other, resulting in an optimal force balance effect.
  • the open edge portion of the substantially cup-shaped lid is attached to the outer housing, in particular flanged.
  • the attachment by means of a flange allows a very secure fixation of the cover on the outer housing, whereby the stability of the overall system is increased.
  • the bottom portion of the substantially cup-shaped lid arranged on the inner housing in particular movably sealed. This avoids the escape of steam, which would considerably reduce the efficiency of the steam turbine. Nevertheless, the lid remains movable relative to the inner housing, whereby thermal expansions of the housing material are allowed in the action of steam.
  • a channel for draining the inner and / or outer housing is formed in the lid.
  • This condensate formed in the inner housing or outer housing can be removed from the turbine. Stagnant condensate remaining in the turbine can, due to the different heat transfer, lead to asymmetrical structures or housing deformations. As a result, it can even lead to game bridging in extreme cases.
  • a discharge channel in this area i. in which the lid connected to the introduction opening nearby lid particularly effective for the rapid removal of the condensate.
  • unbalanced housing deformations can be avoided and the mechanical behavior of rotor to stationary housing can be improved. In this way, radial play can be minimized in the mechanical design, which leads to an increase in efficiency.
  • the Fig. I is a sectional view of a steam turbine according to the invention.
  • a shaft 11 which is surrounded by an inner housing 2.
  • This can be axisymmetric, but does not necessarily have to be symmetrical.
  • an outer housing 1 which may also be designed axially symmetric, arranged.
  • live steam or hot steam or exhaust steam which has become hotter can be fed or discharged into the inner casing 2 under high pressure.
  • the shaft 11 is driven. Then, the expanded steam is passed through the cavity between the outer housing 1 and the inner housing 2, whereby a cooling of the inner housing 2 is effected.
  • the steam turbine has a connection 3 for supplying and / or discharging steam into the inner housing 2, which is guided through the outer housing 1 both from the left side and from the right side with reference to the FIGS.
  • This connection 3 has two opposite connection openings 4 and 5 on the inner housing 2.
  • the connection openings 4 and 5 are each carried out with a pipe extension 13 and 14, respectively.
  • the line 6 is attached to the supply and / or discharge of steam.
  • the line 6 is flanged to the outer housing 1 and thus fixed thereto fixed.
  • Relative movements between the inner housing 2 and the outer housing 1, both in the radial and axial directions, such as caused by thermal deformation of the inner housing 1 and by thermal deformation of the conduit 6 are by a heat-resistant seal between the conduit 6 and the first tube extension 13, in the present case executed by means of a first L-ring 12, balanced.
  • the second connection opening 5 opposite the first connection opening 4 is provided with a second pipe extension 14 corresponding to the first pipe extension 13. Then a cup-shaped lid 7 is attached.
  • the cup-shaped cover 7 has a bottom portion 9 for sealing the second connection opening 5 and an open edge portion 8. This open edge portion 8 is flanged to the outer housing 1.
  • the lid 7 is fixed in the same manner as the connecting line 6, namely fixed to the outer housing 1.
  • a ring projection 15 is formed at the bottom of the bottom portion 9, ie on the outside of the cup.
  • This annular shoulder 15 is attached to the second pipe socket 14 of the connection opening 5.
  • a heat-movable seal is provided between the annular shoulder 15 and the second connection opening 5, for compensating for thermal deformations or relative displacements caused by an increase in the internal pressure in the inner housing 2 both in the radial and in the axial direction between the inner and outer housings 2 and 1.
  • This heat-movable seal is carried out in the present case by means of a second L-ring 12 '.
  • the L-rings 12 and 12 simultaneously seal the interior of the inner housing 2 from the intermediate space between the outer housing 1 and the inner housing 2.
  • L-rings 12 and 12 ' it is also possible to use any type of piston rings, corrugated pipe compensators or any other type of seal which simultaneously permits sealing and relative movements between inner housing and outer housing.
  • the cover 7 has a channel 10 for draining the inner housing.
  • the immediate expansion of the introduced through the introduction line 6 into the interior 2 of the steam turbine steam forms a considerable amount of condensed liquid, which is led out through the drainage channel 10 from the interior of the steam turbine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (7)

  1. Turbine à vapeur ayant un carter à deux coques,
    qui comprend un carter ( 1 ) extérieur et un carter ( 2) intérieur disposé à l'intérieur de celui-ci et
    un raccord ( 3 ) passant à travers le carter ( 1 ) extérieur pour apporter de la vapeur dans le carter ( 2 ) intérieur et/ou pour l'en évacuer,
    dans laquelle le raccord est conformé en ayant une paire d'ouvertures ( 4, 5 ) de raccord, qui sont constituées en étant opposées l'une à l'autre sur le carter (2) intérieur,
    dans laquelle sur une première ouverture ( 4 ) de raccord peut être raccordé un conduit ( 6 ) pour l'apport de vapeur et/ou pour l'évacuation de vapeur, tandis que la deuxième ouverture ( 5 ) de raccord est fermée par un couvercle ( 7 ) caractérisé en ce que,
    le couvercle ( 7 ) est formé en ayant une immobilisation à poste fixe sur le carter ( 1 ) extérieur et un accouplement mobile sous l'effet de la chaleur au carter ( 2 ) intérieur.
  2. Turbine à vapeur suivant la revendication 1,
    caractérisée en ce que
    la fermeture de la deuxième ouverture ( 5 ) du raccord par le couvercle ( 7 ) est conformée de manière à ce que le couvercle, lors d'une élévation de la pression de la vapeur dans le carter ( 2 ) intérieur, se comporte, du point de vue de l'application d'une force au carter ( 2, 1 ) intérieur et/ou extérieur, sensiblement comme le conduit (6) raccordé à la première ouverture ( 4 ) opposée du raccord.
  3. Turbine à vapeur suivant la revendication 1 ou 2,
    caractérisée en ce que
    la fermeture de la deuxième ouverture ( 5 ) du raccord par le couvercle ( 7 ) est conformée de manière à ce que le couvercle se comporte, lors de la déformation sous l'effet de la chaleur de la turbine à vapeur du point de vue de l'application d'une force au carter ( 2, 1 ) intérieur et/ou extérieur, sensiblement comme le conduit ( 6 ) raccordé à la première ouverture ( 4 ) opposée du raccord.
  4. Turbine à vapeur suivant l'une des revendications 1 à 3,
    caractérisée en ce que
    le couvercle ( 7 ) est conformée sensiblement en bécher.
  5. Turbine à vapeur suivant la revendication 4,
    caractérisée en ce que
    le segment ( 8 ) de bord ouvert du couvercle (7) sensiblement en forme de bécher est fixé au carter ( 1 ) extérieur en y étant notamment bridé.
  6. Turbine à vapeur suivant la revendication 4 ou 5,
    caractérisée en ce que
    le segment ( 9 ) de fond du couvercle ( 7 ) sensiblement en forme de bécher est disposé sur le carter ( 2 ) intérieur, en y étant notamment rendu étanche de façon mobile.
  7. Turbine à vapeur suivant l'une des revendications 1 à 6,
    caractérisée en ce que
    dans le couvercle (7) est formé un canal (10) pour éliminer l'eau du carter ( 2, 1 ) intérieur et/ou extérieur.
EP06724974A 2005-05-03 2006-03-08 Turbine a vapeur Active EP1877650B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06724974A EP1877650B1 (fr) 2005-05-03 2006-03-08 Turbine a vapeur
PL06724974T PL1877650T3 (pl) 2005-05-03 2006-03-08 Turbina parowa

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05009709A EP1719880A1 (fr) 2005-05-03 2005-05-03 Turbine à vapeur
EP06724974A EP1877650B1 (fr) 2005-05-03 2006-03-08 Turbine a vapeur
PCT/EP2006/060552 WO2006117257A1 (fr) 2005-05-03 2006-03-08 Turbine a vapeur

Publications (2)

Publication Number Publication Date
EP1877650A1 EP1877650A1 (fr) 2008-01-16
EP1877650B1 true EP1877650B1 (fr) 2011-09-28

Family

ID=35044885

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05009709A Withdrawn EP1719880A1 (fr) 2005-05-03 2005-05-03 Turbine à vapeur
EP06724974A Active EP1877650B1 (fr) 2005-05-03 2006-03-08 Turbine a vapeur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05009709A Withdrawn EP1719880A1 (fr) 2005-05-03 2005-05-03 Turbine à vapeur

Country Status (7)

Country Link
US (1) US8192142B2 (fr)
EP (2) EP1719880A1 (fr)
JP (1) JP2008540895A (fr)
CN (1) CN101171402B (fr)
AT (1) ATE526490T1 (fr)
PL (1) PL1877650T3 (fr)
WO (1) WO2006117257A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2551472A1 (fr) * 2011-07-29 2013-01-30 Siemens Aktiengesellschaft Boîtier pour une turbomachine
CN103352731B (zh) * 2013-07-08 2015-01-21 哈尔滨汽轮机厂有限责任公司 一种汽轮机高压双层缸定位键的安装方法
CN115234317A (zh) * 2022-07-20 2022-10-25 上海电气电站设备有限公司 一种三层壳汽轮机进汽结构及汽轮机

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402841A (en) * 1944-06-26 1946-06-25 Allis Chalmers Mfg Co Elastic fluid turbine apparatus
DE852247C (de) * 1950-09-07 1952-10-13 Siemens Ag Dampfzufuehrung bei Dampfturbinen
DE1812488B2 (de) * 1968-12-03 1970-12-23 Siemens AG, 1000 Berlin u. 8000 München Mehrschaliges Gehäuse einer Axialturbine
FR2364326A1 (fr) * 1976-09-14 1978-04-07 Creusot Loire Turbomachine
CH665450A5 (de) * 1983-06-09 1988-05-13 Bbc Brown Boveri & Cie Ventil fuer horizontale dampfzufuehrung an zweigehaeuseturbinen.
DE3522917A1 (de) * 1985-06-27 1987-01-08 Kraftwerk Union Ag Lageranordnung fuer turbomaschinen, insbesondere dampfturbinen
JPH01167403A (ja) * 1987-12-23 1989-07-03 Hitachi Ltd 高圧ケーシング管台閉止板取付部構造
JPH0377367A (ja) 1989-08-21 1991-04-02 Fujitsu Ltd 半導体記憶装置
JP2954797B2 (ja) * 1992-10-05 1999-09-27 株式会社東芝 蒸気タ−ビンの強制冷却装置
DE4425352C2 (de) * 1994-07-18 2001-10-11 Abb Patent Gmbh Dampfturbine mit einem im Gußverfahren hergestellten Turbinengehäuse
JPH1193617A (ja) * 1997-09-22 1999-04-06 Hitachi Ltd 原子炉給水ポンプ駆動用蒸気タービン排気管の据付工法
CN100516469C (zh) * 2003-04-07 2009-07-22 阿尔斯通技术有限公司 涡轮机
US6898935B2 (en) * 2003-07-25 2005-05-31 Bj Services Company System and method of cooling steam turbines
CH698879B1 (de) * 2006-06-30 2009-11-30 Alstom Technology Ltd Strömungsmaschine.

Also Published As

Publication number Publication date
CN101171402A (zh) 2008-04-30
EP1719880A1 (fr) 2006-11-08
US20090196746A1 (en) 2009-08-06
JP2008540895A (ja) 2008-11-20
US8192142B2 (en) 2012-06-05
CN101171402B (zh) 2011-03-09
PL1877650T3 (pl) 2012-02-29
ATE526490T1 (de) 2011-10-15
EP1877650A1 (fr) 2008-01-16
WO2006117257A1 (fr) 2006-11-09

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