EP0852659B1 - Element d'etancheite pour l'obturation d'un espace et installation a turbine a gaz - Google Patents

Element d'etancheite pour l'obturation d'un espace et installation a turbine a gaz Download PDF

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Publication number
EP0852659B1
EP0852659B1 EP96942252A EP96942252A EP0852659B1 EP 0852659 B1 EP0852659 B1 EP 0852659B1 EP 96942252 A EP96942252 A EP 96942252A EP 96942252 A EP96942252 A EP 96942252A EP 0852659 B1 EP0852659 B1 EP 0852659B1
Authority
EP
European Patent Office
Prior art keywords
sealing element
sealing
component
gap
gas 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.)
Expired - Lifetime
Application number
EP96942252A
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German (de)
English (en)
Other versions
EP0852659A2 (fr
Inventor
Mirko Milazar
Friedhelm TERSCHÜREN
Alfred Lienert
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0852659A2 publication Critical patent/EP0852659A2/fr
Application granted granted Critical
Publication of EP0852659B1 publication Critical patent/EP0852659B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements

Definitions

  • the invention relates to a sealing element for sealing a Gap, which between two thermally movable against each other Components with a respective opposite one another Component groove can be formed, especially in a gas turbine plant and a gas turbine system with sealing elements.
  • thermomechanical machines and chemical plants where different Fluids are used this may be necessary Keep fluids separate from one another within the systems.
  • thermal combustion plants Flow areas of hot combustion gases from flow areas to separate low-temperature cooling gases.
  • gas turbine plants with high turbine inlet temperatures, of, for example, over 1000 ° C thermal expansions occur of the individual components of the gas turbine system, so that to avoid high thermal stresses and cracking neighboring components partly through a gap are spaced from each other.
  • Such columns can be connections between flow areas of hot gases with flow areas represent cold gases. The influx of cold Reduce gas in the flow area of hot gases and thereby the temperature in the flow area of the hot In order not to lower gases, it is advantageous to seal the gaps.
  • each a gas turbine with an outer casing and a two-part Describing the inner housing is corresponding to the seal a gap between the two inner housings Sealing element with a cross section of an elongated C's specified. Is between the inner case and the outer case an annular gap is formed through which cooling fluid is passed. The hot gas flows to the drive inside the inner housing the gas turbine.
  • a gas turbine system is described in US Pat. No. 4,537,024, in the components of a nozzle structure with axial and radial sealing elements are sealed.
  • the sealing elements should prevent that flowing through the nozzle structure Hot gas reaches turbine areas outside the hot gas duct.
  • a sealing element can have approximately the shape in cross section have a compressed eight.
  • US Pat. No. 1,816,293 relates to the tight connection of two Superheated steam pipes. This vapor-tight connection is made by a tight screwing of two flanges.
  • the Flanges each have an annular sealing surface on that is serrated.
  • the teeth of the pressed together Sealing surfaces are deformed to have an increased sealing effect achieve.
  • a sealing ring inserted, which is toothed on both sides and by which the same sealing effect is achieved.
  • the object of the invention is a sealing element for sealing a gap that is thermally free between two against each other movable components can be formed, specify which an effective seal even in the event of thermal expansion of the components ensured.
  • Another task lies in the specification a gas turbine plant in which a hot gas-carrying area area leading from a cooling fluid, in particular cooling air is effectively sealed.
  • the first-mentioned object is achieved by a Sealing element for sealing a gap which between two thermally movable components with one respective mutually opposite component groove can be formed is solved, which is directed along a main line and in a cross section substantially perpendicular to the main line is directed along a center line, a first End and a second end opposite this and a has serrated between the ends of the central region is.
  • the sealing element By serrating the sealing element, it is the one hand Adaptable shape of each component groove, so that it is sealing abuts in each component groove, and on the other hand deformable is, causing thermal expansion of the components can follow. Thus, the gap continues to be sealed and inadmissible thermal stresses avoided.
  • the material of the sealing element is this for use at high temperatures of over 1000 ° C usable. It is therefore preferably suitable in a thermal Internal combustion engine, in particular a gas turbine system.
  • the sealing element is preferably in at least at the ends deformable in a direction substantially orthogonal to the center line. This ensures that a thermal Expansion of the component groove in the direction of the center line of the sealing element, the ends of this thermal expansion can follow and thus the sealing element tight in the component grooves is present without inadmissibly high thermal voltages cause. This is an almost backlash-free connection between the components and the sealing element. Due to the deformability of the sealing element is also still ensures the mobility of the components against each other.
  • the center line of the sealing element is preferably a center axis, so that the sealing element is essentially flat. It can be made from a substantially flat sheet with a predetermined Wall thickness simple and on an industrial scale with corrugated (serrated) surface can be produced.
  • the sealing element preferably has sealing grooves that face each other the center line at an angle of 50 ° are inclined up to 90 °.
  • the sealing grooves preferably run essentially towards the main line. Through the sealing grooves the sealing element receives a profile, which a deformability both orthogonally and in the direction the center line guaranteed. Especially with a non-orthogonal one Course of the sealing grooves, i.e. at an angle of inclination less than 90 ° from the center line, becomes deformable in the substantially orthogonal direction to the center line guaranteed.
  • the Angle of inclination of the sealing grooves at the ends is smaller than in The central region. This ensures that the sealing element especially at the ends protruding into the component grooves can follow the thermal expansion of the components well, so a particularly good seal is achieved.
  • the sealing element has a first surface and a second Surface that run between the ends and in Are opposite to each other with respect to the center line.
  • the the first surface is preferably serrated and the second Surface smooth.
  • the toothed surface preferably the cooling gas area and the smooth surface facing the hot gas area.
  • the sealing element preferably tapers from the central region towards the respective ends. Because the ends in a respective Project component groove and thermal expansion of the components against each other the gap between them is reduced, the sealing element penetrates with increasing temperatures further into a respective component groove. Through the Tapering towards the ends becomes with a rising temperature achieved that the sealing element is even closer in the respective Component groove rests and thus the sealing of the Gap is further improved.
  • the sealing element is preferably suitable for sealing a Gaps in a gas turbine plant with a hot gas Area and a cooling gas area to be sealed therefrom for cooling guide vanes of the gas turbine system. It is arranged so that it is on the one hand in a component groove of a first component, in particular a guide vane or a wall component of the gas turbine system, and on the other hand into a component groove adjacent to the first component second component, in particular a further guide vane or a wall component engages, wherein between the components a gap is formed.
  • the main axis of the gas turbine system is alternately guide vanes and blades arranged, the guide vanes with their guide vane plates on the housing of the gas turbine system are attached and between the vane and the Housing an area for guiding cooling gas is provided.
  • the cooling gas area borders each guide vane in the axial direction a wall component separating from the hot gas-carrying area the gas turbine plant.
  • Between this and in particular the vane plate is formed a gap that is preferably sealed by the sealing element.
  • In the circumferential direction of the gas turbine system are each guide vanes arranged and by a respective gap from each other spaced.
  • the wall components are in the area of the blades arranged, also by a corresponding Gap are spaced apart.
  • the column between neighboring ones Guide vanes and adjacent wall components are preferably sealed by a sealing element.
  • a sealing element is preferably also suitable for sealing of a gap between two components, the component grooves have, which itself away from the gap into the components rejuvenate.
  • the degree of rejuvenation, especially a corresponding one Bevel angle, is preferably the operating temperature adapted to the gas turbine plant.
  • a gas turbine plant Object achieved in that between each other in the circumferential direction neighboring components spaced apart by a gap, which is a hot gas area from a cooling fluid area separate, a sealing element with a serrated (corrugated) surface is inserted into corresponding grooves of the components.
  • the hot gas area becomes the normal during operation Gas turbine plant of hot gas (up to over 1000 ° C) and the Cooling fluid area is preferably flowed through by cooling air axially spaced components, vane plate and a wall component arranged opposite a rotor blade, by a hollow body, in particular dumbbell- or eight-shaped, sealing element sealed.
  • FIG 1 is directed along a major axis 14
  • Gas turbine system 22 shown. This shows in a housing 17 alternating guide vanes 12 and in the axial direction Blades 15 on.
  • the guide vanes 12 are along one Axis 18 directed perpendicular to the main axis 14 and along the circumference of the gas turbine system 22 arranged to form a circle.
  • the guide vanes 12 are via a respective guide vane plate 16 with the housing 17 of the gas turbine system 22 connected.
  • Adjacent guide vanes are located along the circumference 12 spaced from each other by a respective gap 5 (see Fig. 2), which means that they are largely free thermally can expand.
  • the guide vane plate 16 separates one the main axis 14 of the gas turbine system 22 formed hot gas area 11 from one between the guide vane plate 16 and the turbine housing 17 formed cooling gas region 8.
  • Die Rotor blades 15 are along a respective main axis 19 stretched, which are also substantially orthogonal to Main axis 14 of the gas turbine system are.
  • the blades 15 lie completely in the hot gas area 11.
  • This hot gas area 11 is formed by a plurality of wall components 13 along the circumference of the gas turbine plant 22 from the cooling air area 8 separated.
  • the wall components 13 are here in each case adjacent to the blades 15.
  • the wall components 13 are connected to the turbine housing 17. The clarity for the sake of being only one guide blade 12, a moving blade 15 and a wall component 13 are shown.
  • This gap 5 is through a Sealing element 1 sealed, thereby largely a flow of cooling gas from the cooling gas area 8 into the hot gas area 11 is prevented.
  • the guide vane 12 provides here a first component 2a and the wall part 13 a second component 2b.
  • the Cooling gas area 8 from the hot gas area 11 between adjacent ones Guide vanes 12 and wall components 13 and in the circumferential direction each have a seal between adjacent guide vanes 12 and accordingly between adjacent wall components 13th
  • FIG. 2 shows a cross section along the circumference of the Gas turbine plant 22 and in particular on an enlarged scale two adjacent components 2a, 2b, which are separated by a gap 5 are spaced from each other.
  • the components 2a, 2b can each two adjacent guide vanes 12, in particular guide vane plates 16, as well as two adjacent wall components 13.
  • a component groove 3a or 3b is provided in the components 2a, 2b is in the circumferential direction.
  • a component groove 3a or 3b is provided in the Component grooves 3a, 3b sealingly engage the gap 5 with a sealing element 1 with a toothed contour.
  • the sealing element 1 is along a main line 21 directed and points in the illustrated Cross section perpendicular to the main line 21 a first End 6a, a second end 6b and an intermediate one Middle area 10.
  • the sealing element 1 faces the cooling gas area 8 executes a plurality of sealing grooves 7 on, between adjacent sealing grooves 7 each a sealing tip (sealing tooth) 20 is formed, the sealing to the corresponding component groove 3a, 3b abuts. Because usually the pressure of the cooling gas is higher than the pressure of the hot gas The sealing element 1 is located in the hot gas-carrying region 11 with its smooth surface on the component grooves 3a, 3b, so that the sealing tips 20 from a mechanical load are largely relieving. This will wear the Sealing element 1 significantly reduced.
  • the hot gas-carrying area 11 is the smooth one Surface 9b and the cooling gas area 8 the profiled surface 9a with sealing grooves 7 and sealing tips in between 20 facing.
  • the sealing element 1 tapers from its central region 10 towards the respective ends 6a, 6b.
  • the component groove 3a also tapers from the gap 5 in the component 2a, the guide vane plate 16 into it.
  • the sealing grooves 7 have compared to a center line 4, which in particular a main axis 4a of the sealing element 1, one Angle of inclination ⁇ . This angle of inclination ⁇ is in the middle range at about 90 °, so that there the sealing grooves 7 in run essentially orthogonal to the center line 4.
  • a sealing element 1 with sealing grooves 7 is preferably used for Sealing a gap between adjacent guide vanes 12 or adjacent wall components 13 on the circumference of the gas turbine system.

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

Abstract

L'invention concerne un élément d'étanchéité (1) pour l'obturation d'un espace (5) pouvant se former entre deux composants (2a, 2b) susceptibles de se déplacer l'un par rapport à l'autre par suite d'un effet thermique, chacun d'eux présentant une rainure, de telle sorte que les rainures formées (3a, 3b) soient mutuellement opposées. En coupe transversale, l'élément d'étanchéité (1) est orienté sensiblement perpendiculairement à une ligne principale (21), le long d'un axe (4); il présente une première extrémité (6a), une deuxième extrémité (6b) opposée à la précédente, ainsi qu'une partie centrale (10) située entre lesdites extrémités, et est muni d'une denture. L'élément d'étanchéité (1) convient particulièrement bien pour l'obturation d'un espace (5) entre des aubes directrices (12), à haute température, dans une installation à turbine à gaz (22), en vue d'empêcher l'écoulement gazeux d'une zone de gaz froid (8) vers une zone de gaz chaud (11).

Claims (11)

  1. Elément (1) d'étanchéité pour l'obturation d'un intervalle (5), qui peut se former entre deux éléments (2a, 2b) mobiles l'un par rapport à l'autre sous l'effet de la chaleur et comportant respectivement une gorge (3a, 3b), qui est dirigée le long d'une ligne (21) principale et qui a dans une section transversale sensiblement perpendiculaire à la ligne principale une partie (10) intermédiaire interposée entre une première extrémité (6a) et une deuxième extrémité (6b),
       caractérisé en ce que la partie (10) intermédiaire a une première surface (9a) qui est dentée.
  2. Elément (1) d'étanchéité suivant la revendication 1, ayant une deuxième surface (9a) qui est lisse et qui est opposée par rapport à la ligne (4) médiane à la première surface (9a).
  3. Elément (1) d'étanchéité suivant la revendication 1 ou 2, comprenant une multiplicité de gorges (7) d'étanchéité qui font respectivement un angle (α) d'inclinaison de 50° à 90° avec la ligne (4) médiane.
  4. Elément (1) d'étanchéité suivant la revendication 4, dans lequel les gorges (7) d'étanchéité sont inclinées en s'élevant vers la partie (10) intermédiaire.
  5. Elément (1) d'étanchéité suivant la revendication 3 ou 4, dans lequel les gorges (7) d'étanchéité ont, aux extrémités (6a, 6b), un angle (α) d'inclinaison plus petit que dans la partie (10) intermédiaire, angle (α) d'inclinaison qui est égal dans la partie intermédiaire, notamment à 90°.
  6. Elément (1) d'étanchéité suivant l'une des revendications précédentes, qui se rétrécit de la partie (10) intermédiaire aux extrémités (6a, 6b).
  7. Elément (1) d'étanchéité suivant l'une des revendications précédentes, dans une installation (22) de turbine à gaz comprenant une partie (11) pour du gaz chaud et une partie (8) pour du gaz de refroidissement qui doit en être séparée de manière étanche et qui est destinée à refroidir des aubes (12) directrices de l'installation (22) de turbine à gaz, qui pénètre dans une gorge (3a) d'un premier élément (2a) et dans une gorge (3b) d'un deuxième élément (2b) adjacent au premier élément (2a), notamment d'une aube (12) directrice ou d'un élément (13) de paroi, avec formation d'un intervalle (5) entre les éléments (2a, 2b).
  8. Elément (1) d'étanchéité suivant la revendication 7, dans lequel l'extrémité (6a, 6b) à introduire dans la gorge (3a, 3b) respective est légèrement plus grande que la gorge (3a, 3b).
  9. Elément (1) d'étanchéité suivant la revendication 7 ou 8, qui pénètre dans une gorge (3a, 3b) qui se rétrécit au fur et à mesure que l'on s'éloigne de l'intervalle (5) et que l'on va vers les éléments (12, 13).
  10. Elément (1) d'étanchéité suivant la revendication 7, 8 ou 9, dans lequel la première surface (9a) est tournée vers la partie (8) pour le gaz de refroidissement.
  11. Installation (22) de turbine à gaz ayant une partie (11) pour du gaz chaud et une partie (8) pour du gaz de refroidissement qui doit en être séparée d'une manière étanche et qui est destinée à refroidir des aubes (12) directrices, les parties (8, 11) étant séparées l'une de l'autre par une multiplicité d'éléments (2a, 2b) disposés dans la direction périphérique et dans la direction axiale et au moins un premier élément (2a) et un deuxième élément (2b) étant séparés l'un de l'autre dans la direction périphérique par un intervalle (5) et comportant respectivement une gorge (3a, 3b) qui est ménagée dans les éléments et qui est tournée vers l'intervalle (5),
       caractérisée en ce qu'un élément (1) d'étanchéité denté est disposé de manière à obturer l'intervalle dans la gorge (3a, 3b).
EP96942252A 1995-09-29 1996-09-27 Element d'etancheite pour l'obturation d'un espace et installation a turbine a gaz Expired - Lifetime EP0852659B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19536535 1995-09-29
PCT/DE1996/001861 WO1997012125A2 (fr) 1995-09-29 1996-09-27 Element d'etancheite pour l'obturation d'un espace et installation a turbine a gaz
DE19536535 1999-09-29

Publications (2)

Publication Number Publication Date
EP0852659A2 EP0852659A2 (fr) 1998-07-15
EP0852659B1 true EP0852659B1 (fr) 2002-04-03

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EP96942252A Expired - Lifetime EP0852659B1 (fr) 1995-09-29 1996-09-27 Element d'etancheite pour l'obturation d'un espace et installation a turbine a gaz

Country Status (6)

Country Link
US (1) US5975844A (fr)
EP (1) EP0852659B1 (fr)
JP (1) JP3898225B2 (fr)
DE (1) DE59609029D1 (fr)
RU (1) RU2162556C2 (fr)
WO (1) WO1997012125A2 (fr)

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DE102013205031A1 (de) 2013-03-21 2014-09-25 Siemens Aktiengesellschaft Dichtelement zur Dichtung eines Spaltes
WO2014146955A1 (fr) 2013-03-21 2014-09-25 Siemens Aktiengesellschaft Élément d'étanchéité pour étancher une fente
WO2014146866A1 (fr) 2013-03-20 2014-09-25 Siemens Aktiengesellschaft Élément d'étanchéité permettant d'assurer l'étanchéité d'une fente et turbine à gaz correspondante
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* Cited by examiner, † Cited by third party
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EP2407641A1 (fr) 2010-07-13 2012-01-18 Siemens Aktiengesellschaft Elément d'étanchéité pour étanchéifier une fente et agencement d'étanchéité
WO2012007158A1 (fr) 2010-07-13 2012-01-19 Siemens Aktiengesellschaft Élément d'étanchéité servant à rendre étanche une fente
WO2012007506A1 (fr) 2010-07-13 2012-01-19 Siemens Aktiengesellschaft Ensemble d'étanchéité servant à rendre étanche une fente et élément d'étanchéité associé
US9382846B2 (en) 2010-07-13 2016-07-05 Siemens Aktiengesellschaft Sealing element for sealing a gap
WO2014146866A1 (fr) 2013-03-20 2014-09-25 Siemens Aktiengesellschaft Élément d'étanchéité permettant d'assurer l'étanchéité d'une fente et turbine à gaz correspondante
DE102013205031A1 (de) 2013-03-21 2014-09-25 Siemens Aktiengesellschaft Dichtelement zur Dichtung eines Spaltes
WO2014146955A1 (fr) 2013-03-21 2014-09-25 Siemens Aktiengesellschaft Élément d'étanchéité pour étancher une fente
DE102013205028A1 (de) 2013-03-21 2014-09-25 Siemens Aktiengesellschaft Dichtelement zur Dichtung eines Spaltes
WO2014146954A1 (fr) 2013-03-21 2014-09-25 Siemens Aktiengesellschaft Élément d'étanchéité servant à rendre étanche un interstice
WO2015132012A1 (fr) 2014-03-07 2015-09-11 Siemens Aktiengesellschaft Carter de turbine comprenant un ensemble de joints d'étanchéité servant à rendre étanche une fente entre deux composants reposant à plat l'un contre l'autre côté fente à température ambiante
EP2915960A1 (fr) 2014-03-07 2015-09-09 Siemens Aktiengesellschaft Système de joint permettant d'étanchéifier une fente entre deux composants reposant à plat l'un contre l'autre à température ambiante
WO2015132013A1 (fr) 2014-03-07 2015-09-11 Siemens Aktiengesellschaft Dispositif d'étanchéité pour réaliser l'étanchéité au niveau d'une fente ménagée entre deux composants qui sont disposés à plat l'un contre l'autre côté fente à la température ambiante
EP2915959A1 (fr) 2014-03-07 2015-09-09 Siemens Aktiengesellschaft Système de joint permettant d'étanchéifier une fente entre deux composants reposant à plat l'un contre l'autre à température ambiante
CN106103905A (zh) * 2014-03-07 2016-11-09 西门子股份公司 用于密封在室温下在间隙侧彼此平靠的两个部件之间的间隙的密封装置
US10202861B2 (en) 2014-03-07 2019-02-12 Siemens Aktiengesellschaft Sealing arrangement for sealing a gap between two components which bear flat against one another on the gap side at room temperature
EP3000983A1 (fr) 2014-09-29 2016-03-30 Siemens Aktiengesellschaft Système de joint permettant d'étanchéifier une fente entre deux composants reposant à plat l'un contre l'autre à température ambiante et son procédé de montage et de démontage
WO2016050640A1 (fr) 2014-09-29 2016-04-07 Siemens Aktiengesellschaft Dispositif d'étanchéité pour rendre étanche une fente ménagée entre deux composants en appui à plat l'un contre l'autre côté fente à température ambiant et procédé de montage et démontage d'un tel dispositif d'étanchéité
EP4074941A1 (fr) 2021-04-13 2022-10-19 Siemens Energy Global GmbH & Co. KG Élément de bande d'étanchéité et agencement d'étanchéité comprenant ledit élément de bande d'étanchéité
WO2022218735A1 (fr) 2021-04-13 2022-10-20 Siemens Energy Global GmbH & Co. KG Élément de bande d'étanchéité et agencement d'étanchéité comprenant ledit élément de bande d'étanchéité
EP4137670A1 (fr) 2021-08-19 2023-02-22 Siemens Energy Global GmbH & Co. KG Dispositif d'étanchéité avec butée mobile
WO2023020748A1 (fr) 2021-08-19 2023-02-23 Siemens Energy Global GmbH & Co. KG Dispositif d'étanchéité à butée mobile

Also Published As

Publication number Publication date
EP0852659A2 (fr) 1998-07-15
JPH11511535A (ja) 1999-10-05
WO1997012125A3 (fr) 1997-06-19
WO1997012125A2 (fr) 1997-04-03
JP3898225B2 (ja) 2007-03-28
RU2162556C2 (ru) 2001-01-27
DE59609029D1 (de) 2002-05-08
US5975844A (en) 1999-11-02

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