EP1593814A1 - Arrangement des languettes d'étanchéité pour une virole d'une turbine à gaz - Google Patents
Arrangement des languettes d'étanchéité pour une virole d'une turbine à gaz Download PDFInfo
- Publication number
- EP1593814A1 EP1593814A1 EP05290784A EP05290784A EP1593814A1 EP 1593814 A1 EP1593814 A1 EP 1593814A1 EP 05290784 A EP05290784 A EP 05290784A EP 05290784 A EP05290784 A EP 05290784A EP 1593814 A1 EP1593814 A1 EP 1593814A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axial
- radial
- slot
- segments
- tongue
- 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.)
- Granted
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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 present invention relates to the general field of fixed ring assemblies of a gas turbine. It aims more particularly fixed ring assemblies of a high pressure turbine turbomachines consisting of a plurality of joined segments end to end with interposition of sealing tabs.
- the rotor blades are surrounded by a fixed ring assembly forming an envelope.
- the fixed ring set so defines one of the walls of the hot gas flow vein from the combustion chamber of the turbomachine and through the turbine.
- the fixed ring assembly consists of a turbine ring attached to the turbine housing by means of a spacer.
- the ring and the spacer of such a fixed ring assembly are sectorised, ie they each consist of a plurality of segments joined end to end.
- the fixed ring assembly thus defined being directly in contact with the hot gases from the combustion chamber, it is necessary to cool the different segments that compose it.
- air taken from the chamber bottom circulates in a circuit of cooling arranged in each segment of the ring assembly fixed and is evacuated in the vein of gas flow upstream of the vanes movable turbine.
- the radial and axial slots in which are housed the sealing tabs are usually machined so that they are joined, ie they communicate with each other. This arrangement is made necessary by the fact that the tabs must cover a maximum surface of the lateral faces segments for optimum sealing.
- FIG. 5 In this figure, two segments 100, 100 'are partially represented. of the fixed ring assembly each provided with an axial slot 102, 102 'and a radial slot 104, 104 '. Sealing tabs 106, 108 are housed respectively in the axial and radial slots.
- the game 110 existing between the tabs and the slots is due to the fact that, as segments are exposed to hot gases from the chamber of combustion, they undergo thermal expansions and contractions which reverberate at the level of the game 112 existing between the two segments adjacent.
- the present invention therefore aims to overcome such drawbacks by proposing a fixed-ring gas turbine ring assembly whose segments that constitute it have a particular geometry of the slots and sealing tabs to reduce leakage between two adjacent segments.
- a fixed ring assembly forming rotor casing of a gas turbine, fixed ring assembly having a plurality of segments including adjacent side faces are placed end to end with the interposition of sealing means, the sealing means comprising at least one sealing tongue axial and at least one radial sealing tongue housed respectively in at least one axial slot and at least one slot radially opposite the adjacent side faces of the segments, the radial slot opening at least at one of its ends in the axial slot, characterized in that the axial slot of the faces sides of each segment has a depth greater than that of the radial slot and in that the axial sealing tongue presents a width greater than that of the radial tongue.
- the axial sealing tongue housed in a slot more depth allows to cover the leakage sections observed in the art prior. In this way, it is possible to reduce air leakage between two adjacent segments which improves their cooling. AT identical cooling, it is also possible to reduce the flow of air required for cooling, and therefore to increase the efficiency of the turbine.
- Another advantage of the invention lies in the fact that this removal of these air leaks without additional parts (angled type) damaging the mass of the whole, does not require no significant changes to the slots and sealing tabs and does not involve maintenance issues.
- the fixed ring assembly may constitute a turbine ring high pressure of a turbomachine.
- each segment of ring may comprise, at its side faces, two slots axially disposed on the inner and outer wall side and in which axial tabs are housed, and two radial slots arranged side of upstream and downstream walls and in which are housed tabs radials.
- the fixed ring assembly may also constitute a spacer on which is fixed the high-pressure turbine ring of the turbine engine.
- each spacer segment may comprise, at its lateral faces, an axial slot in which is housed an axial tongue, and at least three radial slots, two of which are housed on the side of its upstream and downstream walls and in which are housed radial tongues.
- the present invention also aims at a segment for gas turbine fixed ring assembly as previously defined.
- a high-pressure turbine of turbomachine 2 of longitudinal axis X-X consists in particular of a a plurality of rotor blades 4 arranged in the vein ring 6 of hot gas flow from the chamber of combustion (not shown).
- a plurality of fixed blades 8 forming high pressure dispenser are also arranged in the vein 6, upstream of the blades 4 with respect to the direction flow of gases.
- the blades 4 are surrounded by a ring assembly fixed 12 forming envelope.
- This fixed ring set consists of a turbine ring attached to a casing 14 of the turbine via of a plurality of spacer segments 18. More particularly, the turbine ring is composed of a plurality of ring segments 16 gathered end to end. For example, there can be two segments ring 16 mounted on a single spacer segment 18.
- the fixed ring assembly 12 thus defined comprises a circuit of air circulation for cooling the ring segments 16 and of spacer 18 which are exposed to the hot gases from the chamber of combustion.
- the fixed ring assembly 12 is provided with a circuit cooling.
- a hole 20 is drilled in the upstream radial wall 22a of each spacer segment 18 and opens into a cavity 24 formed between the housing 14 and the spacer segment 18.
- the distributed air in this cavity 24 comes from a sample taken in the bottom of chamber and then feeds a cooling circuit of the segment spacer 18 and ring segment (s) 16 mounted thereon.
- the air is finally discharged into the flow line 6 of the hot gases, upstream of the blades 4 of the turbine.
- sealing barriers are interposed between two adjacent segments of ring 16 and spacer 18. These barriers consist of sealing tabs housed in axial slots and radially opposite each other in the adjacent lateral faces of the segments 16, 18.
- axial slots it is meant that these slots extend substantially axially, ie along the longitudinal axis X-X of the high-pressure turbine 2.
- radial slots it is understood that these slots extend substantially radially, that is to say according to a direction perpendicular to the longitudinal axis X-X.
- each ring segment 16 is provided with at least one axial slot 26 and at least one radial slot 28 made on its faces lateral 30.
- the lateral faces 30 of the ring segment each comprise two axial slots 26 and two radial slots 28.
- the axial slots 26 are for example arranged on the side of the inner walls 32a and outer 32b of the ring segment 16.
- the radial slots 28 they are for example positioned on the side of the upstream axial walls 34a and downstream 34b of segment 16.
- Such a distribution of the axial 26 and radial slots 28 allows thus to the sealing tabs to cover a large area of side faces 30 of the ring segment 16 to ensure a seal optimal between two adjacent ring segments.
- each spacer segment 18 is provided with at least an axial slot 36 and at least one radial slot 38 made on its side faces 40.
- each lateral face 40 of the segment spacer 18 comprises for example an axial slot 36 and three slots radial 38, two of which are arranged on the side of its upstream axial walls 22a and downstream 22b.
- the axial slot (s) 26, 36 of the lateral faces 30, 40 of each ring segment 16 and spacer 18 has a depth greater than that of the radial slot (s) 28, 38 and that the sealing tab housed in each axial slot presents a width greater than that of the sealing tongue housed in each radial slot.
- slot depth we mean the machining depth of the slot in the material of the segment concerned.
- tongue width we hear the distance of the tongue between its two edges side by which the tongue is positioned in the slots.
- FIG. 2 represents a spacer segment 18.
- the axial slot 36 has a depth P1 greater than the depth P2 of the slot radial 38 which opens into the axial slot 36.
- this characteristic also applies to the junction B 'of the spacer segment 18, as well as the junctions A and A' of the ring segment 16 ( Figure 1) .
- FIG. 3 two adjacent spacer segments 18, 18 ' end-to-end are represented, as well as the B-junction between slots axial 36 and radial 38.
- An axial sealing tab 42 is housed in the axial slot 36 and a radial sealing tongue 44 is housed in the radial slot 38.
- the axial sealing tongue 42 has a width L1 greater than the width L2 of the radial sealing tongue 44.
- this characteristic relating to the width sealing tabs also apply to the junction B 'of the spacer segment 18, as well as to the junctions A and A' of the ring segment 16 (FIG. 1).
- the fixed ring assembly as described constitutes an element a turbomachine high-pressure turbine.
- this invention applies to any other type of segmented ring of which it is necessary to ensure a seal between adjacent segments, as for example a high-pressure turbomachine distributor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Gasket Seals (AREA)
Abstract
Description
- la figure 1 est une vue en coupe longitudinale d'un ensemble à anneau fixe de turbine haute-pression de turbomachine selon l'invention ;
- la figure 2 représente en perspective un segment d'entretoise de l'ensemble à anneau fixe de la figure 1 ;
- la figure 3 illustre en perspective et partiellement en écorché deux segments d'entretoise de la figure 2 réunis bout à bout ;
- la figure 4 est une vue en coupe selon IV-IV de la figure 3 ; et
- la figure 5, décrite précédemment, illustre les problèmes de fuites rencontrés dans un ensemble à anneau fixe de l'art antérieur.
Claims (6)
- Ensemble à anneau fixe formant enveloppe de rotor d'une turbine à gaz, l'ensemble à anneau fixe comportant une pluralité de segments (16, 18) dont des faces latérales (30, 40) adjacentes sont mises bout à bout avec interposition de moyens d'étanchéité, les moyens d'étanchéité comportant au moins une languette axiale d'étanchéité (42) et au moins une languette radiale d'étanchéité (44) logées respectivement dans au moins une fente axiale (26, 36) et au moins une fente radiale (28, 38) pratiquées en vis-à-vis dans les faces latérales adjacentes des segments, la fente radiale (28, 38) débouchant au moins à l'une de ses extrémités dans la fente axiale (26, 36), caractérisé en ce que la fente axiale (26, 36) de chaque segment (16, 18) présente une profondeur (P1) supérieure à celle (P2) de la fente radiale (28, 38) et en ce que la languette axiale d'étanchéité (42) présente une largeur (L1) supérieure à celle (L2) de la languette radiale (44).
- Ensemble selon la revendication 1, caractérisé en ce qu'il constitue un anneau de turbine haute-pression d'une turbomachine.
- Ensemble selon la revendication 2, caractérisé en ce que chaque segment d'anneau (16) comporte, au niveau de ses faces latérales (30), deux fentes axiales (26) disposées du côté de parois interne (32a) et externe (32b) et dans lesquelles sont logées des languettes axiales, et deux fentes radiales (28) disposées du côté de parois amont (34a) et aval (34b) et dans lesquelles sont logées des languettes radiales.
- Ensemble selon la revendication 1, caractérisé en ce qu'il constitue une entretoise de turbine haute-pression d'une turbomachine.
- Ensemble selon la revendication 4, caractérisé en ce que chaque segment d'entretoise (18) comporte, au niveau de ses faces latérales (40), une fente axiale (36) dans laquelle est logée une languette axiale (42), et au moins trois fentes radiales (38) dont deux sont logées du côté de ses parois amont (22a) et aval (22b) et dans lesquelles sont logées des languettes radiales (44).
- Segment (16, 18) pour ensemble à anneau fixe (12) d'une turbine à gaz selon l'une quelconque des revendications 1 à 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0404737 | 2004-05-04 | ||
| FR0404737A FR2869943B1 (fr) | 2004-05-04 | 2004-05-04 | Ensemble a anneau fixe d'une turbine a gaz |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1593814A1 true EP1593814A1 (fr) | 2005-11-09 |
| EP1593814B1 EP1593814B1 (fr) | 2008-07-30 |
Family
ID=34942095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05290784A Expired - Lifetime EP1593814B1 (fr) | 2004-05-04 | 2005-04-08 | Arrangement des languettes d'étanchéité pour une virole d'une turbine à gaz |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7201559B2 (fr) |
| EP (1) | EP1593814B1 (fr) |
| JP (1) | JP4516473B2 (fr) |
| CA (1) | CA2504171C (fr) |
| DE (1) | DE602005008503D1 (fr) |
| ES (1) | ES2311201T3 (fr) |
| FR (1) | FR2869943B1 (fr) |
| RU (1) | RU2373401C2 (fr) |
| UA (1) | UA87971C2 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9416671B2 (en) | 2012-10-04 | 2016-08-16 | General Electric Company | Bimetallic turbine shroud and method of fabricating |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8240985B2 (en) * | 2008-04-29 | 2012-08-14 | Pratt & Whitney Canada Corp. | Shroud segment arrangement for gas turbine engines |
| US8740551B2 (en) * | 2009-08-18 | 2014-06-03 | Pratt & Whitney Canada Corp. | Blade outer air seal cooling |
| US8556575B2 (en) * | 2010-03-26 | 2013-10-15 | United Technologies Corporation | Blade outer seal for a gas turbine engine |
| US8753073B2 (en) * | 2010-06-23 | 2014-06-17 | General Electric Company | Turbine shroud sealing apparatus |
| US20120128472A1 (en) * | 2010-11-23 | 2012-05-24 | General Electric Company | Turbomachine nozzle segment having an integrated diaphragm |
| FR2968350B1 (fr) * | 2010-12-06 | 2016-01-29 | Snecma | Anneau sectorise de turbine pour turbomachine, et turbomachine equipee d'un tel anneau |
| US8444152B2 (en) * | 2011-05-04 | 2013-05-21 | General Electric Company | Spring seal assembly and method of sealing a gap |
| US20120292856A1 (en) * | 2011-05-16 | 2012-11-22 | United Technologies Corporation | Blade outer seal for a gas turbine engine having non-parallel segment confronting faces |
| GB201117084D0 (en) * | 2011-10-05 | 2011-11-16 | Rolls Royce Plc | Strip seals |
| US9810086B2 (en) * | 2011-11-06 | 2017-11-07 | General Electric Company | Asymmetric radial spline seal for a gas turbine engine |
| US9587746B2 (en) * | 2012-07-31 | 2017-03-07 | General Electric Company | Film riding seals for rotary machines |
| US10161259B2 (en) | 2014-10-28 | 2018-12-25 | General Electric Company | Flexible film-riding seal |
| FR3041993B1 (fr) * | 2015-10-05 | 2019-06-21 | Safran Aircraft Engines | Ensemble d'anneau de turbine avec maintien axial |
| US10822988B2 (en) * | 2015-12-21 | 2020-11-03 | Pratt & Whitney Canada Corp. | Method of sizing a cavity in a part |
| US10655495B2 (en) * | 2017-02-24 | 2020-05-19 | General Electric Company | Spline for a turbine engine |
| US10662794B2 (en) * | 2017-10-19 | 2020-05-26 | Rolls-Royce Corporation | Strip seal axial assembly groove |
| GB2571802A (en) * | 2018-03-06 | 2019-09-11 | Rolls Royce Plc | A Gas Turbine Engine Combustion Arrangement and a Gas Turbine Engine |
| RU190280U1 (ru) * | 2019-01-09 | 2019-06-25 | Публичное Акционерное Общество "Одк-Сатурн" | Устройство для фиксации сегментов сопловых лопаток в силовом корпусе статора турбины |
| US11111802B2 (en) * | 2019-05-01 | 2021-09-07 | Raytheon Technologies Corporation | Seal for a gas turbine engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147354A1 (fr) * | 1983-12-05 | 1985-07-03 | United Technologies Corporation | Joint intersecté et méthode de construction pour un tel joint |
| US5154577A (en) * | 1991-01-17 | 1992-10-13 | General Electric Company | Flexible three-piece seal assembly |
| EP0545589A1 (fr) * | 1991-11-27 | 1993-06-09 | General Electric Company | Anneau pour turbine basse pression |
| US5709530A (en) * | 1996-09-04 | 1998-01-20 | United Technologies Corporation | Gas turbine vane seal |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5738490A (en) * | 1996-05-20 | 1998-04-14 | Pratt & Whitney Canada, Inc. | Gas turbine engine shroud seals |
| US5868398A (en) * | 1997-05-20 | 1999-02-09 | United Technologies Corporation | Gas turbine stator vane seal |
| JP3462732B2 (ja) * | 1997-10-21 | 2003-11-05 | 三菱重工業株式会社 | ガスタービン静翼のダブルクロスシール装置 |
| US6273683B1 (en) * | 1999-02-05 | 2001-08-14 | Siemens Westinghouse Power Corporation | Turbine blade platform seal |
| US6561764B1 (en) * | 1999-03-19 | 2003-05-13 | Siemens Aktiengesellschaft | Gas turbine rotor with an internally cooled gas turbine blade and connecting configuration including an insert strip bridging adjacent blade platforms |
| US6814538B2 (en) * | 2003-01-22 | 2004-11-09 | General Electric Company | Turbine stage one shroud configuration and method for service enhancement |
| US7063503B2 (en) * | 2004-04-15 | 2006-06-20 | Pratt & Whitney Canada Corp. | Turbine shroud cooling system |
-
2004
- 2004-05-04 FR FR0404737A patent/FR2869943B1/fr not_active Expired - Fee Related
-
2005
- 2005-04-08 EP EP05290784A patent/EP1593814B1/fr not_active Expired - Lifetime
- 2005-04-08 DE DE602005008503T patent/DE602005008503D1/de not_active Expired - Lifetime
- 2005-04-08 ES ES05290784T patent/ES2311201T3/es not_active Expired - Lifetime
- 2005-04-21 US US11/110,885 patent/US7201559B2/en not_active Expired - Lifetime
- 2005-04-22 JP JP2005124581A patent/JP4516473B2/ja not_active Expired - Fee Related
- 2005-04-22 CA CA2504171A patent/CA2504171C/fr not_active Expired - Lifetime
- 2005-04-28 UA UAA200504095A patent/UA87971C2/ru unknown
- 2005-04-28 RU RU2005112913/06A patent/RU2373401C2/ru not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147354A1 (fr) * | 1983-12-05 | 1985-07-03 | United Technologies Corporation | Joint intersecté et méthode de construction pour un tel joint |
| US5154577A (en) * | 1991-01-17 | 1992-10-13 | General Electric Company | Flexible three-piece seal assembly |
| EP0545589A1 (fr) * | 1991-11-27 | 1993-06-09 | General Electric Company | Anneau pour turbine basse pression |
| US5709530A (en) * | 1996-09-04 | 1998-01-20 | United Technologies Corporation | Gas turbine vane seal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9416671B2 (en) | 2012-10-04 | 2016-08-16 | General Electric Company | Bimetallic turbine shroud and method of fabricating |
Also Published As
| Publication number | Publication date |
|---|---|
| UA87971C2 (ru) | 2009-09-10 |
| US7201559B2 (en) | 2007-04-10 |
| ES2311201T3 (es) | 2009-02-01 |
| US20050248100A1 (en) | 2005-11-10 |
| CA2504171C (fr) | 2012-10-23 |
| CA2504171A1 (fr) | 2005-11-04 |
| JP4516473B2 (ja) | 2010-08-04 |
| FR2869943A1 (fr) | 2005-11-11 |
| JP2005320965A (ja) | 2005-11-17 |
| FR2869943B1 (fr) | 2006-07-28 |
| RU2005112913A (ru) | 2006-11-20 |
| DE602005008503D1 (de) | 2008-09-11 |
| RU2373401C2 (ru) | 2009-11-20 |
| EP1593814B1 (fr) | 2008-07-30 |
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