EP3857028A1 - Distributeur ameliore de turbomachine - Google Patents
Distributeur ameliore de turbomachineInfo
- Publication number
- EP3857028A1 EP3857028A1 EP19787014.0A EP19787014A EP3857028A1 EP 3857028 A1 EP3857028 A1 EP 3857028A1 EP 19787014 A EP19787014 A EP 19787014A EP 3857028 A1 EP3857028 A1 EP 3857028A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distributor
- platform
- strip
- main portion
- strips
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 241000446313 Lamella Species 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 description 13
- 239000007789 gas Substances 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
-
- 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
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
-
- 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
-
- 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
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/023—Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings
-
- 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
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
- F05D2240/128—Nozzles
-
- 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 present invention relates to the field of aeronautical turbomachines, and more precisely a distributor for a turbomachine turbine, and a turbomachine comprising such a distributor.
- This air is injected into the cavity (ies) of the blades through one and the other of the ends thereof, to cool them from the inside.
- the air then escapes into the vein through holes made in the blades and communicating with the cavity (ies) of the blade and with the vein, the cooling air creating a protective film of cooler air s 'flowing along the blade.
- the present disclosure relates to a turbine distributor for a turbomachine extending radially around an axis, the distributor comprising a plurality of sectors each comprising at least one blade which extends radially between an inner platform and an outer platform , the distributor comprising at least two sealing strips each comprising a main portion configured to seal between the distributor and an element of the turbomachine adjacent to the distributor, and a first portion folded relative to the main portion, the first portion folded being in contact with an outer face of at least one platform, each strip being held on the at least one platform by a clamping means configured to clamp the first folded portion between the outer face of the platform and the clamping means.
- the term “radial” and its derivatives denote a radial direction of the turbine, that is to say a direction perpendicular to the axis of the turbine.
- the terms “upstream” and “downstream” are considered along the axis of the turbine, and according to the direction of flow of the gases in the turbine, between the two platforms, that is to say in the vein gas circulation.
- the blades are arranged between two platforms: a radially outer platform, and a radially inner platform, the inner and outer platforms being annular or in the form of a ring sector and coaxial.
- the “external face” of the platforms designates the face of the platforms opposite the vein gas flow, the latter being delimited by the internal face of the platforms. In other words, the gas flow stream is delimited by the internal face of the external platform, and the internal face of the internal platform.
- the sealing strips can have the form of a metal plate, for example made of an alloy based on nickel and / or cobalt, and having a thickness of less than 1 mm.
- the plate forming a sealing strip is folded, so as to form a first folded portion, and a main portion having a larger area than the folded portion.
- the main portion of the strips is the portion of the strip having the largest surface, and extends on the one hand in a direction substantially parallel to the radial direction, or slightly inclined relative to the radial direction, and d on the other hand in a circumferential direction, following the shape of the distributor, so that the main portion has the shape of an arc of a circle.
- the fixing of the sealing strips to the distributor is ensured by the first folded parts and the fixing means, and the sealing between the distributor and the elements of the turbomachine adjacent to the distributor is provided by the main portion.
- the use of pins and / or rivets usually making it possible to fix the strips on the distributor, for example on the shoulder of the sector disposed at an upstream and / or downstream end of the platform, is therefore no longer necessary.
- the risk of loss of the lamellae due to shearing of the rivets is therefore reduced. Consequently, the risk of deterioration of the blades, due to obstruction of the cooling cavities by the lamellae, is also reduced.
- the dispenser comprises two strips each forming a half-ring, the clamping means being arranged around the dispenser so as to clamp the two strips against the outer faces of the platforms of the dispenser.
- the main portion and the first folded portion of each strip form between them an angle between 90 ° and 150 °.
- this angle between the main portion and the first folded portion of each strip is the natural angle formed by these two portions of the strip, that is to say when no effort tending to deform the strip , and therefore to modify this angle, is only exerted on the strip.
- the plate forming the strip is not folded so as to form a right angle between the portion main and the folded portion, but so as to form an obtuse angle between the latter.
- the plane in which the main portion of the strip extends is not parallel with respect to the radial direction, but slightly inclined with respect to the latter. This configuration improves the seal between the distributor and the element of the turbomachine adjacent to the distributor.
- the circumferential end of the main portion of a strip and the circumferential end of the main portion of the adjacent strip overlap over a distance between 1 and 10 mm.
- each strip is provided so that the circumferential ends thereof overlap each other, over their entire height.
- height their length in the radial direction.
- the circumference of one of the two strips is substantially larger than the other, so as to overlap the ends of the latter.
- the clamping means is a rod.
- ring means a ring, preferably metallic, having two free ends opposite but disjoint from each other.
- the dispenser comprises at least one blade fixed to the radial wall, and configured to exert pressure on a strip.
- FIG. 2 shows a partial perspective view of a turbine distributor for a turbomachine according to the prior art, when an orifice is closed;
- FIG. 3 shows a partial perspective view of a turbine distributor for a turbomachine according to the present description
- FIG. 4 shows a perspective view of the junction between two strips according to the present description
- These cavities communicate with the vein 20 by rows of holes 30 extending axially and / or radially between the inner platform 18 and the outer platform 16 along the blades 13 to open into the vein 20.
- a gas flowing from the exterior of the vein 20 can thus penetrate into the cavity 26, flow into the blade 13, then be evacuated into the vein 20 via the orifices 30, thus allowing the blade cooling 13.
- the distributor sector 10 also includes sealing strips 12 fixed to the platforms 16, 18, and making it possible to ensure sealing between the distributor and an element of the turbomachine 1 axially adjacent to the distributor. More specifically, the sealing strips 12 are fixed on shoulders 161, 162 of the platform 16, by means of pins and / or rivets 14.
- This contact generates a force on the radial end of the main portion 120, tending to reduce the angle between the main portion 120 and the folded portion 121.
- the main portion 120 tending to return to its initial position by elasticity, thus acts as a spring by exerting pressure on the element of the turbomachine 1 axially adjacent to the distributor.
- the value of the angle a is determined so that, when the distributor is assembled to the turbomachine, and during normal operation of the latter, contact always exists between the main portion 120 of the strip 12 and the element of the turbomachine 1 axially adjacent to the distributor.
- Blades, or pins 170, used to exert pressure on joint covers in order to maintain the latter at the junctions between two circumferentially adjacent strips 12 can be used in order to exert pressure against the main portions 120 of the strips 12 via a contact portion 171, and thus accentuate the contact pressure between the main portions 120 and the element of the turbomachine 1, thus further improving the sealing.
- These pins are fixed to a radial wall 163 by means of a rivet 164. It is noted that the rivets 164 serving to fix these pins 170 to the dispenser, are not in contact with the strips 12, which limits damage by shearing of the strips 12.
- the overlapping portion can also be formed by stamping a circumferential end of a strip 12, thus creating a recess on one face of the main portion 120, at the circumferential end of this strip 12, the circumferential end of the adjacent strip then coming to lodge in this disbursement (cf. Figure 4).
- the length along the circumference (in other words the length of the arc of a circle) of the first folded portion 121 and the second folded portion 122 is substantially less than the length according to the circumference of the portion main 120.
- the circumferential ends of the main portions 120 overlap.
- the circumferential ends of the first folded portion 121 and of the second folded portion 122 of two circumferentially adjacent strips 12 are separated from each other. This configuration makes it easier to assemble the strips 12 around the distributor, and in particular the junction of two adjacent strips 12.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1858804A FR3086329B1 (fr) | 2018-09-26 | 2018-09-26 | Distributeur ameliore de turbomachine |
PCT/FR2019/052057 WO2020065161A1 (fr) | 2018-09-26 | 2019-09-06 | Distributeur ameliore de turbomachine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3857028A1 true EP3857028A1 (fr) | 2021-08-04 |
EP3857028B1 EP3857028B1 (fr) | 2022-08-03 |
Family
ID=65243888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19787014.0A Active EP3857028B1 (fr) | 2018-09-26 | 2019-09-06 | Distributeur amelioré de turbomachine |
Country Status (5)
Country | Link |
---|---|
US (1) | US11408292B2 (fr) |
EP (1) | EP3857028B1 (fr) |
CN (1) | CN112771247B (fr) |
FR (1) | FR3086329B1 (fr) |
WO (1) | WO2020065161A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3112813B1 (fr) * | 2020-07-24 | 2022-08-19 | Safran Aircraft Engines | Assemblage anti-cisaillement d’une lamelle et d’un pion |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4314793A (en) * | 1978-12-20 | 1982-02-09 | United Technologies Corporation | Temperature actuated turbine seal |
US5797723A (en) * | 1996-11-13 | 1998-08-25 | General Electric Company | Turbine flowpath seal |
FR2786222B1 (fr) * | 1998-11-19 | 2000-12-29 | Snecma | Dispositif d'etancheite a lamelle |
FR2829796B1 (fr) * | 2001-09-20 | 2003-12-12 | Snecma Moteurs | Dispositif de maintien des joints de plates-formes de secteurs de distributeur de turbomachine a lamelles d'etancheite |
FR2860264B1 (fr) * | 2003-09-30 | 2006-02-10 | Snecma Moteurs | Turbomachine comprenant deux elements mis en communication avec interposition d'un joint |
US7246995B2 (en) * | 2004-12-10 | 2007-07-24 | Siemens Power Generation, Inc. | Seal usable between a transition and a turbine vane assembly in a turbine engine |
FR2955145B1 (fr) | 2010-01-14 | 2012-02-03 | Snecma | Distributeur de turbine haute pression d'un turboreacteur |
US8985592B2 (en) * | 2011-02-07 | 2015-03-24 | Siemens Aktiengesellschaft | System for sealing a gap between a transition and a turbine |
JP6392342B2 (ja) * | 2013-07-19 | 2018-09-19 | ゼネラル・エレクトリック・カンパニイ | インピンジメントバッフルを有するタービンノズル |
US10077669B2 (en) * | 2014-11-26 | 2018-09-18 | United Technologies Corporation | Non-metallic engine case inlet compression seal for a gas turbine engine |
EP3091188B1 (fr) * | 2015-05-08 | 2018-08-01 | MTU Aero Engines GmbH | Turbomachine dotée d'un dispositif d'étanchéité |
-
2018
- 2018-09-26 FR FR1858804A patent/FR3086329B1/fr not_active Expired - Fee Related
-
2019
- 2019-09-06 WO PCT/FR2019/052057 patent/WO2020065161A1/fr unknown
- 2019-09-06 EP EP19787014.0A patent/EP3857028B1/fr active Active
- 2019-09-06 CN CN201980062952.7A patent/CN112771247B/zh active Active
- 2019-09-06 US US17/278,903 patent/US11408292B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN112771247B (zh) | 2023-09-15 |
FR3086329B1 (fr) | 2020-12-11 |
US11408292B2 (en) | 2022-08-09 |
US20220042419A1 (en) | 2022-02-10 |
FR3086329A1 (fr) | 2020-03-27 |
WO2020065161A1 (fr) | 2020-04-02 |
CN112771247A (zh) | 2021-05-07 |
EP3857028B1 (fr) | 2022-08-03 |
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