EP3746642A1 - Carter inter-turbines comprenant des aubes séparatrices rapportées - Google Patents
Carter inter-turbines comprenant des aubes séparatrices rapportéesInfo
- Publication number
- EP3746642A1 EP3746642A1 EP19710020.9A EP19710020A EP3746642A1 EP 3746642 A1 EP3746642 A1 EP 3746642A1 EP 19710020 A EP19710020 A EP 19710020A EP 3746642 A1 EP3746642 A1 EP 3746642A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inter
- turbine casing
- shell
- ferrule
- arms
- 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
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
- F01D25/243—Flange connections; Bolting arrangements
-
- 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
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
-
- 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
-
- 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
- F01D25/246—Fastening of diaphragms or stator-rings
-
- 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
- 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
- F05D2220/32—Application in turbines in gas 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
-
- 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
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
Definitions
- Inter-turbine casing including separating vanes
- the invention generally relates to a turbomachine, in particular a double-flow turbine, and more particularly to an inter-turbine casing of the vane frame turbine type (for turbine blade structure) that fulfills the function of turbine distributor in such a turbomachine.
- a turbomachine with a double flow generally comprises, upstream to downstream in the direction of the gas flow, a fan, a primary flow annular vein and an annular secondary flow vein.
- the air mass sucked by the fan is thus divided into a primary flow, which circulates in the primary flow vein, and a secondary flow, which is concentric with the primary flow and circulates in the secondary flow vein.
- the primary flow stream passes through a primary body comprising one or more stages of compressors, for example a low pressure compressor and a high pressure compressor, a combustion chamber, one or more turbine stages, for example a high pressure turbine and a low pressure turbine, and a gas exhaust nozzle.
- a primary body comprising one or more stages of compressors, for example a low pressure compressor and a high pressure compressor, a combustion chamber, one or more turbine stages, for example a high pressure turbine and a low pressure turbine, and a gas exhaust nozzle.
- the turbomachine further comprises an inter-turbine casing whose hub is arranged between the high pressure turbine casing and the low pressure turbine casing.
- the inter-turbine hub comprises a fairing (or fairing in English) comprising an inner ferrule and an outer ferrule, which together define the flow path between the high-pressure turbine and the low-pressure turbine, as well as arms which extend radially between the inner ferrule and the outer ferrule.
- the fairing can have a single profile configuration and have only arms.
- the fairing may have a multi profiles configuration and include, in addition to arms, splitter blades (or splitters in English).
- one or more separating vanes are interposed between the arms and present a small rope in comparison with the arms, which are thicker and have a long rope.
- rope here will be understood the segment connecting the leading edge and the trailing edge of the separating arm or blade at its junction with the outer shell.
- the single profile configuration is more conventional and easier to manufacture.
- the integration of the arms can be difficult insofar as the need for deflection of the gas flow by the arms can lead to highly curved aerodynamic profiles.
- the multi-profile configuration the deviation of the gas flow is carried out via the downstream part of the arms and the separating vanes, which makes it possible to maintain an almost symmetrical profile in the upstream part of the arms.
- the multi-profile configuration has a significant aerodynamic optimization potential since it comprises a large number of parameters that can be adjusted as needed.
- a fairing having a multi-profile configuration is more difficult to achieve. Generally, it is obtained either by casting or by connecting the separator vanes.
- EP 2 860 354, EP 2 835 503 and GB 1 058 759 disclose an inter-turbine casing for a turbomachine comprising an inner shell, an outer shell, an assembly of arms and a set of separating vanes attached to the inner shell and the outer shell downstream of the arms.
- An object of the invention is to provide an inter-turbine casing for a multi-profile type of turbine engine that is easy to perform at a moderate cost and whose maintenance is facilitated in comparison with conventional inter-turbine casings.
- the invention proposes an inter-turbine casing for a turbomachine comprising:
- the separator vanes each comprising a foot provided with an internal platform fixed to the inner shell and a head provided with an external platform fixed to the outer shell.
- the inner ferrule comprises at least one internal groove configured to slidably receive one or more internal platforms.
- the outer shell comprises at least one outer groove configured to slidably receive one or more external platforms.
- the inter-turbine casing further comprises means for locking the separator vanes in the internal and external grooves.
- inter-turbine casing Some preferred but non-limiting features of the inter-turbine casing described above are the following, taken individually or in combination:
- each inner platform and each external platform comprising a stud protruding from said platforms configured to penetrate into the rib of the internal groove or corresponding external groove in order to lock radially the separating vanes in said inner and outer grooves.
- each inner platform and each external platform has an upstream face and a downstream face and comprises two tenons, a first of the tenons extending from the one upstream face while the second of the tenons extends from the downstream face, and wherein each internal groove and each external groove has an upstream rim and a downstream rim, a rib being formed in each upstream edge and in each downstream edge and being configured to receive an associated tenon.
- the locking means comprise: a set of orifices formed in the inner shell and the inner platforms and a set of anti-rotation pins, each anti-rotation pin being inserted firstly into an orifice of the inner ring and into an orifice of an internal platform, and a set of orifices formed in the outer shell and the outer platforms and a set of anti-rotation pins, each anti-rotation pin being inserted on the one hand into an orifice of the outer shell and in an orifice of an external platform.
- the arms are formed integrally and in one piece with the inner ferrule and the outer ferrule.
- the arms extend over a greater length than the separating vanes.
- each arm and each splitter blade has a rope, the rope of the arms being larger than the rope of the separating vanes.
- the inter-turbine casing is sectorized so that the inner ring and the outer ring each comprise a plurality of ring sectors.
- each ring sector of the inner ferrule and the outer ferrule comprises axial edges, each axial edge being configured to be fixed facing an associated axial edge of another ring sector of the inner ferrule or of the outer shell, and wherein the inner grooves and outer grooves of each ring sector of the inner shell and the outer shell open on an axial edge of said ring sector.
- the inter-turbine casing comprises a single arm formed integrally and in one piece with one of the inner ring ring sectors and one of the outer ring ring sectors and at least two separating vanes, preferably three separating vanes.
- Figure 1 is a perspective view from downstream of an exemplary inter-turbine casing sector according to the invention comprising an arm and three separating vanes.
- Figure 2 is a perspective view from downstream illustrating the mounting of two separating vanes sector of the inter-turbine casing of Figure 1.
- Figure 3a is a bottom view of the inter-turbine casing sector of Figure 1 without the separating vanes.
- Figure 3b is a top view of the inter-turbine casing sector of Figure 1 without the separating vanes.
- Figure 4 is a perspective view of an embodiment of separator blade that can be used in an inter-turbine casing according to the invention.
- Figure 5 is a sectional view of an embodiment of an inter-turbine casing at a separating blade.
- An inter-turbine casing 1 according to the invention comprises:
- the inner shell 10 and the outer shell 20 extend coaxially about a longitudinal axis X.
- a set of separating vanes 30 comprising a foot 31 fixed to the inner ferrule 10 and a head 32 fixed to the outer ferrule 20.
- the separating vanes 30 are positioned circumferentially between the arms 2. In particular, one or more separating vanes 30 may extend between two adjacent arms 2. Note that, conventionally, the rope of each splitter blade 30 is shorter than the rope of each arm 2.
- Each separator blade 30 furthermore comprises an internal platform 33 fixed on its foot 31 and an external platform 36 fixed on its head 32.
- the inner ferrule 10 comprises at least one inner groove 11 configured to slidably receive one or more inner platforms 33 and the outer ferrule 20 comprises at least one outer groove 21 configured to slidably receive one or more external platforms 36.
- inter-turbine casing 1 comprises locking means 4, 5 of the separating vanes 30 in the grooves.
- upstream and downstream are defined with respect to the direction of gas flow in the inter-turbine casing.
- the separator vanes 30 are thus attached and fixed to the rest of the inter-turbine casing 1 via their inner platform 33 and their external platform 36, which makes it possible to simplify the manufacture of the inter-turbine casing 1 as well as the maintenance operations.
- the radially outer face 33a of the inner platforms 33 and the radially inner face 36a of the outer platforms 36 extend in the extension of the inner ferrule 10 and outer ferrule 20 of to restore the flow vein.
- the inner and outer platforms 33, 36 further completely fill the internal grooves (s) and external (s) so as not to leave a cavity that can create pressure drops.
- the inner ferrule 10 and the outer ferrule 20 may each be formed of several ring sectors, each sector of ring ring carrying one or more arms 2.
- the ring sectors then each comprise two axial edges 3 and are fixed together in pairs at their axial edges 3 in order to form the inner shell 10 and the outer shell 20.
- the internal and external grooves 11, 21 each open at one of the axial edges 3 of the ring sectors forming the inner and outer rings 10, 20 to allow the insertion of the inner and outer platforms 33, 36 into the grooves internal and external 11, 21 associated.
- each ring sector has only one arm 2.
- Each ring sector may, however, comprise two internal grooves 11 (respectively, two outer grooves 21) extending on either side of the arm 2 associated (see for example Figure 3b).
- Each groove then opens into the associated axial edge 3.
- a same groove may however receive several separating vanes 30.
- FIGS. 1 and 2 illustrate an example of an inter-turbine casing sector comprising an arm surrounded on one side by a separating blade 30 and on the other side by two separating vanes 30.
- At least one rib 12, 22 is formed in each inner groove 11 and each outer groove 21 while each inner platform 33 and each outer platform 36 comprises an associated pin 39.
- each internal groove 11 (respectively, each external groove 21) is delimited by an inner wall 13 (respectively an outer wall 23) and a peripheral edge having an upstream edge 14, 24 and a downstream edge 15, 25.
- a rib 12, 22 is formed both in the upstream edge 14, 24 and in the downstream edge 15, 25 of the internal groove 11 (respectively of the external groove 21) by opening at one of the axial edges 3 of the internal groove 11 (respectively, of the outer groove 21).
- the inner platform 33 (respectively, the outer platform 36) of the separator vanes 30 has an upstream face 34, 37 configured to face the upstream rim 14 of the internal groove 11 (respectively of the external groove 21). and a downstream face 35, 38 configured to face its downstream border 15. It further comprises a pin 39 protruding from the upstream face 34 of the inner platform (respectively, the upstream face 37 of the outer platform 36) and configured to slide in the rib 12, 22 of the upstream edge 14, 24, and a pin 39 protruding from the downstream face 35 of the inner platform 33 (respectively, the downstream face 38 of the outer platform 36) and configured to slide in the rib 12, 22 of the downstream edge 15, 25.
- the tenons 39 and the associated ribs 12, 22 thus make it possible to guide the separator vanes 30 in the internal and external grooves 11, 21 and to prevent their radial deflection .
- the radial section of the inner and outer grooves 11, 21 is constant between the axial edges 3 of the ring sectors forming said rings 10 , 20.
- the locking means 4, 5 are configured to lock the separating vanes 30 in position once they are in place in the inner and outer grooves 11, 21.
- the blocking means may comprise:
- each pawn anti-rotation being inserted firstly into an orifice 4 of the inner shell 10 and into an orifice 4 of an internal platform 33, and
- each anti-rotation pin 5 being inserted firstly in an orifice 4 of the outer shell 20 and in a port 4 of an external platform 36.
- an orifice 4 is formed in the inner shell 10 and in the outer shell 20 for each separating blade 30.
- the inter-turbine casing 1 thus comprises as many anti-rotation pins 5 as separating vanes 30.
- the orifices 5 are circular and have an axis of symmetry which is normal to the inner shell 10 (respectively to the outer shell 20).
- the arms 2 in turn are formed integrally with the inner ferrule 10 and the outer ferrule 20 (or at least with the ring sector of the inner ferrule 10 and the outer ferrule 20 to which they are attached).
- the arms 2 can be cast from the inner ferrule 10 and the outer ferrule 20.
- the arms 2 can be attached and fixed on the inner ferrule 10 and the outer ferrule 20.
- the radially inner face of the inner platform 33 and the radially outer face of the outer platform 36 may be locally recessed in order to reduce the overall mass of the inter-turbine casing 1, except in the zone in which is formed the orifice (see Figure 4).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1850672A FR3077329B1 (fr) | 2018-01-29 | 2018-01-29 | Carter inter-turbines comprenant des aubes separatrices rapportees |
| PCT/FR2019/050164 WO2019145648A1 (fr) | 2018-01-29 | 2019-01-25 | Carter inter-turbines comprenant des aubes séparatrices rapportées |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3746642A1 true EP3746642A1 (fr) | 2020-12-09 |
| EP3746642B1 EP3746642B1 (fr) | 2022-03-02 |
Family
ID=61599488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19710020.9A Active EP3746642B1 (fr) | 2018-01-29 | 2019-01-25 | Carter inter-turbines comprenant des aubes séparatrices rapportées |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11143044B2 (fr) |
| EP (1) | EP3746642B1 (fr) |
| CN (1) | CN111655974B (fr) |
| FR (1) | FR3077329B1 (fr) |
| WO (1) | WO2019145648A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3145187B1 (fr) | 2023-01-24 | 2026-04-17 | Safran Aircraft Engines | Carter de turbomachine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1058759A (en) * | 1963-12-24 | 1967-02-15 | Ass Elect Ind | Improvements in or relating to the bladed diaphragms of turbines |
| FR2935430B1 (fr) * | 2008-08-26 | 2012-03-09 | Snecma | Turbine haute-pression de turbomachine amelioree, secteur de distributeur et moteur d'aeronef associes |
| ES2370307B1 (es) * | 2008-11-04 | 2012-11-27 | Industria De Turbo Propulsores, S.A. | Estructura soporte de rodamiento para turbina. |
| CN104204453B (zh) * | 2012-04-23 | 2019-03-08 | 博格华纳公司 | 带横向凹槽的涡轮增压器护罩以及结合有该护罩的涡轮增压器 |
| US9835038B2 (en) * | 2013-08-07 | 2017-12-05 | Pratt & Whitney Canada Corp. | Integrated strut and vane arrangements |
| US9556746B2 (en) * | 2013-10-08 | 2017-01-31 | Pratt & Whitney Canada Corp. | Integrated strut and turbine vane nozzle arrangement |
| BE1022361B1 (fr) * | 2014-11-06 | 2016-03-17 | Techspace Aero Sa | Stator mixte de compresseur de turbomachine axiale. |
| US9810238B2 (en) * | 2015-03-09 | 2017-11-07 | Caterpillar Inc. | Turbocharger with turbine shroud |
-
2018
- 2018-01-29 FR FR1850672A patent/FR3077329B1/fr active Active
-
2019
- 2019-01-25 WO PCT/FR2019/050164 patent/WO2019145648A1/fr not_active Ceased
- 2019-01-25 US US16/965,433 patent/US11143044B2/en active Active
- 2019-01-25 CN CN201980010761.6A patent/CN111655974B/zh active Active
- 2019-01-25 EP EP19710020.9A patent/EP3746642B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US11143044B2 (en) | 2021-10-12 |
| US20210054752A1 (en) | 2021-02-25 |
| CN111655974B (zh) | 2022-05-13 |
| CA3089160A1 (fr) | 2019-08-01 |
| FR3077329B1 (fr) | 2022-06-24 |
| WO2019145648A1 (fr) | 2019-08-01 |
| CN111655974A (zh) | 2020-09-11 |
| EP3746642B1 (fr) | 2022-03-02 |
| FR3077329A1 (fr) | 2019-08-02 |
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