EP4256186A1 - Ensemble propulsif pour un aeronef et son procede de montage - Google Patents
Ensemble propulsif pour un aeronef et son procede de montageInfo
- Publication number
- EP4256186A1 EP4256186A1 EP21836593.0A EP21836593A EP4256186A1 EP 4256186 A1 EP4256186 A1 EP 4256186A1 EP 21836593 A EP21836593 A EP 21836593A EP 4256186 A1 EP4256186 A1 EP 4256186A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seal
- edge
- space
- axial
- gas generator
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/40—Arrangements for mounting power plants in aircraft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/10—Aircraft characterised by the type or position of power plants of gas-turbine type
- B64D27/14—Aircraft characterised by the type or position of power plants of gas-turbine type within, or attached to, fuselages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings or cowlings
- B64D29/04—Power-plant nacelles, fairings or cowlings associated with fuselages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings or cowlings
- B64D29/06—Attaching of nacelles, fairings or cowlings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings or cowlings
- B64D29/08—Inspection panels for power plants
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/20—Mounting or supporting of plant; Accommodating heat expansion or creep
-
- 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
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
-
- 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
-
- 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
- F05D2230/70—Disassembly methods
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- TITLE PROPULSION ASSEMBLY FOR AN AIRCRAFT AND ITS ASSEMBLY METHOD
- the present invention relates to a propulsion assembly for an aircraft, as well as a method of mounting this propulsion assembly.
- the technical background includes in particular documents US-A1 -2016/146030, US-A1 -2007/222163, US-A1 -2020/378308 and US-A-3,591,963.
- a propulsion assembly for an aircraft conventionally comprises a gas generator and an air inlet.
- a gas generator comprises, from upstream to downstream, with reference to the gas flow, at least one compressor, one annular combustion chamber and at least one turbine.
- the gas generator is for example a turbomachine or a turbojet.
- the air inlet is located upstream of the gas generator and ensures the channeling of the air flow entering the gas generator.
- the air inlet is formed by a nacelle surrounding the fan located upstream of the gas generator.
- a propulsion assembly can be installed in a lateral position or in a central position on an aircraft.
- Figures 1 and 2 illustrate lateral positions of a propulsion unit 10 located respectively under a wing 12 and at the rear of the fuselage 14 of the aircraft.
- FIG. 3 illustrates a central position of a propulsion unit 10 located at the rear in the fuselage 14 of the aircraft.
- the propulsion assembly 10 In the lateral position, the propulsion assembly 10 generally forms a one-piece assembly suspended from the wing 12 or from the fuselage 14.
- the air inlet 16 is therefore generally fixed to the gas generator 18 via a bolted assembly.
- the air inlet 16 and the gas generator 18 are generally independent and fixed independently of each other to the structure of the aircraft.
- a sealing system 20 is then inserted axially between the air inlet 16 and the gas generator 18 to ensure sealing between these elements while allowing relative movements between them in operation, or even to confer fire protection on the zone.
- the air inlet 16 and the gas generator 18 being independent in the latter case, they are installed one after the other on the aircraft.
- a first of the elements, such as the air intake 16, is fixed to the aircraft then the other element, therefore the gas generator 18, is mounted in turn.
- This other element can be mounted in two ways.
- the gas generator 18 is positioned coaxially with the air inlet 16 then is moved in axial translation towards the air inlet to its final position in which the sealing system is constrained axially between the air inlet and the gas generator.
- the gas generator 18 is positioned parallel and laterally to the air inlet 16 so that the downstream edge 16a of the air inlet 16 and the upstream edge 18a of the gas generator 18 are located in the same plane perpendicular to the longitudinal axis A of the gas generator 18.
- the gas generator 18 is then moved in a direction transverse to this axis A (arrow F1) until that the air inlet 16 and the gas generator 18 are aligned axially.
- the gas generator 18 is then fixed in turn to the structure of the aircraft. This method of attachment is necessary, for example, when the means of attachment of the gas generator 18 to the structure of the aircraft include shear pins 22 illustrated schematically in Figures 5 and 6.
- the present invention proposes a solution to at least some of the problems mentioned above.
- the invention relates to a propulsion assembly for an aircraft, this propulsion assembly comprising:
- a gas generator having a longitudinal axis and comprising at least one compressor, one combustion chamber and at least one turbine arranged one behind the other along said axis,
- sealing system interposed axially between the air inlet and the gas generator, the sealing system being configured to provide sealing between a downstream edge of the air inlet and an edge upstream of the gas generator, these edges being configured to be separate from each other, characterized in that the sealing system comprises at least:
- a compression ring which comprises a first axial end for mechanical connection to the aforementioned edge of a first of the elements chosen from among the gas generator and the air inlet, and a second opposite axial end intended to be separated axially from the edge of a second of the elements by an annular space, this space having an axial dimension which can be reduced by bringing the compression ring closer to the second element, and
- annular seal mounted in said space and configured to be compressed axially by reducing the axial dimension of said space.
- the sealing system thus comprises a compression ring which is configured to be secured by a mechanical connection to one of the elements, chosen from among the air inlet and the gas generator, and to be separate from the other of these elements.
- the compression ring is separated from this other element by a space for housing an annular gasket which is axially compressible and provides sealing between the elements, and even also confers fire protection in this area.
- the gasket is compressible from an initial position to an axially compressed position, the passage from the initial position to the compressed position being caused by the reduction of the axial dimension of the housing space of the gasket and therefore by the bringing the compression ring closer to the element not mechanically linked to this ring.
- the seal is preferably also constrained axially to ensure optimum sealing between the elements.
- the displacement of the compression ring is achieved when this ring is dissociated from the element to which it must be mechanically connected. After separating the compression ring from this element, the compression ring is moved and the seal is compressed. The compression ring is then moved away from the element to which it was linked, which makes it possible to remove this element by translation in the transverse direction without risk of degradation of the seal or of the sealing system.
- the assembly of the propulsion assembly can be carried out in a similar manner in the reverse order of the aforementioned steps.
- the invention thus facilitates the assembly and disassembly of a propulsion assembly by allowing the movement in the transverse direction of one of the elements of the assembly relative to the other of these elements, while guaranteeing the integrity of the system of sealing intended to be interposed between these elements.
- the propulsion assembly according to the invention may comprise one or more of the following characteristics, taken separately from each other or in combination with each other:
- the gasket is configured to be compressed over a predetermined axial dimension, preferably at least equal to 5mm, and/or at a predetermined compression rate, preferably at least 25%;
- the seal comprises: o at least one annular part comprising an annular cavity, this cavity having in axial section a shape intended to be modified during compression of the seal, and/or o at least one annular part comprising a cylindrical heel configured to be engaged in the compression ring or one of the edges, and/or at least one annular sealing lip;
- the seal comprises an annular body made of elastomeric or composite material as well as an annular sheet extending to the internal periphery of the body;
- the first end of the compression ring comprises an annular flange for attachment to a complementary annular flange of the corresponding edge;
- the second end of the compression ring comprises projecting clevises which are located opposite similar clevises of the corresponding edge and which are configured to allow the application of a force to reduce the axial dimension of said space;
- the yokes comprise axially aligned screw passage holes, the screws being configured to be screwed in to reduce the axial dimension of said space and to be removed during normal operation of the propulsion assembly;
- the compression ring comprises at least: o an annular acoustic attenuation wall or coating, and/or o longitudinal stiffeners extending along the said axis;
- the present invention also relates to a method for mounting a propulsion assembly as described above, in which it comprises the steps consisting in: a) positioning the sealing system coaxially with the second element, the second end of the ring facing the edge of this element and the gasket being mounted in said space, b) bringing the second end of the compression ring closer to the edge of the second element so as to reduce the axial dimension of the space of housing of the joint and thus to exert an axial compression force of the joint, c) to move the first element in a transverse direction with respect to a longitudinal axis of the second element, until the first and second elements are aligned axially and that the first end of the ring is separated by a predetermined axial distance from the edge of the first element, d) relieving the axial compression force of the seal so that a springback of the seal causes the removal ession of the aforementioned axial distance, and e) fixing the first end of the compression ring to the edge of the first element.
- the joint remains constrained axially in said space at the end of step d) and during step e).
- step b) is carried out using clamps bearing axially on said yokes, or by using screws passing through holes in said yokes.
- the present invention also relates to a method for dismantling a propulsion unit, in which it comprises the steps consisting in: f) separating the first end of the compression ring from the edge of the first element, g) bringing the second end of the compression ring closer to the edge of the second element so as to reduce the axial dimension of the housing space of the gasket and thus to exert an axial compression force of the gasket, h) moving the first element in a transverse direction with respect to a longitudinal axis of the second element, until the first and second members are misaligned, i) remove the axial compressive force from the joint
- Figure 1 is a very schematic view of a propulsion unit fixed in the lateral position to a wing of an aircraft;
- Figure 2 is a very schematic view of two propulsion units fixed in a lateral position at the rear of an aircraft fuselage;
- Figure 3 is a very schematic view of a propulsion unit fixed in a central position at the rear of an aircraft fuselage;
- Figure 4 is a view similar to that of Figure 3 and illustrates a mounting operation of a gas generator of the propulsion assembly
- Figure 5 is a view similar to that of Figure 1 and illustrates a method of fixing a gas generator of the propulsion assembly
- Figure 6 is a view similar to that of Figure 3 and illustrates a method of fixing a gas generator of the propulsion assembly
- Figure 7 is a view similar to that of Figure 1 and illustrates an embodiment of a propulsion assembly according to the invention
- Figure 8 is a view similar to that of Figure 3 and illustrates an embodiment of a propulsion assembly according to the invention
- Figure 9 is a schematic front view of a downstream edge of an air inlet of the propulsion assembly of Figure 7 or 8;
- Figure 10 is a schematic front view of an upstream edge of the gas generator of the propulsion assembly of Figure 7 or 8;
- Figure 11 is a view on a larger scale of part of Figure 7 and shows a sealing system in the operating position;
- Figure 12 is a view similar to that of Figure 11 and illustrates an assembly/disassembly step of a method according to the invention
- Figure 13 is a view similar to that of Figure 11 and illustrates another assembly/disassembly step of a method according to the invention
- Figures 14 to 16 are schematic views in axial section of seal variants of a sealing system
- Figure 17 is a flowchart comprising the steps of a method according to the invention for mounting a propulsion assembly.
- Figure 18 is a flowchart comprising the steps of a method according to the invention for dismantling a propulsion unit.
- Figures 7 and 8 show that the propulsion unit 100 according to the invention can be mounted in a lateral position, for example under a wing 12 of an aircraft ( Figure 7) or in a central position, for example at the rear of the fuselage 14 of the aircraft (FIG. 8).
- the 100 propulsion package includes:
- gas generator 102 having a longitudinal axis A and comprising at least one compressor 104, one combustion chamber 106 and at least one turbine 108 arranged one behind the other along said axis,
- an air inlet 110 of generally tubular shape arranged, for example coaxially, upstream of the gas generator 102 with reference to the flow of gases in operation (arrows F2), and
- sealing system 112 of generally annular shape interposed axially between the air inlet 110 and the gas generator 102, the sealing system 112 being configured to provide sealing between a downstream edge 110a of the inlet air 110 and an upstream edge 102a of the gas generator 102, these edges being configured to be separate from each other and therefore to remain separate during operation of the propulsion assembly 100.
- the air inlet 110 can have a tubular or straight cylindrical shape, as shown in Figure 7, or can have a more complex shape, for example S-shaped section, as shown in FIG. 8.
- the air inlet 110 is fixed by first fixing means, not shown, to the structure of the aircraft.
- the gas generator 102 is fixed by second fixing means, not shown, to the structure of the aircraft, the second fixing means being independent of the first fixing means.
- These fixing means may for example comprise shear pins 22 as shown in Figure 6.
- the sealing system 112 is best visible in Figure 11 and essentially comprises two parts, namely:
- a compression ring 114 which comprises a first axial end 114a for mechanical connection to the aforementioned edge of a first of the elements chosen from among the gas generator 102 and the air inlet 110, and a second opposite axial end 114b intended to be separated axially from the aforesaid edge of a second of the elements by an annular space 116, this space having an axial dimension which can be reduced by bringing the compression ring closer to the second element, and
- annular seal 118 mounted in this space 116 and configured to be compressed axially by reducing the axial dimension of this space.
- the ring of compression ring 114 is fixed by its first end 114a, therefore located downstream, to the gas generator 102.
- the first end 114a of the compression ring 114 can comprise or be formed by an annular flange 114c which is intended to be fixed by means of screws 120 or the like on a complementary annular flange 102b located on the edge 102 of the gas generator 102 (FIGS. 10 and 11).
- the flanges 102b, 114c are applied axially against each other and are fixed by the screws 120 which pass through holes 122 of these flanges102b, 114c.
- the opposite axial end 114b of the compression ring 114 is therefore intended to be separate from the edge 110a of the air inlet 110, the seal 118 being interposed axially in the space 116 located between the end 114b and the edge 110a.
- the compression ring 114 comprises a cylindrical body and may further comprise:
- annular acoustic attenuation wall or lining an annular acoustic attenuation wall or lining
- the end 114b and the edge 110a are advantageously equipped with means making it possible to apply a tensile force from the compression ring 114 towards the air inlet 110, and therefore a force which tends to bring the compression ring closer towards the air inlet, which will cause a reduction in the axial dimension of the space 116 and will result in a compression of the seal 118 (transition from the state of figure 12 to the state of figure 13) .
- the edge 110a of the air inlet 110 is equipped with clevises 124 projecting radially outwards with respect to the axis A. These clevises 124 are located opposite similar clevises 126 of the end 114b of the compression ring 114.
- the clevises 124, 126 comprise holes 128 for passing screws 130 or the like intended to be used to force the compression of the ring 114 as mentioned in what precedes and as shown in Figures 12 and 13.
- yokes 124, 126 could be replaced by annular flanges similar to flanges 102b, 114c.
- the screws 130 could be replaced by clamps or any other means capable of bringing the compression ring 114 closer to the air inlet 110.
- the assembly of the compression ring 114 could be reversed and would thus be fixed by its end 114a to the air inlet 110. Its end 114b would then be separated from the gas generator 102 and separated from it by seal 118.
- Figure 11 shows the state of the sealing system 112 when the propulsion assembly 100 is operating or able to operate.
- the compression ring 114 is rigidly connected to the gas generator 102 and the seal 118 provides sealing between the air inlet 110 and the compression ring 114 and therefore between the air inlet 110 and the generator gas 102.
- the gas generator 102 and the air inlet 110 can be subjected to relative displacements, which can cause elastic deformations of the seal 118 which guarantees sealing in this zone.
- the seal 118 can be made of elastic material, such as elastomer, or of composite material.
- Seal 118 may include: - at least one annular part comprising an annular cavity 118a (FIGS. 11-13), this cavity being located in the space 116 and having in axial section a shape intended to be modified during the compression of the gasket, and/or
- At least one annular sealing lip 118c (Figure 15) providing sealing by bearing on an annular surface.
- the seal 118 may have in axial section a general shape L, , ir, O, etc.
- a sheet 130 can be attached and fixed to the internal periphery of the gasket 118 or the gasket can comprise a sheet 130 at its internal periphery. This sheet 130 is intended to be swept by the flow of air passing from the air inlet 110 to the gas generator and to protect the seal 118, for example from fire or possible debris impacts.
- Figures 12 and 13 illustrate states of the system 112 and of the seal 118 during an assembly or disassembly process.
- the joint 118 can adopt several states including:
- the seal 118 is for example configured to be compressed (passage from the free or constrained state to the compressed state) over an axial dimension at least equal to 5 mm and/or to a compression rate of at least 25%.
- the compression ratio corresponds to the ratio between (D2-D3) and D2, or between (D1-D3) and D1 in the aforementioned case.
- FIG. 17 illustrates steps for assembling the propulsion assembly 110 and FIG. 18 illustrates steps for disassembling this propulsion assembly.
- the assembly method comprises the steps of: a) positioning the sealing system 112 coaxially with the second element (the air inlet 110 in the example illustrated in the drawings), the second end 114b of the ring 114 facing the edge of this element and the gasket 118 being mounted in the space 116, b) bringing the second end 114b of the compression ring 114 closer to the edge of this second element so as to reduce the axial dimension of the gasket housing space 116 and thus to exert an axial compressive force on the gasket 118; the seal thus passes from the free or constrained state to the compressed state, c) moving the first element (the gas generator 110 in the example illustrated in the drawings) in a direction transverse to the axis A, until the first and second elements are axially aligned and the first end 114a of the ring 114 is separated by a predetermined axial distance from the edge of the first element (FIG.
- this distance corresponds to the difference between the aforementioned dimensions D2 and D3, d) eliminating the axial compression force of the joint 118 so that an elastic return of the joint causes the elimination of the aforementioned axial distance (figure 12), and e) fixing the first end 114a of the compression ring 114 to the edge of the first element (gas generator 102 - figure 11).
- the seal 118 preferably remains axially constrained in space at the end of step d) and during step e).
- Step b) can be carried out using clamps resting axially on the clevises 124, 126, or by using screws 120 passing through the orifices 128 of the clevises, as mentioned above (FIGS. 12 and 13).
- the dismantling method comprises the steps consisting in: f) separating the first end 114a of the compression ring 114 vis-à-vis the edge of the first element (gas generator 102); one thus passes from the situation represented in FIG. 11 to the situation represented in FIG. 12, g) bringing the second end 114b of the compression ring 114 closer to the edge of the second element (air inlet 110 ) so as to reduce the axial dimension (reduction from D2 to D3) of the seal housing space 116 and thus exert an axial compression force on the seal 118 (FIG.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2012769A FR3117170B1 (fr) | 2020-12-07 | 2020-12-07 | Ensemble propulsif pour un aeronef et son procede de montage |
| PCT/FR2021/052164 WO2022123146A1 (fr) | 2020-12-07 | 2021-12-01 | Ensemble propulsif pour un aeronef et son procede de montage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4256186A1 true EP4256186A1 (fr) | 2023-10-11 |
Family
ID=74758974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21836593.0A Pending EP4256186A1 (fr) | 2020-12-07 | 2021-12-01 | Ensemble propulsif pour un aeronef et son procede de montage |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12110120B2 (fr) |
| EP (1) | EP4256186A1 (fr) |
| FR (1) | FR3117170B1 (fr) |
| WO (1) | WO2022123146A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3159205B1 (fr) * | 2024-02-13 | 2026-01-02 | Safran Aircraft Engines | Dispositif de fixation à vis et anneau de maintien plat pour pièces à bride annulaire et procédé de fixation avec ce dispositif |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1751550C3 (de) * | 1968-06-18 | 1975-04-17 | Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen | Dichtung zwischen dem Einlauf eines Strahltriebwerkes und einem zellenfesten Aufnahmering des Einlaufgehäuses |
| US3879941A (en) * | 1973-05-21 | 1975-04-29 | Gen Electric | Variable cycle gas turbine engine |
| US4361296A (en) * | 1980-03-10 | 1982-11-30 | The Boeing Company | Uniflange coupling assembly |
| GB9301457D0 (en) * | 1993-01-26 | 1993-03-17 | Short Brothers Plc | An aircraft propulsuve power unit |
| GB2385382B (en) * | 2002-02-13 | 2006-02-15 | Rolls Royce Plc | A cowl structure for a gas turbine engine |
| GB2407134B (en) * | 2003-10-16 | 2008-04-16 | Rolls Royce Plc | Aircraft engine mounting assembly |
| GB2436353B (en) * | 2006-03-22 | 2008-04-23 | Rolls Royce Plc | Panel assembly including deformable seal |
| US10077669B2 (en) * | 2014-11-26 | 2018-09-18 | United Technologies Corporation | Non-metallic engine case inlet compression seal for a gas turbine engine |
| US11098652B2 (en) * | 2019-05-29 | 2021-08-24 | Raytheon Technologies Corporation | Isolation seals for gas turbine engines |
| BR102022003769A2 (pt) * | 2021-05-04 | 2022-11-16 | The Boeing Company | Estrutura de entrada de nacele de um conjunto de motor |
| US12188409B2 (en) * | 2021-10-06 | 2025-01-07 | Rtx Corporation | Gas turbine engine with acoustic liner |
-
2020
- 2020-12-07 FR FR2012769A patent/FR3117170B1/fr active Active
-
2021
- 2021-12-01 WO PCT/FR2021/052164 patent/WO2022123146A1/fr not_active Ceased
- 2021-12-01 US US18/255,025 patent/US12110120B2/en active Active
- 2021-12-01 EP EP21836593.0A patent/EP4256186A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3117170A1 (fr) | 2022-06-10 |
| WO2022123146A1 (fr) | 2022-06-16 |
| FR3117170B1 (fr) | 2022-11-04 |
| US20240026798A1 (en) | 2024-01-25 |
| US12110120B2 (en) | 2024-10-08 |
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