EP4232693A1 - Aube de soufflante à dièdre nul en tête - Google Patents
Aube de soufflante à dièdre nul en têteInfo
- Publication number
- EP4232693A1 EP4232693A1 EP21807180.1A EP21807180A EP4232693A1 EP 4232693 A1 EP4232693 A1 EP 4232693A1 EP 21807180 A EP21807180 A EP 21807180A EP 4232693 A1 EP4232693 A1 EP 4232693A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- equal
- fan
- chord
- less
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
-
- 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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
- F01D21/045—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position special arrangements in stators or in rotors dealing with breaking-off of part of rotor
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/282—Selecting composite materials, e.g. blades with reinforcing filaments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/06—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type with front fan
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/324—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
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
-
- 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
- F05D2250/00—Geometry
- F05D2250/30—Arrangement of components
- F05D2250/38—Arrangement of components angled, e.g. sweep angle
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
- F05D2300/603—Composites; e.g. fibre-reinforced
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
- F05D2300/603—Composites; e.g. fibre-reinforced
- F05D2300/6034—Orientation of fibres, weaving, ply angle
-
- 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
- the invention generally relates to the field of turbomachines, and more particularly that of the fan blades of these turbomachines and their method of manufacture.
- the invention applies more particularly to fan blades made of composite material and their interaction with the inlet of the primary stream.
- Turbomachine blades and in particular fan blades, undergo significant mechanical and thermal stresses and must meet strict weight and bulk conditions. It has therefore been proposed to use blades comprising aerodynamic blades made of a composite material comprising a fibrous reinforcement densified by a polymer matrix, which are lighter compared to metal blades with equivalent propulsive characteristics and which have resistance to satisfying warmth.
- the blades made of composite material generally comprise an attached metal shield fixed to the leading edge of the pale.
- the shield comprises, in a manner known per se, a solid nose configured to face the leading edge of the blade and two fins configured to cover part of the intrados wall and the extrados wall of the blade.
- fan blades are subject to ingestion by birds and hailstones.
- the preferred areas of initiation and propagation of damage are different.
- the mechanical behavior of fan blades is therefore optimized during the blade design phase to comply with certification rules.
- One object of the invention is to provide a fan blade and a fan for a turbomachine, in particular a fan of large diameter and comprising at most twenty fan blades, which guarantees the capacity of the fan to ensure at least 75 % of its take-off thrust despite a medium-sized bird strike.
- Another object of the invention is to provide a fan blade and a fan for a turbomachine, in particular a fan of large diameter and comprising at most twenty fan blades having an optimized aero-mechanical compromise.
- a fan blade of a turbomachine comprising:
- a composite material structure comprising a fibrous reinforcement obtained by three-dimensional weaving and a matrix in which the fibrous reinforcement is embedded, the composite material structure comprising a blade with an aerodynamic profile able to extend in an air flow comprising an edge leading edge and a trailing edge, a root configured to be attached to a fan disk and a stilt extending between the root and the blade, the blade having a predetermined height between the stilt and a tip of the blade along an axis stacking;
- the metal shield attached and fixed to the leading edge of the blade, the metal shield comprising a nose fixed to the leading edge.
- a blade chord is defined, in a plane normal to the stacking axis, between an upstream end of the nose of the shield and the trailing edge, and on a portion of the blade which extends from a lower limit located at a predetermined distance from the stilt at least equal to 80% of the predetermined height to the tip of the blade, a dihedral angle measured at at least one predefined point of the blade chord, located on the rope of dawn at the level of the upstream end of the nose of the shield, is greater than or equal to -3° and less than or equal to 0°.
- the nose and the fins of the shield together delimit a cavity housing the leading edge of the blade and the predefined point of the rope is located within the cavity;
- the dihedral angle is greater than or equal to -3° and less than or equal to 0° at several predefined points on the blade chord within the blade portion; within the portion, the dihedral angle is greater than or equal to - 3° and less than or equal to 0° over a distance at least equal to 10% of the predetermined height, preferably over a distance at least equal to 15 % of the predetermined height; within the portion, the dihedral angle is greater than or equal to -3° and less than or equal to 0° over the entire height of portion 15; within the portion, a variation in the dihedral angle along the stacking axis over a distance equal to 10% of the blade height is at most equal to 3°; within the portion, the dihedral angle is greater than or equal to
- the invention proposes a fan for a turbomachine comprising a plurality of fan blades according to the first aspect.
- the fan comprises at most twenty fan blades and/or has an external diameter of the fan of between eighty inches and one hundred inches, preferably between eighty inches and ninety inches.
- the invention proposes a turbomachine comprising a fan according to the second aspect.
- the turbomachine has a dilution ratio greater than or equal to 10, for example between 10 and 80 inclusive.
- the invention proposes an aircraft comprising at least one turbomachine conforming to the third aspect.
- Figure 1 schematically illustrates a blade according to a first embodiment of the invention.
- Figure 2 is a partial couple view of the front of the blade according to one embodiment of the invention.
- FIG. 3 is a schematic view of a fan rotor including blades in accordance with one embodiment of the invention, represented in section along a plane perpendicular to the axis of revolution of the fan.
- FIG. 4 is a cross-sectional view of the blade according to one embodiment of the invention, according to a plane which is on the one hand parallel to the axis of rotation of the fan and on the other hand perpendicular to a direction in which blade extends radially.
- Figure 5 is a schematic perspective view of the fan rotor having blades according to the invention.
- FIG. 6 is a schematic view of an aircraft comprising a turbomachine comprising a fan provided with blades according to the invention.
- the upstream and the downstream are defined with respect to the normal flow direction of the gas in the fan 1 through the turbomachine.
- the axis of revolution of the fan 1 turbomachine is called the axis X of radial symmetry of the fan 1.
- the axial direction corresponds to the direction of the axis X of the fan 1, and a radial direction is a direction perpendicular to this axis and passing through it.
- a turbomachine fan 1 comprises a fan disc 2 carrying a plurality of fan blades 3, associated where appropriate with inter-blade platforms.
- the invention applies in a privileged manner to a fan comprising at most twenty blades 3 in a turbine engine with a very high bypass ratio, that is to say whose bypass ratio is greater than or equal to 10, for example between 10 and 80 inclusive, for example more precisely 12 or 14 or 20 or greater than 20.
- a very high bypass ratio that is to say whose bypass ratio is greater than or equal to 10
- the flow rate of the secondary flow and the flow rate of the primary flow are measured when the turbomachine is stationary at take-off power in a standard atmosphere (as defined by the International Civil Aviation Organization (ICAO) manual, Doc 7488/3, 3rd edition) and at sea level.
- IAO International Civil Aviation Organization
- Each blade 3 comprises a composite material structure comprising a fibrous reinforcement 4 obtained by three-dimensional weaving and a matrix in which the fibrous reinforcement 4 is embedded.
- This composite material structure comprises a foot 5, a stilt 6 and an airfoil blade .
- the foot 5 is intended to allow the attachment of the blade to the fan disk 2 and extends for this purpose between a bottom of a cavity formed in the disk 2 and the outlet of the cavities of the cavity.
- the blade 7 with its aerodynamic profile is suitable for being placed in an air flow, when the turbomachine is in operation, in order to generate lift.
- stilt 6 corresponds to the zone of the blade 7 which extends between the foot 5 and the blade 7, that is to say between the outlet of the bearing surfaces of the disc 2 and the inter-blade platforms.
- the blade 7 also comprises, in a manner known per se, a leading edge 8, a trailing edge 9, an intrados wall and an extrados wall.
- the leading edge 8 is configured to extend opposite the flow of gases entering the turbomachine. It corresponds to the anterior part of an aerodynamic profile which faces the airflow and which divides the airflow into an underside flow and an underside flow.
- the trailing edge 9 for its part corresponds to the rear part of the aerodynamic profile, where the intrados and extrados flows meet.
- the blade 3 also includes a metal shield 12, attached and fixed to the leading edge 8 of the blade.
- the shield 12 comprises a solid nose 13, fixed to the leading edge 8, an intrados fin 14 and an extrados fin 14 plated and fixed to the intrados wall and the extrados wall of the blade 7, respectively .
- the shield 12 can in particular be fixed by gluing.
- the shield 12 can for example be made of a titanium alloy.
- the structure is formed of a plurality of blade sections 3 stacked from the root 5 in the direction of the apex 11 along a stacking axis Z extending radially with respect to the axis of revolution X of the fan 1
- a tangential stacking law of the blade then corresponds to the position of the center of gravity of each section of the blade in a plane normal to the stacking axis Z, with respect to this stacking axis Z.
- the stacking of the blade sections 7 can be defined by the sag and dihedral angles. These angles measure the differences in the directions between the flow and the blades, in projection respectively in a radial and axial plane and an axial and tangent plane to the direction of rotation of the turbomachine. Reference may in particular be made to the document by (y H. Smith et al. “Sweep and Dihedral Effects in Axial-Flow Turbomachinery”, September 1963, Journal of Basic Engineering, 401-414, for a more complete definition of deflection angle and dihedral angle D.
- the deflection angle expresses the inclination of the blade in the axial direction, and the dihedral angle D, the inclination of the blade in the tangential direction.
- a negative sign of the deflection angle expresses an inclination towards the upstream, and a positive sign, towards the downstream; and a negative sign of the dihedral angle D expresses an inclination towards the intrados, and a positive sign, towards the extrados. Inclinations are defined from outward radial directions.
- the blade 7 has a predetermined height h corresponding to the distance along the stacking axis Z between its lower limit 10, at the intersection with stilt 6, and its top 11.
- the predetermined height h of the blade 7 can for example be measured at the intersection between the leading edge 8 and the lower limit 10 of the blade 7.
- the blade 3 also has a chord (fictitious straight line segment) defined, in a plane normal to the stacking axis Z, between an upstream end 13a of the nose 13 of the shield 12 and the trailing edge 9.
- the upstream end 13a of the nose 13 corresponds to the leading edge of the blade 3, that is to say the upstream part of the shield 12 which actually divides the air flow into a lower surface flow and in an extrados flow.
- the leading edge 8 of the blade 7 meanwhile extends inside the shield 12, opposite the nose 13, in the extension of its upstream end 13a.
- a dihedral angle D (schematized in FIG. 3 and in FIG. 4) measured at at least one predefined point of the chord of blade 3 is greater than or equal to -3° and less than or equal to 0°.
- the dihedral angle D is greater than or equal to -3° and less than or equal to 0° over a distance at least equal to 10% of the predetermined height, preferably over a distance at least equal to 15% of the predetermined height. In one embodiment, the dihedral angle D is greater than or equal to ⁇ 3° and less than or equal to 0° over the entire height of the portion 15: in other words, in this embodiment, the dihedral angle D is greater than or equal to ⁇ 3° and less than or equal to 0° in each section of the blade 3, that is to say at the level of the at least one predefined point P of each chord C over the entire height of the portion 15, between 80% and 100% of the height h.
- the point of the chord at the level of which the dihedral angle D is measured is located at the level of the shield 12, that is to say within the cavity of the shield 12 which houses the leading edge and which is delimited by the nose 13 and the fins 14 of the shield 12.
- the point of the chord can extend at the level of the upstream end 13a of the nose 13 of the shield 12, that is to say at the level of the leading edge of the blade 3.
- This position of the point of the chord has the advantage of simplifying the measurement and checking of the dihedral angle D at the level of the portion 15, while guaranteeing that the portion 15 of the blade 3 is slightly inclined towards the lower surface and avoids the reversal of the fin 14.
- the dihedral angle D is greater than or equal to ⁇ 3° and less than or equal to 0° at several points of the chord.
- the dihedral angle D is closest to 0° while remaining negative.
- the dihedral angle D is preferably greater than or equal to -2°, typically greater than or equal to -1°, and less than or equal to 0°.
- the intrados and extrados fins 14 of the shield 12 can be lengthened in comparison with the prior art, thus reducing the risks of pinching of the fibrous reinforcement 4 in the event of ingestion (the fibrous reinforcement 4 being thicker at a distance from the leading edge 8).
- the intrados and extrados fins 14 extend over a length greater than or equal to 15% and less than or equal to 25% of the chord length of the blade.
- chord of the blade we will understand here the segment connecting the leading edge 8 and the trailing edge 7, in a plane normal to the stacking axis Z.
- chord length we will understand the length of this segment.
- length of a fin 14 we will understand here the projection of this fin 14 on the chord in the plane normal to the Z axis.
- the fan 1 has an external diameter of between eighty inches (203.2 centimeters) and one hundred inches (254.0 centimeters), of preferably between eighty inches (203.2 centimeters) and ninety inches (228.6 centimeters).
- the fibrous reinforcement 4 can be formed from a fibrous preform in one piece obtained by three-dimensional or multilayer weaving with varying thickness. It comprises warp and weft strands which may in particular comprise carbon, glass, basalt and/or aramid fibres.
- the matrix for its part is typically a polymer matrix, for example epoxy, bismaleimide or polyimide.
- the blade 3 is then formed by molding by means of a resin vacuum injection process of the RTM type (for "Resin Transfer Moulding), or else VARRTM (for Vacuum Resin Transfer Molding).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2010762A FR3115322B1 (fr) | 2020-10-20 | 2020-10-20 | Aube de soufflante à dièdre nul en tête |
| PCT/FR2021/051814 WO2022084615A1 (fr) | 2020-10-20 | 2021-10-19 | Aube de soufflante à dièdre nul en tête |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4232693A1 true EP4232693A1 (fr) | 2023-08-30 |
Family
ID=73699118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21807180.1A Pending EP4232693A1 (fr) | 2020-10-20 | 2021-10-19 | Aube de soufflante à dièdre nul en tête |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12435633B2 (fr) |
| EP (1) | EP4232693A1 (fr) |
| CN (1) | CN116348661A (fr) |
| FR (1) | FR3115322B1 (fr) |
| WO (1) | WO2022084615A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3115322B1 (fr) * | 2020-10-20 | 2022-10-14 | Safran Aircraft Engines | Aube de soufflante à dièdre nul en tête |
| FR3129687B1 (fr) * | 2021-11-29 | 2024-11-29 | Safran Aircraft Engines | Aube pour une hélice non carénée d’une turbomachine |
| US20250347292A1 (en) * | 2023-02-17 | 2025-11-13 | General Electric Company | Turbomachinery engines with high-speed low-pressure turbines |
| US20250376988A1 (en) * | 2023-02-17 | 2025-12-11 | General Electric Company | Turbomachinery engines with high-speed low-pressure turbines |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6331100B1 (en) * | 1999-12-06 | 2001-12-18 | General Electric Company | Doubled bowed compressor airfoil |
| US6328533B1 (en) * | 1999-12-21 | 2001-12-11 | General Electric Company | Swept barrel airfoil |
| EP2594805B1 (fr) * | 2010-07-15 | 2019-05-01 | IHI Corporation | Pale de rotor de soufflante et soufflante |
| US8684698B2 (en) * | 2011-03-25 | 2014-04-01 | General Electric Company | Compressor airfoil with tip dihedral |
| FR2981118B1 (fr) | 2011-10-07 | 2016-01-29 | Snecma | Disque aubage monobloc pourvu d'aubes a profil de pied adapte |
| FR2993942B1 (fr) * | 2012-07-24 | 2017-03-24 | Snecma | Aube composite de turbomachine a renfort structurel |
| US10724479B2 (en) * | 2013-03-15 | 2020-07-28 | United Technologies Corporation | Thrust efficient turbofan engine |
| WO2015126454A1 (fr) * | 2014-02-19 | 2015-08-27 | United Technologies Corporation | Surface portante de moteur à turbine à gaz |
| EP3108106B1 (fr) * | 2014-02-19 | 2022-05-04 | Raytheon Technologies Corporation | Pale de moteur à turbine à gaz |
| WO2015153411A1 (fr) * | 2014-04-02 | 2015-10-08 | United Technologies Corporation | Surface portante de moteur à turbine à gaz |
| FR3025735B1 (fr) * | 2014-09-17 | 2016-12-09 | Europe Tech | Procede de traitement d'une piece composite |
| US10221859B2 (en) * | 2016-02-08 | 2019-03-05 | General Electric Company | Turbine engine compressor blade |
| US10371097B2 (en) * | 2016-07-07 | 2019-08-06 | General Electric Company | Non-Newtonian materials in aircraft engine airfoils |
| US10578125B2 (en) * | 2016-11-24 | 2020-03-03 | Pratt & Whitney Canada Corp. | Compressor stator vane with leading edge forward sweep |
| GB201817935D0 (en) * | 2018-11-02 | 2018-12-19 | Rolls Royce Plc | Method of replacing a module |
| FR3090031B1 (fr) | 2018-12-14 | 2022-07-22 | Safran Aircraft Engines | Aube de soufflante comprenant un bouclier fin et un raidisseur |
| FR3115322B1 (fr) * | 2020-10-20 | 2022-10-14 | Safran Aircraft Engines | Aube de soufflante à dièdre nul en tête |
-
2020
- 2020-10-20 FR FR2010762A patent/FR3115322B1/fr active Active
-
2021
- 2021-10-19 EP EP21807180.1A patent/EP4232693A1/fr active Pending
- 2021-10-19 CN CN202180071539.4A patent/CN116348661A/zh active Pending
- 2021-10-19 WO PCT/FR2021/051814 patent/WO2022084615A1/fr not_active Ceased
- 2021-10-19 US US18/032,763 patent/US12435633B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20230392502A1 (en) | 2023-12-07 |
| US12435633B2 (en) | 2025-10-07 |
| CN116348661A (zh) | 2023-06-27 |
| WO2022084615A1 (fr) | 2022-04-28 |
| FR3115322B1 (fr) | 2022-10-14 |
| FR3115322A1 (fr) | 2022-04-22 |
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