EP4244468A1 - Dispositif de commande d'un système de guidage du flux d'air, notamment dans une turbomachine d'aéronef - Google Patents
Dispositif de commande d'un système de guidage du flux d'air, notamment dans une turbomachine d'aéronefInfo
- Publication number
- EP4244468A1 EP4244468A1 EP21810575.7A EP21810575A EP4244468A1 EP 4244468 A1 EP4244468 A1 EP 4244468A1 EP 21810575 A EP21810575 A EP 21810575A EP 4244468 A1 EP4244468 A1 EP 4244468A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- control rod
- angle
- actuator
- axis
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
- F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
-
- 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
- F05D2220/329—Application in turbines in gas turbines in helicopters
-
- 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
- F05D2260/00—Function
- F05D2260/40—Transmission of power
- F05D2260/406—Transmission of power through hydraulic systems
-
- 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
- F05D2260/50—Kinematic linkage, i.e. transmission of position
-
- 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
- F05D2260/60—Fluid transfer
Definitions
- TITLE Device for controlling an air flow guidance system, in particular in an aircraft turbine engine
- the present invention relates to the field of aircraft, and in particular aircraft turbine engines.
- the invention relates to the control of a system for guiding an air flow.
- a turbomachine comprises a compressor, a combustion chamber located at the outlet of said compressor, a high pressure turbine intended to rotate the compressor and a low pressure turbine intended to rotate the blades of the aircraft.
- the turbomachine further comprises a system for guiding the air flow, called “inlet guide vanes”, acronym “IGV” in Anglo-Saxon terms comprising a plurality of fins or variable-pitch inlet guide vanes, positioned upstream of the compressor and making it possible to improve the efficiency of the compressor, and thus the thermodynamic cycle of the engine at cruising speed.
- IGV inlet guide vanes
- Such a system contributes to reducing the fuel consumption of the aircraft.
- variable pitch we mean the synchronization of the angular position of all the blades of the same stage by means of a control ring or crown integral with all the blades. Each vane is connected to the control ring by a control rod.
- a jack system fixed to a casing and comprising a piston that can be moved in a jack chamber between two extreme positions of a nominal operating range of the engine, the piston being connected to the crown of control by a control rod.
- the vanes are continuously movable between a first angle and a second angle.
- the control of the displacement of the piston is generally carried out by a distributor of fluid, for example of oil during a hydraulic control.
- the object of the present invention is therefore to overcome the drawbacks of the control devices of the aforementioned air flow guidance systems.
- the object of the invention is to improve the safety in the event of failure of an element of the blade control kinematics.
- the subject of the invention is therefore a control device for a system for guiding the air flow comprising at least one mobile blade rotating around an axis of rotation between a first angle and a second angle, the control device comprising at least one actuator configured to drive a control rod in translation between a first extreme position and a second extreme position of a nominal operating range in which the blade is movable between the first angle and the second angle, the control being connected to the axis of the blade by a control lever articulated with respect to a free end of the control rod opposite the end connected to the actuator.
- the control lever includes a first control link and a second control link.
- Said first link comprises a first end articulated with respect to the free end of the control rod and a second end, articulated with respect to a first end of the second link, said second link further comprising a second end, opposite to the first end and integral in rotation with the blade.
- the actuator is configured to bring the control rod into a safety position located beyond the second extreme position of the nominal operating range and to orient the vane through an angle of secure wedging between the first angle and the second angle.
- the safety position and the safe wedging angle correspond to a so-called safety position allowing the passage of an air flow even in the event of failure of the control device.
- the position of the piston and the pitch angle of the blades are known at any time, and this in a reliable manner.
- the actuator is configured to transmit a purely axial movement to the control rod along an axis of movement of said actuator.
- control lever comprises only the first and the second control rods which are hinged together and connected by a ball joint.
- the airflow guidance system can be a vane of the type with inlet guide vanes or with variable pitch called “inlet guide vanes", acronym “IGV” in Anglo-Saxon terms, comprising a plurality of fins or stator vanes comprising a main vane connected to the control lever and a plurality of secondary vanes whose movement is synchronized with the movement of the main vane, the control device further comprising a control ring or ring connected to the control lever control and connected to the secondary vanes via secondary links, the axis of rotation of the vanes being perpendicular to the axis of the control ring.
- IGV in Anglo-Saxon terms
- Each secondary vane is thus connected to the control ring by a control rod.
- variable pitch blades we mean the synchronization of the position of all the secondary blades with respect to the main blade.
- stator vanes vanes carried by the stator and mobile in rotation around their own axis of rotation.
- the second control rod has a length substantially equal to the lengths of the secondary rods, the control ring being articulated on said second control rod at a point coinciding with the ball joint between the two control rods .
- the second control rod has a length greater than the lengths of the secondary rods, the control ring being articulated on said second control rod at a point distant from the ball joint between the two control rods.
- control device may comprise two actuators, for example diametrically opposed.
- the actuator may comprise an actuator rod connected to the control rod by a rigid connection or by a ball joint.
- the actuator may be a cylinder comprising a body defining a cylindrical chamber inside which is mounted in translation a piston having one end connected to the control rod, the piston being configured to perform an overtravel during movement of the control rod into the safety position.
- the body of the cylinder may comprise two orifices opening into the chamber for the entry and exit of a fluid, intended to cause the piston to slide inside the said cylinder body along the axial axis.
- the cylinder chamber is supplied with fluid, for example oil, by an external energy source supplying the fluid into the cylinder chamber via the first port. Under the effect of the pressure exerted by the fluid on the rear face of the piston, the latter moves axially along its axis, together with the control rod.
- the external power source can be a hydraulic control system comprising a distributor or servo valve configured to distribute the fluid in the cylinder chamber. Depending on the servo valve, it is possible to know the stroke of the piston.
- the invention relates to an aircraft turbine engine comprising, from upstream to downstream in the direction of flow of the air flow, an inlet sleeve receiving air, a centrifugal compressor, an annular combustion chamber, located downstream of the compressor, a high pressure power turbine intended to drive the compressor in rotation, an outlet turbine intended to rotate an output shaft, by means of a low-pressure shaft, an air flow guidance system positioned upstream of the compressor and a control device for said air flow guidance system such as than previously defined.
- the axis of rotation of the blade of the airflow system is perpendicular to the central axis of the turbomachine.
- the nominal operating range corresponds to the nominal operating range of the turbomachine.
- the actuator rod is movable along the axial axis of the turbomachine.
- the invention relates to a single-engine helicopter comprising a turbomachine as defined previously.
- FIG 1 very schematically illustrates a cross-sectional view of an aircraft turbine engine comprising a device for controlling an airflow guidance system according to the invention
- FIG 2 shows the flow guidance system of Figure 1
- FIG 3 is a perspective detail view of the control device of Figure 1;
- FIG 6 schematically represent three positions of the control device and the main blade of the flow guidance system of Figure 1; and [Fig 7] shows the flow guidance system according to another embodiment.
- upstream and downstream are defined with respect to the direction of air circulation in the turbomachine.
- FIG. 1 is shown very schematically an axial section of a turbomachine 10, central axis A which corresponds to the axis of a power shaft (or low pressure shaft) of the turbomachine.
- the turbomachine can equip, by way of non-limiting example, single-engine helicopters.
- the turbine engine 10 comprises, from upstream to downstream in the flow direction of the air flow, an inlet sleeve 11 receiving air, a centrifugal compressor 12, for example with one or two stages, configured to suck in the flow of air F.
- the turbomachine 10 further comprises an annular combustion chamber 13, for example with reverse flow, located downstream of the compressor 12, a high-pressure power turbine 14 intended to drive the compressor 12 in rotation by a high-pressure shaft 15 and an output turbine 16, for example, single-stage, intended to rotate an output shaft 17 via a low-pressure shaft 18, coaxial with the high-pressure shaft 15, and a reduction system 19.
- the output shaft 17 is connected to the blades of the aircraft.
- the turbomachine 10 further comprises a system for guiding the air flow 20, called “inlet guide vanes”, acronym “IGV” in Anglo-Saxon terms comprising a plurality of fins or guide vanes with variable pitch 21, positioned upstream of the compressor 12.
- IGV inlet guide vanes
- variable pitch 21 positioned upstream of the compressor 12.
- the plurality of variable-pitch vanes 21 comprises a main vane 21a and a plurality of secondary vanes 21b whose movement is synchronized with the movement of the main vane 21.
- the blading 21 consisting of vanes 21a, 21b is said to be “statoric”, that is to say that each vane 21a, 21b is rotatable around its own axis of rotation.
- the axis of rotation of the blades 21a, 21b is here perpendicular to the central axis A of the turbomachine 10.
- the turbomachine 10 further comprises a device 30 for controlling the airflow guidance system 20.
- the control device 30 of the airflow system 20 comprises an actuator 31, a control rod 32 driven in translation by said actuator 31 and connected to the axis of the main blade 21a by a control lever 33.
- the control device 30 further comprises a control ring or crown 34 connected to the control lever 33 and articulated with respect to the latter and articulated with respect to secondary links 35 which are fixed in rotation to the secondary vanes 21b.
- each secondary vane 21b is connected to the control ring 34 by a link 35 control.
- variable pitch vanes we mean the synchronization of the position of all the secondary vanes 21b with respect to the main vane 21a.
- the axis of rotation of the vanes 21a, 21b is perpendicular to the axis of the control ring 34.
- the actuator 3 1 may be, in no way limiting, a jack comprising a body fixed to a casing (not referenced) and delimiting a cylindrical chamber inside which is mounted in translation a piston having one end connected to the rod command 32.
- the control rod 32 is connected to the axis of the blade 21a by the control lever 33 hinged with respect to a free end 32a of the control rod 32 opposite the end connected to the actuator 31.
- the cylinder body may comprise two openings in the chamber for the entry and exit of a fluid, intended to cause the piston to slide inside said cylinder body along an axis of movement X-X' substantially parallel to the central axis A of the turbomachine 10.
- the cylinder chamber is supplied with fluid, for example oil, by an external energy source conveying the fluid into the cylinder chamber via the first port.
- fluid for example oil
- the latter moves axially along the axis X-X', together with the control rod 32.
- the external power source can be a hydraulic control system comprising a distributor or servo valve configured to distribute the fluid in the cylinder chamber. Depending on the servo valve, it is possible to know the stroke of the piston.
- the cylinder piston is movable in translation in the chamber of the cylinder between two extreme positions of a nominal operating range of the turbomachine.
- the main vane 21a is continuously movable between a first angle al and a second angle a2 defined respectively between the main vane 21a and the axis horizontal parallel to the displacement axis X-X'.
- the fixed angle a visible in FIG. 2, is defined between the main blade 21a and a second control rod 37 integral in rotation with this main blade.
- the control device 30 is configured to guide the piston, and thus the control rod 32 to a safety position in which the stroke of the piston is known, and thus the opening angle of the blades 21a, 21b.
- the safety position PS corresponds to an open position of the blades in which the turbomachine can operate in a safe manner.
- the main blade 21a is moved from the second angle a2 to a safe angle aS.
- Safety position PS is one of positions P I , P2 away from the nominal operating range.
- the piston is configured to overtravel beyond one of its extreme positions.
- control lever 33 comprises two separate parts, namely a first control rod 36 and a second control rod 37.
- the first control rod 36 comprises a first end 36a articulated relative to the free end of the control rod 32, opposite the end connected to the piston and a second end 36b, articulated relative to a first end 37a of the second control rod 37.
- the two control rods 36, 37 are connected by a ball joint.
- the second control rod 37 further comprises a second end 37b, opposite the first end 37a hinged with respect to the first rod 36, integral in rotation with the main blade 21a.
- the second control rod 37 is fixed to the main blade 21a so as to be integral in rotation therewith, that is to say that the entire second rod rotates with the main blade 21a.
- the axis of rotation of the main blade 21a is referenced 20a.
- the free end of the piston is connected to the control rod 32 by a rigid connection or ball joint.
- the second control rod 37 has a length substantially equal to the lengths of the secondary links 35.
- the control ring 34 is articulated on said second control rod 37 at a point coinciding with the connection to ball joint between the two control rods 36, 37.
- the control rod 32 is configured to move only in translation along the axis of movement X-X' during the movement of the cylinder piston.
- the control rod 32 has a single degree of freedom, namely along the axis of displacement X-X'.
- FIG. 4 represents the first extreme position P I of the free end 32a of the control rod 32 when the actuator rod or piston is in the first extreme position of the nominal operating range of the turbomachine 10.
- the main blade 21a is open to a first angle al, for example between 45° and 75°, for example greater than or equal to 60°.
- FIG. 5 represents the second extreme position P2 of the free end of the control rod 32 when the actuator rod or piston is in the second extreme position of the nominal operating range of the turbomachine 10.
- the main blade 21a is progressively movable from the first angle a1 to a second angle a2, for example equal to 0°.
- the flow rate is maximum in this second extreme position.
- FIG. 6 represents the safety position PS of the free end of the control rod 32 when the actuator rod or piston overtravels or extends beyond the second extreme position of the nominal operating range of the turbomachine 10.
- the main blade 21a is progressively movable from the second angle a2 towards a safe pitch angle aS between the angles a1 and a2, for example between 5° and 15°, for example equal to 8°.
- the fixed angle a is provided equal to the safe wedging angle aS, so that when the safety position PS is reached, the second control rod 37 is oriented parallel to the axis of displacement X-X' .
- angles a and aS can be provided different from each other without departing from the scope of the invention.
- an additional overtravel of the actuator rod and therefore of the control rod 32, so as to move the safety position PS, would increase the value of the safety setting angle aS while the angle a remains fixed .
- the second control link 37 has a length greater than the lengths of the secondary links 35.
- the control ring 34 is articulated on said second link control 37 at a point distant from the ball joint between the two control rods 36, 37.
- a linear relationship is obtained between the position of the actuator rod 32 and the pitch angle of the main vane 21a.
- the use of the control device 30 is not limited to a turbomachine and can be used to ensure the movement of the control rod and thus the orientation of fins mounted upstream of a steered wheel towards a safety position in the event of failure of an element of said control device.
- the safe pitch angle of the vanes is included in the range of pitch angle useful for nominal operation of the steered wheel. This safe wedging angle is reached during an overtravel of an actuator rod of the control device. Thanks to the invention, it is possible to bring the control rod and thus the pitch angle of the blades towards a reliable safety position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Control Of Turbines (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2011526A FR3116080B1 (fr) | 2020-11-10 | 2020-11-10 | Dispositif de commande d’un système de guidage du flux d’air, notamment dans une turbomachine d’aéronef |
| PCT/EP2021/081232 WO2022101260A1 (fr) | 2020-11-10 | 2021-11-10 | Dispositif de commande d'un système de guidage du flux d'air, notamment dans une turbomachine d'aéronef |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4244468A1 true EP4244468A1 (fr) | 2023-09-20 |
Family
ID=73793537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21810575.7A Pending EP4244468A1 (fr) | 2020-11-10 | 2021-11-10 | Dispositif de commande d'un système de guidage du flux d'air, notamment dans une turbomachine d'aéronef |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11982192B2 (fr) |
| EP (1) | EP4244468A1 (fr) |
| CN (1) | CN116438366A (fr) |
| FR (1) | FR3116080B1 (fr) |
| WO (1) | WO2022101260A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3129971B1 (fr) * | 2021-12-07 | 2024-11-29 | Safran Helicopter Engines | Dispositif de commande d’un système de guidage du flux d’air, notamment dans une turbomachine d’aéronef |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2928979B1 (fr) * | 2008-03-19 | 2015-05-01 | Snecma | Dispositif de commande d'aubes a calage variable dans une turbomachine. |
| FR2936558B1 (fr) * | 2008-09-30 | 2016-11-11 | Snecma | Systeme de commande d'equipements a geometrie variable d'un moteur a turbine a gaz comportant notamment une liaison a barillet. |
| US9885291B2 (en) * | 2012-08-09 | 2018-02-06 | Snecma | Turbomachine comprising a plurality of fixed radial blades mounted upstream of the fan |
| FR3046409B1 (fr) * | 2016-01-05 | 2018-02-09 | Safran Aircraft Engines | Systeme de commande de l'orientation des pales de soufflante d'une turbomachine a pion de blocage de mise en drapeau |
| US10634000B2 (en) * | 2017-06-23 | 2020-04-28 | Rolls-Royce North American Technologies Inc. | Method and configuration for improved variable vane positioning |
| FR3082896B1 (fr) * | 2018-06-22 | 2021-06-04 | Safran Aircraft Engines | Ensemble pour la commande d'aubes a calage variable |
| EP4339440A3 (fr) * | 2018-08-08 | 2024-05-22 | Pratt & Whitney Canada Corp. | Système et procédé multimoteur |
-
2020
- 2020-11-10 FR FR2011526A patent/FR3116080B1/fr active Active
-
2021
- 2021-11-10 WO PCT/EP2021/081232 patent/WO2022101260A1/fr not_active Ceased
- 2021-11-10 US US18/034,988 patent/US11982192B2/en active Active
- 2021-11-10 CN CN202180076063.3A patent/CN116438366A/zh active Pending
- 2021-11-10 EP EP21810575.7A patent/EP4244468A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116438366A (zh) | 2023-07-14 |
| WO2022101260A1 (fr) | 2022-05-19 |
| US11982192B2 (en) | 2024-05-14 |
| FR3116080B1 (fr) | 2022-11-04 |
| US20230417156A1 (en) | 2023-12-28 |
| FR3116080A1 (fr) | 2022-05-13 |
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