Patents Assigned to Safran Transmission Systems
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Patent number: 11867259Abstract: A mechanical gearbox for turbomachine, in particular for aircraft. The gearbox includes a sun gear including an external toothing, a ring gear including an internal toothing, and planet gears which are meshed with the sun gear and the stationary ring gear. The planet gears are carried by a movable planet carrier and each having external toothings of different diameters. The movable planet carrier includes a movable ring gear which carries an internal toothing and which is independent of the stationary ring gear, each of the planet gears being meshed with the sun gear and the stationary and movable ring gears.Type: GrantFiled: November 4, 2021Date of Patent: January 9, 2024Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Guillaume Pierre Mouly, Adrien Louis Simon, Dhafer Ghribi
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Patent number: 11859560Abstract: A power transmission module for an aircraft, the module including a torque input connected to a turbine shaft, a first torque output and a second torque output, the power transmission module including a mechanical reducer including a sun gear forming the torque input, and planet gears carried by a planet carrier, wherein each of the planet gears includes at least three independent toothings and further includes a first toothing meshed with the sun gear, a second toothing meshed with an element forming one of the torque outputs, and a third toothing meshed with another element.Type: GrantFiled: September 20, 2022Date of Patent: January 2, 2024Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Guillaume Pierre Mouly, Adrien Louis Simon, Guillaume Julien Beck, Simon Loic Clement Lefebvre
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Publication number: 20230407765Abstract: Lubrication module for at least one lubrication station of a turbomachine, the lubrication module comprising at least one positive displacement pump including a pump body delimiting a main chamber configured to be in fluid communication with a main lubrication circuit and an auxiliary chamber configured to be in fluid communication with an auxiliary lubrication circuit, and a piston movably mounted in the pump body between an inactive configuration and an active configuration, the piston being configured to perform, in the active configuration, a pumping movement between a top dead center and a bottom dead center by cooperation with a cam of a shaft of the turbomachine and, in the inactive configuration, not to cooperate with the cam of the shaft of the turbomachine, the positive displacement pump including a return element configured to return the piston to the active configuration.Type: ApplicationFiled: June 16, 2023Publication date: December 21, 2023Applicant: SAFRAN TRANSMISSION SYSTEMSInventor: Abdallah BADIDI
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Publication number: 20230383698Abstract: A propulsion system includes a drive shaft that rotates about an axis, a fan, a fan shaft that drives the fan about the axis, a reduction mechanism coupling the drive and fan shafts, a compression section driven by the drive shaft, and an inlet channel that extends between the fan and the compression section. The inlet channel includes inner and outer ferrules delimiting an air inlet flow path, the inner ferrule having a minimum radius. The reduction mechanism includes two reduction stages including two or more planet gears circumferentially distributed around the axis, each planet gear including a first portion meshed with the drive shaft and a second portion meshed with the fan shaft and being mounted fixed with respect to the inner ferrule and having a maximum radius greater than the minimum radius such that the air inlet flow path extends partly between the two or more planet gears.Type: ApplicationFiled: October 8, 2021Publication date: November 30, 2023Applicants: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMSInventors: Caroline Marie FRANTZ, Gilles Alain Marie CHARIER, Matthieu Bruno Francois FOGLIA, Adrien Louis SIMON
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Publication number: 20230356858Abstract: A pre-assembly method for an aircraft turbomachine, having preliminary assembling, outside the turbomachine, the following components with each other a reduction gear configured to transmit a rotation between at least two rotors of the turbomachine while modifying the speed and torque ratio from one to the other of said at least two rotors, a shaft kinematically coupled to the reduction gear and configured to be kinematically coupled to one of said at least two rotors, a bearing support, and at least one bearing mounted on the bearing support and configured to rotatably support the shaft.Type: ApplicationFiled: May 3, 2023Publication date: November 9, 2023Applicant: SAFRAN TRANSMISSION SYSTEMSInventors: Adrien Louis SIMON, Guillaume Julien BECK, Yohan DOUY, Jordane Emile André PELTIER, Jérémy David SEBAN
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Patent number: 11808213Abstract: The present invention relates to a mechanical reducer (6) for a turbomachine, in particular an aircraft, this reducer (6) including: a sun gear extending around an axis (61) of rotation, a crown which extends around the sun gear and which is configured to be fixed in rotation around said axis (61), planet gears which are meshed with the sun gear and the crown and which are held by a planet carrier (62) which is configured to be movable in rotation about said axis (61), In addition, the oil distributor (65) comprises a plurality of oil distribution modules (67) assembled together, each module (67) comprising at least one lubrication pipe (68) having an inlet intended to receive oil and an outlet (69) adapted to lead the oil into an opening (63) of the planet carrier (62), the opening (63) being intended for lubricating the reducer.Type: GrantFiled: January 24, 2022Date of Patent: November 7, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Guillaume Pierre Mouly, Frédéric Nicolas François Laisnez, Adrien Louis Simon
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Patent number: 11808344Abstract: A planet carrier for a mechanical gearbox for a turbomachine includes a one-piece cage that extends about an axis of rotation defining an internal housing configured to receive a sun gear and planet gears of the gearbox. The planet carrier further includes a lubrication system with at least one bore formed in the cage and extending parallel to the axis over more than 30% of a maximum axial dimension (Lmax) of the cage. The lubrication system also includes for the at least one bore, at least two sprinklers which are fitted to the cage and which are each mounted in a recess of the cage.Type: GrantFiled: January 4, 2022Date of Patent: November 7, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Guillaume Pierre Mouly, Frederic Nicolas François Laisnez, Adrien Louis Simon
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Patent number: 11802515Abstract: A propulsion system includes a drive shaft, a fan, a fan shaft, and a reduction device coupling the drive and fan shafts. The reduction device includes a first reduction stage and a second reduction state, and include a sun gear, centered on an axis of rotation of the drive and fan shafts and driven in rotation by the drive shaft, a ring gear, coaxial with the sun gear and that drives the fan shaft in rotation about the axis, and planet gears distributed circumferentially about the axis between the sun and ring gears, each planet gear including a first portion which is meshed with the sun gear and a second portion which is meshed with the ring gear, a diameter of the first portion being different from a diameter of the second portion, and an oil transfer bearing positioned between the fan and the reduction device.Type: GrantFiled: December 11, 2020Date of Patent: October 31, 2023Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMSInventors: Caroline Marie Frantz, Gilles Alain Marie Charier, Maeva Daphné Gros-Borot, Matthieu Bruno François Foglia, Adrien Louis Simon
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Patent number: 11802514Abstract: An epicyclic reduction gear for a turbomachine includes a sun gear that is rotatable about a first axis and a ring gear surrounding the sun gear and also rotatable about the first axis. The ring gear is secured to a ring gear carrier that rotates a fan shaft. At least one planet gear is rotatable about a second axis and is meshed with the sun gear and the ring gear. The planet gear is guided in rotation about the second axis relative to a bearing of the planet carrier. A piece of equipment comprising a rotor. The piece of equipment is attached to the bearing of the planet carrier and has a rotor rotated by the ring gear carrier.Type: GrantFiled: July 7, 2020Date of Patent: October 31, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Clément Paul René Niepceron, Boris Pierre Marcel Morelli
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Patent number: 11795881Abstract: The invention relates to an accessory relay box (10, 110, 210) for a turbomachine having a front lateral face (16, 116, 216), a rear lateral face (18, 118, 218) opposite the front face laterally delimiting the accessory box in which is mounted at least one gear train composed of several gear wheels (14) meshing together, each gear wheel (14) being carried by a central shaft (28), characterised in that the shafts (28) are guided in rotation by rolling bearings (30) all carried by the same support (12, 112, 212) inserted laterally between the front (16, 116, 216) and rear (18, 118, 218) faces.Type: GrantFiled: September 5, 2018Date of Patent: October 24, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventor: Julien Viel
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Patent number: 11795875Abstract: The present invention relates to an oil transfer device (1) for lubricating a planet carrier, movable in rotation, of an epicyclic gear train for a turbomachine, the device (1) extending around an axis (A) and having: an annular casing (11) which extends around the axis (A), the casing (11) comprising a plurality of oil feed grooves (14), axially juxtaposed, each having an oil ejection opening configured to lead radially to a lubrication circuit of the planet carrier to be lubricated, the device (1) being characterized in that one of the oil feed grooves (14) is a high-pressure oil feed groove (14), called a high-pressure groove (14a), and another of the other oil feed grooves (14) is a low-pressure oil feed groove (14), called a low-pressure groove (14b), axially juxtaposed to the high-pressure groove (14a), the grooves (14) being arranged axially along the axis (X) so that the oil is able to be transferred axially from the high-pressure groove (14a) to the low-pressure groove (14b).Type: GrantFiled: April 15, 2021Date of Patent: October 24, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Adrien Louis Simon, Patrice Jocelyn Francis Gedin, Bálint Pap
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Publication number: 20230296168Abstract: The invention relates to a lubricating oil deflector for a speed reduction gear of a turbomachine, the deflector comprising a body having a first end intended to be disposed facing a sun gear of the reduction gear, the first end being configured to receive oil from the sun gear and an opposite second end configured to discharge the oil from the body, the body including two side faces each intended to be disposed facing a planet gear of the reduction gear and each connecting the first and second ends together, the body including at least one inner oil guide channel that opens out at the first end and at the second end and is configured to discharge the oil by gravity through the second end.Type: ApplicationFiled: March 14, 2023Publication date: September 21, 2023Applicant: SAFRAN TRANSMISSION SYSTEMSInventor: Juan-Luis MARCOS IZQUIERDO
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Patent number: 11754002Abstract: The invention relates to an epicyclic reduction gear for a turbomachine, including a sun wheel that is rotatable about a first axis (A); a ring gear surrounding the sun wheel and being rotatable about the first axis (A); at least one planetary gear that is rotatable about a second axis (B), the planetary gear being meshed with the sun wheel and the ring gear; an immobile planet carrier, the planetary gear being rotatably guided about the second axis (B) with respect to a bearing of the planet carrier; an item of equipment including a rotor. The invention is characterized in that the item of equipment is fastened to the bearing of the planet carrier and the rotor of the item of equipment is rotatably driven by the planetary gear.Type: GrantFiled: July 7, 2020Date of Patent: September 12, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Clément Paul René Niepceron, Boris Pierre Marcel Morelli
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Patent number: 11739829Abstract: A mechanical reduction gear for a turbomachine, in particular for an aircraft, the reduction gear including a sun gear, a ring gear, planet gears which are meshed with the sun gear and the ring gear, hydrodynamic bearings for guiding the planet gears in rotation, these bearings being carried by a planet carrier and including cylindrical bodies which are engaged in the planet gears and which are configured so as to be supplied with oil and so as to form guiding oil films between the bodies and the planet gears, wherein each of the planet gears is guided by two hydrodynamic bearings independent of each other and disposed on either side of the plane.Type: GrantFiled: November 9, 2021Date of Patent: August 29, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Guillaume Julien Beck, Patrice Jocelyn Francis Gedin, Simon Loic Clement Lefebvre, Balint Pap, Quentin Pierre Henri Pigott, Adrien Louis Simon
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Publication number: 20230265813Abstract: A propulsion system includes a drive shaft movable in rotation about an axis of rotation, a low-pressure compressor driven in rotation by the drive shaft, the low-pressure compressor having a mean radius, a fan shaft, a fan driven in rotation by the fan shaft, a reduction mechanism coupling the drive shaft and the fan shaft, having a reduction ratio, and an inlet channel which extends between the fan and the low-pressure compressor, the inlet channel having an inlet adjacent to the fan and an outlet opposite the inlet and adjacent to the low-pressure compressor, the inlet having a mean radius. A first ratio between a ratio of a mean radius of the inlet channel and the mean radius of the low-pressure compressor, and the reduction ratio of the reduction mechanism, is strictly less than 0.35.Type: ApplicationFiled: April 11, 2023Publication date: August 24, 2023Applicants: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMSInventors: Maeva Daphné GROS-BOROT, Gilles Alain Marie CHARIER, Matthieu Bruno Francois FOGLIA, Coroline Marie FRANTZ, Adrien Louis SIMON
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Patent number: 11732608Abstract: Lubricating oil distributor for a mechanical reduction gear of a turbine engine, in particular of an aircraft, wherein it has a general annular shape around an axis X and is formed of a single part, the distributor including first and second independent oil circuits, the first oil circuit including a first oil inlet connected by a first annular chamber to several oil outlets, and the second oil circuit including a second oil inlet connected by a second annular chamber to several oil outlets, the first chamber including a section that is at least partially nested in a section of the second chamber.Type: GrantFiled: December 20, 2019Date of Patent: August 22, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Mathieu Jean Charrier, Gilles Gaston Jacques Gouin, Boris Pierre Marcel Morelli
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Patent number: 11725592Abstract: A propulsion system includes a drive shaft movable about an axis of rotation, a fan, a fan shaft that drives the fan, and a reduction device coupling the drive shaft and the fan shaft. The reduction device has first and second reduction stages and includes a sun gear, centered on the axis and driven by the drive shaft, a ring gear that is coaxial with the sun gear and that drives the fan shaft about the axis, and planet gears distributed circumferentially about the axis between the sun gear and the ring gear. Each planet gear includes a first portion meshed with the sun gear and a second portion meshed with the ring gear. A diameter of the first portion is different from a diameter of the second portion, and the first portion of the planet gears extend between the second portion of the planet gears and the fan.Type: GrantFiled: December 11, 2020Date of Patent: August 15, 2023Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMSInventors: Caroline Marie Frantz, Gilles Alain Marie Charier, Adrien Louis Simon
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Patent number: 11708889Abstract: A pivot (14) with a longitudinal axis (Y) for a bearing of a mechanical reduction gear, comprising a first annular part (14a) including an axial passage (17) and a second annular part (14b) mounted around the first annular part (14a), the first annular part (14a) delimiting with the second annular part (14b) a lubrication circuit at least one oil inlet (20) of which opens out inwards of the first annular part (14a) into the axial passage (17) and at least one oil outlet (28) of which opens radially outwards of the second annular part (14b).Type: GrantFiled: July 25, 2022Date of Patent: July 25, 2023Assignee: SAFRAN TRANSMISSION SYSTEMSInventors: Balint Pap, Jordane Emile André Peltier, Antoine Jacques Marie Pennacino
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Publication number: 20230203963Abstract: A turbomachine includes a fan, a first casing with longitudinal axis X in which a motor shaft is rotated around the longitudinal axis X, a second casing surrounding and coaxial with the first casing, and a drive shaft connected to the motor shaft. The driveshaft is also connected to at least two electric machines via a power transmission angle gear device housed in a housing. The electric machines being intended are configured to take or inject power on the motor shaft. The housing has a coupling surface to which the two electric machines are coupled.Type: ApplicationFiled: May 19, 2021Publication date: June 29, 2023Applicant: SAFRAN TRANSMISSION SYSTEMSInventors: Jordane Emile André PELTIER, Boris Pierre Marcel MORELLI
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Patent number: 11686217Abstract: An oil collector for a torque transmission device of an aircraft turbine engine, this oil collector being configured to collect sprayed oil, wherein it includes at least one wall formed at least in part by a mesh structure, and at least one recovery device located at one end of the wall and configured to recover the oil captured by the wall and intended to flow from this wall to the recovery device.Type: GrantFiled: November 10, 2021Date of Patent: June 27, 2023Assignees: SAFRAN, SAFRAN TRANSMISSION SYSTEMSInventors: Boris Pierre Marcel Morelli, Xavier Roger Betbeder-Lauque, Mathieu Jean Charrier