Patents Assigned to Safran Transmission Systems
  • Publication number: 20240043134
    Abstract: A propulsion assembly for an aircraft comprising at least two electric motors configured to be disposed in a wing of the aircraft and each comprising a rotor having a motor shaft movable about a motor axis, at least one propeller borne by a propeller shaft movable about a propeller axis and mechanically coupled to the motor shaft of the at least two electric motors, the propeller axis being perpendicular to the motor axis of the at least two electric motors.
    Type: Application
    Filed: February 1, 2022
    Publication date: February 8, 2024
    Applicant: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Clément RAUCOULES, Boris Pierre Marcel MORELLI, Jordane Emile André PELTIER
  • Patent number: 11867259
    Abstract: 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: Grant
    Filed: November 4, 2021
    Date of Patent: January 9, 2024
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Guillaume Pierre Mouly, Adrien Louis Simon, Dhafer Ghribi
  • Patent number: 11859560
    Abstract: 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: Grant
    Filed: September 20, 2022
    Date of Patent: January 2, 2024
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Guillaume Pierre Mouly, Adrien Louis Simon, Guillaume Julien Beck, Simon Loic Clement Lefebvre
  • Publication number: 20230407765
    Abstract: 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: Application
    Filed: June 16, 2023
    Publication date: December 21, 2023
    Applicant: SAFRAN TRANSMISSION SYSTEMS
    Inventor: Abdallah BADIDI
  • Publication number: 20230383698
    Abstract: 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: Application
    Filed: October 8, 2021
    Publication date: November 30, 2023
    Applicants: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMS
    Inventors: Caroline Marie FRANTZ, Gilles Alain Marie CHARIER, Matthieu Bruno Francois FOGLIA, Adrien Louis SIMON
  • Publication number: 20230356858
    Abstract: 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: Application
    Filed: May 3, 2023
    Publication date: November 9, 2023
    Applicant: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Adrien Louis SIMON, Guillaume Julien BECK, Yohan DOUY, Jordane Emile André PELTIER, Jérémy David SEBAN
  • Patent number: 11808344
    Abstract: 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: Grant
    Filed: January 4, 2022
    Date of Patent: November 7, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Guillaume Pierre Mouly, Frederic Nicolas François Laisnez, Adrien Louis Simon
  • Patent number: 11808213
    Abstract: 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: Grant
    Filed: January 24, 2022
    Date of Patent: November 7, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Guillaume Pierre Mouly, Frédéric Nicolas François Laisnez, Adrien Louis Simon
  • Patent number: 11802514
    Abstract: 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: Grant
    Filed: July 7, 2020
    Date of Patent: October 31, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Clément Paul René Niepceron, Boris Pierre Marcel Morelli
  • Patent number: 11802515
    Abstract: 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: Grant
    Filed: December 11, 2020
    Date of Patent: October 31, 2023
    Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMS
    Inventors: Caroline Marie Frantz, Gilles Alain Marie Charier, Maeva Daphné Gros-Borot, Matthieu Bruno François Foglia, Adrien Louis Simon
  • Patent number: 11795875
    Abstract: 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: Grant
    Filed: April 15, 2021
    Date of Patent: October 24, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Adrien Louis Simon, Patrice Jocelyn Francis Gedin, Bálint Pap
  • Patent number: 11795881
    Abstract: 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: Grant
    Filed: September 5, 2018
    Date of Patent: October 24, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventor: Julien Viel
  • Publication number: 20230296168
    Abstract: 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: Application
    Filed: March 14, 2023
    Publication date: September 21, 2023
    Applicant: SAFRAN TRANSMISSION SYSTEMS
    Inventor: Juan-Luis MARCOS IZQUIERDO
  • Patent number: 11754002
    Abstract: 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: Grant
    Filed: July 7, 2020
    Date of Patent: September 12, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Clément Paul René Niepceron, Boris Pierre Marcel Morelli
  • Patent number: 11739829
    Abstract: 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: Grant
    Filed: November 9, 2021
    Date of Patent: August 29, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Guillaume Julien Beck, Patrice Jocelyn Francis Gedin, Simon Loic Clement Lefebvre, Balint Pap, Quentin Pierre Henri Pigott, Adrien Louis Simon
  • Publication number: 20230265813
    Abstract: 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: Application
    Filed: April 11, 2023
    Publication date: August 24, 2023
    Applicants: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMS
    Inventors: Maeva Daphné GROS-BOROT, Gilles Alain Marie CHARIER, Matthieu Bruno Francois FOGLIA, Coroline Marie FRANTZ, Adrien Louis SIMON
  • Patent number: 11732608
    Abstract: 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: Grant
    Filed: December 20, 2019
    Date of Patent: August 22, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Mathieu Jean Charrier, Gilles Gaston Jacques Gouin, Boris Pierre Marcel Morelli
  • Patent number: 11725592
    Abstract: 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: Grant
    Filed: December 11, 2020
    Date of Patent: August 15, 2023
    Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN TRANSMISSION SYSTEMS
    Inventors: Caroline Marie Frantz, Gilles Alain Marie Charier, Adrien Louis Simon
  • Patent number: 11708889
    Abstract: 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: Grant
    Filed: July 25, 2022
    Date of Patent: July 25, 2023
    Assignee: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Balint Pap, Jordane Emile André Peltier, Antoine Jacques Marie Pennacino
  • Publication number: 20230203963
    Abstract: 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: Application
    Filed: May 19, 2021
    Publication date: June 29, 2023
    Applicant: SAFRAN TRANSMISSION SYSTEMS
    Inventors: Jordane Emile André PELTIER, Boris Pierre Marcel MORELLI