Safran Transmission Systems

Snecma

Hispano Suiza

Safran Aircraft Engines

Julien Viel

Maxence Guillemont

Lionel Bauduin

Stéphane Prunera-Usach

Samuel Raymond Germain Becquerelle

Boris Morelli

Jordane Peltier

Bernard Brandt

Guy Desme

Claude Gallo

Fanélie Drevon

Antoine Barbe

Samuel Raymond Becquerelle

The invention relates to an accessory relay box () for a turbomachine having a front lateral face (), a rear lateral face () opposite the front face laterally delimiting the accessory box in which is mounted at least one gear train composed of several gear wheels () meshing together, each gear wheel () being carried by a central shaft (), characterised in that the shafts () are guided in rotation by rolling bearings () all carried by the same support () inserted laterally between the front () and rear () faces.

Accessory box for a turbomachine

A drive gearbox for turbomachine equipment, the drive gearbox having a main shaft intended to be rotationally connected to a power transmission shaft of a turbomachine. The main shaft has at least one bevel gear rotationally driving at least one piece of equipment. The gearbox has gear set with cylindrical gearwheels that have an input connected to the rotational drive to the main shaft and a plurality of outputs each intended to drive a piece of equipment. The gear set extends over an angular sector and the outputs are angularly spaced apart along the angular sector.

Equipment drive gearbox in a turbomachine

The present invention relates to a system for coupling an accessory box () of the engine () of an aircraft to an accessory box () of the aircraft, the engine accessory box being connected to a first shaft () inside which is slidably mounted a slide () carrying first coupling means () capable of cooperating with second coupling means () carried by a second shaft () connected to the aircraft accessory box () so as to couple the first () and the second () rotating shaft, wherein it further comprises electrical means for moving the slide () along the axis () of the first shaft () between a first uncoupling position with the second shaft and a second first coupling position with the second shaft.

System for coupling/uncoupling accessory boxes

A contactless seal intended for being fitted in a wall and a shaft passing through an opening of the wall, the seal comprising a rotary member intended for being supported by the shaft and a stationary member intended for being supported by the opening, the stationary member being inserted around the rotary member while being rotatably movable relative to same, the rotary member having an outer surface provided with at least one circumferential rib and the stationary member having an inner surface provided with at least one groove, or vice-versa. Each rib is partially inserted into a corresponding groove in order to form a labyrinthine leak path. The rotary member and the stationary member are each made up of a single part, and the rotary member and/or the stationary member are obtained by additive manufacturing.

Contactless labyrinth seal obtained by additive manufacturing

The invention relates to an assembly comprising a drive gearbox () for an aircraft () and an accessory (), the gearbox comprising: a connecting shaft () adapted to be driven by the propulsion system, a main shaft () adapted to be driven by the connecting shaft (), and two bevel gears () which are integral with the main shaft () and have different diameters (d, d), the accessory comprising: a high-speed accessory shaft () comprising a bevel gear (), a low-speed accessory shaft () comprising a bevel gear (), such that each gear () on the accessory shafts () meshes with one of the two bevel gears () on the main shaft (), so that the two accessory shafts () rotate at different speeds relative to one another.

Compact spinal transmission

An air-flow circuit for air flow through a bearing enclosure of a turbine engine, the air-flow circuit including a supply system arranged such as to supply the air into the bearing enclosure; a discharge system arranged such as to discharge at least some of the air from the bearing enclosure; an oil-removal system connected to the discharge system, the oil-removal system being capable of reducing the amount of lubricant contained in the air coming from the discharge system; and a compressor arranged between the discharge system and the oil-removal system, the compressor being capable of increasing the air pressure at the intake of the oil-removal system.

Air-flow circuit for air flow through a bearing enclosure

An oil jet for a turbine engine, comprising a body including a circulation pipe intended for the flow of a pressurized fluid. The jet's body comprises a first part and a second part between which a resiliently deformable membrane is inserted, said membrane being capable of deforming between a sealed position in which it prevents the circulation of the fluid in the pipe and a position in which it allows the circulation of fluid in the pipe. The second part includes bearing means configured to exert a force on the membrane positioned in the opposite direction to the circulation of fluid so as to preload the membrane when in blocked position.

Oil jet for turbine engine with housing including sealing membrane

A gearbox for an aircraft turbine engine includes a drive shaft, a secondary drive shaft coupled to the drive shaft with a reduction mechanism, and output shafts, each of which is coupled to the drive shaft or to the secondary drive shaft with a set of ring and pinion gears, wherein the reduction mechanism includes an intermediate shaft, a first end coupled to the drive shaft with a first stage of gears and the second end coupled to the secondary drive shaft with a second stage of gears, and wherein the intermediate shaft is rotatably mounted in the gearbox about the main axis thereof which is oriented substantially perpendicular to the main axis of the drive shaft.

Gearbox comprising an improved reduction gear

A device for filtering a flow of gas conveying liquid or solid particles in a flow channel. According to the invention, the particles are imparted a speed that is high enough to project same by inertia into the opening of a recovery channel formed inside the flow channel, while the gas from the flow bypasses said opening due to a specific configuration of the flow conditions of a perfect fluid in the flow channel and in the collection channel.

Filtering of a flow of gas/particles

An equipment support including at least one attachment including an output shaft, an input gear wheel, the input gear wheel being both rotated by the motor shaft at a main speed and also connected to the output shaft of the attachment in order to rotate it at a determined output speed, an input shaft, rotated by the input gear wheel at a determined input speed, and a reducer with magnetic gears, arranged between the input shaft and the output shaft, such that the input speed is different from the output speed.

Equipment support of a turbo machine comprising a reducer with magnetic gears

An accessory gearbox capable of driving the accessory devices of a gas turbine engine, such as an aircraft engine. Said accessory gearbox includes a housing and a plurality of gear wheels having axes that are parallel to one another inside the housing. The housing includes a means for attaching the accessory devices to the wall of the housing and driving them, via the gear wheels, through openings in the wall of the housing. The gear wheels are supported in the housing by rolling-element bearings. Each rolling element includes a first ring that is stationary relative to the housing, and a movable ring, secured to the gear wheel, wherein at least one of said gear wheels is supported by a single rolling element.

Accessory gearbox for gas turbine engine

A gearbox to be attached to a turbine engine to drive at least one apparatus annexed to the turbine engine, the gearbox including a housing; a power take-off member capable of engaging with a radial shaft of the turbine engine; at least one kinematic chain located inside the housing and capable of transmitting the rotational movement of the power take-off member to at least one rotatable shaft of an apparatus. The kinematic chain includes a first end and a second end. The power take-off member is linked to the kinematic chain by a gear having convergent axes and located between the first end and the second end of the kinematic chain.

Housing for driving an apparatus for a turbine engine

To overcome defects in the supply of pressurized lubricant, a hydrodynamic bearing for guiding a shaft () includes a stationary outer annular wall, a rotatable inner annular wall (), and a space () between the walls. The outer annular wall comprises an opening for supplying pressurized lubricant to the space so as to form a film of load-bearing fluid. The bearing includes a cavity () externally defined by the inner annular wall () and axially defined by two transverse annular walls (A,B) secured to the shaft () and arranged on both sides of the cavity. The inner annular wall () comprises fluid connection orifices () connecting the cavity () to the space (). The cavity () is divided into compartments () by a partition wall () configured such that the cavity forms a lubricant supply for a transient operational phase.

Hydrodynamic bearing

An accessory gearbox for turbomachine equipment comprising a casing () and two gear lines () arranged in a 'V' shape, the casing () comprising two arms () in both of which one of the two gear lines () is arranged, with a lubricant tank () being arranged between the two gear lines ().

Accessory gearbox

An accessory relay for a turbine engine, including a housing in which at least one gear wheel is installed for mechanically driving an accessory mounted on the housing, the gear of the wheel being driven via an input shaft supplying torque required for the mechanical drive, the shaft of the wheel being supported by at least two ball or roller bearings, and passing through at least one of the walls of the housing via an opening positioned opposite the accessory and closed by a first accessory cover attached onto the housing, wherein, for at least one of the gear wheels, the shaft thereof passes through two walls of the housing via openings closed by covers attached onto the housing, and the outer races of the two bearings are supported by the covers.

Growing community of inventors

Argenteuil, France

Julien Viel