Safran Transmission Systems

Hispano Suiza

Boris Morelli

Guillaume Julien Beck

Stéphane Prunera-Usach

Jordane Peltier

Benjamin Feraud

Julien Viel

Antoine Mathieu

Maxime Amiet

Maxence Guillemont

Lionel Bauduin

Samuel Raymond Germain Becquerelle

Aldric Renaud Gabriel Marie Moreau De Lizoreux

Pauline Marie Cécile Autran

Jean Clayette

Samuel Thiberge

A reduction gear including an input shaft including an input gear, an output shaft including an output gear, and two intermediate transmission lines, each intermediate transmission line including an intermediate shaft including a first stage of teeth and a second stage of teeth, the stages rotating as one, and an additional gear for meshing respectively with the first stage of teeth and the input gear, or with the second stage of teeth and the output gear, and the reduction gear wherein the input gear or the output gear meshing with the additional gears is axially offset with respect to the stage of teeth of the intermediate shafts meshing with the additional gears.

Reduction gear with input/output rotation reversal

A method for aligning toothing in an assembly of two half-ring gears is provided:

Ring gear for an epicyclic reduction gear

Speed reduction gear comprising two intermediate transmission lines, in particular for a turbine engine, comprising an input line () and an output line that is driven by the input line via said intermediate transmission lines, said intermediate transmission lines being substantially parallel, characterized in that said reduction gear comprises means for distributing loads between said intermediate lines, said load distribution means comprising swiveling coupling means () for rotatably coupling one end of the input line, and oil-damping means () for damping radial movements of an opposite end of the input line.

Speed reduction gear comprising two intermediate transmission lines

A device lubricates elements of an accessory drive system of an aircraft. The device includes a pinion having a pinion shank that is hollow and that has an axis of rotation, a shaft arranged inside the pinion shank and extending along the axis of rotation, a space between the shaft and the pinion shank allowing displacement of oil, an oil reservoir arranged facing the space, at a first end of the pinion shank, and an oil outlet duct arranged facing the space, at a second end of the pinion shank. The pinion shank and the shaft together form a pump and cooperate to drive the oil from the reservoir toward the oil outlet duct thanks to the rotation of the pinion shank around the shaft.

Integration of a pump on a pinion shank

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

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

The invention relates to an accessory gearbox () for a turbomachine, said gearbox being equipped with an air/oil separator () and comprising a casing () in which intermeshing pinions are mounted, one () of which is solidly connected to a coaxial shank () for driving at least one membrane filter () of the separator, characterized in that the membrane filter is mounted directly on a web of the pinion () inside the casing.

Turbomachine accessory gearbox equipped with an air/oil separator

An epicyclic reduction gear, for example for a turbomachine, including a device forming a fluid circulation passage configured to generate a pressure drop, created by stacking at least two elements. Each element includes a passage for carrying fluid configured to generate a pressure drop and including an inlet and an outlet. The outlet, or inlet, of the passage of one of the elements is, respectively, connected to the inlet, or to the outlet, of the passage of the other element.

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Paris, France

Boris Morelli