Method for manufacturing a propeller reduction gear
AssigneeSafran Transmission Systems
InventorsAntoine Mathieu, Benjamin Feraud
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a propeller reduction gear, which includes measuring manufacturing defects of the casing; calculating a first angular play induced at each intermediate gear by the measured manufacturing defects; estimating a second angular play induced at each intermediate gear by deformations of the casing when the reduction gear transmits a threshold torque; calculating a total angular play from the first angular play and the second angular play; and selecting two intermediate gears with a phase difference that compensates for the total angular play.
Claims4
A method for manufacturing a propeller reduction gear including:
- a casing including at least two front bearing seatings and two rear bearing seatings;
- an input gear;
- at least two intermediate gears, each intermediate gear including a first stage meshing with the input gear and a second stage, each intermediate gear being attached to the casing via at least one front bearing and one rear bearing, each front bearing being supported by one of the at least two front bearing seatings, each rear bearing being supported by one of the at least two rear bearing seatings;
- an output gear wheel meshing with the second stage of each of the at least two intermediate gears;
- the method comprising:
- (a) measuring manufacturing defects of the casing;
- (b) calculating a first angular play induced at each intermediate gear from the measured manufacturing defects;
- (c) estimating a second angular play induced at each intermediate gear by deformations of the casing upon transmitting a threshold torque by the reduction gear;
- (d) calculating a total angular play from the first angular play and the second angular play;
- (e) selecting two intermediate gears having a phasing difference compensating for the total angular play;
- and
- (f) manufacturing the propeller reduction gear using the selected two intermediate gears.
Dependencies are inferred from the claim text.