US 12,601,272 B2Granted

Pitch change mechanism with an actuator surrounding a fluid transfer bearing

AssigneeSafran Aircraft Engines

InventorsChristophe Marcel Lucien Perdrigeon, Clément Cottet, Jean Charles Olivier Roda, Régis Eugène Henri Servant

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Abstract

The invention relates to a pitch change mechanism (70) comprising a frame (72), an actuating cylinder (74) having a moving part (102) capable of translating relative to the frame (72), and a linkage system (78) connecting the moving part (102) to a variable-pitch vane (56) so as to convert the translation of the moving part (102) into a rotation of the variable-pitch vane (56). It further comprises a fluid transfer bearing (257) for supplying the actuating cylinder (74) with actuating fluid from a source (76) relative to which the actuating cylinder (74) is capable of rotating. The actuating cylinder (74) extends at least partly around the fluid transfer bearing (257).

Claims16

Dependent claims

A pitch change mechanism for adjusting an angular position of at least one variable-setting blade around a pivot axis of the variable-setting blade, said pitch change mechanism comprising:

a frame which is fixed in relation to the pivot axis,
a control actuator including a fixed part secured to the frame and a movable part, translationally movable along a longitudinal axis in relation to the fixed part,
a linking system linking the movable part to the variable-setting blade so as to convert a translation of the movable part in relation to the fixed part along the longitudinal axis into a rotation of the variable-setting blade about the pivot axis, and
a fluid transfer bearing for supplying the control actuator with actuating fluid coming from a source in relation to which the control actuator is rotationally movable about the longitudinal axis,
wherein the control actuator extends at least partially around the fluid transfer bearing.

2 more elements

Dependencies are inferred from the claim text.