A pitch actuation system (22') for a turbomachine propeller (10), comprising an actuator (24) with a movable portion (26) configured to be connected to blades (14) of the propeller in order to rotate them relative to the blade-pitch setting axes (B), characterised in that the actuator is an electromechanical actuator and comprises: blade-pitch control means having a transmission screw (26) rotated about an axis (A); a nut (28') through which said transmission screw passes; and a member (50) configured to engage with the blades in order to move the latter, wherein the nut is connected to the member via decoupling means (54, 56, 58) configured such that a translational movement of the nut causes a translational movement of the member, but a rotational movement of the member does not cause the rotational movement of the nut.
Pitch actuation system for a turbomachine propeller
2018-12-26
Patent
Elektronische Ressource
Englisch
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