Electromechanical pitch actuation system, 22, for turbo-machine propeller blades, comprising an actuator, 24. The system includes a transmission screw, 26, which has two degrees of freedom, rotation and translation, and a nut, 28, through which said transmission screw passes and which cooperates with the screw and is translated along the axis (A) by the rotation of the screw. The system further includes a means for decoupling the rotation of the propeller and said nut, which is rotationally fixed. A first blade pitch control means, which comprises at least one electric motor, 40a, 40b, sets a component into rotation through a planet reduction gear, 42, with a view to modifying the position of the transmission screw in one of its degrees of freedom. A second blade feathering means configured to act on the transmission screw with a view to modifying the pitch of the blades if the first means are inactive is also included, as well as a feature that said first planet reduction gear comprises a ring gear rigidly connected to said first component, a planet shaft rigidly connected to said first rotor and a planet carrier rigidly connected to said first housing.


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    Title :

    Electromechanical pitch actuation system for a turbomachine propeller


    Contributors:

    Publication date :

    2022-03-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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