Pitch change mechanism comprising an improved electrohydraulic actuator

A pitch change mechanism for a propeller of a turbomachine, the pitch change mechanism comprising an electrohydraulic actuator comprising:

• an electric machine configured to be fixedly mounted on a stator part of the turbomachine and comprising an actuating shaft rotationally movable about an axis of rotation;
• an axial-piston hydraulic pump suitable for pressurizing a hydraulic fluid, the hydraulic pump comprising:
• a body configured to be driven by the propeller;
• a barrel housing a set of pistons circumferentially distributed around the axis of rotation, each piston comprising a sliding pad;
• and
• a plate inclined with respect to the axis of rotation, each sliding pad bearing on the plate;
• one element from among the inclined plate and the barrel being configured to be fixedly connected to the stator part of the turbomachine so that rotation of the one element is prevented about the actuating axis and another element from among the inclined plate and the barrel being rotationally secured to the actuating shaft.