Fan rotor with actuator with locking device

A fan rotor for a turbomachine, the fan rotor comprising:

• a hub;
• a plurality of variable-setting blades each pivotable relative to the hub about a respective pivot axis;
• and
• an actuator that adjusts an angular position of each of the plurality of variable-setting blades about the respective pivot axis
• wherein the actuator comprises:
• a control jack including a fixed part fixed relative to the respective pivot axis and a movable part movable in translation along a longitudinal axis relative to the fixed part, the fixed part and the movable part delimiting therebetween two fluid chambers arranged such that an increase of fluid pressure in one of the two fluid chambers relative to a fluid pressure in the other of the two fluid chambers causes the movable part to move relative to the fixed part,
• a connection system connecting the movable part to the variable-setting blade so as to convert the translation of the movable part along the longitudinal axis into a rotation of the variable-setting blade about the respective pivot axis, and
• a locking device configured to block the translation of the movable part relative to the fixed part in at least one direction,
• wherein the locking device comprises:
• a surface secured to the fixed part or movable together with the movable part relative to the fixed part, the surface being notched with a plurality of notches each extending orthogonally to the longitudinal axis,
• a blocking member having an unlocking configuration away from the surface and a locking configuration meshed with the surface so that the movable part is immobilized in translation relative to the fixed part, in which the blocking member is engaged in at least one of said plurality of notches,
• a movable member movable in translation relative to the blocking member between a retracted position in which it the movable member leaves the blocking member free to be in the unlocking configuration and a deployed position in which the movable member forces the blocking member into the locking configuration,
• a biasing member that biases the movable member towards the deployed position, and
• a holding device that holds the movable member in the retracted position under certain predetermined conditions, the predetermined conditions consisting of a supply pressure to the fluid chambers being above a threshold.