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A device for controlling the pitch of the blades of a turbomachine rotor includes an electric motor having a stator which is stationary and a rotor, preferably of the permanent magnet or asynchronous kind, which is mounted on the turbomachine shaft and is rigidly secured to a toothed wheel meshing w

A device for controlling the pitch of the blades of a turbomachine rotor includes an electric motor having a stator which is stationary and a rotor, preferably of the permanent magnet or asynchronous kind, which is mounted on the turbomachine shaft and is rigidly secured to a toothed wheel meshing with pinion sectors rigidly secured to the roots of the blades, and a mechanism for locking the blade roots in position which includes an electromechanical actuator rigidly secured to the shaft and electrically powered by a rotary transformer.

대표청구항 ▼

A pitch variation control device for blades of a turbomachine having a rotor wherein said blades are mounted on a disc rotated by a shaft of the turbomachine and each of said blades has a longitudinal axis and a root by which said blade is pivotable about its longitudinal axis, said control device c

A pitch variation control device for blades of a turbomachine having a rotor wherein said blades are mounted on a disc rotated by a shaft of the turbomachine and each of said blades has a longitudinal axis and a root by which said blade is pivotable about its longitudinal axis, said control device comprising: actuating means for changing the pitch of said blades and locking means for locking said roots of said blades, said actuating means including an electric motor having a stationary stator winding and a rotor which is secured to said turbomachine shaft and has no electrical connection to the stator, a toothed wheel which is rigidly secured to said rotor of said electric motor, and pinion sectors rigidly secured to said roots of said blades and meshing with said toothed wheel, said locking means including an electromechanical actuator which is rigidly secured to said turbomachine shaft, and a rotary transformer electrically powering said actuator.