Pitch variation control device for the blades of a turbomachine rotor and method of operating the device
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United States of America Patent
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Jan 21, 1997
Issued Date -
N/A
app pub date -
Apr 4, 1996
filing date -
Nov 10, 1993
priority date (Note) -
Expired
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Abstract
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.
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