Actuator for the rotation of adjustable blades of a turbine

摘要

Drive unit (21) comprises an adjusting ring (26) which slides along a central axis of a blade support (22) to rotate the blades about their longitudinal axes (23). An independent claim is also included for a turbo-machine containing the drive unit. Preferred Features: An annular groove is provided in the inner peripheral surface of the adjusting ring. An adjusting drive is supported on the bearing housing of a rotor of the turbo-machine or on the support blade of the machine.