Patent ID: 8246308

Claim:
A turning device for a wind turbine rotor, configured to turn the wind turbine rotor to an arbitrary position, the turning device comprising: a driven-side friction pulley configured to rotate together with an output shaft of the wind turbine rotor; a motor-side friction pulley configured to be movable between an engagement position where the motor-side friction pulley frictionally engages with an outer circumferential surface of the driven-side friction pulley and a free position where the motor-side friction pulley is not frictionally engaged with the outer circumferential surface of the driven-side friction pulley; a pulley pressing mechanism configured to move the motor-side friction pulley from the free position to the engagement position by manual power of an operator and to frictionally engage the motor-side friction pulley with the outer circumferential surface of the driven-side friction pulley; and pulley driving means for rotationally driving the motor-side friction pulley.