Patent ID: 8083212
Filing Date: 2011-12-27
Classification: B66C,F03D,F05B,Y02E,Y02P,Y10T

Abstract:
1. A wind-turbine rotor-blade hoisting apparatus comprising: a sheave that guides a hoisting wire from a rotor head, to which a wind-turbine rotor blade is to be attached, toward the wind-turbine rotor blade and that is arranged so as to be movable in a direction along a rotation axis of the rotor head; a retaining portion that retains an attaching end of the wind-turbine rotor blade such that a line connecting the center of gravity of the wind-turbine rotor blade and a connecting portion, to which the hoisting wire is connected, crosses a longitudinal axis of the wind-turbine rotor blade; and a winch that is disposed in the rotor head, in a nacelle to which the rotor head is attached, or on the ground and that draws the hoisting wire to wind up or let out the retaining portion, wherein the retaining portion includes an inclined portion that is inclined toward the attaching end and extends from the connecting portion disposed radially outside of the wind-turbine rotor blade toward the wind-turbine rotor blade, and a retaining sling that extends from the connecting portion and is wound around the outer peripheral surface of the wind-turbine rotor blade, wherein the retaining portion supports the wind-turbine rotor blade at a fixed point between the inclined portion and the wind-turbine rotor blade, and at a contact point between the retaining sling and the wind-turbine rotor blade arranged with an interval in a longitudinal direction of the wind-turbine rotor blade.