Patent ID: 8966753
Filing Date: 2015-03-03
Classification: B66C,F03D,F05B,Y02E,Y02P,Y10T

Abstract:
1. A method for mounting a wind turbine blade to a wind turbine hub, comprising: providing a crane boom and a winch arrangement located at the bottom of the crane boom; arranging a wind turbine blade in a lifting device, which is attached to a bearing wire and to a plurality of control wires; the control wires further attached to the winch arrangement; keeping an orientation of the wind turbine blade substantially horizontal when the wind turbine blade is lifted off a ground and mounted to the wind turbine hub, the keeping the orientation includes adjusting the plurality of control wires via the winch arrangement; lifting the wind turbine blade, the bearing wire bears the weight of the wing turbine blade in the lifting device during lifting; and fixing the wind turbine blade in the substantially horizontal position to the wind turbine hub, wherein each control wire is threaded through a pulley that is vertically located between the winch arrangement and a vertical location of the lifting device during the fixing step, and wherein each control wire exerts a tensioning force at an angle to a lifting force exerted by the bearing wire.