A hoisting system for the installation of a wind turbine wherein said hoisting system comprises measures to achieve a load bearing connection to the tower of the wind turbine and comprises measures to move the hoisting system up and down along the tower wherein the hoisting system, when it is fixed to an already installed part of the wind turbine tower with said load bearing connection, is arranged to install or remove any of a tower segment, a nacelle, a generator, a hub, and a blade in one or more combined hoists or in a single hoist.

A wind turbine (1) comprising a tower (2) and a nacelle (3) mounted on the tower (2) is disclosed. A movable container (39) is mounted on a lower part of the nacelle (3) or suspended below the nacelle (3), the movable container (39) housing a hoisting mechanism for hoisting and/or lowering the movable container (39) and for hoisting and/or lowering wind turbine components (9, 10, 11).

A device for removal and installation of a pitch bearing on a wind turbine having a plurality of blades is provided, comprising a platform having a frame, wherein the platform includes a first bearing attachment member on a first side of the frame, and having a first pair of opposing bearing connectors matably engageable to the pitch bearing; a second bearing attachment member on a second side of the frame, and having a second pair of opposing bearing connectors matably engageable to the pitch bearing; and a rigging member attached to the frame, wherein the rigging member includes at least one cable bracket adapted to receive a lifting cable. A method of removal and installing a pitch bearing using the platform is also provided.

In a first aspect, a method of lowering a wind turbine blade assembly comprising a wind turbine blade and a pitch bearing from a wind turbine hub is provided. The method of lowering a wind turbine blade assembly comprises positioning the wind turbine blade in a substantially horizontal position, holding the wind turbine blade in the substantially horizontal position with a crane, removing the blade assembly from the hub and lowering the blade assembly with the crane. In a further aspect, a method of disassembling a pitch bearing from a wind turbine hub using a tool having a socket wrench is provided. In yet a further aspect, tool for connecting or disconnecting a wind turbine blade assembly to or from a hub of a wind turbine is provided.

The present disclosure is directed to a lift system for a rotor blade of a wind turbine. The lift system includes a lifting device having at least one cradle. The cradle has a profile that corresponds to at least one of the exterior surfaces of the rotor blade so as to support at least a portion of the rotor blade. Further, the lift system includes a positioning assembly having at least one distance sensor mounted to the hub and at least one visual sensor mounted to the lifting device. Thus, the distance sensor is configured to identify a distance from the hub to the lifting device and the visual sensor is configured to identify a position of the rotor blade in the cradle.

A repair system for a gearbox of a wind turbine includes for removably coupling to the first portion of the gearbox housing of the gearbox. The lifting apparatus is adapted for lifting the first portion of the gearbox housing relative to the second portion gearbox housing. The repair system also includes at least one gearbox housing support member for mounting to the second portion of the gearbox housing. The at least one gearbox housing support member provides a support surface for the first portion of the gearbox housing during a repair procedure of the gearbox. The support surface is offset from the second portion of the gearbox housing.

The present invention relates to a system and method for cutting and manipulating the used wind turbine blades for disposal. The system includes but is not limited to a primary drive, a secondary drive, a protective hood and flipper arm for manipulating the blade during cutting.

The present invention relates to a system and method for cutting and manipulating the used wind turbine blades for disposal.

A method and a lifting arrangement for mounting a blade on a wind turbine rotor carried by a wind turbine structure. The method comprises providing a control line guide at the wind turbine structure, the control line guide forming a control line point configured to restrain the control line attaching the control line to the control line point; lifting the blade with an external blade lifting crane while a root end of the blade is guided towards the rotor by use of said control line restrained at said control line point, and connecting said blade to said rotor.

A method for mounting a blade root of a blade on a blade flange of a wind turbine rotor, the method comprising:attaching a control line between a hold structure at the blade flange and the blade root;lifting the blade with a blade lifting crane while the blade root is guided towards the blade flange by use of said control line, andconnecting said blade root to said blade flange.