A method for assembling a rotor bearing arrangement of a wind turbine, includes the method steps: providing a rotor shaft; providing a bearing block; providing individual slide bearing pads; inserting the slide bearing pads in the bearing block; and joining the rotor shaft and the bearing block fitted with the slide bearing pads.

A segmented wind turbine rotor blade includes sleeve-shaped pressure pieces arranged between rotor blade segments, each of which is mounted on a connecting bolt. Each pressure piece includes one or more cylindrical sections and a tool engaging section for an assembly tool). Each pressure piece is connected to a corresponding connecting bolt in a form fit manner, so that a screwing force can be applied to the corresponding connecting bolt via the assembly tool via the pressure piece. A diameter of the cylindrical section(s) is less than a diameter of the tool engaging section. Each two adjacent pressure pieces are arranged rotated by 180 relative to one another.

The lifting device is presented comprising a lifting yoke comprising fastening means connecting to a crane during operation, a support element comprising a support surface dimensioned to support an area of a unit to be lifted, connecting means securing the lifting yoke to the support element during operation, and at least a part of the support element comprises a transport frame corresponding to a lower frame of a container such as a standard container. The lifting device comprises a packed state and an operational state, and in the packed state the components of the lifting device are configured to fit within the dimensions of a container such as a standard container, and in the operational state the components of the lifting device are configured to operate as a lifting device.

The invention relates to a method of prolonging pitch bearing lifetime for a wind turbine as well as the pitch bearing itself. The method comprises the steps of: stopping the rotor (4) from rotating; removing a plurality of first fastening means used for mounting the blade (5) to the outer bearing ring (24); mounting a strengthening arc structure (10) on said outer bearing ring (24), opposite the blade (5); installing a plurality of second fastening means, thereby connecting said blade (5) and said strengthening arc structure (10) to said outer bearing ring (24).

In a method for installing a blade on a horizontal axis rotational hub of an offshore wind turbine, use is made of a blade installation device that is temporarily installed on the offshore wind turbine. The device includes a mounting part that is mounted on the foundation of the offshore wind turbine and/or on a lower portion of the wind turbine mast. A guide mast having a track is supported by the mounting part and extends parallel and adjacent to the wind turbine mast. A support bracket laterally supports the guide mast. The blade installation device further includes a blade manipulator assembly with a trolley that is movable along the track and a blade manipulator including blade engagement members. The blade manipulator is supported by the trolley via an actuating assembly including actuators. A positioning system controls the actuators.

A method of manufacturing a wind turbine blade (10) is provided, the method comprising the steps of providing a first shell half (38) and a second shell half (36), providing at least one shear web (50) having a web body (61) arranged between a first mounting flange (62) and an opposing second mounting flange (63), and providing a lifting assembly (65). The lifting assembly comprising at least one crane device (68), a lifting rail (69) suspended from the at least one crane device (68), and a plurality of lifting clamps (70, 72), each lifting clamp being connected to the lifting rail (69). The method further comprises the steps of attaching the lifting clamps (70, 72) to the shear web (50), lifting the shear web (50) with the lifting assembly (65), lowering the shear web (50) into the first shell half (38) with the lifting assembly (65), bonding the first mounting flange (62) of the shear web (50) to an inner surface (66) of the first shell half (38), detaching the lifting clamps (70, 72) from the shear web (50), bringing the first and second shell halves (38, 36) together, and bonding the second mounting flange (63) of the shear web to the second shell half (36).

In a method for installing a blade on a horizontal axis rotational hub of an offshore wind turbine, use is made of a blade installation device that is temporarily installed on the offshore wind turbine. The device includes a mounting part that is mounted on the foundation of the offshore wind turbine and/or on a lower portion of the wind turbine mast. A guide mast having a track is supported by the mounting part and extends parallel and adjacent to the wind turbine mast. A support bracket laterally supports the guide mast. The blade installation device further includes a blade manipulator assembly with a trolley that is movable along the track and a blade manipulator including blade engagement members. The blade manipulator is supported by the trolley via an actuating assembly including actuators. A positioning system controls the actuators.

A wind turbine blade handling tool includes at least one supporting segment for supporting a surface portion of an outer surface of the blade during handling of the wind turbine blade, wherein the supporting segment includes at least one deformable protection pad, which is deformable in such manner that at least one blade add-on element protruding from the supported surface portion is completely accommodated in the deformed protection pad.

The present disclosure relates to devices for wind turbine blades and methods for reducing vibrations in wind turbines. More particularly, the present disclosure relates to devices for mitigating vortex induced vibrations and stall induced vibrations, wind turbine blades comprising such devices, and methods for reducing wind turbine vibrations when the wind turbine is parked, especially during wind turbine installation and/or maintenance. A method for mitigating vibrations of a parked wind turbine comprises arranging a device in an inactive state with a wind turbine blade; and causing the device to transition to an active state in which the device grips the wind turbine blade more strongly than in the inactive state.

In the installation of a rotor blade in horizontal orientation to the hub of a horizontal axis offshore wind turbine, use is made of a blade motion synchronization and positioning device, which comprises a wind turbine coupler, a blade coupler, a motion arm between the wind turbine coupler and the blade coupler, and a controllable motion arm actuator assembly. The method includes bringing and maintaining the blade coupler in a motion compensated receiving position, wherein the arm is operated to compensate for sea state and/or wind induced tower top motion. In receiving position, the coupler is coupled to the blade that is suspended from a crane. The actuator assembly is then operated to gradually bring, and then maintain, the coupled blade in a horizontal motion that is synchronized with tower top motion, and to displace the coupled blade root into a pre-mounting position. Then a mounting motion is performed wherein the blade root is moved into a mounting position and the blade root is fastened to mounting structure by fasteners.