A hoisting system includes an upper cable support system to be mounted on a top end of a wind turbine, a lower cable support system at a lower end of the wind turbine, and left and right cables extended between the cable support systems. A clamping yoke arranged approximately at the centre of gravity of a rotor blade includes left and right climbing systems adapted to climb on the cables with first and second rollers spaced in a longitudinal direction of the blade whereby the first rollers are nearer a root end of the blade than the second rollers. A position at least in the longitudinal direction of the blade of the first roller of at least one of the left and the right climbing systems is adjustable by an actuator.

Method for lifting a wind turbine component The present invention relates to a method for lifting a wind turbine component, such as a rotor blade (2), gearbox or a rotor, with a lifting yoke (10) comprising a first structural body (20) comprising a crane hook attachment point (21), a first connection point (22) and a second connection point (23), a second structural body (30) comprising a third connection point (31) and a fourth connection point (32). First and second tensional elements (24, 25) such as slings or wires, are connected to the connection points, the length of the second tensional element being variable. An inertial measurement unit (40) determines the angle of the second structural body to the horizontal and the angle of the second tensional element is determined by an angle sensor. The distance (D) from the fourth connection point to the intersection between an axis (V) extending vertically through the center of gravity of the wind turbine component and the lifting plane is determined and provided to a crane operator. The invention also concerns a corresponding yoke.

The present invention relates to an assembly for rotating a suspended load around a substantially vertical axis, the assembly comprising an inner rim configured to have a fixed relationship with the suspended load to be rotated, an outer rim engaging the inner rim in a manner so that the inner and outer rims are configured to perform rotational movements relative to each other during rotation of the suspended load, and a drive unit for performing the relative rotational movement between the inner and outer rims. The assembly of the present invention may be secured to a lifting yoke for lifting wind turbine related components, such as entire wind turbine towers, wind turbine tower sections, nacelles, rotor blades or containers.

Described herein is a device for upending a tubular element with a longitudinal direction from a support surface at an outer end. The device has a support beam which runs substantially parallel to the support surface and is connected to the support surface at a support point. The support beam guides a coupling tool to which a wall part of an outer end of the tubular element can be coupled. The coupling tool is displaceable relative to the support surface with the support beam, from a clear position to a coupled position in which the tubular element outer end is engaged by the coupling tool. Also described herein, in addition to the device, is a method which makes use of the device.

A device for mounting wind turbine components and mounting method using the device is disclosed. The device is used to lift the components, such as the segments (1) forming the tower and the nacelle (2) of a wind turbine, these components are mounted to the structure of the wind turbine, the device having a lower portion (3) and an upper portion (4) coupled by a swivel joint (5), the lower portion (3) associated with a telescopic assembly (6) fastening to the segments (1) of the already-mounted tower portion of the wind turbine, while a lift (10) is movable along the whole of both portions (3) and (4), securing the components (1, 2) of the wind turbine to be mounted, to lift these components (1, 2) of the wind turbine to be mounted to the mounting positions thereof, in movements from the lower portion of the tower.

Described is a method for taking up an elongate object from a ground surface using a hoisting yoke coupled to a lifting means. A beam-like support frame of the hoisting yoke extends in a longitudinal direction of the object and slings provided at end parts of the support frame take up the object. The object is taken up in a sling by holding a first outer end of a sling with a first holding means provided at an end part of the support frame and letting it hang down from the first holding means to a position in the vicinity of the object; paying out a messenger line from the end part using a messenger line winch, feeding it under the object and coupling it to a second outer end of the sling hanging from the first holding means; taking in the messenger line so that the sling is carried under the object and to the relevant end part; and coupling the second outer end of the sling to a second holding means provided at the end part, thus forming one of the slings for the object.

A gearbox repair assembly is disclosed herein. The gearbox repair assembly includes a sleeve having an inner diameter configured to receive a bearing assembly and an outer diameter configured to fit within a bore of a gearbox housing. The gearbox housing can be part of a gearbox of a wind turbine. The gearbox repair assembly further includes a retaining plate configured to be attached to the gearbox housing for preventing an outer race of the bearing assembly from rotating in the bore relative to the gearbox housing. Also provided are methods to repair such a gearbox. The gearbox repair assembly and related methods reduce the time and cost needed to repair the gearboxes.

A tower section and a wind generating set. The tower section comprises a tower section body and hoisting lugs, wherein through holes are provided in the sidewall of the tower section body, and an inner cavity of the tower section is communicated with the outside by means of the through holes; the hoisting lugs are provided in the through holes, are movable along central lines of the through holes, and can move between a first position where the hoisting lugs extend out of the tower section body and a second position where the hoisting lugs are retracted to the tower section body, so as to hoist the tower section. Because the hoisting lugs can selectively extend out, a tower hoist is not needed to be connected to a flange in a tower section hoisting process, and the hoist is mounted on the hoisting lugs.

The invention relates to a spreader bar (1) for distributing a lifting force from a crane (2) onto a two lifting regions (3,4) f a load (5) to be lifted. The spreader bar comprises a frame (6) and first and second systems (7,8). Each system comprises a lifting pulley (9), a connector (10) for connecting the spreader bar to the respective lifting region via a main wire (11) guided by the lifting pulley, an actuator (15) for vertically moving the connector via an actuator wire (16), and a movably arranged suspension element (19) connecting the actuator wire and the main wire. A compensator (20) compensates for possible fluctuations in the vertical distance between the respective lifting region of the load and the spreader bar. Such fluctuations can be due to the crane or the load being located on a floating vessel. When the suspension element is engaged with a blocking element (23), the lifting force from the crane can be transferred to the main wire in order to lift the load.

To upend and lift an object, e.g. a foundation member of an offshore wind turbine, e.g. a monopole, use is made of an upending and lifting tool, wherein, with the tool suspended from one or more hoisting cables, e.g. from a crane hook of a crane, and with the frame of the tool initially in vertical orientation, a routine is performed which includes operating one or more shifting actuators, thereby moving a cable shifting member and engaging a cable engagement surface with the one or more hoisting cables at a height above a pivot axis. Further continuing this motion of the cable shifting member and thereby applying a cable shifting force on the one or more hoisting cables results, in reaction, in a pivoting of the frame into the horizontal orientation thereof.