Mhi Vestas Offshore Wind A/s

Vestas Offshore Wind A/s

Kim Christensen

Mark Ursell-Smith

Morten Frost Hansen

Peter Nordlyng

Ken Nakayama

The present invention relates to an assembly of two structural parts of a wind turbine wherein the structural parts are to be connected in a flange-to-flange connection by a number of bolts and such that a flange of the first structural part and a flange of the second are centrally and rotationally aligned whereby a first borehole in the flange of the first structural part is matched and aligned with a corresponding first borehole in the flange of the second structural part. The structural parts may for example be a tower section or a foundation section. The assembly further comprises a first and a second rotational guide member releasably attached to each of the flanges of the structural parts. Each of the rotational guide members comprises a U-shaped or L-shaped structure of a first leg portion and a second leg portion connected by a central portion, the first leg portion ending in a positioning portion shaped to be inserted into a borehole of the flange, and the second leg portion comprising a stop member, and for at least one of the rotational guide members the structure comprised in the rotational guide member is U-shaped. The stop member of the first rotational guide member is configured for abutment to the second leg portion of the second rotational guide member when the flanges of the first and second structural parts are centrally and rotationally aligned. The invention further relates to a method of positioning and connecting two structural parts of a wind turbine as described above. The method includes first centrally aligning the structural parts with the flanges face-to-face and then rotating the structural part relative to each other until the rotational guide members come into contact with each other.

Method and assembly for aligning wind turbine structural parts

An offshore wind turbine generator comprises a towerand a platform. The toweris provided with a side dooraccessed from the platformusing a stairwayleading to an upper platform. The upper platformis formed from the upper surface of a cabinetwhich houses a diesel backup generator. Both the backup generator and the cabinetare mounted to the towerby bolts, such that the cabinet and backup generator are fully supported by the tower. A diesel fuel tankis also mounted to the towerby bolts. The fuel tank supplies diesel fuel to the backup generator.

Wind turbine generator assemblies

A power pack [] is located within a housing [] on the platform [] of a wind turbine generator tower. The power pack [] is supplied from a fuel tank []. With the door [] of the housing [] open, the power pack [] may be removed for servicing and repair by using a U-shaped support structure [] to which an electric motor [] is mounted. Two support rails [] permanently located within the housing [] support the housed power pack []. A chain [] attached to the power pack [] is driven by the motor [] to remove the power pack [] from the housing [] by sliding the power pack []along the support structure []. A pulley arrangement reduces the necessary torque. After removing the power pack [] from the housing [], a crane [] is used to lift the power pack [] from the platform [] and to lower it down to a sea vessel []. The crane [] may also be used in the refilling of the fuel tank [] by hauling a fuel line [] from a sea vessel up to the platform [] and connecting it to the fuel tank [

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Randers NV, Denmark

Kim Christensen