Patent ID: 9022739
Filing Date: 2015-05-05
Classification: B66C,F03D,F05B,Y02E

Abstract:
1. A wind turbine, comprising: a rotor configured to generate bending moments; a tower; a nacelle supported by the tower, wherein the nacelle comprises a foundation that supports components of the nacelle and receives the bending moments; a yawing system disposed beneath the foundation and comprising a yaw bearing enabling rotation of the nacelle relative to the tower, wherein the yaw bearing is configured to transfer the bending moments from the foundation to the tower; a lifting medium connected to a lifting device at a first end of the lifting medium and connectable to an item at a second end of the lifting medium; the lifting device located internally in a portion of the wind turbine and capable of moving the second end of the lifting medium and the item connected to the second end of the lifting medium, wherein the portion of the wind turbine comprises at least one of: the tower, the nacelle, and the yawing system; and a support supporting the lifting device and attached to at least one of the yawing system, the nacelle, and the tower, wherein the lifting device is moveable from a first position to a second position, and at least one of the first position and the second position is disposed between a lowermost elevation of the foundation and an uppermost elevation of the tower.