Patent ID: 11933268
Assignee: NORDEX ENERGY SPAIN, S.A.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method to extend the life cycle of a wind turbine comprising a tower, a nacelle comprising a nacelle frame, and a yaw bearing comprising at least a geared ring for providing a rotatable connection between the nacelle and the tower around a yaw axis and at least one gear motor of a yaw drive for providing the rotatable connection between the nacelle and the tower around the yaw axis, the method comprising:
a) disengaging the rotatable connection between the nacelle and the tower;
b) lifting the nacelle from the tower using lifting means, allowing the rotation of the geared ring with respect to a component to which the geared ring is connectable while maintaining and powering in contact the geared ring and the at least one gear motor throughout the lifting, wherein the component to which the geared ring is connectable is either the nacelle or the tower; and
c) rotating the geared ring around the yaw axis while the rotatable connection between the nacelle and the tower is disengaged, until the geared ring reaches a predetermined position with respect to the component to which the geared ring is connectable.