Vestas Wind Systems A/s

Gerry Madden

Anton Bech

Jesper Lykkegaard Neubauer

Peter Bøttcher

Ole Mølgaard Jeppesen

Leif Christoffersen

Robert Rowntree

A pitch system () for rotating a blade () of a wind turbine relative to a hub () generally comprises a bearing () having an inner bearing ring () configured to be mounted to the hub and an outer bearing ring () configured to be mounted to the blade. A first coupling member () positioned between the hub and inner bearing ring extends radially inward. A second coupling member () positioned between the blade and outer bearing ring extends radially inward and over the inner bearing ring. A drive system () includes a first drive member () coupled to the first coupling member and a first driven member () coupled to the second coupling member. The first drive member is configured to move the first driven member to rotate the outer bearing ring relative to the inner bearing ring and thereby pitch the blade.

Pitch system for a wind turbine

The invention relates to a wind turbine including at least two pitch controlled wind turbine blades. Each blade has pitch bearings including two or more bearing rings, and pitch controlling means for pitching the blades by means of the bearings. The blades are mounted on a hub via the pitch bearings and the pitch bearings include separate flexibility enhancing means for controlling loads in the bearings.

Wind turbine pitch bearing, and use hereof

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Leighton Buzzard, United Kingdom

Gerry Madden