Pitch system for a wind turbine

摘要

A pitch system (20) for rotating a blade (4) of a wind turbine relative to a hub (6) generally comprises a bearing (22) having an inner bearing ring (30) configured to be mounted to the hub and an outer bearing ring (32) configured to be mounted to the blade. A first coupling member (24) positioned between the hub and inner bearing ring extends radially inward. A second coupling member (26) positioned between the blade and outer bearing ring extends radially inward and over the inner bearing ring. A drive system (28) includes a first drive member (34) coupled to the first coupling member and a first driven member (36) 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.

主权项

1. A pitch system for rotating a blade of a wind turbine relative to a hub, the pitch system comprising:
a bearing including an inner bearing ring configured to be mounted to the hub and an outer bearing ring configured to be mounted to the blade, the outer bearing ring being rotatable relative to the inner bearing ring to pitch the blade relative to the hub; a first coupling member configured to be positioned between the hub and inner bearing ring and extend radially inward of the hub; a second coupling member configured to be positioned between the blade and outer bearing ring, the second coupling member extending radially inward and over the inner bearing ring; and a drive system having 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 being configured to move the first driven member to rotate the outer bearing ring relative to the inner bearing ring, wherein the first drive member comprises a hydraulic cylinder and the first driven member comprises a piston rod coupled to the first drive member.