| 摘要 |
<p>A system for a wind turbine rotor blade comprising a pitch system comprising a bearing attached to a wind turbine hub and arranged to be attachable to a wind turbine rotor blade. Two or more pitch gears, preferably ring gears, are coupled to the bearing, the pitch gears being separated along the axis of rotation of the bearing. An actuator, such as an electric or hydraulic motor, is arranged to exert a torque on the two or more pitch gears via one or more pinions coupled to the actuator for causing rotation of a rotor blade with the bearing. Having two or more pitch gears engaging with a common pinion, or each engaged with separate pinions, to rotate the bearing may reduce the weight of the pitch gear, since two gears separated along the axis of rotation of the bearing can be made lighter than a single ring gear whilst covering the same length along the bearing axis.</p> |
