Wind turbine blade pitch adjustment system

Details Wind turbine blade pitch adjustment system Wind turbine blade pitch adjustment system

F - Mech Eng,Light,Heat,Weapons

03

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170/22

F03D 7/04 (2006.01) F03D 7/02 (2006.01)

Patent

CA 1146079

WIND TURBINE BLADE PITCH ADJUSTMENT SYSTEM Abstract A lightweight system for adjusting the pitch of a plurality of variable pitch wind turbine blades. The sys- tem comprises, a rotatable hub on which the blades are mounted, an individual hydraulic actuator mounted on the hub and connected to each blade for setting the blade at a preselected pitch and an electrical feedback device pro- viding a controller with a signal indicative of the actual pitch setting of the blades. The actuators are provided with hydraulic fluid by means of a transfer bearing while the feedback device is electrically connected to the con- troller through slip rings rotatable with the hub. By this system, the requirement of relatively heavy mechanical interconnections between the actuators and blades are eliminated, and the blades are individually adjustable with regard to the pitch thereof, whereby the pitch set- ting of the various blades may simultaneously differ as called for by the controller.

371573

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