Patent ID: 9175667
Filing Date: 2015-11-03
Classification: F03D,F05B,F16B,Y02B,Y02E,Y10T

Abstract:
1. A fastening system comprising: a rotary shaft and a wind turbine pitch system of a three-blade variable pitch wind turbine, wherein said fastening system joins the rotary shaft and the wind turbine pitch system, said fastening system comprising a double flange formed by a front flange and a rear flange joined together, wherein the front flange is anchored to a pusher shaft of the pitch system which comprises a star-shaped part having arms that unite the blades of the wind turbine, a hollow rotary shaft goes through the rear flange, the hollow rotary shaft being frictionally engaged with the rear flange by a tapered collar on an inner part of the rear flange, both flanges, front and rear, are coupled together with at least three bushings wherein said at least three bushings are located between the arms of the star-shaped part and wherein the front and rear flanges sandwich the star-shaped part such that the front flange faces a front surface of the star-shaped part and the rear flange faces a rear surface of the star-shaped part.