Blade pitch control mechanism for wind generating set

Abstract

The invention discloses blade pitch control mechanism for a wind generating set. A shifting groove is arranged at the lower part of one end of three racks of the blade pitch control mechanism, a lever mechanism is provided with a connecting rod shaft, three levers and three supports, wherein the three supports are all evenly distributed on a wheel hub, the middle parts of the three levers are respectively connected with the three supports through hinges, the outer ends of the three levers are respectively positioned in the shifting grooves at the lower parts of the three racks, the outer end of the connecting rod shaft is connected with a piston rod of a hydraulic oil cylinder, a thread is arranged on a shaft head at the inner end of the connecting rod shaft, a shaft shoulder is arranged on the shaft body far from the shaft head, an inner radial-thrust ball bearing and an outer radial-thrust ball bearing are sleeved between the shaft shoulder and the shaft head, the inner ends of the spherical structures of the three levers are positioned between the inner radial-thrust ball bearing and the outer radial-thrust ball bearing, and the axial clearance among the inner ends of the three levers, the inner radial-thrust ball bearing and the outer radial-thrust ball bearing is eliminated by screwing a locking nut on the shaft head at the inner end of the connecting rod shaft. The invention has the advantages of long service life and simple structure.

Description

technical field [0001] The invention relates to a pitch adjustment mechanism of a wind power generating set. Background technique [0002] A wind turbine usually contains three blades that receive wind energy. In order to change the ability of the blades to receive wind energy, the windward angles of these three blades are usually adjusted by a pitch adjustment mechanism. The wind turbine pitch adjustment mechanism mainly includes three blade bearings, three large gears, a rack, a rack support, a lever mechanism, and a hydraulic cylinder. The three blades of the wind power generating set are uniformly arranged on the hub of the wind generating set through three blade bearings respectively. Three large gears are respectively arranged at the roots of the three blades. The three rack supports are evenly distributed on the inner wall of the wheel hub, and the three racks are respectively installed in the slide grooves of the three rack supports, and the lower part of one end o...

AI Technical Summary

Problems solved by technology

Since the inner ends of the three levers rotate in the grooves, the inner ends of the levers and the grooves are sliding friction, so the inner ends of the levers and the grooves are easy to wear, thus affecting the service life of the wind turbine pitch adjustment mechanism

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