Abstract：The pitch bearing is a key component of wind power generation. The pitch drive motor drives the pitch bearing to rotate to change the windward angle of the blade, so that the blade maintains the best windward state, so as to control the lift of the blade, so as to achieve the control of the blade on the blade. purpose of torque and power. Pitch bearings have the highest failure rate in wind turbine generator failures, and the cost of fault removal during operation is high. In this paper, the reasons for the fracture of a batch of pitch bearings are analyzed by means of ultrasonic testing, dissection, macroscopic inspection, sample metallographic analysis, chemical element analysis, and defect electron microscope scanning.
2022, Vol. 29 