风力发电站变桨轴承断裂分析

Fracture analysis of pitch bearing in wind power station

变桨轴承是风力发电的关键部件,通过变桨驱动电机带动变桨轴承转动从而改变叶片的迎风角,使叶片保持最佳的迎风状态,从而控制叶片的升力,从而达到控制叶片上的扭矩和功率的目的。变桨轴承在风电发电机组故障中故障率最高,运行过程中故障清除的成本高。通过超声波检测、解剖、宏观检查、样品金相分析、化学元素分析、缺陷电镜扫描等手段分析了一批变桨轴承断裂的原因。

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.