风电机组齿轮箱行星轮裂纹故障仿真分析

Simulation Analysis on Crack Fault of Planetary Wheel of Wind Turbine Gearbox

受强交变载荷的影响,非直驱风力机齿轮箱极易发生故障,为此研究风电机组齿轮裂纹故障诊断新方法。理论分析了风电机组齿轮裂纹故障振动信号特征,建立了行星轮裂纹故障仿真研究模型,通过改变啮合刚度参数模拟齿轮裂纹故障。研究结果表明,当行星轮存在裂纹故障时,故障齿的啮合会对齿轮的振动产生调峰作用,振动信号具有啮频及谐波两侧会出现行星轮转频、故障特征频率及两者组合的调制边频带的特征。

Affected by strong alternating load, the gearbox of non-direct-driven wind turbine is easy to break down, there- fore, this paper aims to study a new method for diagnosis on crack fault of wheel gear of the wind turbine. It theoretically analyzes characteristics of crack fault vibration signals and establishes a simulation and research model for crack fault of the planetary wheel so as to simulate crack fault of the wheel gear by changing meshing stiffness parameters. Research results in- dicate that when there is crack fault in the planetary gear, meshing of the faulted gear will have peak regulating effect on vi- bration of the wheel gear. In addition, vibration signals have the characteristic that rotating frequency of the planetary wheel, faulted characteristic frequency and combined regulating sideband are all occurred at both sides of meshing frequency and harmonic of mesh frequency.