变转速风电行星齿轮传动系统动力学特性

Dynamic characteristic of planetary gear transmission system of wind turbine under time-varying speed conditions

针对风力发电机变转速工况,采用集中质量参数法建立了变速风电行星齿轮传动系统的动力学模型,通过傅里叶级数将时变啮合刚度转化为啮合频率的函数形式,根据仿真的线性升速曲线,分析了变转速对齿轮副时变啮合刚度的影响,并利用龙格库塔法求得了传动系统中各齿轮的动态响应.在此基础上,对风电齿轮箱试验台升速过程测试信号进行分析,验证了所建变转速风电行星齿轮传动系统动力学模型的有效性.

Considering the time-varying speed working conditions,the dynamic model was established by lumped-parameter method of planetary gear transmission system.The time-varying meshing stiffness was transformed into the function of meshing frequency by Fourier series.According to the simulation curve of rotation speed,the effect of variable speed on the time-varying meshing stiffness of gear pair was analyzed.The method of Runge-Kutta was applied to calculate the dynamic response of gears in transmission system.The experiment signal was analyzed based on the wind turbine gear box test bed,and the established dynamic model of wind turbine planetary gear under time-varying speed was verified.