随机风速下含磨损故障的齿轮系统动力学特性

Dynamic Characteristic of Gear System with Wear Fault Under Random Wind Speed

通过Archard磨损模型计算齿面磨损量,得到了时变啮合刚度,同时考虑齿侧间隙、综合传递误差和随机风速引起的外部激励等因素,建立了含磨损故障的风电机组高速级齿轮传动系统动力学模型,并使用Runge-Kutta法进行求解,分析了不同累计磨损量下风电机组高速级齿轮传动系统的动态特性。研究结果表明:Archard磨损模型符合实际齿轮磨损状态,在节线处磨损最小,在齿顶处的累计磨损量最大;振动位移的波动趋势与输入转矩趋势相反,随着磨损时间的增加,振动位移的波动程度增加;经过5年的磨合期之后,齿轮的主要响应频率的振幅呈线性变化。研究结果为齿轮传动系统的故障诊断与检测提供重要的理论依据。

The wear of tooth surface is calculated by Archard wear model,and the time-varying meshing stiffness is obtained.At the same time,considering the factors such as the tooth side clearance,the comprehensive transfer error and the external excitation caused by random wind speed,the dynamic model of high-speed level gear transmission system of wind turbine with wear fault is established.The vibration differential equation of gear transmission system is solved by Runge-Kutta method.The dynamic characteristics of the high-speed level gear transmission system of wind turbine under different accumulative wear are analyzed.The results show that the Archard wear model is consistent with the actual gear wear state.The wear is the least at the pitch line and the wear is greatest at the top of the tooth.The fluctuation trend of vibration displacement is opposite to that of input torque.With the increase of wear time,the fluctuation degree of vibration displacement increases.After 5 years of run-in,the amplitude of the main response frequency of the gear changes linearly.The research results provide an important theoretical basis for fault diagnosis and detection of the gear transmission system.