考虑复合故障和撞击力的滚动轴承动力学建模研究

Research on Dynamics Modeling of Rolling Bearing Considering Compound Fault and Impact Force

滚动轴承是一种广泛应用于机械领域的零部件,动力学建模对提高滚动轴承性能具有重要意义。对由于滚动体与故障边缘接触而产生的撞击力激励函数进行推导,随着故障宽度及转速的增大,撞击力不断增大。建立一种考虑内外圈复合故障、撞击力激励函数、滚动体随机滑动因素的四自由度滚动轴承动力学模型,采用数值计算方法对动力学模型进行仿真求解。通过试验得到不同转速下滚动轴承的振动响应,验证动力学模型的正确性。

the rolling bearing is a component widely used in the field of machinery,and dynamic modeling is of great significance to improve the performance of rolling bearing.The excitation function of the impact force generated by the contact between the rolling element and the fault edge was derived,and the impact force increased with the increase of fault width and speed.A four degree of freedom dynamic model of rolling bearing considering the composite fault of the inner and outer rings,the excitation function of the impact force,and the random sliding factor of the rolling element was established,and the dynamic model was simulated and solved by numerical calculation method.The vibration response of the rolling bearing at different speeds was obtained through the test,and the correctness of the dynamic model was verified.