摘要
以高速电主轴的轴承为对象,根据Harris轴承运动理论和赫兹接触理论,考虑随转速提高引起轴承刚度下降以及"软化"的现象,建立轴向预紧力下的高速轴承-转子系统动力学模型,采用Newton-Raphson算法,对轴承钢球动力学方程进行求解。分析轴承在不同轴向预紧力下,轴承-转子系统动力学性能的变化。结果表明:随着轴承轴向预紧力的提高,轴承-转子系统的涡动频率上升,且轴上轴承组之间的距离越大,转子的涡动频率越高。
In this paper,a new high speed bearing-rotor system dynamic model is established,with the object of high speed spindle bearings,according to the Harris motion bearing theory and Hertz contact theory,considering bearing stiffness degradation and the softening phenomena by the speed increase.The Newton-Raphson algorithm is employed to solve the dynamic equation to obtain system responses with the effect of different axial preloads and speed.The results show that bearing stiffness and bearing-rotor system frequency will decrease when the speed of rotor increases.
出处
《机械工程与自动化》
2016年第5期10-12,共3页
Mechanical Engineering & Automation
基金
温州市科技计划项目(2014F008)
上海大学创新基金项目(理工类)(K.10-0109-13-007)
