【摘要】 考虑滚动轴承径向刚度随转速非线性变化,运用传递矩阵法对电主轴的临界转速和静刚度特性进行了系统的研究,用Matlab工具开发了一套具有自主知识产权的动态计算分析软件。以某款精密高速(51 000r/min)磨削用电主轴为对象,分析了主轴结构参数与砂轮参数对主轴动态特性的影响,并对主轴结构进行了优选设计。结果表明,基于传递矩阵法编制的电主轴动态设计软件运行可靠、操作简便,可应用于电主轴的动态设计与快速开发。经优选设计后,电主轴的一阶临界转速和主轴端静刚度均有较大幅度的提高。更多还原

【Abstract】 The rotor dynamic characteristics of a high-speed motorized spindle was calculated, while considering the nonlinear variation of bearing radial stiffness with increase of rotational speed, the critical speed and static stiffness of the system,and a software package was developed using Matlab. Taking high speed motorized spindle as an object, the effects of structure of spindle and grinding wheel on dynamic characteristics were analyzed and dynamic optimization of spindle was made by the software. The results show that the software is effective, stable and user-friendly. The first order critical speed and static stiffness of the spindle increases greatly after optimization.更多还原