摘要
主要研究陶瓷球轴承高精密电主轴动态性能。首先简化并建立轴承—转子系统模型,然后根据电主轴高精度要求选择合适的预紧力,并计算出前后轴承的径向刚度;将所建模型导入软件,根据径向刚度值进行模态分析,结果可以看出所设计电主轴在实际运转中不会产生共振;最后分析出电机转子安装位置变化对临界转速的影响不大,并对比跨距和悬伸量两个模态参数对临界转速的影响,跨距影响最大,悬伸量次之,而安装位置影响最小。该研究为电主轴的设计提供良好的理论依据。
It mainly analyzes the dynamic characteristics for high precision motorized spindle of ceramic ball bearing. Firstly a 3D FEA model of bearing-spindle system is given, then the pretightening force is selected according to high precision and the radial rigidity of shafting bearings is calculated; dynamic analysis is finished in response to the radial rigidity after the FEA model was built in ANSYS, and it suggested that resonance vibration of the motorized spindle can not occur during working; lastly it analyses that the effect of motor rotor position on whirling speed is small. In contrast, the effect of other two modal parameters which are extended length and length of span is bigger and the effect of length of span is the biggest. The research provides good theoretical basis for motorized spindle design.
出处
《机电工程技术》
2014年第4期66-70,共5页
Mechanical & Electrical Engineering Technology
基金
浙江省自然科学基金(编号:LQ12E05011)
浙江省教育厅项目(编号:FW2012012)
关键词
预紧力
径向刚度
临界转速
电机转子安装位置
pretightening force
radial rigidity
critical rotate speed
motor rotor position
