摘要
高速电主轴作为高速机床的核心部件,其性能直接影响着机床的加工精度。为了研究高速电主轴的模态特性,建立了一种高速电主轴有限元模型。该模型考虑了轴向预紧力、振型形状、离心力和回转力矩对固有频率的影响,同时也考虑了转子分布质量、非线性轴承刚度和主轴旋转运动等因素的影响。利用有限元模型,对某高速电主轴的模态特性进行了分析,由实验结果证明了仿真分析结果的有效性。
As the core component of high-speed machine tools, performance of high-speed motorized spindle directly affects themachining accuracy of machine tools. In this paper, the FEM model of motorized spindle is set up to research on its modal and dynamiccharacteristics, which is affected by the axial preload on the natural frequency, natural frequencies of the motorized spindle andcorresponding vibration shapes, centrifugal forces and gyroscopic moments on the motorized spindle shaft. The mass distribution ofrotor, the non - linearity of bearing rigidity and the whirling motion of spindle are taken into account in modeling. The dynamiccharacteristics and modal characteristics of motorized spindles were analyzed experimentally. Numerical analysis was done and results werevalidated with experimental results.
出处
《机电工程技术》
2017年第3期88-91,共4页
Mechanical & Electrical Engineering Technology
基金
湖北省教育厅科研项目(编号:B2015339)
关键词
高速电主轴
固有频率
有限元
high-speed motorized spindle
natural frequency
ANSYS
