滾珠軸承轉子動態特性分析

• Main Author: 沈慶輝
• Other Authors: 陳明飛
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/33329550562752470983

碩士 === 國立彰化師範大學 === 機電工程學系 === 99 === The spindle with ball bearings has been widely used in PCB prototyping machines. The dynamic characteristics of the spindle-bearing system have a significant effect on the performance of PCB prototyping machines. Focusing on how to make the system stable will be the design priority. This study focuses on the analyses of radial stiffness of angular contact ball bearings and the dynamic characteristics of the spindle- bearing system. Initially, the angular contact ball bearings are discussed. According to Hertz contact theory, the relation of axial preload and the radial stiffness of angular contact ball bearings is calculated by using Jones and Harris methods. Finally, the bearing radial stiffness will be involved in the spindle-bearing system. The dynamic parameters, natural frequencies and mode shapes, are obtained by using finite element analysis and experimental modal analysis. The result is compared and FEM model could be verified and updated.