Numerical Analysis and Experiment Validation of Dynamic Characteristic Frequency of Angular Contact Ball-Bearing at High Speed Spindle System

• Main Authors: Chun-Che Sun, 孫俊哲
• Other Authors: Tian-Yau Wu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/46180875593876049686

碩士 === 國立中興大學 === 機械工程學系所 === 104 === In this research, the dynamic characteristics of TPI 7014C angular contact ball bearing used in high-speed spindle system is studied. Under the running conditions of different preload and rotating speed, a number of dynamic states are investigated, consisting of the balance among the centrifugal force, gyroscopic moment and ball-race contact forces, and the geometric relationship of contact deformation. According to the dynamic characteristics, the contact angles between the ball and inner/outer race are estimated. Using the estimated contact angles between the ball and the inner/outer race, the six characteristic frequencies of bearing can be determined: the rotation frequencies of shaft and cage, the roller spin frequency, the frequency of roller passing through one inner race point, the frequency of roller passing through one outer race point, the frequency of a roller point passing through inner and outer race. The FFT algorithm is utilized to analyze spectral features of different bearing defects. The numerical results of the characteristic frequencies are compared with the experimental observations to verify the accuracy of the estimated contact angles between the ball and the inner/outer race.