关键词: 角接触球轴承, 动力学模型, 缺陷, 机床主轴

Abstract: To overcome the questions such as incomplete traditional angular contact ball bearing dynamic model and distorted defect simulation method,a 7 Degrees Of Freedom (DOF) dynamic model and a defect simulation method were proposed.By considering the nonlinear bearing reaction forces,the Hertz elastic contact theory,the surface defect,the damping and the high frequency resonance,the 7DOF dynamic model was created to reveal the law of affection of defect on bearing dynamic and the vibration transfer process.The simulation method for local defects was presented,and the relation between the defect and continuous change of clearance was researched to reflect the surface profile shape,further more the vibration characteristics of defect was obtained from dynamic model.The vibration response was measured via bearing test rig,thus the differences and common points between the model calculation results and test results were contrasted to verify the validity and effectiveness of the proposed dynamic model which would be applied to theory research and practical engineering of bearings and machine tool spindle.

Key words: angular contact ball bearing, dynamic model, defects, machine tool spindle