表层下缺陷对球-环系统的振动影响分析

表层下缺陷严重影响滚动轴承使用性能与精度，为研究其对轴承振动特性影响，搭建了球-环接触实验台，使用球-环接触模型模拟滚动体与滚道接触，以圆环内表面或表层下加工的圆孔模拟缺陷，通过实验过程中对球托振动位移和载荷的测量，研究了缺陷对系统振动的影响。实验结果表明，随着载荷增加，表层下缺陷对系统振动行为的影响逐渐增大，但是影响显著小于表面缺陷；随着转速升高，缺陷对系统振动的影响逐渐减小，并通过理论建模进行了分析和验证；研究表明滚道缺陷是影响系统精度保持性的重要因素之一。
Abstract：Subsurface defects seriously affect rolling bearings’ performance and accuracy.In order to investigate their influences on bearing vibration characteristics, a ball-ring contact test rig was built to simulate contacts between balls and races in bearings using a ball-ring contact model.Manufactured micro holes on ring surface or subsurface were used to simulate defects.Then effects of defects on the system vibration were investigated through measuring vibration displacements and loads of the ball-ring contact system in tests.The test results showed that effects of subsurface defects on vibration behavior of the system increase with increase in loads, but the effects are obviously smaller than those of ring surface defects; influences of defects on vibration behavior of the system decreases with increase in rotating speed, the influences are analyzed and verified through theoretical modeling; race defects are one of important factors affecting the precision retaining ability of bearing systems.