摘要
鉴于基于力激励函数的损伤表征方法无法准确描述滚子轴承“非贯通型”损伤,提出了基于滚子-滚道接触刚度和阻尼变化的损伤表征方法,并在此基础上构建外圈损伤圆锥滚子轴承振动分析模型,探求“非贯通型”损伤诱发滚子轴承异常振动的内部机理,对比分析了“贯通型”与“非贯通型”损伤对圆锥滚子轴承振动特性的影响,并结合试验验证了所构建模型的有效性。研究结果表明:“非贯通型”损伤沿其长度方向扩展将引起损伤激励幅值增大,沿其宽度方向扩展将引起损伤激励叠加;有量纲特征值随损伤长度的增加单调递增,能准确反应“非贯通型”损伤沿其长度方向的扩展程度,有量纲和量纲一化特征值均随损伤宽度增加无序波动,无法准确反映“非贯通型”损伤沿其宽度方向的扩展程度。
A force-incentive-function-based damage characterization method is difficult to accurately describe the"non-through"damage of roller bearings,a damage characterization method is proposed based on changes of roller-raceway contact stiffness and damping.On this basis,a vibration analysis model for tapered roller bearings with outer ring damage is constructed,the internal mechanism of abnormal vibration of roller bearings induced by"non-through"damage is explored,the effect of"through"damage and"non-through"damage on vibration characteristics of the bearings are comparatively analyzed,and the validity of proposed model is verified by experiments.The results show that:the damage excitation amplitude increases when the"non-through"damage is extended along its length direction,and damage excitation superposes when the damage is extended along its width direction;the dimensional eigenvalue increases monotonically with increase of damage length,which accurately reflect the extension degree of"non-through"damage along its length direction,the dimensional and dimensionless eigenvalues both fluctuate disorderly with increase of damage width,which cannot accurately reflect the extension degree of"non-through"damage along its width direction.
作者
刘煜炜
李文超
王建磊
樊星煜
刘夏移
LIU Yuwei;LI Wenchao;WANG Jianlei;FAN Xingyu;LIU Xiayi(School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi’an 710048,China;Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China;Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an 710049,China)
出处
《轴承》
北大核心
2023年第7期67-73,共7页
Bearing
基金
河南省高性能轴承技术重点实验室开放基金资助项目(2020ZCKF06)。
关键词
滚动轴承
圆锥滚子轴承
外圈
表面损伤
裂纹扩展
振动试验
rolling bearing
tapered roller bearing
outer ring
surface damage
crack propagation
vibration test
