考虑粗糙度的复合微织构轴承动力特性分析  

Analysis on Dynamic Characteristics of Composite Micro‑textured Bearing Considering Surface Roughness

作　　者：王丽丽[1,2] 张伟[1,2] 段敬东 李国清[3] 葛雪 WANG Lili;ZHANG Wei;DUAN Jingdong;LI Guoqing;GE Xue(College of Mechanical and Electronic Engineering,Shandong University of Science and TechnologyQingdao,266590,China;Shandong Province Key Laboratory of Mine Mechanical Engineering,Shandong University of Science and TechnologyQingdao,266590,China;Shandong Keda M&E Technology Co.,Ltd.Jining,272000,China)

机构地区：[1]山东科技大学机械电子工程学院,青岛266590 [2]山东科技大学矿山机械工程山东省重点实验室,青岛266590 [3]山东科大机电科技股份有限公司,济宁272000

出　　处：《振动．测试与诊断》2024年第3期544-550,621,622,共9页Journal of Vibration,Measurement & Diagnosis

基　　金：山东省矿山机械工程重点实验室校企联合基金资助项目(2022KLMM304);山东省博士后创新专项资金资助项目(201701016)。

摘　　要：为了提高滑动轴承旋转摩擦副的动力学性能和优化轴承结构,综合考虑表面粗糙度和复合微织构等因素,建立轴承转子系统的动力学特性计算模型,从理论上研究了考虑表面粗糙度时的复合微织构轴承的稳定性。针对圆形复合矩形微织构轴承,计算了不同粗糙度下轴承的油膜压力和临界速度,分析了不同复合微织构深度下的轴承刚度系数、阻尼系数及临界速度。研究结果表明:复合微织构轴承可以获得更大的临界速度,提高轴承的稳定性;复合微织构轴承的稳定性随织构深度的增大先增大后减小,在圆形和矩形织构无量纲深度分别为0.2和0.3附近稳定性最佳;相较于不考虑粗糙度时,采用均方根偏差为0.209μm时的考虑粗糙度的复合微织构轴承稳定性更佳,但最佳织构深度有所减小。In order to improve the dynamic performance of the rotating friction pair of journal bearing and optimize the bearing structure,the calculation model for dynamic characteristics of bearing rotor system is established considering the factors of surface roughness and composite micro texture.The stability of compound micro textured journal bearing considering surface roughness is studied theoretically.For circular compound rectangular micro textured journal bearing,the oil film pressure and critical velocity of bearing at different roughness are calculated,the stiffness coefficient,damping coefficient and critical speed at different compound micro textured depths are analyzed.The theoretical research shows that composite textured bearing can obtain greater critical speed,ensuring the better stability of bearing.The stability of compound micro textured journal bearing first increases and then decreases with the increase of texture depth,and the stability is the best when the dimensionless depth of circular and rectangular texture is 0.2 and 0.3 respectively.In addition,when the root mean square deviation is 0.209μm,the composite micro texture bearing considering roughness has better stability compared with ignoring surface roughness,but the optimal textured depth reduces.

关 键 词：复合微织构轴承 织构深度 动力学特性 临界速度 表面粗糙度 

分 类 号：TH117[机械工程—机械设计及理论]