表面微织构椭圆轴承的热效应分析  

Thermal Effect Analysis of Surface Micro-textured Elliptical Bearing

作　　者：王丽丽[1] 何梦雪 张伟 葛雪 段敬东 WANG Li-li;HE Meng-xue;ZHANG Wei;GE Xue;DUAN Jing-dong(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Shandong Qingdao 266590,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《表面技术》2022年第8期291-297,共7页Surface Technology

基　　金：山东省博士后创新项目专项资金(201701016);青岛市博士后研究人员应用研究项目。

摘　　要：目的提高摩擦副润滑性能,从而研究表面微织构不同参数对椭圆轴承热效应的影响,同时采用试验方法进一步说明微织构的减摩作用机理。方法建立表面微织构椭圆轴承仿真模型、编写UDF程序定义黏度,同时采用面-面接触形式的摩擦磨损试验,从理论和试验两个方面研究不同微沟槽宽度和微沟槽轴向分布率的椭圆轴承的热效应变化规律。结果表面微织构能够有效改善摩擦副表面的摩擦学性能,沟槽状微织构椭圆轴承较光滑椭圆轴承温度均有所降低,主要承载区出现轴向呈条状的低温区域,出现位置大致与沟槽分布位置一致。随着微沟槽轴向分布率的增大,微沟槽降温效果增强,轴承承载力先升高后降低,摩擦力先降低后升高,端泄量先减小后增大,沟槽轴向分布率取0.6较为合适。随着微沟槽宽度的增大,轴承承载力呈先升高后降低的变化趋势,摩擦力呈先降低后升高的变化趋势,当宽度在0.6~0.8 mm时,椭圆轴承有较优的润滑性能。结论理论分析和试验研究均表明,表面微织构椭圆轴承的摩擦力随着微沟槽宽度的增大先降低后升高,合适的微织构参数才能最大程度地发挥其减摩作用,从而实现提升轴承润滑性能,降低轴承温升的目的。This study aims to improve the lubrication performance of friction pair,and study the influence of different surface micro-texture parameters on the thermal effect of elliptical bearings.At the same time,experiments is used to further illustrate the anti-friction mechanism of the micro-texture.A simulation model of surface micro-textured elliptical bearings by Gambit was established,viscosity was defined by writing UDF program,and wear experiments by surface-to-surface contact friction were taken.The thermal effect of elliptical bearings under different micro-groove widths and axial distribution rate of micro-grooves was analyzed by theory and experiment.The results show that surface micro-texture can improve effectively the tribological properties of friction pair.The groove-shaped micro-texture has the lower temperature than smooth elliptical bearing,the main bearing area has a strip-shaped low temperature area in the axial direction,and the appearance position is consistent with the groove distribution position.With the increase of the axial distribution rate of micro-groove,the cooling effect of micro-groove is enhanced,bearing capacity first increases and then decreases,friction force first decreases and then increases,end discharge first decreases and then increases,and the axial distribution rate of micro-grooves is 0.6.As the micro-groove width increases,the bearing capacity first increases and then decreases,the friction force of the bearing first decreases and then increases,the elliptical bearing has better lubrication performance when the micro-groove width is between 0.6 and 0.8 mm.Both theoretical analysis and experimental research show that the friction force of surface micro-textured elliptical bearing first decreases and then increases with the increase of micro-groove width.Appropriate micro-texture parameters can maximize its anti-friction effect,the purpose of improving bearing lubrication performance and reducing bearing temperature rise can be achieved.

关 键 词：椭圆轴承 微织构 热效应 微沟槽宽度 微沟槽轴向分布率 试验研究 

分 类 号：TH117[机械工程—机械设计及理论]