弹流润滑界面织构形貌的功能保持性分析  

Functional Retention Performance Analysis of Textured Topography Under Elastohydrodynamic Lubrication Interface

作　　者：李直 乔旭钱 徐志明 杜溢渊 刘焜[2] LI Zhi;QIAO Xuqian;XU Zhiming;DU Yiyuan;LIU Kun(College of Vehicle and Traffic Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China;School of Mechanical Engineering,Hefei University of Technology,Hefei Anhui 230009,China)

机构地区：[1]太原科技大学车辆与交通工程学院,山西太原030024 [2]合肥工业大学机械工程学院,安徽合肥230009

出　　处：《润滑与密封》2024年第12期1-7,共7页Lubrication Engineering

基　　金：山西省应用基础研究计划青年科学研究项目(20210302124320)。

摘　　要：为研究弹流润滑条件下点接触摩擦副织构表面形貌在工作过程中的功能保持性,以光滑球与粗糙平面构成的接触副作为研究对象,设计3组具有不同凹坑面积占有率和相同深径比的织构表面。根据点接触等温弹流润滑理论建立幅值缩减曲线,结合快速傅里叶变换预测不同工况参数下织构表面弹性变形引起的弹流润滑接触界面功能特性的变化。采用三维形貌参数体系ISO 25178中的表面高度算术平均值S_(a)和平均空体体积V_(vv)表征表面功能特性的变化过程,并利用MMW-1000型摩擦磨损试验机对设计的织构试样进行摩擦试验,研究表面形貌的功能特征以及摩擦特性随载荷和转速的变化规律。研究结果发现:随着载荷、转速等工况参数的变化,摩擦副接触界面织构形貌发生了弹性变形,变形改变了织构表面的三维形貌参数和功能特性,且形貌参数的变化与界面摩擦因数在不同工况下呈现的规律具有相关性。在进行弹流润滑条件下的织构研究中,结合三维形貌参数体系能更好地衡量真实接触表面微结构的功能特性保持情况。In order to study the functional characteristics of the textured surface in the practical working process under the condition of elastohydrodynamic lubrication(EHL),the contact pair composed of smooth ball and rough plane was considered as the research object,three groups of textured surfaces with different micro-pit area ratio and the same depth-diameter ratio were designed.The amplitude reduction curve was established according to the point contact isothermal elastic lubrication theory,and the changes in the functional characteristics of the contact interface caused by the elastic deformation of the textured surface was predicted under different working parameters by the fast Fourier transform.The arithmetic mean of surface height S_(a)and average empty volume V_(vv)in the ISO 25178 were used to characterize the change process of functional characteristics,and the friction test of the textured surface was carried out in MMW-1000 friction and wear testing machine,the variation law of functional characteristics of surface topography with load and speed was studied.The results show that with the change of load,speed and other working parameters,elastic deformation occurs at the elastic contact interface,the deformation changes 3D topography parameters and functional characteristics of the textured surface,and the change of topography parameters is related to the variation law of friction coefficient under different working conditions.In the study of textured surface under elastohydrodynamic lubrication conditions,the functional retention performance of the microstructure of real contact surface can be better measured by combining with the three-dimensional topography parameter system.

关 键 词：弹流润滑 幅值缩减 表面织构 三维形貌参数 功能特性 

分 类 号：TH117.2[机械工程—机械设计及理论]