织构表面摩擦特性与三维形貌参数的关系研究  

Study on the Relationship Between Friction Characteristics of Textured Surface and 3D Topography Parameters

作　　者：李直 杜溢渊 徐志明 乔旭钱 刘焜[2] LI Zhi;DU Yiyuan;XU Zhiming;QIAO Xuqian;LIU Kun(College of Vehicle and Transportation 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9期17-23,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：为研究表面织构对油润滑界面摩擦特性的影响,建立织构表面摩擦特性与三维形貌参数变化趋势的关系。基于Navier-Stokes方程和空化模型,利用Fluent对光滑表面和3种不同面积占有率的织构表面模型进行仿真,研究不同卷吸速度下织构表面形貌对压力分布和流场分布的影响。根据ISO25178计算织构表面的三维形貌参数,结合摩擦学试验分析不同织构表面的三维形貌参数及摩擦润滑特性的变化趋势。结果表明:在高速条件下,织构对最大油膜压力的改善效果明显;织构的存在扰动了油液的流动,且随着织构面积占有率的增加,单元织构间的协同作用愈加明显;为了更高效地展现织构优势,可选择具有绝对值较小的偏斜度S_(sk)和峰度S_(ku)、较大的空隙体积V_(vv)和较小的负载面积率S_(mr)的三维形貌参数的织构表面,使得织构表面能获得较理想的摩擦特性。In order to study the effect of surface texture on the friction characteristics of oil-lubricated interface,the relationship between the friction characteristics of textured surfaces and the change trend of three-dimensional morphology parameters was established.Based on Navier-Stokes equation and cavitation model,Fluent was used to simulate smooth surface model and three textured surface models with different area occupancy,and the influence of textured surface morphology on pressure distribution and flow field distribution under different entrainment speeds was studied.According to ISO25178,the 3D topography parameters of textured surfaces were calculated,and the change trend of the 3D topography parameters and friction and lubrication characteristics of different textured surfaces was analyzed.The results show that under the high speed condition,the effect of texture on the maximum oil film pressure is obvious.The existence of texture disturbs the flow of oil,and with the increase of texture area occupancy,the synergy between unit textures becomes more obvious.In order to display the texture advantage more efficiently,the texture surfaces with 3D topography parameters such as smaller absolute value of absolute skewness S sk and kurtosis S_(ku),larger valley void volume V_(vv) and smaller loading area ratio S_(mr) can be selected to achieve ideal friction characteristics.

关 键 词：表面织构 三维形貌参数 承载能力 摩擦特性 面积占有率 

分 类 号：TH117.1[机械工程—机械设计及理论]