表面织构分布模式对滑动摩擦副流体润滑性能的影响  

Impact of Surface Texture Arrangement on Lubrication Performance of Sliding Friction Pairs

作　　者：孙浩程 严志军[1] 徐久军 刘泽 吴世博 孙涛 SUN Haocheng;YAN Zhijun;XU Jiujun;LIU Ze;WU Shibo;SUN Tao(Marine Engineering College,Dalian Maritime University,Dalian 116026,China;Transportation Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学轮机工程学院,大连116026 [2]大连海事大学交通运输工程学院,大连116026

出　　处：《中国表面工程》2025年第1期152-161,共10页China Surface Engineering

基　　金：国家自然科学基金(51779023)。

摘　　要：表面织构有一定的减摩作用,然而织构分布模式对润滑性能的影响还须进一步完善。为研究流体润滑条件下表面织构分布模式对润滑性能的影响,建立考虑油膜厚度的三维织构非均匀分布计算模型,采用CFD(Computationalfluid dynamics)方法并利用UDF(Userdefinefunction)和动网格技术,研究织构面积密度和分布模式对摩擦因数、油膜厚度、压力分布和气相分布的影响。结果表明:在外载荷恒定的条件下,随着织构面积密度的增加,两种非均匀分布织构相较于均匀分布织构均可促进空化效应,提高油膜厚度,使速度梯度和剪切应力减小,摩擦因数减小。当织构面积密度为14.14%时,与均匀分布织构相比,渐疏分布织构的摩擦因数降低了26.5%,油膜厚度提高了53.5%。渐密分布织构的摩擦因数降低了24.2%,油膜厚度提高了32.5%。试验中两种非均匀分布模式的织构均可提高润滑性能,与模拟结果趋势一致。研究表面织构分布模式对润滑性能的影响,可为优化织构分布设计及对织构性能的研究方法提供新的思路和理论参考。Currently,few studies have addressed three-dimensional numerical models that consider oil film thickness,hydrodynamic pressure,and cavitation effects.Notably,a research gap exists in exploring the influence of texture distribution modes on lubrication performance.Therefore,advancing relevant research is imperative.To investigate the impact of surface texture distribution modes on lubrication performance under fluid lubrication conditions,this study aims to establish a three-dimensional calculation model for non-uniform texture distribution while accounting for oil film thickness.The model will utilize Computational Fluid Dynamics(CFD)methods,along with a User Defined Function(UDF)and dynamic mesh technology,to systematically explore how texture area density and distribution modes affect key parameters,including friction factor,oil film thickness,pressure distribution,and gas phase distribution.The numerical simulation results indicate that,under constant external load conditions,increasing texture area density leads to a decrease in the spacing of uniformly distributed textures.This phenomenon enhances the hydrodynamic lubrication effect while concurrently inhibiting the cavitation effect,resulting in a thinning of the oil film and an increase in the friction factor.In contrast,non-uniformly distributed textures enhance the hydrodynamic lubrication effect and weaken the suppression of the cavitation effect.This leads to an increase in the bearing capacity of the oil film,thickening of the oil film,a decrease in the velocity gradient,a reduction in shear stress,and a lower friction factor.Additionally,non-uniformly distributed textures alter pressure distribution,forming a localized high-pressure zone.The high-pressure zone generated by gradually sparse textures is larger and positioned closer to the symmetry center compared to that created by closely distributed textures.In terms of gas volume,the cavity volume associated for sparser distribution textures is greater than that of more closely arranged textures.Ove

关 键 词：织构分布 空化效应 油膜厚度 动网格 UDF 

分 类 号：TH117[机械工程—机械设计及理论]