摘要
为研究在流体润滑条件下,表面微织构形貌参数对润滑性能的影响,建立考虑空化效应的单织构三维计算模型。用CFD方法模拟织构在不同深度、面积密度和表面形状条件下,油膜承载力、摩擦因数和压力分布的变化情况。结果表明:随着织构深度(面积密度)的增加,油膜的承载力先增大后减小,摩擦因数先减小后增大,即织构存在最优的深度和面积密度使得流体动压润滑性能最优;随着上壁面滑移速度的增大,织构的最优深度有减小的趋势,而最优面积密度趋于稳定;设计具有汇流作用的织构表面形状可以提高油膜的承载力,且速度越大,改善润滑的效果越明显。
In order to study the influence of surface micro texture morphology parameters on lubrication performance under fluid lubrication conditions,a single texture 3 D calculation model with cavitation effect was established.CFD method was used to simulate the change of oil film bearing capacity,friction coefficient and pressure distribution under different texture depth,area density and dimple shape.The results show that with the increase of texture depth(area density),the bearing capacity of oil film is first increased and then decreased,and the friction coefficient is first decreased and then increased,that is,the texture has the optimal depth and area density,which makes the hydrodynamic lubrication performance optimal.With the increase of the slip velocity of the upper wall,the optimal depth of the texture tends to decrease while the optimal area density tends to stabilize.The surface shape of texture with confluence can improve the bearing capacity of oil film,and the higher the speed,the more obvious the effect of improving lubrication.
作者
王剑豪
严志军
申子玉
潘新祥
WANG Jianhao;YAN Zhijun;SHEN Ziyu;PAN Xinxiang(Marine Engineering College,Dalian Maritime University,Dalian Liaoning 116026,China;College of Ocean Engineering,Guangdong Ocean University,Zhanjiang Guangdong 524088,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2021年第7期37-43,60,共8页
Lubrication Engineering
基金
国家自然科学基金项目(51779023)。
关键词
表面织构
润滑性能
空化效应
形貌参数
surface texture
lubrication performance
cavitation effect
morphology parameters
