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表面形貌对粗糙接触界面流体润滑特性的影响
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国家自然科学基金项目(51875152);山西省基础研究项目(201801D121186;201901D211200)


Effect of Surface Topography on Fluid Lubrication Characteristics of Rough Contact Interface
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    摘要:

    为探究不同表面形貌对粗糙接触界面液体润滑特性的影响,基于有限差分法结合雷诺方程和膜厚方程,研究阶梯形貌、波纹形貌、随机形貌和峡谷形貌4种不同粗糙接触界面液体润滑时的载荷分布及规律。研究发现:4种粗糙表面的三维载荷分布规律都与其表面形貌相对应,在波“峰”处载荷大,摩擦力随载荷的增大而增大,在波“谷”载荷小,摩擦力随载荷减小而减小;4种粗糙表面的载荷随表面展开面积比的变化趋势却有所不同;随表面展开面积比的增大,阶梯形貌表面的载荷呈线性增大,波纹形貌表面的载荷基本不变,随机分布形貌表面的载荷呈增大趋势,峡谷形貌表面的载荷呈先增大后减小的变化趋势。研究结果可以进一步补充现有表面形貌表征和流体润滑等相关研究理论。

    Abstract:

    In order to explore the effect of different surface topography on the liquid lubrication characteristics of rough contact interface,based on the finite difference method combined with the Reynolds equation and the film thickness equation,the load distribution and regularity of the four different rough contact interfaces during step lubrication were studied,including ripple shape,random shape and canyon shape.It is found that the threedimensional load distribution laws of these four rough surfaces all correspond to their surface topography,the load is large at the “peak” of the wave,and the friction force is increased with the increase of the load.While the load at the “valley” of the wave is small,and the friction force is decreased with the decrease of the load.However,the change trend of the load of these four rough surfaces with the surface expansion area ratio is different.With the increase of the surface expansion area ratio,the load on the stepped morphology surface is increased linearly,the load on the corrugated morphology surface remains unchanged,the load on the randomly distributed morphology surface is increased,and the load on the canyon morphology surface is increased at first and then decreased.The research results can be used to supplement the existing researches on surface characterization and fluid lubrication.

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董 磊,车飞飞,刘 焜,王俊元,石瑞敏.表面形貌对粗糙接触界面流体润滑特性的影响[J].润滑与密封,2020,45(12):13-18.
DONG Le, CHE Feifei, LIU Kun, WANG Junyuan, SHI Ruimin. Effect of Surface Topography on Fluid Lubrication Characteristics of Rough Contact Interface[J]. Lubrication Engineering,2020,45(12):13-18.

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  • 在线发布日期: 2021-04-22
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