Investigation of the Effect of Milli-Scale Dimples on Planar Contact Lubrication
Investigation of the Effect of Milli-Scale Dimples on Planar Contact Lubrication
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DOI：
10.1080/10402000903402652
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发表时间：
2010-07
影响因子：
2.1
通讯作者：
Jiadao Wang;Haosheng Chen;Zhongling Han;Darong Chen
中科院分区：
文献类型：
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作者：
Jiadao Wang;Haosheng Chen;Zhongling Han;Darong Chen
它已被证明，表面纹理显着提高负载能力，耐磨性，摩擦系数等的理解，涉及纹理表面的摩擦学机制主要来自流体动力润滑。在流体动力润滑中，负载由流体膜支撑。因此，摩擦力也由流体膜引起的润滑支配。凹坑表面是一种典型的人工纹理表面。当气泡存在于一对表面之间的凹坑中时，由于气泡中的气体与润滑剂之间的表面张力，气泡也支撑载荷。因此，阻力将大大降低，因为与润滑剂相比，气体的粘度可以忽略不计。本文研究了凹坑深度、表面粗糙度、凹坑形状和分布对气体存在和阻力的影响。用Navier-Stokes方程的计算结果解释了实验结果。
It has been proven that surface texturing significantly improves load capacity, wear resistance, friction coefficient, etc. The understanding of the mechanisms involved in the tribology of textured surfaces is mainly derived from hydrodynamic lubrication. In hydrodynamic lubrication, the load is supported by a fluid film. Therefore, the friction force is also dominated by the lubrication induced by the fluid film. Dimpled surface is a typical artificial textured surface. When bubbles exist in the dimples between the pair of surfaces, they also support the load because of the surface tension between the gas in the bubbles and the lubricant. Consequently, the drag will be greatly reduced because the viscosity of the gas can be neglected compared with the lubricant. In this article, the effects of dimple depth, surface roughness, and dimple shape and distribution on the gas existence and drag are investigated. Calculation results from Navier-Stokes equations are given to explain the experiment results.