Effect of Characteristic Parameters and Distribution of Friction Pair Surface Texture on Lubrication Properties

Abstract

Based on the basic mechanism and bionics principle that texture affects the dynamic pressure effect of lubricating medium, a V-shaped texture that converges along the sliding direction is designed. Through numerical simulation, the optimal geometric parameters and distribution of the V-shaped and textures are obtained. A textured surface with various texture features is prepared using a nanosecond ultraviolet laser with bearing steel as substrate. Tribological experiments with friction and wear tester are performed to investigate the effect of characteristic parameters and distribution of surface texture on the lubrication performance and the lubrication properties are compared and analyzed with that of circular texture. Hence, this investigation provides a research direction to improve the lubrication performance between frictional pairs under fluid lubrication condition to reduce the frictional wear of mechanical systems. The results show that under the conditions of optimal parameters, due to the effect of convergence and extrusion on the flow of lubrication medium, the V-shape texture is better than the circular texture in improving the lubrication performance. The optimal characteristic parameters of V-shape texture are: 60° for the angle between the two wings, 0.53 for shape parameter, 25.9% for area ratio, 13 μm depth, 60% texture area coverage ratio, and the inlet of flow field of the texture distribution position.

Experimental Study of the Rheology of Grease by the Example of CIATIM-221 and Identification of Its Behavior Model

“…Lubricants are an integral part of the actual tribology problem [20]. In this case, several works [21][22][23] point out the importance of conducting full-scale and numerical experiments to determine the properties and perform mathematical modeling of their behavior.…”

“…One of the actual problems is the study of the dynamic characteristics of the lubricant behavior [21][22][23][29][30][31], including the viscoelasticity, viscoplasticity, etc. Many studies [32,33] describe lubrication by Maxwell-type equations.…”

The Influence of the Geometry of Movement during the Friction Process on the Change in the Tribological Properties of 30CrNiMo8 Steel in Contact with a G40 Steel Ball

“…Depending on the chosen experimental parameters of the friction pairs, different shapes of the COF curves can arise [ 26 ]. In general, however, the COF curve represents the shape shown in Figure 1 , which is divided into two main parts.…”