Abstract
Close attentions have been widely paid to the engineering textured and slip surfaces for improving bearing tribological performances. Comparison studies on the tribological characteristics of slip and textured surfaces are carried out in this work. The analysis results point out that the influences of surface texture and boundary slip on tribological performances of slider bearing are strongly similar. For the determinate surface textures, there is one and only value of slip velocity to make the tribological performances of textured and slip surfaces in agreement. The corresponding relation between the slip velocity and the texture structure parameters is also obtained, and the size of slip velocity is directly related to the texture geometry parameters including its position parameters. This study will help us to further understand the relationship between boundary slip and surface texture and also the slip phenomenon.
Highlights
In order to enhance bearing performance, some innovative approaches are developed, for instance, engineering textured and slip bearing, as well as novel-configuration bearing [1,2,3,4,5,6]
Hamilton et al pointed out that the improvement of loadcarrying capacity resulted from the asymmetric pressure distribution induced by surface texture [8]
He showed that slider bearing with slip against its stationary surface could generate both an increase in load support and a reduction in friction. Both the slider bearing and hydrodynamic journal bearing with a heterogeneous slip/noslip surface were analyzed by Salant and Fortier; the results demonstrated that boundary slip would result in good load-carrying capacity and low friction [2, 27]
Summary
In order to enhance bearing performance, some innovative approaches are developed, for instance, engineering textured and slip bearing, as well as novel-configuration bearing [1,2,3,4,5,6]. In order to discuss optimal texturing properties for minimizing friction or maximizing fluid film thickness, a study on the influence of different texturing parameters on hydrodynamic performance was proposed by Dobrica et al [16] Fesanghary and his coworker paid many attentions on the optimization design of texture shape and geometry for improving load-carrying capacity based on sequential quadratic programming algorithm [5]. Spikes developed a hydrodynamic lubrication model based on an extended Reynolds equation and analyzed the application of slip surface [26] He showed that slider bearing with slip against its stationary surface could generate both an increase in load support and a reduction in friction. Some interesting results are obtained, which will help people to further understand surface texture and boundary slip
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