Abstract
The hydrodynamic lubrication performance of partially textured gas parallel slider bearings with orientation ellipse dimples is investigated in this paper. By using the multigrid finite element method, the pressure distribution between a partially textured slider and a smooth slider is obtained. The geometric parameters of the ellipse dimples are optimized to maximize the average pressure under a given sliding speed. The numerical results show that geometric parameters such as orientation angle, depth, slender ratio, and area density have an important impact on hydrodynamic pressure. Besides, the effect of textured fraction on hydrodynamic pressure is investigated under a given sliding speed. It is observed that the optimum textured fraction for maximizing the average pressure is dependent on the sliding speed.
Highlights
Surface texturing is a viable option for improving the frictional performance of mechanical components
With the functions surface texturing has been applied to a thrust bearing [5], piston ring [6], mechanical seal [7], and gas seal [8]
Orientation ellipse dimples are conducted to evaluate the hydrodynamic lubrication of partially textured gas parallel slider bearings, and special attention is paid to the effects of orientation angle, depth, slender ratio, area density, and textured fraction on average pressure
Summary
Surface texturing is a viable option for improving the frictional performance of mechanical components. E effect of orientation ellipse dimples on hydrodynamic lubrication has been systematically investigated for partially textured oil-lubricated parallel slider bearings [18]. No investigations detailing the effect of orientation ellipse dimples on hydrodynamic lubrication seem to exist in the available literature for partially textured gas parallel slider bearings. Orientation ellipse dimples are conducted to evaluate the hydrodynamic lubrication of partially textured gas parallel slider bearings, and special attention is paid to the effects of orientation angle, depth, slender ratio, area density, and textured fraction on average pressure. The steady-state Reynolds equation for partially textured gas parallel slider bearings with orientation ellipse dimples can be written as z. E dimensionless steady-state Reynolds equation for partially textured gas parallel slider bearings with orientation ellipse dimples can be written as z. After the dimensionless pressure P is obtained, the dimensionless average pressure Pav can be obtained by
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