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Hydrodynamic effects of texture geometries onjournal bearing surfaces

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10th International Conference on Tribology ROTRIB’07, Bucharest, Romania from 8 to 10 November 2007.

2007

Hydrodynamic effects of texture geometries on journal bearing surfaces

Nacer Tala-Ighil, Patrick Maspeyrot, Michel FILLON, Abdelhamid BOUNIF

Abstract : Lately, the expanding range of tribological applicationsto the microscopic levels has revived interest in thisfield.

Actually, little is understood about the subtle effects of variations of a journal bearing’s profile uponits performance. The surface texturing is expected to make an important contribution to future technologies of bearing. Numerical study based on finite difference methods is used to find the tendency of important tribological properties of a journal bearing such as minimum film thickness, maximum pressure, axial oil flow and friction torque.The present work is a comparative study of the hydrodynamic effects of a few deterministic texture shapes in a journal bearing application. The geometry and the size of textures affect load capacity and friction torque. The cubic textures show advantages compared to the other geometries for the improvement of the performances of the bearing. In general, the impact of shapes is more visible for higher asperity area inaccordance with the geometrical differences.

Keywords : texture, lubrication, hydrodynamic, journal bearing

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