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This paper conducts a numerical investigation of the effects of micro spherical and cylindrical dimples on the load-carrying capacity of the journal bearing with axial grooves, aiming to obtain the best lubrication performance. In order to analyze the lubrication performance, the mass conservative JFO (Jakobsson, Floberg, Olsson) cavitation boundary condition is adopted to address the oil film rupture and reformulation, and the Reynolds equation is used to build the hydrodynamic lubrication model for the dimple-textured journal bearing with axial grooves. On this basis, the author examines how the shape, location and geometric parameters of the dimples influence the load-carrying capacity at various eccentricities. The results show that the dimples can significantly improve the load-carrying capacity of the bearing, especially when the dimples are textured on bearing pad 3, and that the maximum load-carrying capacity can be obtained with micro cylindrical dimples of area ratio s=0.5, maximum depth hd=300 μm, circumferential number m3= 6, and axial number n3= 4.

Optimal surface texture design of journal bearing with axial grooves