Optimization of no-whirl-wind self-acting gas bearing groove shape

In order to investigate and grasp the exact working mechanism of self-acting gas bearing, and farther improve the loading capacity, a self-acting effect FEM of infinite wide step-shaped plank was presented; The self-acting effect of rectangular groove section was studied and simulated using this method, the simulation result shows that there is a whirlwind at the root of groove, the whirlwind will produce the loss of energy, and decrease the loading capacity. A transitional slant was used at the groove-ridge boundary to eliminate the effect of the whirlwind. The self-acting effects of the transitional slant with different angles or transitional factors were simulated, and loading capacity curve was fitted with 6-order and the maximum was searched, and we come to the optimal self-acting angle and transitional factor; the simulation results show that the loading capacity of self-acting gas bearing with optimal self-acting angle or transitional factor increased by 6.0% than that with the rectangular section.