Numerical Simulation and Experimental Study of the Static Performance of the Aerodynamic Bearings

In order to study the static performance of aerodynamic bearings, the conical aerodynamic bearings was developed and designed in this study. Based on the established mathematical model, the conformal mapping and oblique coordinate transformation of the calculated regions of the controlling equations were processed and the finite difference formulas of the governing equations were deduced in oblique coordinate system by employing the regional integral finite difference method, the static performance of the controlling equations was analyzed using numerical method by Visual Basic. The results show that the spiral groove can get better dynamic pressure performance of the aerodynamic bearings and the effect of dynamic pressure was more obvious with the increasing bearing speed. The influence of the spiral angle and the groove depth ratio on the static performance had an optimal value and the capacity of the bearing did not increase obviously when the groove number and groove width ratio reached a certain value. Experimental results verified the correctness of numerical calculation and provided a valuable reference of the study and design of the air-floating dynamic pressure bearing.