圆形腔多油垫恒流静压推力轴承流场数值分析

摘要

The paper studied the gap fluid in the hydrostatic thrust bearing with circular cavity multi-pad and constant current which is applied in the heavy numerical control equipment, simulated the three-dimensional velocity field and the pressure field, found the influence law the cavity area has on the performance of the gap flow field based on the computer fluid dynamics and lubrication theory, and presented the flow characteristics of the gap flow field. The results show that the cavity pressure will increase and decrease with the increase of the cavity area and a-chieve the maximum value, and the optimal area was obtained. However, the cavity area has little effect on the velocity field.%对重型数控设备中所应用的圆形腔多油垫恒流静压推力轴承间隙流体进行研究,应用计算流体动力学和润滑理论,数值求解间隙流体的三维速度场和压力场,发现了油腔腔面积对间隙流场性能的影响规律,揭示了间隙流场的流动特性.计算结果表明:油腔压力随着油腔面积增大先增加后减小,在某一位置油腔压力达到极大值,得到油腔面积最优值；而腔面积对流动速度场影响不大.