放射状楔形槽气浮支承静态性能分析

为提升小孔节流气浮支承的静态性能，设计一种放射状楔形槽气浮支承，该楔形槽呈放射状，其周向截面、径向截面和轴向截面分别为扇形、矩形和梯形。建立放射状楔形槽气浮支承的CFD模型，分析楔形槽结构参数对气浮支承静态性能的影响规律。结果表明：采用放射状楔形槽能够改善气浮支承的气膜压力分布，并提升其承载力和刚度；气浮支承承载力随楔形槽放射角度、入口高度和楔形角的增加逐渐增大，随楔形槽半径增加先升高后降低；气浮支承刚度随楔形槽放射半径、角度、入口高度和楔形角的增加逐渐提高。实验结果与预测结果吻合较好，验证了模型的可行性和准确性。

Static Performance Analysis of Aerostatic Bearing with Radial Wedge Groove Structure

To improve the static performance of the aerostatic bearing,a new type of aerostatic bearing with radial wedge groove structure was presented.The wedge groove is radial,with fan-shaped circumferential section,rectangular radial section and trapezoidal axial section.The CFD models of aerostatic bearing with the radial wedge groove were established.The influence of the radial wedge groove structural parameters on the loading capacity and stiffness of aerostatic bearing was investigated.The results show that the radial wedge groove can improve the loading capacity and stiffness of aerostatic bearing,and optimize the pressure distribution of gas film compared with the traditional pressure groove.The loading capacity of the aerostatic bearing increases gradually with the increase of radial angle,inlet height and wedge angle,and the loading capacity of the aerostatic bearing increases first and then decreases with the increase of the groove radius.The stiffness of aerostatic bearing increases gradually with the increase of wedge groove radius,radial angle,inlet height of wedge groove and wedge angle.Experimental results of load capacity agree with the simulation results greatly,which verifies the feasibility and accuracy of the model.