为研究环面节流静压气体球轴承的承载力特性,提出一种基于三维模型的计算方法.应用非结构同位网格技术对轴承进行网格划分,采用有限体积法对三维稳态可压缩N-S方程进行离散,将适用于可压缩流体的改进的SIMPLE算法应用于离散方程的求解.实验表明,该方法的计算结果与二维有限元法计算结果及实验数据相符,证明算法是有效的. In order to study the bearing capacity of toroidal throttling hydrostatic ball bearings, a calculation method based on three-dimensional model is proposed. The bearing is meshed using the non-structural in-situ grid technique, and the three-dimensional steady state compressible NS equation is discretized, and the improved SIMPLE algorithm which is applicable to compressible fluid is applied to solve the discrete equation.The experimental results show that the proposed method is in good agreement with the two-dimensional finite element method and experimental data.