In order to improve the load capacity of spindle support and enhance the working performance of precision machine tool

the hydrostatic spherical gas bearing was chosen as the research object. The bearings were set up in different forms of latitudinal or longitudinal grooves. The axial load capacity of bearings with radial and axial eccentricity was researched by CFD theory. The relationship between axial load capacity and geometric dimensions of latitudinal and longitudinal grooves was analyzed. It is found that the latitudinal grooves can homogenize the gas pressure in bearing clearance and slow down the speed of pressure reduction to improve axial bearing capacity. Through the pressure homogenization and dynamic pressure effect

the longitudinal grooves can increase the pressure of gas film flow field and improve the load capacity and stiffness of bearing. The axial load capacity of hydrostatic spherical gas bearing is greatly influenced by the width of latitudinal grooves and the depth of longitudinal grooves. Increasing the width of latitudinal grooves or the depth of longitudinal grooves can improve the axial load capacity faster in a certain range. It would provide reference for application of gas bearing in heavy load situations to research the influence of forms and geometric dimensions of the latitudinal and longitudinal grooves on the axial load capacity.