Numerical Analysis of Static Performance for Ultra Precision Spindle Supporting by the Aerostatic Bearing

To evaluate the static performance of the ultra precision Spindle,the finite element models were used to caluclate pressure distribution in the aerostatic bearing.The weight,stiffness and the supply air flow of aerostatic journal and thrust bearing were evaluated.Study the effect of bearing parameters on the static performance of the aerostatic bearing.The design rules for aerostatic bearing were proposed.The load,radial stiffness,axial stiffness and angular stiffness of precision spindle were formulated.The analysis method was tested to be right by the experiments.