WU Li jie, YANG Chun e, WANG Wei hui

 

(China Nuclear Power Engineering Co., Ltd.， Shenzhen 518124, China)

 

 

Abstract: Aiming at the problems of low loading capacity, low stiffness ,which exist in aerostatic radial bearing.Study on the relationship between the structure and the static characteristics of aerostatic radial bearing was carried out. The flow condition of radial bearing was proved. The three dimensional flow field of aerostatic radial bearing in different flow conditions was simulated by the finite element analysis software ANSYS,The effect of the axial position of the orifice, orifice diameter,gas pressure and average radius clearance on the static characteristics of aerostatic radial bearing was analyzed And obtained the diagram of curves accordingly.The optimized structrue of radial bearing was selected by comparing the loadbearing characteristics .The results indicate that the flow condition of radial bearing was compressible and turbulent. The engineering calculation results is good agreement with the simulation results.The tolerance achieved four percent that proves numerical simulation is effective.Which provides theories basis for design of the ultrahighspeed aerostatic motorized spindle.

 

Key words: aerostatic radial bearing;static characteristics; finite element analysis; threedimensional flow field