Design and performance analysis of orifice-compensated aerostatic bearings
QIU Dezhong
LEI Weining
XUE Yaping
Abstract：Focusing on the performance of single-orifice aerostatic bearings,the effect of design parameters on load capacity and stiffness was investigated,aiming to optimize the structural design and performance of aerostatic bearings.A parametric model of the single-orifice aerostatic bearing was developed using the finite element method.The influence of fac-tors such as air cavity design,orifice diameter,supply air pressure,air film thickness,orifice depth,air cavity thickness,and air cavity diameter on bearing performance was analyzed.Simulation and test were combined to validate the influence of design parameters on bearing performance.The results indicate that orifice diameter,air film thickness,supply air pressure,and air cavity diameter significantly affect the bearing·s load capacity,while orifice depth and air cavity thickness have a smaller impact.Parameters such as orifice diameter,supply air pressure,air cavity diameter,and air cavity thickness positively cor-relate with load capacity,whereas air film thickness and orifice depth negatively correlate.Additionally,aerostatic bearing with air cavity structures exhibits superior load capacity and stiffness compared to that without air cavities.The consistency between simulation results and test data confirms the reliability and accuracy of the proposed simulation model.
Keywords：Small orificeAir floatation matFinite element methodLoad-carrying capacityStiffness
Publication Date：2025-11-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 42-50 )