Abstract
Aerostatic porous bearing is a new supporting structure gradually used in ultra-precision machine tools. Considering the relatively lower Young's modulus of porous, there are few references about the effect of deformation. Here, the deformation of porous thrust bearings is numerically and experimentally analyzed. The fluid-solid interaction method is proposed with the governing equations. The permeability of the porous is obtained by the experiment for accurate simulation. The effect of supply air pressure, material thickness, and Young's modulus are studied on the porous deformation and the bearing static performance. The simulation results were verified by the experiment. Finally, a double-layered porous restrictor is proposed to suppress deformation and the various thickness combinations of double layers are also discussed.
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