Abstract
In order to research the lubrication characteristics of various restrictors on the aerostatic bearing, an aerostatic bearing with the multi-hole integrated restrictor (MIR) was proposed in this paper. The gas film flow field at the orifice outlet of the MIR aerostatic bearing was numerically calculated and analyzed by using the numerical calculation method combined with the large eddy simulation and the over-relaxation iteration. The results showed that there was a pressure drop at the orifice outlet and the pressures were separated in the thickness direction of the gas film clearance, and the lubrication performance of the multi-hole integrated restrictor was better than that of the single-orifice restrictor. The fluctuation and micro-vibration of the flow field can be effectively reduced and suppressed by reasonably setting the parameter of the multi-hole integrated restrictor. It was proposed that the region near the orifice outlet of the MIR aerostatic bearing was divided into five regions to analyze and discuss the lubrication characteristics of the flow field, which provided a good means and method for further research the fluctuation and micro-vibration of the flow field at the orifice outlet.
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