Theoretical Predictions and Experimental Measurements of Novel Aerostatic Bearing with Multi-Inclined-orifice Restrictors for the Improvement of Stability

This paper introduces a novel design featuring a multiple-inclined-orifice restrictor (MIOR) to address the challenge of turbulent vortices and the reduction of nano-vibrations in aerostatic bearings. This design optimizes the angle configuration to alter the dynamic airflow patterns within the chamber, suppress turbulent vortices, and mitigate nano-vibrations. Three-dimensional transient vortical structures, pressure fluctuation, and dynamic load-carrying capacity of aerostatic bearings with varying orifice angles were investigated through large eddy simulations. Additionally, load-carrying capacity and vibration tests were conducted on aerostatic bearings equipped with MIORs to validate the proposed model's accuracy and assess the effectiveness of MIOR. Remarkably, the experimental results were consistent with the simulation results, highlighting the exceptional stability and reduced vibration amplitude exhibited by MIORs with an angle of 110° while maintaining static performance.