LAUSR

Abstract This study proposes a novel squeeze-film air bearing based on near-field acoustic levitation technology. Unlike previous squeeze-film bearings, the new bearing employs flexure pivot-tilting pads as vibration surfaces and provides higher vibration amplitude and better stability for rotor systems. The flexure pad structure eases processing and adapts well to squeeze action. This paper presents a theoretical model of the new bearing that combines models for squeeze film and flexure pivot-tilting pads to study the float characteristics. Resonant frequency and vibration mode of the bearing were obtained by using finite element modelling and validated by experimental results. The authors investigated the mechanism of pressure generation of squeeze film and pad movement. The load carrying capacity of the bearing was experimentally investigated. Numerical and experimental results show that the proposed bearing is a feasible non-contact bearing for high-speed and high-precision rotating machineries.