Abstract A novel flexure pivot tilting pad squeeze film air bearing (FPTP-SFAB) based on near-field acoustic levitation (NFAL) for a rotor is proposed in this article. The most important advantage of this structure is the suitability of the bearing for high-speed and light load conditions because the FPTP can adapt well to squeeze action during operation. The rotating orbit of the rotor can be adjusted according to the machining conditions. A theoretical model is employed to analyze the running characteristics of the rotor by using the coupled NFAL and FPTP model. Experiments were conducted to investigate the running performance of the rotor–bearing system. Moreover, the effects of input voltage, rotational speed, eccentricity ratio, radial clearance, vibration amplitude, and installation method on bearing performance were analyzed. Numerical and experimental results show that a rotor supported by the FPTP-SFAB with a reasonable input excitation magnitude can effectively adjust the rotating orbit of the rotor and inhibit the divergence of the rotor vibration amplitude, thus improving the stability of the rotor–bearing system under complicated and alternating machining conditions.

中文翻译：

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带挠性枢轴可倾瓦块的挤压薄膜空气轴承的运行性能

摘要 本文提出了一种基于近场声悬浮 (NFAL) 的转子挠性枢轴可倾瓦挤压油膜空气轴承 (FPTP-SFAB)。这种结构最重要的优点是轴承适用于高速和轻载条件，因为 FPTP 可以很好地适应运行过程中的挤压作用。转子的旋转轨道可根据加工条件进行调整。结合NFAL和FPTP模型，建立了理论模型对转子的运行特性进行分析。进行了实验以研究转子-轴承系统的运行性能。此外，还分析了输入电压、转速、偏心比、径向游隙、振动幅度和安装方法对轴承性能的影响。