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Fluid–structure interaction analysis of the influences of structural parameters on the dynamic properties of aerostatic journal bearing

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Abstract

One of the outstanding advantages of aerostatic bearing is high speed, which is the basic component for various ultra-precision machining. Compared with thrust bearing, journal bearing is less studied and more complex. Structural parameters have great influences on the static properties of the bearing. However, due to the strong coupling, the study of the structural parameters on the bearing dynamic properties at high speed is insufficient. The fluid–structure interaction model of the bearing is formed by directly combining the pressure distribution equations of the gas film, the spindle motion equation, and the flow balance equations. The coupled equations are numerically solved using the two-way alternating implicit scheme method, the Newton iteration method, the Thomas algorithm, and the Newmark method. The influences of orifice diameter, bearing clearance, recess length, and recess height on the dynamic properties of the system are investigated. The results show that the structural parameters play a prominent influence on the bearing flow field and the spindle motion. With the change of the structural parameters, the system appears as T-periodic motion, multiple T-periodic motion, and quasi-periodic motion. The research contributes to the structural optimization and performance enhancement of aerostatic journal bearing.

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Funding

This work was supported by the Ministry of Industry and Information Technology High Quality Development Special Project (Grant No. 2023ZY01041-7).

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Lei An, Wei Wang & Chaoqun Wang

  2. Sichuan Precision and Ultra-Precision Machining Engineering Technology Center, Chengdu, 610200, China

    Yueqing Zheng

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  1. Lei An
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  2. Wei Wang
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Correspondence to Wei Wang.

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An, L., Wang, W., Wang, C. et al. Fluid–structure interaction analysis of the influences of structural parameters on the dynamic properties of aerostatic journal bearing. Nonlinear Dyn (2024). https://doi.org/10.1007/s11071-024-09643-3

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