Abstract
With compliant foil structure, bump-foil bearing, one type of foil-air bearing, has been widely applied in high-speed machines thanks to oil-free operation. In this paper, two types of experiment have been implemented to study dynamic behaviour of this foil bearing. Before that, one bump-foil bearing structure was manufactured with two kinds of material: the foil structure made of stainless steel 304 with 0.1-mm thickness and the bearing body made of stainless steel CT3. Static-shaft experiment was deployed to compute the nominal stiffness of the foil structure through load–displacement relationships. The data shows the same tendency with computed results from a mathematical model of foil structure proposed in the previous research. Differences can be reasoned by manufacturing error. Moreover, through rotating-shaft experiment, air thin film is proved to appear inside the bearing, and aerodynamic pressure bears a significant influence from rotating speed. The study demonstrates important meanings in confirming the theoretical model of foil structure and shaft-bearing system.
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Nguyen, MQ., Pham, MH. (2023). Experimental Study on the Dynamic Response of a First-Generation Bump-Foil Bearing. In: Long, B.T., et al. Proceedings of the 3rd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2022). MMMS 2022. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-31824-5_23
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DOI: https://doi.org/10.1007/978-3-031-31824-5_23
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