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Research Article | Open Access

Theoretical and experimental research on static stiffness, performance, and lift-off characteristics of multi-layer gas foil thrust bearings

Yang HU1( ), Pengjing DING1, Fangling WU1, Xiaojing WANG1, Bo LIANG2, Yonggang MENG3
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing Engineering Institute of Aircraft Systems, Nanjing 211106, China
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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Abstract

In this study, a new comprehensive fully coupled elastic–hydrodynamic model is developed for a multi-layer gas foil thrust bearing (GFTB). The interaction effects among the top foil, back board, middle foil, and bottom foil, as well as the Coulomb friction effect, are considered. The stiffness and static characteristics obtained by the experimental and theoretical approaches are in good agreement, which verifies the accuracy of the model. The contribution of each foil layer to the overall stiffness and the load-carrying mechanism are analyzed. Interaction effects of the load, preload, and rotational speed on the static performance are investigated comprehensively. Furthermore, start–stop tests are performed to achieve the lift-off speed, start-up torque, and shut-down torque under various operating conditions.

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Keywords

multi-layergas foil thrust bearing (GFTB)load carrying mechanismstatic performance

References

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Friction
Volume 12 Issue 11,
November 2024
Pages 2458-2479
DOI: 10.1007/s40544-024-0889-0

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HU Y, DING P, WU F, et al. Theoretical and experimental research on static stiffness, performance, and lift-off characteristics of multi-layer gas foil thrust bearings. Friction, 2024, 12(11): 2458-2479. https://doi.org/10.1007/s40544-024-0889-0

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Received: 25 September 2023
Revised: 19 December 2023
Accepted: 03 March 2024
Published: 22 June 2024
© The author(s) 2024.

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