| Author Name | Affiliation | | Shuangmin Li | School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China | | Congpeng Shao | School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China | | Haojie Xu | Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314000, Zhejiang, China | | Qi An | School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: |
| In the design of air foil bearings, nominal radial clearance is an important parameter that affects bearing performance. To analyze radial clearance influence on bearing lubrication and dynamic performance, a mechanical model that simplifies the foil structure as a two-dimensional thin plate finite element model with an elastic support is established using the theory of elasticity. The calculation model comprehensively considers the interactive forces of bumps and the frictions between the top foil and bump foil, as well as between the bump foil and bearing bushing. A flow-solid coupling calculation model is established based on the compressible gas Reynolds equation. By using perturbation methods, the calculation model for bearing dynamic performance is established. The reliability of the model is verified through experiments measuring the friction torque of the bearing. Through a specific case study, the influences of radial clearance and rotational speed on lubrication and dynamic performance are calculated. In addition, the influence of the foil's structural parameters on bearing performances is also studied. |
| Key words: air foil bearing radial clearance fluid-solid coupling lubrication performances dynamic performances |
| DOI：10.11916/j.issn.1005-9113.24049 |
| Clc Number:TH133.35； TH117.2 |
| Fund: |
