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Volume 13
Issue 9
10.3390/machines13090752
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Performance Investigation of Micro-Orifice Restricted High-Speed Aerostatic Journal Bearings Based on the Finite Element Method

by
Siyu Gao
1,2,
Zhuang Li
1,
Tianle Jiang
1,
Hongbin Yang
1,
Laiyun Song
3,*,
Min Zhu
4,*,
Jiaheng Yin
1,
Lihua Lu
1,
Qiang Gao
1 and
Hanqian Zhang
5
1
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
2
Chongqing Research Institute of HIT, Chongqing 401121, China
3
Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
4
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
5
Guangzhou Haozhi Industrial Co., Ltd., Guangzhou 511356, China
*
Authors to whom correspondence should be addressed.
Machines 2025, 13(9), 752; https://doi.org/10.3390/machines13090752
Submission received: 11 July 2025 / Revised: 18 August 2025 / Accepted: 21 August 2025 / Published: 22 August 2025
(This article belongs to the Special Issue Advances in Bearing Modeling, Fault Diagnosis, RUL Prediction (2nd Edition))
Versions Notes

Abstract

Advancements in manufacturing technology have facilitated the use of micro-orifice restrictors (MORs) in aerostatic bearings. However, the understanding of their effectiveness in journal bearings remains limited. This study utilizes FEM for solving the nonlinear Reynolds equation, incorporating velocity terms, to analyze the characteristics of aerostatic journal bearings (AJBs). The concepts of air impedance and pressure range are introduced and applied to explain the advantages of MORs over traditional orifice restrictors (TORs). Furthermore, the centrifugal deformation of the air film induced by high-speed operations and its consequential impact on bearing performance are methodically examined in detail. Finally, an experimental study is executed to confirm the proposed model and support the pertinent design principles. The experiment indicates that the air film thickness, accounting for centrifugal deformation, aligns more closely with the high-speed operating conditions characteristic of AJBs.
Keywords: micro-orifice restrictors; aerostatic journal bearings; air impedance; centrifugal deformation micro-orifice restrictors; aerostatic journal bearings; air impedance; centrifugal deformation

Share and Cite

MDPI and ACS Style

Gao, S.; Li, Z.; Jiang, T.; Yang, H.; Song, L.; Zhu, M.; Yin, J.; Lu, L.; Gao, Q.; Zhang, H. Performance Investigation of Micro-Orifice Restricted High-Speed Aerostatic Journal Bearings Based on the Finite Element Method. Machines 2025, 13, 752. https://doi.org/10.3390/machines13090752

AMA Style

Gao S, Li Z, Jiang T, Yang H, Song L, Zhu M, Yin J, Lu L, Gao Q, Zhang H. Performance Investigation of Micro-Orifice Restricted High-Speed Aerostatic Journal Bearings Based on the Finite Element Method. Machines. 2025; 13(9):752. https://doi.org/10.3390/machines13090752

Chicago/Turabian Style

Gao, Siyu, Zhuang Li, Tianle Jiang, Hongbin Yang, Laiyun Song, Min Zhu, Jiaheng Yin, Lihua Lu, Qiang Gao, and Hanqian Zhang. 2025. "Performance Investigation of Micro-Orifice Restricted High-Speed Aerostatic Journal Bearings Based on the Finite Element Method" Machines 13, no. 9: 752. https://doi.org/10.3390/machines13090752

APA Style

Gao, S., Li, Z., Jiang, T., Yang, H., Song, L., Zhu, M., Yin, J., Lu, L., Gao, Q., & Zhang, H. (2025). Performance Investigation of Micro-Orifice Restricted High-Speed Aerostatic Journal Bearings Based on the Finite Element Method. Machines, 13(9), 752. https://doi.org/10.3390/machines13090752

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