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Volume 14
Issue 5
10.3390/act14050227
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Article

Research on Active Lubrication Based on Piezoelectric Micropump

by
Zhiyuan Zhang
1,
Yan Zhao
1,
Long Lin
2,
Yamen Wang
1,
Xiuxin Shang
1 and
Kai Li
1,3,*
1
Henan Key Laboratory of High—Performance Bearings, Luoyang 471039, China
2
School of Mechanical and Automotive Engineering, Qilu University of Technology, Jinan 250316, China
3
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Actuators 2025, 14(5), 227; https://doi.org/10.3390/act14050227
Submission received: 5 April 2025 / Revised: 28 April 2025 / Accepted: 1 May 2025 / Published: 2 May 2025
(This article belongs to the Special Issue Piezoelectric Ultrasonic Actuators and Motors)
Versions Notes

Abstract

This paper mainly introduces the problem of active lubrication. At present, the technology of active lubrication for bearings in micro-space is not mature, and it is difficult to meet the requirements of micro-space lubrication. A piezoelectric micropump for active lubrication is proposed in this paper. The micropump has the advantages of compactness, embedding, high precision, and fast response. We analyze the performance of the micropump under different characteristics. When the applied frequency is 9.95 kHz, the voltage is 200 V and the oil viscosity is 0.001 Pa·s, and the pumping capacity can reach 0.8 μL. When the same excitation signal is used, the experimental pumping capacity reaches 0.76 μL. The theoretical and experimental error is 5.3%. For different bearing conditions, combined with the theoretical model of minimum oil film thickness, we propose the number of pulses to meet the micro-redundancy lubrication under different working conditions. These analyses provide a theoretical basis for active lubrication in micro-space.
Keywords: piezoelectric micropump; initiative lubrication; accuracy control; bearing piezoelectric micropump; initiative lubrication; accuracy control; bearing

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MDPI and ACS Style

Zhang, Z.; Zhao, Y.; Lin, L.; Wang, Y.; Shang, X.; Li, K. Research on Active Lubrication Based on Piezoelectric Micropump. Actuators 2025, 14, 227. https://doi.org/10.3390/act14050227

AMA Style

Zhang Z, Zhao Y, Lin L, Wang Y, Shang X, Li K. Research on Active Lubrication Based on Piezoelectric Micropump. Actuators. 2025; 14(5):227. https://doi.org/10.3390/act14050227

Chicago/Turabian Style

Zhang, Zhiyuan, Yan Zhao, Long Lin, Yamen Wang, Xiuxin Shang, and Kai Li. 2025. "Research on Active Lubrication Based on Piezoelectric Micropump" Actuators 14, no. 5: 227. https://doi.org/10.3390/act14050227

APA Style

Zhang, Z., Zhao, Y., Lin, L., Wang, Y., Shang, X., & Li, K. (2025). Research on Active Lubrication Based on Piezoelectric Micropump. Actuators, 14(5), 227. https://doi.org/10.3390/act14050227

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