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An improved resonantly driven piezoelectric gas pump

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Abstract

Piezoelectric pumps have the potential to be used in a variety of applications, such as in air circulation and compression. However, piezoelectric membrane pumps do not have enough driving capacity, and the heat induced during the direct contact between the driving part and the gas medium cannot be dissipated smoothly. When the gas is blocked, the piezoelectric vibrator generates heat quickly, which may eventually lead to damage. Resonantly driven piezoelectric stack pumps have high performance but no price advantage. In this situation, a novel, resonantly driven piezoelectric gas pump with annular bimorph as the driver is presented. In the study, the working principle of the novel pump was analyzed, the vibration mechanics model was determined, and the displacement amplified theory was studied. The outcome indicates that the displacement amplification factor is related with the original displacement provided by the piezoelectric bimorph. In addition, the displacement amplification effect is related to the stiffness of the spring lamination, adjustment spring, and piezoelectric vibrator, as well as to the systematic damping factor and the driving frequency. The experimental prototypes of the proposed pump were designed, and the displacement amplification effect and gas output performance were measured. At 70 V of sinusoidal AC driving voltage, the improved pump amplified the piezoelectric vibrator displacement by 4.2 times, the maximum gas output flow rate reached 1685 ml/min, and the temperature of the bimorph remained normal after 2000 hours of operation when the gas medium was blocked.

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Authors and Affiliations

  1. Mechanical Science and Engineering College, Jilin University, Jilin, China

    Yue Wu, Yong Liu, Jianfang Liu, Xiaoyang Jiao & Zhigang Yang

  2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China

    Long Wang

Authors
  1. Yue Wu
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  2. Yong Liu
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  3. Jianfang Liu
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  4. Long Wang
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  5. Xiaoyang Jiao
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  6. Zhigang Yang
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Corresponding author

Correspondence to Jianfang Liu.

Additional information

Recommended by Associate Editor Heung Soo Kim

Yue Wu was born in 1984 and received his M.S. degree from Jilin University, China. He is currently enrolled in the doctorate program of Jilin University. Mr. Wu’s research interest is in micromechanics.

Jianfang Liu was born in 1975 and received his doctorate degree in 2005 from Jilin University. Mr. Liu is an associate professor, and his primary research interests include precision mechanical drive technology as well as piezoelectric drive and control technology.

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Wu, Y., Liu, Y., Liu, J. et al. An improved resonantly driven piezoelectric gas pump. J Mech Sci Technol 27, 793–798 (2013). https://doi.org/10.1007/s12206-013-0125-8

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  • DOI: https://doi.org/10.1007/s12206-013-0125-8

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