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2013 (Vol. 5, Issue: 24)
Article Information:

High Frequency Character of Piezoelectric Pump Valve

Yue Wu, Zhigang Yang and Yong Liu
Corresponding Author:  Yue Wu 

Key words:  Check valve, dynamic mode, kinetic pressure, piezoelectric pump, working principle, ,
Vol. 5 , (24): 5521-5526
Submitted Accepted Published
September 15, 2012 October 24, 2012 May 30, 2013
Abstract:

In order to improve the performance of piezoelectric pump, research its check valve, find the interpretation of the incomplete closure of piezoelectric pump check valve in high frequency, analysis the characteristic of the pump in these conditions; give the judgment basis and theoretical demonstration of the existence for the phenomenon. Frequency response of the check valve in water is obtained from its dynamic model. Sufficient condition for the check valve incomplete closure was obtained which is amplitude amplification less than 0.25. Amplitude amplification factor in different frequency was calculated. The results showed that check valve can close completely operating at 80Hz, the incomplete closure phenomenon was observed at 140Hz. With further increasing of the frequency, amplitude amplification factor decreases, the phenomenon is more obvious under the condition of low amplitude amplification factor, the minimum clearance between the check valve and valve seat more than 30μm at 160Hz. The theoretical analysis results are verified, that the critical frequency can be used as the yardstick for working state of check valve in piezoelectric pump.
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  Cite this Reference:
Yue Wu, Zhigang Yang and Yong Liu, 2013. High Frequency Character of Piezoelectric Pump Valve.  Research Journal of Applied Sciences, Engineering and Technology, 5(24): 5521-5526.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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