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Micromachines 2015, 6(11), 1745-1754; doi:10.3390/mi6111452

The Structure of Wheel Check Valve Influence on Air Block Phenomenon of Piezoelectric Micro-Pump

School of Mechanical Science and Engineering, Jilin University, No. 5988, Renmin Road, Changchun 130025, China
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Academic Editors: Hiroshi Toshiyoshi and Nam-Trung Nguyen
Received: 3 August 2015 / Revised: 29 October 2015 / Accepted: 4 November 2015 / Published: 13 November 2015
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Abstract

To improve the stability and reliability of the piezoelectric micro-pump, the cause of air block phenomenon is analyzed on the structure of wheel check valve. During the movement of the bubble in the micro-channel, pressure drop occurs, the main factor which influences the bubble going through is opening height of the wheel check valve. Five groups of wheel check valves with different structures are used to test the wheel check valve opening height and air block probability. The experiment results show that reducing the wheel check valve thickness or diameter ratio can both increase the wheel check valve opening height, and decrease the air block probability. Through experiment, the optimum combination of the wheel check valve structure is obtained within the samples: as the thickness is 0.02 mm, the diameter ratio is 1.2, the wheel check valve opening height gets 252 µm, and within the given bubble volume, the air block probability is less than 2%. View Full-Text
Keywords: wheel check valve; air block; opening height; equivalent stiffness wheel check valve; air block; opening height; equivalent stiffness
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Chen, S.; Liu, Y.; Shen, Y.; Wang, J.; Yang, Z. The Structure of Wheel Check Valve Influence on Air Block Phenomenon of Piezoelectric Micro-Pump. Micromachines 2015, 6, 1745-1754.

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