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| Experimental and Research on Fish-Tail-Shaped Obstacle Fluid Valveless Piezoelectric Pump |
| ZHAO Yejing1, JIE Meng1*, CAI Lutong1, ZHANG Fei1,SUN Zhi1, YAO Xiaofeng2*
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| 1.School of Mechanical and Electrical Engineering, Jilin University of Chemical Technology, Jilin City 132022；2.China Energy Investment Corporation Jilin South Bank of Songhua River Cogeneration Company Limited，Jilin Jilin 132013 |
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Abstract To reduce backflow and improve the output flow rate of the valveless piezoelectric pump, this paper develops a structure resembling a fish tail shape, which increases the resistance to backflow through an internal built-in flow-blocking structure. This special design promotes liquid flow, reduces backflow, and imparts unidirectional flow characteristics. The influence of key parameters of the fish-tail-shaped flow-blocking structure in the pump on the output flow rate is analyzed, and a theoretical formula for the flow rate is established. The velocity and pressure distributions within the pump chamber are simulated, and the simulation results verify that this structure effectively suppresses backflow in the valveless piezoelectric pump. A series of prototypes are fabricated to test the flow rate and output pressure of this valveless piezoelectric pump. By comparing the experimental results, the optimal parameters for the fish-tail-shaped pump are determined. The research findings indicate that the fish-tail-shaped flow-blocking valveless piezoelectric pump can achieve unidirectional fluid transport. The pumping performance is optimal when the included angle (α angle) of the fish-tail-shaped flow-blocking structure is 120°. At a driving voltage of 300?V and a driving frequency of 18?Hz, the maximum output flow rate is 38.85?mL/min. At a driving voltage of 300?V and a driving frequency of 9?Hz, the maximum output pressure is 460Pa.
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Published: 11 July 2026
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