Abstract
The valveless piezoelectric pump delivers fluid based on the difference of flow resistance of internal tube. In this paper, a vortex diode with conical tangential tube is proposed, which possesses the great characteristic of reverse cut-off, and the analysis of the forward and reverse flow resistance of the conical vortex diode is verified by finite element analysis. Then, a valveless piezoelectric pump with conical vortex diodes as the internal channel is designed, and the prototype is manufactured. The results of the output performance experiment show that the maximum output flow rate of the valveless piezoelectric pump is 10.44 g/min at the drive frequency of 45Hz, and the maximum output pressure is 560 Pa at the drive frequency of 35Hz. The proposal of the valveless piezoelectric pump provides a good reference for more new types of valveless piezoelectric pumps.
Highlights
Valveless piezoelectric pumps driven by the inverse piezoelectric effect of piezoelectric materials has the advantages of simple structure, high reliability and miniaturization, which is widely applied in cell transmission, fuel cell and chip cooling.[1,2,3] Valveless piezoelectric pumps mostly utilize flow resistance differential tube to replace the valve
The forward and reverse flow resistances of the conical vortex diode are calculated by finite element simulation
The prototype of the valveless piezoelectric pump with conical vortex diodes is manufactured by Stereo lithography Apparatus (SLA) technology
Summary
Valveless piezoelectric pumps driven by the inverse piezoelectric effect of piezoelectric materials has the advantages of simple structure, high reliability and miniaturization, which is widely applied in cell transmission, fuel cell and chip cooling.[1,2,3] Valveless piezoelectric pumps mostly utilize flow resistance differential tube to replace the valve. As a kind of flow resistance differential tube, the vortex diode has no mechanical moving parts and is adopted for fluid transmission. Due to the characteristic of unequal flow resistances in forward and reverse, the vortex diode is utilized in the transportation of nuclear industry, chemical industry and pharmaceutical industries [8,9]. In this paper, applying the flow resistance characteristics of the diffuser/nozzle tube to the design of a vortex diode, the new vortex diodes with conical tangential tubes are proposed. The forward and reverse flow resistances of the conical vortex diode are calculated by finite element simulation. The output performance experiment of the valveless piezoelectric pump with conical vortex diodes are carried out to verify the effectiveness of the design scheme
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