Design and Experiment of Streamlined Piezoelectric Pump with Low Vortex and Large Flow Rate

低漩涡大流量流线型流管无阀压电泵的设计与实验

Valveless piezoelectric pump is widely used in the medical,however,there is a general and difficult problem to be solved:Low vortex and large flow rate are not compatible,resulting in the blood prone to thrombosis during blood delivery.In this paper,a new valveless piezoelectric(PZT)pump with streamlined flow tubes(streamlined pump)is proposed.The design method and the working principle of the pump are analyzed.The velocity streamlines are simulated,and the results demonstrate that there are no obvious vortexes in the flow tube of the streamlined pump.Five prototype pumps(two cone pumps and three streamlined pumps)are designed and fabricated to perform flow rate and flow resistance experiments.The experimental results illustrate that the maximum flow rate of the streamlined pump is 142 mL/min,which is 179%higher than that of the cone piezoelectric pump,demonstrating that the streamlined pump has a large flow rate performance.This research provides an inspiration for future research on simple structure,low vortex and large flow rate volume-type pumps,and also provides a useful solution for thrombosis preventing.

无阀式压电泵在医学上应用广泛,但存在着低涡流、大流量不兼容问题,在输送血液过程中产生血栓形成,是一个亟待解决的难题。本文提出了一种流线型流管无阀压电泵(流线型泵)。分析了该泵的设计方法和工作原理。仿真结果表明,流线型泵的流管内不存在明显的漩涡。设计和制造了5个压电泵泵,用于进行流量和流阻实验。实验结果表明,流线型泵的最大流量为142 mL/min,比锥形流管无阀压电泵的最大流量高179%,说明流线型泵具有更好的泵送性能。本研究为今后研究结构简单、低涡流、大流量压电泵提供了启示,也为预防血栓形成提供了有效的解决方案。