半圆柱阻流体锥形腔无阀压电泵

Valveless Piezoelectric Pump with Semi-Cylinder Bluff-Bodies in Conical Cavity

为了提高半圆柱阻流体无阀压电泵的流量,结合锥形腔的流阻不等特性,该文设计了一种半圆柱阻流体锥形腔无阀压电泵,并建立了其流量的理论公式。数值模拟了该泵的泵腔流速分布,对比分析了其与半圆柱阻流体无阀压电泵的阻力特性。模拟结果表明,半圆柱阻流体锥形腔无阀压电泵能实现流体的单向输送,且其输送能力优于半圆柱阻流体无阀压电泵。制作了两种泵的样机并进行了流量和压力差试验。试验结果表明,在驱动电压220 V下,半圆柱阻流体锥形腔无阀压电泵的最高流量和压力差分别为30.96 g/min和394 Pa,与半圆柱阻流体无阀压电泵相比,其流量和压力差均得到提高。

To improve the flow rate of the valveless piezoelectric pump with semi-cylinder bluff-bodies,combined with the unequal flow resistance characteristic of conical cavity,a valveless piezoelectric pump with semi-cylinder bluff-bodies in a conical cavity was designed in this paper,and the theoretical formula of its flow rate was established.The flow velocity distribution of pump cavity was simulated numerically.The resistance characteristics of this pump and the valveless piezoelectric pump with semi-cylinder bluff-bodies were compared.The simulation results show that the valveless piezoelectric pump with semi-cylinder bluff-bodies in a conical cavity can achieve unidirectional fluid transportation,and its transportation capacity is better than that of the valveless piezoelectric pump with semi-cylinder bluff-bodies.The prototypes of two pumps were made,and the flow rate and pressure difference tests were conducted.The experimental results show that under 220 V driving voltage,the maximum flow rate and pressure difference of the valveless piezoelectric pump with semi-cylinder bluff-bodies in a conical cavity are 30.96 g/min and 394 Pa,respectively.Compared with the valveless piezoelectric pump with semi-cylinder bluff-bodies,both the flow rate and pressure difference have been improved.