电磁驱动主动阀压电泵的设计及其性能

提出并设计了一种新型的主动阀压电泵。与被动阀压电泵通过流体流动开启阀片方式不同,该泵通过电磁驱动方式控制压电泵的进出口阀的开启、关闭,从而降低了阀在开启、关闭时压电泵腔内流体的能量损失。同时可以根据压电泵工作性能的需要,通过调整控制信号的占空比和相位控制阀的开启、关闭时间,这不仅可实现单一机械结构下对液体泵送方向的主动控制,而且对于流体的流量也可进行控制,为提高压电泵的性能提供了一种新的手段。试验表明:该泵在30 Hz的条件下工作时,最大输出流量为160 mL/min。

Piezoelectric pump with active electromagnetic driven valve

A new type of piezoelectric pump with active electromagnetic driven valve was developed. Compared with the piezoelectric pump with the passive valve which is opened by the flowing fluid,the valve of this pump is opened by the electromagnetic force,so can save the energy consumption of fluid inside the piezoelectric pump chamber when the valve works.Moreover,according to the requirements of working condition,the value timing can be controlled by adjusting the duty cycle and phase of the control signal of the valve.This makes the pump not only be able to pump the liquid forward and backward actively,but also to control the flow rate accurately,which provides a new approach of improvement of the piezoelectric pump performance.The experimental results show that the maximum flow rate of the pump was 160 mL/min at frequency 30 Hz.