圆弧形流管无阀压电泵的工作原理及试验
Working Principle and Experimental Verification of Valv-less Piezoelectric Pump with Arc-Shaped Tube

圆弧形管路中的液体在压电元件的作用下产生流动，受到离心力和哥氏力的作用。利用上述现象提出了圆弧形流管阀压电泵，通过压电元件的逆压电效应使泵腔容积产生周期性变化，利用地球自转对流管中流体的影响，使流体顺时针和逆时针两种流动状态的流阻不同，形成流体宏观单向流动。对原理样机进行的压差试验表明：驱动电压保持为130 V不变，当驱动频率为14 Hz时，压差达到最大值为17 mm水柱；当驱动频率为30 Hz时，压差降至3 mm水柱。压差的产生源于地球自转的哥氏力，流量或压差的大小能够反映泵结构整体的旋转速度，可望通过地球转速的测量，获得本地地理位置信息，形成导航新原理。
The fluid is flowed through the action of the piezoelectric element in the arc-shaped curved pipe, affected by the centrifugal force and Coriolis force. According to this phenomenon, a valveless piezoelectric pump with an arc-shaped tube is developed. Based on the inverse piezoelectric effect of the piezoelectric element, the volume of the pump chamber periodically changes. Due to the Earth′s rotation, the flow resistance of the fluid differs between the clockwise and counterclockwise flow status, and thus a macro one-way flow is formed. The differential pressure test of the prototype shows that when the driving voltage is 130 V and the driving frequency is 14 Hz, the pressure drop reaches the maximum value of 17 mm H20, whilewhen the driving frequency is 30 Hz, the pressure drop is reduced to 3 mm H20. The pressure drop is generated from the Coriolis force of the Earth′s rotation, and the rotational speed of the overall structure of the pump can be reflected by the amplitude of the flow or the differential pressure. Therefore, local geographical information can be acquired by measuring the Earth′s rotational speed, forming a new principle of navigation.