Theoretical and Experimental Studies on Valve-less Piezoelectric Pump with Variable Cross Section Arc-shaped Tubes

doi:10.3901/JME.2023.14.320

Abstract

Abstract: Coriolis force can promote or hinder the fluid flowing in the circular arc-shaped tubes. Simultaneously, combined with the nozzle/diffusers flow tube, a valve-less piezoelectric pump with variable cross section arc-shaped tubes (VPPVCSAT) is proposed. According to the flow characteristics of liquid in circular arc-shaped tubes, the velocity difference model of piezoelectric pump is established. Based on valve-less piezoelectric pump with arc-shaped tubes (VPPAT), the working principle of VPPVCSAT is expounded, and the pump flow equation is established. By using 3D printing technology, VPPAT and VPPVCSAT were made, and the experimental research was carried out. The experimental results show that, with the increase of voltage, the output flow of VPPAT and VPPVCSAT are increased. When the driving is 300 V_p-p and the driving frequency is 10 Hz, the output flow of VPPAT reaches the maximum value of 1.76 mL/min. While the driving is 300 V_p-p and the driving frequency is 14 Hz, the output flow of VPPVCSAT reaches the maximum value of 7.2 mL/min. Compared with VPPAT; the average output flow of VPPVCSAT is increased by 238%. The output flow of VPPVCSAT is increases with the increase of arc radius. The output flow is generated from the Coriolis force of the Earth’s rotation, and the rotational speed of the location of pump can be reflected by the amplitude of the flow. Therefore, local geographical information can be acquired by measuring the Earth’s rotational speed, forming a new principle of navigation.

Key words: valve-less, piezoelectric pump, variable cross section, arc-shaped tubes, flow

CLC Number:

TH35
TH38

YAN Qiufeng, SUN Wanting, WANG Hongmei. Theoretical and Experimental Studies on Valve-less Piezoelectric Pump with Variable Cross Section Arc-shaped Tubes[J]. Journal of Mechanical Engineering, 2023, 59(14): 320-327.

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