Influence of disc parameters on output performance of elastic valve piezoelectric pump
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TECHNICAL PAPER
Influence of disc parameters on output performance of elastic valve piezoelectric pump Weiqing Huang1 • Liyi Lai1 Qibo Bao1 • Jianhui Zhang1
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Xiaosheng Chen1 • Zhenlin Chen1 • Zhi Huang1 • Ming Tang1
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Received: 20 September 2020 / Accepted: 19 October 2020 Ó Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In order to improve the output performance of the elastic valve piezoelectric pump, the relationship between the output performance and the disc parameters was studied. Firstly, the structure and working principle of the elastic valve piezoelectric pump were introduced. Secondly, by analyzing the flow resistance of the discs, the flow rate equation of the piezoelectric pump was derived. Finally, the influence of the geometric parameters of the discs on the flow rate was studied through several experiments. The results show that the pump can realize the free transition between valved state and valveless state by adjusting the frequency. When the initial angle is 12°, the length is 5 mm and the height is 1.9 mm, the maximum flow rate of the pump can reach 78 mL/min. Reducing the length, increasing the height, or choosing the proper initial angle can increase the flow rate. Because the pump can realize the self-adaptive transformation of valved and valveless according to the vibrator driving frequency, the application field of the piezoelectric pump can be expanded.
1 Introduction With the advantages of compact structure and precision of controlling flow, the micro-pump has been widely used in numerous fields, such as healthcare, electronic cooling, etc. The volumetric piezoelectric pump is a new type of micropump, which is driven by piezoelectricity. By using the inverse piezoelectric effect (the electric energy converts to mechanical energy), the fluid in the micro-pump can be driven by the micro-vibration. Due to the fluid flowing the micro-structure into the pump with different flow resistances in forward and reversed directions, the fluid flows in the unidirection macroscopically is realized. At present, the researches in the volumetric piezoelectric pump are mainly focused on two aspects: the volume variation (Wang et al. 2016, 2019) and the flow resistance mechanism (Bian et al. 2020; Huang et al. 2019b; Munas et al. 2018). Generally, researchers use piezoelectric stack and displacement amplification structure to change the pumps’ volume. While the research on flow resistance mechanism is aimed at the design of valve body, including moving-part & Jianhui Zhang [email protected] 1
School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China
valves and no-moving-part valves. The moving-part valves contain ball valve (Wu and Lai 2012), overall opening valve (Zeng et al. 2006), cantilever valve (Woo et al. 2020) and umbrella-shaped valve (Peng et al. 2019), et al., all of which are found in valved piezoelectric pumps. And there are various types of no-moving-part valves, such as diffuser/nozzle
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