Research on a Piezoelectric Pump with Flexible Valves

Huang, Weiqing; Lai, Liyi; Chen, Zhenlin; Chen, Xiaosheng; Huang, Zhi Xiang; Dai, Jietao; Zhang, Fan; Zhang, Jianhui

doi:10.3390/app11072909

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…7,8 The bionic type has an imitation fishtail type and built-in compliant structure. [9][10][11] Regardless of the structural form, the primary concern is how to maximize the positive and negative flow difference. In this article, through the simulation and comparison of the previous hemispherical and imitations of meniscus resistance fluids, it is found that the forward and backward flow resistance difference of the two fluids is small, and the output capacity of one-way flow is not enough.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the characteristics of valveless piezoelectric pump with crescent dune bluff body

Xie,

Zhou,

Zhang

et al. 2023

Science Progress

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To improve the output flow characteristics of the piezoelectric pump in one direction, a new valveless piezoelectric pump with a crescent dune bluff body has been proposed. The pump can achieve low damage to the active substance on the premise that the active cell can guarantee the transport volume. By comparing with the hemispherically deficient and imitated meniscus resistance fluid, the barchan dune resistance fluid which can effectively improve the unidirectional output of the piezoelectric pump is obtained. Combined with the pump theoretical flow calculation formula, these influencing parameters, the degree of inclination, the sand ridge radius and the order of the crescent dune were analyzed. Finally, an experimental prototype of a valveless piezoelectric pump has been fabricated by 3D printing technology, and the pump flow test is being conducted. The relationship between frequency, voltage and output flow has been obtained. The test results show that with a dune inclination of 37.5, a sand ridge radius of 6.75 mm and a dune order of 4, the flow rate of the piezoelectric pump is best at 194.7 mL/min. The experimental results agree with the simulation results, showing the effectiveness of the valveless piezoelectric pump structure.

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Section: Introductionmentioning

confidence: 99%

Analysis of the characteristics of valveless piezoelectric pump with crescent dune bluff body

Xie,

Zhou,

Zhang

et al. 2023

Science Progress

View full text Add to dashboard Cite

show abstract

“…However, the problems of high processing difficulty and the bulky shape of the two forms are obvious. Other forms, such as the flexible film valve [ 29 ], cymbal-shaped slotted valve [ 30 ], and venous imitation valve, have also been presented [ 31 , 32 ]. Moreover, the poor precision of the valve body and the insufficient cut-off are their common shortcomings.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Inlet Pump with a Simple Valves System

Wang,

Liu,

Wang

et al. 2023

Micromachines

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To ameliorate the deficient output flow performance of the piezoelectric pumps with cantilever valves, a dual-inlet pump with a simple valves system is proposed. On the basis of explaining the structure design of the prototype, the working principle of the prototype is explained, and the output flow is theoretically analyzed. Then, the manufacturing process of the prototype is introduced. The general operating frequency of the pump was obtained by combining the finite element analysis of the piezoelectric actuator under dry and wet modes with the mechanical vibration test, and a series of measured flow rates were compared and improved through valve stiffness optimization and pump chamber height adjustment in the subsequent control experiment. The proposed piezoelectric pump achieves a maximum flow rate of 33.18 mL/min at a 180 Vp-p voltage with the driving frequency of 100 Hz, which may bring new inspiration for the application of small intelligent pumps in the field of microfluidics.

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“…Nevertheless, valve piezoelectric pumps and valve-less piezoelectric pumps still have some limitations, which hinder their popularization and application. On the basis of the principle that the structure of cardiac valves prevents the blood from flowing back, a kind of piezoelectric pump with cardiac-valve-like structures (PPCVLS) was proposed in our previous study [ 29 , 30 ]. The working conditions of valve-based and valve-less pumps can be converted by only changing the driving voltage.…”

Section: Introductionmentioning

confidence: 99%

Working Mechanisms and Experimental Research of Piezoelectric Pump with a Cardiac Valve-like Structure

Zhou

Sun²,

Fu³

et al. 2022

Micromachines

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In this study, based on the working principle of the cardiac valve structure that prevents blood from flowing back, a piezoelectric pump with a cardiac valve-like structure (PPCVLS) is designed. The operating principles of cardiac-valve-like structures (CVLSs) are introduced. Furthermore, the closure conditions of the CVLSs on both sides of the flow channel are explored. The principle behind the working-state conversion between “valve-based” and “valve-less” of PPCVLS is also analyzed. A high-speed dynamic microscopic image-analysis system was utilized to observe and verify the working-state conversion between “valve-based” and “valve-less” PPCVLSs. The resonant frequency of the piezoelectric pump was measured by Doppler laser vibrometer, and the optimal working frequency of the piezoelectric vibrator was determined as 22.35 Hz. The prototype piezoelectric pump was fabricated by the 3D printing technique, and the output performance of the piezoelectric pump was also evaluated. The experimental results show that the piezoelectric pump is valve-based when the driving voltage is greater than 140V, and the piezoelectric pump is valve-less when the driving voltage is less than 140 V. Furthermore, the maximum output pressure of the piezoelectric pump was 199 mm H2O when driven by the applied voltage of 220 V at 7 Hz, while the maximum flow rate of the piezoelectric pump was 44.5 mL/min when driven by the applied voltage of 220 V at 11 Hz.

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Research on a Piezoelectric Pump with Flexible Valves

Cited by 7 publications

References 16 publications

Analysis of the characteristics of valveless piezoelectric pump with crescent dune bluff body

Analysis of the characteristics of valveless piezoelectric pump with crescent dune bluff body

A Dual-Inlet Pump with a Simple Valves System

Working Mechanisms and Experimental Research of Piezoelectric Pump with a Cardiac Valve-like Structure

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