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

Zhou, Jie; Sun, Wanting; Fu, Jun; Liu, Huixia; Wang, Hongmei; Yan, Qiufeng

doi:10.3390/mi13101621

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…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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Section: Introductionmentioning

confidence: 99%

A Dual-Inlet Pump with a Simple Valves System

Wang,

Liu,

Wang

et al. 2023

Micromachines

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Research of piezoelectric pump with a vortex linear valve structure

Yan,

Sun

2023

Physics of Fluids

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In this article, a piezoelectric pump with vortex shaped linear valve structure (PPVSLVS) is proposed on the basis of characteristics of flexible materials. Changes in the working state conversion between “valve-based” and “valve-less” of the PPVSLVS can be realized by adjusting driving conditions. The principle of the working state conversion between “valve-based” and “valve-less” of the PPVSLVS is elaborated for the design of the structure of the PPVSLVS. The prototype of the PPVSLVS and the piezoelectric pump with cardiac valve-like structure is fabricated by 3D printing technique, and the corresponding experiments are also conducted. The experimental results demonstrate that the PPVSLVS is ascribed to be a valve-less piezoelectric pump when the driving voltage is less than 140 V, while the PPVSLVS is ascribed to be a valve-based piezoelectric pump when the driving voltage is above 140 V. When the working state of the PPVSLVS is converted from “valve-less” to “valve-based,” the pump flow rate of this pump will be changed from one peak to double peak. Simultaneously, when the driving voltage of the pump is 180 V at 12 Hz, the pump flow rate reaches a maximum value of 44.3 mL/min. Compared with the piezoelectric pump with a cardiac valve-like structure, under the same driving conditions, the pump flow rate of the PPVSLVS is remarkably increased. When the driving frequency is set as 12 and 24 Hz, the average pump flow rate is improved by 107% and 21.3%, respectively. The distance between the free ends of the valve will affect the working states and flow rate of the PPVSLVS. This study contributes to the application of piezoelectric pumps in artificial hearts.

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The Effect of Drive Signals on Output Performance of Piezoelectric Pumps

Jie,

Qi,

et al. 2024

Processes

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The output performance of piezoelectric pumps is not only affected by the structural design but is also related to the drive signal. To study the effect of different drive signals on the output performance of piezoelectric pumps, this paper takes dual-chamber serial piezoelectric pumps as the investigation object, theoretically deduces the effective value of the drive signal and the output performance of the piezoelectric pump, and tests the displacement of piezoelectric vibrator center, the output performance of the piezoelectric pump, and the operating noise within the range of 0–500 Hz, respectively, driven by square waves, sine waves, and triangular waves (the peak-to-peak values of which are all 300 V). The results show that at low frequencies, the piezoelectric vibrator’s center displacement curve matches the drive signal, which is sinusoidal and decreases with frequency. Under the square drive, the piezoelectric pump has the best performance, with a flow of 147.199 mL/min and pressure of 14.42 kPa, but the noise is also the highest. The output performance of the sine wave is better than that of the triangular wave, and the flow rate of the three signals shows a trend of first increasing and then decreasing.

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

Cited by 3 publications

References 25 publications

A Dual-Inlet Pump with a Simple Valves System

A Dual-Inlet Pump with a Simple Valves System

Research of piezoelectric pump with a vortex linear valve structure

The Effect of Drive Signals on Output Performance of Piezoelectric Pumps

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