scholarly journals Experimental Verification of the Pumping Effect Caused by the Micro-Tapered Hole in a Piezoelectric Atomizer

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2311 ◽  
Author(s):  
Jianhui Zhang ◽  
Qiufeng Yan ◽  
Jun Huang ◽  
Chuanyu Wu
Keyword(s):  
Flow Resistance ◽  
Experimental Results ◽  
Environmental Scanning ◽  
Rate Measurement ◽  
Flow Tube ◽  
Piezoelectric Pump ◽  
Pumping Effect ◽  
Measurement Experiment ◽  
Valveless Piezoelectric Pump ◽  
Tapered Hole

In this study, we examined the use of a dynamic micro-tapered hole as a micro-scale tapered flow tube valveless piezoelectric pump. Firstly, we obtained photographs of a micro-tapered hole by using an environmental scanning electron microscope (ESEM). Then, we explained the pump effect of the micro-tapered hole, and derived the atomization rate equation. Furthermore, we reported an atomization rate measurement experiment that eliminated the atomization caused by a pressure increase, and demonstrated that a change in the volume of a micro-tapered hole could produce atomization. The experimental results indicate that, under the same voltage, the forward atomization rate is much higher than the reverse atomization rate and that the atomization rate increases with the micro-tapered hole volume. The experimental results show that the atomization of the micro-tapered aperture atomizer is caused by its pumping effect. Moreover, the flow resistance and volume of the micro-tapered hole can affect the atomization rate.

scholarly journals Simulation of raindrop-shaped flow tube valveless piezoelectric pump

2019 ◽  
Vol 1314 ◽  
pp. 012047
Author(s):  
Ming Tang ◽  
Qibo Bao ◽  
Jianhui Zhang ◽  
Liyi Lai ◽  
Qingshuang Ning
Keyword(s):  
Flow Tube ◽  
Piezoelectric Pump ◽  
Valveless Piezoelectric Pump

scholarly journals Design and Experimental Verification of a PZT Pump with Streamlined Flow Tubes

2019 ◽  
Vol 9 (18) ◽  
pp. 3881 ◽  
Author(s):  
Ming Tang ◽  
Qibo Bao ◽  
Jianhui Zhang ◽  
Qingshuang Ning ◽  
Chaobin Chen ◽  
...  
Keyword(s):  
Flow Rate ◽  
Flow Resistance ◽  
Maximum Amplitude ◽  
Maximum Flow ◽  
Flow Stability ◽  
Rate Equations ◽  
Flow Tube ◽  
Piezoelectric Pump ◽  
Streamlined Flow ◽  
Frequency Relationship

In this paper, a streamlined flow tube valveless piezoelectric pump (SLFT PZT pump) is proposed to modify the single flow trend and improve the fluid flow stability. Firstly, the structural and working principle of the streamlined flow tube, which accounts for changing the flow trend and improving the flow stability, were analyzed. The flow resistance and flow rate equations were established. Secondly, the pressure and velocity fields of the tube were simulated. These simulated results were consistent with the theoretical results. Thirdly, the flow resistance of the flow tube was tested with pressure differences of 1000 Pa, 1200 Pa, 1400 Pa and 1600 Pa respectively. The trend of the result curves was consistent with the simulated results. The amplitude-frequency relationship and the flow-rate-frequency relationship were also tested, both result curves highly corelate. The maximum amplitude was 0.228 mm (10 Hz, 120 V), and the maximum flow rate was 17.01 mL/min (10 Hz, 100 V). Finally, the theoretical flow rate of the SLFT PZT pump was calculated at 100 V and 120 V. These results roughly fitted with the experimental results. The streamlined flow tube could change the internal flow trend that remarkably improved the flow stability. Therefore, it promoted the application of the valveless PZT pump in living cells, biomedical and polymer delivery.

Theory and experimental verification of spiral flow tube-type valveless piezoelectric pump with gyroscopic effect

2013 ◽  
Vol 195 ◽  
pp. 1-6 ◽  
Author(s):  
Xue-fei Leng ◽  
Jian-hui Zhang ◽  
Yan Jiang ◽  
Jin-Yuan Zhang ◽  
Xue-cheng Sun ◽  
...  
Keyword(s):  
Experimental Verification ◽  
Spiral Flow ◽  
Flow Tube ◽  
Gyroscopic Effect ◽  
Piezoelectric Pump ◽  
Tube Type ◽  
Valveless Piezoelectric Pump

scholarly journals Equivalent Circuit Modeling for a Valveless Piezoelectric Pump

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2881 ◽  
Author(s):  
Jianhui Zhang ◽  
Yuan Wang ◽  
Jun Huang
Keyword(s):  
Equivalent Circuit ◽  
Flow Rate ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Experimental Results ◽  
Driving Voltage ◽  
Piezoelectric Pump ◽  
Pump System ◽  
Field Problem ◽  
Valveless Piezoelectric Pump

Various kinds of the models had been proposed to explain the relationship between the performance and the structural parameters of valveless piezoelectric pumps, so as to evaluate the functional performance such devices. Among the models, the equivalent circuit model, which converts the multi-field problem of a valveless piezoelectric pump system into a simple circuit problem, is the most simple and clear one. Therefore, the proposed structure and working principle of the valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes are analyzed; then, the equivalent circuit model of the valveless piezoelectric pump is established based on the working principles of this pump and liquid-electric analogy theory. Finally, an experimental study of the pump is carried out, with a comparative analysis of the experimental results and the simulation results of the generated equivalent circuit. The experimental results show that with a driving voltage of 100 V and frequency of 6 Hz, the maximum flow rate of the valveless piezoelectric pump is 1.16 mL/min. Meanwhile, the output current of equivalent circuit also reaches its peak at the frequency of 6 Hz, therefore, indicating a good predictive ability of this model in calculating the maximum output flow rate and best working frequency of valveless piezoelectric pumps.

scholarly journals Design and Testing of a Valveless Piezoelectric Pump with Conical Vortex Diodes

2020 ◽  
Vol 306 ◽  
pp. 04003
Author(s):  
Lei Zou ◽  
Kai Li ◽  
Jun Huang
Keyword(s):  
Flow Resistance ◽  
Reverse Flow ◽  
Maximum Output ◽  
Piezoelectric Pump ◽  
Element Analysis ◽  
Output Pressure ◽  
Drive Frequency ◽  
The Difference ◽  
Conical Vortex ◽  
Valveless Piezoelectric Pump

The valveless piezoelectric pump delivers fluid based on the difference of flow resistance of internal tube. In this paper, a vortex diode with conical tangential tube is proposed, which possesses the great characteristic of reverse cut-off, and the analysis of the forward and reverse flow resistance of the conical vortex diode is verified by finite element analysis. Then, a valveless piezoelectric pump with conical vortex diodes as the internal channel is designed, and the prototype is manufactured. The results of the output performance experiment show that the maximum output flow rate of the valveless piezoelectric pump is 10.44 g/min at the drive frequency of 45Hz, and the maximum output pressure is 560 Pa at the drive frequency of 35Hz. The proposal of the valveless piezoelectric pump provides a good reference for more new types of valveless piezoelectric pumps.

scholarly journals Numerical simulation and experimental study on valveless piezoelectric pump with triangular obstacles

2021 ◽  
Vol 2083 (2) ◽  
pp. 022028
Author(s):  
Yeming Sun ◽  
Yu Wang ◽  
Yiwei Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Flow Resistance ◽  
Reverse Flow ◽  
Maximum Output ◽  
Driving Voltage ◽  
Driving Frequency ◽  
Piezoelectric Pump ◽  
Valveless Pump ◽  
Valveless Piezoelectric Pump

Abstract A valve less piezoelectric pump with triangular obstacles is designed and manufactured, which uses piezoelectric vibrator as power source. The working principle and theoretical flow rate of the valveless piezoelectric pump are analyzed, and its flow rate expression is derived. The flow resistance characteristics of triangular obstacles are simulated by numerical simulation. Based on the mass fraction distribution of liquid water, the forward and reverse flow resistance of triangular obstacles and the influence of triangular obstacles on pumping capacity are analyzed. Finally, two groups of test prototypes of the valveless pump are made by using the engraving machine, and the flow measurement test is carried out. The experimental results show that the valveless piezoelectric pump with triangular obstacles can realize the valveless pumping function, and the pumping flow per unit time increases with the increase of triangular obstacles in the channel, and decreases with the increase of the distance between triangular obstacles and the channel. When the driving voltage is 140V and the driving frequency is 10Hz, the maximum output flow of the piezoelectric pump is 16.26ml/min.

Experiment analysis of high output pressure piezoelectric pump with straight arm wheeled check valve

2021 ◽  
pp. 1045389X2098700
Author(s):  
Lipeng He ◽  
Xiaoqiang Wu ◽  
Zheng Zhang ◽  
Zhe Wang ◽  
Bangcheng Zhang ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Energy Loss ◽  
Check Valve ◽  
Experimental Results ◽  
Piezoelectric Pump ◽  
Output Pressure ◽  
Pressure Characteristic ◽  
Analysis System ◽  
Experiment Analysis ◽  
High Output

Piezoelectric pumps are applied in many fields, such as chemical analysis system and fluid pumping systems. Piezoelectric pumps with high output pressure can meet the needs of more fields. This article introduces the design and fabrication of a high output pressure piezoelectric pump with straight arm wheeled check valve. In this paper, the influence of straight arm wheeled check valve on the output pressure of piezoelectric pump is deeply discussed from the aspect of energy loss. This study investigated the effect of valve arm number ( N = 2, 3,4, and 5), the valve arm width ( W = 0.8, 1.0, and 1.2 mm), and the valve arm length ( L = 1.92, 2.02, and 2.12 mm) on the output pressure of piezoelectric pump. The output pressure characteristic of straight arm wheeled check valve piezoelectric pump with different valve parameters is obtained by experiment. Experimental results show that when N = 4, W = 1.0 mm, L = 2.02 mm, the output pressure of the straight arm wheeled check valve piezoelectric pump has the best output pressure of 27.41 kPa at 220 V and 85 Hz. This study provides a reference for the further application of piezoelectric pumps in fluid pumping field.

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