A Novel PZT Pump with Built-in Compliant Structures

Bao, Qibo; Zhang, Jianhui; Tang, Ming; Huang, Zhi Xiang; Lai, Liyi; Huang, Jun; Chen, Wu

doi:10.3390/s19061301

Cited by 36 publications

(21 citation statements)

References 55 publications

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“…In the high frequency region (>25 Hz), the amplitude decayed with increasing frequency and was accompanied by a few amplitude peak points. These peak points were related to the characteristic properties of the piezoelectric vibrator [16]. The measured flow-rate-frequency relationships of the SLFT PZT pump at different voltages are shown in Figure 12.…”

Section: Resultsmentioning

confidence: 97%

“…It can be seen that the amplitude of the center point of the vibrator was positively correlated with the voltage, and these maximum amplitudes were 0.062 mm (40 V, 10 Hz), 0.095 mm (60 V, 10 Hz), 0.136 mm (80 V, 10 Hz), 0.217 mm (100 V, 11 Hz), and 0.228 mm (120 V, 10 Hz), as shown in Figure 11. In the low frequency region (1-25Hz), firstly, the amplitude of the piezoelectric vibrator increased with the increasing frequency (1-10 Hz), then, when the amplitude increased to a certain value, the amplitude decreased with the increasing frequency (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25), and was approximately zero after 25 Hz. In the high frequency region (>25 Hz), the amplitude decayed with increasing frequency and was accompanied by a few amplitude peak points.…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

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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.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

Self Cite

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“…Recently, a millimeter-scale piezoelectric pump with built-in compliant structures was designed, fabricated, and experimentally tested by a group of researchers (Bao et al, 2019). This device had a chamber of 12 × 1.1 mm (diameter × height), a piezoelectric vibrator, and two pairs of valve featured elements on the flowing channel (Figure 1).…”

Section: Mechanical Micropumpsmentioning

confidence: 99%

“…The working principle of the proposed lead zirconate titanate (PZT) pump: (A) the pump chamber in suction stroke; (B) the inhaling principle during suction stroke; (C) the pump chamber in compression stroke; (D) the exhausting principle during compression stroke; (1) the piezoelectric ceramic; (2) the brass substrate;(3) the pump chamber; (4) the compliant structure; (5) the outlet channel; (6) the inlet channel. Reproduced fromBao et al (2019) with permission from MDPI Open Access Journals.…”

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confidence: 99%

Recent Advances in Micro-Electro-Mechanical Devices for Controlled Drug Release Applications

Mendoza

Scilletta

Bellino

et al. 2020

Front. Bioeng. Biotechnol.

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In recent years, controlled release of drugs has posed numerous challenges with the aim of optimizing parameters such as the release of the suitable quantity of drugs in the right site at the right time with the least invasiveness and the greatest possible automation. Some of the factors that challenge conventional drug release include longterm treatments, narrow therapeutic windows, complex dosing schedules, combined therapies, individual dosing regimens, and labile active substance administration. In this sense, the emergence of micro-devices that combine mechanical and electrical components, so called micro-electro-mechanical systems (MEMS) can offer solutions to these drawbacks. These devices can be fabricated using biocompatible materials, with great uniformity and reproducibility, similar to integrated circuits. They can be aseptically manufactured and hermetically sealed, while having mobile components that enable physical or analytical functions together with electrical components. In this review we present recent advances in the generation of MEMS drug delivery devices, in which various micro and nanometric structures such as contacts, connections, channels, reservoirs, pumps, valves, needles, and/or membranes can be included in their design and manufacture. Implantable single and multiple reservoir-based and transdermalbased MEMS devices are discussed in terms of fundamental mechanisms, fabrication, performance, and drug release applications.

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“…Piezoelectric pumps are microfluidic machinery. Piezoelectric pumps have the advantages of simple structure, high driving strength, easy miniaturization, no magnetic influence and low noise [ 1 , 2 , 3 , 4 , 5 ], etc. They can be applied to biomedical [ 6 , 7 , 8 ], microelectromechanical systems [ 9 , 10 ] and fuel cells [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Research on Inlet and Outlet Structure Optimization to Improve the Performance of Piezoelectric Pump

Zhao

Wang

et al. 2020

Micromachines

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As piezoelectric pumps are used in more fields, they are gradually failing to meet the application requirements due to their low output performance. Therefore, improving the output performance of piezoelectric pumps helps to expand their applications. This paper argued that the dynamic load of liquid in the inlet and outlet pipelines was an important factor that weakened the performance of piezoelectric pumps. Therefore, in order to reduce the dynamic load, it was proposed to replace the conventional piezoelectric pump inlet and outlet by an elastic inlet and outlet. After introducing the structure and working principle of elastic inlet and outlet, the mechanism of reducing the dynamic load by elastic inlet and outlet was analyzed. Then, the influence of the elastic cavity height on the performance of the piezoelectric pump was studied from both fluid simulation and theoretical analysis. Finally, several prototypes were made. The effectiveness of the elastic inlet and outlet on improving the performance of the prototype and the effect of the elastic cavity height on the performance of the prototype were tested, respectively. The test results showed that the elastic inlet and outlet effectively improved the flow rate and output backpressure without increasing the maximum output backpressure. The maximum flow rate of the pump system without load was increased by 36%. In addition, the elastic cavity height adversely affected the flow rate and output backpressure of the prototypes, but had no effect on the maximum output backpressure. In summary, the elastic inlet and outlet can effectively increase the output performance of the piezoelectric pump, but the design height should be appropriately reduced.

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A Novel PZT Pump with Built-in Compliant Structures

Cited by 36 publications

References 55 publications

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

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

Recent Advances in Micro-Electro-Mechanical Devices for Controlled Drug Release Applications

Research on Inlet and Outlet Structure Optimization to Improve the Performance of Piezoelectric Pump

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