Design and Application of High Flow Rate Piezoelectric Pump on Various Fluids with Different Viscosities
Date Issued
2014
Date
2014
Author(s)
Hsiao, Hsiang-Lun
Abstract
A versatile piezoelectric pump with check valve is designed and analyzed. In order to meet the requirement for biomedical use, the flow rate and the tolerance of certain viscosity of fluid must be considered. The size of PZT on the piezoelectric actuator is varied, including the diameter and the thickness, and the pump has a maximum flow rate of 112ml/min. Due to the bubbles, the second edition of the pump with larger size is fabricated. For this second edition, two types of valve are designed and tested for comparison. One is the cantilever-type valve, and the other is the bridge-type valve. The results show that the pump with the bridge-type valve has better stability, and the pump with the cantilever-type valve has a higher maximum flow rate. Besides, the compression ratio of the pump is altered, and has an optimized value of 0.05, at which the pump not only has higher flow rate and better self-priming capability but also is able to pump air.
The pump is tested though three experiments: the backpressure tolerance, the effect of the fluid viscosity, and the head loss from the inlet to the outlet. The flow rate of all pumps declines nearly linearly with the increase of the backpressure. Similarly, the higher the fluid viscosity is, the lower the flow rate is, and it could also be deduced from the head loss in different fluids through the same chamber and pipe.
Subjects
圓形壓電片
壓電泵
有閥
壓縮比
黏滯係數
Type
thesis
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ntu-103-R01522301-1.pdf
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