Design and implementation of combined liquid pump and active–passive mixer for a drug delivery system utilizing two 1-DOF piezoelectric actuated cantilever beams

Ohol, R. M.; Vasuki, B.

doi:10.1016/j.matpr.2021.09.275

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The chamber deformation is restricted due to the quasi-static working mode of the piezoelectric vibrator; thus, the output performance of non-resonant piezoelectric pumps is limited. In resonant piezoelectric pumps, the piezoelectric vibrator is usually separated from the pump chamber diaphragm, and different resonant modes are utilized to oscillate the pump chamber with amplified vibrating amplitudes [ 18 , 19 ]. Since the piezoelectric vibrator works at the resonant state, resonant piezoelectric pumps can transmit fluid at large flowrates and backpressures, such as the folded piezoelectric vibrator proposed by Wang [ 20 ], and the U-shaped piezoelectric resonator designed by Chen [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Matching the Optimal Operating Mode of Polydimethylsiloxane Check Valves by Tuning the Resonant Frequency of the Resonator in a Piezoelectric Pump for Improved Output Performance

et al. 2022

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This paper proposes to improve the output performance of a piezoelectric pump by matching the resonant frequency of the resonator to the optimal operating mode of bridge-type polydimethylsiloxane (PDMS) check valves. Simulation analyses reveal that the side-curling mode of the PDMS valve is conducive to liquid flow and exhibits a faster frequency response compared with the first bending mode. The first bending resonant frequency of a beam-type piezoelectric resonator was tuned close to the side-curling mode of the PDMS valve by adjusting the weight of two mass blocks installed on both ends of the resonator, so that both the resonator and the valve could work at their best conditions. Experiments were conducted on a detachable prototype piezoelectric pump using PDMS valves with three different lengths. The results confirm that the peak flowrate at the resonant point of the pump reaches its maximum when the resonant frequencies between the resonator and the valve are matched. Maximum peak flowrates of 88 mL/min, 72 mL/min and 70 mL/min were achieved at 722 Hz, 761 Hz and 789 Hz, respectively, for diaphragm pumps using five-, four- and three-inlet-hole PDMS valves, under a driving voltage of 300 Vpp.

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