A normally-closed piezoelectric micro-valve with flexible stopper
Source abstract
Abstract
In the field of controlled drug delivery system, there are still many problems on those reported micro-valves, such as the small opening height, unsatisfactory particle tolerance and high cost. To solve the above problems, a novel normally-closed piezoelectric micro-valve is presented in this paper. The micro-valve was driven by circular unimorph piezoelectric vibrator and natural rubber membrane with high elasticity was used as the valve stopper. The small axial displacement of piezoelectric vibrator can be converted into a large stroke of valve stopper based on hydraulic amplification mechanism. The experiment indicates that maximum hydraulic amplification ratio is up to 14, and the cut-off pressure of the micro-valve is 39kPa in the case of no working voltage. The presented micro valve has a large flow control range (ranging from 0 to 8.75mL/min).
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Research context
OpenAlex topics: Microfluidic and Capillary Electrophoresis Applications · Microfluidic and Bio-sensing Technologies · Electrohydrodynamics and Fluid Dynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jilin University 1 School of Mechanical Science and Engineering, , Changchun City 130025, Jilin, China
Changchun University 2 School of mechanical and Vehicular Engineering, , Changchun City 130022, Jilin, China
Funding
National Natural Science Foundation of China
References (20)
Show source-provided references
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