关键词: 机械设计, 压电驱动, 胰岛素泵, 微泵, 微量推注

Abstract: A micropump with unique structure and working principle for the insulin injection actuated by the piezoelectric unimorph was proposed. The pump prototype was designed and manufactured in the laboratory. To realize the structure miniaturization and output precision, the lamination of piezoelectric elements and the series connecting multichamber configuration were adopted. Systematic experiments on the prototype demonstrate that the proposed piezoelectric micropump is characterized by stable operation capability, easy to adjust the injection dose, adapted to miniaturization and implantable application. The micropump prototype overall dimensions are 16.5 mm×60 mm, the maximal output flow rate is 3 mL/min with the maximal pressure of 22 kPa under the 36 V sinusoidal wave driving voltage at 200 Hz, the minimal output flow per pulse is 7.5×10-5mL.

Key words: mechanical design, piezoelectric drive, insulin pump, micropump, microinjection