新结构药品输送压电泵的泵送特性  

Pumping Performance of a New Piezoelectric Pump for Drug Delivery

作　　者：阚君武[1] 杨志刚[1] 唐可洪[1] 程光明[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130025

出　　处：《生物医学工程学杂志》2004年第2期297-301,共5页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目 (5 9975 0 40 );国家 863计划资助项目 (2 0 0 2 AA43 12 5 0 )

摘　　要：提出了一种新式的双压电薄膜驱动串联压电泵 ,并对其输出性能进行了试验研究。压电泵采用多层粘结的圆片结构 ,包括 PMMA(聚甲基丙烯酸甲酯 )泵体、两个独立驱动的压电薄膜驱动器和三个弹性薄膜阀片。两个压电薄膜驱动器交叉工作 (即驱动相位相差 180°) ,相当于两个独立的单腔体泵串联工作 ,使该泵具有较高的输出压力和流量。泵的输出性能取决于压电薄膜几何参数。利用厚度 0 .18m m、直径 5 0 mm的压电薄膜制作的试验样机能以两种不同的方式工作 :直接输液 (药液流经泵腔 )和间接输液 (药液不经过泵腔 ,利用空气压力使密封容器内流体输出 )。两种工作方式的频率响应特性差别很大 ,间接输液的高频性能好 ,而直接输液的低频性能好。在驱动电压 80 v、频率为 2 0 Hz时 ,实际测得间接 /直接输液的最大流量分别为 2 2 0、35 ml/ m in,最大出口压力分别为 14、2 1KPa。A novel double chamber series piezoelectric pump has been presented and tested. The pump is a multi layer circular planar structure, consisting of PMMA (polymethyl methacrylate) pump body, two PZT actuator membranes and three cantilever valves. The PZT actuators are driven at a phase difference of 180°, which is equal to two one chamber pumps running in series. The output performance depends on the geometrical parameters of the actuator membrane. The prototype pump, fabricated with the PZT membrane 0.18 mm in thickness and 50mm in diameter of 50mm, can deliver drug in either direct way (pumping liquid drug) or indirect way (pumping air to extrude liquid drug from a sealed container). The frequency response characteristic of the two handling methods is of difference. The pump obtains optimum performance at low frequency for liquid as medium, and at high frequency for air as medium. For both the direct delivery and indirect delivery, the maximum flowrate achieved reached up to 220ml/min and 35ml/min, respectively; and the maximum backpressure obtained amounted to about 14 KPa and 21 KPa, respectively, at the applied voltage of 80V with frequency of 20Hz.

关 键 词：药品输送 压电泵 压电薄膜驱动 工作方式 

分 类 号：TH788[机械工程—仪器科学与技术]