两种双腔串联压电泵结构设计与性能比较

Structural design and performance comparison of two kinds of piezoelectric pump with two chambers in series

为研究结构形式对双腔串联压电泵输出性能的影响,根据其工作原理,设计了有导流槽和无导流槽两种结构形式的双腔串联有阀压电泵,并加工制造了试验样机,分别以水和空气为介质进行输出性能比较试验.试验结果表明,在110 V正弦交流电驱动下,有导流槽结构的双腔串联压电泵流量输出性能更好,输出的最大液体和气体流量分别为1100和650 mL/min,但容易在导流槽内残留气泡;两者压力输出性能整体上比较接近,最大输出压力可达100 kPa;无导流槽的双腔串联压电泵整体自吸性能更好,最大自吸高度为45 cm水柱.

In order to research structure effect on output performance of piezoelectric pump with two chambers in series, two structural forms of piezoelectric pump with two chambers in series with a diversion and no diversion slot were designed according to its working principle. The experimental samplers were manufactured and output performance experiments were carried out with water and air as the medium, respectively. The experimental results show that output flow rate of piezoelectric pump with two chambers in series with a diversion slot is better by powered 110 V sinusoidal AC drive voltage. The maximum output of liquid and gas flow rate are 1 100 mL/min and 650 mL/min, respectively, but residual bubble in the diversion slot is its disadvantage. Both the overall output pressure are closer and maximum output pressure reaches to 100 kPa. The self-priming performance of pump with no diversion slot is better and the largest self-priming water column height is 45 cm.