三腔串联压电泵的结构设计与试验测试

Structural design and performance test of serial-three-chamber piezoelectric pump

为研究增加腔体数目对压电泵输出性能产生影响,结合多腔体串联压电泵的工作特点,采用带有被动截止阀的工作方式,设计了一种结构新颖的三腔串联压电泵.理论分析了在压电振子不同工作方式下三腔串联压电泵的工作特点,获得最佳工作方式,并通过样机的试验测试进行验证.以水为工作介质,对三腔串联压电泵输出能力进行了试验测试,将输出结果同双腔串联压电泵进行比较.结果表明:三腔串联压电泵流量输出同两腔串联压电泵比较有所降低,前者约为后者的0.7倍,但压力输出有所提高,前者为后者的1.5倍;增加腔体数目会进一步提高串联压电泵的输出压力,但却减少了输出流量;所设计的三腔串联压电泵,在110 V正弦交流电驱动下,最大输出流量可达860 mL/min,最大输出压力可达80 kPa.

To explore effects of number of chambers on performance structure, e.g. serial-three-chamber piezoelectric pump was designed of piezoelectric pump, a new and fabricated by using three passive check valves based on the working principle of piezoelectric pump with more chambers. A series of experiments were performed on the pump with water under different working conditions and the experimental results were compared with those of a serial-double-chamber piezoelectric pump. The best working condition was studied analytically and validated experimentally for the designed pump. It was turned out that the flow rate of the three-chamber pump was lower than that of the double-chamber one, the flow rate of the former was 0.7 times the latter, but the output pressure of the former was as high as appro-ximate 1.5 times that of the latter. This suggests that increasing number of chambers can improve the output pressure, while it can reduce output flow rate as well. For the designed 860 mL/min maximal output flow rate and 80 kPa output pressure can be achieved under the driving voltage. pump, the 110 V AC