层叠型双腔并联压电泵性能研究

Performance Research on Stacked Double-chamber Parallel Piezoelectric Pump

为提高层叠型双腔并联压电泵的输出性能,在出口通孔处设计了隔板结构,以阻止流体同时出流时产生的正向碰撞和向对面腔内回流问题。采用液体水和空气作为输送介质,对试验样机进行了试验测试,结果表明:隔板结构可以大幅度提高层叠型双腔并联压电泵输送液体介质的能力,在80 V正弦交流电驱动下,最大输出流量可达460 mL·min^(-1),与没有隔板结构比较,输出流量可提高约30%。对该结构压电泵单个振子驱动与2个振子驱动时的关系进行了试验验证,结果表明:当工作介质为气体时,不管是同步驱动或异步驱动,2个振子工作时输出流量约为2个单个振子独立工作时输出流量之和;当工作介质为液体时,在2个振子同步驱动时输出流量出现小于单个振子工作时的输出流量情况,而异步驱动输出流量约为2个单个振子独立工作时输出流量和的1.4倍。

In order to improve the output performance of stacked double-chamber parallel piezoelectric pump,a partition structure is designed at the outlet through hole to prevent the forward collision and reflux to the opposite chamber when the fluid flows simultaneously.The test prototypes are tested by using liquid water and air as the transport medium.The results show that the partition structure can greatly improve the ability of stacked double-chamber parallel piezoelectric pump to transport liquid media.Driven by 80 V sinusoidal alternating current,the maximum output flow-rate can reach 460 mL·min^(-1),compared with no partition structure,and the flow-rate can be increased by about 30%.The results show that when the working medium is gas,the output flow of two oscillators is the sum of the output flow-rate when two oscillators work alone.When the working medium is liquid,the output flow-rate of two oscillators is less than the output flow-rate of a single oscillator driven synchronously,while the output flow-rate is about 1.4 times the output flow-rate of a single oscillator driven asynchronously.