四腔并联压电泵结构设计

为提高压电泵的输出性能,设计了一种层叠型四腔并联有阀压电泵。在80 V正弦交流电驱动下,40~400 Hz工作频率内,以水和空气作为介质,分别选用不同数量的压电振子进行驱动,在不同的驱动方式(指振子间工作时的相位差)下对泵的输出性能进行试验测试。结果显示,当泵送空气时,不管多少个振子进行驱动,驱动方式对泵的输出流量几乎不产生任何影响,在测试频率范围内,输出流量随频率成线性变化,最大输出气体流量可达3600 mL/min;当泵送液体时,驱动方式对泵的输出流量影响很大,当同侧的压电振子为异步驱动时,输出流量的效果更好,在工作频率180 Hz时,最大输出液体流量可达830 mL/min。试验结果为多振子驱动压电泵选择合适的振子间驱动方式提供了参考依据。

Structural Design of Four-chamber Parallel Piezoelectric Pump

In order to improve the output performance of a piezoelectric pump, a type of stacked four-chamber parallel piezoelectric pumps with valves are designed. Driven by 80 V sinusoidal alternating current and in the working frequency of 40~400 Hz (water and air are used as the medium), different numbers of piezoelectric vibrators are selected for driving, respectively. Then, the output performances of the pumps under different driving modes (referring to the phase difference when the oscillators work) are tested. The results show that, when pumping air, the driving mode has almost no effect on the output flow of the pump, no matter how many vibrators are driven. Moreover, the output flow changes linearly with the frequency in the test frequency range and the maximum output gas flow rate can reach 3600 mL/min. By contrast, when the liquid is pumped, the driving mode has a great influence on the output flow of the pump. When the piezoelectric vibrator on the same side is driven asynchronously, the output flow shows a better performance. The maximum output liquid flow rate can reach 830 mL/min at the frequency of 180 Hz. The results provide a reference for choosing a suitable inter-vibrator driving mode for the multi-vibrator-driven piezoelectric pump.