无阀压电泵流阻测试装置研究

无阀压电泵的泵送性能主要取决于管道系统中的正、反向流阻差值,因而对流阻的测试尤为重要。为此设计了能够实现自动或半自动上水功能的无阀压电泵流阻测试装置,该装置测试液体的流速范围较宽,易于分析、研究流阻作用规律;以半球缺阀为例推导了阻力系数公式;利用新、旧2种测试装置对半球缺阻流体无阀压电泵的流阻进行了测试并计算了泵理论流量,与试验流量的偏差分别为34.38%、117.33%。研究表明:无阀压电泵流阻测试装置极大地提高了流阻测试精度;能够进行流阻测试、分析、泵理论流量计算及试验流量的预测。

Flow Resistance Testing Device of Valve-less Piezoelectric Pump

The pumping performance of valve-less piezoelectric mainly depends on the flow resistance difference between forward and reverse directions, so testing flow resistance is particularly important. Flow resistance testing device of valve-less piezoelectric pump was designed which can realize automatic or semi automatic water supply function and the measured flow range was wide. The device can be easily used to analyze and research flow action law. Hemisphere-segment valve was taken as study object and the resistance coefficient formula was derived. Flow resistances were tested respectively by traditional and novel test devices and theoretical pump flow were calculated. The deviations between theoretical and experimental flow rates were 34.38% and 117.33%, respectively. The results showed that the accuracy of flow resistance test was greatly improved by the flow resistance testing device of valve-less piezoelectric pump, which can test and analyze flow resistance, calculate pump theoretical flow and predict experimental flow.