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基于合成射流的无阀压电泵性能

Keywords: 合成射流,无阀压电泵,连续出流

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Abstract:

提出了一种可以实现连续出流的大流量无阀压电泵,该泵基于合成射流原理,其输出流量大于泵腔体积变化量.为了分析微泵流动特性及内部流场,建立其三维模型并采用CFX软件进行数值模拟.结果表明:泵腔高度、进口直径和出口直径是影响该泵性能的3个主要因素;进出口间距和泵腔直径对流量的影响较小;在一定速度范围内,对空气和水2种介质的计算结果进行了分析,发现在较小速度范围内2种介质的计算结果相差较大,在较大速度范围内二者相差较小.进口直径为2mm,出口直径为1mm,泵腔高度为3mm,频率f=100Hz,喷口最大雷诺数Re=750时,流量为24mL/s,容积变形量为1.12.

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