对数螺旋组合管无阀压电微泵性能

发布时间：2018-06-26 06:08

本文选题：无阀压电微泵 + 对数螺旋组合管　；参考：《排灌机械工程学报》2017年02期

【摘要】：为了增大流管的流阻比以提高微泵性能,在传统的扩散/收缩管基础上提出1种新型对数螺旋组合管结构.该组合管为三通结构,由汇流管即传统的扩散/收缩管和分流管即以对数螺旋线为轮廓的一对对称流管组成.利用数值模拟方法分别对汇流管和分流管进行正交优化设计,并通过试验对数值模拟结果进行检验.结果表明优化后的对数螺旋组合管正反向流阻比近似为常数1.7,优于传统的扩散/收缩管.正、反向流动数值模拟结果相比试验值误差分别小于20%和12%.加工出应用对数螺旋组合管的样泵并进行试验测量,结果显示该微泵的扬程和流量在频率为225 Hz下存在峰值,该频率下扬程和流量随输入电压的增大而增大.该微泵最大扬程为396 mm水柱,最大流量为0.43 mL/min.应用该组合管可以有效增大正反流阻比从而提高无阀压电微泵的性能.
[Abstract]:In order to increase the flow resistance ratio of the flow tube to improve the performance of the micropump, a new logarithmic spiral tube structure is proposed based on the traditional diffusion / contraction tube. The combined tube is a three-way structure, which consists of a confluence tube, a conventional diffusion-contraction tube and a shunt tube, that is, a pair of symmetrical flow tubes with a logarithmic helix as the outline. The orthogonal optimization design of the confluence tube and the shunt tube is carried out by using the numerical simulation method, and the results of the numerical simulation are verified by experiments. The results show that the optimized logarithmic spiral composite tube has a constant flow resistance ratio of 1.7, which is better than the conventional diffusion / shrink tube. The results of numerical simulation of forward and reverse flow are less than 20% and 12%, respectively. A sample pump with logarithmic spiral tube was manufactured and measured. The results show that the lift and flow rate of the micropump are peak at 225 Hz, and the lift and flow rate increase with the increase of input voltage at the frequency of 225 Hz. The maximum head of the pump is 396 mm water column and the maximum flow rate is 0.43 mL / min. The performance of valveless piezoelectric micropump can be improved by using the combined tube.
【作者单位】：江苏大学能源与动力工程学院;
【基金】：国家自然科学基金资助项目(51276082) 江苏高校优势学科建设工程项目
【分类号】：TH38

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