对数螺旋组合管无阀压电微泵性能  

Characteristics of valveless piezoelectric micropump based on logarithmic spiral composite tube

作　　者：张习同 徐伟[1] 何秀华[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《排灌机械工程学报》2017年第2期119-125,132,共8页Journal of Drainage and Irrigation Machinery Engineering

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

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.A new type of logarithmic spiral pipe structure was presented to improve the characteristics of flow resistance in tubes to enhance the performance of the micropump. It is a kind of three-way tube consisting of the converging tube which were traditional diffuser/nozzle elements and the branch tube with the outline of logarithmic spiral. Orthogonal optimization was carried out on converging and branch tubes using the method of numerical simulation to optimize the structure. The results of the numerical simulation were supported by experimental data and the errors were within 20% and 12% respectively for the forward and reverse direction. The findings indicate that the ratio of the resistance through op- posite directions of this new pipe was approximately a constant of 1.7, which was better than the tradi- tional diffuser/nozzle elements. The micropulnp with the logarithmic spiral pipe was fabricated and tested. The experimental findings show that the head and the flow rate had peaks at 225 Hz of frequen- cy and increased with the input voltage amplitude. The micropump could reach the maximum head of 396 mm water column and flow rate of 0. 43 mL/min. This new logarithmic spiral pipe can effectively improve the performance of valveless piezoelectric micropump.

关 键 词：无阀压电微泵 对数螺旋组合管 正交优化 流阻性能 

分 类 号：TH321[机械工程—机械制造及自动化]