频率控制四锥管压电泵双向流动的流场分析  

Flow field analysis of bidirectional flow in four-cone tubes piezoelectric pump through controlling frequency

作　　者：张伟荣 陈震林 陈晓生 张帆 桂珍珍 霍宇轩 周晓思 张建辉[1] ZHANG Weirong;CHEN Zhenlin;CHEN Xiaosheng;ZHANG Fan;GUI Zhenzhen;HUO Yuxuan;ZHOU Xiaosi;ZHANG Jianhui(College of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou 510006, China)

机构地区：[1]广州大学机械与电气工程学院,广州510006

出　　处：《重庆理工大学学报（自然科学）》2022年第6期316-322,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：广东省基础与应用基础研究基金项目“半开放式新压电材料驱动与感知柔性仿生深海机器人”(2019B1515120017)。

摘　　要：提出一种泵向转换与频率相关的无阀微泵,使泵送方向可在频率改变的瞬间完成转变。在100 V电压、5~125 Hz频率内进行变频流量实验,结果表明微泵存在2个正向流量波峰和2个反向流量波谷,其中最大正向流量为5.5 mL/min(25 Hz),最大反向流量为3.5 mL/min(100 Hz)。进行泵腔的气泡轨迹测试与微泵的动网格模拟,获取范围内最大正向流量与反向流量频率点的流动样式。测试结果显示,正向和反向频率下的气泡轨迹截然不同,但分别与正向和反向的流动样式匹配。结合对应的流量监测结果,从模拟的角度解释了双向泵送特性。Controlling the pumping direction of the positive displacement pump by changing the driving frequency is an interesting and rare phenomenon.We propose a valveless micropump that allows the pumping direction to be transformed at the moment of frequency change.The micropump consists of a flow channel with four conical tubes,a pump cavity and a buzzer.The flow experiment under variable frequency shows that there are two forward wave crest and two reverse wave trough.In the range of 5~125 Hz and at 100 V,the maximum forward flow is 5.5 mL/min at 25 Hz and the maximum reverse flow is 3.5 mL/min at 100 Hz.The bubble trajectory observed and dynamic grid simulation of the micropump are applied to obtain the flow pattern of the maximum forward and reverse flow frequency points within the range.The results showe that the bubble trajectory in forward pumping direction is different from that in the opposite direction,but matches the flow experiment.The bidirectional characteristics are explained from perspectives of simulation and experiment successfully.

关 键 词：双向性 频率控制 无阀微泵 流场分析 

分 类 号：TM359.9[电气工程—电机]