低阈值高通量被动微阀的研制与性能研究  

Design and Characterization of Passive Microvalve for High⁃throughput Flow Control Under Low Threshold Pressure

作　　者：张鑫杰 陈杰铭[1] ZHANG Xin⁃jie;CHEN Jie⁃ming(College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213022,China;School of Mechanical Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]河海大学机电工程学院,江苏常州213022 [2]东南大学机械工程学院,江苏南京211189

出　　处：《仪表技术与传感器》2020年第5期24-27,共4页Instrument Technique and Sensor

基　　金：江苏省自然科学基金资助项目(BK20190167);中国博士后科学基金资助项目(2019M651643);中央高校基本科研业务费专项资金资助项目(B200202230)。

摘　　要：文中提出一种新型结构的微流控被动流量调节阀,该微阀设计有椭球面结构的调流腔,利用带微孔的柔性薄膜在液体压力作用下产生弹性变形来挤压调流腔中的液体,从而自动实现流量调控。为研究微阀的调流性能,采用3D打印与紫外激光加工技术制作了微阀样件。建立微阀的流固耦合模型,仿真分析微阀中液体流量调控及柔性薄膜受压变形过程,结合实验研究微阀的压力流量特性,实验结果表明该微阀在低阈值液体压力下具有良好的高通量稳流自调控能力。A novel microfluidic valve was proposed for passive flow control in microfluidic environment.The valve was de⁃signed with a flow regulation chamber of ellipsoid surface,and a flexible membrane with micro⁃sized holes was used to squeeze the liquid in the flow regulation chamber through the autonomous membrane deflection,thus the flow rate of the valve could be con⁃trolled automatically.To characterize the flow regulation ability of the valve,3D printing and UV laser micromachining technologies were used to fabricate the prototype of the valve at first.Then,a fluid⁃structure interaction model was built to analyze the flow reg⁃ulation process and the membrane deformation of the valve under pressurized liquid.Finally,experiments were performed to study the pressure⁃flow rate characteristics of the valve.The experimental results show the valve has high⁃throughput and stable flow au⁃toregulation ability under low threshold pressures.

关 键 词：微流控 被动阀 低阈值 高通量 自动调控 稳流 

分 类 号：TH137[机械工程—机械制造及自动化]