Abstract: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 was 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 indicated that the ratio of the resistance through opposite directions of this new pipe was approximately a constant 1.7, which was better than the traditional diffuser/nozzle elements. The micropump with the logarithmic spiral pipe was fabricated and tested. The experimental findings showed that the head and the flow rate had peaks at 225 Hz of frequency 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.
[1]DOUGLAS B W, GEORGE M W. Applications of microfluidics in chemical biology[J]. Current opinion in chemical biology, 2006, 10(6): 584-591.[2]HEROLD K E, RASOOLY A. Lab on a chip technology: fabrication and microfluidics[M]. Poole: Caister Academic Press, 2009.[3]YANG Song, HE Xiuhua, YUAN Shouqi, et al. A valveless piezoelectric micropump with a Coanda jet element [J]. Sensors and actuators A: physical, 2015, 230:74-82.[4]LINTEL H G T V, POL F C M V D, BOUWATRA S. A piezoelectric micropump based on micromachining of sili-con [J]. Sensors and actuators,1988, 15(2): 153-167.[5]NGUYEN N T, TRUONG T Q, WONG K K. Micro check valves for integration into polymeric microfluidic devices[J]. Micromechanics and microengineering, 2004, 14:69-75.[6]何秀华,禚洪彩, 杨嵩,等.无阀压电泵用平面锥管内部流动特性[J].排灌机械工程学报,2012,30(5): 532-537. HE Xiuhua, ZHUO Hongcai, YANG Song,et al. Internal flow characteristics of plane taper pipe valveless piezoelectric pump [J].Journal of drainage and irrigation machinery engineering, 2012,30(5): 532-537.(in Chinese)[7]SINGHAL V, GARIMERLLA S V, RAMAN A, et al. Microscale pumping technologies for microchannel coo-ling system [J].Applied mechanics reviews, 2004, 57(3):191-221.[8]IZZO I, ACCOTO D, MENCIASSI A, et al. Modeling and experimental validation of a piezoelectric micropump with novel no-moving part valves [J]. Sensors and actua-tors A:physical, 2007, 133(1):128-140.[9]黄俊,张建辉,王守印.多级“Y”型流管无阀压电泵的原理与试验验证[J]. 光学精密工程,2013,21(2):423-430. HUANG Jun, ZHANG Jianhui, WANG Shouyin. Theory and experimental verification on valveless piezoelectric pump with multistage Y-shape tubes[J]. Optics and precision engineering, 2013,21(2):423-430.(in Chinese)[10]邓志丹,何秀华,杨嵩,等. 无阀压电泵用椭圆组合管正交优化设计与实验[J].农业机械学报, 2013, 44(9): 284-289. DENG Zhidan, HE Xiuhua, YANG Song, et al. Orthogonal optimization design and experimental of oval composite tube in valveless piezoelectric pump[J]. Transactions of the CSAM, 2013, 44(9): 284-289.(in Chinese) [11]何秀华,王健,杨嵩,等. 三通全扩散/收缩管无阀压电泵的流阻性能[J]. 排灌机械工程学报,2010, 28(6): 497-501. HE Xiuhua,WANG Jian,YANG Song,et al. Flow resi-stance characteristics of valveless piezoelectric pump with three-way diffuser/nozzle tube [J]. Journal of drainage and irrigation machinery engineering, 2010, 28(6): 497-501.(in Chinese)[12]刘瑞江,张业旺,闻崇炜,等. 正交试验设计和分析方法研究[J]. 实验技术与管理,2010,27(9):52-55. LIU Ruijiang,ZHANG Yewang,WEN Chongwei,et al. Orthogonal experiment design and analysis method research [J]. Journal of experimental technology and management, 2010, 27(9):52-55.(in Chinese)[13]李军,吴博达,程光明,等.收缩管/扩张管型无阀压电泵的工作原理[J]. 压电与声光,2000,22(6): 376-378. LI Jun,WU Boda,CHENG Guangming, et al. The principle of diffuser/nozzle based valveless piezoelectric pump [J]. Piezoelectrics & acoustooptics, 2000, 22(6): 376-378.(in Chinese)[14]白兰. 基于MEMS的无阀压电泵数值仿真与实验研究[D]. 长春:中国科学院长春精密机械与物理研究所,2005.
没有找到本文相关文献
江苏大学梦溪校区(镇江市梦溪园巷30号)图书馆5楼 0511-84440893
传真0511--84440033 Copyright 江苏大学杂志社 2010-2015 All
Rights Reserved