Output performance of piezoelectric pump driven by different excitation signals
LI Dinghua1, 2, JIA Junrui2, LI Yanlin3, HUANG Jun4
1.School of Electrical Engineering, Nantong University, Nantong, Jiangsu 226019, China; 2.Department of Mechatronics, Nantong Vocational & Technical Shipping College, Nantong, Jiangsu 226010, China; 3.Department of Enrollment and Employment, Nanjing Vocational Institute of Transport Technology, Nanjing, Jiangsu 211188, China; 4.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：To investigate output performance of valveless piezoelectric pumps driven by different excitation signals, a valveless piezoelectric pump with cone-shaped tubes was used in the paper. According to the mathematical equations of commonly used driving signals, such as sinusoidal, square and triangular waves, the vibration characteristics of the vibrator driven by these signals were analyzed. Then the performance of liquid transport in the pump and the vibration characteristics were measured by using deionized water. The experimental results show that the pump flow rate increases initially and then decreases with increasing driving frequency of these excitation signals. The maximum pump flow rate is 1.86 g/min for the square wave(9 Hz, 100 V), but the minimum flow rate is 1.29 g/min for the triangular wave. The maximum amplitude of the piezoelectric vibrator is 64.82 μm for the square wave, but the minimum amplitude is 52.29 μm for the triangular wave. Note that the pump flow rate versus piezoelectric vibrator amplitude curves show the amplitude is not the only factor affecting he output flow of the pump. After a comprehensive comparison, it is found that the piezoelectric pump driven by square wave has the best output performance, but its vibrator is noisier in operation, thus the pump application will be limited inevitably.
[1]SINGH S, KUMAR N, GEORGE D, et al. Analytical modeling, simulations and experimental studies of a PZT actuated planar valveless PDMS micropump[J]. Sensors and actuators A: physical, 2015, 225(1): 81-94.[2]ZHANG J H, WANG Y, FU J, et al. Advances in technologies of piezoelectric pumping with valves[J]. Transactions of Nanjing University of Aeronautics & Astronautics, 2016, 33(3): 260-273.[3]XIA Q X, ZHANG J H, LEI Hong, et al. Analysis on flow field of the valveless piezoelectric pump with two inlets and one outlet and a rotating unsymmetrical slopes element[J]. Chinese journal of mechanical engineering, 2012, 25(3): 474-483.[4]梁莉,马旭,张铁民.圆环型压电蠕动泵的结构设计与仿真[J].农业工程学报,2012,28(11): 40-44. LIANG Li, MA Xu, ZHANG Tiemin. Structure design and simulation of circular ring piezoelectric peristaltic pump[J]. Transactions of the CSAE, 2012, 28(11): 40-44.(in Chinese)[5]张习同,徐伟,何秀华.对数螺旋组合管无阀压电微泵性能[J]. 排灌机械工程学报, 2017, 35(2): 119-125. ZHANG Xitong, XU Wei, HE Xiuhua. Characteristics of valveless piezoelectric micropump based on logarithmic spiral composite tube[J]. Journal of drainage and irrigation machinery engineering, 2017, 35(2): 119-125.(in Chinese)[6]MA Y T, PEI Z G, CHEN Z X. Multi-field analysis and experimental verification on piezoelectric valveless pumps actuated by centrifugal force[J]. Chinese journal of mechanical engineering, 2017, 30(4): 1-12.[7]STEMME E, STEMME G. A valveless diffuser/nozzle-based fluid pump[J]. Sensors and actuators A:physical, 1993, 41(2): 159-167.[8]FORSTER F K, BARDELL R L, AFROMOWITZ M A, et al. Design, fabrication and testing of fixed-valve micro-pumps[J]. ASME Publications-FED, 1995, 234(9): 39-44.[9]张建辉. 一种带有三通式出入口的压电陶瓷泵:中国, ZL99110248. 7[P].1999-09-21.[10]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 actuators A: physical, 2007, 133(1): 128-140.[11]吴丽萍. 扁锥腔无阀压电泵理论与实验研究[D]. 长春:吉林大学, 2008.[12]黄俊,张建辉,王守印.类分形Y形分叉流管无阀压电泵的流阻分析[J].机械工程学报,2014,50(16): 193-198. HUANG Jun, ZHANG Jianhui, WANG Shouyin. Analysis of the flow resistance characteristics of valveless piezoelectric pump with fractal-like Y-shape branching tubes[J]. Journal of mechanical engineering, 2014, 50(16): 193-198.(in Chinese)[13]HUANG J, ZHANG J H, SHI W D, et al. 3D FEM analyses on flow field characteristics of the valveless piezoelectric pump[J]. Chinese journal of mechanical engineering, 2016, 29(4):1-7.[14]靳映霞,岳冠南,方新.两种信号激励下压电泵输出能力比较[J].传感器世界,2007,13(8): 19-22. JIN Yingxia, YUE Guannan, FANG Xin. Contrast of the export power of piezoelectric pump driven by two kinds of signal[J]. Sensor world, 2007, 13(8): 19-22.(in Chinese)[15]KOLAHDOUZ E M, MOHAMMADZADEH K, SHIRANI E, et al. Performance of piezoelectrically actuated micropump with different driving voltage shapes and frequencies[J]. Scientia iranica, 2014, 21(5):1635-1642.[16]穆廷荣.金属和压电陶瓷构成的两层复合薄圆板的强迫振动[J].声学学报,1984,9(5): 298-309. MU Tingrong. Forced vibration of the two-layer piezoceramic and metal composite thin circular plate with different diameter for each layer[J]. Acta acustica, 1984,9(5): 298-309.(in Chinese)[17]丁少虎, 贺西平, 李军. 复合弯曲振动压电换能器及振动分析[J]. 机械科学与技术, 2010, 29(8): 1116-1120. DING Shaohu, HE Xiping, LI Jun. Vibration analysis of a piezoelectric transducer with composite bending vibration[J]. Mechanical science and technology for aerospace engineering, 2010, 29(8): 1116-1120.(in Chinese)
