压电泵泵体出入口结构对输出性能的影响
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摘要
为了提高微小型主动阀压电泵的输出性能,通过对流量计算公式的分析,推导出了影响流量的两个主要因素:阀口开度hv和阀口厚度w。利用有限元仿真分析软件ANSYS进行模拟流场的流动,分析了当hv和w不同时,阀口处流场的分布情况,也分析了在流速、阀口开度和阀口厚度的影响下,压强的损耗情况。在理论基础上制作了3个不同hv和w的压电泵的样机并进行了试验,试验结果表明,在hv=50μm,w=200μm,驱动电压为50V时,其输出流量达到最大值为40mL/min。
In order to improve the output performance of the micro-active valve piezoelectric pump,through the analysis of the flow calculation formula,two main factors influencing the flow are deduced:the valve opening hvand the port thickness w.The finite element simulation software ANSYS is used to simulate the flow of the flow field.The distribution of the flow field at the valve port is analyzed when hvand ware different.The loss of pressure is also analyzed under the influence of flow velocity,valve opening and valve port thickness.Based on the structure and working principle,three piezoelectric pumps with different valve opening and valve port thickness were fabricated and tested.The test results show that the output flow reaches the maximum of 40 mL/min when the valve opening hvis50μm,the port thickness wis 200μm and the driving voltage is 50 V.
In order to improve the output performance of the micro-active valve piezoelectric pump,through the analysis of the flow calculation formula,two main factors influencing the flow are deduced:the valve opening hvand the port thickness w.The finite element simulation software ANSYS is used to simulate the flow of the flow field.The distribution of the flow field at the valve port is analyzed when hvand ware different.The loss of pressure is also analyzed under the influence of flow velocity,valve opening and valve port thickness.Based on the structure and working principle,three piezoelectric pumps with different valve opening and valve port thickness were fabricated and tested.The test results show that the output flow reaches the maximum of 40 mL/min when the valve opening hvis50μm,the port thickness wis 200μm and the driving voltage is 50 V.
引文
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[2]吴博达,林敬国,曾平,等.压电泵增频流量骤减现象的解释[J].压电与声光,2006,28(5):588-590.WU Boda,LIN Jingguo,ZENG Ping,et al.Interpretation to pump’s flow rate decrease when working frequency add[J].Piezoelectrics&Acoustooptics,2006,28(5):588-590.
[3]董景石.微型精密压电泵设计理论及其应用技术研究[D].长春:吉林大学,2012.
[4]程光明,冯丽娜,曾平,等.泵用压电振子与泵腔体积变化的测试研究[J].排灌机械工程学报,2012,30(4):412-416.CHENG Guangming,FENG Lina,ZENG Ping,et al.Experimental study of piezoelectric vibrator deformation and cavity volume fluctuation of piezoelectric pump[J].Journal of Dralnage and Irrlgation Machinery Engineering,2012,30(4):412-416.
[5]黄丹,马玉婷,潘巧生,等.中间固定式双压电晶片大流量压电泵的研究[J].压电与声光,2016,38(3):372-376.HUANG Dan,MA Yuting,PAN Qiaosheng,et al.Research on large flow-rate piezoelectric pump powered by centrally clamped bimorph actuator[J].Piezoelectrics&Acoustooptics,2016,38(3):372-376.
[6] WANG Jiantao,LIU Yong,SHEN Yanhu,et al.A Resonant piezoelectric fiaphragm pump transferring gas with compact structure[J].Micromachines,2016,7(12):219.
[7] JIANF Delong,CHENG Guangming,SUN Xiaofeng,et al.Performance analysis and experimental study on delivery fluid of double-chamber piezoelectric pump in parallel[J].Journal of Xi’an Jiaotong University,2010,4(3):82-85.
[8] MA H K,CHEN R H,HSU Y H.Development of a piezoelectric-driven miniature pump for biomedical applications[J].Sensors&Actuators A Physical,2015,234:23-33.
[9]程光明,李鹏,杨晓东,等.主动阀压电泵的设计[J].排灌机械工程学报,2007,25(5):1-4.CHENG Guangming,LI Peng,YANG Xiaodong,et al.Design for piezoelectric pump with active valve[J].Journal of Dralnage and Irrlgation Machinery Engineering.2007,25(5):1-4.
[10]何丽鹏.微小型主动阀压电泵的结构设计理论及控制系统的研究[D].长春:吉林大学,2010.
[11]程光明,何丽鹏,曾平,等.单晶片主动式放大阀压电泵的设计与实验研究[J].压电与声光,2010,32(4):578-581.CHENG Guangming,HE Lipeng,ZENG Ping,et al.Design and experimental research on the piezoelectric pump with hydraulic pressure magnification on valve and unimorph actuator[J].Piezoelectrics&Acoustooptics,2010,32(4):578-581.
[12]程光明,朱志伟,曾平,等.压电泵自适应神经网络预测控制的仿真研究[J].压电与声光,2010,32(5):870-873.CHENG Guangming,ZHU Zhiwei,ZENG Ping,et al.Research on simulation of adaptive neural network predictive control of piezoelectric pump[J].Piezoelectrics&Acoustooptics,2010,32(5):870-873.
[13]曾平,李立安,胥锋,等.无阀压电泵的流固耦合仿真及试验验证[J].光学精密工程,2016,24(1):112-118.ZENG Ping,LI Li’an,XU Feng,et al.Structural-fluid coupling simulation and experimental verification on valveless piezoelectric pump[J].Optics and Precision Engineering,2016,24(1):112-118.