基于柔顺机构的压电式微喷点胶系统设计与性能分析  

Design and performance analysis of piezoelectric micro-spray dispensing system based on compliant mechanism

作　　者：胡俊峰[1] 梁龙 赵永祥 HU Jun-feng;LIANG Long;ZHAO Yong-xiang(School of Mechanical&Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学机电工程学院

出　　处：《光学精密工程》2019年第9期1990-2001,共12页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.51565016,51865016);江西省杰出青年人才资助计划资助项目(No.20171BCB23063);江西省自然科学基金资助项目(No.20171BAB206029);江西省教育厅科学技术研究项目(No.GJJ160612);江西理工大学清江青年英才支持计划资助项目(No.JXUSTQJBJ2018006)

摘　　要：基于柔顺机构设计了一种新型压电式微喷点胶系统,该系统由供胶装置、驱动装置和撞针阀组成。点胶系统的运动特征是利用柔顺机构的弹性变形驱动撞针往复直线运动实现撞针阀的开启和闭合,完成微喷点胶功能。采用伪刚体方法得到点胶系统的驱动力、输出位移和频率特性,结果表明,系统的最大驱动力、输出位移和频率分别为56.4 N,808μm,245 Hz,说明所设计的点胶系统能满足所需的驱动力、行程和点胶速度。制作样机,通过实验分析驱动电压信号的占空比、幅值、频率和胶液黏度对胶滴直径的影响,得到了正常胶滴形成需满足的条件。实验结果表明:系统的最高点胶频率为210 Hz,最小胶滴直径为630μm,胶滴一致性误差为5.62%,说明所设计的点胶系统具有较好的性能,为微喷点胶系统设计和应用提供新的思路。A novel piezoelectric microspray dispensing system was designed based on a compliant mechanism.The system consisted of a glue supply device,driving device,and pin-impact valve.The motion characteristic of the dispensing system was that the elastic deformation of the compliant mechanism drived the colliding needle to move in a straight line to and fro,so that the opening and closing of the colliding needle valve could perform the function of microspray dispensing.The driving force,output displacement,and frequency characteristics of the dispensing system were obtained by using a pseudo-rigid-body method.The results show that the maximum of driving force,output displacement,and frequency of the system are 56.4 N,808μm,and 245 Hz,respectively.Thus,the driving force,stroke,and dispensing speed of the dispensing system can be guaranteed.The prototype was built and the effects of duty cycle,amplitude,frequency of driving voltage signal,and viscosity of glue on the droplet diameter were analyzed experimentally;the conditions for the formation of normal droplets were also determined.The experimental results show that the highest dispensing frequency of the system is 210 Hz,the minimum diameter of the droplets is 630μm,and the consistency error of the droplets is 5.62%.In a word,the advantages of the proposed dispensing system are verified,which provides a new concept for the design and application of microspray dispensing system.

关 键 词：微喷点胶系统 柔顺机构 压电驱动器 伪刚体方法 

分 类 号：TH703[机械工程—仪器科学与技术] TN384[机械工程—精密仪器及机械]