基于减小有效长度的旋动射流混药器结构参数优化  

Structural parameters optimization of swirling jet mixer based on reducing effective length

作　　者：宋海潮[1,2] 徐幼林[1] 郑加强[1] 代祥[1] Song Haichao;Xu Youlin;Zheng Jiaqiang;Dai Xiang(College of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing 210037,China;College of Mechanical Engineering,Nanjing Institute of Industry Technology,Nanjing 210023,China)

机构地区：[1]南京林业大学机械电子工程学院,南京210037 [2]南京工业职业技术学院机械工程学院,南京210023

出　　处：《农业工程学报》2018年第8期62-69,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：2015江苏高校优秀科技创新团队(物联智造技术2015SJTD-01);2016江苏省精密制造工程技术研究开发中心开放基金(ZK16-01-01);江苏省333高层次人才培养工程资助项目;江苏高校品牌专业建设工程资助项目(PPZY2015A087);2015南京工业职业技术学院实验实训设备专项(YK15-01-03)

摘　　要：旋动射流混药器的主要组成部件是收缩管和扩散管,当收缩度和扩散度确定后,混药器有效长度的影响因素即为收缩管的收缩角、混合管长度和扩散管的扩散角。该文采用三因素三水平正交试验分析收缩角(19?、22?和25?)、混合管长度(20、12和8 mm)和扩散角(10?、14?和18?)对旋动射流混药器有效长度的影响。结果发现:3因素的P值分别为0.206、0.004和0.025,混合管长度对旋动射流混药器混合均匀性影响最显著,其次是扩散管扩散角,而收缩管收缩角对混药器混合均匀性没有显著影响;通过对测试的混药器在线混合采集图像均方根误差分析,发现在保证对脂溶性农药均匀混合的前提下,旋动射流混药器有效长度值可为69 mm,此时收缩角为25?,混合管长度为20 mm,扩散角为18?,分流器采用切向进流。The pesticide solutions include both fat soluble and water soluble.The permeability of fat soluble pesticides is greater than that of water soluble pesticides.So its infiltration effect is better than that of water soluble pesticides.It is necessary to break up the oil into a fine oil bead by the intense mechanical agitation when fat soluble pesticide mixed with water.However,the emulsion oil droplet dispersion degree is not high.During the storage period,it is very easy to produce oil beads and break the emulsion,and after that,it’s hard to recover.Inline mixed pesticides can reduce the harm of pesticides to operators,the environment,and non-target organisms.At present,the mixed pesticide is mainly mixed with water soluble pesticides.It is difficult to study the inline mixing of fat soluble pesticides due to their insolubility in water.The purpose of this study was to determine the effective length of the mixer under the condition of uniform mixing of fat soluble pesticide(rapeseed oil).Comparative analysis was made for the different diffusion angle,different injection methods,different contraction angle,and different mixing tube length.The main components of swirling jet mixer were shrink tube and diffuser.When the shrinkage and diffusivity were determined,the influencing factors of the effective length of the mixer were the contraction angle,the length of the mixing tube and the diffusion angle of the diffuser.Structure parameters of the mixer were optimized by orthogonal experiments with three factors and three levels,including the contraction angles of 19°,22°and 25°,the mixing tube length of 20,12 and 8 mm,and the diffusion angle of 10°,14°and 18°.To confirm the content of the study,the experiments were conducted in which the fluorescent tracers were mixed with the pesticides to enable the camera to track the mixing process in the transparent chamber.According to different physical and chemical properties of pesticides,rapeseed oil was used as substitute for fat soluble pesticide,and it was added wi

关 键 词：农药 优化 试验 混药器 脂溶性农药 有效长度 混合均匀性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] S482[自动化与计算机技术—计算机科学与技术]