期刊论文

Design of online mixing system and performance test of mixed pesticides for the plant protection machine

中文

湖南农业大学学报(自然科学版)

1007-1032

2020

46

2

236-242

10.13331/j.cnki.jhau.2020.02.017

2017YFD0700903-2:教育部重点研发计划项目 2018NK2063:湖南省科学技术厅重点研发计划项目 2019NK2141:教育厅项目

本校为第一机构

为提高植保机喷雾作业中的农药利用率,设计了一种在线混药系统。混药系统主要包括取水单元、取药单元、混合器和控制单元。系统工作时,控制单元控制取水单元和取药单元抽取水溶液和农药,注入混合器混合,混合液经隔膜泵加压后经过喷头喷施。基于计算流体力学理论,建立内置7块扰流板且注药口和注水口沿边壁垂直分布并正对第1块扰流板的圆柱形静态混合器模型,运用Fluent软件对模型进行数值分析,结果常压(0.1 MPa)时,混合器出口处药水混合均匀性变异系数为2.2%,药水混合效果最佳,但注药口有药剂回流现象,故提出药剂加压的模拟方案。药剂加压1 MPa时,注药口无药剂回流现象,药水混合均匀性变异系数为2...

An online mixing system was designed to improve the effective utilization of pesticides in spray operations. The pesticide mixing system mainly includes a water taking unit, a pesticide taking unit, a mixer and a control unit. When the system is working, the control unit controls the water extraction unit and the pesticide extraction unit to extract the required dose of the water and the pesticide into the mixer. The mixed liquid is pressurized by the diaphragm pump and sprayed by the nozzle. Based on the theory of computational fluid dynamics,...