Optimization and test for rotary cup atomizer structural parameters of UAV spraying
Small unmanned aerial vehicle(UAV)pesticide application technology is developing rapidly in China.However,the spray efficiency of UAV sprayer is not stable,one important reason is the lack of specialized aviat ion nozzle.Rotary cup atomizer is not easy to be blocked,which has broad applicat ion foreground in UAV spray.In order to obtain the good spraying quality and narrow droplet spectrum aviat ion spraying centrifugal nozzle,the impact of rotary cup atomizer structural parameters on atomization property was studied.In this paper,a centrifugal atomizat ion test equipment was designed,in which a frequency converter was used to adjust the rotary speed,and a return valve was used to stable the flow rate and pressure of spray liquid.The droplet volume medium diameter(VMD)and droplet spectrum relative width(SRW)were tested by laser particle analyzer and particle analysis system.The analysis of variance and quadratic regression orthogonal test were used to optimize the structural parameters of rotary cup atomizer.The influence of rotary cup atomizer structural parameters on atomizat ion property,such as groove shape,diameter,teeth number,cone angle and height were evaluated and analyzed by using single-factor test method.The results showed that,the best optimized rotary groove shape is square; diameter and teeth number have a signif icant effect on droplet VMD and droplet SRW,while cone angle has no effect on the droplet VMD and droplet SRW,height affects droplet VMDbut does not affect droplet SRW.So diameter and teeth number were selected as the variables of quadratic regression orthogonal test,droplet VMD and droplet SRW regression model was established by using response surface analysis method.The optimized structural parameters respectively are groove shape is square,cone angle is 60°,height is 20mm,diameter is 61.5mm and teeth number is 149.Droplet VMD and droplet SRW simulat ion value respectively are 200μm and 0.562.The difference between simulat ion value and test value were 0.68%and 9.90%respectively,indicate that the regression model is accurate.The research result can provide a reference for further optimizing the structure parameters of rotary cup atomizer to meet the requirement of UAV spraying.
rotary cup atomizer atomization droplet VMD droplet SRW optimization mathematical model response surface
Zhou Qingqing Xue Xinyu Qin Weicai Cai Chen Zhou Liangfu
Nanjing Research Institute for Agriculture Mechanization,Ministry of Agriculture,Nanjing,210014,China
国内会议
广州
英文
173-184
2016-11-12（万方平台首次上网日期，不代表论文的发表时间）