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nozzle test system for droplet deposition characteristics of orchard air-assisted sprayer and its application

International Journal of Agricultural and Biological Engineering 2014年第2期7卷 122-129,I0003页

作者： Zhai Changyuan Zhao Chunjiang Wang Xiu Li Wei Li Wei Zhu Ruixiang College of Mechanical and Electronic Engineering Yangling 712100ShaanxiChina Northwest A&F University Yangling 712100ShaanxiChina National Engineering Research Centre for Information Technology in Agriculture Beijing 100097China

In order to obtain nozzle droplet deposition characteristics for sprayer mechanical design and variable spraying control algorithms,a nozzle droplet deposition characteristics test system for air-assisted spraying was *** test system can supply a stable wind site with precisely controlled air speed whose speed control ranges from 2 m/s to 16 m/s with maximum relative error of 4.5%.It can spray out a certain amount of liquid pesticide with adjustable spraying pressure which can be controlled with high precision while the maximum relative error is only 1.33%.The distribution of droplet deposition can be collected and measured by using the acquisition device and a pesticide deposition optical measurement *** experiment of two-dimensional nozzle flow measurement was carried *** results show that nozzle flow distribution is uniform and symmetric with“double-hump”shape in the spray ***-nozzle overlapped droplet deposition ranges from 85%to 116%relative to the *** nozzle droplet deposition experiment was *** experiment results show that in air-assisted spraying,the higher the wind speed,the less droplet deposition is affected by *** the wind speed is higher than 12 m/s and spraying distance is 0.80 m,droplet deposition is concentrated on the originally designated point and hardly affected by *** horizontal spray width becomes smaller with higher wind *** the wind speed is high,it can be considered that nozzle deposition only focuses on the nozzle center,if the position requirement is not very high in orchard spraying.

关键词： air-assisted spraying orchard sprayer flow distribution droplet deposition nozzle test system characteristics test system

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