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Design and test of a novel crawler-type multi-channel air-assisted orchard sprayer

International Journal of Agricultural and Biological Engineering 2020年第6期13卷 60-67页

作者： Wei Qiu Xiaolong Li Chongchong Li Weimin Ding Xiaolan Lv Yande Liu College of Engineering Nanjing Agricultural UniversityNanjing 210031China Jiangsu Academy of Agricultural Sciences Nanjing 210000China Co-Innovation Center of the Intelligent Management and Equipment for Orchard on the Hilly Land in South China Nanchang 330013China

In order to solve the problem of poor traveling stability and excessive pesticide application during plant protection operations in hilly orchards,a novel crawler-type multi-channel air-assisted sprayer that is particularly appropriate for hilly orchards was designed in this *** anti-rolling requirements and the orchard environment in hilly areas,this study selected limits for uphill and downhill rolling angles as well as the transverse rolling angle as the evaluation indexes for determining both the layout and parameter settings of the *** to freely submerged jets and the requirements in plant protection operation,a multi-channel air-assisted system was *** test results showed that the anti-rolling performance and the designed air-assisted system were *** 2 m from the longitudinal center plane of the sprayer,the airflow exhibited wavy distribution patterns under different parameter combinations since the four streams of the airflow were not thoroughly intersected and *** 3 m from the longitudinal center plane of the sprayer,the jet was ejected at great velocity but underwent rapid attenuation;the airflow velocity in most areas barely satisfied the requirements for plant protection *** addition,different air outlet layout schemes led to significant differences in the spatial distribution of the airflow *** with a traditional air-assisted sprayer,using the developed multi-channel air-assisted sprayer enhanced the droplet coverage uniformity by 19.4%,and the mean droplet deposition in the front,middle,and rear of the canopy was enhanced by 32.9%,50.3%,and 78.1%,respectively,while reducing ground deposition and air drift by 26.8%.

关键词： fan dual-flow-channel plant protection air-assisted test

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