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噴霧機風送式環(huán)形噴管噴霧裝置設計與試驗優(yōu)化
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河北省農(nóng)業(yè)科技成果轉化資金專項（19827201D）、河北省現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術體系水果創(chuàng)新團隊項目(HBCT2018100205),、財政部和農(nóng)業(yè)農(nóng)村部：國家現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術體系項目（CARS-27）和河北省教育廳在讀研究生創(chuàng)新能力培育項目（CXZZSS2021073）


Design and Experimental Optimization of Spray Device for Air-fed Annular Nozzle of Sprayer
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    摘要:

    針對噴霧機傳統(tǒng)風送噴霧系統(tǒng)難以精準控制風量致使漂移現(xiàn)象嚴重,、藥液利用率低下的問題，設計了一種將軸流風機與環(huán)形噴頭相配合的噴霧系統(tǒng),。通過對風機風場進行計算流體力學CFD流體仿真,、對標試驗、環(huán)形噴管內(nèi)流場仿真確定了環(huán)形噴管尺寸參數(shù)與噴頭安裝位置,。設計單因素與多因素正交試驗來研究風機端口風速,、扇形噴頭型號與噴頭安裝傾角對噴霧效果的影響進而確定最佳噴霧參數(shù)組合。結果表明：環(huán)形噴管應設置在軸流風機出口端面中心位置,，3個噴頭呈120°均布在環(huán)形噴管上,；在風機氣力作用下，霧滴沉積量的峰值處于距風機端口0.5~1.5m的范圍,，風送噴霧裝置與靶標果樹的作業(yè)距離不應超過1.5m,；風機氣力有助于細化霧滴，但出口風速不宜大于等于8m/s,；噴霧總體性能與噴頭傾角呈極顯著相關（P<0.01）,，噴頭安裝傾角60°性能最優(yōu)；霧滴沉積密度隨扇形噴頭型號的增大呈先增大后減小的趨勢，霧滴的體積中值直徑隨扇形噴頭型號的增大而增大,；最優(yōu)配置參數(shù)風機風速為6m/s,、噴頭型號為02型、噴頭安裝傾角為60°,。此參數(shù)組合下霧滴沉積量為5.08μL/cm2,，表明優(yōu)化模型可靠。

    Abstract:

    Aiming at the problems that the traditional air-fed spraying system of sprayer is difficult to accurately control the air volume, resulting in serious drift phenomenon and low utilization rate of liquid medicine, a spraying system with axial fan and annular nozzle was designed. The size parameters of annular nozzle and the installation position of nozzle were determined by CFD fluid simulation, benchmarking test and flow field simulation in annular nozzle. Single-factor and multi-factor orthogonal experiments were designed to study the effects of fan port wind speed, fan nozzle type and nozzle installation inclination angle on spray effect, and then the best spray parameter combination was determined. The results showed that the annular nozzle should be set in the center of the outlet end face of the axial fan, and the three nozzles were evenly distributed on the annular nozzle at an angle of 120°. Under the pneumatic action of the fan, the peak value of fog droplet deposition was in the range of 0.5~1.5m from the fan port, and the working distance between the air spray device and the target fruit tree should not exceed 1.5m. The air force of the fan was helpful to refine the fog drops, but the outlet wind speed should not be greater than or equal to 8m/s. There was a significant correlation between the overall spray performance and the nozzle inclination （P<0.01), and the performance of the nozzle with 60° installation inclination was the best. The deposition density of droplets was increased first and then decreased with the increase of fan nozzle type, and the volume median diameter of droplets was increased with the increase of fan nozzle type. The optimal configuration parameters were fan speed of 6m/s, nozzle type of 02, and nozzle installation angle of 60°. Under this parameters combination, the total amount of droplet deposition was 5.08μL/cm2, which indicated that the optimized model was reliable.

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李建平,邊永亮,霍鵬,王鵬飛,薛春林,楊欣.噴霧機風送式環(huán)形噴管噴霧裝置設計與試驗優(yōu)化[J].農(nóng)業(yè)機械學報,2021,52(9):79-88. LI Jianping, BIAN Yongliang, HUO Peng, WANG Pengfei, XUE Chunlin, YANG Xin. Design and Experimental Optimization of Spray Device for Air-fed Annular Nozzle of Sprayer[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(9):79-88.

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  • 收稿日期:2021-05-19
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  • 在線發(fā)布日期: 2021-09-10
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