Abstract
At the present stage of development of technologies for growing agricultural crops, the technological operation of spraying remains relevant. This method performs chemical protection of plants and their nutrition as well. Bar sprayers are still the main machines. The final result - crop yield depends on the technical efficiency of spraying. Other factors that need to be maintained in chemical protection include compliance with the rate of outflow per unit target area. Based on this, the factors that affect the technical efficiency of spraying were analyzed. Among them, the influence of the position of the rod on compliance with the rate of outflow of the working solution per unit area is highlighted. To realize the purpose of the work, which is to find the allowable amplitude of oscillation of the rod, an analysis of a number of literature sources was done. From there, the link between the height of the rod above the treatment object and the pour rate is established. Based on the obtained criteria, a model is constructed, which connects the height of the bar installation above the cultivated area and the quantitative flow through the spraying device per unit of processing area. The implementation of the model is a numerical experiment, which allowed to obtain the percentage numerical values of the uneven coverage of the processing area. Such results were obtained for models that simulate spraying of areas with continuous application of the working solution and treatment of row crops. According to calculations, the following results were obtained. When continuous application of the working solution and the use of sprays with a spray angle , the minimum installation height of the bar above the workpiece must be ≥0,15 m; for sprayers with – height ≥0,15 m. When processing row crops with rows of 0,45 m and the width of the effective area of spraying 0,15 m, we will have: for sprays the minimum optimum height of installation of a bar is 0,6 m – amplitude ±0,045 m; for sprayers with – 0,43 m ±0,04 m. When processing row crops with rows of 0,7 m and an effective spraying area of 0,3 m, we will have: for sprays the minimum optimum height of installation of a bar is 0,6 m – amplitude ± 0,08 m; for sprayers with – 0,6 m.
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