Justification of the parameters of the mixer of the rotary treater for layer-by-layer treatment of seeds

Abstract

Purpose. Increasing the efficiency of the use of pesticides by substantiating the parameters of the mixer of the batch-type rotator for layer-by-layer treatment of seeds, which will ensure the improvement of the quality of seed treatment and ecological safety of the environment. Methods. The study used an analytical and experimental method using Microsoft Office and Mathcad software environments. Results. An analytical expression was obtained for determining the dynamic criterion of the mixer’s operating mode, as a necessary condition for the implementation of the work process of the batch-type rotator for the layer-by-layer treatment of seeds, based on which the analytical dependence of the mixer’s angular speed on its design parameters and the seed friction coefficient was established. The regression equation was obtained, which describes the shape of the shape of the mixer, which makes it possible to justify the main structural and kinematic parameters of the rotary seed treater. Conclusions. A mathematical relationship was obtained that describes the relationship between the design parameters and the operating modes of the mixer of the rotary seed treater, which ensure the movement of seeds up the working surface of the mixer in the field of action of centrifugal forces. It was theoretically established that the stable movement of seeds along the inner working surface of the rotary seed treater mixer with grain friction coefficients from 0.15 to 0.45 at angles of inclination of the tangent to the productive side surface of the mixer to the axis of rotation in the range from 30º to 40º is ensured at an angular speed of the mixer from 10 rad/s to 35 rad/s and the radius of the lower base of the mixer from 0.1 m to 0.3 m. Based on the results of experimental studies, a regression equation was obtained that describes the shape of the rotary seed treater mixer, which makes it possible to substantiate its main structural and kinematic parameters. Keywords: portion of seeds, seed treater, layer-by-layer processing, protective-stimulating-nutritious preparations.