Dependence of separation of grain on its elasticity

Abstract

Grain moisture affects this property as elasticity. This indicator of the quality of the processed material allows to regulate the process of separation of grain mixture, influencing the efficiency of use of energy resources, which are used for drying grain. In the process of separation of grain mixture on moisture content (firmness) is used the effect of coefficient of restitution on the angle and speed of the rebound of the grains after hitting the reflective surface, inclined at an angle to the horizon. The best result in the separation of grain mixtures is observed when the angle of rebound of the grains from the reflective surface to the horizon 45°. In order to achieve this effect, it is necessary to determine the optimum tilt angle of the reflective surface to the horizon depending on the moisture of corn in the grain mixture. For elastic solids, the coefficient of restitution is equal to one. Theoretical researches, analysis of experimental data allowed to establish that the angle of inclination of the reflecting surface to the horizon from the wet grains equal 22°30', which corresponds to the case of perfectly elastic collision, when the angle of incidence equals the angle of reflection.