THE EFFECT OF GRAIN HEAP MOVEMENT TYPE IN THE HORIZONTAL CYLINDER SEIVE ON THE INTENSITY OF SEPARATION PROCESS

Abstract

The new technique is proposed to estimate the process of grain heap separation in a horizontal cylinder sieve that allows to determine the separation coefficient and detect small admixtures completely in dynamics, admixtures are detected after each 5–10 simultaneously for each of the 12 sites in the sieve surface. The experimental data obtained from this technique allow to have the following questions answered. How much time does it take for the grain to be in the working part in order to obtain the completeness assigned for admixture detecting? In which part of the sieve surface can admixture be detected? What is the way the grain heap movement mode in the sieve influences the intensity of the separation process? The paper provides the experimental data on identifying the completeness of admixtures detection and the coefficient of the separation process intensity for the cylinder sieve following the rolling, shuttle-rolling, mixed and new grain portion movement mode, designed by the authors, in different cultivars and with different levels of its being filled with grain [1]. The experiments showed that the most intensive separation process runs when grain heap movement by portions mode in the cylinder sieve where the coefficient of sieve surface utilization constitutes over 0.75, but the cinematic mode of the sieve is within 1.5–2.