ВЗАИМОСВЯЗЬ КАЧЕСТВА ТРИЕРНОЙ ОЧИСТКИ ЗЕРНА С РЕЖИМАМИ РАБОТЫ И НАСТРОЕЧНЫМИ ПАРАМЕТРАМИ

Abstract

The possibilities of reducing residual grain contamination and technological losses were investigated. The relationships between the qualitative indicators of the trier's operation and the speed of rotation of the cylinder, the parameters of the circulating segment and the setting of the output tray during the experiment with interval evaluation were established. The studies were carried out using a cyclic stand, which ensures the replacement of the traditional spatial physical model with a temporary one and a radical increase in the effectiveness of the experiment. The nature of the change in the process over time and the length of the cellular cylinder, which can be divided into three characteristic sections, has been established. In the first section, the intensity of the release of grains of the main crop increases linearly for all values of the mass of the circulating segment. It was found that the higher the mass of the circulating segment, the lower the initial value of the intensity of the release of grains of the main crop due to the predominance of the dynamic “eating” effect, and the period of stabilization of the process is longer. In the second section, the maximum value of the intensity of the release of grains of the main crop is achieved with circulation in the segment of 4 - 5 layers of grain and the predominance of the effect of inertial retention of the contacting layer. In the third section, the intensity of the release of grains of the main crop decreases parabolically identically for all mass values of the circulating segment at a given rotation frequency of the mesh cylinder and the angular position of the output tray. It has been established that when the rotation speed increases to 35 rpm, the initial contamination of the grain mixture has virtually no effect on the degree of release. The regulated level of technological losses of less than 5% at a tray installation angle of 40° is ensured by a high-speed operating mode of 40 rpm. The intensity of the emission of impurity particles into the output tray is proportional to the initial contamination of the grain mixture and the time of movement of the segment along the mesh cylinder. With an increase in the installation angle of the output tray in the range of 20° - 40°, the intensity of the emission of impurity particles decreases by 3.8 - 5.0 times.