Abstract
The purpose of the study is to improve the efficiency of sieve cleaning by justifying the kinematic mode of operation and a rational scheme for the distribution of sieves in mills, depending on their purpose. Raw combine heaps of winter wheat of the “Alaya Zarya” variety and barley of the “Priazovsky 9” variety were used as grain material. The conducted research allows us to justify the angles of inclination of the ear sieves, which should be located in the upper tier with an angle of inclination to the horizon of 7° and be equipped with lattice cloths with round holes (a diameter of 7.5 or 8.0 mm). The frequency of oscillation of the sieve mill must be selected in the range of 340-370 min-1, which provides the maximum completeness of the selection of feed fractions by sorting sieves. In one tier in length, preference should be given to the placement of three lattice cloths.
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