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The article is devoted to the process study of grain separation on a double-sieved separator with cylindrical shaker screens with improved orienting activity using the planned experiment. Grain cleaning is a matter of pressing concern for agricultural production, because with the increased weed infestation, the load on the machines of grain post-harvesting has increased. This article presents the elements of the planned experiment processing. The regression equation adequate at the 5% significance level is obtained. The dependences of the qualitative characteristics of the sieve boot the completeness of the separation from the variable parameters: the specific load on the working elements, the angle of inclination of the sieve holes and the oscillation frequency of the working elements are constructed. The interpretation of the processes occurring during the grain material movement on the perforated area is given. Rational design and operational parameters of the separator intensifying the separation process are determined. Conclusions on the study results are formulated. Keywords—grain purifier, separation, sieves, grain heap.

Investigational Study of Grain Separator Operation with Cylindrical Shaker Screen of Improved Orienting Ability