MATHEMATICAL MODELING OF THE GRAIN MATERIAL SEPARATION IN THE PNEUMATIC SYSTEM OF THE GRAIN-CLEANING MACHINE

Ildar Badretdinov; Salavat Mudarisov; Marat Tuktarov; Elizabeth Dick; Svetlana Arslanbekova

Ildar Badretdinov Bashkir State Agrarian University
Salavat Mudarisov Bashkir State Agrarian University
Marat Tuktarov Bashkir State Agrarian University
Elizabeth Dick Bashkir State Agrarian University
Svetlana Arslanbekova Bashkir State Agrarian University

Keywords: process modeling, grain pile separation, pneumatic system, grain cleaning machine, Mathematical Model,

Abstract

The article presents the results of a study of a high-performance grain cleaning machine for the preliminary cleaning of grain pile with a closed aspiration system. The flow regimes of the “air-grain pile” mixture determined by the Reynolds number and the bulk concentration of particles are established. As a result of the modeling, further directions for improving pneumatic systems of grain cleaning machines were determined: the cleaning efficiency of the Е₀ fraction of pure grain from light impurities, shriveled and crushed grain reaches 82%, the output cleanliness of the grain was 93.7%, and the loss of full grain to waste P_z = 0,017%. The average speed of the air flow in the separating channel is U = 7.12 m / s, its coefficient of variation across the width of the separating channel is v = 12,7%. The results of the experimental data confirmed the adequacy of using mathematical modeling of the air flow in the pneumatic system of a grain cleaning machine to substantiate the basic parameters of the pneumatic system.

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