DOI: 10.5937/jaes17-22640
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions.
Volume 17 article 641 pages: 529- 534
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 effi ciency 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 Pz
= 0,017%. The average speed of the air fl ow in the separating channel
is U = 7.12 m/s, its coeffi cient of variation across the width of the separating channel is v = 12,7%. The results of the
experimental data confi rmed the adequacy of using mathematical modeling of the air fl ow in the pneumatic system
of a grain cleaning machine to substantiate the basic parameters of the pneumatic system.
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