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WAYS OF INCREASING PERFORMANCE OF UNIVERSAL GRAIN CLEANING MACHINES

https://doi.org/10.26897/1728-7936-2018-3-12-16

Abstract

Basing on the main provisions of the theory of probability, the authors present some possible ways of doubling the productivity the universal air-grating separators by the implementation of the principle of dividing a processed heap into fractions. The authors take account of the difference in heap components in aerodynamic properties and dimensional characteristics as the main features to be observed in fractionation. These characteristics are implemented in the process of separation by an air flow on flat sieves. The selected features of fractionation are incorporated in the work of air-screen separators, which are the main machines of modern production lines. To determine the role of each working unit in the process of heap dividing into the main and forage fractions, the heap is conventionally divided into classes. The heap classes belonging to the forage fraction have been formed depending on the velocity of particle waving and their thickness. The formed classes can be separated with one working unit only, or two and more, taking account of the air velocity in the channels and the width of the sieve holes. Using the basic assumptions of probability theory, the authors have determined the probability of separating the individual components of each class and that of the entire heap as a whole into a forage fraction. They have also determined classes, for which there is less probability of separation. This is a class with particles having a thickness greater than the width of the holes in the sieve grids and a class having a winding speed greater than the air velocity in the pre-cleaning channel. The components of these classes will be separated only with the sorting grid and the post-screen cleaning channel. The possible ways of increasing the separation probability for these classes have been established, which increase the productivity by almost two times with a total amount of forage fraction separation of at least 60%.

About the Authors

ALEKSEI M. Giyevskiy
Voronezh State Agrarian University named after Emperor Peter the Great
Russian Federation


VYACHESLAV A. Gulevskiy
Voronezh State Agrarian University named after Emperor Peter the Great
Russian Federation


VLADIMIR I. Orobinskiy
Voronezh State Agrarian University named after Emperor Peter the Great
Russian Federation


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Review

For citations:


Giyevskiy A.M., Gulevskiy V.A., Orobinskiy V.I. WAYS OF INCREASING PERFORMANCE OF UNIVERSAL GRAIN CLEANING MACHINES. Agricultural Engineering (Moscow). 2018;(3):12-16. (In Russ.) https://doi.org/10.26897/1728-7936-2018-3-12-16

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ISSN 2687-1149 (Print)
ISSN 2687-1130 (Online)