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THEORETICAL DETERMINATION OF THE VELOCITY OF PROCESSED MATERIAL PARTICLES IN A TANGENTIAL DEVICE FOR GRASS SEED EXTRACTION

https://doi.org/10.26897/1728-7936-2018-4-21-25

Abstract

The authors have conducted theoretical study of the movement of material particles in the space between a rotating drum surface and a tangential extraction device deck to determine the velocity of moving particles.The authors claim that to separate clover seeds from shells, it is advantageous to use a device acting under the predominant influence of friction forces. The peculiarity of the considered device for extracting grass seeds is that the movement of material and the destruction of seed shells is caused mainly by friction forces. To obtain an analytical description of the process of moving material particles in the space between the rotating deck and the drum surface and determine the velocities of particles, theoretical studies have been carried out. A hypothesis has been put forward that the necessary condition for the movement of material particles is madein case the frictional force between the drum surface and particles reaches a value sufficient to overcome the frictional forces between the particles and a fixed deck. On the basis of the proposed hypothesis the authors have obtained equations allowing to determine the values of angular and linear velocities of a material particle in the tangential device for extracting grass seeds. It has been established that the angular velocity of a particle increases along with an increase in the friction coefficient of the material relating to the drum and decreases along with an increase of the friction coefficient relating to the device deck. As the drum radius increases, the angular velocity decreases as well. The linear velocity of a particle at the inlet of the extracting device is minimal, and the maximum value is observed at the device outlet. The linear velocity increases as the drum radius increases. The equations obtained as a result of the studyallow to determine the values of angular and linear velocities of material particles enteringthe tangential device for extracting grass seeds.

About the Authors

ALEKSEI V. Aleshkin
Federal Аgricultural Research Centr of the North-East named N.V. Rudnitsky
Russian Federation


MAKSIM V. Simonov
Federal Аgricultural Research Centr of the North-East named N.V. Rudnitsky
Russian Federation


VALENTIN YU. Mokiyev
Federal Аgricultural Research Centr of the North-East named N.V. Rudnitsky
Russian Federation


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Review

For citations:


Aleshkin A.V., Simonov M.V., Mokiyev V.Yu. THEORETICAL DETERMINATION OF THE VELOCITY OF PROCESSED MATERIAL PARTICLES IN A TANGENTIAL DEVICE FOR GRASS SEED EXTRACTION. Agricultural Engineering (Moscow). 2018;(4):21-26. (In Russ.) https://doi.org/10.26897/1728-7936-2018-4-21-25

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