Acta Univ. Agric. Silvic. Mendelianae Brun. 2018, 66, 677-683
Published online 2018-06-28

Study of Extra Cleaning of Rapeseeds in an Electric Frictional Separator

Stepan Kovalyshyn, Oleksiy Shvets

Faculty of Mechanics and Power Engineering, Lviv National Agrarian University, Ukraine

The work is devoted to the study of the process of additional cleaning of rape seeds on an electric frictional separator, where an inclined plane moving in electric field acts as the working body. Theoretical studies have established that effective cleaning of this culture occurs when the trajectories of motion and the coordinates of the ascension of the components of the seed mixture from the separation plane differ as one another. As a result of the experiments, it was established that the main factors influencing the movement of components of the seed mixture of rape along the separation plane of the electric frictional separator and their orientation are the angle of inclination of the separation plane in the space α (deg.), its velocity VП (m/s), and electric field strength E (kV/cm). As a result of the research it was established that the maximum difference of the coordinates of the ascension of components of a seed mixture of rape from the separation plane can be reached at its angle of inclination in the space α = 9 deg., its velocity VП = 0.07 m/s and the intensity of the electric field E = 1.8...2 kV/cm. Of the factors mentioned above, the most significant influence on the behavior of rape seed on the separation plane and their coordinate is the magnitude of the electric field intensity in the working area of the separator. The mathematical expressions for determining the basic geometric dimensions of the separation plane of the electric friction separator are identified in this work, which are one of the necessary conditions for the working out and design of the construction of its industrial sample.


The presented work was performed in accordance with the research development “Development of new technologies and technical means for the preparation of small-seeded mixtures with the help of controlled electromagnetic actions” (state registration number: 0117 U 003081). Funded by the Ministry of Education and Science of Ukraine.


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