JUSTIFICATION OF THE DIMENSIONS OF THE SLIDE-LIKE ELECTRIC FRICTION SEPARATOR SURFACE FOR SEPARATION OF WINTER PAPESEED
Keywords:
electric friction separator, surface length, winter rapeseed, separationAbstract
The article presents the results of the development of the theoretical determination of the optimum dimensions
of the surface of the electric friction slide-like separator for the parting of difficult-to-separate impurities or poor-
quality (fragile, with different degrees of shell damage) seeds from the seed mixture.
On the basis of a theoretical analysis of possible cases of the movement of particles of seed mixtures along a
moving inclined surface with an electric field superimposed on it, it was established that the determining parameters
that affect the path traveled by the seeds up or down the separator web, are the seeds, the angle of inclination of the
plane α, the movement velocity V e , the radius r, the mass m of the seed and the value of the electric force F e , as a result
of the impact of the applied electric field. It is thanks to the additional impact of the electric force that it becomes
possible to significantly reduce the distance of low-quality seeds rolling along the surface and increase the path they
travel along with the surface in the direction of its movement.
The obtained analytical dependences make it possible to determine the minimum distance from the edge of the
surface to the line of seed supply to it. For technological reasons, these distances should be increased due to the fact
that they may come into contact with seeds that roll down, and due to the presence of rounded areas at the ends of the
operating area of the surface, formed by the location of drive and tension rollers of a certain diameter.
As a result of the research, it was established that in order to carry out the technological process of rapeseed
separation with the intention to separate low-quality (weak and of different damage degress) seeds, the working length
of the surface of the electric friction slide-like separator should be 0.6 m.
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