UNDERSOWN UNIT OF CENTRIFUGAL SIEVE SEPARATOR Russian patent published in 2024 - IPC B07B1/22 B07B9/00 

FIELD: agriculture; machine building.

SUBSTANCE: proposed invention relates to agricultural machine building and is intended for separation of grain mixtures. Undersown unit of centrifugal-sieve separator includes a vertically arranged cylindrical sieve, a drum with upper and lower shells installed inside the sieve, grain flow guides are connected step-by-step and inclined to drum generatrix. Surface of the grain flow guides is arranged along a helical line with an increasing overlap of the pitch distance as it approaches the lower shell and makes 0.3–0.6 of their spacing at the point of attachment to it. On the upper end of the grain flow guides, parallel to the drum generatrix, there are additional flat plates protruding beyond the upper shell, the end of which is made with a bevelled edge.

EFFECT: higher efficiency of extraction of fine impurities by grain screen.

1 cl, 4 dwg