DEVICE FOR GRAIN SEPARATION BY AIR UPFLOW Russian patent published in 2011 - IPC B07B4/08 

FIELD: process engineering.

SUBSTANCE: invention relates to agricultural machinery, particularly, to grain-cleaning machines. Proposed device comprises air chamber formed by front, rear, lateral walls and screen arranged inclined from front wall to rear wall. Chamber front and rear walls have inlet and outlet openings and appliance to stabilise air flow speed over chamber depth and width. Said appliance is made up of at least two 100-160 mm-high zigzag-bent plates arranged in lines at equal distance from screen along lateral walls and interjointed at chamber depth center to make stiff structure by means of fasteners and zigzag channels. Plate zigzag curvature features uniform pitch that has steep section and flat section, flat section length being notably smaller than that of steep section. Relevant apices of all bent plates stay on one line across grain material travel. Nearest apices of adjacent bent plates are spaced apart by distance making at least 20 mm along grain material travel.

EFFECT: higher quality of grain separation, reduced losses of high-grade grain.

2 dwg