CENTRIFUGAL-PNEUMATIC SEPARATOR OF GRAIN MATERIAL Russian patent published in 2017 - IPC B07B7/83 

FIELD: agriculture.

SUBSTANCE: centrifugal-pneumatic separator of grain material contains an annular pneumatic separating channel with a lower branch pipe for airflow inlet and cleaned grain material outlet, a loading inlet branch pipe for the grain material to be cleaned, an outlet branch pipe for exhaust air with light impurities, a rotational conical spreader equipped with an adjusting damper for feeding the grain material into the pneumatic separating channel and equipped with several cones fixed to the common shaft at some distance from each other and having on the bottom, with the exception of the lower one, a central opening. The upper cone has the largest diameter of the cone and the opening, and the subsequent cones in the direction from top to bottom have gradually decreasing diameters. The annular pneumatic separating channel consists of the upper, middle (main) and lower parts. The main part is formed by coaxially located the outer and the inner cones, which are diffusers (in the direction from top to bottom). Their larger base is placed below at approximately the same height. The angle between the generatrices in the longitudinal diametrical cross-section of the outer cone is less than the analogous angle of the inner cone. The height of the outer cone is larger than the height of the inner one.

EFFECT: improving the cleaning quality and reducing grain losses.

1 dwg