GRAIN-CLEANING MACHINE Russian patent published in 2011 - IPC A01F12/44 

FIELD: agriculture.

SUBSTANCE: grain-cleaning machine contains an inlet chamber with a feeding roller, an air cleaning part, an upper and a lower sieve pans and settling chambers with augers. The air cleaning part contain pre-sieve and after-sieve aspiration pneumatic ducts and air flow adjustment valves. Each sieve pan has an upper and a lower tiers of sieves. Between the sieves of the lower sieve pan a tray is installed that is adjustable in terms of length. The after-sieve aspiration pneumatic duct consists of two parts divided with a vertical partition. The first part of the after-sieve aspiration pneumatic duct is connected to the outlet part of the lower pan upper tier while the second part is connected to the outlet part of the said pan lower tier.

EFFECT: improved quality of grain material separation into fractions.

1 dwg