GRAIN CLEANING MACHINE Russian patent published in 2004 - IPC

FIELD: agricultural engineering, in particular, grain cleaning and sorting machines.

SUBSTANCE: grain cleaning machine has feeding chamber, waste discharge device and clean grain discharge device, aspiration channel arranged upstream of sieve shoe and equipped with air flow speed regulating mechanism, aspiration channel arranged downstream of sieve shoe, and two sieve shoes with pans. Aspiration channels are connected with settling chamber. Second sieve shoe has two tiers of sieves. First sieve shoe has second tier of sieves provided with grain guides. First and second tiers of second sieve shoe are equipped with longitudinal partition walls. Aspiration channel is arranged downstream of sieve shoe and is equipped with longitudinal partition and device for introducing grain from right-hand and left-hand halves of aspiration channel. Discharge parts of second tier and tray of first sieve shoe are communicated respectively with inlet parts of right-hand and left-hand halves of first tier of sieves of second sieve shoe through grain guides. Discharge parts of right-hand and left-hand halves of second tier of sieves of second sieve shoe are communicated respectively with devices for introducing grain of right-hand and left-hand halves of aspiration channel arranged downstream of sieve shoe.

EFFECT: improved quality of grain cleaning and separation thereof into fractions with different kinds of contaminants.

3 dwg