APPARATUS FOR SEPARATING GRAIN MATERIAL INTO FRACTIONS Russian patent published in 2002 - IPC

FIELD: agriculture. SUBSTANCE: apparatus has feeding hopper and air cleaning part with fan, settling chamber and aspiration channels. Grain mixture is directed from feeding hopper into first aspiration channel. Air-separated contaminants are delivered from first aspiration channel into settling chamber, and grain mixture is delivered onto three-tier sieve shoe. Grain pan is located between upper and middle tiers. Air-distributing surface is arranged in front of middle tier sieve. Channel running under mentioned surface is connected to additional fan. Grain pan is connected to air-distributing surface and tray located under upper tier sieve. Contaminants are separated from grain on sieves and grain is divided into fractions, which are subjected to cleaning procedures on successively arranged machines. EFFECT: improved quality of separating grain material into fractions and increased efficiency. 1 dwg