AIR-OPERATED SYSTEM FOR GRAIN-CLEANING MACHINE Russian patent published in 2007 - IPC B07B4/02 A01F12/44 

FIELD: agriculture mechanical engineering.

SUBSTANCE: air-operated system comprises air-separating passage for primary cleaning having closed air circulation, air-separating passage of the secondary cleaning connected with the atmosphere, two settling chambers, diametrical fan, devices for supplying of the grain mixture and discharging its fractions, mechanisms for control of air velocity in the air-separating passages, and dust trap with transverse air supplying passage that has constant cross-section and is provided with inlet slot of variable width and outlet branch pipe. The transverse air discharging passage of constant cross-section of the dust trap is provided with two same outlet branch pipes. One of the branch pipes is covered with a lid. The inlet slot of variable width receives the detachable deflector.

EFFECT: expanded functional capabilities.

3 dwg