GRAIN HARVESTER PRECLEANER Russian patent published in 2005 - IPC

FIELD: agricultural engineering.

SUBSTANCE: proposed device includes delivery board and inlet hole of aspiration channel arranged at end zone of board. Channel is provided with deposit chamber with automatically opening valve located over front part of stacker bottom. Suction fan with discharge nozzle pointed into stacker is arranged in rear part of aspiration channel. Bar screen tilted to side of tailings auger is arranged under delivery board. Bars are made with cross section in form of equilateral triangle. With tailings slipping off delivery boards in end zone, light impurities sucked through inlet hole into aspiration channel settle in deposit chamber. Impurities accumulated in chamber are discharge through valve into stacker. Grain and tailings drop onto bar screen. Grain passes between bars and is delivered by grain auger into hopper. Tailings slide along screen and are delivered by tailings auger into return thresher.

EFFECT: improved separations of grain in grain harvester.

2 cl, 3 ex, 2 tbl, 4 dwg