GRAIN CLEANING MACHINE Russian patent published in 2000 - IPC

FIELD: agricultural production, flour milling and feed mill industry, in particular, removal of contaminants from grain mixtures by air flow. SUBSTANCE: grain cleaning machine has main pneumatic separation channel, settling chamber communicated with outlet end of pneumatic separation channel, feeder, closed pneumatic system with cross-flow fan, auxiliary pneumatic separation channel communicated via its discharge end with settling chamber, which is connected with suction window of cross-flow fan disposed between and above discharge ends of pneumatic separation channels, above charging channel. Auxiliary pneumatic separation channel is connected via its inlet end through bypass channel with curved baffle of dust settler making continuation of cross-flow fan casing wall. Cross-flow fan suction window is communicated with bypass channel via control channel defined by fan casing and related congruous wall. Feeder of each channel is defined by perforated and continuous walls. Distributing gate is mounted on outer wall of pneumatic separation channel discharge end opposite cross-flow fan suction window, and regulating gate is positioned at control channel and bypass channel intersection point. EFFECT: increased efficiency and improved quality of cleaned grain material. 1 dwg