GRAIN CLEANING MACHINE Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: grain cleaning machine has feeding chamber with feeder positioned therein, device for separating and discharge of large-sized and straw-like contaminants, and closed pneumatic system including pneumatic separating channel, which is communicated through feeding window to feeding chamber under said device, settling chamber, fan, air supply channel equipped with air flow rate regulator and adapted for communicating settling chamber through fan to pneumatic separating channel, cleaned grain and light contaminants discharge devices. Wall, which separates pneumatic separating channel from feeding chamber, has portion arranged above feeding window and made baffle-type, and is provided in its upper part with window. Device for separating and discharging of large-sized and straw-shaped contaminants is positioned opposite said window and oriented thereto with its discharge side. Said device is inclined in the same direction as pneumatic separating channel, which is communicated under discharge end of feeding window via bypass channel terminating in site under lower part of said device with window provided with guiding plates. EFFECT: improved quality of grain, reduced metal usage and improved working conditions for personnel. 1 dwg