GRAIN CLEANING MACHINE Russian patent published in 2002 - IPC

FIELD: agricultural engineering. SUBSTANCE: grain cleaning machine has pneumatic separating channel, receiving part made in the form of feeder with guiding grid, settling chamber and fan. Aspiration channel under feeder is communicating with pneumatic separating channel. Pneumatic separating channel upper end is communicating with suction part of fan whose waste gas diffuser is connected via baffle-type inlet opening with settling chamber. Pneumatic chamber with window is adapted for supplying air under guiding grid. Grain mixture to be cleaned is directed through feeder onto guiding grid and into pneumatic separating channel. Grain mixture is disintegrated on guiding grid by air flow, light contaminants are separated from grain mixture in pneumatic separating channel and discharged to fan and further into settling chamber. Grain cleaned in pneumatic separating channel is discharged outside through clean grain receiver. Upper end of pneumatic separating channel is connected with suction part of fan and lower end with aspiration channel. Such construction reduces length of air tract. EFFECT: increased efficiency, reduced metal usage and decreased aerodynamic resistance. 1 dwg