GRAIN CLEANING MACHINE Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: grain cleaning machine has two pneumatic separating systems with settling chambers, pneumatic conveying channels and air supplying channels, fan with suction window and pressure branch pipe and grain and contaminants discharge devices. Charging devices are positioned in pneumatic separating channel walls. Fan pressure branch pipe is communicated with pneumatic separating channel of first pneumatic separating system and with additional channel. Wall of additional channel adjacent to pneumatic separating channel of first pneumatic separating system has distributing gate positioned in lower part, opposite pressure branch pipe of fan and correcting gate positioned at other end of said wall. Fan suction window is communicated with discharge window of settling chamber of second pneumatic separating system through suction branch pipe. Tree-tiered sieve shoe equipped with device for receiving products of cleaning process is positioned under pneumatic separating systems. EFFECT: increased efficiency and improved quality of cleaning grain material. 1 dwg