PNEUMATIC SEPARATING APPARATUS OF GRAIN CLEANING MACHINE Russian patent published in 1996 - IPC

FIELD: agricultural engineering, may be used in flour-milling and mixed feed industry. SUBSTANCE: apparatus has two closed separating systems communicated one with the other and provided with diametrical fan. First pneumatic system has air supplying, pneumatic separating and air discharge channels, second pneumatic system has air supplying and pneumatic separating channels. First and second system are communicated through settling and air supplying chambers and through diametrical fan. Feeding device is mounted at window of both pneumatic separating channels. Outlet section of both channels is cut off by discharge valves. Contaminant discharge mechanism is positioned in lower part of settling chamber. Rotary divider is fixed on inlet edge separating air supplying channels of both systems, rotary gate is mounted on rotary portion of air supplying channel of second system. Apparatus is further provided with screen unit. Diametrical fan is positioned in lower part of apparatus. Pressure pipe of fan is connected with inlet end of air supplying channels of both systems, whose outlet end is connected with lower part of respective pneumatic separating channel. Inlet end of pneumatic separating channel of first system is connected to inlet end of air discharge channel and its end part, as well as end part of pneumatic separating channel of second system, is inserted into upper part of settling chamber, which is communicated with air supplying channels. Air discharge channel intersects air supplying channel of second system through connecting channels. Effective operation of apparatus is provided by rotating divider and gate to required position. To reduce pressure loss fan is positioned in lower part of apparatus, air supplying and air discharge channels are connected to lower part and upper section of pneumatic separating channel of first system at an angle equal or close to right angle. EFFECT: increased efficiency, reduced pressure loss and decreased usage of metal by equipping apparatus with only one settling chamber. 2 dwg