GRAIN COMBINE HARVESTER Russian patent published in 2014 - IPC A01F12/44 A01F12/48 

FIELD: agriculture.

SUBSTANCE: invention relates to the agricultural machinery industry and can be used in cleaning systems of grain combine harvesters. The grain combine harvester comprising fan mechanism for creation of air flow directed through the cleaning mechanism for separation of the chaff from the grain. The fan mechanism comprises a plurality of fan modules for creation of auxiliary air flows separated from each other. The cleaning mechanism comprises an additional air inlet 44 located between two adjacent ancillary air flows, and the means of the channel narrowing of each auxiliary flow in the form of vertical baffles 52 located next to the additional air inlet 44. Narrowing of the channel is used to create a low pressure area (due to the Venturi effect).

EFFECT: low pressure area draws air directly from the environment into the air flow through the additional air inlet 44, thereby reducing the transverse component of the auxiliary flows and ensuring more uniform flow of air through the cleaning mechanism.

12 cl, 6 dwg