FIELD: engines and pumps.
SUBSTANCE: device contains a clearing fan provided with, at least, one additional outlet to force air to transfer harvested mass onto the following clearing element of the sifting device. An air duct closed on its sides is arranged under preparatory pallet passing, at least, along a part of length and along a part of width of the said pallet. The air dust is connected to the blower fan additional outlet. The air duct inlet and outlet are actually located in one plane. Within the outlet, the air duct inner space profile, first, downs and, then, rises towards the aforesaid duct outlet.
EFFECT: uniform air flow and concentrated adjustable direction of this flow.
10 cl, 2 dwg
