SYSTEM FOR CLEANING A FLOW OF HARVESTED CROP

The invention relates to a system for cleaning a flow of harvested crop, said system comprising a conveyor (9) arranged to convey said flow downstream of said conveyor into a cleaning zone (Z) into which said flow is intended to be discharged, and a suction cleaning unit (10) located above said cleaning zone and operable to generate an upward air flow through said cleaning zone for extracting residues (L) contained in said discharged flow, said system further comprising at least two conveying rolls (11a, 11b) that are disposed behind the downstream end of the conveyor (9) in an upstream part (Za) of the cleaning zone in order to be fed with the flow of harvested crop discharged from the conveyor (9), said conveying rolls being arranged to convey said crop flow and to discharge it into a downstream part (Zb) of the cleaning zone (Z), wherein passages (P) are formed between or through said rolls, said passages being arranged to allow an upward air flow (A) therethrough for extracting residues (L) from the crop present on the conveying rolls (11a, 11b).