Fan for rotary cleaning mechanism in combine harvesters

Details Fan for rotary cleaning mechanism in combine harvesters Fan for rotary cleaning mechanism in combine harvesters

1982-08-17

1984-08-14

Mancene, Gene

130DIG5, 56 133, A01F 1248

Patent

active

044650817

ABSTRACT:
A rotary cleaning mechanism for cleaning threshed grain in a combine harvester is disclosed wherein a fan is mounted forwardly of the cleaning cylinder to blow air through the cleaning sieves to make unwanted residue airborne for discharge from the cleaning cylinder. A fan housing is provided with a first passageway to direct a flow of air through the grain being conveyed from a centrally located infeed mechanism onto a radially outwardly spaced grain pan. A second passageway is also provided in the fan housing to direct a flow of air through threshed grain being conveyed rearwardly off the grain pan onto a radially outwardly located cleaning sieve. The fan is mounted on an axis of rotation common with the cleaning cylinder and forwardly of the infeed housing, which includes an eliptically shaped infeed chute to aerodynamically permit the flow of air therearound to clean threshed grain on the cleaning cylinder immediately adjacent thereto. Deflector plates are provided within the second passageway to distribute the flow of air along the axial length of the cleaning cylinder, with a more concentrated flow of air being directed at the forward end thereof.

REFERENCES:
patent: 323726 (1885-08-01), Payne
patent: 1306239 (1919-06-01), White
patent: 4198802 (1980-03-01), Hengen et al.
patent: 4284086 (1981-08-01), Williams

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