| 摘要 |
A combine having grain cleaning sieves and a grain trough therebelow. A cross-flow fan is provided to blow air across the sieves and the fan includes an elongated hollow rotor having forwardly curved peripherally disposed spaced apart blades. A vortex regulator vane having an air foil cross-section is provided on one side between the inlet and the outlet opening and a housing wall is on the opposite side of the rotor. The leading edge of the air foil is closely adjacent the rotor in a radial plane through the longitudinal axis of the rotor. The housing wall extends partially around the rotor and is spaced progressively farther away from the inlet opening to the outlet opening. Vertically and horizontally disposed screens cover the inlet opening and are secured to the housing by springs to permit movement thereof and thereby maintaining them free of foreign material.
|
