A combine harvester includes a chassis and a cleaning fan assembly connected to the chassis. The cleaning fan assembly includes a first housing fixedly mounted to the chassis or other point on the combine harvester. A second housing is mounted to the first housing. A hub of the second housing is circumferentially surrounded by a hub of the first housing. A fan motor is fixedly mounted to the second housing. A driveshaft is non-rotatably mounted to the rotatable output shaft of the fan motor. A first bearing is arranged between the second hub and the driveshaft. A second bearing is arranged between the first hub and the second hub. The second bearing is configured to compensate for angular misalignment between the first hub and the second hub.

In one embodiment, a method comprising drawing outdoor air past one or more screens of a combine harvester by generating air flow; circulating the air flow through one or more ducts and into a cleaning system of the combine harvester; closing a baffle in each of the one or more ducts; and responsive to the closing, discharging the air flow past the one or more screens.

A rotating suction wand for a cooler box screen including a hollow body for attaching to a suction hose. A first slot and at least a second slot are formed in the hollow body in fluid communication with an interior of the hollow body for facingly engaging a screen. The construction and arrangement of the slots redistributes suction force along the length of the wand in such a way as to compensate for differences in angular rotational speed of the wand at varying radial distances from the center of the wand as well as to overcome suction force reduction which normally occurs from the center to the ends of the wand. Consequently, debris is more effectively removed from the screen from the central regions of the wand to radially distal regions thereof.

A rotary screen is provided for cleaning an air flow for use by a combine harvester, for example for use by a cooling system. An annular brush is used to provide a seal between a rotating screen member and a static plate. The brush extends generally radially outwardly from a support towards the rotary screen member, which is fitted around the brush so that a radially outer surface of the brush contacts an inner surface of a seal region of the rotary screen member. The seal region tapers radially outwardly towards its axial end and also overlaps the brush. In this way, the brush is protected from damage and also has a long lifetime because it still performs its sealing function even after experiencing wear.

A screening device and a self-propelled harvester with a screening device. The screening device includes at least one suction nozzle that has an elongated hollow body with at least one suction opening which extends sectionally in the longitudinal direction and transverse direction of the hollow body, and is connected by at least one air duct in the interior of the hollow body to a connection arranged in the hollow body for connecting to a vacuum source. The suction opening is positioned facing a screen of the screening device. The air duct has a cross-sectional shape that increases in the vertical direction toward the connection starting from an outer end of the suction nozzle. An inner contour facing the suction opening of the air duct has a contour that substantially corresponds to an airfoil.

An airflow directional control system in an agricultural harvester having a grain tank or other structure, an internal combustion engine and a cooling system cooler box disposed between the grain tank or other structure and the internal combustion engine includes a cooler box cover over the cooler box between the grain tank or other structure and the internal combustion engine, at least one air director between the cooling box and the internal combustion engine and a panel adjustment system controlling tilt of side panels of the harvester.

A combine harvester for seed production and multiplication of grains with automatic cleaning function includes a machine body. The machine body includes a header for harvesting grain plants, and a cleaning device mounted on the header for cleaning the header. The cleaning device includes a controller connected to both a blowing mechanism and a material collecting box mechanism via signals. The blowing mechanism is employed to allow for automatic cleaning of the header without the need to shut down the machine; and seeds and other residues blown out during the cleaning can be recovered through the material collecting box mechanism, avoiding waste.

A combine harvester includes a feederhouse mounted to a chassis adapted at a front end to support a crop gathering header, a duct mounted on the feederhouse that is connected to a crop conveying passage of the feederhouse via a set of suction openings, a set of vent openings in the duct, each of the vent openings having a respective closure element movable between an open position and a closed position, and a fan arranged within the duct that can be operated in a first direction to create a suction airflow to extract dust from the crop conveying passage and discharge the dust through the duct, and in a second direction to create a blowing airflow to open the closure elements and vent air through the vent openings.

A feederhouse of a combine harvester has a dust ejection system for sucking dust from within an outer housing of the feederhouse, in particular from a flow in the opposite direction to the main material flow. An opening in an outer wall communicates with an outlet of the dust ejection system. An upstream end of the opening is connected to a convex guide surface which extends in the downstream direction and curves towards the outlet. This improves the efficiency of the ejection system.