COMBINE HARVESTER CLEANING FAN Russian patent published in 2023 - IPC A01F12/48 

FIELD: agricultural engineering.

SUBSTANCE: system for cleaning a grain harvester. The cleaning fan of a combine harvester contains a casing, an impeller, a shaft driven by a counter-drive of the fan through a variator pulley, and a rotation speed sensor. The shaft has splines in its middle part. The fender consists of the central, the right, and the left sections. The central section of the impeller, mounted on a splined bushing mounted on the shaft splines and two support bushings located on the shaft is driven by the counter-drive of the fan using a V-belt drive via a variator pulley. On the right side of the shaft, the right drive shaft with the right wing section mounted on it is mounted on bearings, driven into rotation from the counter-drive of the fan using a V-belt drive via an additional variator pulley installed on the right side of the fan. On the left side of the fan, a left drive shaft with a left wing section mounted on it is mounted on bearings, driven into rotation by means of a gearbox consisting of two pulleys, the first of which is installed at the left end of the shaft, and the second - on an axis mounted on the frame of the thresher, the variator and V-belts. Fixation of the rotation speed of the central section of the fender, controlled by the variator, is ensured by a rotation speed sensor, and the rotation speeds of the right and left sections of the fender, regulated by additionally installed variators, are ensured by two additionally installed sensors.

EFFECT: ability to regulate pressure and direction of air flow along the cleaning width of a grain harvester.

1 cl, 3 dwg