GRAIN-CLEANER Russian patent published in 2013 - IPC A01F12/44 B07B1/22 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machinery industry and can be used in devices for post-harvest grain treatment. The grain-cleaner comprises a frame, a feeding device, a cylindrical sieve, a casing and a drive. Inside the cylindrical sieve a distributor rotor is rotatably located. The cylindrical sieve is mounted with the ability to rotate and change its axis angle of slope to the horizon. The distributor rotor is made in the form of a screw with continuous or tape spiral and is mounted with the ability to change its angle of slope to the horizon. The external diameter of the spiral, the pitch of the spiral turns and spiral tape width of the distribution screw on its various parts are made different. The spiral turns of the distribution screw are provided with one or more sets, and the number of the sets of the spiral turns at different sections of the distribution screw can also be different.

EFFECT: implementation of the distributor rotor in the form of a screw with a continuous or tape spiral eliminates its clogging with straw particles contained in grain, simplifies the construction of the grain-cleaner and improves its reliability.

2 cl, 2 dwg