LIPPED SCREEN OF CLEANING SYSTEM OF GRAIN COMBINE HARVESTER Russian patent published in 2017 - IPC A01F12/44 A01D41/12 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machinery industry. The lipped screen comprises rotary plates located in the frame in parallel, located on the sides from the rotation axis and having upper and lower working surfaces. The upper working surface is made along the longitudinal edge with a flat comb which lobes have the shape of plane segments. Between the comb lobes the bent teeth are formed, directed from the comb plane downwards and towards the lower working surface which is formed with through slots opposite the said teeth and is bent downwards. The bent teeth have a streamlined cross-sectional shape. The rotary plates have the circular openings between the slots in the lower part of the working surface. The diameter of the openings in the successively mounted rotary plates is made successively increasing to a maximum to the last rotary plate proportional to airflow damping. The plates are mounted in the frame one after the other at a distance that ensures the possibility of passing of the bent teeth of one plate to the corresponding slots of the adjacent plate.

EFFECT: structure of the lipped screen, eliminating whirl of air flows around the comb and increasing the screen performance and, accordingly, the combine.

5 dwg