GRAIN CLEANING MACHINE

agricultural production, elevator and grain storage industry and feed mill industry. SUBSTANCE: grain cleaning machine has pneumatic separating channel, feeder with guiding grid, settling chamber communicated with outlet end of pneumatic separating channel, fan, aspiration channel providing communication between settling chamber via fan with pneumatic separating channel below feeder, device adapted for supplying air under guiding grid and equipped with flow rate regulator formed as pneumatic chamber with window, and product receivers. Fan delivery branch pipe is divided by adjacent surface into two air supplying channels, each communicated via inlet part of main pneumatic separating channel and additional pneumatic separating channel with settling chamber. Feeding device of main and additional pneumatic separating channels has row of parallel perforated inclined surfaces communicating with air supplying channels. Two pivotally secured adjusting gates are arranged at the end of each adjacent surface, in zone where fan delivery branch pipe is divided into two air supplying channels. Also, charging device is communicated via dust discharge channel with outer part of pneumatic separating channel discharge end. EFFECT: simplified construction, increased efficiency and improved quality of grain cleaning. 1 dwg