PNEUMATIC SEPARATING APPARATUS FOR GRAIN CLEANING MACHINE Russian patent published in 2002 - IPC

FIELD: agricultural production, flour milling, elevator and grain storage and feed mill industry. SUBSTANCE: pneumatic separating apparatus for cleaning grain mixtures by means of air flows has two pneumatic separating systems with settling chambers, pneumatic separating channels and air supplying channels, charging devices arranged inside pneumatic separating channels, cross-flow fan positioned between pneumatic separating systems and equipped with suction window and delivery branch pipe. The latter is joined to first aspiration separating channel and is communicated to additional channel defined between wall adjoining cross-flow fan suction window and wall of pneumatic separating channel, with the latter wall being faced to the former wall. Cross-flow fan suction window is communicated with second aspiration settling chamber via branch pipe whose length and depth are 0.8-0.9 the diameter of cross-flow fan. Adjusting gate is positioned in settling chamber discharge window, at junction point of settling chamber curved wall and first aspiration air discharge channel wall. EFFECT: simplified construction and improved grain cleaning quality. 2 dwg