GRAIN CLEANER FAN Russian patent published in 1994 - IPC

FIELD: agricultural engineering. SUBSTANCE: fan housing has inlet ports and impeller with shaft provided with blades. Fitted square to shaft are round partitions with central holes whose diameters are reduced in direction from inlet ports to middle of impeller. Connected concentrically to partitions are branch pipes. Inner diameter of each branch pipe does not exceed diameter of holes of partition mating with branch pipe. Ring longitudinal channels are formed between branch pipes. Cross sections of channels are of equal size. Non-uniformity of air velocity in fan outlet port is reduced owing to exclusion of harmful effect of field of centrifugal forces on air masses and provision of uniform delivery of air into each longitudinal channel. EFFECT: enhanced quality of grain cleaning due to provision of uniform air stream over width of fan outlet port. 2 cl, 2 dwg