SEED-CLEANING MACHINE Russian patent published in 1994 - IPC

FIELD: agricultural engineering. SUBSTANCE: machine has drum 1 in the form of sieves mounted between two cheeks 2, 3 along the perimeter of drum 1 through a helical surface. The sieve edges are located along helical lines in the longitudinal section of drum 1. The machine also has rotary drive 8, load device 14 with a cylindrical branch pipe, cylindrical shell 11 fastened to the drum end ahead of load device 14, a helical two-stage guide with larger diameter coils 12. Coils 12 are fastened on the inner surface of shell 11. The guide also has smaller diameter coils 13 located in the cylindrical branch pipe. The diameter of coils 12 is fastened on the shell and their pitch is larger than the corresponding diameter of the coils located in the cylindrical branch pipe and their pitch by a factor of 1.5. EFFECT: improved structure. 7 cl, 16 dwg