LOOSE MATERIAL SEPARATING MACHINE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; separators for loose materials. SUBSTANCE: machine is made in form of at least three multisection drums installed coaxially with clearance. Outer drum is made conical, middle and inner drums are made cylindrical. Multistart screw surface of each drum is made of separate flat members. Flat members in outer and middle drums are made in form of isosceles and scalene triangles forming on working surface opposite direction screw lines with equal pitch and equal number of starts. Flat members in inner drum are made in form of scalene triangles with screw line pitch on its surface from loading to unloading exceeding pitch in opposite direction, and number of starts of different direction screw lines being different. EFFECT: enhanced quality of separation and increased size of sieving area at preservation of overall dimensions of machine. 8 dwg