DEVICE FOR CLEANING SEEDS FROM RUBBISH Russian patent published in 2015 - IPC B07B1/22 

FIELD: agriculture.

SUBSTANCE: device for cleaning seeds from the rubbish comprises a drum, a loading and an unloading devices, a rotary drive. The drum is made conical and perforated along the perimeter in the form of a multi-thread helical surface with helical grooves inside the drum in the form of pockets of curved shape, with the centres of curvature of the pockets of the curved helical surface, located inside the cross section of the drum, and is formed on the perimeter of three or more perforated strips of trapezoidal form twisted in the longitudinal direction relative to the longitudinal axis and bent in a helical line in the transverse direction on the mandrel in the form of a paraboloid of rotation with increase in their size in width, forming on the perimeter of the drum of three or more inner convex curved surfaces with centres of curvature inside the drum and formation of lapping inside the drum in the form of helical blades along the entire length of the drum from the inlet opening to the outlet opening. Along the entire length of the drum a helical surface of conical shape is mounted with a rectangular cross-section of turns, which is equipped with a device for changing the pitch by its stretching or compressing. The pitch length should be at least one full pitch of the helical surface of the drum.

EFFECT: increase in intensity of separation, the expansion of technological capabilities.

10 dwg