TWO-STAGE MATERIAL GRINDER Russian patent published in 2016 - IPC B02C13/14 

FIELD: machine building.

SUBSTANCE: grinder contains a frame, top and additional casings, a loading branch pipe, a top shaft, a bearing casing, bearing assemblies, top and additional rotor cups with partitions, a motor, a V-belt transmission, pulleys, a flexible connecting channel. The bearing casing is connected with an adjacent, intermediate casing and a retainer. Inside the adjacent casing a spout is installed. The additional shaft is connected with the bottom end of the motor shaft using the V-belt transmission, wherein the side surfaces of the top and additional rotor cups are made parabolic, and grates in the bottom part of the additional casing have an ellipse shape.

EFFECT: possibility of speed modes adjustment, reduced volume of stagnation areas, thus increasing grinder capacity, and reducing power consumption during its operation.

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