CENTRIFUGAL DISC CHOPPER Russian patent published in 2021 - IPC B02C13/22 

FIELD: grinding.

SUBSTANCE: invention relates to a device for grinding and can be used, in particular, in the production of building materials. The grinder contains a cylindrical body 1 with a loading 2 and 3 unloading nozzles, oppositely rotating upper 4 and lower 5 discs. The upper horizontal disc 4 is made stepped. Radial ribs 7 and 8 are rigidly fixed on the lower surface of the upper horizontal disc 4 and on the upper surface of the lower horizontal disc 5. Concentric grooves 11 of a semicircular cross-section are made on the lower surface of the upper horizontal disc 4 at the periphery of each stage 9 and 10, on the inner side surfaces of which are rigidly fixed with the same pitch exceeding D_max, flat vertical ribs 12 located radially, where D_max is the maximum particle size of the material to be crushed, in the lower part of each of which a rectangular cutout 13 is made. In the center of the lower horizontal disc 5, a spreader 14 with radial blades 15 is rigidly fixed, each of which adjoins the end surface of the radial ribs 8. The vertical clearance between the radial ribs 7 and 8 of the upper 4 and lower 5 horizontal discs decreases at each subsequent stage 9 and 10 from center to the periphery of horizontal discs 4 and 5 from D_max to (0.1 ... 0.5) D_max. On the upper surface of the lower horizontal disc 5 rigidly fixed along concentric circles with the same pitch exceeding D_max, vertical bars 16 of rectangular cross-section, which can be located with a technological gap in rectangular cutouts 13 flat vertical ribs 12. Height and width of concentric grooves 11 and vertical bars 16 decrease from the center to the periphery of the horizontal discs 4 and 5 in accordance with the decrease in the vertical clearance between the radial ribs 7 and 8, the number of which increases on both horizontal discs 4 and 5 from their center to the periphery.

EFFECT: shredder improves the efficiency of the work process.

1 cl, 3 dwg