CENTRIFUGAL DISK GRINDER Russian patent published in 2022 - IPC B02C7/00 B02C13/20 

FIELD: materials grinding.

SUBSTANCE: invention relates to devices for grinding various materials and can be used in the production of building materials, as well as in other industries. The chopper contains a cylindrical body 1 with loading 2 and unloading 3 branch pipes, oppositely rotating upper 4 and lower 5 disks. The upper 4 and lower 5 disks have a stepped conical working surface with an inclination angle α of the generatrix to the horizon, exceeding the angle β of the natural repose of the material. The conical working surface of each of the disks 4 and 5 consists of conical rings 6, 7, 8 and 9, 10, 11, rigidly and sequentially fixed to each other with a shift from top to bottom along the vertical of each subsequent ring from the center of the disks 4 and 5 to their periphery, with rigidly fixed radial ribs 12 and 13, respectively, of rectangular cross section. The vertical gap between the lower working surface of the upper disk 4 and the upper working surface of the lower disk 5 decreases from the center to the periphery from (1.5...2)D_max opposite the inner conical ring to (0.2...0.5 D_max opposite the outer conical ring, where D_max is the maximum particle size of the starting material. On the periphery of the upper working surface of the conical rings 9 and 10 of the lower disk 5, radial grooves 14 of a semicircular cross section are made along the circumference, with a length l exceeding D_max. The surface of each cavity 15 in the radial groove 14 coincides with the upper working surface of the subsequent conical ring of the lower disk 5. The vertical gap from the cavity 15 in each groove 14 of the previous conical ring to the lower edge 16 of the end face of the subsequent conical ring of the upper disk 4 and the diameter of the radial grooves decrease from the center to the periphery in proportion to the decrease in the vertical gap between the working surfaces of the conical rings.

EFFECT: grinder provides an increase in the efficiency of the grinding process and productivity of the finished product.

1 cl, 4 dwg