CENTRIFUGAL DISC 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 centrifugal disc grinder contains a cylindrical body 1 with loading 2 and unloading 3 branch pipes, counter-rotating upper 4 and lower 5 discs. Upper 4 and lower 5 discs have a conical working surface. In the center of the upper surface of the lower disc 5, a vertical ring 6 is rigidly fixed with a height exceeding D_max, where D_max is the maximum particle size of the starting material, and with a diameter equal to the diameter of the loading pipe 2. In the vertical ring 6, rectangular cutouts 7 are made along the height, with a width exceeding D_max, to the rear side edge 8 of which, in the direction of rotation of the lower disc 5, vertical curvilinear blades 9 of rectangular cross section are rigidly fixed, ledges 10 with a width exceeding D_max adjoin the working surface, and height, uniformly increasing from the upper working surface of the lower disc 5 to the height of the vertical curved blades 9 on the periphery with the angle of inclination β of the upper surface to the horizon, exceeding the angle α of the natural repose of the material. Vertical curved blades 11 are rigidly fixed to the lower working surface of the upper disc 4 from the opening of the loading pipe 2 to the periphery in the direction of its rotation. (1.5 ... 2) D_max to (0.1 ... 0.5) D_max, in proportion to which the minimum vertical gap between the vertical curved blades 9 of the lower disc 5 and the vertical curved blades 11 of the upper disc decreases uniformly from the center of discs 4 and 5 to the periphery four.

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

1 cl, 3 dwg