RU145376U1 - CENTRIFUGAL DISK GRINDER - Google Patents

Abstract

The utility model relates to the field of disintegration and processing of rocks and ores in the mining, chemical and other industries. The objective of the invention is to increase the degree of grinding due to the longer exposure to the material of dynamic loads. This problem is achieved in that the centrifugal disk grinder contains a cylindrical body with loading and unloading nozzles, opposite rotating flat upper and lower disks with impact elements. Impact elements are made in the form of a spiral, which are directed in opposite directions on the upper and lower disks.

Description

The utility model relates to the field of disintegration and processing of rocks and ores in mining, chemical and other industries.

A device is known "Centrifugal chopper counter strike" (RU 2150323 C1, 10.06.2000,). The counter impact centrifugal shredder contains a cylindrical body with upper loading and lower discharge openings, a working body on the lower base, a vertically and coaxially mounted additional working body, which is a hollow upper rotor, the inner surface of which is made in a stepped form, on the vertical wall of each stage there are baffle plates and the lower working body is a stepped cone, at each stage of which there are radial ribs. The steps of the lower and upper rotors form a working chamber, while the relative angular speed of rotation is provided between the working bodies, and the baffle plates on the inner surface of the steps of the upper working body are oriented normal to the direction of the pulse message vector to the lower working body.

The disadvantages of this grinder are stepwise grinding, because when the disintegrable rock moves from step to step, finely divided particles are pressed onto the vertical walls of the grinder, which leads to a decrease in the grinder performance, as well as a fixed stepwise increase in the radial speed, which does not ensure its continuous increase, which is necessary for the most complete disintegration of the crushed rock.

A device is known that is closest in the set of essential features, "Centrifugal chopper" (No. 2198028 B02C 13/20, 2003). The centrifugal shredder contains a cylindrical body with upper loading and lower discharge openings, the upper working bodies and the lower working bodies included in it, the lower working body being made in the form of a flat disk with a small recess in the center with radial accelerating plates, on which working surfaces are fixed annular reflective elements forming concentric rings, between which acceleration-fender ribs are installed, and the upper working body is also made in a flat disk with a ring-shaped reflective protrusion of small height with vertical baffles, and the inner working surface of the upper working body is equipped with similar removable annular reflective elements and booster-fins, while the ring elements of the upper working body are located in the middle between the rings of the lower working body.

The disadvantages of this design are the low crushing efficiency, which was originally incorporated into the crusher design, providing only one-act dynamic material contacts between two crushing disks, as well as increased abrasive wear of reflective elements, therefore the crusher is mainly used for crushing and grinding brittle materials with a low abrasive content materials.

The objective of the invention is to increase the degree of grinding due to the longer exposure to the material of dynamic loads.

This problem is achieved in that the centrifugal disk grinder contains a cylindrical body with loading and unloading nozzles, opposite rotating flat upper and lower disks with impact elements. Impact elements are made in the form of a spiral, which are directed in opposite directions on the upper and lower disks.

A utility model is illustrated in the drawing, where in FIG. 1 shows a general view of a centrifugal disk grinder; FIG. 2 is a section Α-A in FIG. 1, in FIG. 3 is a section BB in FIG. one.

Centrifugal disk grinder consists of a housing 1 with loading 2 and discharge 3 nozzles. In the housing on the upper shaft 4, the upper disk 5 is placed and on the lower shaft 6 the lower disk 7. On the working surface of the upper 5 and lower 7 disks are shock elements 8, 9 (respectively) made in the form of a spiral, directed in opposite directions. On the upper shaft 4 and lower shaft 6, pulleys 10, 11 (respectively) of a V-belt drive are installed.

Centrifugal disk grinder operates as follows. When you turn on the drive (not shown) through the V-belt transmission, the torque is transmitted to the upper 5 and lower 7 discs. Discs begin to rotate in different directions. The crushed material, for example marble chips, is fed through the upper pipe 2 to the lower disk 7. Under the influence of shock reflective elements 8, 9 located on spiral paths. Moreover, in connection with the opposite direction of the spirals, forces are created acting on the particle directed in different directions. On the upper from the periphery to the center, on the lower from the center to the periphery. As a result of this, discontinuous and abrasive forces act on the particle of the crushed material. The presence of tensile forces significantly increases the grinding efficiency. With a decrease in particle size, they under the action of centrifugal force and air flow force leave the working area and enter the inner surface of the grinder body 1. As a result of friction, they are deposited and removed from the pipe 3 of the disk grinder.

Claims (1)

A centrifugal disk shredder comprising a cylindrical body with loading and unloading nozzles, oppositely rotating flat upper and lower disks with impact elements, characterized in that the impact elements are made in the form of a spiral, which are directed in opposite directions on the upper and lower disks.