SU1080856A1 - Mincer - Google Patents

Abstract

1. A Crusher, comprising a housing and a rotor marked in it with grinding bodies in the form of rollers, the cross section of which has the shape of a polygon with convex sides, characterized in that, in order to increase the efficiency of the grinding process of viscous and fibrous materials, the convex sides of the cross section The rollers have different radii of curvature. 2. Grinder according to claim 1, characterized in that the radii of curvature of the sides of the mugagon of the cross section of the rollers are equal to or smaller than the radius of the inner surface of the body and equal or more described by the circumference of the polygon. at

Description

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The invention relates to the technique of grinding various materials and can be used, for example, in asbestos industry for grinding ores. ,

A grinder is known, comprising a housing, a rotor with a vertical axis of rotation with cylindrical sleeves on eccentric bearing journals and freely mounted grinding rings with the possibility of rolling the inner surface of the housing 1,

The disadvantage of a shredder is in limiting the efficiency of shredding, due to the fact that in each

the grinding stage on the rotor axis there is only one contact grinding line. In addition, when worn grinding rings difficult to replace them, since it is necessary to disassemble the rotor.

A grinder is known, comprising a housing and a rotor with grinding bodies in the form of disk rollers mounted on supporting elements. In this grinding design, the number of contact zones of the processed product with grinding bodies is increased compared to the previous 2.

The disadvantage of a shredder is that with an increase in the number of crushing bodies (disk rollers) in each row, their radius decreases. The gripping condition of pieces of a product of a given size deteriorates as the gripping angle formed by two tangents drawn to the crushing surfaces at the points of contact with the crushable piece increases. When the angle exceeds the longitudinal angle of capture - the main technological characteristic of grinding {/ -33 °), product slip will prevail, which will reduce the efficiency of grinding and increase the wear of the grinding bodies.

The closest to the invention to the technical essence is a grinder, comprising a housing and a rotor placed therein with grinding bodies in the form of rollers, the cross section of which has the shape of a polygon with convex sides, thereby providing a small angle of capture of the material being crushed and, as a result, an increase in efficiency grinding process and reducing wear 3.

However, when grinding viscous and fibrous materials, such as asbestos-containing materials, a compacted layer of material is formed on the surface of the body, and as a result, the grinding efficiency drops sharply.

The purpose of the invention is to increase the efficiency of the grinding process in fiber and fibrous materials.

The goal is achieved by those that in a grinder, containing a body and a rotor placed in it with grinding bodies in the form of rollers, the cross section of which has the shape of a polygon with convex sides, the latter have different radii of curvature.

At the same time, the radii of curvature of the sides of the polygon of the cross section of the rollers can be equal to or less than the radius of the inner surface of the body and equal to or greater than the circumscribed circle of the polygon.

FIG. 1 shows the proposed chopper, vertical section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - part of the body with a roller

The grinder includes a housing 1 with loading 2 and 3 discharge funnels and a rotor 4 containing a vertical shaft 5 mounted in bearing assemblies b, having disks 7 on the periphery of which, using fingers 8, are installed grinding body 9 in the form of disk rollers with the possibility of running around the inner surface of the housing one.

The grinding body (roller 9) has an external rolling surface with a variable radius due to the fact that the cross section of the roller has the shape of a polygon with convex sides with different radii of curvature P, p.

The value satisfies the following inequality

 .KOP.R;

where RX, is the radius of the inner surface of the housing 1 rolled around by the roller;

RJ is the radius of curvature of one of the sides of the roller cross-section polygon; Rjjpp is the radius of the circumscribed circumference of the roller cross section polygon. At the same time g g ,,.

The grinder works as follows.

The initial product is fed through the feed funnel 2 into the housing 1 and further to the disks 7 of the rotor 4 where the product is scattered on the inner surface of the housing 1 due to the rotation of the latter, and due to its own gravity goes down where it is caught by crushing bodies 9 and crushed by them. Depending on the number of rows of rollers along the rotor height, the product may be subjected to repeated

Claims (2)

. 1. GRINDER, comprising a housing and a rotor placed therein with grinding bodies in the entrance of the rollers, the cross section of which is in the form of a polygon with convex sides, characterized in that, in order to increase the efficiency of the grinding process of viscous and fibrous materials, the convex sides of the polygon of the cross section of the rollers have different radii of curvature. 2. Chopper pop. 1, characterized in that the radii of curvature of the sides of the polygon of the cross section of the rollers are equal to or less than the radius of the inner surface of the casing and equal to or greater than the described Q circle of the polygon. 8