SU1369791A1 - Arrangement for grinding materials - Google Patents

Abstract

The invention relates to a device for grinding materials and improves the efficiency of the grinding process. The device comprises a cylindrical body 1, a grinding body made in the form of a perforated disk 2 mounted on the end of a vertical shaft 3 located eccentrically with respect to the axis of the body 1, knives 4 mounted on a cross 5 and on the top end surface of the disk. The housing in the upper part is closed by a cover 6 with a hole. The grinding of the material takes place between the bottom of the housing and the perforated disk, rotating in the opposite direction. During the course of the grinding body in the lowest position through the holes in the perforated disk material is pushed through. Due to centrifugal forces, the extruded material is scattered on the walls, then it is cut by means of knives 4 and again under the action of gravity to the bottom of the body. 1 hp f-ly, 3 ill. C b (L

Description

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The invention relates to a device for grinding materials and can be used in construction, chemical, food and other industrial sectors, mainly for making pasty materials of high dispersion and uniformity.

The purpose of the invention is to increase the efficiency of the grinding process.

FIG. 1 shows the described device, a vertical section; in fig. 2 - the same, top view without a lid; in fig. 3 is a section A-A in FIG.

The device consists of a cylindrical body 1, a grinding body made in the form of a perforated disk 2 mounted on the end of a vertical shaft 3, located eccentrically with respect to the axis of the cylindrical body 1, knives 4 mounted on a cross 5 and on the top end surface perforated disk 2. The housing in the upper part is closed with a 6-hole with a hole

Knives A are verti

The plates are located sharpened at an angle of 15-60 and located in a vertical plane at an angle of 15-60 ° to the tangent circle of the perforated disk 2.

The diameter of the perforated disk 2 grinding body (,,) should

to be at least 1/2 of the inner diameter of the cylindrical body (d |) to prevent the formation of a dead zone and not more than 3/4 d to provide a proper gap between the perforated disk and the inner surface of the cylindrical body allowing the material to be ground to freely fall to the bottom of the cylindrical body in the zone of abrasion).

The diameter of the holes of the perforated disk (d lane. Must be

not less than three maximum diameters of the ground particles (, particles

crushed material) to ensure the material is forced through.

The angle of inclination of the knives to the tangential circumference of the grinding body should be within 15 - 60 °, which ensures effective cutting of the adhering comminuted material from the inner side surface of the body, i.e. if the angle of inclination of the knives is less than 15 or greater than 60, then a thin layer of material remains on the lateral surface of the body, the knives do not cut the adhered material, but only slide along the side surface.

. The angle of sharpening of the knives should also be in the range of 15 to 60 and be less than or equal to the angle of inclination of the knives to ensure the normal operation of the device, i.e. for example, if the angle is on the corner of sharpening Otherwise

clone knives 15, then

knives should be 15 °,

if the sharpening angle is less than 15 °,

then the knives are quickly dumb ts; if more

15, then the knives rub on the side over 5

five

hull and when the speed of rotation of the grinding body is more than 800 rpm, shocks occur.

The device works as follows.

The material to be ground is fed through the opening of the removable cover 6 into the cylindrical body 1. The grinding body is in its extreme upper position. Through the gap between the shaft 3 and the cylindrical body 1, the material to be ground falls to the bottom of the body. The grinding of the material occurs between the bottom of the cylindrical body 1

0 and a perforated disc 2 rotating in the opposite direction. During the course of the grinding body to the lowest position (before touching the bottom of the cylindrical body) through the turn in the perforated disk 2, the material being crushed is pushed (additional grinding). Due to the centrifugal forces, the extruded material is scattered on the walls of the housing, then, after cutting the knives 4 of the grinding body, it is cut off and under the action of gravity again falls to the bottom of the housing 1 through the gap between the perforated disk 2 and the cylindrical housing 1. At this moment the grinding body Em move to the highest position.

The counter rotation of the cylindrical body 1 and the grinding body provides material crushing over the entire base area of the cylindrical body 1.

The perforation in the disk 2 prevents the crushed material from sticking between the bottom of the housing 1 and the disk 2, and the reciprocating movement of the grinding body ensures its extrusion, thus bringing about

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The material is intensively crushed by rubbing it between the disks of the bottom of the cylindrical body 1 and the perforated disk 2 and extruding the material through the perforation of the disk 2, and the knives 4 provide additional mixing of the material throughout the volume

The grinding organ can be driven (rotational and reciprocating movement along the axis of rotation) using a 2H118 vertical drilling machine and other types of equipment that provide the two specified forms of movement in an automatic mode. The drive of the cylindrical body 1 can be performed using an electric motor and one of the gears: cylindrical, conical V-belt, etc.

The proposed device makes it possible to grind mixtures of any moisture content (including dry mixtures) and to obtain a homogeneous material. The use of a device for the mechanical activation of phosphogypto cement mixtures allows to increase the strength of manufactured products by 2-2.5 times or, while maintaining the strength characteristics, to reduce the consumption of the live by 0-40%.

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Claims (2)

1. A device for grinding materials, comprising a cylindrical body and a perforated disk located therein mounted on the end of a vertical shaft mounted for rotation and reciprocating movement, characterized in that, in order to increase the efficiency of the grinding process, the perforated disk is fitted with its upper end surface with knives, and the vertical shaft is located eccentric with respect to the axis of the cylindrical body, which is mounted for rotation avstrechu vertical rotation shaft, wherein the blades have an angle of 15-60 ° sharpening and arranged in a vertical plane at an angle to the tangent of the disk equal to 15-60 °. 2. The device according to claim 1, characterized by a & m, that the perforated disk has a diameter equal to 1 / 2-3 / 4 of the diameter of the cylindrical body, and the holes of the perforated disk have a diameter of at least three diameters of the maximum particle size of the material to be ground. FIG. 2 Fig.Z