UA123060C2 - SMALL HAMMER CRUSHER OF COMBINED ACTION - Google Patents

Abstract

The invention relates to the field of mechanical engineering and relates to hammer crushers that can be used for grinding dry grain materials. The small-sized hammer crusher of the combined action contains the case with loading and unloading mouths and a sieve, the working chamber with a rotor on which hammers are hinged. On the inner surface of the housing are fixed plates in the form of a ring sector. According to the invention, the hammers are made with a variable thickness, which increases in two planes: in the radial direction - from the center to the inner surface of the housing, and in the tangential - opposite to the direction of rotation of the hammer. The hammers are arranged so that the gap between the hammer and the plate decreases in the specified radial and tangential directions. The technical result of the invention: increasing the efficiency of the crusher of combined action by intensifying the grinding of the processed material.

Description

The invention belongs to the field of mechanical engineering and concerns hammer crushers that can be used for grinding dry grain materials.

There is a well-known small-sized hammer crusher of combined action (Patent of Ukraine for a utility model Mo 121453, MPK VO02С 13/04; publ. 11.12.2017, Bull. Mo 23), which contains a body with a loading and unloading neck and a sieve. Inside the housing is a working chamber with a rotor on which the hammers are hinged. Fixed plates in the form of a sector of a ring are installed on the inner surface of the case.

The disadvantage of such a small-sized hammer crusher of combined action is the low efficiency of work, the significant duration of the grinding process to the specified degree of grinding, and the technological complexity of manufacturing a plate with variable thickness.

The invention is based on the task of increasing the efficiency of the small combined action crusher by changing the shape of the hammers.

The task is solved by the fact that in a small-sized hammer crusher of combined action, which contains a housing with loading and unloading ports and a sieve, a working chamber with a rotor is placed inside the housing, on which the hammers are hinged, fixed plates in the form of a sector of a ring are installed on the inner surface of the housing, according to the invention, the hammers are made with a variable thickness that increases in two planes: in the radial direction - from the center to the inner surface of the case, and in the tangential direction - opposite to the direction of rotation of the hammer, and the hammers are located so that the gap between the hammer and the plate decreases in the indicated radial and tangential directions.

Installation of hammers with variable thickness ensures reduction of the gap between the hammer and the plate in two planes: in the radial direction - from the center to the inner surface of the case, and in the tangential direction - opposite to the direction of rotation of the hammer. This contributes to the intensification of the crushing process due to better grinding of the material to be crushed, which has fallen into the space between the hammer and the plate, which, in turn, increases the efficiency of the small-sized hammer crusher of combined action. The shape of the hammers will depend on the properties of the crushed material, and in particular the dependence of the load on the deformation of the crushed material.

From Fig. 1 schematically shows a small hammer crusher of combined action, on

Fig. 2 shows a diagram of the interaction of a particle of crushed material with the side surfaces of a hammer with variable thickness in two planes and a fixed plate in a vertical section, and in Fig. C - the diagram of the interaction of a particle of crushed material with the side surfaces of a hammer with variable thickness in two planes and a fixed plate in a horizontal section.

A small hammer crusher of combined action contains, as shown in fig. 1: loading 1 and unloading 2 nozzles, body C with a corrugated inner surface 4. Inside the body C is a working chamber 5 with a rotor. The rotor consists of a shaft 6, on which discs 7 are placed, on which hammers 9 are hinged with the help of axes 8.

In the lower part of the housing Z, there is a sieve 10. On the inner surface of the housing, a set of plates 11, located at the same distance between two adjacent hammers 9, is immovably fixed.

Other elements (drive, devices for controlling and regulating the supply of raw materials to the working chamber, etc.) are made in accordance with known solutions and are not marked on the drawing.

The crusher works like this.

The grain material enters the working chamber 5 through the loading neck 1. During the movement of the shaft, the disks 7 with hammers 9, which are hinged on the axes 8, rotate.

As a result of the impact of the hammer 9, the grain 12 is partially destroyed and thrown to the inner grooved surface 4 of the body 3, from the impact of which the destruction of the crushed material continues. In addition, the grain is destroyed, hitting the end of the plate 11.

In addition, the grinding process of the crushed material takes place. Due to the action of the centrifugal force, the crushed material 12 (Fig. 2) moves in the radial direction, from the center to the inner surface of the housing 3, and is pinched in the gap between the hammer 9 and the plate 11, which is reduced. The pinched material 12 is destroyed due to the reduction of the gap between the hammer 9 and the plate 11 during the movement of the hammer 9 relative to the plate 11 in the tangential direction of Fig. 3.

Grinding products are sifted through a sieve 10 and removed from the machine through the discharge nozzle 2.

This invention contributes to the intensification of grinding of processed material. (510)

Claims (1)

FORMULA OF THE INVENTION A small-sized hammer crusher of combined action, containing a body with loading and unloading ports and a sieve, inside the body there is a working chamber with a rotor on which the hammers are hinged, on the inner surface of the body there are fixed plates in the shape of a sector of a ring, which is distinguished by the fact that hammers are made with a variable thickness that increases in two planes: in the radial direction - from the center to the inner surface of the case, and in the tangential direction - opposite to the direction of rotation of the hammer, and the hammers are located so that the gap between the hammer and the plate decreases in the indicated radial and tangential directions directions -y is / y I y XX ku, y pleso u a 4 r y ka i -e 5. i y i y yo be 2 reeninnnny Be NE se se sk sk, zh ih Z yy I Х y y y y y y y s and х I dec g sei as KU and z ze. Shi oh m t (ut ssh s Ne x / I as I 1 I th and x with so Fig. 1