SU844049A1 - Apparatus for disintegrating materials - Google Patents

Description

one

The invention relates to a device for grinding materials and can be applied in the construction, mining and other industries.

Closest to the invention is a device for grinding materials, including a housing with working bodies in the form of augers mounted with the possibility of turning, facing each other, on the frontal surface of which knives 1 are fixed.

The disadvantage of the device is the low efficiency of the grinding process.

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

This goal is achieved by the fact that a device for grinding materials, including a housing with working bodies in the form of augers mounted for rotation towards each other, on the frontal surface of which knives are fixed, is provided with a disc knife located between the screws with a possibility of deflection and parabolic ribs extending from the center in the radial direction, with the fins set in 90-120 ° increments on the frontal surface of each turn of the screws.

FIG. 1 shows a general view of a device for grinding materials; on

FIG. 2 - section A-A of FIG. one; in fig. 3 - section bb FIG. one.

A device for grinding materials comprises a housing 1 inside which a shaft 2 is located with working bodies in the form of screws 3 rotating towards each other with turns of the right 4 and left 5 windings. On a frontal surface of each turn of screws with a step of 90-120 ° are established

ribs 6, of parabolic shape, extending from the center in the radial direction. The final turns of the screws are made in the form of incomplete discs 7, limiting the final grinding chamber 8, on the frontal surface of which the knives 9 are fixed.

Between the screws 3 and the ribs 9 there is a disk knife 10 with the possibility of deflection, either rigidly fastened to the shaft 2, or fixedly fixed relative to the body of the device.

The shaft 2 is fixed in angular contact bearings 11 protected by gland seals 12. In the middle part there is a shaft

2 has longitudinal ribs 13.

The housing 1 has feed hoppers 14. The ribs 15 are located along the forming inner walls of the housing, and on the outer walls there are ring washers 16 having

the possibility of axial movement, with wedge cones 17, protecting the springs 18 from contamination, as well as ring washers 19 with mounting bolts 0 compressing the springs 18 by means of washers 19. The washers 16 have holes for studs 21, which are between the washers 16 and the knife 10 flat washers 22 are supplied, the thickness of which determines the width of the discharge ring gap 23.

The discharged material is discharged to receiver 24.

The receiver 24 and the housing 1 are mounted on the frame 25.

A device for grinding materials operates as follows.

The crushed material through the funnels 14 enters the housing 1 and through the working bodies in the form of screws 3 is fed into the grinding chamber 8. The material is caught by the ribs 6 of the screw turns and is rotated relative to the axis of the shaft 2. The ribs 15 prevent the material from rotating with the screw , contribute to the linear movement of the material along the path of the screw.

At the same time, the presence of parabolic ribs 6 on the frontal surface of the augment of screws with a step of 90-120 ° ensures the movement of material layers in the radial direction.

These two mutually perpendicular movements create conditions under which intensive mutual abrasion of particles of material occurs in the entire inter-turn volume of the speck, which is the chamber of the initial grinding. As the material progresses forward along the augers, the material becomes smaller and smaller, while at the same time, under the action of the working turns of the screws, the material becomes more compacted, which contributes to its further sodder grinding. This process is completed in the grinding chamber 8, especially when exiting through the unloading gap 23, where the pressure reaches a maximum.

At the same time, the width of the discharge ring gap and the maximum possible crystal size of the chain component contained in the starting material, which eliminates the possibility of mechanical damage during unloading. This allows the grinding of material throughout the working volume of the mill and increases the

efficiency with decreasing grain size.

During the experiments, it was found that the device has the longest service life when the ribs are made expanding from the center in the radial direction, and the final grinding chamber is placed in the middle of the body.

Thanks to this technical solution, it is almost completely eliminated.

axial loading on bearings 11 due to the fact that the material shifts the left side of the shaft to the left and the right side to the right with the same force, which increases the durability of the bearings and reduces energy consumption.

The presence of the knife 10 located between the screws with the possibility of deflection, combines the forces created by the pressure of the material from the two sides of the mill and increases the specific productivity.

The invention allows the grinding of a material containing a valuable component with increased efficiency.

Claims (1)

Invention Formula A device for grinding materials, including a housing with working bodies in the form of screws mounted with the possibility of turning towards each other, whose frontal surface is fixed, characterized in that, in order to increase the efficiency of the grinding process, the device is equipped with a circular knife positioned between the screws deviations, and parabolic ribs, extending from the center in the radial direction, with the ribs set in 90-120 ° increments on the front surface of each turn spekeov. Sources of information, attributed to the examination during the examination 1. USSR Copyright Certificate No. 606616, cl. B 02C 18/36, 1976. L / 25 //, 4U Figure 1 Gh ..% 2 20 A-A (eng. 2 FIG.