RU2572311C1 - Grinder - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: claimed grinder comprises the frame bearing bed, drum with loading holes to house blades, prop with motor, V-belt drive, rotor bowl with radial ribs, thrust ring and bearings. Note here that said grinder comprises an extra shaft with drive gear engaged with the motor shat lower extension while drive gear is engaged with rotor bowl drive driven gear.

EFFECT: higher grinder efficiency.

3 dwg

Description

The invention relates to crushing, processing, construction and equipment for the production of materials used in the construction materials industry, in the mining, chemical and metallurgical industries, and can find application in road construction, utilities, as well as in the processing of waste from various industrial activities.

A known design of a dynamic self-grinding mill in which the process of unloading ground material is improved (SU 1516139 A2, publ. 10.23.1989).

The disadvantage of the mill is its relatively complex design and high specific energy consumption.

Closest to the proposed invention, adopted as a prototype, is a "Dynamic self-grinding chopper", patent for the invention of the Russian Federation No. 2465960 C2, publ. 11/10/2012, Bull. No. 31.

The disadvantage of the grinder dynamic self-grinding is the relatively low productivity due to poor circulation of the material in the cavity of the drum.

The objective of the invention is to increase the performance of the grinding device by intensifying the interaction of particles during their circulation in the cavity of the drum.

The problem is solved as follows.

A material shredder containing a frame, a support plate, a drum with loading holes in its upper part, in which a support shaft, an electric motor with two output shaft ends, an electric motor stand, a V-belt drive, a rotor bowl with radial ribs, a support ring and bearing assemblies are distinguished the fact that the additional shaft on which the drive gear is mounted is connected to the lower end of the motor shaft and secured to it with a wedge connection, while the drive gear is engaged SRI with the driven gear wheel drive of the rotor cup and the interior cavity of the drum are installed blade.

The proposed device is illustrated by drawings, which depict the material chopper (Fig. 1, 2 and 3).

The material shredder contains a frame 1 attached in the upper part to a removable cross member 19, which provides structural rigidity (Fig. 1, 2). A base plate 2 is attached to the bottom of the frame 1 by means of bolted connections. A motor stand 3 and a support shaft 12 are mounted on the base plate 2.

The motor stand 3 with the lower end is rigidly mounted in the support plate 2. The upper end of the support shaft 12 is connected to the removable cross member 19 by means of bolt connections 18 and 27, and the lower end of the support shaft 12 is rigidly attached to the support plate 2.

An electric motor 4 with two output ends of its shaft — the upper 5 and the lower 6 — is mounted on the rack of the electric motor 3 using bolted joints. At the upper end of the shaft 5, the drive pulley 7 of the V-belt drive is mounted using a keyed connection, and an additional shaft 9 is installed on its lower part 6 The additional shaft 9 is coupled to the lower end of the shaft 6 of the motor 4 along the conical surface 29 and is fixed therein by means of a wedge 28 (Fig. 3). On the additional shaft 9, with the help of a keyed connection, the drive gear 10 of the rotor bowl drive 14 is mounted.

The pinion gear 10 of the rotor bowl drive 14 is engaged with the driven gear 27.

A rotor bowl 14 is mounted on the support shaft 12 with the help of the lower bearing assembly 13. A driven pulley 20 is connected to the drum 16 using bolted connections 30, which is mounted on the support shaft 12 with the help of the upper bearing assembly 17.

Kinematic transmission from the electric motor 4 to the drum 16 can be V-belt, as in this example, as well as chain or screw.

Performing kinematic transfers of the drive from the electric motor 4 to the drum 16 and the rotor bowl 14 with the help of a V-belt and gear transmission, when the electric motor 4 is turned on, the drum 16 and the rotor bowl 14 rotate in opposite directions.

On the driven pulley 20 of the drive of the drum 16 evenly made four loading holes 22, which serve to load the source material. On the outer surface of the rotor bowl 14 using a spline connection mounted driven gear 27 of the drive rotor bowl 14.

The rotor bowl 14 is evenly divided into six sectors using ribs 15.

In the inner cavity of the drum 16 are evenly mounted and rigidly fixed, for example, by means of electric welding of the blade 21.

A support ring 23 is attached to the lower part of the drum 16 by screw connections, which serves to prevent the material from escaping from the material shredder.

In the lower part of the drum 16, exhaust openings 26 are made, which serve to discharge the material particles from the drum 16 which have reached the required degree of grinding and which, after leaving the drum 16, are accumulated in the receiving tank 24.

To unload the finished product that has fallen into the receiving tank 24, a plug 25 is installed on it.

The material chopper operates as follows.

Initially, source material is batch-fed into the drum 16 through the feed openings 22. Next, the electric motor 4 is turned on, and through the driving pulley 7, the driven pulley 20 of the drum drive, as well as the driving gear 10 and the driven gear 27 simultaneously rotate the drum 16 and the bowl of the rotor 14, ensuring their rotation in the opposite direction.

With this scheme of rotation of the bowl of the rotor 14 and the drum 16 in opposite directions to each other, the following processes will occur.

When the rotor bowl 14 rotates above it, a constantly updated column of pieces of ground material will be formed. At the same time, pieces of the crushed material located above the rotor bowl 14 begin to move to its periphery under the action of centrifugal force, while simultaneously pressing against the radial ribs 15, and, having fallen into the active zone, are crushed by impacts, chipping, and abrasion.

Particles of material larger than the sizes of the outlet openings 26, made in the lateral surface of the drum 16, make it move in an upward spiral line. At the same time, the upper part of the material located in the cavity of the drum 16, under the influence of the blades 21, begins to rotate in the opposite direction to the upward flow of material particles from the action of the ribs 15 of the rotor bowl 14. When the opposing streams of material particles come into contact, they intensively mix and collide, leading to intense cracking and abrasion.

Further, the particles reduced as a result of such an interaction fall down under the action of their own weight to the boundary of their contact with the working surface of the rotor bowl 14.

Particles of material commensurate with the dimensions of the side holes 26 made in the side wall of the drum 16 are discharged by centrifugal force through these holes and enter the receiving tank 24.

After this cycle, the process repeats in the same sequence. Next, the workflow is repeated many times until the desired degree of grinding of the material is reached, it is withdrawn through the outlet openings 26 and the crushed finished product is accumulated in the receiving tank 24.

The technical and economic result of the proposed device is an increase in productivity due to the intensification of the grinding process by ensuring the opposite direction of the flows of the crushed material.

Claims (1)

A material shredder comprising a frame, a support plate, a drum with loading holes in its upper part, in which a support shaft, an electric motor with two output shaft ends, an electric motor stand, a V-belt drive, a rotor bowl with radial ribs, a support ring and bearing units, characterized the fact that the additional shaft on which the drive gear is mounted is connected to the lower end of the motor shaft and secured to it by means of a wedge connection, while the drive gear is in the bushing lenii with the driven gear wheel drive of the rotor cup and the interior cavity of the drum are installed blade.

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