RU2520008C1 - Material dynamic grinder - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed grinder comprises the drum accommodating load-bearing shaft, shaft jacket, rotor bowl wit radial ribs, supporting ring, bearing assemblies, gearing and safety coupling. Note here that drum driving pulley and safety coupling whereat fitted is the rotor bowl driving pulley are fitted on motor shaft. Said drum has its kedge resting on extra bearing support.

EFFECT: simplified design.

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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 waste processing.

Close in technical essence is the design scheme of a dynamic self-grinding mill, in which the process of unloading of crushed material is improved (SU 1516139 A2, publ. 23.10.1989).

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

Close in technical essence is the design scheme of the dynamic self-grinding mill, in which the process of unloading the crushed material in is improved (SU 1516139 A2, 10.23.1989).

The disadvantage of the mill is the relatively high specific energy consumption.

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

The disadvantage of this device is the relatively high capital, operating costs and complexity of the design of the device. The objective of the proposed technical solution is to reduce operating costs and simplify the design of the device.

The objective of the invention is to reduce capital and operating costs by simplifying the design of the device.

The problem is solved as follows.

The grinder of dynamic self-grinding material contains a drum in which the support shaft, the shaft jacket, the stuffing box cover, the rotor bowl with radial ribs, the support ring and bearing units are located; an electric motor, kinematic gears, a safety clutch, characterized in that the drive pulley of the drum drive, as well as the safety clutch on which the drive pulley of the rotor bowl is mounted, are mounted on the motor shaft, and the drum is supported by a protrusion on an additional bearing support.

The proposed device is illustrated in the drawing, which shows the grinder dynamic self-grinding material (figure 1).

The grinder of dynamic self-grinding of the material contains a plate of the drum 1, rigidly connected to the plate of the electric motor 6. On the plate of the drum 1, the support shaft 14 is mounted and rigidly fixed on it by the lower end. The upper end of the support shaft 14 is mounted in the upper bearing assembly 22, which, in turn, installed in the upper part of the drum 10. To load the source material in the upper part of the drum 10 mounted loading funnel 18.

On the support rack 14 using the lower 9 and upper 22 bearing units mounted rotor bowl 8 and the drum 10. The drum 10 is supported by the protrusion 77 on the additional bearing support 15.

On the lower part of the drum 10, with the help of screw connections, a driven pulley 11 of the drive of the drum 10 and a support ring 12 are mounted, which serves to hold in the cavity of the drum 10 material that has not reached the required degree of grinding. To the lower part of the rotor bowl 8, a driven pulley 7 of the rotor bowl drive 8 is connected by screw connection. Inside the rotor bowl 8, ribs 19 are mounted dividing its cavity into six equal sectors.

The shaft jacket 13 of the support column 14 and the stuffing box cover 16 mounted on its end, mounted in the cavity of the drum 10, serve to protect the outer surface of the support column 14 from premature wear by the material circulating inside the cavity of the drum 10. The shaft jacket 13 is connected by a screw connection to drum 10.

On the plate of the electric motor 6, the strut of the electric motor 2 is rigidly fixed, on which the electric motor 3 is mounted using a screw connection.

Using the keyed connection, a lower drive pulley 5 of the drum drive 10 is mounted on the shaft of the electric motor 3. In this case, a conical hole is made inside the shaft of the electric motor 3, in which a safety clutch 4 is installed, connecting the shaft of the electric motor 3 with the drive pulley 23 of the rotor bowl drive 8.

Kinematic gears from the electric motor 3 to the bowl of the rotor 8 and the drum 10 can be of any type - V-belt, as in this example, gear, chain, using other gears (screw, worm, etc.). For the release of the crushed material from the device, outlet openings 20 are made in the side walls of the rotor bowl 8. A receiving hopper 21 is installed to collect the crushed material.

Shredder dynamic self-grinding material works as follows. Initially, source material is batchly charged into the drum 10 through feed hoppers 18. Next, an electric motor 3 is turned on and simultaneously through the drive 5 and the driven 11 drive pulleys of the drum 10, as well as the drive 23 and driven 7 drive pulleys of the rotor bowl 8 rotate the drum 10 and the rotor bowl 8.

In the process of work, an updated column of pieces of material above the rotor bowl 8 is constantly formed. When the rotor bowl 8 rotates, the pieces of crushed material located in its cavity begin to move to its periphery under the action of centrifugal force, while simultaneously pressing against the radial ribs 19, and, falling into the active the area is crushed due to impacts, chipping and abrasion.

Particles of material larger than the dimensions of the outlet openings 20 in the side walls of the bowl of the rotor 8 move in it along an ascending toroidal line and then, together with the original bulk material and partially crushed, are previously lowered into the working area of the cavity of the bowl of the rotor 8. Particles of material commensurate with the size of the outlet openings 20 made in the side walls of the bowl of the rotor 8, are derived due to centrifugal force through these holes beyond the outer surface of the side surfaces of the bowl of the rotor 8 and then under the action of their own forces gravities drop down and fall into the receiving hopper 27.

The grinder of dynamic self-grinding of the material is equipped with a closing kinematic mechanism consisting of an electric motor shaft 3 connected through a V-belt drive with a drum 10, as well as a safety clutch 4, which ensures that the electric motor shaft is connected through a V-belt drive with the rotor bowl 8 and the material located above the rotor bowl 8.

At the same time, due to different gear ratios of the lower and upper branches of the grinder of the dynamic self-grinding material obtained by installing a removable lower 23 and upper 5 pulleys of different diameters, there is an accumulation and lag for each rotation of the angular speeds of the rotor bowl 8 and drum 10. Due to this lag, kinematic mismatch of their rotation. Hence, it becomes possible to use the power circulation arising in the closed circuit "rotor bowl - drum". In this case, the total power on the bowl of the rotor 8 will be much larger than on the shaft of the electric motor 3. This leads to stress in pieces of material that fall into the contact zone of the ascending particles located in the working area of the bowl of the rotor 8 and others that fall down under the influence of their own weight to the border of their contact with the working surface of the rotor bowl 8. This ensures the grinding of contacting pieces of material with increased contact stress with intensive mixing. Upon reaching the calculated maximum moment on the rotor bowl 8, determined by the elastic torsion strain of the material of the shaft of the motor 3, the safety clutch 4 is released and the load is released in a kinematic closed loop. After this, the safety clutch 4 closes again, and the loop system returns to its original state, in which there is no lag in rotation speed between the output end of the motor shaft 3 and the rotor bowl 8 (upper and lower kinematic branches of the grinder of dynamic material grinding).

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, output through the outlet 20 and accumulating it in the receiving hopper 21 is achieved.

The technical and economic result of the proposed device is to reduce capital and operating costs by simplifying the design of the device by using a standard electric motor.

Claims (1)

A grinder of dynamic self-grinding material, comprising a drum in which a support shaft, a shaft jacket, an oil seal cover, a rotor bowl with radial ribs, a support ring and bearing units, an electric motor, kinematic gears, a safety clutch, characterized in that the drive pulley drives the drum, are located, and The safety clutch, on which the drive pulley of the rotor bowl drive is mounted, is mounted on the electric motor shaft, and the drum is supported by the protrusion on an additional bearing support.

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