RU2470711C1 - Jar mill - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to crushers to be used in mining, chemical and feed industries, etc. Proposed mill consists of two vibrating disc with inner surfaces composed of hollow truncated cones, rectangular cross-section plug-in ribs arranged radially along generating lines. Note here that said vibrating disc are secured on frames. Besides it comprises rotors made up of two revolving discs fitted on one shaft, drive and conical transfer casing. Additionally, proposed mill is equipped with second shaft aligned with the first one to support rotors made up of two revolving discs with grates, two different-diameter vibrating discs, drive and detachable hinge. Inertial vibrator is fitted on every vibrating disc and allows their individual adjustment.

EFFECT: higher efficiency and quality.

3 cl, 1 dwg

Description

The invention relates to devices for grinding and can be used in mining, chemical, food and other industries.

A device for grinding materials containing two vibrators, a rotor and a vibrating disk mounted on elastic elements is known, and an annular discharge gap is formed between the rotor and the vibrating disk. (SU 1335318 A1, 09/07/1987.)

The disadvantages of the device are the design complexity related to the manufacture of a bowl-shaped rotor and a vibrating heel, low productivity due to the difficulty of unloading the finished product, since it needs to move up to the discharge gap, the different fineness of the resulting finished product, grinding is only due to abrasion and impact, which leads to increased consumption of specific energy.

The closest in technical essence to the claimed technical solution is a rotary vibration mill containing two vibrators, a rotor, a vibrating disk mounted on elastic elements, the mill is additionally equipped with a second vibrating disk, upper and lower frames and a conical overload casing. (RU 2301111 C1, 06/20/2007.)

The disadvantages of the prototype are low productivity due to the accumulation of the finished product in the grinding zones, obtaining a product of different particle size distribution.

The objective of the proposed technical solution is to create a vibration mill that provides greater productivity while obtaining a finished product homogeneous in size and reducing energy consumption.

The specified technical result is achieved by the fact that the rotary vibration mill, consisting of two vibrating disks with an inner surface made in the form of hollow truncated cones, removable ribs of rectangular cross section, radially spaced along the generatrices of the truncated truncated cones, rotors of two rotating disks mounted on one the shaft, the drive and the conical overload casing, according to the invention is additionally equipped arranged coaxially with the first second shaft with rotors mounted on it in the form of two rotors mating disks with grates, two vibrating disks of various diameters, a drive and a detachable hinge, the vibrator being inertial and mounted on each vibrating disk with the possibility of separate adjustment.

The diameter of the subsequent disk is made larger than the previous one and depends on the degree of fineness of the crushed material.

The angle of inclination of the generatrix of the hollow truncated cone of the vibrating disk is directly proportional to the size of the material.

The invention is illustrated in the drawing, which shows a longitudinal section of a rotary vibration mill.

The mill consists of a loading funnel 1, vibrating disks 2, 3, shaft 4 with rotating disks 5, 6, driven in rotational motion from electric motors 7, vibrating disks 8, 9, mounted coaxially to shaft 4 of the second shaft 10 with rotating disks 11, 12, driven by rotation from the electric motor 13. The vibrating disks 2, 3, 8, 9 are made in the form of hollow truncated cones and are rigidly fixed to the supporting frames 14, 15, 16, 17 mounted on the frame 18 by means of springs 19. Inertial vibrators 20 are located at the ends support frames 14, 15, 16, 17. Vibrating e disks 2, 3 and rotating disks 5, 6 are provided with removable ribs 21, 22 of rectangular cross section. In the rotary disks 5, 6, 11, 12 there are grate-plates 23. The vibrating disks 2, 3, 8, 9 and the rotary disks 5, 6, 11 12, mounted together, form discharge slots 28, 29, 30, 31. The mill is equipped with detachable hinge 24 and conical reloading casings 25, 26, 27.

Rotary vibration mill operates as follows.

The source material through the feed funnel 1 enters the grinding zone I, where it is affected by the centrifugal force of the rotating disk 5 and the periodic impact force of the vibrating disk 2 created by inertial vibrators 20. The grinding occurs due to the collision of the material with ribs 21 and 22. The crushed material through the grate the lattice 23 and the discharge gap 28 enters the conical transfer casing 25, falling into the grinding zone II, where there is further grinding of the material. The crushed material is discharged through the grate 23 and the discharge gap 29 into the transfer casing 26, from where it enters the grinding zone III, where the material is crushed due to friction against the surface of the disks under the action of the periodic impact of the vibrating disk 8. Through the grate 23 and the discharge gap 30 the crushed material enters the reloading casing 27, from where it enters the grinding zone IV, in which the final grinding of the material to the required size occurs. Passing the grinding zone IV, the finished product is unloaded through the grate 23 and the discharge gap 31.

The location of inertial vibrators in each grinding zone allows you to independently adjust the grinding parameters by changing the amplitude and frequency of oscillations.

The angle of inclination α of the inner surface of the hollow truncated cone of the vibrating disk depends on the size of the crushed material and with a decrease in the size of the material it decreases.

The diameter of the disks of the grinding zones also varies depending on the size of the finished product and the diameter is increased to obtain a finer product.

Using the proposed device in comparison with the prototype will increase productivity and get uniform in size finished product, reduce energy consumption.

Claims (3)

1. Rotary-vibration mill, consisting of two vibrating disks with an inner surface made in the form of hollow truncated cones, removable ribs of rectangular cross section, radially spaced along the generatrices of hollow truncated cones, rotors of two rotating disks mounted on one shaft, a drive and a conical reloading casing, characterized in that it is additionally equipped with a coaxial first second shaft with rotors mounted on it in the form of two rotating disks with grates, two vibrating discs of different diameters, drive and detachable hinge, the inertial vibrator configured and installed on each vibrating drive with the possibility of individual adjustment. 2. The mill according to claim 1, characterized in that the diameter of the subsequent disk is made larger than the previous one and depends on the degree of fineness of the crushed material. 3. The mill according to claim 1, characterized in that the angle of inclination of the generatrix of the hollow truncated cone of the vibrating disk is directly proportional to the size of the material.

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