RU122910U1 - TWO-STAGE DYNAMIC SELF-MILLING MILL - Google Patents

Abstract

A two-stage dynamic autogenous grinding mill, including a frame, a housing, loading and unloading pipes, a rotor shaft, a rotor bowl, an internal partition, an electric motor, a V-belt transmission, pulleys, a bearing unit, characterized in that it additionally has a prefabricated and additional The bearing unit mounts an additional rotor shaft with an additional rotor bowl attached to it, connected to the electric motor through a V-belt transmission, and the additional housing is connected to the upper housing by means of a flexible connecting channel.

Description

The claimed technical solution relates to crushing and concentration equipment for grinding minerals, and can also be used in various industries, in particular, in the coal, ore, metallurgical and construction materials industries.

From the prior art development, a technical solution is known for the dynamic self-grinding of material RU 2064287 C1, V02C 13/14, t July 20, 1994, containing a vertical cylindrical housing, a shaft coaxially located therewith mounted in bearing bearings, in the lower part the shaft is connected to the drive, in the upper part with a cup-shaped rotor having the form of a full inverted hollow truncated cone.

Also known is the invention SU 1308382 A1, B02C 113/14 of 05/07/1987, which contains a vertically arranged cylindrical body coaxially mounted with partitions and screens, a vessel mounted under a bowl-shaped rotor, and communicated with channels with a cavity of the latter for supplying the transported agent .

The disadvantage of such design solutions is the need to install several units of grinding equipment into the production line of the finished product, which leads to an increase in material, capital and operating costs.

The technical result of the claimed technical solution is the versatility of the device, achieved by combining two grinding operations in one machine.

The problem is solved as follows.

A two-stage dynamic self-grinding mill, includes a frame, a housing, loading and unloading nozzles, a rotor shaft, a rotor bowl, an internal baffle, an electric motor, a V-belt drive, pulleys, a bearing assembly and is distinguished by the fact that an additional and additional housing are additionally installed in it, and in an additional An additional rotor shaft with an additional rotor cup mounted on it is connected to the bearing unit, and is connected to the electric motor via a V-belt drive, the additional housing being connected with upper housing via flexible connecting channel.

The proposed device is illustrated in figure 1, which shows a two-stage dynamic self-grinding mill, consists of an upper 2 and an additional 9 housings interconnected by bolt connections and mounted on a frame 18. Inside the housings there is a detachable rotor shaft 8, consisting of an upper 12 and an additional shaft 22, on which the upper 4, additional 17 rotor cups with exhaust holes made in their inclined surfaces and mounted in the upper 5 and additional tion 14 bearing assemblies. The transmission of torque to the split shaft of the rotor 8 is carried out from the electric motor 16 mounted on the frame 18, through a V-belt transmission, a drive 15 and a driven 13 pulleys.

To release the crushed material in the first cascade from the upper casing 2 into the working area of the additional casing 9, a flexible connecting channel 7 is mounted on the lower part of the precast casing 6, connecting the 1st and 2nd cascades of a two-stage dynamic self-grinding mill to each other.

The release of the required degree of grinding of the source material, produced in the additional housing 9, is carried out through the lower outlet pipe 11 into the container of the finished product 19.

The source material is loaded through the loading nozzle 7. To facilitate the exit of the crushed material from the 1st cascade, an internal partition 3 is installed in the upper casing 2, in the side walls of which there are lateral openings through which the material flows through the gap D into the collection casing 6, where it is mixed with material falling into it through the side holes of the upper rotor bowl 4.

The work of a two-stage dynamic self-grinding mill is as follows.

Initially, the source material is batchly charged into the upper housing 2 through the loading pipe 1. Next, the electric motor 16 is turned on and, through the V-belt drive, the detachable rotor shaft 8 is rotated with the upper 4 and additional 17 rotor cups synchronously rotating with it and simultaneously rotating with it.

In the initial period of rotation of the upper rotor bowl 4, pieces of material loaded through the loading pipe 1 into the upper body 2 and located above it begin to move to its periphery under the action of centrifugal force, simultaneously pressing against the radial ribs 20. Once in the active zone, these pieces are crushed due to blows, chipping and abrasion between them. Particles of material larger than the size of the outlet holes in the upper bowl of the rotor 4, move in the working area of the upper housing 2 along an ascending toroidal line and then, together with the source material, fall into the (active) working cavity of the upper bowl of the rotor 4.

One part of the material particles, commensurate with the dimensions of the side holes made in the lateral plane of the upper bowl of the rotor 4, is discharged through these holes due to centrifugal force, and enter the collection chamber 6 and then, under the action of gravity of the particles themselves, is released through the flexible connecting channel 7 into additional housing 9, located above the additional bowl of the rotor 17, where they are exposed to this bowl of the rotor 11 with the ribs 21 installed inside its cavity.

In the additional casing 9 (2nd cascade), pre-crushed material particles in the 1st cascade are similar to those in the upper casing 2 starting to move to its periphery under the action of centrifugal forces, while simultaneously pressing against the radial ribs 21. In the additional casing 9, the pre-crushed material falling into the core is also crushed by impacts, chipping, and abrasion. Particles of material larger than the size of the outlet in the additional bowl of the rotor 17, make a movement in the working area of the additional housing 9 along an ascending toroidal line. In this case, material particles having sizes smaller than in the side openings of the additional rotor bowl 17 are discharged from the additional body 9 and, through the lower collection chamber 10, are discharged from the two-stage dynamic self-grinding mill and the finished product tanks 19 are accumulated.

The technical and economic result of the proposed device is to reduce energy and operating costs due to the concentration of two stages of grinding operations in one machine.

Claims (1)

A two-stage dynamic self-grinding mill, including a frame, a housing, loading and unloading nozzles, a rotor shaft, a rotor bowl, an internal baffle, an electric motor, a V-belt drive, pulleys, a bearing assembly, characterized in that it has an additional and additional housings installed, and in an additional An additional rotor shaft with an additional rotor cup mounted on it is connected to the bearing unit, and is connected to the electric motor through a V-belt drive, and the additional housing Combined with the upper housing via a flexible connecting channel.