SU856545A2 - Centrifugal vortex-type mill - Google Patents

Description

(54) CENTRIFUGAL-VORTEX MILL

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 The invention relates to the technique of grinding loose materials and can be used in the construction and other industries.

According to the main auth. No. 374096 is known for a centrifugal-vortex mill, containing two coaxially located on vertical axes with the possibility of rotation in different directions of the disk, the upper of which is mounted on a hollow pin with a feeding pipe and blades inside, and the bottom on the axle with an impeller inside according to the type of axial valve The torus, on the sides of the disks facing each other, concentrically 15, houses a series of shells forming annular working chambers. Elements mounted on the outer sides of each chamber are mounted inside the chamber, for example, plates. 20 At the periphery of the upper disc, the blades are mounted according to the type of centrifugal fan 1.

The discs are enclosed in a casing with a tangential arrangement of the nozzle from the water of the dust-gas mixture.

In this mill, in the process of grinding the material, a large amount of thermal energy is released, which leads to significant heating as

barrel organs as well as ground material. This reduces the efficiency of the process and prevents the use of mills of this design in the production of heat-resistant materials prone to spontaneous combustion or decomposition under the action of high temperatures.

The purpose of the invention is to intensify the process, as well as the possibility of using a mill for grinding heat-resistant materials.

This is achieved by the fact that in the centrifugal-vortex mill the casing is equipped with drainage pipes, and sprinklers and devices are installed on the outer sides of the disks to prevent coolant from entering the inside of the working chambers.

In addition, each device to prevent coolant from entering the inside of the working chambers may be made in the form of a drain threshold fixed on the periphery of the outer side of the disk and a cone mounted on the casing.

The introduction of sprinklers into the casing of the mill, which cool the outer surfaces of the disks, makes it possible to reduce the temperature of the working bodies of the sprinklers, and

the material to be crushed and those themselves to intensify the grinding process and to ensure the possibility of using the mill in the production of grinding tarmo, unstable materials.

1 In addition, the drain pipes and devices to prevent coolant from entering the inside of the working chambers allow the grinding process to be carried out without the coolant entering the working cavity of the mill. The drawing shows a centrifugal vortex mill, a longitudinal section,

The centrifugal-vortex mill contains two axially coaxially located on vertical axes with the possibility of rotation in different directions of the disk - the upper 1 and lower 2, the upper disk 1 is mounted on a hollow pin 3, inside which are mounted the blades 4, a. the lower disk 2 is on the trunnion 5, in the cavity of which the impeller 6 is installed, in the manner of an axial fan. In the cavity of the trunnion 3 is the feed pipe 7 for loading material. On the sides of the disks 1 and 2 facing each other there are concentrically arranged a row of shells 8, forming annular working chambers. On the outer shells of each chamber, the accelerating elements 9 mounted in the chamber, in the form of inclined plates, are formed along the intersection lines with the horizontal plane of the disk and the vertical surface of the shells angles more than 1t: / 2 to the direction of the vector of the circumferential speed of rotation of the disk. On the periphery of the upper disc 1, blades 10 are installed in the manner of a centrifugal fan. The disks 1 and 2 are closed in the casing 11, which has a tangentially located pipe 12 for discharging the dust-gas mixture and pipes 13 and 14 for draining the coolant, in the casing 11 on the outside of the disks 1 and 2 are installed irrigators 15 for supplying the cooling liquid and the device for preventing ingress coolant inside the working chambers, each of which is made of drain threshold 16 and 17 and coolant discharge cones 18 and 19; Drain thresholds 16 and 17 are made in the form of shells and fixed on the periphery of the outer sides of the discs But the upper 1 and lower 2, and the cones 18 and 19 are mounted on the casing n4 11.

P;. The work of the mill source material is loaded through the pipe 7 into the center of the mill.

The elements 9 of the lower disk 2 and the air flow generated by the impeller 6 and the blades 4 material particles are thrown to the periphery and the cavity of the upper disk 1. Obtaining kinematic energy and direction of air flow, the particles sequentially move from the center to the periphery through all working chambers and are crushed due to the collision and spraying with each other, then the dust-gas mixture is discharged through the pipe 12 by means of a swirling flow of the gas-gas mixture, which is created by the blades 10 of the upper disc 1. To reduce the load eva Melnov gical working bodies and grinding material 15 is fed through sprinklers cooling zhikost which ORS aaet exterior (outside) sides of the rotating discs 1 and 2.

Under the action of centrifugal force, the coolant film breaks off the drain thresholds 16 and 17 and is discharged by means of the cones 18 and 19. Through the drain pipes 13 and 14. The thresholds 16 and 17 and the cone 18 and 19 form a hydraulic lock that prevents the coolant from penetrating into the working cavity of the mill .

As a result of cooling of the working bodies of the mill and the material being crushed, the intensity of the grinding process increases, and the scope of application of the mill of this design expands. It can be used to grind heat-resistant materials, since the working process will take place at a temperature of about 4 ° -50 ° C.

Claims (1)

1. USSR author's certificate 374096, class, B 02 C 7/08, 1971,