RU2658702C1 - Centrifugal disk grinder - Google Patents

Abstract

FIELD: desintegrators and crushing devices.

SUBSTANCE: invention relates to the various materials crushing devices and may be used in production of construction materials and other industries. Centrifugal disk grinder comprises cylindrical body 1 with charging 2 and discharge 3 branches, oppositely rotating upper 4 and lower 5 disks with impact elements in the form of spiral 6, which are directed in opposite directions on upper 4 and lower 5 disks. On lower 5 disc coaxially with it, storage ring 7 with an internal diameter equal to the inner diameter of loading branch 2 is rigidly fixed, and a height equal to the distance between upper 4 and lower 5 disks, taking into account the technological gap with upper 4 disc. Tangential rectangular notch is formed along the entire height of storage ring 7, the inner surface of one of the side walls of which continues the working surface of spiral 6 of lower 5 disc.

EFFECT: invention makes it possible to improve the efficiency of the grinding process.

1 cl, 4 dwg

Description

The invention relates to devices for grinding various materials and can be used in the production of building materials, as well as in other industries.

A known design of a centrifugal impact mill containing a stepped housing, each subsequent step in which, counting along the movement of the material, is made of a larger diameter, a stepped rotor with beater horizontally located in the housing, loading and unloading nozzles (USSR Author's Certificate for the Invention No. 671839, BO2С 13 / 14, publ. 05.07.1979, bull. No. 25).

The disadvantages of the known designs is the low efficiency of the grinding process and low fineness of grinding.

The closest technical solution to the proposed one adopted as a prototype is a centrifugal disk chopper (RF Patent for utility model No. 145376, V02C 13/20, publ. 09/20/2014, bull. No. 26), containing a cylindrical body with loading and unloading nozzles, oppositely rotating flat upper and lower disks with percussion elements, percussion elements are made in the form of a spiral, which are directed in opposite directions on the upper and lower disks.

The following features of the prototype coincide with the essential features of the claimed invention: a cylindrical body with loading and unloading nozzles and oppositely rotating upper and lower disks with percussion elements, percussion elements are made in the form of a spiral, which are directed in opposite directions on the upper and lower disks.

However, this device is characterized by low efficiency of the grinding process. This is due to the insufficient number of particle collisions and insignificant abrasion and crushing loads on the crushed material.

The invention is aimed at improving the efficiency of the grinding process by increasing the number of particle collisions and increasing abrasion and crushing loads on the material being ground.

This is achieved by the fact that the centrifugal disk grinder contains a cylindrical body with loading and unloading nozzles, oppositely rotating upper and lower disks with shock elements in the form of a spiral, which are directed in opposite directions on the upper and lower disks. In the proposed solution, a storage ring with an inner diameter equal to the inner diameter of the loading nozzle and a height equal to the distance between the upper and lower disks, taking into account the technological gap with the upper disk, is rigidly fixed coaxially with it on the lower disk. Along the entire height of the storage ring there is a tangential rectangular cutout, the inner surface of one of the side walls of which continues the working surface of the lower disk spiral.

The invention is illustrated by drawings, where in FIG. 1 shows a longitudinal section AA in FIG. 2 (centrifugal disk chopper); in FIG. 2 - section BB in FIG. 1 (cross section of the grinding chamber); in FIG. 3 is a section BB of FIG. one; in FIG. 4 is a view D in FIG. 2.

The centrifugal disk grinder contains a cylindrical housing 1 with loading 2 and discharge 3 nozzles. Upper disk 4 is rigidly attached to the loading nozzle, for example by welding. The upper 4 and lower 5 disks rotate in opposite directions. Impact elements in the form of a spiral 6 are rigidly, for example by welding, attached to the upper 4 and lower 5 disks and directed in opposite directions. On the lower 5 disk coaxially attached thereto, for example by welding, a storage ring 7 with an inner diameter equal to the inner diameter of the loading 2 nozzle and a height equal to the distance between the upper 4 and lower 5 disks, taking into account the technological gap with the upper 4 disk. Along the entire height of the storage ring 7 there is a tangential rectangular cutout, the inner surface of one of the side walls of which continues the working surface of the spiral 6 of the lower 5 disk. The dimensions of the inner diameter and height of the storage ring 7 ensure that all the material passing through the loading pipe 2 enters the tangential rectangular cutout. The dimensions of the tangential rectangular cut-out should provide the necessary throughput of the storage ring 7 to eliminate its blockage.

Centrifugal disk grinder operates as follows. The crushed material, for example limestone, with a humidity of up to 4%, enters the loading pipe 2, to which the upper 4 disk is attached, and then enters the interior of the storage ring 7. Then, the material is sent through a centrifugal force to a tangential rectangular cutout that allows particles to move along the entire length of the spirals 6 lower 5 and upper 4 discs. Particles of material move along the inner surface of the side wall of a tangential rectangular cut-out, clinging to it opposite to the direction of rotation of the lower 5 disk. Further, the material particles continue to move along the working surface of the spiral 6 of the lower 5 disk. Since each particle travels the distance from the initial to the end point of the spiral 6 of the lower 5 disk, therefore, the number of interactions of material particles with oppositely rotating shock elements of the spirals 6 of the lower 5 and upper 4 disks increases. Here there are loads on the crushed material associated with abrasive and crushing forces created by oppositely rotating shock elements in the form of spirals 6 of the lower 5 and upper 4 disks. The finished product flies out of the housing 1 through the discharge pipe 3.

The installation of the storage ring 7 with a tangential rectangular cut provides a uniform supply of particles of the crushed material to the extreme point of the spiral 6 of the lower 5 disks, which increases the length of the passage of particles of material from the center to the periphery along the spirals 6 of the lower 5 and upper 4 disks. This leads to an increase in the number of interactions of the particles of the material with the shock elements of the spirals 6 of the lower 5 and upper 4 disks.

The proposed solution allows to increase the number of interactions of the particles of material between themselves and the shock elements in the form of spirals, crushing force and to provide an increase in the effect of destruction of the material from the action of abrasive forces. This greatly increases the efficiency of the grinding process.

Claims (1)

A centrifugal disk shredder comprising a cylindrical body with loading and unloading nozzles, oppositely rotating upper and lower disks with shock elements in the form of a spiral, which are directed in opposite directions on the upper and lower disks, characterized in that the storage disk is coaxially attached to the lower disk ring with an inner diameter equal to the inner diameter of the loading nozzle and a height equal to the distance between the upper and lower disks, taking into account the technological clearance from the upper m disk, along the entire height of the storage ring there is a tangential rectangular cutout, the inner surface of one of the side walls of which continues the working surface of the spiral of the lower disk.

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