RU2614782C1 - Disc mill for grinding grain - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: disc mill comprises a housing (2) with a hopper (1), the loading (3) and the unloading (4) holes. Inside the housing, the driving (5) and the passive (8) discs are mounted eccentrically with respect to each other. The drive disc with a central hole (7) for loading the milled product into the inter-disc space is cantilever fitted on the driving shaft. The passive disc is mounted with the ability of free rotation on the shaft fixed to the housing. The passive disc is mounted with the possibility of changing (11) the eccentricity with respect to the drive disc. The grinding discs consist of at least three concentric rings (12-14) with a double-sided grooving of riffles of different pitch and depth. The riffle size is decreased from the central ring to the outer ring. The rings are mounted on the base (16).

EFFECT: reduction of flour particles in the final product.

3 dwg

Description

The invention relates to a device for grinding grain and can be used in farms, at the enterprises of food and feed industry.

Known disk mill (patent of the Russian Federation No. 2077130, B02C 7/10 from 04/10/1997). The mill includes a casing with loading and unloading openings, equipped with a hopper, inside the casing there is a drive disk eccentrically relative to each other, cantileverly mounted on the drive shaft and made with a central hole for loading the crushed product into the interdisk space, and placed on the shaft mounted on the casing , passive disk mounted with the possibility of free rotation. The grinding surface of each disk consists of an inner and outer belt with riffles, in addition, the passive disk is mounted with the possibility of changing the eccentricity relative to the leading disk, the grinding surface of each disk is additionally equipped with a middle belt with riffles placed between the inner and outer belts, the pitch and depth of the middle belt riffs equal to the arithmetic mean values of the pitch and depth of the grooves of the inner and outer belts, respectively.

The disadvantage of this design is the complexity of changing the degree of grinding of the grain and a large number of dust particles in the finished product. This drawback is associated with the loading of the inter-disk space through the central holes of one of the disks and the inability to change the residence time of particles in the grinding zone.

The objective of the invention is to improve the quality of grinding grain and reduce the cost of maintenance of the mill.

The technical result is the reduction of dust particles in the finished product, simplifying the adjustment of the degree of grinding and ensuring the same particle size of the particles in the grinding process

The technical result is achieved by the fact that a disk mill for grinding grain, which includes a housing with loading and unloading holes, equipped with a hopper, a drive disk mounted cantileverly mounted on the drive shaft and made with a central hole for loading the ground product into the eccentric relative to each other the inter-disk space, and located on the shaft mounted on the housing, a passive disk mounted with the possibility of free rotation, in addition, a passive disk mount It is possible to change the eccentricity relative to the leading disk, the grinding surface of each disk is equipped with corrugations of different steps and depths, decreasing from the inner and outer belts, grinding disks consist of at least three concentric rings with two-sided cutting of the corrugations mounted on the base, and the size of the corrugations decreases from the central ring to the outer.

If it is necessary to obtain coarse grinding, the outer and middle rings must be dismantled, leaving only the inner ring; for fine grinding, the use of all rings is necessary. It is possible to use a different number of rings on the master and slave drives. The presence of corrugations on both surfaces of the rings allows extending their service life, so when wearing corrugations on one side of the disk, it must be turned over by using corrugations on the opposite surface of the ring.

The proposed device is illustrated by drawings in FIG. 1 shows a diagram of a disk mill for grinding cereals; in FIG. 2 shows a grinding disc assembly; in FIG. 3 shows a section aa of FIG. 2.

The disk mill (Fig. 1) includes a hopper 1 mounted on the housing 2 having a loading hole 3 and an unloading hole 4. Inside the housing 2 there are two grinding discs, one of which is the drive disk 5, which is cantilevered on the drive shaft 6 has a Central hole 7 for loading the crushed product (grain) into the interdisk space, the second passive disk 8 is installed with the possibility of free rotation. The disk 8 is mounted eccentrically relative to the disk 5. The disk 8 can be moved in the longitudinal direction before work due to the spring mechanism 10, which allows you to pre-adjust the gap between the grinding disks 5 and 8 depending on the required quality of the product. The disk 8 is mounted with the possibility of changing the eccentricity relative to the disk 5 before starting work using the mechanism 11.

Each of the disks (Fig. 3) consists of an inner ring 12, a middle 13 and an outer 14, equipped with flutes having different pitch and depth. These rings, FIG. 3, have flutes on both sides. The rings are fixed on the base 15, a gasket 16 is installed between the base and the grinding rings.

Disk mill operates as follows. The grain from the hopper 1 through the loading hole 3 enters the grinding yard, where it is captured by the flutes of the inner ring 12 of the leading and passive discs and carried away in rotational motion. During the interaction of the corrugations of the inner rings 12, the product is preliminarily crushed, then part of it under the action of centrifugal forces, as well as the pressure created by the newly incoming product, moves in the interdisk space of the inner 12, middle 13 and outer 14 rings. To increase the size of the grinding, it is necessary to dismantle the outer ring or the outer one with the middle rings, the fewer rings remain on the base of the disk, the larger the size of the derty will be. When the rings wear, they are turned over and a second working surface is used. All this contributes, compared with the prototype, to obtain a crushed product of various sizes with a minimum amount of dust particles, as well as to extend the life of the grinding rings.

Claims (1)

A disk mill for grinding grain, which includes a housing with loading and unloading holes, equipped with a hopper, inside the housing there is a drive disk eccentrically relative to each other, cantileverly mounted on the drive shaft and made with a central hole for loading the crushed product into the interdisk space, and placed on a shaft mounted on the housing, a passive disk mounted with the possibility of free rotation, in addition, the passive disk is mounted with the possibility of changing the eccentricity theta relative to the leading disk, the grinding surface of each disk is equipped with grooves of different steps and depths, decreasing from the inner and outer belts, characterized in that the grinding disks consist of at least three concentric rings with two-sided cutting of the grooves mounted on the base, and the size of the grooves decreases from the central ring to the outer.

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