RU2845648C1 - Centrifugal grinder - Google Patents

Abstract

FIELD: agricultural machines.

SUBSTANCE: invention relates to agricultural engineering, in particular, to machines for grinding of fodder grain and other loose materials used for animal feeding. Grinder contains a cylindrical bed with a power transmission located inside it, on the central shaft of which a pair of angular cutters are rigidly installed at the top, and four pairs of twin angular cutters are rigidly installed on the sides of the loading funnel body. Flat knife is mounted on the shaft in contact with the perforated plate, and the shaft is installed on bearings and is connected to the electric motor via a safety coupling.

EFFECT: grinder ensures increased grinding efficiency.

1 cl, 3 dwg

Description

The invention relates to agricultural engineering, in particular to machines for grinding feed grain and other bulk materials used for feeding animals.

A grinder is known (patent No. 2137547, B02C 7/02), consisting of two coaxially located and rotating towards each other disks. On the inner surfaces of the disks, annular grooves are made in the form of alternating protrusions and depressions of a triangular shape, and the angle at the tops of the protrusions is equal to the angle of the depressions. In addition, on the inner surfaces of the disks, radial grooves are made in which knives are installed, the shape of which copies the annular grooves of the disks and protrudes above their surface.

A centrifugal mill for grinding grain and bulk materials is known, containing two coaxially located and rotating towards each other disks with alternating concentric truncated cones, on which grinding ribbed blades are installed (see USSR Author's Certificate No. 552997, B02C 7/02, 1977).

A device is known (patent No. 2793199) comprising a frame on which a cylindrical housing is placed, with a central shaft placed inside it, installed in a vertical plane, on which, by means of a splined connection, star-shaped knives are mounted, performing a rotary motion. Counter knives, with star-shaped cutouts, are rigidly fixed on the inner projection of the housing so that when the knives and counter knives come into contact, the grain is crushed. A belt drive is mounted on the free end of the central shaft, connected to an electric motor.

The closest in technical essence is a centrifugal grinder (patent No. 2627536, B02C 7/02), containing coaxially located disks mounted on one shaft with the ability to rotate in different directions. On the inner surface of the disks, on fixed axes, with the ability to rotate, angular conical cutters are mounted. The cutters are mounted with the ability to enter the right disk into the cavity formed by the cutters of the left disk.

The technical result is an increase in the efficiency of grinding and the production of a product with an even granulometric composition.

The technical result is achieved in that the device contains a cylindrical frame with a power transmission located inside it, on the central shaft of which a pair of angular cutters are rigidly installed at the top, four pairs of paired angular cutters are rigidly installed on the sides of the body of the loading funnel, while a flat knife is mounted on the shaft in contact with a perforated plate, and the shaft is mounted on bearings and connected to an electric motor through a safety clutch.

Fig. 1 shows a centrifugal grinder, side view, section; Fig. 2 - section; Fig. 3 - section.

The proposed invention consists of a frame 1 of cylindrical shape, with a power transmission located inside it, on the central shaft 2 of which a pair of angular cutters 3 is rigidly installed at the top, and on the sides on the body of the loading funnel 4 four pairs of paired angular cutters 5 are rigidly installed, while on the shaft 2 at the bottom a flat knife 6 is mounted in contact with a perforated plate 7, and the shaft is mounted on bearings 8 and through a safety clutch 9 is connected to an electric motor 10.

The shredder operates as follows. After switching on the electric motor 10, the rotation is transmitted to the central shaft 2, on which a pair of angular cutters 3 is rigidly installed at the top, performing a rotational movement. As a result, the feed material is crushed between the rotating angular cutters 3 and the stationary installed paired angular cutters 5. Then, under the action of their own weight, the particles fall down onto the perforated plate 7, where additional crushing occurs due to the operation of the flat knife 6, after which the crushed material is removed beyond the shredder.

As a result, the grinding efficiency increases.

Claims (1)

A centrifugal grinder comprising a housing, characterized in that the device comprises a cylindrical frame with a power transmission located inside it, on the central shaft of which a pair of angular cutters are rigidly installed, and on the sides of the loading funnel housing four pairs of paired angular cutters are rigidly installed, while at the bottom a flat knife is mounted on the shaft in contact with a perforated plate, and the shaft is mounted on bearings and is connected to an electric motor through a safety clutch.