RU2849081C1 - Centrifugal grinder - Google Patents

Abstract

FIELD: agricultural engineering.

SUBSTANCE: invention relates to machines for grinding feed grain and other bulk materials used for feeding animals. The device comprises a cylindrical frame with a power transmission unit located inside it, on the central shaft of which a pair of angular cutters is rigidly mounted at the top, and four pairs of paired cutters are rigidly mounted on the sides of the loading funnel housing, 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 via a safety clutch.

EFFECT: 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 (patent no. 2137547, B02C 7/02) is known, consisting of two coaxially positioned discs rotating toward each other. The inner surfaces of the discs are provided with annular grooves in the form of alternating triangular protrusions and depressions, with the angle at the apex of the protrusions equal to the angle of the depressions. Furthermore, the inner surfaces of the discs are provided with radial grooves containing knives, which replicate the shape of the annular grooves of the discs and protrude 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 (patent no. 2793199) is known, comprising a frame supporting a cylindrical housing with a central shaft mounted vertically within it. Star-shaped knives are mounted to the shaft via a splined connection and rotate. Counter knives, with star-shaped cutouts, are rigidly secured to the inner projection of the housing so that the grain is crushed when the knives and counter knives come into contact. A belt drive connected to an electric motor is mounted on the free end of the central shaft.

The closest in technical essence is a centrifugal grinder (patent no. 2627536, B02C 7/02), comprising coaxially arranged discs mounted on a single shaft and capable of rotating in opposite directions. Conical angular cutters are mounted on fixed, rotating axles on the inner surface of the discs. The cutters are mounted so that the right disc can fit into the cavity formed by the cutters on the left disc.

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

This is achieved by the fact 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 is rigidly mounted at the top, and on the sides of the body of the loading funnel four pairs of paired cutters are rigidly mounted, while 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.

Fig. 1 shows a centrifugal grinder, a side view, a section; Fig. 2 shows a section A-A in the upper part of the device, a top view; Fig. 3 shows a section B-B in the lower part of the device, a bottom view.

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 mounted at the top, and on the sides of the body of the loading funnel 4 four pairs of paired cutters 5 are rigidly mounted, while on the shaft 2 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 electric motor 10 is turned on, rotation is transmitted to central shaft 2, on which a pair of angular cutters 3 are rigidly mounted at the top, performing a rotating motion. As a result, the feed material is crushed between the rotating cutters 3 and the stationary cutters 5. Then, under their own weight, the particles fall downward onto perforated plate 7, where further crushing occurs due to the action of flat knife 6, after which the crushed material is discharged from the shredder. This increases the shredding efficiency.

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 is rigidly mounted at the top, and on the sides of the loading funnel body four pairs of paired cutters are rigidly mounted, while 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.