RU1827291C - Comminution device - Google Patents

Abstract

Usage: in devices for grinding m co-products. The device comprises a cylindrical body in which the inner chamber is located symmetrically with longitudinal slots on the side wall in which the knives are fixed. A disk with vertical blades mounted on it and driven into rotation is mounted in the lower part of the chamber. The blade blades have a cross-sectional shape of an arc with a radius equal to 0.75-0.8 of the radius of the disk oriented by the convex part in the direction of rotation, on the convex part of the blades are located along the entire height of the series of protrusions with sharp ends, the knives are fixed in sockets made on the inner side of the chamber wall and installed along the chamber wall, while the cutting edge of each knife is adjacent to the gap. The blades and knives have a minimum clearance between them. The conical inner chamber is separate from the housing and rotates in the opposite direction to the rotation of the blade disc. The grinding efficiency is ensured by fixing pieces of material to be crushed along the edges of the blades at the surface of the chamber wall. Efficient loading of knife blades is provided. 2 s. P. f-ly. 2 ill. Yo

Description

The invention relates to the field of processing industry, mainly to m processing industry and can be used for fine grinding of bones and other hard materials.

The aim of the invention is to increase productivity, reliability and stability.

In FIG. 1 is a sectional elevation view of a device; in FIG. 2 is a section AA in FIG. 1.

The device comprises a cylindrical body 1, a loading funnel 2, an inner chamber 3, made in the form of a truncated cone, directed upward by a large base. The chamber 3 has longitudinal slots 4 on the side wall 5, expanding in the radial direction. Nests 6 are made in the chamber wall near each of the slots, in which knives 7 are fixed along the entire length of the slit along the wall 5 of the chamber 3. The knives have a front surface 8 parallel to the wall 5 and a back surface 00

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9, mounted flush with the surface of the inner wall of the slot 4. The cutting edge 10, formed by the intersection of surfaces 8 and 9, is parallel to the wall 5 of the inner chamber. The cutting edge of each of the knives adjoins the slit, protruding inward from the edge of the slit to a minimum distance, ensuring passage of the removed chips and amounting to 0.1-0.5 mm. In the lower part of the chamber 3, a disk 12 is mounted on the vertical drive shaft 11, on which blades 13 are mounted along the entire height of the chamber 3, having an arc shape in cross section. On the convex side of the blades 13 there are rows of protrusions with sharp ends 14. The size of the protrusions decreases toward the periphery of the blade. The inner chamber is configured separately from the housing 1 to rotate in a direction opposite to the rotation of the disk. The chamber has a lid 15 rigidly connected to the side wall 5. The bottom of the chamber 16 has an aperture and is mounted on the shaft 17. In the bottom of the chamber and the housing, angular contact bearings 18 are mounted, which provide for fastening and independent rotation of the chamber and the disk. In the lower part of the housing there is a pipe 19 for discharging the ground mass. In the lower part of the chamber 3, on the outside of the wall 6, a blade 20 is fixed for unloading the ground mass from the housing 1.

The device operates as follows.

The disk 12 mounted in the inner chamber 3; is rotated by a drive (not shown) connected to the drive shaft 11. The chamber 3, through the shaft 17 and bearings 18, is rotated in the opposite direction to the disk. Coarse bones with pieces 40-50 mm in size are loaded through a funnel 2 into a rotating inner chamber 3. Once on a rotating disk 12 with blades 13, the bone is evenly distributed and discarded to the blades of the knives 7. Under the influence of centrifugal force, the conical shape of the chamber ensures uniformity distributing pieces of bone along the knife blades. Pieces of bone are fixed on the convex side of the blades 13 by means of protrusions 14. Moving along the knives 7, the pieces interact evenly with the cutting edges 10 and are quickly crushed to a particle size of 0.1-0.5 mm, which are ejected through the slots 4 into the space between the walls of the chamber 3 and bodies 1. The resulting crushed mass is discharged from the device by a blade 20 through a pipe 19.

Claims (3)

1. The grinding device comprising a housing, an inner chamber with longitudinal slots on the side wall, knives with a cutting edge parallel to the wall of the inner chamber, reinforced along the length of the slots, a disk with vertical blades mounted in the lower part of the inner chamber for rotation in the horizontal plane, characterized in that, in order to increase productivity, reliability and stability, the blades have in cross section, the shape of an arc with a radius equal to 0.75-0.8 of the radius of the disk, oriented by the convex part in the direction of rotation of the disk, on the convex part of the blades are made along the entire height of the series of protrusions with sharp edges s, and along the inside the chamber walls are made nests in which the knives are fixed, while the cutting edge of the knife adjoins the gap. 2. The device according to claim 1, characterized in that the inner chamber is made separately from the housing rotatably in a direction opposite to the direction of rotation of the disk. 3. The device according to claim 1, characterized in that the inner chamber is made in in the form of a truncated cone directed upward by a large base. L Aa eleven FIG. Z 40 45 50