RU2412819C1 - Granulator press - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to press equipment for pelletizing pre-crushed materials of vegetable, animal or mineral origin. Proposed device comprises active annular matrix arranged on turn table to accommodate passive pressing rollers fitted on drive rod. The matrix has inner cylindrical surface with through holes. The cone for feeding the pressing material is accommodated on the matrix. The chaged limited rings are fastened to the cone and face plate. Side surfaces of rings facing the pressing roller end faces form annular chamber with matrix inner cylindrical surface for pressing rollers to enter there. Limiting rings may be arranged to axially move and locked. Surfaces of said rings that stay in contact with pressed material may have cycloidal shape.

EFFECT: higher efficiency.

3 cl, 6 dwg

Description

The invention relates to the field of technology for granulating pre-ground materials of plant, animal and mineral origin.

Known press granulators containing an active ring matrix mounted on a face plate with an inner cylindrical surface perforated with through dies, passive pressing rollers mounted on it, mounted on a carrier, and a cone mounted on the matrix for feeding the pressed material [Zhislin Y. M., Pikus B .AND. Crushing and pressing equipment of the feed mill. - M .: Agropromizdat, 1987. - P.57-84], [Technological equipment of industry enterprises (grain processing enterprises). / L.A. Glebov [et al.]. - M .: DeLi print, 2006. - S.754-771].

This design is characterized by lateral extrusion of the pressed material in the zone of its capture and compression in the wedge-shaped space between the pressing rollers and the die, as well as in the zone of extrusion through the die of the matrix, which reduces the performance of the press granulator.

A granulator press is also known, in which the matrix is made in the form of a perforated ring with internal flanges, and the side surfaces of the flanges facing the pressing roller are inclined, which increases the extrusion resistance of the pressed material in the gap between the matrix flanges and the ends of the pressing roller [USSR Author's Certificate No. 638487, cl. B30B 11/20, published December 25, 78, Bulletin No. 47].

However, this design does not significantly reduce the lateral extrusion of the pressed material, as well as improve its gripping conditions due to the limited height of the flanges, determined by the layout conditions of the press granulator, and the inability to quickly adjust for the same matrix the height of the flanges and the gap between their side surfaces and ends of the pressing rollers.

The technical result of the invention is to improve the gripping conditions of the pressed material and reduce its extrusion in the direction of the ends of the working bodies, thereby increasing the productivity of the press granulator.

The claimed technical result is achieved by the fact that in a press granulator containing an active ring matrix mounted on the face plate with an inner cylindrical surface perforated with through dies, passive pressing rollers mounted on it and a cone mounted on the matrix for feeding the pressed material into the zone interchangeable rings, removable restrictive rings are attached to the faceplate and cone so that their side surfaces facing the ends of the pressing rollers and the contact Rui with compressible material and the inner cylindrical surface of the matrix to form an annular cavity inside it with incoming press rolls. Bounding rings are mounted with the possibility of axial movement and subsequent fixation in a predetermined position. The surfaces of the restrictive rings in contact with the pressed material have a cycloidal shape in diametric section, and they are formed by the convex side of an ordinary cycloid with a starting point lying on a circle defined by the inner radius of the restrictive rings.

Figure 1 shows an axial section of a press granulator; figure 2 is a view of figure 1; figure 3 - replaceable restrictive ring; figure 4 is a section bB in figure 3 of the restrictive ring with a cycloidal shape of the side surface; figure 5 is a view In figure 3; in Fig.6 is a view of G in Fig.3.

The granulator press contains an annular matrix 2 mounted on the faceplate 1 and pressing rollers 3 located inside it, which are mounted on a carrier formed by a flange 4, a plate 5 and an axis 6. A cone 7 is fixed on the matrix 2 to supply material to the pressing zone. Replaceable restrictive rings 8 are attached to the faceplate 1 and cone 7 with the possibility of their axial movement along the keys 9, which exclude the rotation of the rings 8 relative to the mating parts. The restriction rings 8 partially enter the matrix 2 to ensure a predetermined clearance Δ between their side surfaces 10 and the ends of the press rollers 3. The axial fixation of the restriction rings 8 is carried out through the elongated holes in them using bolts 11 with washers 12. Supporting surfaces for washers 12 and the bolt heads 11 are made on the restrictive rings 8 in the form of flat flats 13 with corrugation. The faces of the washers 12 adjacent to the flats 13 are also made with corrugation. In conjunction of the restrictive rings 8 with the inner surface of the matrix 2, landing with a gap is provided.

The lateral surfaces 10 of the restrictive rings 8, facing the ends of the pressing rollers 3 and in contact with the pressed material, are formed in diametric section by the convex side of an ordinary cycloid with an initial point M lying on a circle defined by the inner radius R of the restrictive rings 8.

The MN cycloid site is described by the following parametric equations:

x = r · (φ-sinφ),

y = r · (1-cosφ),

where r is the radius of the generating circle;

φ is the angle of rotation of the generating circle.

The radius r of the generating circle is determined from the expression

,

,

where h is the height of the side surfaces 10 of the restrictive rings 8;

b is the thickness of the cycloidal section of the side surfaces 10 of the restrictive rings 8;

φ _N is the angle of rotation of the generating circle corresponding to point N.

The ratio of h and b satisfies the condition

.

.

The operation of the press granulator is as follows. The press drive through the faceplate 1 transmits rotation to the matrix 2, which rotates the compression rollers 3 through friction forces. The pressed material fed through the cone 7 to the inner surface of the matrix 2 is subjected to shear stresses from the contact surfaces of the matrix 2, the pressing rollers 3 and the contact surfaces 10 of interchangeable restrictive rings 8 is carried away into the wedge-shaped space bounded by these surfaces, where the pressed material is compressed and pressed out into the forming channels of the matrix 2 in the form of granules. Additional contact surfaces 10 contribute to an increase in the circumferential extent of the contact area of the pressed material with the working bodies, which allows to optimize the capture conditions of the layer of the pressed material. In addition, during compression, part of the pressed material moves in the direction of the ends of the working bodies. Rings 8 limit the end surfaces of the layer of pressed material and prevent its lateral extrusion. The clearance Δ between the surfaces 10 and the ends of the pressing rollers 3 is regulated by moving the restrictive rings 8 over the keys 9 and then fixing them in a predetermined position by the bolts 11. The clearance Δ can be adjusted, in particular, when the contact surfaces 10 of the restrictive rings are worn 8. Some of the pressed material enters into the gap Δ and squeezed out through it. The implementation of the side surfaces 10 of the restrictive rings 8 along the cycloid allows you to create a narrowing gap Δ of optimal shape and thereby increase the resistance to extrusion of the pressed material.

Thus, in the proposed invention, the conditions for the capture of the pressed material are improved, and its extrusion towards the ends of the working bodies is significantly reduced, as a result of which the productivity of the press granulator increases.

Claims (3)

1. Press granulator, containing an active ring matrix mounted on the face plate with an inner cylindrical surface perforated with through dies, passive pressing rollers located on it and mounted on a carrier, and a cone fixed to the matrix for feeding the pressed material into the pressing zone, characterized in that replaceable restrictive rings are attached to the faceplate and cone, and their lateral surfaces facing the ends of the pressing rollers form a ma Ritsa annular cavity entering into the press rolls it. 2. Press granulator according to claim 1, characterized in that the restrictive rings are mounted with the possibility of axial movement and subsequent fixation in a given position. 3. The granulator press according to claim 1, characterized in that the surfaces of the restrictive rings that are in contact with the pressed material have a cycloidal shape in diameter and are formed by the convex side of an ordinary cycloid with a starting point lying on a circle defined by the internal radius of the restriction rings.

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