Press roller

Abstract

The invention relates to a press roller for a roller press, in particular for briquetting, compacting or grinding granular material, having a roller core (1) and a roller sleeve fastened to the exterior of the roller core (1), said sleeve being composed of a plurality of segments (2), distributed over the circumference, with mutually facing lateral faces (3). The segments (2) have clamping shoulders (5) which extend around the front faces, the segments (2) being releasably fastened at each front face to the roller core (1) by means of at least one fastening ring (6). Said fastening ring fits over the clamping shoulders (5) of the segments (2). The fastening ring (6) is or can be clamped against the segments (2) by means of axially parallel clamping bolts (7). Each segment has at least one axially parallel opening for the clamping bolts which, relative to the extension in the circumferential direction, is arranged between the two lateral faces (3) of the segment (2).

Claims

1. A press roller for a roller press for briquetting, compacting or grinding granular material, the roller comprising: a roller core defining and centered on an axis; a roller sleeve secured on an outer surface of the roller core, having axial ends, and formed by a plurality of angularly distributed segments with mutually angularly confronting side faces, the segments each formed with a clamping shoulder, an axially extending throughgoing hole between and offset from the respective side faces, and an axially open pocket spaced between the respective side faces and forming a generally radially outwardly directed first clamping face extending at an acute angle to the roller axis; respective completely annular fastening rings detachably securing the segments at each axial end to the roller core and engaging over the clamping shoulders of the segments, the rings each having an annular array of respective angularly spaced axial projections each at a respective one of the segments, each fittable in the pocket of the respective segment, and each having a generally radially inwardly directed second clamping face engageable with a respective one of the first clamping faces; and respective clamping bolts axially bracing the fastening rings against the segments and each extending axially through a respective one of holes such that tightening of the bolts presses the second clamping faces against the first clamping faces and presses the respective rings axially and radially inwardly against the segments.

2. The press roller defined in claim 1, wherein the fastening ring has a clamping collar engaging over the clamping shoulder of the segments with the second clamping faces that is braced with the clamping bolts against complementary first clamping faces of the clamping shoulders of the segments.

3. The press roller defined in claim 1, wherein the segments have outer material reinforcements on their end faces or clamping shoulders in end-face edge regions near the side faces that project radially outward from the first clamping face or axially outward from the end face and form pockets with the first clamping faces angularly therebetween against which the second clamping faces of the fastening ring bear.

4. The press roller defined in claim 1, wherein the throughgoing hole of each segment is angularly centered between the respective side faces.

5. The press roller defined in claim 1, wherein the fastening rings on the opposite end faces of the roller are both braced against each other by the axial clamping bolts that engage completely through the segments.

6. The press roller defined in claim 1, wherein one side face of each segment has a projection and the other side face of each segment has a complementary recess, the projection of one segment engaging in the complementary recess of the following segment.

7. The press roller defined in claim 6, wherein the side faces are flat and stepless over the entire radial thickness of the segment in the side face edge regions near front sides to both sides of the projection or of the recess.

8. The press roller defined in claim 1, wherein the segments have first clamping faces extending over their entire angular length and/or the clamping ring has a second clamping face along its entire angular length.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The invention is described in further detail below with reference a figure illustrating only one embodiment.

(2) FIG. 1 is a schematic simplified perspective view of a press roller,

(3) FIG. 2 is a perspective section of the roller according to FIG. 1,

(4) FIG. 3 is a side view of the roller as in FIG. 2,

(5) FIG. 4 is a perspective view of the press roller according to FIG. 1, and

(6) FIG. 5 is a front view of the roller as in FIG. 4.

SPECIFIC DESCRIPTION OF THE INVENTION

(7) FIG. 1 shows a press roller for a roller press, particularly for briquetting or compacting and especially preferably for hot briquetting or hot compacting granular material. Basically, such a press roller consists of a roller core 1 and a roller sleeve secured to the roller core 1 that is formed by a plurality of segments 2 distributed over the outer surface, these segments 2 having axially extending side faces 3. The segments 2 each have a profiled outer surface; here, they have cavities 4 for briquetting or compacting. These shaping tools/cavities 4 are unitarily formed in each segment 2. Each segment 2 has a clamping shoulder 5 on each axial end.

(8) The fastening of the segments 2 on the roller core 1 is done with two fastening rings 6 that are also referred to as clamping collars or clamping rings. They are shown in FIG. 2. The two fastening rings 6 are placed at the ends, so that they engage over the clamping shoulders 5 of the segments 2. The two fastening rings 6 are secured by axially extending clamping bolts 7 against the ends of the segments 2 they axially flank. The clamping shoulders 5 have first clamping faces 8, and the clamping ring 6 has second clamping faces 9. In order to enable the generation of radial force when the axially extending clamping bolts 7 are tightened, the first clamping face 8 and the second clamping face 9 extend at an acute angle to the roller axis. The axial or axially extending clamping force applied by the clamping bolts 7 is consequently amplified and converted into a radially inward clamping force, thus ensuring solid fastening of the segments 2 on the roller core 1. A positive connection can also be provided between the segments 2 and the roller core 1, for example by having positively interfitting formations of the segments 2 on the inner surface (or lower side) engage in complementary formations of the roller core 1 on the outer surface (and/or vice versa). In any case, special importance is given in the illustrated embodiment to clamping the segments 2 by the fastening ring 6 and the clamping bolts 7. Each fastening ring 6 is profiled in cross section. It has an angularly extending base 6a on the one hand and an angularly extending clamping collar 6b on the other hand, so that it is of substantially L-section. This circumferential clamping collar 6b engages with the second clamping faces 9 over the clamping shoulders 5 of the segments 2, so that the second clamping faces 9 of the clamping ring 6 are pressed radially inward against the first clamping faces 8 of the clamping shoulders 5.

(9) The segments 2 each have an axially extending and throughgoing hole 10 through which the clamping bolts 7 extend. These axially throughgoing holes 10 are each angularly between the two side faces 3 of a segment 2. In this embodiment, the hole 10 of a segment 2 is angularly centered between the two side faces 3 of the respective segment. The throughgoing holes 10 are bores, and they extend through the entire axial length of the respective segments 2, so they engage completely through the segments. In this way, the two fastening rings 6 can be braced on both sides of the segments with each other under interposition of the segments 2.

(10) Here, the clamping ring 6 does not have a uniform cross section over all of its circumference, but rather the clamping ring 6 has locally limited clamping projections 11. The clamping ring 6 thus has a plurality of clamping projections 11, each associated with a segment 2, distributed over the outer surface, each of these clamping projections 11 forms a respective one of the second clamping faces 9. The clamping projections 11 thus extend over only a portion of the angular length of a segment 2, so that the force input from the clamping ring 6 does not occur over the full outer surface or over the entire surface, but only in a locally limited manner near the clamping projections 11.

(11) The segments 2 have outer material reinforcements 13 on their end faces 12 and their clamping shoulders 5 (or in the transition region between end face 12 and clamping shoulder 5). These material reinforcements 13 project outward relative to the first clamping face 8 radially and axially relative to the end face 12, so that a respective pocket 14 is provided angularly between two material reinforcements 13 of a segment 2. The first clamping faces 8 of the segments 2 fit in these pockets 14, i.e. the clamping ring 6 engages with its locally limited clamping projections 11 into these pockets 14 of the segments. The material reinforcements 13 that are on the end faces of the segments 2 at the side faces thus do not impair trouble free bracing. They provide increased stability in regions of the segments that are subjected to especially high loads. The clamping ring 6 is thus formed as a sort of crown. The second clamping faces 9 are each on a radial inner side of a respective one of the locally limited clamping projections 11, this second clamping face 9 as well as the first clamping face 8 of the segments 2 can extend in the pockets 14 at an acute angle to the roller axis.

(12) Moreover, the drawing shows that two segments angularly one after the other engage in each other. To this end, one side face 3 of a segment 2 has an angularly projecting nose 15 while the opposite side face 3 of the same segment 2 has a complementary angularly open pocket 16 so that the nose 16 of a segment engages in a manner similar to a tongue and groove connection into the complementary pocket 16 of the angularly adjacent segment. Apart from these elements (noses 15/pockets 16), the side faces 3 are flat or planar and thus stepless. In particular, profiling for the clamping bolts or clamping rods 7 can be omitted, since these clamping bolts are guided according to the invention through the central holes in the segment 2. In this way, the side faces 3, particularly near the end faces, namely on both sides of the noses and pockets over the entire radial thickness of the segment and radially above the noses/pockets, can be planar and thus stepless over the entire axial thickness of the segment. Notches and projections are thus avoided, which contributes to an increase in the strength and durability of the individual segments.