Press roll

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 and have first clamping surfaces (8). The segments (2) are releasably fastened at each front face to the roller core (1) by means of at least one fastening ring (6), said fastening ring fitting over the clamping shoulders (5) of the segments (2). The front faces (12) and/or clamping shoulders (5) of the segments (2), in the front face edge regions associated with the lateral faces (3), have outer material reinforcements (13) which protrude outwardly relative to the first clamping surface (8) in the radial direction and/or relative to the front face (12) in the axial direction and define, together with the clamping surfaces (8), pocket-type recesses (14) in between them in the circumferential direction, second clamping surfaces (9) of the fastening ring (6) resting against said pocket-type recesses.

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 to an outer surface of the roller core and formed by a plurality of angularly distributed segments with mutually angularly confronting side faces, the segments each having an axial end face and, projecting axially therefrom, an angularly extending clamping shoulder formed with a respective first clamping face, a fastening ring detachably securing the segments to the roller core, formed at each of the segments with a respective second clamping face, and engaging over the clamping shoulders of the segments with the second clamping faces bearing radially and axially on the first clamping faces of the segments, and two respective angularly spaced outer material reinforcements on each of the end faces of the segments adjacent the side faces, the material reinforcements projecting radially outward from the respective first clamping faces and axially from the respective end faces, the segments each being formed in the respective shoulder with a respective pocket angularly between the respective reinforcements and the respective side faces and formed with the first clamping faces of the respective shoulder.

2. The press roller defined in claim 1, wherein the fastening ring is shrunk onto the segments or their clamping shoulders.

3. The press roller defined in claim 1, further comprising: axially extending clamping bolts pressing the fastening ring against the segments.

4. The press roller defined in claim 1, wherein the first clamping faces or the second clamping faces are aligned at an acute angle to a roller axis in order to generate a radial clamping force, during tightening of the axially extending clamping bolts or during shrinking.

5. The press roller defined in claim 1, wherein the fastening ring has several clamping projections each associated with a respective one of the segments, distributed over the periphery having the first clamping faces, and extending over only a portion of the arc length of each respective segment and engaging in the pockets of the segments.

6. The press roller defined in claim 1, wherein the segments each have at least one axially extending throughgoing hole for the clamping bolts that is centered angularly between the two side faces.

7. The press roller defined in claim 6, wherein the material reinforcements are provided on both sides of the throughgoing hole, so that the throughgoing hole is between the material reinforcements and in the region of the pocket.

8. The press roller defined in claim 1, wherein the fastening ring has an axially inwardly projecting clamping collar formed with radially inwardly directed clamping projections formed in turn with the second clamping faces and engaging radially into the pockets of the clamping shoulders of the segments to press the second clamping faces against the respective first clamping faces of the clamping shoulders of the segments.

9. The press roller defined in claim 8, wherein the clamping projections are on the clamping collar and project radially inward from the clamping collar and project axially inwardly from the fastening ring or a base of the fastening ring.

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 fastened to the roller core 1 that is formed by several segments 2 distributed over the periphery, these segments 2 having axially extending side faces 3. The segments 2 each have a profiled outer surface; here embodiment, they have mold cavities 4 for briquetting or compacting. These shaping tools/mold cavities 4 are unitarily formed in each segment 2. Each segment 2 has a clamping shoulder 5 on each 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 both 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 during 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 periphery (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 tightening of the segments 2 by the fastening ring 6 and the clamping bolt 7. Each fastening ring 6 is profiled in cross section. It has a circumferential base 6a on the one hand and a circumferential clamping collar 6b on the other hand, so that it of substantially L-shaped cross 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 as bores, and they extend through the entire axial length of the respective segments 2, so that the clamping bolts 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 the entire periphery, but rather the clamping ring 6 has locally limited clamping projections 11. The clamping ring 6 thus has several clamping projections 11, each associated with a segment 2, distributed over the periphery, 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 arc length of a segment 2, so that the force input from the clamping ring 6 does not occur over the full periphery (or over the entire surface), but only in a locally limited manner in the region of 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 outwardly relative to the first clamping face 8 radially and relative to the end face 12 axially, so that a pocket is respectively 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 in the front end face of the segments 2 at with the side faces and thus do not impair the trouble-free bracing. They provide an increase in stability in regions of the segments that are subjected to especially high loads. The clamping ring 6 is thus embodied a sort of crown. The second clamping face 9 are each on a radial inner side of a rap 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 is extending at an acute angle in the pockets 14 relative to the roller axis.

(12) Moreover, the drawing shows that two segments angularly one after the other engage in each other. For this purpose, 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 corresponding 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 corresponding 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 at their edges at the ends, 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.

(13) In the figures, an embodiment is shown in which the fastening ring 6 is braced by clamping bolts 7 against the segments 2. However, the invention also includes embodiments in which the fastening ring is shrunk onto the segments or their clamping shoulders. This is not shown in the figures.