EP4098365A1 - Rouleau à segments, en particulier destiné au broyage ou au compactage de produit en vrac - Google Patents

Rouleau à segments, en particulier destiné au broyage ou au compactage de produit en vrac Download PDF

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Publication number
EP4098365A1
EP4098365A1 EP22175109.2A EP22175109A EP4098365A1 EP 4098365 A1 EP4098365 A1 EP 4098365A1 EP 22175109 A EP22175109 A EP 22175109A EP 4098365 A1 EP4098365 A1 EP 4098365A1
Authority
EP
European Patent Office
Prior art keywords
segments
segment
roller
roller shaft
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22175109.2A
Other languages
German (de)
English (en)
Inventor
Andreas Eichler
Marko Schmidt
Marcus Meinel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takraf GmbH
Original Assignee
MAN Takraf Fordertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Takraf Fordertechnik GmbH filed Critical MAN Takraf Fordertechnik GmbH
Publication of EP4098365A1 publication Critical patent/EP4098365A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/005—Roll constructions

Definitions

  • the invention relates to a new construction of rollers which consist of segments, in particular for crushing or compacting bulk material.
  • the segmented roller is formed from a roller shaft and a roller shell.
  • the segmented roller preferably has a one-piece roller shaft.
  • the roll core can be separate or an integral part of the roll shaft or roll shell.
  • the roll shell is made up of segments.
  • Solid rolls can be manufactured as composite casting to achieve the required wear resistance. However, they usually consist of a forged part whose surface is protected by build-up welding or grid armor (hard metal pins with a material bed formed in between as autogenous wear protection). Nevertheless, due to the low material utilization, solid rollers are usually only used in the cement industry, where high pressing pressures but only low wear rates (e.g. 0.1-1.0g/t) are to be expected. The use of roller presses in the ore industry, where significantly higher wear rates of e.g. 3-10g/t occur despite lower pressing pressures, only became possible with the use of compound rollers.
  • bandage rollers in which the roller shell is unsegmented ("bandage") and the forged part (with grid armoring by hard metal pins, sintered wear plates or build-up welding) or cast part (chilled cast iron or compound cast iron) is designed.
  • DE°39°27°884°A1 discloses a segmented roller with complementary projections and recesses in the adjacent radially arranged segments and their entire body and surface, which result in radial toothing. These are clamped together and on the roller shaft with clamping elements via clamping screws and tie rods, which run axially through the roller shaft. In addition, there are those arranged axially in the roller shaft.
  • the disadvantage here is that the roller must be removed or must have recesses in the housing wall of the roller crusher, which allow dismantling in the installed state. The manufacturing accuracies required to manufacture the segments and the roller shaft are considerable, so that the feather keys correspond to the grooves of the roller shaft and segments.
  • DE°197°09°263°A1 represents a further development of this document and does not have any keys or keyways, but instead reduces the projections and recesses from the roller surface to the roller shaft and supplements them with axial rows of teeth.
  • the accuracies for producing the receptacles for the tie rods, the protruding shoulders for the U-shaped clamping elements of the tie rods and the production of the shoulders and recesses of the segments relative to one another are complex and therefore expensive.
  • the grinding roller in DE 3 915 320 A1 is also designed without keys and keyways and instead has sawtooth-shaped recesses on the roller body.
  • the segments of the roller shell are attached to the roller body by means of fastening flanges or clamped to the roller body by means of axial clamping screws and clamping plate segments.
  • DE°43°44°206°A1 shows clamping rings which are arranged axially on both sides of the segments in order to connect and arrange several segments axially with one another via tie rods that are passed through axially. Furthermore, keyways are provided in the roller body or roller shaft to fix the segments radially.
  • a disadvantage here is the manufacturing accuracy required, so that the segments correspond radially to the feather keys and the feather key grooves and axially to the shoulder surfaces as a receptacle for the clamping rings and the tie rods guided thereby.
  • DE°197°36°087°A1 claims a roller shaft of the dovetail keys that are arranged axially on this.
  • the associated segments have undercut dovetail guide surfaces, which are arranged on the roll shaft in a wedge shape at an angle to the roll axis and have their maxima between two segments.
  • the at least two segments each have at least one dovetail guide surface wedge are bolted and braced against each other on the wedge using expansion bolts.
  • a disadvantage here is the manufacturing effort for the production of the dovetail pairing in the form of a double wedge.
  • the segments can only be dismantled with difficulty or not at all with the roller installed, because the expansion bolts run through all the segments and the segments have to be pulled down axially.
  • the segments are connected to the roller shaft with intermediate elements.
  • the intermediate elements in turn, have white keyways that run axially and correspond to the roller shaft.
  • the intermediate elements are screwed onto the roller shaft and the segments onto the intermediate elements.
  • a disadvantage is the use of the intermediate elements with the feather keys and the feather key grooves opposite the roller shaft, which makes the construction complex and expensive. Added to this is the expense of the many bores and screw connections on the circumference of the roller shaft for securing the position of the intermediate elements, as well as their positioning against one another for inserting the screws. It is almost impossible to assemble the segments once they have been installed because the screws have to reach far into the segments and intermediate elements in the axial direction. The positioning of the segment bores over those of the intermediate elements appears to be just as difficult.
  • the object of the present invention is therefore to overcome the disadvantage in the prior art.
  • the individual steps of the method are listed in a simplified manner, whereby the segments can be placed, for example, by attaching the segments to a hoist or by using assembly handles that then enable people to move them.
  • the positioning takes place as a smooth transition from the setting down of the segment over the roll core as a further step.
  • Positioning aids such as fitting screws/sleeves are possible for optimal alignment of the segment on the roller core, or alignment is carried out flush with the assembly collar.
  • a mounting collar is understood to be a shoulder that rests on the roller core and preferably runs completely around it. For this purpose, for example, the roller core is fixed and aligned under the respective segment by turning.
  • assembly means are arranged, for example fixing the segments relative to the roll core by means of screws. Then the other segments according to the previous steps appropriate.
  • the respective clamping elements are inserted radially. For example, a circumferential groove or several between two or more segments can be provided.
  • These clamping elements are preferably clamping sets, which produce a clamping of the segments relative to one another and relative to the roller shaft. This bracing results in a positive and non-positive connection. This combination is considered to be very efficient.
  • the clamping elements are slightly braced, then the position of the segments is checked, starting from a correct position, no further steps are to be taken and the assembly means are removed. This is followed by the final bracing of the segments and, if necessary, a final check of the position.
  • the process of disassembling segments of the segment roll begins with placing mounting means on them. This secures the segments against the roller core during disassembly. This is followed by the loosening of the clamping elements, so that the clamping of the segments is released and the segments can be removed. Thanks to the mounting means, the segments remain in their position on the roller core. The tension existed between the segments among themselves and between the individual segments in relation to the roller core. After loosening the assembly means, they can be placed on the roll stub, for example, or removed from it. This is possible because the clamping elements are arranged radially on the end faces and their space requirement when removing them from the roll is small, which means that the roll does not have to be removed.
  • eyelets for attachment or Attach assembly handles to the segment to be removed.
  • the roller Before removing a segment, the roller should be positioned in such a way that it can be removed from the crusher or mill, for example, up or down. After that, the roller should preferably be secured in its position so that the respective segment can be safely removed after the assembly means have been loosened and removed. In this way, all segments located on the roll core can be removed from it or, if necessary, a single one.
  • a segmented roller in particular for crushing or compacting bulk material, comprising at least one roller shaft, at least two segments and at least one radially arranged clamping element, the roller shaft being designed as an n-corner, in particular as a convex and/or regular n-corner, each multiple bearing segment bearing on the roller shaft and wherein the bearing surfaces form at least one common corner/transition of the roller shaft and bear on said surfaces.
  • clamping elements are understood to mean those that have at least one conical surface and/or those that are designed to enable a non-positive shaft-hub connection, which can also be designed as a clamping set.
  • the roller shaft designed as an n-corner preferably has an n-cornered cross-section that runs continuously in the axial direction.
  • the bearing surfaces formed in this way are distributed n times rotationally symmetrically over the circumference of the shaft.
  • the bearing surfaces preferably do not have any constructive elements such as keyways, dovetails or the like.
  • a form fit between the roller shaft of the segmented roller can be achieved by multiple support across the corner with the at least two segments, this multiple support preferably being a triple support and the support surfaces following one another in the circumference.
  • multiple support is understood to mean that at least two segments, preferably several segments, are arranged on the roll core and rest there on several support surfaces.
  • the multiple support of the segments on the roller shaft is a double support, this double support resulting from at least two adjacent surfaces.
  • the double support is characterized by adjacent surfaces, which are usually at 90 degrees to each other, which results in a superimposed positive connection for a higher-strength shaft-hub connection in addition to the frictional connection via the clamping elements.
  • the at least one tensioning element lies radially in at least one groove on the end faces of the segments.
  • the grooves can be provided in a circular manner in an end face, in which case the number of these grooves can vary; one groove is preferred.
  • Other arrangements of the grooves can also be implemented, such as pitch circles between individual segments, with these pitch circles preferably overlapping one another so that closed prestressing towards the roll core is possible.
  • Grooves arranged on both sides in the segments, which are arranged symmetrically on the end faces, are particularly preferred.
  • the segments have an assembly means on at least one end face, whereby this can enclose the shape of the roller shaft, whereby this form can also be interrupted.
  • the mounting means can be designed, for example, as screws that are carried by a mounting flange or mounting ring, without being limited to them.
  • the assembly means are preferably provided in one piece and circumferentially on the respective segment. Designs deviating from this are conceivable, such as perforated, multi-part assembly means or assembly rings.
  • the assembly means rest on the roll core or are just spaced from it. They are used for easy assembly/disassembly of the segments on the roller core.
  • the assembly means are detachably or non-detachably connected to the respective segment.
  • assembly means on the segments preferably designed as assembly flanges, are detachably connected to it, preferably screwed on. They can also be non-detachably connected, for example welded or forged.
  • the assembly means of the segmented roller have openings for the detachable arrangement of the segments on the roller shaft.
  • the segment is connected to the shaft via screws during assembly/disassembly and thereby secured.
  • the segments have variable dimensions and material thicknesses, being made from different materials and combinations of materials.
  • These materials are preferably metallic, such as cast or forged materials, and particularly preferably steels and their alloys.
  • composite materials and sintered materials are understood as a combination of materials, without being limited to these.
  • this is designed integrally from roller shaft and roller core.
  • this roll shaft has connections and roll cores, which are integral parts of the roll shaft.
  • the components are partially designed integrally and, for example, the roller core is shrunk onto the shaft with the connections.
  • a further aspect of the invention relates to the use of a method according to the invention for assembling and/or dismantling a segmented roller according to the invention.
  • the claimed method and/or the segmented roller prevent the washing out of screw bores in the case of radial attachment, because this can advantageously be dispensed with: If the segments are screwed radially to the base body, disassembly is possible without removing the rollers. However, due to the high pressing pressures, the counterbores are washed out. If the segments are only screwed to the edge of the roll, this in turn leads to an insufficient support of the segments.
  • FIG 1 shows a schematic representation of an embodiment of a roller shaft 1 according to the invention, in which the roller shaft and roller core are designed integrally.
  • the bearing surfaces of the roller shaft 10 can be seen here, on the outer areas of which the receptacles for the assembly means 11 are provided. Between the bearing surfaces are chamfers 12 arranged.
  • the roller shaft has connections 13 and roller core 14 , these being integral parts of the roller shaft.
  • the design of the roller shaft 1 shown here is suitable for receiving or forming the jacket over two as well as over four segments.
  • figure 2 shows a schematic representation of a segment 2 according to the invention, here in the embodiment as a half-shell in the outside view. Shown are the bearing surfaces of segment 20, the bushings for assembly means 21, as well as a groove, here provided circumferentially, and the segment working surface 22. Segment 2 has two assembly means bushings 21 on each end face, with which this is secured on the roller shaft during the assembly/disassembly. The provided groove 5 serves to accommodate the clamping element(s).
  • the design as a half shell, i.e. two segments on the roller shaft, is the minimum dimension for radial disassembly - but it can also be significantly more (e.g. four segments, see example in figure 4 ).
  • the segment can be designed as a one-piece solid segment (e.g. chilled cast iron) or a multi-piece composite segment (with sintered wear plates, grid armor or build-up welding on the segment surface).
  • the gap between adjacent segments must be dimensioned in such a way that material can settle there and thus achieve autogenous protection against wear and cannot flow away laterally, so that washing out in the gap area is prevented.
  • figure 3 shows a schematic representation of an embodiment of a segment 2 according to the invention, here as a half-shell in the inside view.
  • the bearing surfaces of the segment 20 can be clearly seen; in the case of half-shells, these are one full bearing surface and two half bearing surfaces.
  • a groove 5 can be seen on each end face. These are used to hold clamping elements.
  • the passages for the assembly means 21 can be seen, these are arranged twice on each end face.
  • figure 4 shows a schematic representation of an embodiment of a segment 2 according to the invention, which can be seen here as a quarter shell in the outside view.
  • a segment 2 according to the invention, which can be seen here as a quarter shell in the outside view.
  • four segments are required on the circumference of the roll.
  • a groove 5 is provided on each end face in this segment.
  • Bearing surfaces 20 are each provided with a passage for mounting means 21 .
  • the freely configurable work area of segment 22 is also shown here.
  • figure 5 shows a schematic representation of an embodiment of a segment 2 according to the invention, which can be seen here as a quarter shell in the view from the inside.
  • the two grooves 5 are also shown here, as are the four passages for assembly means 21. These are provided once in each bearing surface 20 and end face.
  • FIG 6 shows a schematic representation of an embodiment of a segment roller according to the invention, this is shown here in section and in a perspective view.
  • the figure shows the roller shaft 1, which is shown with hatching.
  • a bearing 3 is arranged on the outer ends, with which the segment roller is supported and guided in a housing.
  • This segment 2 has a radially circumferential groove 5 on each end face. In this groove 5 , a clamping element 6 is used and biased.
  • the clamping element 6 is shown with hatching because it is designed to run all the way around and was therefore sectioned in the view.
  • FIG 7 shows a schematic representation of an embodiment of a segment roller according to the invention, the segments 2 shown are half-shells in an exploded view of a segment roller.
  • the roller shaft 1 is shown from the inside to the outside, on which two segments 2 with corresponding assembly means 4 are provided.
  • the clamping elements 6 are shown axially outwards next to the segments 2. When installed, these are arranged in the grooves 5 and brace the segments 2 against one another and against the roller shaft 1.
  • the bearings 3 are axially connected to the clamping elements 6 .
  • figure 8 shows a schematic representation of an embodiment of a segment roller according to the invention, with half-shells in an isometric view. This should make it clear how the segments 2 are arranged assembled with the clamping elements 6 on the roller shaft 1 with the corresponding bearings 3 .
  • the tensioning elements 6 generate a force when they are pretensioned, which tensions the segments 2 against the roller shaft 1 .
  • FIG 9 shows a schematic representation of an embodiment of a segment roll according to the invention, with quarter shells in an exploded view.
  • the four segments 2 all have a groove 5 on each face which serves to accommodate the clamping elements 6 .
  • the contact surfaces on the roller shaft 1 have the passage or receptacle for the assembly means 4 on the end faces.
  • the clamping elements 6 are arranged with which these braced against each other and the roller shaft 1 .
  • the bearings 3 are shown, which guide the segmented roller in a housing, not shown here.
  • FIG 10 shows a schematic representation of an embodiment of a segment roller according to the invention, here with quarter shells in an isometric view.
  • the four segments 2 on the roller shaft 1 are shown, which are braced on this by means of the clamping elements 6 .
  • the bearings 3 are shown, which are used for storage in a housing.
  • the embodiment shown here shows the mounting means and the clamping elements 6 in the installed state. This is only intended for assembly or disassembly. In use, the mounting means are preferably removed again, which means that their position can be saved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP22175109.2A 2021-06-03 2022-05-24 Rouleau à segments, en particulier destiné au broyage ou au compactage de produit en vrac Pending EP4098365A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021114404.3A DE102021114404B4 (de) 2021-06-03 2021-06-03 Segmentwalze, insbesondere zur Zerkleinerung oder Kompaktierung von Schüttgut

Publications (1)

Publication Number Publication Date
EP4098365A1 true EP4098365A1 (fr) 2022-12-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22175109.2A Pending EP4098365A1 (fr) 2021-06-03 2022-05-24 Rouleau à segments, en particulier destiné au broyage ou au compactage de produit en vrac

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Country Link
US (1) US20220388264A1 (fr)
EP (1) EP4098365A1 (fr)
DE (1) DE102021114404B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022001978A1 (de) 2022-06-08 2023-12-14 ALLRECO GmbH Drehvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565842A (en) * 1922-04-04 1925-12-15 Westinghouse Electric & Mfg Co Grinder roll
DE3915320A1 (de) 1989-05-10 1990-11-15 Krupp Polysius Ag Mahlwalze
DE3927884A1 (de) * 1989-08-23 1991-02-28 Krupp Polysius Ag Maschine zur kompaktierung und/oder zerkleinerung von schuettgut
DE19709263A1 (de) * 1997-03-06 1998-09-10 Krupp Polysius Ag Walze
JP2007061731A (ja) * 2005-08-31 2007-03-15 Aktio Corp 湿式破砕機
CN101428244A (zh) * 2008-12-19 2009-05-13 吴兆忠 组装单辊制砂机装置
CN108686752B (zh) * 2018-05-23 2020-12-08 中国水利水电第十工程局有限公司 压力可控式破碎机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1798000A (en) * 1926-12-08 1931-03-24 American Eng Co Ltd Rotary crusher
US2269552A (en) * 1939-08-07 1942-01-13 American Brake Shoe & Foundry Segmental crushing roll
DE4344206A1 (de) 1993-12-23 1995-06-29 Kloeckner Humboldt Deutz Ag Zweiwalzenmaschine für die Druckbehandlung von Schüttgütern
DE19736087A1 (de) 1997-08-20 1999-02-25 Kloeckner Humboldt Wedag Walze für eine Hochdruck-Walzenpresse insbesondere zur Gutbettzerkleinerung körnigen Gutes
DE102007032261A1 (de) 2007-07-11 2009-01-15 Khd Humboldt Wedag Gmbh Walze für eine Hochdruckwalzenpresse insbesondere zur Gutbettzerkleinerung körnigen Gutes
US8517181B1 (en) * 2011-03-23 2013-08-27 Cp Manufacturing, Inc. Multi-disc assembly for disc screen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565842A (en) * 1922-04-04 1925-12-15 Westinghouse Electric & Mfg Co Grinder roll
DE3915320A1 (de) 1989-05-10 1990-11-15 Krupp Polysius Ag Mahlwalze
DE3927884A1 (de) * 1989-08-23 1991-02-28 Krupp Polysius Ag Maschine zur kompaktierung und/oder zerkleinerung von schuettgut
DE19709263A1 (de) * 1997-03-06 1998-09-10 Krupp Polysius Ag Walze
JP2007061731A (ja) * 2005-08-31 2007-03-15 Aktio Corp 湿式破砕機
CN101428244A (zh) * 2008-12-19 2009-05-13 吴兆忠 组装单辊制砂机装置
CN108686752B (zh) * 2018-05-23 2020-12-08 中国水利水电第十工程局有限公司 压力可控式破碎机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022001978A1 (de) 2022-06-08 2023-12-14 ALLRECO GmbH Drehvorrichtung

Also Published As

Publication number Publication date
DE102021114404A1 (de) 2022-12-08
US20220388264A1 (en) 2022-12-08
DE102021114404B4 (de) 2024-07-04

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