EP0804965B1 - Mahlbahn - Google Patents

Mahlbahn Download PDF

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Publication number
EP0804965B1
EP0804965B1 EP97201084A EP97201084A EP0804965B1 EP 0804965 B1 EP0804965 B1 EP 0804965B1 EP 97201084 A EP97201084 A EP 97201084A EP 97201084 A EP97201084 A EP 97201084A EP 0804965 B1 EP0804965 B1 EP 0804965B1
Authority
EP
European Patent Office
Prior art keywords
segments
track
sole
wear
wearing
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.)
Expired - Lifetime
Application number
EP97201084A
Other languages
English (en)
French (fr)
Other versions
EP0804965A1 (de
Inventor
Norbert Guerard
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.)
Magotteaux International SA
Original Assignee
Magotteaux International SA
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Filing date
Publication date
Application filed by Magotteaux International SA filed Critical Magotteaux International SA
Publication of EP0804965A1 publication Critical patent/EP0804965A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/003—Shape or construction of discs or rings

Definitions

  • the present invention relates to a track for shredders consisting of several segments supported by a rotary table and forming a double circular raceway running under rollers grinding to grind material spilled on the runway.
  • a grinder of the kind targeted by the present invention is, for example, described in document FR-A-2262476.
  • the slopes, as well those to simple raceway, like that shown in document BE-A-897937, than those with double raceway, are generally made up of separate neighborhoods or segments juxtaposed, which allows easier handling of these items of limited weight because it requires know that the total weight of an entire track can be of the order of a few tens of tonnes.
  • it can be replaced individually without need to replace the whole track.
  • grinder tracks The major problem with grinder tracks is wear. As a result of the abrasive nature of the material to be ground, the segments are, in fact, exposed to rapid and intense wear and must be made of cast iron very hard chrome. On the other hand, the segments must be machined very precise to be fixed correctly on the grinder table and protect this against any deterioration likely to occur during service. Since these requirements are not mutually compatible, the machining a chrome cast iron track is very difficult and very expensive.
  • the wear of the double track tracks is, moreover, irregular as the inner raceway wears more faster than the outer raceway.
  • Profile shapes the wear of the raceways are also different which results in differences in the grinding efficiency of a rolling relative to each other and reduces the efficiency of the mill.
  • it is the state of wear of the inner race which is crucial for the replacement of segments and it is often necessary to replace a track or segment while its region forming the outer raceway could still serve some time.
  • the purpose of the present invention is to provide a new track for shredders which overcomes these drawbacks, in particular provide a track with better resistance to wear and a track which exhibits more uniform wear.
  • the invention proposes a path for grinders of the kind described in the preamble which has the characteristics of claim 1.
  • the sole a steel easily machinable since the sole is not subject to wear grinding.
  • the sole can therefore be machined under optimal conditions to be fixed correctly on the rotary table which must remain in perfect state.
  • the wear segments can be fixed on the sole using screws and clamps.
  • edges of the sole may have bevelled parts forming dovetail fasteners with the wear segments.
  • the inner segments and the outer segments can be replaced separately and the outer segment, in particular, can stay in place until the raceway exterior is completely worn out. It is also possible to choose a harder material for the inner segments in order to ensure a uniform wear of the two raceways.
  • the invention offers the possibility of choosing different materials for each of the wear segments and to regularize the general wear profile by choosing a harder material where the track wears out the most and makes the wear profile more uniform, which has a great influence on the performance of the mill.
  • the track shown in Figure 1 and generally designated by the reference 10 is fixed on a rotary annular table not shown.
  • She has two annular raceways on its upper face concentric, of concave section, more precisely a raceway interior 12 and an exterior raceway 14 which evolve in underside of two pairs of grinding rollers not shown on the surface of convex bearing.
  • the two raceways 12 and 14 are defined in a series of internal wear segments 16 respectively a series of segments external wear 18, these segments being made of very resistant material to wear.
  • the different segments are fixed in housings defined in a sole 20 (see also figure 2) which can also be segmented and which is made in treated steel to obtain good mechanical properties and to be easily machinable.
  • the sole 20 has a flat base 22 with an edge inner 24 and an outer edge 26 delimiting with a rib protruding median 28 in an arc of a circle the locations of the segments wear 16 and 18.
  • the interior and exterior edges 24 and 26 preferably have inclined corners 30 respectively 32 cooperating with corresponding bevelled corners of segments 16 and 18 to define solid dovetail fasteners wear segments.
  • Wear segments may have, on their surface lower, cells 34 into which pins 36 penetrate through the sole 20 to ensure correct positioning of the segments when placing these and prevent any relative displacement of the wear segments relative to the sole, under the action of the engine torque transmitted by the sole and the segments to the bed of material to be ground and to the rollers.
  • segments 16 and 18 can be secured by screws 38 and clamps 40 in the middle region and by dovetail housing 30 and 32 on the periphery of the sole 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Rolling Contact Bearings (AREA)
  • Crushing And Grinding (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Golf Clubs (AREA)

Claims (5)

  1. Mahlbahn für Walzenmühlen welche von einer drehbaren Mahlschüssel getragen wird und zwei kreisrunde ringförmige Rollbahnen bildet welche unter Mahlwalzen ablaufen um das auf die Mahlbahn geschüttete Material zu zerkleinern, dadurch gekennzeichnet, dass die beiden Rollbahnen aus den Oberseiten einer Reihe innerer Verschleissegmente (16) und einer Reihe äusserer Verschleissegmente (18) bestehen, welche abnehmbar auf einer Tragsohle (20) aus bearbeitbarem Stahl befestigt sind welche eine mittlere bogenförmige vorstehende Rippe (28) und Aussen - (26) und Innenränder (24) aufweist die mit der Rippe (28) jeweilige ringförmige Lagerungen für die äusseren Segmente (18) und die inneren Segmente (16) bilden.
  2. Mahlbahn nach Anspruch 1, dadurch gekennzeichnet, dass die Verschleissegmente auf der Sohle (20) mittels Schrauben (38,42) und Keilen (40) befestigt sind.
  3. Mahlbahn nach Anspruch 1, dadurch gekennzeichnet, dass die Ränder der Sohle (20) abgeschrägte Teile (30;32) aufweisen welche mit den Verschleissegmenten schwalbenförmige Befestigungen bilden.
  4. Mahlbahn nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Verschleissegmente aus Chromguss sind.
  5. Mahlbahn nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Verschleissegmente zusammengesetzte Stücke mit einer metallischen Matrix oder mit Keramikeinsätzen mit einem guten Verschleisswiderstand sind.
EP97201084A 1996-04-30 1997-04-11 Mahlbahn Expired - Lifetime EP0804965B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU88753 1996-04-30
LU88753A LU88753A1 (fr) 1996-04-30 1996-04-30 Piste pour broyeurs

Publications (2)

Publication Number Publication Date
EP0804965A1 EP0804965A1 (de) 1997-11-05
EP0804965B1 true EP0804965B1 (de) 2001-11-21

Family

ID=19731596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97201084A Expired - Lifetime EP0804965B1 (de) 1996-04-30 1997-04-11 Mahlbahn

Country Status (8)

Country Link
US (1) US5839677A (de)
EP (1) EP0804965B1 (de)
CZ (1) CZ128697A3 (de)
DE (1) DE69708376T2 (de)
ES (1) ES2167672T3 (de)
ID (1) ID16850A (de)
LU (1) LU88753A1 (de)
ZA (1) ZA973663B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020118360A1 (en) * 2018-12-11 2020-06-18 Orbis Mining Pty Ltd Crushing of core samples
CN111068841B (zh) * 2020-01-15 2021-08-06 河南科技大学第一附属医院 一种用于心内中成药丸制备的药粉清选设备
CN112844638B (zh) * 2020-12-31 2023-05-30 松山湖材料实验室 预制体及其制备方法和耐磨件及其制备方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909330A (en) * 1954-09-30 1959-10-20 Hardinge Harlowe Pulverizing mill and process of pulverizing material
DE1507580A1 (de) * 1966-05-20 1969-04-03 Loesche Kg Verschleissteil,insbesondere Mahlringsegment fuer Waelzmuehlen,Walzenmuehlen,Federrollenmuehlen u.dgl.
ZA75455B (en) * 1974-02-25 1976-01-28 Polysius Ag Roll crushing mill
DE8204278U1 (de) * 1982-02-16 1982-06-24 Gebr. Pfeiffer Ag, 6750 Kaiserslautern Mahlschuessel fuer walzenmuehlen
DE3801229A1 (de) * 1988-01-18 1989-07-27 Krupp Polysius Ag Mahlverfahren sowie mahlanlage
DE3921419A1 (de) * 1989-06-29 1991-01-10 Loesche Gmbh Mahlflaeche von waelzmuehlen
DE3938320A1 (de) * 1989-11-17 1991-05-23 Krupp Polysius Ag Waelzmuehle
US5238046A (en) * 1990-09-20 1993-08-24 Magotteaux International Method of manufacturing a bimetal casting and wearing part produced by this method
BE1004573A4 (fr) * 1990-09-20 1992-12-15 Magotteaux Int Procede de fabrication d'une piece de fonderie bimetallique et piece d'usure realisee par ce procede.

Also Published As

Publication number Publication date
ZA973663B (en) 1997-12-01
CZ128697A3 (en) 1997-11-12
ES2167672T3 (es) 2002-05-16
DE69708376T2 (de) 2002-05-08
US5839677A (en) 1998-11-24
ID16850A (id) 1997-11-13
EP0804965A1 (de) 1997-11-05
LU88753A1 (fr) 1996-10-04
DE69708376D1 (de) 2002-01-03

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