EP0804965A1 - Mahlbahn - Google Patents

Mahlbahn Download PDF

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Publication number
EP0804965A1
EP0804965A1 EP97201084A EP97201084A EP0804965A1 EP 0804965 A1 EP0804965 A1 EP 0804965A1 EP 97201084 A EP97201084 A EP 97201084A EP 97201084 A EP97201084 A EP 97201084A EP 0804965 A1 EP0804965 A1 EP 0804965A1
Authority
EP
European Patent Office
Prior art keywords
segments
wear
sole
track
track according
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.)
Granted
Application number
EP97201084A
Other languages
English (en)
French (fr)
Other versions
EP0804965B1 (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
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 Magotteaux International SA filed Critical Magotteaux International SA
Publication of EP0804965A1 publication Critical patent/EP0804965A1/de
Application granted granted Critical
Publication of EP0804965B1 publication Critical patent/EP0804965B1/de
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 at least one circular raceway evolving below grinding rollers to grind material poured onto the track.
  • a grinder of the kind targeted by the present invention is, for example, described in patent EP 0476496 B1.
  • the tracks both those with a single raceway and those with a double raceway, are generally made up of separate segments or segments juxtaposed, which allows easier handling of these elements of limited weight because you have to know that the weight total of a whole track can be of the order of a few tens of tonnes.
  • it can be replaced individually without the need to replace the entire track.
  • grinder tracks Due to 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 very hard chromium cast iron. On the other hand, the segments must undergo very precise machining in order to be fixed correctly on the table of the crusher and protect it against any degradation likely to occur during service. These requirements are not mutually compatible, the machining of a chrome cast iron track is very difficult and very expensive.
  • the wear of the tracks with double raceway is, moreover, irregular insofar as the internal raceway wears out faster than the external raceway.
  • the shapes of the wear profiles of the raceways are also different, which leads to differences in the grinding efficiency of one raceway compared to the other and reduces the efficiency of the mill.
  • it is the state of wear of the inner race which is decisive for the replacement of the segments and it is often necessary to replace a track or a segment while its region forming the outer raceway could still be used for some time.
  • the object of the present invention is to provide a new track for shredders which makes it possible to remedy these drawbacks, in particular to provide a track with better resistance to wear and a track which manifests more uniform wear.
  • each segment consists of a machinable steel sole with an outer edge and an inner edge defining a housing for a segment wear having high wear resistance and removably attached to the sole, the upper surface of the wear segment forming the race or tracks.
  • the sole it is possible to choose for the sole an easily machinable steel since the sole is not subjected to grinding wear.
  • the sole can therefore be machined in optimal conditions to be fixed correctly on the rotary table which must remain in perfect condition.
  • the wear segments can be fixed to the sole using screws and clamps.
  • edges of the sole may have bevelled parts forming dovetail attachments with the wear segments.
  • the track can comprise a series of interior wear segments and a series of exterior wear segments defining two concentric raceways while each sole has a protruding central rib in an arc of a circle separating the interior segments. outer segments.
  • the inner segments and the outer segments can be replaced separately and the outer segment, more particularly, can remain in place until the outer race is completely worn. It is also possible to choose a harder material for the inner segments in order to ensure uniform wear of the two raceways.
  • the invention offers the possibility of choosing different materials for each of the wear segments and of regularizing the general wear profile by choosing a harder material where the track wears the most and make 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. It has on its upper face two concentric annular raceways, of concave section, more specifically an internal raceway 12 and an external raceway 14 which evolve below two pairs of grinding rollers not shown with convex running surface .
  • the two raceways 12 and 14 are defined in a series of internal wear segments 16 respectively a series of external wear segments 18, these segments being made of very wear-resistant material.
  • 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 of treated steel to obtain good mechanical properties and be easily machinable.
  • the sole 20 has a flat base 22 with an inner edge 24 and an outer edge 26 delimiting with a median projecting rib 28 in an arc of a circle the locations of the wear segments 16 and 18.
  • the inner and outer edges 24 and 26 comprise, preferably, inclined corners 30 respectively 32 cooperating with corresponding beveled corners of the segments 16 and 18 to define solid dovetail fasteners of the wear segments.
  • the wear segments may have, on their lower surface, cells 34 into which pins 36 penetrate through the sole 20 to ensure correct positioning of the segments when they are put in place and to prevent any displacement. relative to 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Rolling Contact Bearings (AREA)
  • Crushing And Grinding (AREA)
  • Golf Clubs (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP97201084A 1996-04-30 1997-04-11 Mahlbahn Expired - Lifetime EP0804965B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111068841A (zh) * 2020-01-15 2020-04-28 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12011722B2 (en) * 2018-12-11 2024-06-18 Orbis Mining Pty Ltd. Crushing of core samples
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507580A1 (de) * 1966-05-20 1969-04-03 Loesche Kg Verschleissteil,insbesondere Mahlringsegment fuer Waelzmuehlen,Walzenmuehlen,Federrollenmuehlen u.dgl.
FR2262476A7 (de) * 1974-02-25 1975-09-19 Polysius Ag
BE897937Q (fr) * 1982-02-16 1984-01-30 Pfeiffer A G Geb Cuvette de mouture pour moulins a cylindres
EP0405518A2 (de) * 1989-06-29 1991-01-02 Loesche Gmbh Mahlfläche von Wälzmühlen
EP0476496A1 (de) * 1990-09-20 1992-03-25 Magotteaux International Verfahren zur Herstellung eines bimetallischen Gussstückes und Verschleissteil nach diesem Verfahren

Family Cites Families (4)

* 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
DE3801229A1 (de) * 1988-01-18 1989-07-27 Krupp Polysius Ag Mahlverfahren sowie mahlanlage
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507580A1 (de) * 1966-05-20 1969-04-03 Loesche Kg Verschleissteil,insbesondere Mahlringsegment fuer Waelzmuehlen,Walzenmuehlen,Federrollenmuehlen u.dgl.
FR2262476A7 (de) * 1974-02-25 1975-09-19 Polysius Ag
BE897937Q (fr) * 1982-02-16 1984-01-30 Pfeiffer A G Geb Cuvette de mouture pour moulins a cylindres
EP0405518A2 (de) * 1989-06-29 1991-01-02 Loesche Gmbh Mahlfläche von Wälzmühlen
EP0476496A1 (de) * 1990-09-20 1992-03-25 Magotteaux International Verfahren zur Herstellung eines bimetallischen Gussstückes und Verschleissteil nach diesem Verfahren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111068841A (zh) * 2020-01-15 2020-04-28 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
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

Also Published As

Publication number Publication date
DE69708376D1 (de) 2002-01-03
ES2167672T3 (es) 2002-05-16
EP0804965B1 (de) 2001-11-21
LU88753A1 (fr) 1996-10-04
ZA973663B (en) 1997-12-01
DE69708376T2 (de) 2002-05-08
US5839677A (en) 1998-11-24
ID16850A (id) 1997-11-13
CZ128697A3 (en) 1997-11-12

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