EP0206207B2 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP0206207B2
EP0206207B2 EP19860108202 EP86108202A EP0206207B2 EP 0206207 B2 EP0206207 B2 EP 0206207B2 EP 19860108202 EP19860108202 EP 19860108202 EP 86108202 A EP86108202 A EP 86108202A EP 0206207 B2 EP0206207 B2 EP 0206207B2
Authority
EP
European Patent Office
Prior art keywords
cavity
grinding
ground
outlet openings
agitator
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
EP19860108202
Other languages
German (de)
English (en)
Other versions
EP0206207B1 (fr
EP0206207A3 (en
EP0206207A2 (fr
Inventor
Giacomo Dr. Canepa
Klaus Ott
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.)
Erich Netzsch GmbH and Co Holding KG
Original Assignee
Erich Netzsch GmbH and Co Holding KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6273487&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0206207(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE3521668A external-priority patent/DE3521668C3/de
Application filed by Erich Netzsch GmbH and Co Holding KG filed Critical Erich Netzsch GmbH and Co Holding KG
Publication of EP0206207A2 publication Critical patent/EP0206207A2/fr
Publication of EP0206207A3 publication Critical patent/EP0206207A3/de
Publication of EP0206207B1 publication Critical patent/EP0206207B1/fr
Application granted granted Critical
Publication of EP0206207B2 publication Critical patent/EP0206207B2/fr
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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/161—Arrangements for separating milling media and ground material

Definitions

  • the invention relates to an agitator mill according to the preambles of claims 1 and 2.
  • the invention is based on FIGS. 1 to 3 of document EP-A-146 852.
  • the separating device is arranged in a protected manner within the cavity open at the end in the end section of the agitator shaft, so that grinding media activated directly by the agitator shaft have hardly any possibility of impacting the separating device. Nevertheless, the risk of the separating device becoming clogged is avoided; the grinding media with the regrind axially through the open end of the agitator shaft into its cavity flow past the separating device without accumulating there, since they are thrown through the outlet openings due to the rotation of the agitator shaft.
  • the present invention is based on the object of making the regrind flow through the cavity at the inner shaft end even more intensive, in particular by further improving the outflow of the grinding media from this cavity.
  • tangential outlet openings can be accommodated particularly well; in addition, the cross-sectional shape of the end section of the agitator shaft deviating from a circular cross section has the advantage that around this end section within the grinding chamber there is always free space for the grinding bodies flowing out of the cavity.
  • the outlet openings are separated from one another by webs to which stirring elements are fastened on the outside.
  • the stirring elements can form an at least approximately gap-free deflection area around the outlet openings, in which grinding media are prevented from penetrating into the cavity. In this way, too, the outflow of the grinding media from the cavity is facilitated and the axial inflow of regrind into the cavity is thereby also promoted.
  • EP-A-146 852 there is also the possibility that the separating device in the form of a sieve jacket is arranged at least approximately coaxially with the agitator shaft on a tube which extends through part of the grinding chamber from the inner shaft end into the cavity.
  • EP-A-146 852 can be developed according to the present invention in that the separating device is clamped axially between the tube and a coolable insert body.
  • the horizontal agitator mill shown in FIGS. 1 and 2 has a box-shaped frame 10 on which an essentially cylindrical grinding container 12 and axially next to this a bearing housing 14 are fastened.
  • the frame 10 contains a drive motor, not shown, and is connected to the bearing housing 14 by a gear housing 16, in which a gear, also not shown, with an adjustable transmission ratio is arranged.
  • the grinding container 12 contains a circular cylindrical grinding chamber 18 in which an agitator 20 is arranged.
  • the agitator 20 consists essentially of an agitator shaft 22 which is mounted in the bearing housing 14 and extends coaxially with the grinding container 12 through almost the entire grinding chamber 18, and a number of rod-shaped stirring elements 24 which are attached to the agitator shaft 22 at equal axial intervals and in between protrude between counter rods 26 attached to the grinding container 12.
  • a grinding material inlet 28 is arranged, through which a suspension or slurry of grinding material and liquid is continuously pumped into the grinding chamber 18 during operation.
  • the regrind outlet has a tube 32 on which a flange 34 is formed. The flange 34 is screwed to a cover 36 which forms the end face of the grinding container 12 facing away from the gear housing 16.
  • the tube 32 extends - coaxially with the stirring shaft 22 in the example shown - through the cover 36 and the adjacent area of the grinding chamber 18 to an end section 38 of the stirring shaft 22.
  • the end section 38 is detachably screwed to the main part of the stirring shaft 22 and points a cavity 40 open at the end or end, in which a separating device 42 is arranged.
  • the separating device 42 is formed by a cylindrical sieve cartridge, which extends immediately after the tube 32 coaxially with the agitator shaft 22 over the greater part of the length of the cavity 40 and is closed off by a solid, plate-shaped end wall 44.
  • slit-shaped, axially parallel outlet openings 46 are incorporated in the end section 38 of the agitator shaft 22, which extend over the greater part of the length of the cavity 40, so that the separating device 42 is enclosed by these outlet openings 46 almost over their entire length.
  • the outlet openings 46 are separated from one another by axially parallel webs 48, so that the end section 38 as a whole resembles a cage which is open on its end face.
  • a rod-shaped stirring element 24 is fastened in the middle of each second web 48; axially offset against this stirring element, two stirring elements 24 are fastened to the remaining webs 48.
  • the stirring elements 24, which are fastened to the webs 48 as a whole thus form a deflection area around the outlet openings 46 that is at least approximately complete in the axial direction.
  • the grinding chamber 18 contains a mixture of grinding media 50 and grinding stock 52, which is activated in the grating by rotating the agitator shaft 22 at a speed which is usual in agitator mills in the order of magnitude of, for example, 200 to 3000 revolutions per minute, depending on the nature of the grinding stock and Diameter of the agitator shaft and the grinding media.
  • a vacuum is generated by a pump, not shown, which allows the grinding media 50 and regrind 52 to flow from the grinding chamber 18 into the cavity 40.
  • the finished regrind 52 passes through the separating device 42 into the tube 32, while the grinding media 50 are retained and flow back through the outlet openings 46 into the grinding chamber 18. This backflow is promoted by the centrifugal forces which result from the action of the webs 48 and the stirring elements 24 attached to them on the grinding media 50.
  • the end wall 44 is part of a closed hollow insert body 78, which is connected to a coolant circuit via an inlet line 80 and an outlet line 82 and is clamped to the flange 34 by a tie rod 84, as a result of which the separating device 42 designed as a filter cartridge between the End wall 44 and the opposite end of the tube 32 is interchangeably clamped.
  • FIGS. 3 and 4 differs from that according to FIG. 2 in that the cage-like end section 38 of the agitator shaft 22 is formed by two rows of slender cylindrical rods 86.
  • Each of these rows of rods 86 is arranged in the form of a half Archimedean spiral, as shown in FIG. 4, so that the rods are particularly endeavored to hurl grinding media outwards when the agitator shaft 22 moves in the direction of rotation, in the sense of arrows 88 in FIG 4 turns.
  • the rods 86 are fastened on the one hand to the main part of the agitator shaft 22 and on the other hand to a flat ring 90 which encloses the axially inner end of the tube 32.
  • a flat ring 90 which encloses the axially inner end of the tube 32.
  • an annular gap is left that is wide enough to allow the grinding media 50 to enter the cavity 40 together with the grinding stock 52.
  • the attachment of the rods 86 to the main part of the agitator shaft 22 and / or to the ring 90 can be releasable; in this case, the rods can be enclosed by an exchangeable wear sleeve.
  • the end section 38 of the agitator shaft 22 is shaped like an ellipse in accordance with FIG. 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Claims (3)

  1. Broyeur-agitateur, comprenant
    - une cuve de broyage qui renferme une chambre de broyage (18) pouvant être remplie, au moins en partie, de corps de broyage (50) et de matière à broyer (52), et comporte une entrée (28) pour matière à broyer ainsi qu'une sortie (30) pour matière broyée,
    - un arbre d'agitateur (22) comportant un bout (38) disposé dans la chambre de broyage (18) et ayant une cavité (40),
    - et un ensemble séparateur (42) dont au moins la plus grande partie est disposée à l'intérieur de la cavité (40), et qui permet l'écoulement de la matière (52) complètement broyée à partir de la chambre de broyage (18) vers la sortie (30) pour matière broyée, mais retient des corps de broyage,
    - la cavité (40) présentant, au bout intérieur de l'arbre, une face ouverte, de sorte que des corps de broyage (50) et de la matière à broyer (52) peuvent y entrer à travers ladite face,
    - et le bout (38) de l'arbre d'agitateur (22) comportant, autour de la cavité (40), des ouvertures de sortie (46) qui permettent aux corps de broyage (50) ayant pénétré à travers le bout intérieur de l'arbre dans la cavité, de refluer à la chambre de broyage (18),
    - une partie, au moins, des ouvertures de sortie (46) étant disposées tangentiellement par rapport à l'ensemble séparateur (42) et étant dirigées vers l'arrière quand on se réfère à la direction de rotation de l'arbre d'agitateur (22) en fonctionnement,
    caractérisé en ce que le bout (38) de l'arbre d'agitateur (22) qui comporte les ouvertures de sortie (46) tangentielles a une configuration elliptique ou polygonale en section droite.
  2. Broyeur-agitateur, comprenant
    - une cuve de broyage qui renferme une chambre de broyage (18) pouvant être remplie, au moins en partie, de corps de broyage (50) et de matière à broyer (52), et comporte une entrée (28) pour matière à broyer ainsi qu'une sortie (30) pour matière broyée,
    - un arbre d'agitateur (22) comportant un bout (38) disposé dans la chambre de broyage (18) et ayant une cavité (40),
    - et un ensemble séparateur (42) dont au moins la plus grande partie est disposée à l'intérieur de la cavité (40) et qui permet l'écoulement de la matière (52) complètement broyée à partir de la chambre de broyage (18) vers la sortie (30) pour matière broyée, mais retient des corps de broyage,
    - la cavité (40) présentant, au bout intérieur de l'arbre, une face ouverte, de sorte que des corps de broyage (50) et de la matière à broyer (52) peuvent y entrer à travers ladite face,
    - et le bout (38) de l'arbre d'agitateur (22) comportant, autour de la cavité (40), des ouvertures de sortie (46) qui permettent aux corps de broyage (50) ayant pénétré à travers le bout intérieur de l'arbre dans la cavité, de refluer à la chambre de broyage (18),
    - une partie, au moins, des ouvertures de sortie (46) étant disposées tangentiellement par rapport à l'ensemble séparateur (42) et étant dirigées vers l'arrière quand on se réfère à la direction de rotation de l'arbre d'agitateur (22) en fonctionnement,
    caractérisé en ce que les ouvertures de sortie (46) tangentielles sont réalisées entre des séries de barres (86) parallèles à l'axe, barres qui sont disposées, dans une section droite coupant le bout (38) de l'arbre d'agitateur (22), de manière à constituer des spirales d'Archimède.
  3. Broyeur-agitateur selon la revendication 1 ou 2,
    caractérisé en ce que l'ensemble séparateur (42), sous la forme d'une enveloppe-tamis, est monté avec une orientation sensiblement co-axiale par rapport à l'arbre d'agitateur (22) sur un tube (32) qui s'étend, à partir du bout intérieur de l'arbre, en pénétrant à travers une partie de la chambre de broyage (18), dans la cavité (40), l'ensemble séparateur (42) étant fixé axialement entre le tube (32) et un corps rapporté (78) susceptible d'être refroidi.
EP19860108202 1985-06-18 1986-06-16 Broyeur agitateur Expired - Lifetime EP0206207B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3521668 1985-06-18
DE3521668A DE3521668C3 (de) 1983-12-16 1985-06-18 Rührwerksmühle

Publications (4)

Publication Number Publication Date
EP0206207A2 EP0206207A2 (fr) 1986-12-30
EP0206207A3 EP0206207A3 (en) 1987-11-25
EP0206207B1 EP0206207B1 (fr) 1989-05-24
EP0206207B2 true EP0206207B2 (fr) 1994-03-02

Family

ID=6273487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860108202 Expired - Lifetime EP0206207B2 (fr) 1985-06-18 1986-06-16 Broyeur agitateur

Country Status (2)

Country Link
EP (1) EP0206207B2 (fr)
DE (1) DE3663454D1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3727863C1 (de) * 1987-08-20 1989-03-02 Netzsch Erich Holding Ruehrwerksmuehle mit Zufuehrrohr fuer Mahlkoerper
JPH01171627A (ja) * 1987-12-28 1989-07-06 Inoue Seisakusho:Kk 湿式媒体分散機
DE4002613A1 (de) * 1990-01-30 1991-08-01 Draiswerke Gmbh Ruehrwerksmuehle
DE4009092C1 (fr) * 1990-03-21 1991-05-23 Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De
DE4029139A1 (de) * 1990-09-13 1992-03-19 Netzsch Erich Holding Ruehrwerksmuehle
JP4991372B2 (ja) * 2007-04-06 2012-08-01 アシザワ・ファインテック株式会社 メディア攪拌ミル
CN111617848B (zh) * 2019-02-27 2024-11-05 常州市龙鑫智能装备股份有限公司 双转子砂磨机离心转子及其砂磨机
CN113786909A (zh) * 2021-09-18 2021-12-14 成都利君实业股份有限公司 内设凹槽的搅拌筒及搅拌磨机
CN117654707B (zh) * 2022-08-30 2026-04-21 广东派勒智能纳米科技股份有限公司 一种研磨机分离结构
DE102022125879A1 (de) * 2022-10-07 2024-04-18 Netzsch-Feinmahltechnik Gmbh Rührwerksmühle
DE102022134099A1 (de) * 2022-12-20 2024-06-20 Netzsch-Feinmahltechnik Gmbh Rührwerksmühle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3345680A1 (de) * 1983-12-16 1985-06-20 Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb Ruehrwerksmuehle

Also Published As

Publication number Publication date
EP0206207B1 (fr) 1989-05-24
EP0206207A3 (en) 1987-11-25
DE3663454D1 (en) 1989-06-29
EP0206207A2 (fr) 1986-12-30

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