EP0388826B1 - Elément d'impact pour rotor de broyeur à impact - Google Patents

Elément d'impact pour rotor de broyeur à impact Download PDF

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Publication number
EP0388826B1
EP0388826B1 EP90105085A EP90105085A EP0388826B1 EP 0388826 B1 EP0388826 B1 EP 0388826B1 EP 90105085 A EP90105085 A EP 90105085A EP 90105085 A EP90105085 A EP 90105085A EP 0388826 B1 EP0388826 B1 EP 0388826B1
Authority
EP
European Patent Office
Prior art keywords
impact body
impact
annular
body according
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
EP90105085A
Other languages
German (de)
English (en)
Other versions
EP0388826A3 (en
EP0388826A2 (fr
Inventor
Johann Grafinger
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.)
Sbm Wageneder GmbH
Original Assignee
Sbm Wageneder 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 Sbm Wageneder GmbH filed Critical Sbm Wageneder GmbH
Priority to AT90105085T priority Critical patent/ATE90591T1/de
Publication of EP0388826A2 publication Critical patent/EP0388826A2/fr
Publication of EP0388826A3 publication Critical patent/EP0388826A3/de
Application granted granted Critical
Publication of EP0388826B1 publication Critical patent/EP0388826B1/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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B02C2013/28618—Feeding means
    • B02C2013/28681—Feed distributor plate for vertical mill

Definitions

  • the invention relates to an impact body for the rotor of an impact mill for crushing rock or the like, which has a base plate supporting the impact body centrally, a cover plate with a central feed opening and ejection openings on the rotor circumference, the impact body tapering upwards and out of a lower one annular and an upper conical part is composed.
  • Such an impact body can be found, for example, in US Pat. No. 4,065,063.
  • the material filled in via the central feed opening is deflected into the horizontal and accelerated in the process.
  • the generatrix of the impact surface is concave, and the closure of the impact body increases downwards.
  • the two-part design of the impact body makes it possible to replace the cone-shaped upper part, which is subject to considerably less wear, less frequently than the lower annular part.
  • the invention has now set itself the task of creating an impact body of the aforementioned type with increased wear resistance.
  • each of the two parts of the impact body has a carrier disk and a wear reinforcement arranged thereon.
  • the service life of each of the two parts can be improved by the construction of the carrier washer and wear reinforcement, wherein the different wear behavior can also be taken into account by the fact that different wear reinforcements may be used.
  • wear reinforcements consist of wear ceramic supports which are glued to the carrier disks with radial positive locking.
  • the radial positive connection is achieved in particular in that an annular groove is provided on the top of the carrier disc for receiving an annular web of the ceramic support.
  • the wear reinforcement of the annular part can be designed as a one-piece ring body or can also be composed.
  • the radial positive engagement between the carrier disc and the ceramic support of the conical part can be achieved, for example, by an annular web on the top of the carrier disc, which engages in a recess on the underside of the ceramic support.
  • Dense, sintered compacts which contain about 90% by weight of aluminum oxide are particularly suitable as ceramic coatings.
  • FIG. 1 shows a top view and FIG. 2 shows a partial section through an impact body according to the invention.
  • An impact mill comprises an annular housing in which impact surfaces are formed.
  • a rotor is provided centrally, which carries an exchangeable impact body on a base plate. The material to be shredded is fed to this through a central feed opening and thrown by the rotor against the baffles of the housing.
  • the exchangeable impact body has an annular lower part 1 and a frustoconical or frustoconical upper part 2.
  • the lower part 1 comprises an annular carrier disk 3, which has an annular groove on the upper side, and a ceramic support 5 which is glued into the annular groove with an annular web 8 and which is composed of a plurality of annular sections 7.
  • a web 11 delimiting the annular groove leads to a radial positive locking between the carrier disk 3 and the ceramic support 5.
  • a web 10 delimiting the annular groove projects beyond the ceramic support 5 and forms a support for an annular carrier disk 4 of the upper part 2.
  • the carrier disk 4 carries on the top, an annular web 9, which engages in a corresponding underside recess of a second ceramic support 6, which is frustoconical and is also glued to the carrier disk 4 with radial positive locking.
  • Both ceramic pads 5.6 consist of a so-called hard ceramic, which contains about 90 wt.% Al2O3, and is a highly wear-resistant material in the form of dense, sintered compacts.

Landscapes

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

Claims (7)

  1. Elément de choc (1, 2) pour le rotor d'un broyeur à chocs destiné à broyer des pierres ou des éléments similaires, lequel rotor comporte une plaque de base portant de façon centrée l'élément de choc (1, 2), et une plaque de recouvrement pourvue d'une ouverture d'alimentation centrale et d'ouvertures d'évacuation situées à la périphérie du rotor, étant précisé que l'élément de choc (1, 2) va en s'effilant vers le haut et est composé d'une partie inférieure annulaire (1) et d'une partie supérieure conique (2), caractérisé en ce que chacune des deux parties (1, 2) de l'élément de choc comporte une plaque support (3, 4) et un élément de protection contre l'usure (5, 6) disposé sur celle-ci.
  2. Elément de choc selon la revendication 1, caractérisé en ce que les éléments de protection contre l'usure se composent de pièces d'appui d'usure en céramique (5, 6) qui sont collées aux plaques supports (3, 4) suivant une complémentarité de forme radiale.
  3. Elément de choc selon la revendication 1 ou 2, caractérisé en ce que la plaque support (3) de la partie annulaire (1) présente, sur sa face supérieure, une rainure annulaire destinée à recevoir une nervure annulaire (8) de l'élément de protection contre l'usure.
  4. Elément de choc selon la revendication 1 ou 2, caractérisé en ce que la plaque support (4) de la partie conique (2) présente, sur sa face supérieure, une nervure annulaire (9) qui vient en prise dans une cavité prévue sur la face inférieure de l'élément de protection contre l'usure.
  5. Elément de choc selon l'une des revendications 1 à 3, caractérisé en ce que l'élément de protection contre l'usure de la partie annulaire (1) se compose d'un corps annulaire d'une seule pièce.
  6. Elément de choc selon la revendication 2 ou 3, caractérisé en ce que la pièce d'appui en céramique (5) de la partie annulaire (1) se compose de segments d'anneau individuels (7).
  7. Elément de choc selon l'une des revendications 2 à 6, caractérisé en ce que les pièces d'appui en céramique (5, 6) sont définies par des pièces pressées denses obtenues par frittage et contenant environ 90 % en poids d'oxyde d'aluminium.
EP90105085A 1989-03-21 1990-03-17 Elément d'impact pour rotor de broyeur à impact Expired - Lifetime EP0388826B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90105085T ATE90591T1 (de) 1989-03-21 1990-03-17 Prallkoerper fuer einen prallmuehlenrotor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8903503U 1989-03-21
DE8903503U DE8903503U1 (de) 1989-03-21 1989-03-21 Prallkörper für einen Prallmühlenrotor

Publications (3)

Publication Number Publication Date
EP0388826A2 EP0388826A2 (fr) 1990-09-26
EP0388826A3 EP0388826A3 (en) 1990-12-19
EP0388826B1 true EP0388826B1 (fr) 1993-06-16

Family

ID=6837353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105085A Expired - Lifetime EP0388826B1 (fr) 1989-03-21 1990-03-17 Elément d'impact pour rotor de broyeur à impact

Country Status (3)

Country Link
EP (1) EP0388826B1 (fr)
AT (1) ATE90591T1 (fr)
DE (2) DE8903503U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562194B1 (fr) * 1992-03-27 1998-08-12 Nakayama Iron Works, Ltd. Broyeur à impact à axe vertical
EP1356244B1 (fr) * 2001-01-31 2007-09-12 Kabushiki Kaisha Piste Snow Industries Appareil de production et de liberation de neige artificielle et son procede
SE531538C2 (sv) * 2007-05-30 2009-05-12 Sandvik Intellectual Property Fördelningsplatta för VSI-kross och förfarande för byte av sådan platta

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB269319A (en) * 1926-04-01 1927-04-21 Wilfred Rothery Wood Improved method of pulverising and apparatus therefor
US3578254A (en) * 1968-09-23 1971-05-11 Bruce V Wood Impact crusher
US4065063A (en) * 1976-07-06 1977-12-27 El-Jay, Inc. Impact crusher
US4090673A (en) * 1977-02-18 1978-05-23 Canica Crushers Ltd. Centrifugal impact rock crushers
DE3821360A1 (de) * 1988-03-05 1989-09-14 Nakayama Iron Works Ltd Prallzerkleinerer

Also Published As

Publication number Publication date
DE8903503U1 (de) 1989-05-11
EP0388826A3 (en) 1990-12-19
EP0388826A2 (fr) 1990-09-26
ATE90591T1 (de) 1993-07-15
DE59001746D1 (de) 1993-07-22

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