EP0388826A2 - Impact element for an impact mill rotor - Google Patents

Impact element for an impact mill rotor Download PDF

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Publication number
EP0388826A2
EP0388826A2 EP90105085A EP90105085A EP0388826A2 EP 0388826 A2 EP0388826 A2 EP 0388826A2 EP 90105085 A EP90105085 A EP 90105085A EP 90105085 A EP90105085 A EP 90105085A EP 0388826 A2 EP0388826 A2 EP 0388826A2
Authority
EP
European Patent Office
Prior art keywords
impact body
impact
annular
wear
body 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
EP90105085A
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German (de)
French (fr)
Other versions
EP0388826B1 (en
EP0388826A3 (en
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
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Sbm Wageneder GmbH
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Publication date
Application filed by Sbm Wageneder GmbH filed Critical Sbm Wageneder GmbH
Priority to AT90105085T priority Critical patent/ATE90591T1/en
Publication of EP0388826A2 publication Critical patent/EP0388826A2/en
Publication of EP0388826A3 publication Critical patent/EP0388826A3/en
Application granted granted Critical
Publication of EP0388826B1 publication Critical patent/EP0388826B1/en
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 upper side 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 a radial positive fit.
  • Both ceramic pads 5.6 consist of a so-called hard ceramic, which contains about 90 wt.% Al203, and is a highly wear-resistant material in the form of dense, sintered compacts.

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

Abstract

An impact element for central arrangement in the rotor of an impact mill rotor tapers upwards towards the charging opening and is composed of a lower annular part and an upper cone-shaped part (1, 2). Each of the two parts (1, 2) of the impact element has a carrier disc (3, 4) and anti-wear protection arranged thereon.

Description

Die Erfindung betrifft einen Prallkörper für den Rotor einer Prallmühle zum Zerkleinern von Gestein od.dgl., der eine den Prallkörper zentrisch tragende Bodenplatte, eine Deckplatte mit einer zentrischen Aufgabeöffnung und Auswurföffnungen am Rotorumfang aufweist, wobei der Prallkörper sich nach oben verjüngt und aus einem unteren ringförmigen und einem oberen kegelförmigen Teil zusammen­gesetzt istThe 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

Ein derartiger Prallkörper ist beispielsweise der US-PS 4,065,063 zu entnehmen. Mittels des Prallkörpers wird das über die zentrische Aufgabeöffnung eingefüllte Material in die Horizontale umgelenkt, und dabei be­schleunigt. Die Erzeugende der Prallfläche verläuft zu diesem Zweck konkav, und der Verschluß des Prallkörpers nimmt nach unten zu. Die Zweiteiligkeit des Prallkörpers ermöglicht es, den wesentlich geringer verschleißenden kegelförmigen oberen Teil seltener als den unteren ringförmigen Teil auszutauschenSuch an impact body can be found, for example, in US Pat. No. 4,065,063. By means of the impact body, the material filled in via the central feed opening is deflected into the horizontal and accelerated in the process. For this purpose, 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

Die Erfindung hat es sich nun zur Aufgabe gestellt, einen Prallkörper der vorstehend genannten Art mit erhöhter Verschleißfestigkeit zu schaffen.The invention has now set itself the task of creating an impact body of the aforementioned type with increased wear resistance.

Dies wird erfindungsgemäß dadurch erreicht, daß jeder der beiden Teile des Prallkörpers eine Trägerscheibe und eine darauf angeordnete Verschleißbewehrung aufweist.This is achieved according to the invention in that each of the two parts of the impact body has a carrier disk and a wear reinforcement arranged thereon.

Durch den Aufbau aus Trägerscheibe und Verschleißbewehrung kann die Standzeit jeder der beiden Teile verbessert wer­den, wobei dem unterschiedlichen Verschleißverhalten noch dadurch Rechnung getragen werden kann, daß gegebenenfalls unterschiedliche Verschleißbewehrungen eingesetzt werden.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.

Eine bevorzugte Ausführung sieht dabei vor, daß die Ver­schleißbewehrungen aus Verschleißkeramikauflagen bestehen, die mit radialem Formschluß an den Trägerscheiben ver­klebt sind.A preferred embodiment provides that the wear reinforcements consist of wear ceramic supports which are glued to the carrier disks with radial positive locking.

Zwischen der Trägerscheibe und der Keramikauflage des ringförmigen Teiles wird der radiale Formschluß insbeson­dere dadurch erreicht, daß an der Oberseite der Träger­scheibe eine Ringnut zur Aufnahme eines Ringstegs der Keramikauflage vorgesehen ist. Die Verschleißbewehrung des ringförmigen Teiles kann als einteiliger Ringkörper ausgebildet oder auch zusammengesetzt sein.Between the carrier disc and the ceramic support of the annular part, 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.

Der radiale Formschluß zwischen der Trägerscheibe und der Keramikauflage des kegelförmigen Teiles kann bei­spielsweise durch einen Ringsteg an der Oberseite der Trägerscheibe erzielt werden, der in eine unterseitige Ausnehmung der Keramikauflage eingreiftThe 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 upper side of the carrier disc, which engages in a recess on the underside of the ceramic support

Als Keramikauflagen eignen sich insbesondere dichte, gesinterte Preßlinge, die etwa 90 Gew.% Aluminiumoxid enthalten.Dense, sintered compacts which contain about 90% by weight of aluminum oxide are particularly suitable as ceramic coatings.

Die Erfindung wird nachstehend an Hand der Figuren der beiliegenden Zeichnung näher beschrieben, ohne darauf beschränkt zu sein.The invention is described below with reference to the figures of the accompanying drawing, without being limited thereto.

Die Fig. 1 zeigt eine Draufsicht und die Fig. 2 einen Teilschnitt durch einen erfindungsgemäßen Prallkörper.1 shows a top view and FIG. 2 shows a partial section through an impact body according to the invention.

Eine Prallmühle umfaßt ein ringförmiges Gehäuse, in dem Prallflächen ausgebildet sind. Zentral ist ein Rotor vorgesehen, der auf einer Bodenplatte einen austausch­baren Prallkörper trägt. Diesem wird über eine zentrische Aufgabeöffnung das zu zerkleinernde Material zugeführt und vom Rotor gegen die Prallflächen des Gehäuses ge­worfen.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.

Der austauschbare Prallkörper weist einen ringförmigen Unterteil 1 und einen kegel- bzw. kegelstumpfförmigen Oberteil 2 auf. Der Unterteil 1 umfaßt eine ringförmige Trägerscheibe 3, die an der Oberseite eine Ringnut auf­weist, und eine mit einem Ringsteg 8 in die Ringnut ein­geklebte Keramikauflage 5, die aus mehreren Ringab­schnitten 7 zusammengesetzt ist. Ein die Ringnut nach außen begrenzender Steg 11 bewirkt einen radialen Form­schluß zwischen der Trägerscheibe 3 und der Keramik­auflage 5. Ein die Ringnut nach innen begrenzender Steg 10 überragt die Keramikauflage 5 und bildet eine Auflage für eine ringförmige Trägerscheibe 4 des Oberteiles 2. Die Trägerscheibe 4 trägt an der Oberseite einen Ring­steg 9, der in eine entsprechende unterseitige Aus­nehmung einer zweiten Keramikauflage 6, die kegel­stumpfförmig ausgebildet ist und auf der Trägerscheibe 4 ebenfalls unter radialem Formschluß verklebt ist, eingreift.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 a radial positive fit.

Beide Keramikauflagen 5,6 bestehen aus einer sogenannten Hartkeramik, die etwa 90 Gew. % Al₂0₃ enthält, und in Form von dichten, gesinterten Preßlingen ein hoch­verschleißfestes Material darstellt.Both ceramic pads 5.6 consist of a so-called hard ceramic, which contains about 90 wt.% Al₂0₃, and is a highly wear-resistant material in the form of dense, sintered compacts.

Claims (7)

1. Prallkörper für den Rotor einer Prallmühle zum Zerklei­nern von Gestein od.dgl., der eine den Prallkörper zen­trisch tragende Bodenplatte, eine Deckplatte mit einer zentrischen Aufgabeöffnung und Auswurföffnungen am Ro­torumfang aufweist, wobei der Prallkörper sich nach oben verjüngt und aus einem unteren ringförmigen und einem oberen kegelförmigen Teil zusammengesetzt ist, dadurch gekennzeichnet, daß jeder der beiden Teile (1, 2) des Prallkörpers eine Trägerscheibe (3,4) und eine darauf angeordnete Verschleißbewehrung aufweist.1. 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 consisting of a lower annular and is composed of an upper conical part, characterized in that each of the two parts (1, 2) of the impact body has a carrier disc (3, 4) and a wear reinforcement arranged thereon. 2. Prallkörper nach Anspruch 1, dadurch gekennzeichnet, daß die Verschleißbewehrungen aus Verschleißkeramik­auflagen (5, 6) bestehen, die mit radialem Formschluß an den Trägerscheiben (3, 4) verklebt sind.2. Impact body according to claim 1, characterized in that the wear reinforcements consist of wear ceramic pads (5, 6) which are glued to the carrier disks (3, 4) with radial positive locking. 3. Prallkörper nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß die Trägerscheibe (3) des ringförmigen Teiles (1) an der Oberseite eine Ringnut zur Aufnahme eines Ringstegs (8) der Verschleißbewehrung aufweist.3. impact body according to claim 1 or 2, characterized in that the carrier disc (3) of the annular part (1) at the top has an annular groove for receiving an annular web (8) of the wear reinforcement. 4. Prallkörper nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß die Trägerscheibe (4) des kegelförmigen Teiles (2) an der Oberseite einen Ringsteg (9) aufweist, der in eine unterseitige Ausnehmung der Verschleißbewehrung eingreift.4. impact body according to claim 1 or 2, characterized in that the carrier disc (4) of the conical part (2) at the top has an annular web (9) which engages in a recess on the underside of the wear reinforcement. 5. Prallkörper nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Verschleißbewehrung des ring­förmigen Teiles (1) aus einem einteiligen Ringkörper besteht.5. impact body according to one of claims 1 to 3, characterized in that the wear reinforcement of the annular part (1) consists of a one-piece ring body. 6. Prallkörper nach Anspruch 2 oder 3, dadurch gekennzeich­net, daß die Keramikauflage (5) des ringförmigen Teiles (1) aus einzelnen Ringabschnitten (7) zusammengesetzt ist.6. impact body according to claim 2 or 3, characterized in that the ceramic support (5) of the annular part (1) from individual ring sections (7) is composed. 7. Prallkörper nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Keramikauflagen (5,6) durch dichte, gesinterte Preßlinge mit etwa 90 Gew. % Aluminium­oxid gebildet sind7. impact body according to one of claims 2 to 6, characterized in that the ceramic pads (5,6) are formed by dense, sintered compacts with about 90 wt.% Alumina
EP90105085A 1989-03-21 1990-03-17 Impact element for an impact mill rotor Expired - Lifetime EP0388826B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90105085T ATE90591T1 (en) 1989-03-21 1990-03-17 IMPACT BODY FOR AN IMPACT MILL ROTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8903503U 1989-03-21
DE8903503U DE8903503U1 (en) 1989-03-21 1989-03-21 Impact body for an impact mill rotor

Publications (3)

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

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EP90105085A Expired - Lifetime EP0388826B1 (en) 1989-03-21 1990-03-17 Impact element for an impact mill rotor

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EP (1) EP0388826B1 (en)
AT (1) ATE90591T1 (en)
DE (2) DE8903503U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002061353A1 (en) * 2001-01-31 2002-08-08 Kabushiki Kaisha Piste Snow Industries Artificial snow producing and releasing apparatus and method thereof
WO2008147274A1 (en) 2007-05-30 2008-12-04 Sandvik Intellectual Property Ab Distributor plate for a vsi-crusher and a method of replacing such a plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69226623T2 (en) * 1992-03-27 1999-04-22 Nakayama Iron Works, Ltd., Takeo, Saga Impact mill with vertical axis of rotation

Citations (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
US4844354A (en) * 1988-03-05 1989-07-04 Nakayama Iron Works Centrifugal refining crusher

Patent Citations (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
US4844354A (en) * 1988-03-05 1989-07-04 Nakayama Iron Works Centrifugal refining crusher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002061353A1 (en) * 2001-01-31 2002-08-08 Kabushiki Kaisha Piste Snow Industries Artificial snow producing and releasing apparatus and method thereof
WO2008147274A1 (en) 2007-05-30 2008-12-04 Sandvik Intellectual Property Ab Distributor plate for a vsi-crusher and a method of replacing such a plate
EP2160244A4 (en) * 2007-05-30 2014-05-07 Sandvik Intellectual Property Distributor plate for a vsi-crusher and a method of replacing such a plate

Also Published As

Publication number Publication date
DE59001746D1 (en) 1993-07-22
DE8903503U1 (en) 1989-05-11
EP0388826B1 (en) 1993-06-16
EP0388826A3 (en) 1990-12-19
ATE90591T1 (en) 1993-07-15

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