EP0265580B1 - Broyeur à impact pour le broyage de roches ou semblables - Google Patents

Broyeur à impact pour le broyage de roches ou semblables Download PDF

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Publication number
EP0265580B1
EP0265580B1 EP87102358A EP87102358A EP0265580B1 EP 0265580 B1 EP0265580 B1 EP 0265580B1 EP 87102358 A EP87102358 A EP 87102358A EP 87102358 A EP87102358 A EP 87102358A EP 0265580 B1 EP0265580 B1 EP 0265580B1
Authority
EP
European Patent Office
Prior art keywords
rotor
pocket
hard metal
carrier body
impact
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
EP87102358A
Other languages
German (de)
English (en)
Other versions
EP0265580A2 (fr
EP0265580A3 (en
Inventor
Günter Müller
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
Publication of EP0265580A2 publication Critical patent/EP0265580A2/fr
Publication of EP0265580A3 publication Critical patent/EP0265580A3/de
Application granted granted Critical
Publication of EP0265580B1 publication Critical patent/EP0265580B1/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
    • B02C13/1835—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 by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B02C13/1842—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 by means of beater or impeller elements fixed in between an upper and lower rotor disc with dead bed protected beater or impeller elements

Definitions

  • the invention relates to an impact mill according to the preamble of patent claim 1.
  • the hard metal strip which extends approximately perpendicular to the plane of contact, protrudes from the corner of the carrier body, in which a receiving slot is formed.
  • the hard metal strip is therefore formed by a thin plate, the service life of which essentially depends only on the part protruding from the carrier body. As soon as this part of the hard metal strip has been worn away, the corner region of the carrier body carrying the slot is increasingly worn, so that the hold of the hard metal strip is lost before the part inserted into the slot is worn.
  • the hard metal reinforcement has an approximately L-shaped shape there, which extends radially outward from the ejection-side edge of the material pocket and in this first effective surface section encloses an angle between 180 ° and 195 ° with the plane of contact.
  • a second surface section is recessed and protrudes beyond the rotor circumference.
  • the invention has now set itself the task of further improving such impact mills, so that their Working times should only be determined by the service life of the hard metal reinforcement elements.
  • the hard metal strip which preferably consists of an alloy with a tungsten carbide content of more than 91%, the rest essentially cobalt, has a wear surface which recoils in a circular arc from the tear-off edge in the ejection direction and an outer edge protruding beyond the circumference of the rotor.
  • Approximately perpendicular to the plane of contact is understood to mean a deviation from the vertical up to 15 °, since an essentially vertical extension to the edge-near portion of the curved surface of the material which is set in the material pocket is to be achieved.
  • This curved surface is material and speed dependent and follows a spiral line.
  • An angle of approx. 95 ° to 100 ° has proven to be a good average for common applications.
  • a preferred embodiment provides that the circular arc-shaped wear surface extends over a quarter circle.
  • the circular arc essentially corresponds to the ejection line of the material, so that the wear surface is worn out fairly uniformly.
  • the edges between the wear surface and the mounting surface resting on the carrier body or the pocket-side inner surface of the hard metal strip are preferably rounded.
  • the support body used to support the hard metal strip is preferably essentially plate-shaped and has a bevelled contact surface for the hard metal strip.
  • the two pocket-side surfaces that is to say the inner surface of the hard metal strip and the surface of the carrier body forming the pocket bottom, advantageously extend approximately symmetrically to a radius of the rotor, the angle of symmetry preferably being 50 ° to 55 °.
  • FIG. 1 shows a vertical section through an impact mill according to the invention
  • FIG. 2 shows a horizontal section through a rotor in a first embodiment
  • FIG. 3 enlarges in detail an end of a rotor blade equipped with the wear body.
  • the impact mill according to the invention has an annular housing 1 on a substructure having the drive and the outlet opening for the comminuted material, which is approximately U-shaped in cross section, the open side facing the center. Baffles are formed in it by the material that sets in during commissioning.
  • a rotor 2 driven by the motor 3 is arranged in the housing 1 so as to be rotatable about a vertical axis 8, an annular gap 6 remaining through the rotor 2 and the housing 1, through which the shredded material falls downward to the outlet opening.
  • the rotor 2 has a base plate 9, a cover plate 10 and vanes 11 arranged between them, the cover plate 10 being provided with a central opening through which the material to be shredded, which is fed in via the filling opening 4, into the interior of the rotor 2 arrives.
  • a baffle plate 7 which distributes the material to be shredded, which accelerates in the rotor 2 with the help of the vanes 11 and is finally thrown out through outlet openings 16 onto the baffle surfaces of the housing 1 and is thereby broken.
  • a circumferential rotor speed of 60-72 m / s is preferably selected.
  • the rotor 2 is provided with three vanes 11, which essentially extend in the circumferential direction while leaving a central area the size of the baffle plate 7.
  • Each wing 11 is made from a three-sided part with the circumference correspondingly curved outside and inside, each inside of two wings 11 defining an ejection channel that narrows towards the outlet opening 16.
  • One of the two inner sides is concave, so that a material receiving pocket 17 is formed, in which material accumulates at the beginning of the shredding process, the surface of which forms an impact surface, thereby protecting the wing 11 from damage.
  • a contact plane B of the two edge edges of the material receiving pocket 17, in which, due to the rotor rotation, forms a material surface following a curved line 27, preferably extends essentially tangentially to the baffle plate 7 and closes with an axial plane A or a radius of the rotor (FIG. 3) an angle of preferably 35 °.
  • an exchangeable wear part protruding beyond the rotor circumference which consists of a steel carrier body 12 fastened to the wing 11 and a low-wear hard metal strip 13, especially of the type B 10 T with a tungsten carbide content of 94%, a Vickers hardness of 1450 HV and a tungsten carbide grain size between 0.002 and 0.004 mm.
  • the circumferential parts of the wings are protected by the wear parts projecting beyond the rotor circumference, so that the armor to be provided there can be given thinner.
  • Fig. 3 the end of a wing 11 equipped with the wear body is shown in detail.
  • the carrier body 12, which is fastened to the wing end by means of screws 14, has, for example, the essentially plate-shaped configuration shown.
  • the hard metal strip 13 represents part of a circular area in cross section and has an outer, circular arc-shaped wear surface 21, a inner surface 20, which forms the inner surface of the material receiving pocket 17, and a mounting surface 22, which bears against a bevelled support surface of the carrier body 12. Its height can also be divided into several sections.
  • the hard metal strip 13 is fastened to the end of the carrier body 18, in particular soldered on, in such a way that the tangent to the wear surface 21 and the tear-off edge 24 is approximately in the contact plane B, and the inner surface 20 at an angle between 90 ° and 105 °, preferably 95 °, to the plane of contact B.
  • the width of the inner surface 20 is approximately two thirds of the radius of curvature of the wear surface 21.
  • the width of the mounting surface 22 corresponds approximately to the length of the radius of curvature, and the mounting surface 22 and the inner surface 20 close an angle between 100 ° and 115 °, preferably of 105 ° a.
  • the wearing part is thus L-shaped overall, the shorter leg being formed by the hard metal strip 13 and the longer leg being formed by the carrier body 12, and both enclosing an angle of preferably 95 ° to 110 °, preferably 105 °.
  • the overall arrangement of the wearing part is preferably such that the miter plane of the wearing part lies in an axial plane A.

Claims (6)

  1. Broyeur à impact pour concasser des roches ou analogues, avec un boîtier (1) sensiblement annulaire avec des surfaces d'impact faisant face vers l'intérieur, et avec un rotor (2) disposé sur un arbre vertical d'entraînement en formant une fente annulaire (6) par rapport au boîtier (1) avec une ouverture d'entrée axiale (4), ce broyeur présentant une plaque de fond (9) avec un disque central d'impact (7), une plaque de recouvrement (10) avec un évidement central et des palettes (11) formant des ouvertures d'éjection (16) entre la plaque de fond (9) et la plaque de recouvrement (10), les faces des palettes orientées vers l'axe (8) du rotor étant chacune munie d'une poche (17) pour recueillir la matière broyée, une pièce d'usure interchangeable sensiblement en forme de L étant disposée sur le côté d'éjection de la poche (17) et étant constituée d'un corps porteur (12) et d'une barre (13) en métal dur, ladite pièce d'usure constituant une armature des bords d'usure et présentant une surface interne (20) sensiblement perpendiculaire à un plan (B) tangent aux bords périphériques des poches (17) collectrices de la matière broyée,
    caractérisé en ce que la barre (13) en métal dur, qui est constituée de préférence d'un alliage contenant plus de 91% de carbure de tungstène, le reste étant essentiellement du cobalt, présente une surface d'usure (21) convexe en forme d'arc de cercle, saillante vers l'arrière à partir du bord d'usure (24) dans le sens de l'éjection, et un bord extérieur faisant saillie au-delà de la périphérie du rotor.
  2. Broyeur à impact selon la revendication 1, caractérisé en ce que la surface d'usure (21) en forme d'arc de cercle s'étend sur un quart de cercle.
  3. Broyeur à impact selon la revendication 1, caractérisé en ce que la surface interne (20) de la barre (13) en métal dur située dans la poche collectrice (17) de la matière forme un angle (∝) d'environ 95° avec le plan de tangence (B).
  4. Broyeur à impact selon la revendication 3, caractérisé en ce que la surface interne (20) et une surface de montage (22) de la barre (13) en métal dur, reposant sur le corps porteur (12), forment entre elles un angle de 105°.
  5. Broyeur à impact selon la revendication 4, caractérisé en ce que le bord externe situé entre la surface d'usure (21) et la surface de montage (22) est arrondi.
  6. Broyeur à impact selon une des revendications 1 à 5, caractérisé en ce que le corps porteur (12) est essentiellement en forme de plaque et présente une surface d'appui biseautée pour la surface de montage (22) de la barre (13) en métal dur.
EP87102358A 1986-10-30 1987-02-19 Broyeur à impact pour le broyage de roches ou semblables Expired - Lifetime EP0265580B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2882/86 1986-10-30
AT0288286A AT390568B (de) 1986-10-30 1986-10-30 Prallmuehle zum zerkleinern von gestein od. dgl.

Publications (3)

Publication Number Publication Date
EP0265580A2 EP0265580A2 (fr) 1988-05-04
EP0265580A3 EP0265580A3 (en) 1989-01-25
EP0265580B1 true EP0265580B1 (fr) 1991-04-24

Family

ID=3541797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102358A Expired - Lifetime EP0265580B1 (fr) 1986-10-30 1987-02-19 Broyeur à impact pour le broyage de roches ou semblables

Country Status (6)

Country Link
EP (1) EP0265580B1 (fr)
AT (2) AT390568B (fr)
AU (1) AU593401B2 (fr)
DE (2) DE8630185U1 (fr)
GB (1) GB2198060B (fr)
HU (2) HUT48131A (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610217B1 (fr) * 1987-01-30 1991-08-16 Alsthom Concasseur rotatif a aubes de projection autoprotegees
US4940188A (en) * 1987-12-24 1990-07-10 John Rodriguez Tip holder for mineral breaker
JPH0783837B2 (ja) * 1988-12-05 1995-09-13 コトブキ技研工業株式会社 遠心破砕機とその破砕方法及び破砕片の仕分け方法
DE8903501U1 (fr) * 1989-03-21 1989-05-11 Sbm Wageneder Ges.M.B.H., Laakirchen, Oberoesterreich, At
DK165090D0 (da) * 1990-07-09 1990-07-09 Kem En Tec As Konglomererede partikler
JP2766058B2 (ja) * 1990-08-31 1998-06-18 株式会社神戸製鋼所 竪型衝撃式破砕機
CA2061255A1 (fr) * 1991-02-15 1992-08-16 Ronald Frederick Bourne Traitement de matieres particulaires
US5137220A (en) * 1991-04-04 1992-08-11 Canica Crushers, Inc. Mounting apparatus for impeller for a centrifugal impact crusher
NZ250027A (en) * 1993-10-22 1996-10-28 Barmac Ass Ltd Mineral breaker; scalloped wear tip
DE4338331A1 (de) * 1993-11-10 1995-05-11 Braun Ernst Schlagkopfbrecher
US5860605A (en) 1996-10-11 1999-01-19 Johannes Petrus Andreas Josephus Van Der Zanden Method and device for synchronously making material collide
NZ502725A (en) * 2000-02-07 2002-10-25 Svedala Barmac Ltd Rotary mineral breaker of autogenous type with contoured backing region leading to exit port on rotor
CN103949305B (zh) * 2014-05-13 2015-12-02 济南大学 一种破碎机的新型转子
CN109261292A (zh) * 2018-10-31 2019-01-25 郑州市正升重工科技有限公司 一种高效制砂机转子
CN110270410A (zh) * 2019-06-19 2019-09-24 枣庄鑫金山智能机械股份有限公司 一种制砂机抛料头

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174697A (en) * 1962-07-30 1965-03-23 Adams Engineering Impeller
US4090673A (en) * 1977-02-18 1978-05-23 Canica Crushers Ltd. Centrifugal impact rock crushers
NZ201190A (en) * 1982-08-07 1986-07-11 Barmac Ass Ltd Additional wear tip for rotary mineral breaker
AU3535884A (en) * 1983-11-18 1985-05-23 Acrowood Corporation Centrifugal impact crusher
US4560113A (en) * 1984-06-27 1985-12-24 Rexnord Inc. Convertible vertical shaft impact crusher
YU185685A (en) * 1984-12-04 1987-12-31 Wageneder Sbm Gmbh Hammer mill for crushing minerals and similar materials
DE3610974A1 (de) * 1986-04-02 1987-10-08 Bhs Bayerische Berg Horizontal-schleudermuehle, insbesondere zum zerkleinern von abrasivem gestein

Also Published As

Publication number Publication date
HUT48131A (en) 1989-05-29
HU198860B (en) 1989-12-28
DE3769584D1 (de) 1991-05-29
AU8052787A (en) 1988-05-05
DE8630185U1 (fr) 1987-01-08
GB2198060B (en) 1991-06-26
ATE62831T1 (de) 1991-05-15
EP0265580A2 (fr) 1988-05-04
ATA288286A (de) 1989-11-15
GB2198060A (en) 1988-06-08
EP0265580A3 (en) 1989-01-25
GB8724831D0 (en) 1987-11-25
AU593401B2 (en) 1990-02-08
AT390568B (de) 1990-05-25

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