EP0388825A2 - Elément d'usure pour rotor de broyeur à impact - Google Patents

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

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Publication number
EP0388825A2
EP0388825A2 EP90105084A EP90105084A EP0388825A2 EP 0388825 A2 EP0388825 A2 EP 0388825A2 EP 90105084 A EP90105084 A EP 90105084A EP 90105084 A EP90105084 A EP 90105084A EP 0388825 A2 EP0388825 A2 EP 0388825A2
Authority
EP
European Patent Office
Prior art keywords
wear
section
carrier body
hard metal
approximately
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
EP90105084A
Other languages
German (de)
English (en)
Other versions
EP0388825B1 (fr
EP0388825A3 (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
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 AT90105084T priority Critical patent/ATE90885T1/de
Publication of EP0388825A2 publication Critical patent/EP0388825A2/fr
Publication of EP0388825A3 publication Critical patent/EP0388825A3/de
Application granted granted Critical
Publication of EP0388825B1 publication Critical patent/EP0388825B1/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 interchangeable wear part for the rotor of an impact mill, which is arranged in an approximately ring-shaped housing and is provided with an axial inlet opening and with ejection openings formed on the circumference, the interchangeable wear part being approximately L-shaped, the longer leg of which is formed by a essentially plate-shaped carrier body and its shorter leg is formed by a hard metal strip as a chute reinforcement, which preferably consists of an alloy with a tungsten carbide content of over 91%, the rest essentially cobalt, and forms a wear surface that recoils in the direction of ejection.
  • Such a replaceable wear part can be found, for example, in DE-Gb 8 630 185.
  • the wearing part has a hard metal strip, which corresponds approximately to a quarter or third circle, the wearing surface having a satisfactory service life and a favorable, fairly uniform wear when comminuting crushed material in the usual composition.
  • crushed material with a high proportion of fines leads to less favorable wear, so that the innovation has set itself the task of creating a wear part whose hard metal strip also leads to good results in this case, that is to say a satisfactorily long service life.
  • the hard metal strip is designed as a pentagonal prism, a first and a second section of the wear surface abutting one another in a tear-off edge at an internal angle of approximately 125 °.
  • a major cause is likely to be the level design of the two sections of the wear surface that are significantly subject to wear, the aspect ratio of which is preferably between 1: 4 and 1: 5.
  • the second and a third section of the wear surface lying outside the rotor circumference preferably form an angle of 110 ° with one another, the length of the third section being in particular essentially the same as that of the first section.
  • the surface of the hard metal strip adjoining the carrier body preferably extends essentially perpendicular to the first section of the wear surface and delimits a material receiving pocket formed in the rotor.
  • the angle between the surface adjoining the carrier body and the mounting surface or soldering surface to the carrier body is 115 °, the counter surface or supporting surface of the carrier body being in particular beveled at 40 ° to the carrier body.
  • the rotor 2 of an impact mill is arranged in an annular housing, in which impact surfaces are formed due to the material that has set up.
  • the rotor 2 has a bottom plate 9, a cover plate, not shown, and wings 11 arranged between them, a central opening being provided in the cover plate through which the material to be comminuted enters the rotor 2.
  • Below the opening in the cover plate there is a conical or truncated cone-shaped impact body 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 impact surfaces of the housing 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 extend substantially in the circumferential direction, leaving a central region the size of the impact body 7.
  • Each wing 11 consists of 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 also forms an impact surface, thereby protecting the wing 11 from damage.
  • 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 thinly.
  • the carrier body 12 which can be fastened to the wing end by means of screws 14, has, for example, the essentially plate-shaped configuration shown.
  • the hard metal strip 13 is designed in the form of a pentagonal prism, and has an outer wear surface 21 consisting of three sections 25, 26, 28, an inner surface 20 forming the inner surface of the material-receiving pocket 17 and a mounting surface 22 which is at an angle below 40 ° bevelled support surface of the support body 12 abuts.
  • the height of the hard metal strip 13 can also be divided into several sections.
  • the hard metal strip 13 is fastened to the end of the carrier body 12, in particular soldered on, in such a way that the first section 25 of the wear surface 21 lies approximately in the abovementioned contact plane B and forms an angle of 125 ° with the second section 26, the two sections 25, 26 meet in the tear-off edge 24.
  • the inner surface 20 extends to the first section 25 at an angle of approximately 90 ° and to the mounting surface 22 with which the hard metal strip 13 rests on the carrier body 12 at an angle of 115 °.
  • a third section 28 of the wear surface 21 adjoins the second section 26 at an angle of 110 °.
  • the mounting surface 22 and the third section 28 of the wear surface 21 enclose an angle of 100 °.
  • the respective Lengths of the mounting surface 22 and the inner surface 20 or the first and third sections 25, 28 of the wear surface 21 are substantially the same.
  • the inner surface 20 of the hard metal strip 13 and the adjoining side surface 23 of the plate-shaped carrier body 12 are at an angle of approximately 105 ° to one another, so that the wearing part is thus L-shaped overall, the shorter leg through the hard metal strip 13 and the longer leg through the Carrier body 12 is formed.
  • the overall arrangement of the wearing part is preferably such that an axial plane A of the rotor 2 includes an angle of approximately 25 ° to 30 ° through the tear-off edge 24 with the first section 25.
EP90105084A 1989-03-21 1990-03-17 Elément d'usure pour rotor de broyeur à impact Expired - Lifetime EP0388825B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90105084T ATE90885T1 (de) 1989-03-21 1990-03-17 Verschleissteil fuer einen prallmuehlenrotor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8903501U DE8903501U1 (fr) 1989-03-21 1989-03-21
DE8903501U 1989-03-21

Publications (3)

Publication Number Publication Date
EP0388825A2 true EP0388825A2 (fr) 1990-09-26
EP0388825A3 EP0388825A3 (en) 1990-12-19
EP0388825B1 EP0388825B1 (fr) 1993-06-23

Family

ID=6837352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105084A Expired - Lifetime EP0388825B1 (fr) 1989-03-21 1990-03-17 Elément d'usure pour rotor de broyeur à impact

Country Status (3)

Country Link
EP (1) EP0388825B1 (fr)
AT (1) ATE90885T1 (fr)
DE (2) DE8903501U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013088A1 (fr) * 1995-10-06 1997-04-10 Technical Concepts L.P. Soupape de chasse automatique
US7257876B2 (en) * 2002-08-28 2007-08-21 Sandvik Intellectual Property Ab Holder for a wear part of a crusher
CN112264149A (zh) * 2020-11-19 2021-01-26 何俊民 一种冲击式制砂机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574000A1 (fr) * 1984-12-04 1986-06-06 Wageneder Sbm Gmbh Concasseur pour broyer des roches ou materiaux similaires
EP0265580A2 (fr) * 1986-10-30 1988-05-04 SBM WAGENEDER Gesellschaft m.b.H. Broyeur à impact pour le broyage de roches ou semblables

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574000A1 (fr) * 1984-12-04 1986-06-06 Wageneder Sbm Gmbh Concasseur pour broyer des roches ou materiaux similaires
EP0265580A2 (fr) * 1986-10-30 1988-05-04 SBM WAGENEDER Gesellschaft m.b.H. Broyeur à impact pour le broyage de roches ou semblables

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013088A1 (fr) * 1995-10-06 1997-04-10 Technical Concepts L.P. Soupape de chasse automatique
US7257876B2 (en) * 2002-08-28 2007-08-21 Sandvik Intellectual Property Ab Holder for a wear part of a crusher
CN100351018C (zh) * 2002-08-28 2007-11-28 山特维克知识产权股份有限公司 用于粉碎机磨损部件的支架
CN112264149A (zh) * 2020-11-19 2021-01-26 何俊民 一种冲击式制砂机
CN112264149B (zh) * 2020-11-19 2021-12-14 贵州固鑫新材料有限公司 一种冲击式制砂机

Also Published As

Publication number Publication date
EP0388825B1 (fr) 1993-06-23
EP0388825A3 (en) 1990-12-19
DE59001824D1 (de) 1993-07-29
DE8903501U1 (fr) 1989-05-11
ATE90885T1 (de) 1993-07-15

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