EP0388825B1 - Elément d'usure pour rotor de broyeur à impact - Google Patents
Elément d'usure pour rotor de broyeur à impact Download PDFInfo
- Publication number
- EP0388825B1 EP0388825B1 EP90105084A EP90105084A EP0388825B1 EP 0388825 B1 EP0388825 B1 EP 0388825B1 EP 90105084 A EP90105084 A EP 90105084A EP 90105084 A EP90105084 A EP 90105084A EP 0388825 B1 EP0388825 B1 EP 0388825B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- face
- wearing
- carrier body
- hard metal
- member 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.)
- Expired - Lifetime
Links
Images
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-U-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.
- a contact plane B of the two edge edges of the material receiving pocket 17, in which a material surface following a curved line 27 is formed due to the rotor rotation, preferably also represents a tangential plane to the baffle plate 7.
- the protruding over the rotor circumference is arranged, which consists of a support body 12 which can be fastened to the wing 11 and made of steel and a low-wear hard metal strip 13, especially of the B 10 T type 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 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.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
- Crushing And Grinding (AREA)
Claims (6)
- Pièce d'usure échangeable (12, 13) pour le rotor d'un broyeur à chocs, qui est disposé dans un carter approximativement annulaire et est pourvu d'une ouverture d'admission axiale et d'ouvertures d'évacuation formées à la périphérie, la pièce d'usure échangeable (12, 13) ayant approximativement la forme d'un L et sa branche longue étant définie par un corps de support (12) sensiblement en forme de plaque tandis que sa branche courte (13) est définie par une bande de métal dur servant d'armature des ouvertures d'évacuation et qui se compose d'un alliage contenant une proportion de carbure de tungstène supérieure à 91 % et, pour le reste, essentiellement du cobalt, et définit une surface d'usure (21) en retrait dans le sens d'évacuation, caractérisée en ce que la bande de métal dur (13) est conçue comme un prisme pentagonal, une première et une seconde section (25, 26) de la surface d'usure (21) se rejoignant en une arête de rupture (24) en définissant un angle interne d'environ 125°.
- Pièce d'usure selon la revendication 1, caractérisée en ce que la seconde section (26) et une troisième section (28) de la surface d'usure (21) définissent un angle interne de 110°.
- Pièce d'usure selon la revendication 2, caractérisée en ce que la troisième section (28) se la surface d'usure (21) et une surface (22) de montage sur le corps de support (12) définissent un angle interne de 100°.
- Pièce d'usure selon l'une des revendications 1 à 3, caractérisée en ce que la surface interne (20) de la bande de métal dur (13) voisine du corps de support (12) s'étend sensiblement perpendiculairement à la première section (25) de la surface d'usure.
- Pièce d'usure selon les revendications 3 et 4, caractérisée en ce que la surface interne (20) de la bande de métal dur (13) et la surface (22) de montage sur le corps de support (12) définissent un angle interne de 115°.
- Pièce d'usure selon l'une des revendications 1 à 5, caractérisée en ce que le corps de support (12) sensiblement en forme de plaque comporte une surface d'appui, biseautée à 40°, pour la surface de montage (22) de la bande de métal dur (13) dont la surface interne (20) définit, avec la surface latérale voisine (23) de la bande de support (12), un angle de 105°.
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 | 1989-03-21 | ||
DE8903501U DE8903501U1 (de) | 1989-03-21 | 1989-03-21 | Verschleißteil für einen Prallmühlenrotor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0388825A2 EP0388825A2 (fr) | 1990-09-26 |
EP0388825A3 EP0388825A3 (en) | 1990-12-19 |
EP0388825B1 true 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) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997013088A1 (fr) * | 1995-10-06 | 1997-04-10 | Technical Concepts L.P. | Soupape de chasse automatique |
SE523598C3 (sv) * | 2002-08-28 | 2004-06-09 | Sandvik Ab | Hållare för en slitdel i en kross |
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 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT381246B (de) * | 1984-12-04 | 1986-09-10 | Wageneder Sbm Gmbh | Prallmuehle zum zerkleinern von gestein od.dgl. |
AT390568B (de) * | 1986-10-30 | 1990-05-25 | Wageneder Sbm Gmbh | Prallmuehle zum zerkleinern von gestein od. dgl. |
-
1989
- 1989-03-21 DE DE8903501U patent/DE8903501U1/de not_active Expired
-
1990
- 1990-03-17 EP EP90105084A patent/EP0388825B1/fr not_active Expired - Lifetime
- 1990-03-17 AT AT90105084T patent/ATE90885T1/de not_active IP Right Cessation
- 1990-03-17 DE DE9090105084T patent/DE59001824D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0388825A2 (fr) | 1990-09-26 |
DE59001824D1 (de) | 1993-07-29 |
ATE90885T1 (de) | 1993-07-15 |
EP0388825A3 (en) | 1990-12-19 |
DE8903501U1 (de) | 1989-05-11 |
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