EP3852931B1 - Capuchon protecteur et rotor pour un dispositif de broyage pour pièces métalliques et matières de pierre en étant équipé - Google Patents

Capuchon protecteur et rotor pour un dispositif de broyage pour pièces métalliques et matières de pierre en étant équipé Download PDF

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Publication number
EP3852931B1
EP3852931B1 EP18778417.8A EP18778417A EP3852931B1 EP 3852931 B1 EP3852931 B1 EP 3852931B1 EP 18778417 A EP18778417 A EP 18778417A EP 3852931 B1 EP3852931 B1 EP 3852931B1
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EP
European Patent Office
Prior art keywords
section
protective caps
rotor
dsn
thickening
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.)
Active
Application number
EP18778417.8A
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German (de)
English (en)
Other versions
EP3852931C0 (fr
EP3852931A1 (fr
Inventor
Carsten JUNGE
Bruno Mayer
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.)
Stahlwerke Bochum AG
Original Assignee
Stahlwerke Bochum AG
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 Stahlwerke Bochum AG filed Critical Stahlwerke Bochum AG
Priority to PL18778417.8T priority Critical patent/PL3852931T3/pl
Publication of EP3852931A1 publication Critical patent/EP3852931A1/fr
Application granted granted Critical
Publication of EP3852931C0 publication Critical patent/EP3852931C0/fr
Publication of EP3852931B1 publication Critical patent/EP3852931B1/fr
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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
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/04—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters hinged to the rotor; Hammer mills
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like

Definitions

  • the invention relates to a rotor for crushing metal objects or rock materials, which is equipped with protective caps.
  • protective caps and rotors equipped with them are typically used in so-called “shredders”, which are used to crush metal scrap, such as vehicle bodies to be scrapped, or demolition or construction waste.
  • the rotor In its peripheral areas between the impact hammers, the rotor is fitted with protective caps of the type in question, which in technical terms are also called "rotor caps".
  • the protective caps are made of steel, like the impact hammers, and are mainly manufactured by casting, but alternatively also by forging, flame cutting or as welded constructions.
  • the protective caps serve as an impact surface for fragments of the material to be shredded. At the same time, they protect the internal moving parts of the rotor. In order to fulfil this dual function, they must be very stable, but must not have an excessive volume in order not to overload the rotor with excessive weight and the dynamic forces that this creates during operation.
  • protective caps of the type in question have a bearing section into which a bearing opening is formed, into which a bearing axle can be inserted for fastening the protective cap to the rotor.
  • the bearing section carries a roof-like rim section. This has an end face facing away from the bearing section with a striking surface which, during use, is exposed to a striking load caused by pieces of the material to be shredded hitting it.
  • the rim section has two long sides, which are arranged at a distance from one another which corresponds to the width of the rim section measured parallel to the longitudinal axis of the bearing opening, and which protrude laterally beyond the bearing section, as well as two narrow sides, one of which is at one of the narrow ends of the rim section extends between the long sides. When new, the rim section has a nominal thickness at least on its narrow sides.
  • the protective caps arranged next to the impact hammers are mounted at such a distance from the respective impact hammer that, on the one hand, the impact hammer can carry out its pendulum movement freely, but on the other hand, the gap that must be present between the respective protective cap and the associated impact hammer in order to prevent its pendulum movement enable it to be as narrow as possible during the During operation, metal or stone parts are prevented from entering the gap in question and the hammer from being blocked by material sitting in the gap.
  • the invention has solved this problem by a rotor for a machine for shredding metal or rock materials, in particular scrap, such as automobile bodies to be scrapped, or residual rock masses from building construction or demolition, which has at least the features specified in claim 1.
  • a protective cap for a rotor according to the invention for shredding Metal objects or rock materials thus have a bearing section in which a bearing opening is formed, into which a bearing axle is inserted for fastening the protective cap to the rotor, and a roof-like rim section carried by the bearing section, which has an end face facing away from the bearing section with a striking surface , which during use is exposed to a striking load due to pieces of the material to be shredded hitting it, two longitudinal sides which are arranged at a distance from one another which corresponds to the width of the rim section measured parallel to the longitudinal axis of the bearing opening, and which protrude laterally beyond the bearing section , and has two narrow sides, one of which extends at one of the narrow ends of the rim section between the long sides, the rim section having a nominal thickness DSN at least on its narrow sides when new.
  • the bearing section of a protective cap of the type according to the invention thus carries the rim section in the manner of a roof, which protrudes beyond the bearing section at least on its long sides, so that the width of the rim section is significantly larger than that of the bearing section.
  • the bearing section can of course be widened in a manner known per se in the area of the bearing eye in order to be able to safely absorb the loads that occur there during use.
  • narrow ribs or the like can be formed on the bearing section in a known manner, which serve to stiffen the protective cap as a whole or to optimally support the rim section.
  • a protective cap is now characterized in that an outwardly projecting thickening section is formed on the front side of its rim section, which adjoins at least one of the longitudinal sides and has a thickness DVM that is greater than the nominal thickness DSN of the rim section.
  • the thickening section is thus designed and arranged on the front side of the rim section in such a way that when mounted on a rotor according to the invention, it can be mounted in the closest proximity to the impact hammer.
  • the invention therefore makes it possible in a very simple manner to match the service life of even those protective caps that are arranged in the immediate vicinity of a pendulum-mounted impact hammer on a rotor for a machine for shredding scrap or rock materials and the like to the service life of the remaining protective caps of the rotor to adapt.
  • the time intervals that elapse between the replacement of the protective caps are standardized in such a way that, within a technically always unavoidable tolerance range, all protective caps regularly reach a state of wear in which they must be replaced together.
  • the thickened area extends over the entire width of the rim section.
  • the thickening section extends from the long side to which it is adjacent over a maximum of three quarters of the width of the rim section, with the rim section then having a nominal thickness in an area that borders on the long side that is opposite the long side to which the thickening section is adjacent.
  • An extension of the thickening section limited to a partial area of the width of the rim section also has the advantage that, in the case of a rotor according to the invention, on its long side, where the nominal thickness is present, a seamless transition can be produced between the protective cap according to the invention and a conventionally designed protective cap arranged next to the relevant long side of the protective cap according to the invention.
  • nominal thickness refers to the thickness in the unworn new condition, i.e. the thickness that the relevant area or section of the rim section has when the protective cap according to the invention is newly mounted on the rotor of a shredder or a comparable shredding machine.
  • the width extension of the thickening section in the same way as the width extension of the thickening section, its optimal extension in the circumferential direction of the rim section, ie in a direction aligned along the long sides of the rim section, can also be determined empirically by observing the wear of conventional protective caps. This has shown that the Thickening section advantageously extends over not more than nine tenths and not less than two tenths of the circumferential length of the rim section measured in the circumferential direction of the rim section.
  • the extension of the service life of a protective cap achieved according to the invention is achieved here in particular in that the region of greatest thickness of the thickening section of the protective caps according to the invention in a rotor according to the invention covers the angular range that the respective impact tool covers during its pendulum movement during operation.
  • the required thickness of the thickening section can also be determined empirically by observing the wear of conventionally designed protective caps. Experience shows here that even with particularly heavy wear, a sufficient wear volume is provided in the thickening section of the rim section provided according to the invention, if for this from the maximum thickness DVM, which the thickening section has in addition to the nominal thickness DSN of the protective cap on the narrow sides of its rim section, and the nominal thickness DSN formed ratio DVM:DSN is 1:10 ⁇ DVM:DSN ⁇ 1:1.
  • the protective caps according to the invention arranged in the area of the rotor particularly susceptible to wear do not reach the end of their service life until the other conventional protective caps of the rotor also have to be replaced.
  • the thickening section can be applied to the front of the rim section in a separate operation after the protective cap has been manufactured. Any application method that allows the subsequent application of sufficiently wear-resistant material in sufficient thickness and distribution is conceivable. It is also possible to attach an appropriately shaped sheet metal blank or similar to the front of the rim section by welding.
  • protective caps according to the invention can be produced in a particularly simple and economical way by producing them in one piece from an iron-based cast material.
  • Typical steel materials from which protective caps designed according to the invention are made are martensitic tempering steels with carbon contents of 0.1 - 0.70 wt.%, which are already used for this purpose.
  • Protective caps according to the invention can also be produced from austenitic tempering steels with manganese contents of 7 - 30 wt.%.
  • These types of steel, known as "Hadfield steels” have also proven themselves in practice for many years for the production of protective caps of the type in question.
  • An example of such a Hadfield steel is the steel commercially available under the standard designation X120Mn12 and the material number 1.3401.
  • protective caps according to the invention can be cast from iron cast materials known for this purpose, for example from so-called “white cast iron", which has chromium contents of up to 29% by weight. It is also possible to manufacture the protective caps according to the invention from sheet steel in a welded construction. The rim section is reinforced by build-up welding or by welding on a correspondingly prefabricated reinforcement module made of sheet steel.
  • the thickening section provided according to the invention can be arranged in relation to the bearing section of the protective cap in such a way that it can optimally fulfill its protective function.
  • an asymmetrical or symmetrical arrangement of the thickening section based on the longitudinal side view of the protective cap is suitable for this.
  • a protective cap according to the invention is also designed to be mirror-symmetrical in terms of the arrangement and extent of its thickened section when viewed from the long side.
  • This design has the particular advantage that only one type of protective cap according to the invention is required to equip a rotor with protective caps according to the invention on both sides of a percussion hammer, even if the thickened section does not extend over the entire width of the rim section.
  • the protective caps can be aligned by simply turning them so that the side of their long side to which the thickened section adjoins is assigned to the percussion hammer in question.
  • the Figures 1 - 2 The protective caps 1,1' shown are each made in one piece from a cast steel material commonly used in the state of the art.
  • the protective caps 1,1' are shown in the longitudinal side view ( Figures 1 , 3 ) are each mirror-symmetrical and have a bearing section 2,2', which carries a rim section 3,3' curved in the manner of a barrel roof.
  • the bearing section 2,2' has a wider central region 4,4', to which two support ribs 6,6',7,7' are connected, one of which extends from one of the transverse sides of the central region 4,4' in the longitudinal direction L of the protective cap 1,1' and is centrally located in relation to the respective transverse side of the central region 4,4'.
  • the support ribs 6,6',7,7' have a significantly smaller width BR than the central area 4,4' and the rim section 3,3'.
  • a bearing opening 8.8' is formed at a central location in the central region 4,4' of the bearing section 2,2', which extends transversely to the support ribs 6,6',7,7' through the central region 4,4' and a Axis X is defined, parallel to which the width dimensions specified here are measured.
  • the rim section 3,3' protrudes laterally over the bearing section 2,2' on both sides with its long sides 9,9', 10,10' in the width direction B and is at its ends in the longitudinal direction L through narrow sides 11,11',12,12 'limited, one of which connects the associated ends of the long sides 9,9', 10,10' to one another.
  • the rim section 3,3' has a nominal thickness DSN measured in the radial direction R with respect to the curvature of the rim section 3,3'.
  • the protective caps 1,1' each have a thickening section 15,15' on the front side 13,13' of their rim sections 3,3', in which the rim section 3,3' is thickened in addition to the nominal thickness DSN by a thickness DVM, also measured in the radial direction R, not shown to scale here for clarity.
  • the ratio DVM:DSN is typically 1:5 - 4:5.
  • the thickening section 15 extends in the longitudinal direction L over approximately nine tenths of the circumferential length UL of the rim section 3 and in the width direction B over its entire width BF.
  • the thickening section 15 is rounded off in a throat-like manner at its ends associated with the narrow sides 11, 12 into the respective End section 16,17, so that a seamless transition is formed between the maximum thickness DVM of the thickening region 15 and the nominal thickness DSN of the rim section 3 given in the region of the end sections 16,17. Outside the transition region, the thickness of the thickening region 15 in the new state constantly corresponds to the maximum thickness DVM.
  • the thickening section 15' only extends over approximately six tenths of the circumferential length UL of the rim section 3', with its ends assigned to the narrow sides 11', 12' being longer, each over approximately one tenth
  • the transition extending from the circumferential length UL merges into the respective end section 16', 17', in which the rim section 3' of the protective cap 1' has a nominal thickness of DSN when new.
  • the maximum thickness DVM is present in the protective cap 1' in a central area of the thickening section 15', which takes up approximately four tenths of the circumferential length UL.
  • the thickening section 15' extends from its one long side 10' only over approximately two thirds of the width BF of the rim section 3'.
  • the maximum thickness DVM starting from the long side 10', is only over approximately half of the width BF.
  • the thickening section 15 'in the width direction B merges in a groove-like, rounded transition into the longitudinal side region 18' of the rim section 3' of the protective cap 1' adjacent to the other long side 9', in which the nominal thickness DSN is present .
  • a rotor 100 which is basically constructed like a conventional rotor, for a machine (not shown here) for shredding automobile bodies or the like has three axes 102 - 104 distributed at equal angular distances around a central rotor axis 101, on each of which a conventional type impact hammer 105 - 107 is mounted in an oscillating manner is.
  • the rotor 100 also carries protective caps 108, which lie close together on the rotor 100 outside the movement range 109 covered by the respective impact hammer 105 - 107 during its pendulum movement sit.
  • the protective caps which are arranged to the right and left of the respective movement range 109 as seen in the longitudinal direction LX of the rotor axis 101 and delimit it on its long side, are each corresponding to the ones shown in FIGS Figures 3 and 4 shown protective cap 1 ', whereas the other protective caps 108 of the rotor 100 are designed in a conventional design, ie have a shape that corresponds to the shape of the protective cap 1', but without the thickening section 15 '.
  • the protective caps 1' laterally delimiting the movement areas 109 are oriented with their long sides 10', to which their thickened section 15' is adjacent, towards the respective impact hammer 105 - 107. In this way, the impact hammers 105 - 107 swing along the thickest area of the thickened section 15' during use.
  • Protective caps designed according to the protective caps 1 shown can be used, for example, on rotors in which a protective cap and a percussion hammer are mounted on the rotor in alternating sequence in the longitudinal direction LX, so that during use a percussion hammer oscillates along both long sides 9, 10 of the protective caps 1.

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

Claims (9)

  1. Rotor (100) pour une machine de broyage d'objets métalliques ou de matériaux rocheux comprenant au moins deux capuchons de protection (1, 1') montés de manière fixe sur le rotor (100) et un outil de frappe (105-107) qui est agencé entre les capuchons de protection (1') et logé de manière pendulaire sur le rotor (100), les capuchons de protection (1, 1') comportant une section de palier (2, 2') dans laquelle est moulée une ouverture de palier (8, 8') dans laquelle est inséré un axe de palier destiné à fixer le capuchon de protection (1, 1') sur le rotor (100), et une section de jante (3, 3') conçue en forme de toit et portée par la section de palier (2, 2') qui comprend une face frontale (13, 13') opposée à la section de palier (2, 2') avec une surface de frappe (14, 14') qui, en cours d'utilisation, est soumise à une sollicitation par frappe par des morceaux de matériau à broyer qui la frappent, deux côtés longitudinaux (9, 9', 10, 10') qui sont agencés à une distance l'un de l'autre correspondant à la largeur (BF) de la section de jante (3, 3'), mesurée parallèlement à l'axe longitudinal (X) de l'ouverture de palier (8, 8'), et qui font saillie latéralement, au-delà de la section de palier (2, 2'), ainsi que deux côtés étroits (11, 11', 12, 12'), dont l'un s'étend respectivement à l'une des extrémités étroites de la section de jante (3, 3'), entre les côtés longitudinaux (9, 9', 10, 10'), ce même côté longitudinal (10') des capuchons de protection (1, 1') étant respectivement orienté vers l'outil de frappe (105-107) auquel est adjacente la section d'épaississement (15, 15') des capuchons de protection (1, 1'),
    caractérisé en ce que
    - la section de jante (3, 3') des capuchons de protection présente une épaisseur nominale (DSN) sur ses côtés étroits (11, 11', 12, 12') à l'état neuf,
    - une section d'épaississement (15, 15') dépassant vers l'extérieur est conçue sur la face frontale (13, 13') de la section de jante (3, 3'), cette section d'épaississement (15, 15') étant adjacente à au moins un des côtés longitudinaux (9, 9', 10, 10') et présentant une épaisseur (DVM) supérieure à l'épaisseur nominale (DSN) de la section de jante (3, 3'), et
    - la zone d'épaisseur maximale (DVM) de la section d'épaississement (15, 15') des capuchons de protection (1') recouvre la zone angulaire que l'outil de frappe (105-107) balaye, en cours de fonctionnement, lors de son mouvement pendulaire.
  2. Rotor selon la revendication 1, caractérisé en ce que, pour les capuchons de protection (1, 1'), la section d'épaississement (15') s'étend au maximum sur trois quarts de la largeur (BF) de la section de jante (3') et en ce que la section de jante (3') présente une épaisseur nominale (DSN) dans une zone latérale longitudinale (18') adjacente à celle du côté longitudinal (9') opposé au côté longitudinal (10') adjacent à la zone d'épaississement (15').
  3. Rotor selon l'une des revendications précédentes, caractérisé en ce que, pour les capuchons de protection (1, 1'), la section d'épaississement (15, 15') s'étend au maximum au-delà des neuf dixièmes de la longueur circonférentielle (UL) de la section de jante (3, 3'), mesurée dans la direction circonférentielle U de la section de jante (3, 3').
  4. Rotor selon l'une des revendications précédentes, caractérisé en ce que pour le rapport DVM : DSN, formé par l'épaisseur maximale DVM de la section d'épaississement par rapport à l'épaisseur nominale DSN des capuchons de protection (1, 1') sur les côtés étroits de leur section de jante (3, 3'), s'applique 1: 10 ≤ DVM : DSN ≤ 1: 1.
  5. Rotor selon la revendication 4, caractérisé en ce que le rapport DVM : DSN est au minimum de 1: 5 .
  6. Rotor selon l'une des revendications 4 ou 5, caractérisé en ce que le rapport DVM : DSN est au maximum de 4 : 5.
  7. Rotor selon l'une des revendications précédentes, caractérisé en ce que les capuchons de protection (1, 1') de la section d'épaississement (15, 15') passent sans à-coup dans la zone (16, 16', 17, 17', 18') étant adjacente présentant au moins une épaisseur nominale (DSN).
  8. Rotor selon l'une des revendications précédentes, caractérisé en ce que les capuchons de protection (1, 1') sont moulés d'une seule pièce à partir d'un matériau de moulage à base de fer.
  9. Rotor selon l'une des revendications précédentes, caractérisé en ce que les capuchons de protection (1, 1') sont conçus en symétrie miroir dans une vue latérale longitudinale.
EP18778417.8A 2018-09-20 2018-09-20 Capuchon protecteur et rotor pour un dispositif de broyage pour pièces métalliques et matières de pierre en étant équipé Active EP3852931B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18778417.8T PL3852931T3 (pl) 2018-09-20 2018-09-20 Kapa ochronna i wyposażony w niego wirnik maszyny do rozdrabniania przedmiotów metalowych albo materiałów skalnych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/075455 WO2020057744A1 (fr) 2018-09-20 2018-09-20 Capuchon de protection et rotor muni dudit capuchon pour une machine servant au broyage d'objets métalliques ou de matériaux rocheux

Publications (3)

Publication Number Publication Date
EP3852931A1 EP3852931A1 (fr) 2021-07-28
EP3852931C0 EP3852931C0 (fr) 2024-04-03
EP3852931B1 true EP3852931B1 (fr) 2024-04-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18778417.8A Active EP3852931B1 (fr) 2018-09-20 2018-09-20 Capuchon protecteur et rotor pour un dispositif de broyage pour pièces métalliques et matières de pierre en étant équipé

Country Status (4)

Country Link
EP (1) EP3852931B1 (fr)
ES (1) ES2980230T3 (fr)
PL (1) PL3852931T3 (fr)
WO (1) WO2020057744A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905492A1 (de) 1989-02-23 1990-08-30 Hoffmann Albert Kg Schutzschild fuer scheiben eines hammerbrecherrotors
DE4343801A1 (de) * 1993-12-22 1995-06-29 Lindemann Maschfab Gmbh Zerkleinerungsmaschine mit Rotor
DE19528512C2 (de) 1995-08-03 2001-02-22 Swb Stahlformgusgmbh Verschleißteile und Verfahren zu deren Herstellung
DE19756275C1 (de) 1997-12-18 1999-06-02 Svedala Lindemann Gmbh Rotor für eine Zerkleinerungsmaschine
ITUD20080152A1 (it) * 2008-06-26 2009-12-27 Danieli Davy Distington Ltd Dispositivo di triturazione per un impianto di triturazione
FR2956042A1 (fr) * 2010-02-05 2011-08-12 Jean Luc Mossotti Bloc de protection pour rotor de broyeur de materiau

Also Published As

Publication number Publication date
ES2980230T3 (es) 2024-09-30
EP3852931C0 (fr) 2024-04-03
EP3852931A1 (fr) 2021-07-28
WO2020057744A1 (fr) 2020-03-26
PL3852931T3 (pl) 2024-07-22

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