EP3852931A1 - Schutzkappe und damit ausgestatteter rotor für eine maschine zur zerkleinerung von metallgegenständen oder gesteinsmaterialien - Google Patents
Schutzkappe und damit ausgestatteter rotor für eine maschine zur zerkleinerung von metallgegenständen oder gesteinsmaterialienInfo
- Publication number
- EP3852931A1 EP3852931A1 EP18778417.8A EP18778417A EP3852931A1 EP 3852931 A1 EP3852931 A1 EP 3852931A1 EP 18778417 A EP18778417 A EP 18778417A EP 3852931 A1 EP3852931 A1 EP 3852931A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- protective cap
- rotor
- dsn
- rim
- 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
Links
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 protective cap for a rotor for crushing metal objects or rock materials.
- Protective caps of this type and rotors fitted with them are typically used in so-called “shredders", which are used to shred metal scrap, such as vehicle bodies to be scrapped, or demolition or construction waste.
- a plurality of axially parallel axes extending around the axis of rotation and axially parallel to the axis of rotation are provided on their circumference, on which a larger number of impact hammers are freely spaced apart.
- the rotor In its circumferential areas between the percussion hammers, the rotor is covered with protective caps of the type in question here, which in technical terms also called "rotor caps".
- the protective caps like the impact hammers, are made of steel and are predominantly made using casting technology, but can also be made by forging, flame cutting or as welded constructions.
- the protective caps serve on the one hand 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 fulfill this double function, they must have a high stability, but must not have an excessive volume, in order not to overload the rotor due to excessive weights and the dynamic forces associated with it during operation.
- protective caps of the type in question here have a bearing section into which a bearing opening is formed, into which the
- the bearing section carries a roof-like rim section. This has an end face facing away from the bearing section with a striking face which, in use, is exposed to a striking load from pieces of the material to be shredded which hit it.
- Rim section two long sides spaced from each other
- the rim section has a nominal thickness at least on its narrow sides when new.
- the protective caps arranged next to the percussion hammers are mounted so spaced from the respective percussion hammer that on the one hand the percussion 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 assigned percussion hammer in order to prevent its pendulum movement allow as narrow as possible to during the Operation to prevent the penetration of metal or stone parts in the gap in question and blockage of the hammer by material sitting in the gap.
- Percussion hammer associated long side of the rim section progresses particularly quickly. This higher wear is caused by
- a rotor was to be created for a machine for comminuting metal or stone materials, with which the optimally long period of use between two interruptions in operation, in which its protective caps had to be replaced, was achieved with simple means.
- the invention has achieved this object by designing such a striking tool according to claim 1.
- At least two protective caps designed according to the invention and permanently attached to the rotor and an impact tool are provided between the
- Protective caps are arranged and mounted on the rotor in an oscillating manner, in each case that longitudinal side of the protective caps facing the striking tool, to which the thickening section of the protective caps adjoins.
- a protective cap according to the invention for a rotor for comminuting metal objects or rock materials thus has one
- Bearing section in which a bearing opening is formed, into which a bearing axis can be inserted for fastening the protective cap to the rotor, and a roof-shaped rim section carried by the bearing section, which has an end face facing away from the bearing section with a striking surface, which in use uses a striking face Exposed to pieces of the material to be shredded that meet them, 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 project laterally beyond the bearing section, and have two narrow sides, one of which is located on one of the narrow ends of the
- Rim section extends between the long sides, the
- Rim section at least on its narrow sides when new each has a nominal thickness DSN.
- 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 at least on its
- the bearing section can of course be widened in a manner known per se in the area of the bearing eye to include those that occur during use To be able to safely absorb loads. Likewise, on the
- Bearing section narrow ribs or the like can be formed in a known manner, which serve to reinforce the protective cap as a whole or to optimize support of the rim portion.
- Thickening section is formed, which adjoins at least one of the long sides and has a thickness DVM which is greater than the nominal thickness DSN of the rim section.
- a material accumulation is consequently provided on the end face exposed to the impact load, which is adjacent to one of the long sides of the rim section and protrudes in the radial direction from the non-thickened areas of the rim section adjacent to it.
- the thickening section is formed and arranged on the end face of the rim section in such a way that it can be mounted in the closest vicinity of the impact hammer when mounted on a rotor according to the invention.
- the thickening section of additionally available material is only below the minimum thickness of the rim section required for safe operation, even if the thickness is no longer sufficient in the other, non-thickened areas of the rim section due to wear.
- rotor according to the invention unifies the time intervals that elapse between the replacement of the protective caps so that, within a technically unavoidable tolerance range, all protective caps regularly achieve a state of wear in which they must be replaced together.
- the material volume to be accumulated in the area of the thickening section provided according to the invention on the end face of the rim section, in particular its expansion and its thickness distribution, can be observed by observing the progress of wear in the vicinity of
- the thickening area extends over the entire width of the rim section.
- the thickening section extends from the longitudinal side to which it is adjacent in each case over a maximum of three quarters of the width of the rim section, the rim section then having a nominal thickness in a region that adjoins the longitudinal side that opposite to the long side, on which the thickening area adjoins.
- the limited extent of the thickening area also has the advantage that, in the case of a rotor according to the invention, on its longitudinal side, at the nominal thickness, there is a jump-free transition between the rotor according to the invention
- Protective cap and a conventionally designed protective cap arranged next to the relevant long side of the protective cap according to the invention can be produced.
- nominal thickness denotes the thickness in the unworn new condition, that is to say the thickness that the relevant area or section of the rim section has, if the inventive one
- Shredding machine is assembled.
- Rim section measured circumferential length of the rim section extends. In this way, are adjacent to the respective narrow side of the
- Rim section each have an end section, the thickness of which
- Protective cap can in particular be achieved in that the area of greatest thickness of the thickening section of the protective caps according to the invention in each case covers the angular range in a rotor according to the invention which the respective impact tool sweeps over during its pendulum movement during operation.
- the required thickness of the thickening section can also be determined by observing the wear and tear of conventionally designed ones
- Protective caps can be determined empirically. Experience shows here that even with particularly heavy wear, a sufficient wear volume in the thickened section of the rim section provided according to the invention is provided if for that from the maximum thickness DVM that the
- Thickening section 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 applies 1:10 ⁇ DVM: DSN ⁇ 1: 1.
- the ratio DVM: DSN is at least 1: 5, it can be ensured that the protective caps according to the invention, which are located in the area of the rotor that is particularly at risk of wear, can only reach the end of their service life even if the conventional other protective caps of the rotor also end up in a region that cannot be predicted to wear quickly need to be replaced.
- Thickening of the rim section causes the weight to be increased and the lifespan of a protective cap according to the invention to be extended if the ratio DVM: DSN is at most 4: 5.
- the thickening section jumps into the area adjacent to it, which has at least nominal thickness, it can be achieved that the transition area of the end face of the
- the thickening section can be carried out in a separate operation after the protective cap has been produced on the end face of the rim section
- protective caps according to the invention can be cast from iron casting materials known for this purpose, for example from so-called “white cast iron”, which has a chromium content 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
- Thickening section does not extend over the entire width of the rim section.
- the protective caps can be aligned by simply turning them so that that of their long side to which the
- Adjacent thickening section is assigned to the relevant hammer.
- Figure 1 shows a first protective cap in a longitudinal side view.
- FIG. 2 shows the protective cap according to FIG. 1 in a section along the section line A-A entered in FIG. 1;
- FIG. 3 shows a second protective cap in a longitudinal side view
- FIG. 4 shows the protective cap according to FIG. 3 in a section along the section line B-B entered in FIG. 3;
- Fig. 5 shows a detail of a rotor for a shredder for crushing metal scrap, such as vehicle bodies, mineral
- FIG. 6 shows the rotor according to FIG. 5 in a section along that in FIG. 5
- the protective caps 1, 1 'shown in FIGS. 1-2 are each made in one piece from a cast steel material customary for this purpose in the prior art.
- the protective caps 1, T are each formed mirror-symmetrically in the longitudinal side view (FIGS. 1, 3) 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 is located on one of the transverse sides of the central region 4, 4 'in the longitudinal direction L of the Protective cap 1, 1 'extends and is centered with respect 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 region 4.4 'and the rim section 3.3'.
- a bearing opening 8,8 ' is formed at a central point, which extends transversely to the support ribs 6, 6', 7, 7 'through the central area 4,4' and one Axis X defined, parallel to which the width dimensions specified here are measured.
- the rim section 3.3 ′′ stands with its long sides 9.9 ′, 10.10 ′′ in
- Width direction B on both sides laterally over the bearing section 2, 2 'and is delimited in the longitudinal direction L at its ends by narrow sides 11, 11', 12, 12 '', one of which is assigned to the ends of the long sides 9, 9 ', 10, 10 'connect with each other.
- End sections 16, 16 ', 17, 17' have the rim section 3.3 'with a nominal thickness DSN measured in the radial direction R in relation to the curvature of the rim section 3.3'.
- the ratio is DVM: DSN
- the thickening section 15 extends in the longitudinal direction L over approximately nine tenths of the circumferential length UL of the
- the thickening section 15 is rounded at its ends assigned to the narrow sides 11, 12 in each case like a throat in the respective
- Thickening area 15 in the new state constant 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 longer ends, which are assigned to the narrow sides 11 ", 12", each extending over approximately one tenth the circumferential length UL
- the maximum thickness DVM is in the new state for the protective cap 1 “in a central region of the thickening section 15”, which takes up about 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
- the maximum thickness DVM is only about half the width BF.
- the thickening section 15 “goes in over the remaining part of the width BF Width direction B in a fillet-like transition that is rounded off and rounded into the longitudinal side region 18 ′ of the adjacent longitudinal side 9 ′
- a rotor 100 constructed in principle like a conventional rotor for a machine (not shown here) for crushing automobile bodies or the like has three at equal angular intervals around a central one
- Rotor axis 101 distributed axes 102-104, on each one
- Percussion hammer 105 - 107 of conventional design is swinging.
- the rotor 100 also carries protective caps 108, which are outside of the impact hammer 105 - 107 during its pendulum movement
- the protective caps which, viewed in the longitudinal direction LX of the rotor axis 101, are arranged to the right and left of the respective movement range 109 and limit this on its longitudinal side, are each designed in accordance with the protective cap V shown in FIGS. 3 and 4, 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 V, but without the thickening section 15 '.
- the protective caps V which laterally delimit the movement ranges 109 are oriented toward the respective impact hammer 105 - 107 with their long sides 10 ′′ to which their thickening section 15 ′′ is adjacent. In this way, the impact hammers 105-107 each oscillate along the thickest region of the thickening section 15 'in use.
- Thickening section 15 Provided material accumulation compensated, so that also in the area of increased wear
- Thickening section 15 ' only falls below the minimum thickness required for proper functioning if it also falls below the minimum thickness in the originally only nominally thick sections (end sections 15', 16 ', longitudinal section 18').
- Protective caps 1 designed in the manner of the protective caps 1 shown in FIGS. 1 and 2 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, in use, along both longitudinal sides 9 , 10 of the protective caps 1 a hammer swings.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims
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 (de) | 2018-09-20 | 2018-09-20 | Schutzkappe und damit ausgestatteter rotor für eine maschine zur zerkleinerung von metallgegenständen oder gesteinsmaterialien |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3852931A1 true EP3852931A1 (de) | 2021-07-28 |
| EP3852931C0 EP3852931C0 (de) | 2024-04-03 |
| EP3852931B1 EP3852931B1 (de) | 2024-04-03 |
Family
ID=63683867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18778417.8A Active EP3852931B1 (de) | 2018-09-20 | 2018-09-20 | Schutzkappe und damit ausgestatteter rotor für eine maschine zur zerkleinerung von metallgegenständen oder gesteinsmaterialien |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3852931B1 (de) |
| ES (1) | ES2980230T3 (de) |
| PL (1) | PL3852931T3 (de) |
| WO (1) | WO2020057744A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022027589A1 (en) * | 2020-08-07 | 2022-02-10 | 3M Innovative Properties Company | Optical stack and housing for electronic device |
Family Cites Families (6)
| 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 |
-
2018
- 2018-09-20 PL PL18778417.8T patent/PL3852931T3/pl unknown
- 2018-09-20 WO PCT/EP2018/075455 patent/WO2020057744A1/de not_active Ceased
- 2018-09-20 ES ES18778417T patent/ES2980230T3/es active Active
- 2018-09-20 EP EP18778417.8A patent/EP3852931B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| ES2980230T3 (es) | 2024-09-30 |
| EP3852931C0 (de) | 2024-04-03 |
| WO2020057744A1 (de) | 2020-03-26 |
| PL3852931T3 (pl) | 2024-07-22 |
| EP3852931B1 (de) | 2024-04-03 |
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