EP0529135A1 - Rotor pour broyeur à impact ou à marteaux - Google Patents

Rotor pour broyeur à impact ou à marteaux Download PDF

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Publication number
EP0529135A1
EP0529135A1 EP91114578A EP91114578A EP0529135A1 EP 0529135 A1 EP0529135 A1 EP 0529135A1 EP 91114578 A EP91114578 A EP 91114578A EP 91114578 A EP91114578 A EP 91114578A EP 0529135 A1 EP0529135 A1 EP 0529135A1
Authority
EP
European Patent Office
Prior art keywords
rotor
disks
hubs
rotor disks
welding
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
EP91114578A
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German (de)
English (en)
Other versions
EP0529135B1 (fr
Inventor
Gerhard Hemesath
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.)
Noell Service und Maschinentechnik GmbH
Original Assignee
Noell Service und Maschinentechnik GmbH
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6438898&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0529135(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19914127875 external-priority patent/DE4127875C2/de
Application filed by Noell Service und Maschinentechnik GmbH filed Critical Noell Service und Maschinentechnik GmbH
Publication of EP0529135A1 publication Critical patent/EP0529135A1/fr
Application granted granted Critical
Publication of EP0529135B1 publication Critical patent/EP0529135B1/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
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • 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
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor
    • 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
    • B02C13/28—Shape or construction of beater elements
    • B02C2013/2808—Shape or construction of beater elements the beater elements are attached to disks mounted on a shaft

Definitions

  • the invention relates to a rotor for impact or hammer mills, which consists of several welded rotor disks made of cast steel, which have widened, touching hubs.
  • the rotor disks have been welded to one another in their outer region (DE-GmS 18 31 058, DE-GmS 66 01 200) in order to achieve sufficient rigidity of the rotor body.
  • the weld seams are interrupted. This also applies to impact mill rotors welded together in this way, but the weld seams of which are long and complex. The manufacture of such rotors is correspondingly expensive.
  • the outer areas of the rotors are very exposed to wear, so that welds created there are also affected.
  • the invention has for its object from several Welding rotor disks assembled by welding in a safe and cost-saving manner. This is done in that the rotor disks are welded together by ring welds on the end faces of their hubs.
  • a particularly favorable effect in the production of these ring weld seams is to ensure that the rotor disks, when they rest against each other with their hubs, have a certain distance from one another in the outer zones, so that the welding machine used can reach all the way up to the hubs.
  • the ring weld seams can then all be produced at the same time by means of fixed welding devices that reach between the rotor disks and the hubs.
  • the welds required in the known welded rotors can only be produced by means of hand-held devices.
  • a rotor is known (DE-PS 33 17 070), in which annular rotor disks are welded with their inner edge onto a drum serving as an axis.
  • two weld seams have to be produced for each ring disk, while in the inventive design of the rotor, each ring weld seam connects two adjacent rotor disks to one another. This creates a stable rotor body which, for example, does not need to be guided on a shaft over its entire length, but can only be supported on the shaft at both ends, so that a more precise turning of the rotor disks is only partially necessary on the two end disks.
  • the rotor disks have a widened outer ring which is half that of the hub on both sides compared to the hub whose narrower is what is required as the distance between adjacent outer rims for the passage of a welding gun or a welding device to the hubs.
  • the rotor therefore consists exclusively of the rotor disks produced in cast steel and is consequently very cheap to manufacture.
  • the parts that form the widened outer ring of the rotor disks are machined or pre-processed before welding the hubs in order to create flat contact surfaces for the blow bars. Since the rotor disks with their hubs are only simple components and the centering of the rotor disks with respect to one another can be carried out very precisely, this eliminates the very complex machining of a finished rotor over the entire width. Post-processing may only be necessary in exceptional cases.
  • weld beads provided on the outer edges of the end faces of the hubs in particular in the case of large rotors, such as are used in primary crushers, cannot provide the necessary strength with regard to the impact and impact stresses occurring during the operation of such crushers exhibit.
  • the recesses provided for the weld seams on the end faces of the hubs extend from the outer edges over a considerable part of the radial thickness of the hubs and are filled with welding material.
  • the fabrication may be of considerable thickness welding seams can be done in different ways.
  • the most advantageous way of doing this is to form the weld seams from a plurality of layers laid one on top of the other.
  • the rotor disks which are centered, aligned in the circumferential direction and braced to one another, are rotated slowly and repeatedly in the horizontal axis position under the fixed welding machines reaching up to the hubs or between the aforementioned turns so that, basically, the grooves formed by two turns each starting with one weld over the other until the grooves are filled with welding material.
  • this can take place simultaneously in the presence of a number of welding devices corresponding to the number of slots in all slots of a rotor.
  • the welding machines are equipped with an automatic welding wire feeder and they are automatically reset by a distance corresponding to the thickness of the welding layers after each rotor revolution, the welding seams can be produced with a minimum of manpower and time, although the number of layers for large rotors is 50 or more and the length of the weld seams created in the individual grooves can be approximately 100 meters.
  • the depth of the grooves must of course be selected so that annular ribs with corresponding end faces remain on the hubs with which the adjacent hubs lie against one another when the rotor disks are clamped together.
  • These ribs may melt away during the welding process, so that the hubs, if the ribs are provided near the inner edges of the end faces, may then be welded together over the entire end face.
  • the rotor disks must, of course, be centered exactly with respect to one another, but also aligned with one another in the circumferential direction, so that the edge cutouts provided in the rotor disks are exactly aligned with one another. Since the clamping of the rotor disks takes place in a horizontal position, but the welding must be carried out with the rotor disks arranged vertically, i.e. with the rotor axis horizontal, the clamped rotor disks must be moved from one position to the other.
  • ring disks can be inserted into all cylindrical bores of the hubs and the rotor disks provided with the ring disks can be pushed onto a tube which later also serves to carry the unit consisting of the rotor disks which are temporarily connected to one another.
  • the cylindrical bores can also be chosen so narrow and the washers so wide that they engage in the bores of two adjacent rotor disks and thus center them directly with one another.
  • the rotor disks are placed one on top of the other with the interposition of an annular disk and then aligned with one another in the circumferential direction by rotating around the annular disks.
  • the hubs of the rotor disks not only from the outside but also from the inside with one however, only simple ring welds or those consisting of only a few layers are connected to one another.
  • the hubs are also provided with small bores which are to be provided within the annular ribs.
  • the rotors shown each consist of several rotor disks 1 made of cast steel, which are provided with a central cylindrical opening 2 and a wider hub 3 surrounding them. On the outer edge, depending on the type of crushing tools provided on them (impact hammers 4, blow bars 5), they have wider bearing bodies 6 and 7, respectively. In the cases shown in FIGS. 1-8, they are designed such that a gap between the bearing bodies of adjacent rotor disks 1 8 remains.
  • the hubs 3 of adjacent rotor disks 1 are firmly connected to one another at their outer edges by ring weld seams 9.
  • ring weld seams 9 To produce these ring weld seams, the rotor disks centered on the hubs 3 by means of dowel pins 10 and braced against one another are slowly rotated, fixed welding devices which reach the hubs through the gaps 8 producing the weld seam.
  • the impact hammers 4 are held between the disks for the final assembly in the hammer mill rotor shown in FIGS. 1 and 2 and their axes 11 are in the bearing body 6 from the front side of the 3 and 4, the impact bar 5 is inserted into the edge cutouts 12 from the outside and is pressed by wedges 13 and pressure elements 14 against the bearing body 7 serving for support.
  • the impact mill rotor shown in FIGS. 1 and 2 In the impact mill rotor shown in FIGS.
  • 5 to 8 illustrate that rotors of different widths can be produced from rotor disks of different hub widths, so that very narrowly differentiated offers are possible with low inventory.
  • only two rotor disks 1 can also be provided, if appropriate with the interposition of a hub-like ring 3 ', whereby in a modification of the invention, axially parallel support beams 15 are welded to the disk edges 1' of the rotor disks.
  • the support beams are only attached after the rotor-hub body has been welded together, so that all-round welding, also automated, is also possible in this embodiment provided for rotors of smaller impact mills.
  • the rotor disks 1 are provided with bores 17 on the end faces of their hubs 3 in order to enlarge the weld seams 9. They leave annular ribs 18, the end faces of which abut the adjacent rotor disks. After the welding process, the weld grooves 16 are filled with the welding material forming the weld seams 9.
  • the rotor disks 1 are aligned with the ring ribs 18 one on top of the other and in the circumferential direction.
  • the centering is carried out with the aid of ring disks 20, 21 which are inserted into cylindrical recesses 22 of the hubs 3, and a tube 23 onto which the rotor disks 1 with the ring disks 20, 21 are pushed and on which they are aligned with one another by rotating in the circumferential direction , so that the edge cutouts 12 provided on the rotor disks are aligned with one another.
  • the tube 23 is brought into a rotationally fixed connection with the outer rotor disks 1 by means of drivers 24.
  • the rotor disks 1 are provisionally connected to one another by welding spots 25 which are basically attached to the weld groove 16. If necessary, after the provisional connection of the rotor disks 1 through the welding spots 25 and after removing the tube 23 and the ring disks 20, 21 (the inner ring disks 21 having to be destroyed), ring weld seams 26 on the inner butt welds of the hubs 3 inside the ring ribs 18 can also be made be attached. The tube 23 can be pushed back into the two outer ring disks 20 after reinserting them. This situation is shown in Fig. 11. The washers 21 are only shown in dashed lines here because they have already been removed at this stage of assembly.
  • ring disks 21 are chosen so wide for centering and alignment in the circumferential direction that they engage in the recesses of two adjacent ring disks.
  • the rotor disks are provisionally connected from the inside in the area of the edge cutouts provided for this purpose in the ring disks by welding spots.
  • the aforementioned Ring welds 26 attached to the inner butt welds of the hubs 3. Only then is the tube 23 inserted into the outer ring disks that have been used in the meantime.
  • the interconnected rotor disks 1 are then pivoted into a horizontal axial position and applied to a welding system which has a frame 27 which is provided with two pairs of rollers 28, on which the tube 23 projects with its over the rotor disks 1 Hang up ends.
  • the roller pairs can be driven.
  • a cantilever 29 attached to the frame 27 and on which welding devices 30 are arranged extends over the unit on the frame 27 from the rotor disks 1 which are temporarily connected to one another.
  • the unit consisting of the rotor disks 1 is slowly rotated, welding layers 16, starting from the base thereof, being placed one above the other in several or many turns until the weld grooves 16 are filled with welding material, the welding devices 30 being raised accordingly will.
  • the tube 23 and the washers 20 and 21 are removed from the finished rotor body thus produced and this is provided with a shaft and the other parts, such as with the blow bars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP91114578A 1991-08-22 1991-08-29 Rotor pour broyeur à impact ou à marteaux Expired - Lifetime EP0529135B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127875 1991-08-22
DE19914127875 DE4127875C2 (de) 1991-01-30 1991-08-22 Rotor für Prall- oder Hammermühlen und Verfahren zum Herstellen eines Rotors

Publications (2)

Publication Number Publication Date
EP0529135A1 true EP0529135A1 (fr) 1993-03-03
EP0529135B1 EP0529135B1 (fr) 1996-10-23

Family

ID=6438898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114578A Expired - Lifetime EP0529135B1 (fr) 1991-08-22 1991-08-29 Rotor pour broyeur à impact ou à marteaux

Country Status (9)

Country Link
EP (1) EP0529135B1 (fr)
JP (1) JP3306105B2 (fr)
AT (1) ATE144442T1 (fr)
AU (1) AU641069B2 (fr)
DE (1) DE59108305D1 (fr)
ES (1) ES2095888T3 (fr)
GR (1) GR3022377T3 (fr)
MX (1) MX9204852A (fr)
ZA (1) ZA925345B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121754B (fi) * 2009-07-14 2011-03-31 Allu Finland Oy Seulova, murskaava tai sekoittava kauha

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1831058U (de) 1961-03-07 1961-05-10 Hazemag Hartzerkleinerung Und Umlaeufer fuer schleuderprallmuehlen hoher drehzahl.
US3123702A (en) * 1964-03-03 Deep groove arc welding apparatus
DE1257541B (de) 1965-05-06 1967-12-28 Hazemag Hartzerkleinerung Schlagleiste fuer Rotoren von Prallmuehlen
DE6601200U (de) 1966-01-03 1969-02-27 Miag Gmbh Schlaegerrotor fuer schlaegermuehlen
FR1589790A (fr) * 1968-10-22 1970-04-06
FR2314996A1 (fr) * 1975-06-19 1977-01-14 Bbc Brown Boveri & Cie Procede et dispositif de realisation d'un rotor forme d'un assemblage de disques soudes
FR2356472A1 (fr) * 1976-07-02 1978-01-27 Bbc Brown Boveri & Cie Procede de liaison d'elements metalliques par soudage a l'arc par fusion
EP0019542A1 (fr) * 1979-05-17 1980-11-26 APPAREILS DRAGON, Société Anonyme Concasseurs à percussion à marteaux articulés
DE3317070C1 (de) 1983-05-10 1984-07-26 Maschinenfabrik B.Maier GmbH & Co KG, 4800 Bielefeld Schlagmühle
DE8214553U1 (de) * 1982-05-18 1985-08-29 Gebr. Hofmann, 8700 Würzburg Rotor für Hammermühlen
DE3522643A1 (de) * 1985-06-25 1987-01-08 Kloeckner Wilhelmsburger Gmbh Verfahren und vorrichtung zum anschweissen eines stutzens an einen behaelter oder einen teil eines behaelters
EP0444432A1 (fr) * 1990-03-01 1991-09-04 NOELL Service und Maschinentechnik GmbH Rotor pour broyeur à percussion ou a marteaux

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151816A (en) * 1962-06-18 1964-10-06 Pettibone Mulliken Corp Crusher apparatus and method of manufacture

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123702A (en) * 1964-03-03 Deep groove arc welding apparatus
DE1831058U (de) 1961-03-07 1961-05-10 Hazemag Hartzerkleinerung Und Umlaeufer fuer schleuderprallmuehlen hoher drehzahl.
DE1257541B (de) 1965-05-06 1967-12-28 Hazemag Hartzerkleinerung Schlagleiste fuer Rotoren von Prallmuehlen
DE6601200U (de) 1966-01-03 1969-02-27 Miag Gmbh Schlaegerrotor fuer schlaegermuehlen
FR1589790A (fr) * 1968-10-22 1970-04-06
FR2314996A1 (fr) * 1975-06-19 1977-01-14 Bbc Brown Boveri & Cie Procede et dispositif de realisation d'un rotor forme d'un assemblage de disques soudes
FR2356472A1 (fr) * 1976-07-02 1978-01-27 Bbc Brown Boveri & Cie Procede de liaison d'elements metalliques par soudage a l'arc par fusion
EP0019542A1 (fr) * 1979-05-17 1980-11-26 APPAREILS DRAGON, Société Anonyme Concasseurs à percussion à marteaux articulés
DE8214553U1 (de) * 1982-05-18 1985-08-29 Gebr. Hofmann, 8700 Würzburg Rotor für Hammermühlen
DE3317070C1 (de) 1983-05-10 1984-07-26 Maschinenfabrik B.Maier GmbH & Co KG, 4800 Bielefeld Schlagmühle
DE3522643A1 (de) * 1985-06-25 1987-01-08 Kloeckner Wilhelmsburger Gmbh Verfahren und vorrichtung zum anschweissen eines stutzens an einen behaelter oder einen teil eines behaelters
EP0444432A1 (fr) * 1990-03-01 1991-09-04 NOELL Service und Maschinentechnik GmbH Rotor pour broyeur à percussion ou a marteaux

Also Published As

Publication number Publication date
DE59108305D1 (de) 1996-11-28
ZA925345B (en) 1993-02-10
ATE144442T1 (de) 1996-11-15
MX9204852A (es) 1993-04-01
JP3306105B2 (ja) 2002-07-24
EP0529135B1 (fr) 1996-10-23
AU8996591A (en) 1993-02-25
JPH05192598A (ja) 1993-08-03
ES2095888T3 (es) 1997-03-01
GR3022377T3 (en) 1997-04-30
AU641069B2 (en) 1993-09-09

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