EP0209757A2 - Barre d'impact pour rotor d'un broyeur à impact - Google Patents

Barre d'impact pour rotor d'un broyeur à impact Download PDF

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Publication number
EP0209757A2
EP0209757A2 EP86108821A EP86108821A EP0209757A2 EP 0209757 A2 EP0209757 A2 EP 0209757A2 EP 86108821 A EP86108821 A EP 86108821A EP 86108821 A EP86108821 A EP 86108821A EP 0209757 A2 EP0209757 A2 EP 0209757A2
Authority
EP
European Patent Office
Prior art keywords
blow bar
bar according
plane
symmetry
blow
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
EP86108821A
Other languages
German (de)
English (en)
Other versions
EP0209757B1 (fr
EP0209757A3 (en
Inventor
Hermann Schrödl
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.)
SCHROEDL, HERMANN
Original Assignee
Fried Krupp 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6275943&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0209757(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fried Krupp AG filed Critical Fried Krupp AG
Priority to AT86108821T priority Critical patent/ATE49514T1/de
Publication of EP0209757A2 publication Critical patent/EP0209757A2/fr
Publication of EP0209757A3 publication Critical patent/EP0209757A3/de
Application granted granted Critical
Publication of EP0209757B1 publication Critical patent/EP0209757B1/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
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor

Definitions

  • the invention relates to a blow bar for the rotor of an impact crusher or the like. Comminution machine with the features according to the preamble of claim 1.
  • a blow bar of this type is previously known from DE-PS 93 08 39.
  • This blow bar has a C-shaped or V-shaped cross-section in that the front side related to the direction of rotation of the rotor has a longitudinally extending obtuse-angled recess or notch .
  • This blow bar is clamped in the rotor in that special clamping pieces reach into the recess and come to rest at the deepest point of the cut-out, which at the same time means a constriction for the blow bar.
  • the associated rotor is also designed in such a way that the blow bar is supported with its continuously flat rear side - in relation to the rotor axis of rotation - outside the constriction under the action of tangential forces.
  • the invention has for its object to design a blow bar of the type mentioned so that a high security against breakage and in the holder against loads is achieved by both tangential and radial forces.
  • the object is achieved by the characterizing features of claim 1.
  • Blow bars in which the constriction is formed by grooves arranged on both sides, each of which has essentially planar mounting surfaces that extend inclined from the outside inwards towards the plane of symmetry, are already known, but they are not C-shaped curved. Above all, however, these known blow bars are not supported on the back of the rotor axis of rotation outside the constriction against the attack of tangential forces and are therefore inadequately secured against this load. In addition, the known blow bars, which have approximately the shape of a double T in cross section, are expensive in terms of material and thus also have a high weight.
  • the new blow bar has the particular advantage that it sits securely in its holder under the various types of load and has a high strength with a relatively low weight. This is achieved in particular in that in the area of the constriction, where the greatest bending stresses occur, these are considerably reduced by the fact that the rear side is supported outside the constriction in order to absorb tangential forces.
  • the new blow bar is also completely secured due to its favorable center of gravity and simultaneous mounting on both sides for radial forces against tilting movements that lead to premature wear. Furthermore, by the favorable ratio between strength and weight a reduction in manufacturing costs due to material savings achievable.
  • the mounting surfaces are inclined from the outside inwards towards the plane of symmetry and are essentially flat.
  • the flat design ensures simple manufacture of the counter surfaces respectively arranged on the rotor.
  • This advantage is supported by the fact that the mounting surfaces are arranged not only on one but on both sides of the plane of symmetry at the same distance, and that outside of the inclined mounting surfaces - apart from the usual rounded edges - support surfaces for absorbing tangential forces.
  • these support surfaces are larger than the mounting surfaces and run essentially perpendicular to the plane of symmetry of the blow bar.
  • contours of the blow bar which are on the outside in relation to the plane of symmetry, can be designed in accordance with the requirements resulting from the various materials to be shredded.
  • a further material saving is obtained if the outer corners of the back have a flattening which extends in the longitudinal direction and extends as far as the supporting surface, which is further reinforced by the fact that the flattening has a depression which is continuous in the longitudinal direction.
  • the blow bar extends over the entire width of the rotor and is pushed into the blow bar receptacle from the end face of the rotor.
  • the blow bars particularly in the case of rotors of greater width, can also be divided in their longitudinal extent.
  • a blow bar 1 is held in the rotor 2 of an impact crusher by rails 3 and 4, which extend parallel to the axis of the rotor shaft 5 and in corresponding recesses 6 of the extending transversely to the rotor axis and attached to rotor disks 7 distributed uniformly over the length of the rotor.
  • the four recesses 6 and thus also the blow bars 1 are distributed uniformly over the outer circumference of the rotor disks 7.
  • the rails 3 and 4 each have a trapezoidal projection 8 and 9 which tapers towards the blow bar 1 and which is formed in correspondingly shaped longitudinal grooves 10 and 11 the blow bar 1 engages each.
  • the rail 4 opposite the front side of the blow bar 1 in relation to the direction of rotation of the rotor is covered on its outer surface by a rotor protection plate 12 which is exchangeably fastened by screwing.
  • the grooves 10 and 11 of the blow bar 1 which is symmetrical and approximately C-shaped in terms of its cross section, each have a base area 13 and 14, which are arranged plane-parallel to one another and to each of which - in relation to their cross section - there is a mounting surface 15 on both ends and 16 connects, the inclination of the plane of symmetry 17 is 30 ° in each case.
  • All four support surfaces 15, 16 have the same size and are arranged at the same distance from the plane of symmetry 17.
  • Half of the distance between the base surfaces 13 and 14 lies on the plane of symmetry the surface focal point 18 of the blow bar cross section.
  • the surface 19 running through the center of gravity 18 perpendicular to the plane of symmetry 17 runs at least approximately at the same time through the axis of rotation of the rotor 2. From this it follows that - with appropriate consideration of the wear that occurs - on the brackets of the blow bar by radial forces in both directions practically no tilting moment is exercised and the bar "sits" extremely stable.
  • the support surfaces 20 arranged on the rear side of the blow bar are larger than the support surfaces 21 arranged on the front side and thus extend further outward from the plane of symmetry.
  • the support surface 20, which is external in the installed state of the blow bar is opposite a screwed-on, that is to say interchangeable support beam 22, which is embedded in the rail 3.
  • the support surface 21, which is diagonally opposite in relation to the surface center of gravity 18 and is therefore internal in the installed state, is opposite a counter support surface 23 of the rail 4, which likewise extends over the entire length of the blow bar or rail. Characterized in that the support beam 22 and at the same time the counter support surface 23 are acted upon under radial load, extremely low bending forces result in the region of the plane of symmetry 17, that is to say the constriction of the blow bar.
  • Continuous depressions 24 adjoin the front support surfaces 21 in the longitudinal direction, before the front protrudes continuously forward in its further course and thus forms the C-shape of the blow bar.
  • the edges 25 project outwards relative to the extension plane of the support surfaces 21.
  • the outer surfaces lying between the front and the back of the blow bar are arranged plane-parallel to one another in this exemplary embodiment.
  • blow bar 1 'differs from the blow bar 1 according to the previous embodiment only in that its outer surfaces 26' do not run plane-parallel to one another, but - apart from a small area piece adjoining the outer front edges 25 - converge towards the rear of the blow bar .
  • the angle of the wedge of the blow bar which acts on the material is practically reduced and the amount of material used is reduced.
  • FIG. 3 in which the blow bar 1 "differs from the blow bar 1 'according to FIG. 2 in that its rear support surfaces 20' are inclined outwards towards the front. The angle of inclination is based on on the vertical plane 19 about 15 °.
  • the blow bar 1 '' shown in FIG. 4 like the blow bar 1 '', has support surfaces 20 'which are inclined towards the front, but the recesses 24' on its front, in contrast to the blow bars according to the other exemplary embodiments, do not spring back relative to the support surfaces 21 .
  • a flattening 28 is chamfered between their outer surfaces 26 'converging towards the rear and the rear supporting surfaces 20'.
  • blow bars can, if appropriate in individual cases is moderate, can also be combined in other ways.
  • the blow bars only need to be surface-processed on their support or support surfaces.
  • the blow bars can be provided in a known manner with recesses which advantageously start from the rear surface 13.
  • All suitable wear materials that can be subjected to bending stress can be considered as the material for the blow bars. As a rule, it is cast steel with high chromium and nickel contents. Because of the high stability of the new blow bar against bending stresses, however, it is even possible in cases of less high stress to use material of lower bending strength, which is accordingly cheaper.
  • blow bars according to the invention can be used practically for crushing all types of rock, but in particular their use is advantageous for impact crushers for hard rock such as basalt, diabase, granite, gravel and the like. Rock types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP86108821A 1985-07-17 1986-06-28 Barre d'impact pour rotor d'un broyeur à impact Expired - Lifetime EP0209757B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86108821T ATE49514T1 (de) 1985-07-17 1986-06-28 Schlagleiste fuer einen prallbrecherrotor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3525442A DE3525442C2 (de) 1985-07-17 1985-07-17 Schlagleiste für einen Prallbrecherrotor
DE3525442 1985-07-17

Publications (3)

Publication Number Publication Date
EP0209757A2 true EP0209757A2 (fr) 1987-01-28
EP0209757A3 EP0209757A3 (en) 1987-09-02
EP0209757B1 EP0209757B1 (fr) 1990-01-17

Family

ID=6275943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108821A Expired - Lifetime EP0209757B1 (fr) 1985-07-17 1986-06-28 Barre d'impact pour rotor d'un broyeur à impact

Country Status (6)

Country Link
US (1) US4714207A (fr)
EP (1) EP0209757B1 (fr)
AT (1) ATE49514T1 (fr)
CA (1) CA1262712A (fr)
DE (1) DE3525442C2 (fr)
ZA (1) ZA865324B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224836A3 (en) * 1985-12-03 1988-08-03 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Impact bar for impact crushers or similar crushers
DE3742395C1 (de) * 1987-12-15 1989-06-15 Deutscher Sbm Vertrieb Franz W Rotor fuer eine Prallmuehle
AT394147B (de) * 1987-10-08 1992-02-10 Noricum Maschinenbau Handel Prallmuehle
EP0787529A1 (fr) * 1996-02-02 1997-08-06 Magotteaux International S.A. Rotor pour concasseur à percussion
EP3031526A3 (fr) * 2014-12-10 2016-07-06 Craco GmbH Rotor et procede de reparation d'un rotor

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826090A (en) * 1987-11-09 1989-05-02 Orphall Axel W Hammer assembly for a rotary material crusher
US5320292A (en) * 1992-11-06 1994-06-14 Smith Roger G Mounting for replaceable hammers in impact crusher
AT402371B (de) * 1993-07-12 1997-04-25 Schroedl Hermann Rotor für eine zerkleinerungsmaschine
DE19813308C2 (de) * 1998-03-26 2002-02-28 Hazemag & Epr Gmbh Schlagleiste für Prallmühlenrotoren und Rotor für Prallmühlen
RU2231388C2 (ru) * 2002-01-15 2004-06-27 Открытое акционерное общество "Сибирско-Уральская алюминиевая компания" Молотковая дробилка
US6955312B2 (en) * 2002-12-20 2005-10-18 Equipments Lan-Ro Inc. Apparatus and method for comminuting rock
IT201600094638A1 (it) * 2016-09-21 2018-03-21 Seppi M Ag S P A Utensile in un portautensile per trinciatrici/fresatrici
DE102017113238B4 (de) * 2017-06-16 2020-09-24 Keestrack N.V. Schlagleiste, Rotor und Prallbrecher
DE202017107107U1 (de) * 2017-11-23 2017-11-29 Keestrack N.V. Schlagleiste

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475430A (en) * 1936-06-02 1937-11-19 George Henry Pattinson Improvements in or relating to hammers for impact breaking or crushing machines
DE930839C (de) * 1951-10-11 1955-07-25 Westfalia Dinnendahl Groeppel Rotor fuer Schleudermuehlen
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR1537209A (fr) * 1967-07-24 1968-08-23 Dispositif pour le maintien des marteaux disposés dans les cavités du rotor de broyeurs et de broyeurs fins à impact
AT289522B (de) * 1968-03-14 1971-04-26 Franz Wageneder Prallmühle
AT325398B (de) * 1972-09-21 1975-10-27 Ver Edelstahlwerke Ag Schlagleister für prallmühlen
DE2317692B2 (de) * 1973-04-07 1978-07-27 Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen Schlagwerkzeug aus Verbundmetall fur Prall- und Hammerbrecher
AT351906B (de) * 1978-05-02 1979-08-27 Voest Ag Schlagleistenhalterung fuer den rotor einer prallmuehle
US4373678A (en) * 1980-06-30 1983-02-15 Reitter Guenther W Rotary impact crusher having a continuous rotary circumference
GB2110113A (en) * 1981-11-12 1983-06-15 Dresser Europe Sa Impeller bar for hammer type mill

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224836A3 (en) * 1985-12-03 1988-08-03 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Impact bar for impact crushers or similar crushers
AT394147B (de) * 1987-10-08 1992-02-10 Noricum Maschinenbau Handel Prallmuehle
DE3742395C1 (de) * 1987-12-15 1989-06-15 Deutscher Sbm Vertrieb Franz W Rotor fuer eine Prallmuehle
EP0320759A3 (en) * 1987-12-15 1989-09-27 Deutscher Sbm Vertrieb Franz Wageneder Gmbh Rotor for an impact crusher
US4915309A (en) * 1987-12-15 1990-04-10 Deutscher Sbm Vertrieb Franz Wageneder Rotor for a rebound crusher
EP0787529A1 (fr) * 1996-02-02 1997-08-06 Magotteaux International S.A. Rotor pour concasseur à percussion
BE1009998A3 (fr) * 1996-02-02 1997-11-04 Magotteaux Int Rotor pour concasseur a percussion.
EP3031526A3 (fr) * 2014-12-10 2016-07-06 Craco GmbH Rotor et procede de reparation d'un rotor

Also Published As

Publication number Publication date
DE3525442A1 (de) 1987-01-22
US4714207A (en) 1987-12-22
ZA865324B (en) 1987-03-25
EP0209757B1 (fr) 1990-01-17
DE3525442C2 (de) 1994-10-20
EP0209757A3 (en) 1987-09-02
ATE49514T1 (de) 1990-02-15
CA1262712A (fr) 1989-11-07

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