EP0224836A2 - Barre à percussion pour broyeur à percussion ou broyeurs similaires - Google Patents

Barre à percussion pour broyeur à percussion ou broyeurs similaires Download PDF

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Publication number
EP0224836A2
EP0224836A2 EP86116276A EP86116276A EP0224836A2 EP 0224836 A2 EP0224836 A2 EP 0224836A2 EP 86116276 A EP86116276 A EP 86116276A EP 86116276 A EP86116276 A EP 86116276A EP 0224836 A2 EP0224836 A2 EP 0224836A2
Authority
EP
European Patent Office
Prior art keywords
bar according
blow bar
base body
rotor
working
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
EP86116276A
Other languages
German (de)
English (en)
Other versions
EP0224836B1 (fr
EP0224836A3 (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
Application filed by Fried Krupp AG filed Critical Fried Krupp AG
Publication of EP0224836A2 publication Critical patent/EP0224836A2/fr
Publication of EP0224836A3 publication Critical patent/EP0224836A3/de
Application granted granted Critical
Publication of EP0224836B1 publication Critical patent/EP0224836B1/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 impact crushers or the like. Comminution machines with the features according to the preamble of claim 1.
  • Blow bars of this type have the requirement, on the one hand, to achieve a good splitting effect on the material to be crushed and, on the other hand, to have great wear resistance in order to achieve a sufficient service life.
  • a good splitting effect requires a sharp-edged working edge, which breaks out easily or breaks away completely when the material to be crushed is severely impacted. This breaking away is caused by high shear and bending stresses that form on the protruding working edge.
  • An additional, e.g. Wear protection easily broken off by welding.
  • a blow bar with cams or ribs serving as wear protection and arranged on its front is known from DE-AS 23 07 988. These cams or ribs are in with the blow bar cast in one piece and arranged in rows.
  • the working edge lying between the front surface and the outer or top surface is provided with a continuous rib parallel to the rotor axis.
  • This cast blow bar has the disadvantage that in the case where hard, wear-resistant alloys are used, they are brittle and fragile, and in the case of the use of less fragile alloys the wear resistance is correspondingly lower.
  • the working edge of this bar which is designed as a rib, breaks out easily because the section modulus which counteracts the bending and shear forces is too low.
  • Another disadvantage of this bar is that a blow bar that has become unusable due to breakage or wear has to be completely replaced, which involves a great deal of material.
  • the blow bar previously known from CH-PS 564 972 provides for exchangeable arrangement of triangular cover plates which form the working edge in a row.
  • a nut is soldered to the inside of these cover plates, which are made of hard metal, into which a retaining screw engages from the inside of the blow bar.
  • the cover plate is adjoined on both sides, ie on the cover surface and on the front surface of the blow bar, by a further, inserted hard metal plate, against which the cover plate is tensioned.
  • the invention is based, to avoid the disadvantages of known blow bars described, to create a blow bar which, with a good splitting action, has a sufficient service life and in which a quick interchangeability of the working tools is achieved.
  • the arrangement of the interchangeable work tools on the front surface of the blow bar facing the material to be crushed means that mainly only pressure loads occur, which makes it possible to apply particularly wear-resistant metallic alloys or hard materials without them breaking out easily. As a result, even relatively large items to be crushed can be broken with a comminution machine equipped with the blow bar according to the invention.
  • the new beater bar the economy is increased above all by reducing breakage and wear, by saving energy through an improved crushing effect, and by reducing maintenance and machine downtimes.
  • the mounting rails are designed so that the working tools are secured against tearing out during operation. Greater security is achieved if the mounting rails are provided on the outside with a rail head-like extension. To avoid sharp edges that can lead to cracking, the rail head-like extensions are advantageously rounded off in a mushroom-like manner.
  • the base body has a constriction formed by mutually opposing longitudinal grooves, corresponding holding rails of the rotor engaging in the longitudinal grooves, and on the rear side facing away from the working edge with a constriction in the region of the holding rail (s) in the region of the holding rail.
  • arranged support surface is provided to absorb tangential forces.
  • This design also allows, based on the cross section, a relatively wide design of the base body in the region of the mounting rails and thus of the work tool, so that the work Rotating forces acting on the tool do not cause the grooves to widen due to the mounting rails, because these forces are absorbed indirectly by the rotor body via the support surface before a platical deformation of the base body is possible.
  • the measure that at least some of the work tools have at least one protruding, strip-like elevation extending radially approximately over the height of the work tool not only achieves a longer service life of the work tool in that there are no significant bending moments and shear forces acting transversely to these elevations arise, but also the splitting effect of the blow bar is significantly improved.
  • the splitting effect is further improved by an advantageous cutting-like design of the elevation and a protrusion compared to the working edge provided with a strip-like projection on the front surface.
  • the elevation is convex on the outside.
  • the wedge effect of the elevation supported by the components behind it is thereby further improved.
  • the elevation penetrates the crushed material more easily if it is angled approximately in the region of the projection, so that it forms the tip of an - obtuse - angle there.
  • the outflow of the crushed material splitting at the elevations and protrusions of the work tool is also ensured by this design and by the fact that the radial Increase - based on the rotor cross-section - within the bend pointing approximately in the direction of the rotor axis, favors.
  • the wear resistance of the new blow bar is increased in that at least some of the work tools are provided on the front surface with an applied layer of wear-resistant material. It is particularly advantageous that at least part of the strip-like elevation and protrusions of the work tool is formed from a hard material.
  • the particularly wear-resistant metallic alloys which can be applied in the known manner, for example cladding, are suitable as wear-resistant material. The same also applies to the hard material to be applied, generally referred to as hard metal, which can also be glued on and soldered on.
  • it is possible to increase the adhesive effect by anchoring the wear-resistant material in the work tool, particularly on its front surface, for example by means of corresponding recesses in the work tool.
  • the length of the work tools is small in relation to the length of the base body, the exchange is facilitated and the manufacture of the work tools is cheaper. In addition, the work tools can be easily handled by the operating personnel without any aids.
  • a symmetrical base body 2 is provided on both sides with a constriction in the region of its plane of symmetry, which is formed by a tangential axis X, into which retaining rails 38 and 39 arranged on a disk of the rotor engage in such a way that Support surfaces 36 and 37 running at an angle to the axis X absorb the radial forces.
  • the - based on the direction of rotation of the rotor - on the back of the base body 2 on the outside of the support surface 36 is adjoined by a support surface 34 arranged on the rotor 40, on which the back of the base body 2 of the blow bar 1 rests and thereby absorbs the tangential forces .
  • a component of the tangential load Pairs of forces are introduced into the rotor 40 via a support surface 35 which lies obliquely opposite the support surface 34 beyond the axis X.
  • the surfaces 34 and 35 run parallel to one another and form the width of the base body 2, the plane Y of which lies in the middle and runs through the rotor axis of rotation 42.
  • Another surface 34a, which adjoins the front oblique support surface 36, runs parallel to the support surface 34 and lies in the same plane as the support surface 35.
  • the working tool 3 has two mounting rails 14 and 15, each of which is provided with a mushroom-like rounded head-like extension 16 and 17 in relation to the cross section.
  • the enlargement 16 or 17 is followed by a narrowing 18 or 19 formed by a rounding on both sides.
  • the curves of the extensions and constrictions merge into one another and form concave or convex curved outer surfaces running in the longitudinal direction of the working tool 3.
  • the mounting rails 14 and 15 are arranged in the region of the rear of the work tool 3.
  • the working tool 3 consists of a carrier body 4, on which a layer 7 of wear-resistant material is applied to its front surface 5 and its top surface 6.
  • the elevation 8 consists of two parts 5A and 5B, which are at a relatively large obtuse angle to each other extend, at the apex of which an edge 13 provided with a tip runs.
  • the part 5B of the elevation 8 which lies within the edge 13 with respect to the rotor cross section and which protrudes by the dimension R of the front surface 5 extends approximately in the direction of the rotor axis 42, the part 5a lying between the edge 13 and the top surface 6 is the increase 8 angled backwards accordingly.
  • the elevation 8, as can be seen from FIG. 3, is arranged centrally in the work tool 3. By cutting the top surface 6 with the inclined front surface 5A, an edge 12 is also created in cross section.
  • the basic body 2 belonging to the exemplary embodiment according to FIGS. 1 to 3 is shown separately in FIG. 7.
  • the support surface arranged on the rotor 40 includes the support surface 30 arranged on the rear side of the base body 2, which extends from the inclined support surface 33, which rests on the support surface 36, to close to the outer end of the base body 2.
  • the groove 22 belongs to the mounting rail 14 and the groove 23 belongs to the mounting rail 15, the two grooves being duplicated due to the symmetry of the base body 2. In the event of breakage or wear of the outer part of the base body 2, the latter can thus be turned over.
  • the constrictions 18 and 19 of the mounting rails 14 and 15 include corresponding constrictions 28 and 29 of the grooves 22 and 23.
  • the support surfaces 37 include corresponding opposite support surfaces 32, while the support surface 34A has a support surface 31A belongs.
  • the support surfaces 32 take the place of the support surfaces 33 and the support surface 31A takes the place of the support surface 31 and vice versa.
  • a constriction surface 26 adjoins the constriction 28, which supports the rear of the work tools 3 against tangential forces.
  • the constriction 29 merges into a subsequent support surface 27, against which a surface 21 (FIG. 2), which is arranged on the underside facing the rotor center, bears against the work tools 3.
  • FIG. 4 shows a further exemplary embodiment with work tools 3A modified compared to the exemplary embodiment according to FIG. 1 and a base body 2A likewise modified, which is shown separately in FIG. 8.
  • the base body 2A also has a bearing surface 30, which again bears against the support surface 34 of the rotor 40A, and two inclined bearing surfaces 32 and 33, which abut against the counter surfaces 36 and 37, which are held by the holding rails 38 and 39 of the rotor 40A be formed.
  • the width B of the base body 2A of this blow bar 1A again extends from the contact surfaces 31 or 31A to the contact surface 30.
  • the working tool 3A is again provided on its rear side with two mounting rails, of which only the mounting rail 14A which is closer to the center of the rotor in the installed state has a rail-head-like extension 16A provided with a mushroom-like curvature which engages in a correspondingly shaped groove 24 in the base body 2A.
  • a bracket is further out
  • Rail 19 is provided on the work tool 3A, which has an approximately square cross-section and fits into a correspondingly shaped groove 25 of the base body 2A.
  • a slightly curved surface 20 adjoins the mounting rail 19 on the outside and, in operation, is pressed against a correspondingly curved support surface 26A on the base body 2A.
  • the front surface 5 of the working tool 3A is again provided with a radial strip-like elevation 8 which is convexly curved on the outside by being angled several times in its length and thereby forming adjoining cutting edges 9A, 9B and 9C.
  • a radial strip-like elevation 8 which is convexly curved on the outside by being angled several times in its length and thereby forming adjoining cutting edges 9A, 9B and 9C.
  • the working tool 3A furthermore has a strip-like projection 10, which is provided with a cutting edge 11 and a certain amount, which is characterized by the dimension h, is offset inwards relative to the outer edge 12.
  • the projection 10 has the width k at its base and runs parallel to the longitudinal extent of the blow bar.
  • the protruding thickness s of the protrusion 10 is less than the maximum height of the elevation 8, which protrudes by the dimension R from the front surface 5.
  • the maximum height R lies in the area of the cutting edge 11 of the projection 10.
  • an outwardly curved surface 21 is arranged on the underside 18A of the mounting rail 14A, which rests on a correspondingly curved supporting surface 27 of the base body 2A.
  • the elevation 8th is arranged centrally in the working tool 3A.
  • FIG. 9 shows a further embodiment of a base body 2B, which is provided for receiving the work tool 3 shown in FIG. 2 and is accordingly provided with grooves 22 and 23 and support surfaces 26 and 27.
  • the work tools 2A and 2B shown in Figs. 8 and 9 are not intended to be reversed and therefore have only grooves for receiving a number of work tools.
  • 7 to 9 show certain distances from the axis X running tangentially in the constriction or in the holding rails 38 and 39.
  • Y1 is the maximum distance of the surface 30
  • Y2 is the maximum distance from the surface 26 or 26A
  • Y3 is the minimum distance of the lower mounting groove 23 or 24 from this axis.
  • Y1 In order for the tangential forces to be introduced into the rotor 40 or 40A without changing the direction, Y1 must be greater than Y3.
  • Y1 is also equal to or less than Y2.
  • a base body 2C is provided with a mounting rail 14B which engages in a correspondingly shaped groove in work tools 3B. Otherwise, the base body 2C is again provided on its rear side with a support surface 30 which adjoins the support surface 34 of the rotor, and is held again in the holding rails 38 and 39 of the rotor via support surfaces 36 and 37.
  • the base body 2C is provided with work tools 3B, which together form the blow bar 1B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP19860116276 1985-12-03 1986-11-24 Barre à percussion pour broyeur à percussion ou broyeurs similaires Expired - Lifetime EP0224836B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3506/85 1985-12-03
AT350685A AT392740B (de) 1985-12-03 1985-12-03 Schlagleiste fuer prallbrecher od. dgl. zerkleinerungsmaschinen

Publications (3)

Publication Number Publication Date
EP0224836A2 true EP0224836A2 (fr) 1987-06-10
EP0224836A3 EP0224836A3 (en) 1988-08-03
EP0224836B1 EP0224836B1 (fr) 1990-10-24

Family

ID=3551451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860116276 Expired - Lifetime EP0224836B1 (fr) 1985-12-03 1986-11-24 Barre à percussion pour broyeur à percussion ou broyeurs similaires

Country Status (3)

Country Link
EP (1) EP0224836B1 (fr)
AT (1) AT392740B (fr)
DE (1) DE3675165D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT394147B (de) * 1987-10-08 1992-02-10 Noricum Maschinenbau Handel Prallmuehle
EP0634218A1 (fr) * 1993-07-12 1995-01-18 Hermann Schrödl Rotor pour appareil broyeur
AT400229B (de) * 1989-12-06 1995-11-27 Fischer Ag Georg Einrichtung zur chargenweisen aufbereitung von schüttgut
WO2015128753A1 (fr) * 2014-02-28 2015-09-03 Sgm Gantry S.P.A. Tambour de séparateur balistique pour matériaux humides

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397773B (de) * 1992-07-28 1994-06-27 Schroedl Hermann Schlagleiste für brecherrotoren od. dgl.
AT400930B (de) * 1994-12-01 1996-04-25 Schroedl Hermann Rotor für zerkleinerungsmaschinen

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956188C (de) * 1954-04-01 1957-01-17 Kloeckner Humboldt Deutz Ag Rotor fuer Prallbrecher mit auswechselbaren Schlagleisten
DE1011257B (de) * 1954-03-03 1957-06-27 Boehler & Co Ag Geb Werkzeug, insbesondere Schlagwerkzeug fuer die Hartzerkleinerung, mit durch stellenweise Auftragungen verschleissfesten Materials erzeugter Oberflaechenpanzerung
DE975240C (de) * 1953-06-30 1961-10-12 Hazemag Hartzerkleinerung Schleudermuehlenrotor mit mindestens einer in eine Nut des Rotors einsetzbaren Schlagleiste
US3207448A (en) * 1963-07-10 1965-09-21 Boyd C Miller Impact hammer for hammermills
FR2218736A7 (fr) * 1973-02-17 1974-09-13 Hazemag Andreas Kg
FR2257343A1 (en) * 1974-01-16 1975-08-08 Matelest Sa Two-part refuse comminuter arm - impact block fits into recess in impact face, secured by bolts
CH564972A5 (fr) * 1972-09-21 1975-08-15 Ver Edelstahlwerke Ag
CH569520A5 (fr) * 1973-02-02 1975-11-28 Fava O M T Di & C S N C
DE2307988B2 (de) * 1973-02-17 1978-05-03 Hazemag Dr. E. Andreas Gmbh & Co, 4400 Muenster Schlagleiste für Prallmühlenrotoren
AT351906B (de) * 1978-05-02 1979-08-27 Voest Ag Schlagleistenhalterung fuer den rotor einer prallmuehle
US4352774A (en) * 1980-03-13 1982-10-05 The Frog, Switch & Manufacturing Company Method and arrangement for support of contact elements of hammermills and the like
GB2110113A (en) * 1981-11-12 1983-06-15 Dresser Europe Sa Impeller bar for hammer type mill
GB2153704A (en) * 1984-01-27 1985-08-29 Quast Inc Roger Hammer assembly for a rotary material crusher
EP0209757A2 (fr) * 1985-07-17 1987-01-28 Hermann Schrödl Barre d'impact pour rotor d'un broyeur à impact

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH584067A5 (fr) * 1974-03-15 1977-01-31 Andreas E Dr Hazemag Kg
AU520936B2 (en) * 1977-05-25 1982-03-11 Clyde Industries Limited Hammer bar
JPS5419256A (en) * 1977-07-13 1979-02-13 Kawasaki Heavy Ind Ltd Method of producing tooth for jaw crushers
SU893255A1 (ru) * 1980-03-24 1981-12-30 Государственный Всесоюзный Научно-Исследовательский Институт Цементной Промышленности "Ниицемент" Молоток дл молотковой дробилки
SU950432A1 (ru) * 1981-01-12 1982-08-15 Всесоюзный научно-исследовательский институт строительного и дорожного машиностроения Било роторной дробилки
EP0096083B1 (fr) * 1982-06-04 1986-08-13 Rudolf P. Fritsch Outil de coupe rotatif en particulier pour la granulation de rubans de matière synthétique

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975240C (de) * 1953-06-30 1961-10-12 Hazemag Hartzerkleinerung Schleudermuehlenrotor mit mindestens einer in eine Nut des Rotors einsetzbaren Schlagleiste
DE1011257B (de) * 1954-03-03 1957-06-27 Boehler & Co Ag Geb Werkzeug, insbesondere Schlagwerkzeug fuer die Hartzerkleinerung, mit durch stellenweise Auftragungen verschleissfesten Materials erzeugter Oberflaechenpanzerung
DE956188C (de) * 1954-04-01 1957-01-17 Kloeckner Humboldt Deutz Ag Rotor fuer Prallbrecher mit auswechselbaren Schlagleisten
US3207448A (en) * 1963-07-10 1965-09-21 Boyd C Miller Impact hammer for hammermills
CH564972A5 (fr) * 1972-09-21 1975-08-15 Ver Edelstahlwerke Ag
CH569520A5 (fr) * 1973-02-02 1975-11-28 Fava O M T Di & C S N C
FR2218736A7 (fr) * 1973-02-17 1974-09-13 Hazemag Andreas Kg
DE2307988B2 (de) * 1973-02-17 1978-05-03 Hazemag Dr. E. Andreas Gmbh & Co, 4400 Muenster Schlagleiste für Prallmühlenrotoren
FR2257343A1 (en) * 1974-01-16 1975-08-08 Matelest Sa Two-part refuse comminuter arm - impact block fits into recess in impact face, secured by bolts
AT351906B (de) * 1978-05-02 1979-08-27 Voest Ag Schlagleistenhalterung fuer den rotor einer prallmuehle
US4352774A (en) * 1980-03-13 1982-10-05 The Frog, Switch & Manufacturing Company Method and arrangement for support of contact elements of hammermills and the like
GB2110113A (en) * 1981-11-12 1983-06-15 Dresser Europe Sa Impeller bar for hammer type mill
GB2153704A (en) * 1984-01-27 1985-08-29 Quast Inc Roger Hammer assembly for a rotary material crusher
EP0209757A2 (fr) * 1985-07-17 1987-01-28 Hermann Schrödl Barre d'impact pour rotor d'un broyeur à impact

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT394147B (de) * 1987-10-08 1992-02-10 Noricum Maschinenbau Handel Prallmuehle
AT400229B (de) * 1989-12-06 1995-11-27 Fischer Ag Georg Einrichtung zur chargenweisen aufbereitung von schüttgut
EP0634218A1 (fr) * 1993-07-12 1995-01-18 Hermann Schrödl Rotor pour appareil broyeur
WO2015128753A1 (fr) * 2014-02-28 2015-09-03 Sgm Gantry S.P.A. Tambour de séparateur balistique pour matériaux humides

Also Published As

Publication number Publication date
EP0224836B1 (fr) 1990-10-24
DE3675165D1 (de) 1990-11-29
AT392740B (de) 1991-05-27
ATA350685A (de) 1990-11-15
EP0224836A3 (en) 1988-08-03

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