EP0265580A2 - Impact mill for crushing rock or the like - Google Patents

Impact mill for crushing rock or the like Download PDF

Info

Publication number
EP0265580A2
EP0265580A2 EP87102358A EP87102358A EP0265580A2 EP 0265580 A2 EP0265580 A2 EP 0265580A2 EP 87102358 A EP87102358 A EP 87102358A EP 87102358 A EP87102358 A EP 87102358A EP 0265580 A2 EP0265580 A2 EP 0265580A2
Authority
EP
European Patent Office
Prior art keywords
pocket
rotor
impact mill
material receiving
receiving pocket
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
EP87102358A
Other languages
German (de)
French (fr)
Other versions
EP0265580B1 (en
EP0265580A3 (en
Inventor
Günter Müller
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.)
Sbm Wageneder GmbH
Original Assignee
Sbm Wageneder GmbH
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 Sbm Wageneder GmbH filed Critical Sbm Wageneder GmbH
Publication of EP0265580A2 publication Critical patent/EP0265580A2/en
Publication of EP0265580A3 publication Critical patent/EP0265580A3/en
Application granted granted Critical
Publication of EP0265580B1 publication Critical patent/EP0265580B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B02C13/1842—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc with dead bed protected beater or impeller elements

Definitions

  • the invention relates to an impact mill for crushing stone or the like, with an approximately ring-shaped housing, the inward-facing impact surfaces of which are preferably formed by depositing a layer of crushed material, and with a on a vertical drive shaft to form an annular gap to the housing arranged rotor with an axial inlet opening, which has a base plate with a central baffle plate, a cover plate with a central recess and wings forming ejection openings between the base and cover plate, the sides of which facing the rotor axis are each provided with a pocket for holding shredded material, the discharge side of the Bag has an interchangeable wear part, which is formed by a carrier body with a hard metal strip as edge reinforcement, which preferably consists of an alloy with a tungsten carbide content of over 91%, the rest essentially cobalt, one in the ejection direction Recessing wear surface forms, whose surface section adjoining the material receiving pocket encloses an angle with a plane of contact of the edge edges of the material receiving pocket and
  • the hard metal reinforcement has an approximately L-shaped shape there, which extends radially outward from the ejection-side edge of the material pocket and in this first effective surface section encloses an angle between 180 ° and 195 ° with the plane of contact.
  • a second surface section connects to the outside, protruding beyond the rotor circumference.
  • the invention has now set itself the task of further improving such impact mills, so that their working times are determined, if possible, only by the service life of the hard metal reinforcement elements.
  • the hard metal strip has a surface which forms the inner surface of the material receiving pocket and which is approximately perpendicular to the plane of contact of the edge edges of the material receiving pocket.
  • the ejection-side inner surface of the material pocket is also reinforced, so that the grinding action of the material also processes the hard metal strip on the surface lying transversely to the ejection direction. Wear occurs on the hard metal bar not only on the wear surface that springs back from the contact plane, but the inner surface is also worn to the same extent.
  • the hard metal strips are thus completely machined, however, the carrier body lying on the bottom of the material-receiving pocket is not subjected to much stress, so that an optimal service life is achieved.
  • Approximately perpendicular to the plane of contact is understood to mean a deviation from the vertical up to 15 °, since an essentially vertical extension to the edge-near portion of the curved surface of the material which is set in the material pocket is to be achieved.
  • This curved surface is material and speed dependent and follows a spiral line. For common applications, there is an angle of approx. 95 ° to 100 ° proved to be a favorable average.
  • the recessed wear surface is convex in the shape of a circular arc, the preferably circular arc-shaped wear surface extending over a quarter circle.
  • the circular arc corresponds essentially to the ejection line of the material, so that the wear surface is worn out fairly evenly.
  • the edges between the wear surface and the mounting surface resting on the carrier body or the pocket-side inner surface of the hard metal strip are preferably rounded.
  • the support body used to support the hard metal strip in particular made of steel, is preferably essentially plate-shaped and has a bevelled contact surface for the hard metal strip.
  • the entire wearing part is designed in an L-shape, it having proven advantageous if the two pocket-side surfaces, that is to say the inner surfaces of the hard metal strip and the surface of the carrier body forming the pocket bottom, extend approximately symmetrically to a radius of the rotor.
  • the angle of symmetry is preferably 50 ° to 55 °.
  • FIG. 1 shows a vertical section through an impact mill according to the invention
  • FIG. 2 shows a horizontal section through a rotor in a first embodiment
  • FIG. 3 enlarges in detail an end of a rotor blade equipped with the wear body.
  • the impact mill according to the invention has an annular housing 1 on a substructure having the drive and the outlet opening for the comminuted material, which is approximately U-shaped in cross section, the open side facing the center. Baffles are formed in it by the material that sets in during commissioning.
  • a rotor 2 driven by the motor 3 is arranged in the housing 1 so as to be rotatable about a vertical axis 8, an annular gap 6 remaining between the rotor 2 and the housing 1, through which the shredded material falls down to the outlet opening.
  • the rotor 2 has a base plate 9, a cover plate 10 and vanes 11 arranged between them, the cover plate 10 being provided with a central opening through which the material to be comminuted, which is fed in via the filling opening 4, into the interior of the rotor 2 arrives.
  • a baffle plate 7 which distributes the material to be shredded, which accelerates in the rotor 2 with the aid of the vanes 11 and is finally thrown out through outlet openings 16 onto the baffle surfaces of the housing 1 and is thereby broken.
  • a circumferential rotor speed of 60-72 m / s is preferably selected.
  • the rotor 2 is provided with three vanes 11, which essentially extend in the circumferential direction while leaving a central area the size of the baffle plate 7.
  • Each wing 11 be consists of a three-sided part with the circumference correspondingly curved outside and inside, each inside of two wings 11 defining an ejection channel that narrows towards the outlet opening 16.
  • One of the two inner sides is concave, so that a material receiving pocket 17 is formed, in which material accumulates at the beginning of the shredding process, the surface of which forms an impact surface, thereby protecting the wing 11 from damage.
  • a contact plane B of the two edge edges of the material receiving pocket 17, in which, due to the rotor rotation, forms a material surface following a curved line 27, preferably extends essentially tangentially to the baffle plate 7 and closes with an axial plane A or a radius of the rotor (FIG. 3) an angle of preferably 35 °.
  • an exchangeable wear part protruding beyond the rotor circumference which consists of a steel carrier body 12 fastened to the wing 11 and a low-wear hard metal strip 13, especially of the type B 10 T with a tungsten carbide content of 94%, a Vickers hardness of 1450 HV and a tungsten carbide grain size between 0.002 and 0.004 mm.
  • the circumferential parts of the wings are protected by the wear parts projecting beyond the rotor circumference, so that the armor to be provided there can be given thinner.
  • Fig. 3 the end of a wing 11 equipped with the wear body is shown in detail.
  • the carrier body 12, which is fastened to the wing end by means of screws 14, has, for example, the essentially plate-shaped configuration shown.
  • the hard metal strip 13 represents part of a circular area in cross section and has an outer, circular arc-shaped wear surface 21, a inner surface 20, which forms the inner surface of the material-receiving pocket 17, and a mounting surface 22, which bears against a bevelled support surface of the carrier body 12. Its height can also be divided into several sections.
  • the hard metal strip 13 is fastened to the end of the carrier body 18, in particular soldered on, in such a way that the tangent to the wear surface 21 and the tear-off edge 24 is approximately in the contact plane B, and the inner surface 20 at an angle between 90 ° and 105 °, preferably 95 °, to the plane of contact B.
  • the width of the inner surface 20 is approximately two thirds of the radius of curvature of the wear surface 21.
  • the width of the mounting surface 22 corresponds approximately to the length of the radius of curvature, and the mounting surface 22 and the inner surface 20 close an angle between 100 ° and 115 °, preferably of 105 ° a.
  • the wearing part is thus L-shaped overall, the shorter leg being formed by the hard metal strip 13 and the longer leg being formed by the carrier body 12, and both enclosing an angle of preferably 95 ° to 110 °, preferably 105 °.
  • the overall arrangement of the wearing part is preferably such that the miter plane of the wearing part lies in an axial plane A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Graft Or Block Polymers (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

For crushing rock or the like, use is made of an impact mill which contains in an approximately annular housing a rotor (2) having an axial entry orifice. The rotor (2) has a baseplate with a central impact plate (7), a cover plate with a central recess and, between the baseplate and cover plate, blades (11) which form ejection orifices (16) and which are each equipped with a pocket (17) for receiving crushed material. The ejection side of each pocket (17) is equipped with an exchangeable wearing part which is fastened to the blade (11) and which is composed of a carrier body (12) and of a carbide strip (13). The inner face of the pocket (17) on the ejection side is formed by a face (20) of the carbide strip (13) and extends approximately perpendicularly relative to a contact plane (B) of the edges of the pocket (17). The carbide strip (13) has a wearing face (21) in the form of an arc of a circle and projects with the outer edge beyond the rotor circumference. The inner face of the carrier body (12) and the inner face (20) of the carbide strip (13) form an angle of 95 DEG to 110 DEG and extend symmetrically relative to a radius of the rotor (2). <IMAGE>

Description

Die Erfindung betrifft eine Prallmühle zum Zerkleinern von Gestein od. dg., mit einem etwa ringförmigen Gehäuse, dessen nach innen weisende Prallflächen vorzugsweise nach Ablagerung einer Schicht zerkleinerten Materials druch dieses gebildet sind, und mit einem auf einer vertikalen Antriebswelle unter Bildung eines Ringspaltes zum Gehäu­se angeordneten Rotor mit einer axialen Eintrittsöffnung, der eine Bodenplatte mit zentrischem Prallteller, eine Deckplatte mit zentrischer Ausnehmung und zwischen Boden- und Deckplatte Auswurföffnungen bildende Flügel aufweist, deren zur Rotorachse weisende Seiten jeweils mit eienr Tasche zur Aufnahme zerkleinerten Materials versehen sind, wobei die Auswurfseite der Tasche einen auswechselbaren Verschleißteil aufweist, der durch einen Trägerkörper mit einer Hartmetalleiste als Randkantenbewehrung gebildet ist, die vorzugsweise aus einer Legierung mit einem Wolf­ramcarbidanteil von über 91 %, Rest im wesentlichen Kobalt, besteht, eine in Auswurfrichtung rückspringende Verschleißfläche bildet, deren an die Materialaufnahme­tasche anschließender Flächenabschnitt einen Winkel mit einer Berührungsebene der Randkanten der Materialaufnahme­tasche einschließt und deren Außenkante über den Rotorum­fang vorsteht.The invention relates to an impact mill for crushing stone or the like, with an approximately ring-shaped housing, the inward-facing impact surfaces of which are preferably formed by depositing a layer of crushed material, and with a on a vertical drive shaft to form an annular gap to the housing arranged rotor with an axial inlet opening, which has a base plate with a central baffle plate, a cover plate with a central recess and wings forming ejection openings between the base and cover plate, the sides of which facing the rotor axis are each provided with a pocket for holding shredded material, the discharge side of the Bag has an interchangeable wear part, which is formed by a carrier body with a hard metal strip as edge reinforcement, which preferably consists of an alloy with a tungsten carbide content of over 91%, the rest essentially cobalt, one in the ejection direction Recessing wear surface forms, whose surface section adjoining the material receiving pocket encloses an angle with a plane of contact of the edge edges of the material receiving pocket and whose outer edge protrudes beyond the circumference of the rotor.

Aus der EP-OS 187252 ist eine derartige Prallmühle bereits bekannt. Die Hartmetallbewehrung weist dort eine etwa L-förmige Form auf, die sich von der auswurfseitigen Rand­kante der Materialtasche radial nach außen erstreckt und in diesem ersten wirksamen Flächenabschnitt einen Winkel zwischen 180° und 195° mit der Berührungsebene ein­schließt. Ein zweiter Flächenabschnitt schließt nach außen rückspringend an, der über den Rotorumfang ragt. Es hat sich nun gezeigt, daß die Standzeit des gesamten Verschleißteiles geringer als erwartet ist, da die aus­wurfseitige, hauptsächlich vom Trägerkörper gebildete Innenfläche der Materialaufnahmetaschen überraschend hohen Mahlbeanspruchungen ausgesetzt ist, und daher schneller abgetragen wird, als die freiliegende Hart­metalleiste.Such an impact mill is already known from EP-OS 187252. The hard metal reinforcement has an approximately L-shaped shape there, which extends radially outward from the ejection-side edge of the material pocket and in this first effective surface section encloses an angle between 180 ° and 195 ° with the plane of contact. A second surface section connects to the outside, protruding beyond the rotor circumference. It has now been shown that the service life of the entire wearing part is shorter than expected, since the ejection-side inner surface of the material-receiving pockets, which is mainly formed by the carrier body, is surprising is exposed to high grinding stresses and is therefore removed more quickly than the exposed hard metal bar.

Die Erfindung hat es sich nun zur Aufgabe gestellt, der­artige Prallmühlen weiter zu verbessern, sodaß deren Arbeitszeiten möglichst nur durch die Standzeit der Hartmetallbewehrungselemente bestimmt werden.The invention has now set itself the task of further improving such impact mills, so that their working times are determined, if possible, only by the service life of the hard metal reinforcement elements.

Erfindungsgemäß wird dies nun dadurch erreicht, daß die Hartmetalleiste eine die Innenfläche der Materialauf­nahmetasche bildende Fläche aufweist, die etwa senkrecht zur Berührungsebene der Randkanten der Materialaufnahme­tasche liegt.According to the invention, this is now achieved in that the hard metal strip has a surface which forms the inner surface of the material receiving pocket and which is approximately perpendicular to the plane of contact of the edge edges of the material receiving pocket.

Durch die erfindungsgemäße Ausbildung und Anordnung des Verschleißteiles wird, wie Versuche gezeigt haben, die auswurfseitige Innenfläche der Materialtasche ebenfalls bewehrt, sodaß die Mahlwirkung des Materials die Hart­metalleiste auch an der zur Auswurfrichtung querliegenden Fläche abarbeitet. Es tritt somit der Verschleiß der Hartmetalleiste nicht nur an der von der Berührungsebene rückspringenden Verschleißfläche ein, sondern es wird in gleichem Ausmaß auch die innenliegende Fläche abgenützt. Die Hartmetalleisten werden somit vollständig abgearbei­tet, hingegen wird der am Boden der Materialaufnahme­tasche liegende Trägerkörper wenig beansprucht, wodurch eine optimale Standzeit erreicht wird.Through the design and arrangement of the wearing part according to the invention, as tests have shown, the ejection-side inner surface of the material pocket is also reinforced, so that the grinding action of the material also processes the hard metal strip on the surface lying transversely to the ejection direction. Wear occurs on the hard metal bar not only on the wear surface that springs back from the contact plane, but the inner surface is also worn to the same extent. The hard metal strips are thus completely machined, however, the carrier body lying on the bottom of the material-receiving pocket is not subjected to much stress, so that an optimal service life is achieved.

Unter etwa senkrecht zur Berührungsebene wird dabei eine Abweichung von der Senkrechten bis zu 15° verstanden, da eine im wesentlichen senkrechte Erstreckung zum rand­kantennahen Abschnitt der sich in der Materialtasche ein­stellenden gekrümmten Oberfläche des Materials erzielt werden soll. Diese gekrümmte Oberfläche ist material- und drehzahlabhängig und folgt einer Spirallinie. Für die gängigen Anwendungsfälle hat sich ein Winkel von ca. 95° bis 100° als günstiger Mittelwert erwiesen.Approximately perpendicular to the plane of contact is understood to mean a deviation from the vertical up to 15 °, since an essentially vertical extension to the edge-near portion of the curved surface of the material which is set in the material pocket is to be achieved. This curved surface is material and speed dependent and follows a spiral line. For common applications, there is an angle of approx. 95 ° to 100 ° proved to be a favorable average.

Eine bevorzugte Ausführung sieht vor, daß die rücksprin­gende Verschleißfläche kreisbogenförmig konvex verläuft, wobei vorzugsweise die kreisbogenförmige Verschleißfläche sich über einen Viertelkreis erstreckt. Der Kreisbogen entspricht dabei im wesentlichen der Auswurflinie des Materials, sodaß die Verschleißfläche ziemlich gleich­mäßig abgenützt wird. Die Kanten zwischen der Verschleiß­fläche und der am Trägerkörper anliegenden Montagefläche bzw. der taschenseitigen Innenfläche der Hartmetalleiste sind vorzugsweise gerundet.A preferred embodiment provides that the recessed wear surface is convex in the shape of a circular arc, the preferably circular arc-shaped wear surface extending over a quarter circle. The circular arc corresponds essentially to the ejection line of the material, so that the wear surface is worn out fairly evenly. The edges between the wear surface and the mounting surface resting on the carrier body or the pocket-side inner surface of the hard metal strip are preferably rounded.

Der zur Stützung der Hartmetalleiste verwendete Träger­körper, insbesondere aus Stahl, ist vorzugsweise im wesentlichen plattenförmig ausgebildet und weist eine abgeschrägte Anlagefläche für die Hartmetalleiste auf. Der gesamte Verschleißteil ist in einer L-Form ausgebil­det, wobei es sich als vorteilhaft gezeigt hat, wenn die beiden taschenseitigen Flächen, also die Innenflächen der Hartmetalleiste und die den Taschenboden bildende Fläche des Trägerkörpers sich etwa symmetrisch zu einem Radius des Rotors erstrecken. Vorzugsweise beträgt der Symmetriewinkel 50° bis 55°.The support body used to support the hard metal strip, in particular made of steel, is preferably essentially plate-shaped and has a bevelled contact surface for the hard metal strip. The entire wearing part is designed in an L-shape, it having proven advantageous if the two pocket-side surfaces, that is to say the inner surfaces of the hard metal strip and the surface of the carrier body forming the pocket bottom, extend approximately symmetrically to a radius of the rotor. The angle of symmetry is preferably 50 ° to 55 °.

Nachstehend wird nun die Erfindung an Hand der Figuren der beiliegenden Zeichnungen näher beschrieben ohne darauf beschränkt zu sein.The invention will now be described in more detail with reference to the figures of the accompanying drawings without being limited thereto.

Die Fig. 1 zeigt einen Vertikalschnitt durch eine erfin­dungsgemäße Prallmühle, die Fig. 2 einen Horizontal­schnitt durch einen Rotor in einer ersten Ausführung, und die Fig. 3 vergrößert im Detail ein mit dem Ver­schleißkörper bestücktes Ende eines Rotorflügels.1 shows a vertical section through an impact mill according to the invention, FIG. 2 shows a horizontal section through a rotor in a first embodiment, and FIG. 3 enlarges in detail an end of a rotor blade equipped with the wear body.

Die erfindungsgemäße Prallmühle weist auf einem den An­trieb sowie die Austrittsöffnung für das zerkleinerte Material aufweisenden Unterbau ein ringförmiges Gehäuse 1 auf, daß im Querschnitt etwa U-förmig ausgebildet ist, wobei die offene Seite zur Mitte weist. Darin werden durch das sich bei der Inbetriebnahme ansetzende Material Prallflächen gebildet. Im Gehäuse 1 ist ein vom Motor 3 getriebener Rotor 2 um eine vertikale Achse 8 drehbar angeordnet, wobei zwischen dem Rotor 2 und dem Gehäuse 1 ein Ringspalt 6 verbleibt, durch den das zerkleinerte Material nach unten zur Austrittsöffnung fällt. Der Rotor 2 weist eine Bodenplatte 9, eine Deckplatte 10 und zwischen diesen angeordnete Flügel 11 auf, wobei die Deckplatte 10 mit einer zentralen Öffnung versehen ist, durch die das zu zerkleinernde Material, das über die Füllöffnung 4 aufgegeben wird, in das Innere des Rotors 2 gelangt. Unterhalb der Öffnung in der Deckplatte 10 be­findet sich ein Prallteller 7, der das zu zerkleinernde Material verteilt, das im Rotor 2 mit Hilfe der Flügel 11 beschleunigt und schließlich durch Austrittsöffnungen 16 auf die Prallflächen des Gehäuses 1 ausgeschleudert und dabei zerbrochen wird. Vorzugsweise wird eine Rotorum­fangsgeschwindigkeit von 60-72 m/s gewählt. Da der Rotor 2 naturgemäß eine starke Luftbewegung verursacht, wird eine Staubentwicklung dadurch vermieden, daß die aus dem Rotor 2 austretende Luft über Leitbleche 41 in einen Um­lenkkanal 42 eintritt, aus dem sie zur Öffnung in der Deckplatte 10 zurückgeführt wird (Pfeil D). Dadurch ent­steht ein interner Luftkreislauf, sodaß keine äußere Staubentwicklung auftritt.The impact mill according to the invention has an annular housing 1 on a substructure having the drive and the outlet opening for the comminuted material, which is approximately U-shaped in cross section, the open side facing the center. Baffles are formed in it by the material that sets in during commissioning. A rotor 2 driven by the motor 3 is arranged in the housing 1 so as to be rotatable about a vertical axis 8, an annular gap 6 remaining between the rotor 2 and the housing 1, through which the shredded material falls down to the outlet opening. The rotor 2 has a base plate 9, a cover plate 10 and vanes 11 arranged between them, the cover plate 10 being provided with a central opening through which the material to be comminuted, which is fed in via the filling opening 4, into the interior of the rotor 2 arrives. Below the opening in the cover plate 10 there is a baffle plate 7 which distributes the material to be shredded, which accelerates in the rotor 2 with the aid of the vanes 11 and is finally thrown out through outlet openings 16 onto the baffle surfaces of the housing 1 and is thereby broken. A circumferential rotor speed of 60-72 m / s is preferably selected. Since the rotor 2 naturally causes strong air movement, dust formation is avoided by the air emerging from the rotor 2 entering baffles 41 into a deflection channel 42 from which it is returned to the opening in the cover plate 10 (arrow D). This creates an internal air circuit so that no external dust is generated.

Wie aus Fig. 2 ersichtlich, ist der Rotor 2 mit drei Flügeln 11 versehen, die unter Freilassung eines Mittel­bereiches in der Größe des Pralltellers 7, sich im wesent­lichen in Umfangsrichtung erstrecken. Jeder Flügel 11 be­ steht aus einem dreiseitigen Teil mit dem Umfang entspre­chend gewölbter Außenseite und Innenseiten, wobei je eine Innenseite zweier Flügel 11 einen Auswurfkanal be­grenzt, der sich zur Austrittsöffnung 16 hin verengt. Eine der beiden Innenseiten verläuft konkav, sodaß sich dadurch eine Materialaufnahmetasche 17 ausbildet, in der sich zu Beginn des Zerkleinerungsvorganges Material an­sammelt, dessen Oberfläche eine Prallfläche bildet, wo­durch der Flügel 11 vor Beschädigung geschützt ist. Eine Berührungsebene B der beiden Randkanten der Materialauf­nahmetasche 17, in der bedingt durch die Rotordrehung eine einer gekrümmten Linie 27 folgende Materialoberfläche ausbildet, verläuft vorzugsweise im wesentlichen tangential zum Prallteller 7 und schließt mit einer Axialebene A bzw. einem Radius des Rotors (Fig. 3) einen Winkel von vorzugsweise 35° ein. Am Auswurfende des Flü­gels 11, an dem der Oberflächenschutz durch Materialan­sammlung nicht mehr möglich ist, ist ein über den Rotor­umfang vorstehender auswechselbarer Verschleißteil ange­ordnet, der aus einem am Flügel 11 befestigten Trägerkör­per 12 aus Stahl und einer verschleißarmen Hartmetall­leiste 13, vor allem der Sorte B 10 T mit einem Wolfram­carbidanteil von 94 %, einer Vickershärte von 1450 HV und einer Wolframcarbidkorngröße zwischen 0,002 und 0,004 mm besteht. Durch die über den Rotorumfang vorste­henden Verschleißteile werden die Umfangspartien der Flügel geschont, sodaß die dort vorzusehende Panzerung dünner angeführt werden kann.As can be seen from FIG. 2, the rotor 2 is provided with three vanes 11, which essentially extend in the circumferential direction while leaving a central area the size of the baffle plate 7. Each wing 11 be consists of a three-sided part with the circumference correspondingly curved outside and inside, each inside of two wings 11 defining an ejection channel that narrows towards the outlet opening 16. One of the two inner sides is concave, so that a material receiving pocket 17 is formed, in which material accumulates at the beginning of the shredding process, the surface of which forms an impact surface, thereby protecting the wing 11 from damage. A contact plane B of the two edge edges of the material receiving pocket 17, in which, due to the rotor rotation, forms a material surface following a curved line 27, preferably extends essentially tangentially to the baffle plate 7 and closes with an axial plane A or a radius of the rotor (FIG. 3) an angle of preferably 35 °. At the ejection end of the wing 11, at which surface protection due to material accumulation is no longer possible, an exchangeable wear part protruding beyond the rotor circumference is arranged, which consists of a steel carrier body 12 fastened to the wing 11 and a low-wear hard metal strip 13, especially of the type B 10 T with a tungsten carbide content of 94%, a Vickers hardness of 1450 HV and a tungsten carbide grain size between 0.002 and 0.004 mm. The circumferential parts of the wings are protected by the wear parts projecting beyond the rotor circumference, so that the armor to be provided there can be given thinner.

In Fig. 3 ist das mit dem Verschleißkörper bestückte Ende eines Flügels 11 im Detail dargestellt. Der Trägerkörper 12, der mittels Schrauben 14 am Flügelende befestigt ist, weist beispielsweise die gezeigte, im wesentlichen plat­tenförmige Ausbildung auf. Die Hartmetalleiste 13 stellt im Querschnitt einen Teil einer Kreisfläche dar und weist eine äußere, kreisbogenförmige Verschleißfläche 21, eine innere, die Innenfläche der Materialaufnahmetasche 17 bildende Fläche 20 und eine Montagefläche 22 auf, die an einer abgeschrägten Stützfläche des Trägerkörpers 12 anliegt. Sie kann in der Höhe auch in mehrere Abschnitte unterteilt sein.In Fig. 3 the end of a wing 11 equipped with the wear body is shown in detail. The carrier body 12, which is fastened to the wing end by means of screws 14, has, for example, the essentially plate-shaped configuration shown. The hard metal strip 13 represents part of a circular area in cross section and has an outer, circular arc-shaped wear surface 21, a inner surface 20, which forms the inner surface of the material-receiving pocket 17, and a mounting surface 22, which bears against a bevelled support surface of the carrier body 12. Its height can also be divided into several sections.

Die Hartmetalleiste 13 ist am Ende des Trägerkörpers 18 so befestigt, insbesondere angelötet, daß die Tangente an die Verschleißfläche 21 and der Abrißkante 24 an­nähernd in der Berührungsebene B liegt, und die innere Fläche 20 in einem Winkel zwischen 90° und 105°, vorzugs­weise 95°, zur Berührungsebene B verläuft. Die Breite der Innenfläche 20 beträgt annähernd zwei Drittel des Krümmungsradius der Verschleißfläche 21. Die Breite der Montagefläche 22 entspricht etwa der Länge des Krümmungs­radius, und die Montagefläche 22 und die innere Fläche 20 schließen einen Winkel zwischen 100° und 115°, vor­zugsweise von 105° ein. Der Verschleißteil ist somit ins­gesamt L-förmig ausgebildet, wobei der kürzere Schenkel durch die Hartmetalleiste 13 und der längere Schenkel durch den Trägerkörper 12 gebildet wird, und beide einen Winkel von vorzugsweise 95° bis 110°, vorzugsweise 105°, einschließen. Die Gesamtanordnung des Verschleißteiles ist dabei vorzugsweise so, daß die Gehrungsebene des Verschleißteiles in einer Axialebene A liegt.The hard metal strip 13 is fastened to the end of the carrier body 18, in particular soldered on, in such a way that the tangent to the wear surface 21 and the tear-off edge 24 is approximately in the contact plane B, and the inner surface 20 at an angle between 90 ° and 105 °, preferably 95 °, to the plane of contact B. The width of the inner surface 20 is approximately two thirds of the radius of curvature of the wear surface 21. The width of the mounting surface 22 corresponds approximately to the length of the radius of curvature, and the mounting surface 22 and the inner surface 20 close an angle between 100 ° and 115 °, preferably of 105 ° a. The wearing part is thus L-shaped overall, the shorter leg being formed by the hard metal strip 13 and the longer leg being formed by the carrier body 12, and both enclosing an angle of preferably 95 ° to 110 °, preferably 105 °. The overall arrangement of the wearing part is preferably such that the miter plane of the wearing part lies in an axial plane A.

Claims (7)

1. Prallmühle zum Zerkleinern von Gestein od. dgl., mit einem etwa ringförmigen Gehäuse, dessen nach innen weisende Prallflächen vorzugsweise nach Ablagerung einer Schicht zerkleinerten Materials durch dieses gebildet sind, und mit einem auf einer vertikalen An­treibswelle unter Bildung eines Ringspaltes zum Ge­häuse angeordneten Rotor mit einer axialen Eintritts­öffnung, der eine Bodenplatte mit zentrischem Prall­teller, eine Deckplatte mit zentrischer Ausnehmung und zwischen Boden- und Deckplatte Auswurföffnungen bildende Flügel aufweist, deren zur Rotorachse wei­sende Seiten jeweils mit einer Tasche zur Aufnahme zerkleinerten Materials versehen sind, wobei die Aus­wurfseite der Tasche einen auswechselbaren Verschleiß­teil aufweist, der durch einen Trägerkörper mit einer Hartmetallleiste als Randkantenbewehrung gebildet ist, die vorzugsweise aus einer Legierung mit einem Wolfram­carbidanteil von über 91 %, Rest im wesentlichen Kobalt, besteht, eine in Auswurfrichtung rückspringende Verschleißfläche bildet, deren an die Materialaufnahme­tasche anschließender Flächenabschnitt einen Winkel mit einer Berührungsebene der Randkanten der Material­aufnahmetasche einschließt und deren Außenkante über den Rotorumfang vorsteht, dadurch gekennzeichnet, daß die Hartmetalleiste (13) eine die Innenfläche der Ma­terialaufnahmetasche (17) bildende Fläche (20) auf­weist, die etwa senkrecht zur Berührungsebene (B) der Randkanten der Materialaufnahmetasche (17) liegt.1. Impact mill for crushing rock or the like, with an approximately ring-shaped housing, the inward-facing impact surfaces of which are preferably formed by depositing a layer of crushed material, and with a rotor arranged on a vertical drive shaft to form an annular gap to the housing with an axial inlet opening, which has a base plate with a central baffle plate, a cover plate with a central recess and wings forming ejection openings between the base and cover plate, the sides of which facing the rotor axis are each provided with a pocket for holding shredded material, the ejection side of the pocket being one interchangeable wear part, which is formed by a carrier body with a hard metal strip as edge reinforcement, which preferably consists of an alloy with a tungsten carbide content of over 91%, the rest essentially cobalt, a V recessed in the direction of ejection forms the wear surface, the surface section adjoining the material receiving pocket encloses an angle with a plane of contact of the edge edges of the material receiving pocket and the outer edge of which protrudes beyond the rotor circumference, characterized in that the hard metal strip (13) has a surface (20) forming the inner surface of the material receiving pocket (17) , which is approximately perpendicular to the plane of contact (B) of the marginal edges of the material receiving pocket (17). 2. Prallmühle nach Anspruch 1, dadurch gekennzeichnet, daß die rückspringende Verschleißfläche (21) kreis­bogenförmig konvex verläuft.2. Impact mill according to claim 1, characterized in that the recessed wear surface (21) is convex in the shape of a circular arc. 3. Prallmühle nach Anspruch 2, dadurch gekennzeichnet, daß die kreisbogenförmige Verschleißfläche (21) sich über einen Viertelkreis erstreckt.3. Impact mill according to claim 2, characterized in that the arcuate wear surface (21) extends over a quarter circle. 4. Prallmühle nach Anspruch 1, dadurch gekennzeichnet, daß die in der Materialaufnahmetasche (17) liegende, innere Fläche (20) der Hartmetalleiste (13) einen Winkel (α) von etwa 95° mit der Berührungsebene (B) einschließt.4. impact mill according to claim 1, characterized in that in the material receiving pocket (17) lying, inner surface (20) of the hard metal strip (13) includes an angle (α) of about 95 ° with the contact plane (B). 5. Prallmühle nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Montagefläche (22) und die in der Materialaufnahmetasche (17) liegende innere Fläche (20) einen Winkel von 105° einschließen.5. Impact mill according to one of claims 1 to 4, characterized in that the mounting surface (22) and the inner surface (20) lying in the material receiving pocket (17) enclose an angle of 105 °. 6. Prallmühle nach Anspruch 5, dadurch gekennzeichnet, daß die Kante zwischen der Verschleißfläche (21) und der Montagefläche (22) gerundet ist.6. Impact mill according to claim 5, characterized in that the edge between the wear surface (21) and the mounting surface (22) is rounded. 7. Prallmühle nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Trägerkörper (12) im wesent­lichen plattenförmig ausgebildet ist, und eine abge­schrägte Stützfläche für die Montagefläche (22) der Hartmetalleiste (13) aufweist.7. impact mill according to one of claims 1 to 6, characterized in that the carrier body (12) is substantially plate-shaped, and has a bevelled support surface for the mounting surface (22) of the hard metal strip (13).
EP87102358A 1986-10-30 1987-02-19 Impact mill for crushing rock or the like Expired - Lifetime EP0265580B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2882/86 1986-10-30
AT0288286A AT390568B (en) 1986-10-30 1986-10-30 IMPACT MILL FOR CRUSHING STONE OD. DGL.

Publications (3)

Publication Number Publication Date
EP0265580A2 true EP0265580A2 (en) 1988-05-04
EP0265580A3 EP0265580A3 (en) 1989-01-25
EP0265580B1 EP0265580B1 (en) 1991-04-24

Family

ID=3541797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102358A Expired - Lifetime EP0265580B1 (en) 1986-10-30 1987-02-19 Impact mill for crushing rock or the like

Country Status (6)

Country Link
EP (1) EP0265580B1 (en)
AT (2) AT390568B (en)
AU (1) AU593401B2 (en)
DE (2) DE8630185U1 (en)
GB (1) GB2198060B (en)
HU (2) HU198860B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388825A2 (en) * 1989-03-21 1990-09-26 SBM WAGENEDER Gesellschaft m.b.H. Wear element for an impact mill rotor
WO1995011086A1 (en) * 1993-10-22 1995-04-27 Barmac Associates Limited Mineral breakers
EP0835690A1 (en) 1996-10-11 1998-04-15 Van der Zanden, Johannes Petrus Andreas Josephus Method and device for synchronously impact milling of material
US5866006A (en) * 1990-07-09 1999-02-02 Upfront Chromatography A/S Coated single particles and their use in fluid bed chromatography
EP1268072A1 (en) * 2000-02-07 2003-01-02 Metso Minerals (Matamata) Limited Rotary mineral breakers
CN103949305A (en) * 2014-05-13 2014-07-30 济南大学 Novel rotor of crusher

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610217B1 (en) * 1987-01-30 1991-08-16 Alsthom ROTARY CRUSHER WITH SELF-PROTECTED SPRAY BLADES
US4940188A (en) * 1987-12-24 1990-07-10 John Rodriguez Tip holder for mineral breaker
JPH0783837B2 (en) * 1988-12-05 1995-09-13 コトブキ技研工業株式会社 Centrifugal crusher and its crushing method and crushed piece sorting method
JP2766058B2 (en) * 1990-08-31 1998-06-18 株式会社神戸製鋼所 Vertical impact crusher
AU651864B2 (en) * 1991-02-15 1994-08-04 Ronald Frederick Bourne Treatment of particulate material
US5137220A (en) * 1991-04-04 1992-08-11 Canica Crushers, Inc. Mounting apparatus for impeller for a centrifugal impact crusher
DE4338331A1 (en) * 1993-11-10 1995-05-11 Braun Ernst Hammer breaker
CN109261292A (en) * 2018-10-31 2019-01-25 郑州市正升重工科技有限公司 A kind of high-efficiency sand making machine rotor
CN110270410A (en) * 2019-06-19 2019-09-24 枣庄鑫金山智能机械股份有限公司 A kind of sand making machine thrower head

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174697A (en) * 1962-07-30 1965-03-23 Adams Engineering Impeller
EP0166674A2 (en) * 1984-06-27 1986-01-02 Rexnord Inc. Convertible vertical shaft impact crusher
EP0187252A2 (en) * 1984-12-04 1986-07-16 SBM WAGENEDER Gesellschaft m.b.H. Impact pulverizer for the size reduction of rock or the like
DE3610974A1 (en) * 1986-04-02 1987-10-08 Bhs Bayerische Berg Horizontal centrifugal mill, in particular for comminuting abrasive rock

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090673A (en) * 1977-02-18 1978-05-23 Canica Crushers Ltd. Centrifugal impact rock crushers
NZ201190A (en) * 1982-08-07 1986-07-11 Barmac Ass Ltd Additional wear tip for rotary mineral breaker
AU3535884A (en) * 1983-11-18 1985-05-23 Acrowood Corporation Centrifugal impact crusher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174697A (en) * 1962-07-30 1965-03-23 Adams Engineering Impeller
EP0166674A2 (en) * 1984-06-27 1986-01-02 Rexnord Inc. Convertible vertical shaft impact crusher
EP0187252A2 (en) * 1984-12-04 1986-07-16 SBM WAGENEDER Gesellschaft m.b.H. Impact pulverizer for the size reduction of rock or the like
DE3610974A1 (en) * 1986-04-02 1987-10-08 Bhs Bayerische Berg Horizontal centrifugal mill, in particular for comminuting abrasive rock

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388825A2 (en) * 1989-03-21 1990-09-26 SBM WAGENEDER Gesellschaft m.b.H. Wear element for an impact mill rotor
EP0388825A3 (en) * 1989-03-21 1990-12-19 Sbm Wageneder Gesellschaft M.B.H. Wear element for an impact mill rotor
US5866006A (en) * 1990-07-09 1999-02-02 Upfront Chromatography A/S Coated single particles and their use in fluid bed chromatography
US5935442A (en) * 1990-07-09 1999-08-10 Upfront Chromatography A/S Liquid fluid bed chromatography using conglomerates of controlled density
WO1995011086A1 (en) * 1993-10-22 1995-04-27 Barmac Associates Limited Mineral breakers
EP0835690A1 (en) 1996-10-11 1998-04-15 Van der Zanden, Johannes Petrus Andreas Josephus Method and device for synchronously impact milling of material
EP1268072A1 (en) * 2000-02-07 2003-01-02 Metso Minerals (Matamata) Limited Rotary mineral breakers
EP1268072A4 (en) * 2000-02-07 2006-05-17 Metso Minerals Matamata Ltd Rotary mineral breakers
CN103949305A (en) * 2014-05-13 2014-07-30 济南大学 Novel rotor of crusher

Also Published As

Publication number Publication date
GB2198060B (en) 1991-06-26
HUT48131A (en) 1989-05-29
GB8724831D0 (en) 1987-11-25
DE3769584D1 (en) 1991-05-29
GB2198060A (en) 1988-06-08
HU198860B (en) 1989-12-28
DE8630185U1 (en) 1987-01-08
EP0265580B1 (en) 1991-04-24
AU593401B2 (en) 1990-02-08
ATE62831T1 (en) 1991-05-15
ATA288286A (en) 1989-11-15
EP0265580A3 (en) 1989-01-25
AU8052787A (en) 1988-05-05
AT390568B (en) 1990-05-25

Similar Documents

Publication Publication Date Title
AT390568B (en) IMPACT MILL FOR CRUSHING STONE OD. DGL.
DE3301186A1 (en) HAMMER MILL WITH A ROTOR HAVING CAPS WITH DISC
DE3821360C2 (en)
EP0676240A1 (en) Method and device for milling materials of different granular sizes, especially air-swept mill
DE102015221425A1 (en) Processing device, as well as conditioning element and wall cladding element for such a treatment device
EP0187252A2 (en) Impact pulverizer for the size reduction of rock or the like
EP0792191A1 (en) Roller mill
DE102016101839A1 (en) Grinder, mill, coffee preparation device with mill and grinding process
DE3040706A1 (en) MILL WITH SIGHT
AT394501B (en) Replaceable wearing part for the rotor of an impact mill
EP3383542B1 (en) Millstone arrangement for a flat burr grinder for grinding material to be ground
EP0388825B1 (en) Wear element for an impact mill rotor
DE865249C (en) Cutting mill
DE3508934A1 (en) Impact mill for comminuting stones or the like
DE4419510B4 (en) Bat for impact mills
DE102009045308B4 (en) Mill for grinding regrind
DE202009019131U1 (en) Whirlwind mill and grinding tool for it
AT381245B (en) Impact mill for comminuting rock and the like
DE2622931A1 (en) SHREDDING MACHINE
DE3926203A1 (en) Impact pulveriser with rotor and impact plates - has rotor with radial apertures, between which extend impact faces
DE10053652C2 (en) Impact wheel for a fan mill
DE202011102435U1 (en) millstones
DE524146C (en) Shredding device
DE4037036C1 (en) Impact stone crusher with trough-shaped housing - has aresting wedge displaceable orthogonally in guide groove wall
DE3116159A1 (en) Method for impact comminuting hard materials such as hard stone or the like and impact crusher for carrying out the method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE FR IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR IT LI

17P Request for examination filed

Effective date: 19890317

17Q First examination report despatched

Effective date: 19891030

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR IT LI

REF Corresponds to:

Ref document number: 62831

Country of ref document: AT

Date of ref document: 19910515

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3769584

Country of ref document: DE

Date of ref document: 19910529

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19940414

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19950219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050219

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20060111

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20060130

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060228

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL