EP0496721A1 - Rotational jaw crusher - Google Patents

Rotational jaw crusher Download PDF

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Publication number
EP0496721A1
EP0496721A1 EP92890002A EP92890002A EP0496721A1 EP 0496721 A1 EP0496721 A1 EP 0496721A1 EP 92890002 A EP92890002 A EP 92890002A EP 92890002 A EP92890002 A EP 92890002A EP 0496721 A1 EP0496721 A1 EP 0496721A1
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European Patent Office
Prior art keywords
crushing
rotor
jaw crusher
rotation
bars
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EP92890002A
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German (de)
French (fr)
Inventor
Hermann Schrödl
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
    • B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate

Definitions

  • the invention relates to a rotary jaw crusher with a rotor rotating within a housing about a horizontal axis of rotation, receiving at least one rotating jaw, and a fixed jaw fixed to the housing and arranged substantially above the descending region of the rotor rotating circuit, which opposes the inclination at a flat angle with respect to the horizontal
  • the direction of rotation of the rotor extends towards the opening of the housing and has breakers or the like protruding on the rotor side.
  • jaw crushers are also known in which two crushing jaws swing relative to one another interact and crush the material to be crushed between them.
  • These crushing jaws can be equipped with blades running in the direction of the fall in order to improve the crushing effect, but here the achievable crushing performance is low due to the reversal of movement in the jaw movement and the limited number of strokes and stroke distances despite high energy expenditure.
  • Hammer mills are comminution machines which have rotors equipped with pivotable hammers and baffles assigned to them, the baffle plates being able to carry projecting tear fingers between which the rotor hammers pass.
  • these hammer mills are unsuitable from the outset due to the relatively low impact energy of their hammers for crushing coarse, hard rock.
  • the invention is therefore based on the object of providing a rotary jaw crusher of the type described at the outset, which corresponds in its function to a combination of jaw crusher and impact crusher and which provides the best grinding performance with high efficiencies and low susceptibility to wear.
  • the invention solves this problem in that the fixed jaw has break bars extending approximately normal to the rotor axis of rotation, which are provided with cutting edges. It has been found that even large and hard starting pieces break when subjected to high compressive stresses, even if the compressive stress acts only briefly on a small part of the surface of these pieces. By means of the cutting-forming break bars, the rotational energy of the rotor can now be transferred to the essentially stationary material and converted into high compressive stresses, so that the desired crushing effect is largely independent of the output size of the material occurs quickly and effectively, with the inherent movement of the material within the housing being reduced to a minimum. There is a high degree of efficiency with little wear and a limited amount of dust.
  • the fixed jaw is equipped with chisel-like crushing bodies in addition to the cutting-forming crushing bars, which sit between and / or on the crushing bars, stress peaks arise when these crushing bodies are placed on the material to be crushed, which increase the explosive effect on the material and already with low energy result in a high shredding performance.
  • the crushing bodies can fix the material for crushing and prevent major material movements.
  • crushing bars of different heights and / or lengths are provided, the cutting edges of these crushing bars do not rest on the material to be comminuted at the same time, but one after the other, which increases the compressive stresses achievable by the individual blades and increases the comminution effect.
  • a similar situation is achieved if the crushing bodies protrude beyond the cutting edges of the crushing bars, as a result of which first the crushing bodies and then the cutting edges take effect.
  • the material to be shredded can also be on the rotor side the cutting bodies are forced to stress peaks, which accelerate and intensify the shredding process.
  • the material to be shredded should be held as tight as possible when breaking.
  • An improvement of this material fixation is achieved if, according to the invention, the crushing bodies form front crushing edges facing the insertion opening, which essentially have a course inclined to the horizontal by an angle of more than 30 °, preferably by an angle of 40 ° to 80 °, which means that introduced material can be directed into the wedge gap between the rotor circuit and the fixed jaw.
  • the fixing and breaking behavior can also be favorably influenced by the fact that a straight extension of the breaking edge of the uppermost crushing body possibly intersects the rotor circuit in an arc region that extends 20 ° in and 90 ° from the vertex of the circuit to the direction of rotation of the rotor, which extension also can pass above the circulation loop.
  • a breaking edge and breaking body position makes it possible to correctly grasp the material right in the throw-in area and to pass it on in a breakable manner.
  • the rotary jaw crusher 1 consists of a machine housing 2 which forms an upper insertion opening 3 and a lower ejection opening 4.
  • a rotor 5 is rotatably mounted about a horizontal axis 6, which has firmly anchored rotating jaws 7 with radial cutting bodies 8 and axially parallel striking bars 9.
  • the circulating jaws 7 cooperate with a fixed jaw 10 which is fixed to the housing and extends essentially above the descending area of the rotor circulation circuit transversely between the housing side walls 2a and, contrary to the direction of rotation of the rotor, rises at an acute angle to the horizontal towards the insertion opening 3.
  • the fixed jaw 10 is supported in an adjustable manner, for which purpose corresponding hydraulic drives 11 and lever linkages 12 are used, and a pressure limitation device 13, which is only indicated, permits the setting of the maximum pressure in the hydraulic system and offers overload protection.
  • a grinding plate 14 Arranged below the fixed jaw 10 is a grinding plate 14, the position of which can be adjusted by means of adjusting members 15 and which limits the constriction between the fixed jaw 10 and the rotor circuit.
  • a curved grinding track 16 which can also be changed in its position via an adjusting device 17, can be connected to the grinding plate 14.
  • the fixed jaw 10 is now normal to the rotor axis of rotation 6 in order to ensure the desired comminution effect extending crushing bars 18, which form cutting edges 18a, and in addition to the crushing bars, the fixed jaw is equipped with chisel-like crushing bodies 19, wherein the crushing bodies 19 can sit on and / or between the crushing bars 18.
  • the crushing bars 18 may also have saw-like notches 20 and, depending on the structural conditions of the machine housing 2, it is possible to pull the crushing bars 18 upward beyond the area equipped with the crushing body and towards the insertion opening 4 (FIGS. 2 and 4).
  • the feed material is thrown in through the insertion opening 3 and reaches the rotor 5, which takes it along with its rotating jaws 7 and moves it against the fixed jaw 10.
  • the feed material is pressed against the cutting edges 18a of the crushing bars 18 and the crushing bodies 19, the flat inclination of the fixed jaw 10 and the narrowing gap between the rotor 5 and the fixed jaw 10 bringing an ever increasing indentation with it, so that the material transferred compressive stresses until the material breaks.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

A rotational jaw crusher (1) has a rotor (5) which rotates within a housing (2) about a horizontal axis of rotation (6) and which receives at least one orbiting jaw (7). The jaw crusher (1) is equipped with a jaw (10) which is fixed with respect to the housing, is arranged substantially above the falling region of the rotor's circle of rotation and extends in an inclination rising flatly in relation to the horizontal, rising inclination, against the rotor's direction of rotation, towards the charging opening (3) of the housing (2). To achieve a high working efficiency and low liability to wear, breaker bars (18) which form cutting edges are provided on the fixed jaw (10), running approximately normal to the rotor's axis of rotation (6). <IMAGE>

Description

Die Erfindung bezieht sich auf einen Rotationsbackenbrecher mit einem innerhalb eines Gehäuses um eine horizontale Drehachse umlaufenden, wenigstens eine Umlaufbacke aufnehmenden Rotor und einer gehäusefesten, im wesentlichen oberhalb des absteigenden Bereiches des Rotorumlaufkreises angeordneten Festbacke, die sich in einer gegenüber der Horizontalen flach ansteigenden Neigung entgegen der Rotordrehrichtung zur Einwurföffnung des Gehäuses hin erstreckt und rotorseitig vorstehende Brechleisten od. dgl. besitzt.The invention relates to a rotary jaw crusher with a rotor rotating within a housing about a horizontal axis of rotation, receiving at least one rotating jaw, and a fixed jaw fixed to the housing and arranged substantially above the descending region of the rotor rotating circuit, which opposes the inclination at a flat angle with respect to the horizontal The direction of rotation of the rotor extends towards the opening of the housing and has breakers or the like protruding on the rotor side.

Wie aus der FR-A 2 580 193 hervorgeht, gibt es bereits Prallbrecher mit ähnlichen Rotoren und einer Prallplatte, die parallel zur Rotordrehachse verlaufende und schneidenlose Prallkörper bildende Brechleisten aufweist. Die Zerkleinerungswirkung dieser Prallbrecher ergibt sich durch den Aufprall des vom Rotor weggeschleuderten Materials auf den Prallflächen und Brechleisten der Prallplatte, was einen recht hohen Verschleiß mit sich bringt und wegen des hohen Anteils von Bewegungs- und Reibungsarbeit beim Zerkleinern nur zu einem verhältnismäßig geringen Wirkungsgrad führt.As is apparent from FR-A 2 580 193, there are already impact crushers with similar rotors and an impact plate which has crushing bars which run parallel to the rotor axis of rotation and form cutting bodies without cutting edges. The crushing effect of these impact crushers results from the impact of the material thrown away by the rotor on the impact surfaces and crushing bars of the impact plate, which results in quite high wear and, due to the high proportion of movement and friction work during crushing, only leads to a relatively low efficiency.

Neben den Prallbrechern sind auch Backenbrecher bekannt, bei denen zwei relativ zueinander schwingende Brechbacken zusammenwirken und das Zerkleinerungsgut zwischen sich zerkleinern. Diese Brechbacken können dabei mit in Fallrichtung verlaufenden Schneiden ausgestattet sein, um die Zerkleinerungswirkung zu verbessern, doch ist hier aufgrund der Bewegungsumkehr bei der Backenbewegung und der begrenzten Hubzahlen und Hubwege trotz hohen Energieaufwandes die erreichbare Zerkleinerungsleistung gering.In addition to the impact crushers, jaw crushers are also known in which two crushing jaws swing relative to one another interact and crush the material to be crushed between them. These crushing jaws can be equipped with blades running in the direction of the fall in order to improve the crushing effect, but here the achievable crushing performance is low due to the reversal of movement in the jaw movement and the limited number of strokes and stroke distances despite high energy expenditure.

Hammermühlen wiederum sind Zerkleinerungsmaschinen, die mit schwenkbaren Hämmern ausgerüstete Rotoren und diesen zugeordnete Prallplatten aufweisen, wobei die Prallplatten vorstehende Reißfinger tragen können, zwischen denen die Rotorhämmer hindurchschlagen. Diese Hammermühlen sind aber von vornherein wegen der relativ geringen Schlagenergie ihrer Hämmer für die Zerkleinerung von grobstückigem, hartem Gestein ungeeignet.Hammer mills, in turn, are comminution machines which have rotors equipped with pivotable hammers and baffles assigned to them, the baffle plates being able to carry projecting tear fingers between which the rotor hammers pass. However, these hammer mills are unsuitable from the outset due to the relatively low impact energy of their hammers for crushing coarse, hard rock.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Rotationsbackenbrecher der eingangs geschilderten Art zu schaffen, der in seiner Funktion einer Kombination aus Backenbrecher und Prallbrecher entspricht und bei hohen Wirkungsgraden und geringer Verschleißanfälligkeit beste Zerkleinerungsleistungen erbringt.The invention is therefore based on the object of providing a rotary jaw crusher of the type described at the outset, which corresponds in its function to a combination of jaw crusher and impact crusher and which provides the best grinding performance with high efficiencies and low susceptibility to wear.

Die Erfindung löst diese Aufgabe dadurch, daß die Festbacke etwa normal zur Rotordrehachse verlaufende Brechleisten aufweist, die mit Schneiden versehen sind. Es hat sich herausgestellt, daß selbst große und harte Ausgangsstücke durch eine Beaufschlagung mit hohen Druckspannungen brechen, auch wenn die Druckspannung nur kurzzeitig auf einen kleinen Oberflächenteil dieser Stücke einwirkt. Durch die schneidenbildenden Brechleisten kann nun die Rotationsenergie des Rotors auf das im wesentlichen ruhende Material übertragen und in hohe Druckspannungen umgesetzt werden, so daß der gewünschte Zerkleinerungseffekt weitgehend unabhängig von der Ausgangsgröße des Materials rasch und wirkungsvoll auftritt, wobei die Eigenbewegung des Materials innerhalb des Gehäuses auf ein Minimum reduziert wird. Es kommt zu einem hohen Wirkungsgrad bei geringen Verschleißerscheinungen und einer begrenzten Staubentwicklung.The invention solves this problem in that the fixed jaw has break bars extending approximately normal to the rotor axis of rotation, which are provided with cutting edges. It has been found that even large and hard starting pieces break when subjected to high compressive stresses, even if the compressive stress acts only briefly on a small part of the surface of these pieces. By means of the cutting-forming break bars, the rotational energy of the rotor can now be transferred to the essentially stationary material and converted into high compressive stresses, so that the desired crushing effect is largely independent of the output size of the material occurs quickly and effectively, with the inherent movement of the material within the housing being reduced to a minimum. There is a high degree of efficiency with little wear and a limited amount of dust.

Ist die Festbacke zusätzlich zu den schneidenbildenden Brechleisten mit meißelartigen Brechkörpern bestückt, die zwischen und/oder auf den Brechleisten sitzen, entstehen beim Aufsetzen dieser Brechkörper auf dem zu brechenden Material Spannungsspitzen, die zu einer Vergößerung der Sprengwirkung für das Material sorgen und schon mit geringer Energie eine hohe Zerkleinerungsleistung ergeben. Außerdem können die Brechkörper das Material zum Zerkleinern fixieren und größere Eigenbewegungen des Materials unterbinden.If the fixed jaw is equipped with chisel-like crushing bodies in addition to the cutting-forming crushing bars, which sit between and / or on the crushing bars, stress peaks arise when these crushing bodies are placed on the material to be crushed, which increase the explosive effect on the material and already with low energy result in a high shredding performance. In addition, the crushing bodies can fix the material for crushing and prevent major material movements.

Sind unterschiedlich hohe und/oder lange Brechleisten vorgesehen, setzen die Schneiden dieser Brechleisten nicht gleichzeitig, sondern hintereinander auf dem zu zerkleinernden Material auf, was die durch die einzelnen Schneiden erzielbaren Druckspannungen erhöht und den Zerkleinerungseffekt steigert. Ähnliches wird erreicht, wenn die Brechkörper die Schneiden der Brechleisten überragen, wodurch zuerst die Brechkörper und dann die Schneiden wirksam werden.If crushing bars of different heights and / or lengths are provided, the cutting edges of these crushing bars do not rest on the material to be comminuted at the same time, but one after the other, which increases the compressive stresses achievable by the individual blades and increases the comminution effect. A similar situation is achieved if the crushing bodies protrude beyond the cutting edges of the crushing bars, as a result of which first the crushing bodies and then the cutting edges take effect.

Günstig ist es weiters, wenn sich die Brechleisten über den brechkörperbestückten Bereich der Festbacke hinaus zur Einwurföffnung hin erstrecken, da sich dadurch eine Einwurfführung für das Material ergibt und es hier zu einer Art Vorzerkleinerung kommen kann.It is also expedient if the crushing bars extend beyond the area of the fixed jaw equipped with crushing bodies to the insertion opening, since this results in an insertion guide for the material and a kind of pre-shredding can occur here.

Sind den Brechkörpern der Festbacke radiale Schneidkörper der Umlaufbacken zugeordnet, können zusätzlich zu den Brechkörpern dem zu zerkleinernden Material auch rotorseitig über die Schneidkörper Spannungsspitzen aufgezwungen werden, die den Zerkleinerungsvorgang beschleunigen und verstärken.If radial crushing bodies of the rotating jaws are assigned to the crushing bodies of the fixed jaw, in addition to the crushing bodies, the material to be shredded can also be on the rotor side the cutting bodies are forced to stress peaks, which accelerate and intensify the shredding process.

Eine Erhöhung der Zerkleinerungswirkung ergibt sich auch dadurch, daß die Schneiden der Brechleisten sägeartige Einkerbungen aufweisen, wodurch beim Aufsetzen der Schneiden auf das zu zerkleinernde Material Druckspannungen unterschiedlicher Intensität entstehen und die Sprengwirkung gesteigert wird.An increase in the crushing effect also results from the fact that the cutting edges of the crushing bars have saw-like notches, as a result of which compressive stresses of different intensities arise when the cutting edges are placed on the material to be crushed and the explosive effect is increased.

Um Leistungsverluste zu minimieren, soll das zu zerkleinernde Material beim Brechen möglichst festgehalten werden. Eine Verbesserung dieser Materialfixierung wird erreicht, wenn erfindungsgemäß die Brechkörper der Einwurföffnung zugewandte vordere Brechkanten bilden, die im wesentlichen einen zur Horizontalen um einen Winkel von mehr als 30 °, vorzugsweise um einen Winkel von 40 ° bis 80 °, geneigten Verlauf besitzen, wodurch das eingebrachte Material in den Keilspalt zwischen Rotorumlaufkreis und Festbacke gelenkt werden kann.In order to minimize loss of performance, the material to be shredded should be held as tight as possible when breaking. An improvement of this material fixation is achieved if, according to the invention, the crushing bodies form front crushing edges facing the insertion opening, which essentially have a course inclined to the horizontal by an angle of more than 30 °, preferably by an angle of 40 ° to 80 °, which means that introduced material can be directed into the wedge gap between the rotor circuit and the fixed jaw.

Das Fixier- und Brechverhalten läßt sich auch dadurch günstig beeinflussen, daß eine geradlinige Verlängerung der Brechkante des obersten Brechkörpers gegebenenfalls den Rotorumlaufkreis in einem Bogenbereich schneidet, der sich vom Scheitelpunkt des Umlaufkreises 20 ° in und 90 ° gegen die Rotordrehrichtung erstreckt, welche Verlängerung aber auch oberhalb des Umlaufkreises vorbeiführen kann. Eine solche Brechkanten- und Brechkörperlage erlaubt es, das Material gleich im Einwurfbereich richtig zu erfassen und brechgerecht weiterzuleiten.The fixing and breaking behavior can also be favorably influenced by the fact that a straight extension of the breaking edge of the uppermost crushing body possibly intersects the rotor circuit in an arc region that extends 20 ° in and 90 ° from the vertex of the circuit to the direction of rotation of the rotor, which extension also can pass above the circulation loop. Such a breaking edge and breaking body position makes it possible to correctly grasp the material right in the throw-in area and to pass it on in a breakable manner.

In der Zeichnung ist der Erfindungsgegenstand schematisch veranschaulicht, und zwar zeigen

  • Fig. 1 und 2 zwei Ausführungsbeispiele eines erfindungsgemäßen Rotationsbackenbrechers im Vertikalschnitt normal zur Rotordrehachse,
  • Fig. 3 einen Querschnitt nach der Linie III-III der Fig. 1 und die
  • Fig. 4 und 5 zwei Ausführungsbeispiele der Festbacke dieses Rotationsbackenbrechers jeweils im Schnitt parallel zu den Brechleisten.
In the drawing, the subject matter of the invention is illustrated schematically, namely show
  • 1 and 2 two embodiments of an inventive Rotary jaw crusher in vertical section normal to the axis of rotation of the rotor,
  • Fig. 3 shows a cross section along the line III-III of Fig. 1 and
  • 4 and 5 two embodiments of the fixed jaw of this rotary jaw crusher, each in section parallel to the crushing bars.

Der erfindungsgemäße Rotationsbackenbrecher 1 besteht aus einem Maschinengehäuse 2, das eine obere Einwurföffnung 3 und eine untere Auswurföffnung 4 bildet. Im Maschinengehäuse 2 ist ein Rotor 5 um eine horizontale Achse 6 drehbar gelagert, der fest verankerte Umlaufbacken 7 mit radialen Schneidkörpern 8 und achsparallelen Schlagbalken 9 aufweist. Mit den Umlaufbacken 7 wirkt eine gehäusefeste Festbacke 10 zusammen, die sich im wesentlichen oberhalb des absteigenden Bereiches des Rotorumlaufkreises quer zwischen den Gehäuseseitenwänden 2a erstreckt und entgegen der Rotordrehrichtung im spitzen Winkel zur Horizontalen nach oben zur Einwurföffnung 3 hin ansteigt. Die Festbacke 10 ist verstellbar abgestützt, wozu entsprechende Hydrauliktriebe 11 und Hebelgestänge 12 dienen, und eine nur angedeutete Druckbegrenzungseinrichtung 13 erlaubt die Einstellung des Maximaldrukkes im Hydrauliksystem und bietet eine Überlastsicherung.The rotary jaw crusher 1 according to the invention consists of a machine housing 2 which forms an upper insertion opening 3 and a lower ejection opening 4. In the machine housing 2, a rotor 5 is rotatably mounted about a horizontal axis 6, which has firmly anchored rotating jaws 7 with radial cutting bodies 8 and axially parallel striking bars 9. The circulating jaws 7 cooperate with a fixed jaw 10 which is fixed to the housing and extends essentially above the descending area of the rotor circulation circuit transversely between the housing side walls 2a and, contrary to the direction of rotation of the rotor, rises at an acute angle to the horizontal towards the insertion opening 3. The fixed jaw 10 is supported in an adjustable manner, for which purpose corresponding hydraulic drives 11 and lever linkages 12 are used, and a pressure limitation device 13, which is only indicated, permits the setting of the maximum pressure in the hydraulic system and offers overload protection.

Unterhalb der Festbacke 10 ist eine Mahlplatte 14 angeordnet, die über Verstellorgane 15 in ihrer Lage einstellbar ist und die Engstelle zwischen Festbacke 10 und Rotorumlaufkreis begrenzt. Zur Nachzerkleinerung kann an die Mahlplatte 14 eine gekrümmte Mahlbahn 16, die sich über eine Verstelleinrichtung 17 ebenfalls in ihrer Lage verändern läßt, anschließen.Arranged below the fixed jaw 10 is a grinding plate 14, the position of which can be adjusted by means of adjusting members 15 and which limits the constriction between the fixed jaw 10 and the rotor circuit. For subsequent comminution, a curved grinding track 16, which can also be changed in its position via an adjusting device 17, can be connected to the grinding plate 14.

Die Festbacke 10 ist nun, um die gewünschte Zerkleinerungswirkung zu gewährleisten, mit normal zur Rotordrehachse 6 verlaufenden Brechleisten 18 ausgestattet, die Schneiden 18a bilden, und außerdem ist die Festbacke zusätzlich zu den Brechleisten mit meißelartigen Brechkörpern 19 bestückt, wobei die Brechkörper 19 auf und/oder zwischen den Brechleisten 18 sitzen können. Es gibt unterschiedlich hohe Brechleisten 18 und die Brechkörper 19 überragen die Schneiden 18a der Brechleisten. Die Brechleisten 18 können außerdem sägeartige Einkerbungen 20 aufweisen und je nach den baulichen Gegebenheiten des Maschinengehäuses 2 ist es möglich, die Brechleisten 18 über den brechkörperbestückten Bereich hinaus aufwärts zur Einwurföffnung 4 hin hochzuziehen (Fig. 2 und 4).The fixed jaw 10 is now normal to the rotor axis of rotation 6 in order to ensure the desired comminution effect extending crushing bars 18, which form cutting edges 18a, and in addition to the crushing bars, the fixed jaw is equipped with chisel-like crushing bodies 19, wherein the crushing bodies 19 can sit on and / or between the crushing bars 18. There are crushing bars 18 of different heights and the crushing bodies 19 protrude beyond the cutting edges 18a of the crushing bars. The crushing bars 18 may also have saw-like notches 20 and, depending on the structural conditions of the machine housing 2, it is possible to pull the crushing bars 18 upward beyond the area equipped with the crushing body and towards the insertion opening 4 (FIGS. 2 and 4).

Im Betrieb des Rotationsbackenbrechers 1 wird das Aufgabematerial durch die Einwurföffnung 3 eingeworfen und gelangt auf den Rotor 5, der es mit seinen Umlaufbacken 7 mitnimmt und es gegen die Festbacke 10 bewegt. Hier wird das Aufgabematerial gegen die Schneiden 18a der Brechleisten 18 und die Brechkörper 19 gedrückt, wobei die flache Neigung der Festbacke 10 und der sich verengende Spalt zwischen Rotor 5 und Festbacke 10 einen immer stärker werdenden Einzug mit sich bringen, so daß die auf das Material übertragenen Druckspannungen so lange ansteigen, bis das Material bricht. Durch das Anpressen des Materials an die Brechleisten 18 und die Brechkörper 19 kann es nicht im Brechraum des Gehäuses frei herumfliegen oder dem Einwirken der Brechwerkzeuge ausweichen und wird rasch und wirkungsvoll zerkleinert. Dieses Fixierverhalten und damit auch der Brecheffekt wird durch vordere Brechkanten 19a der Brechkörper 19 verbessert, deren Verlauf im wesentlichen um einen Winkel von mehr als 30 ° zur Horizontalen geneigt ist. Außerdem ist es dabei günstig, wenn eine geradlinige Verlängerung A der Brechkante 19a der obersten Brechkörper 19 den Rotorumlaufkreis, wenn überhaupt, dann in einem Bogenbereich schneidet, der sich nicht weiter als 20 ° vom Scheitelpunkt weg in Rotordrehrichtung erstreckt, um bereits im Einwurfbereich das aufgegebene Material richtig erfassen zu können. Das genügend zerkleinerte Material gelangt dann von der Festbacke 10 in Rotordrehrichtung zur Mahlplatte 14 und fließt von dort zur Mahlbahn 16, wobei gegebenenfalls eine Nachzerkleinerung erfolgt, und verläßt das Maschinengehäuse 2 durch die Auswurföffnung 4.During operation of the rotary jaw crusher 1, the feed material is thrown in through the insertion opening 3 and reaches the rotor 5, which takes it along with its rotating jaws 7 and moves it against the fixed jaw 10. Here, the feed material is pressed against the cutting edges 18a of the crushing bars 18 and the crushing bodies 19, the flat inclination of the fixed jaw 10 and the narrowing gap between the rotor 5 and the fixed jaw 10 bringing an ever increasing indentation with it, so that the material transferred compressive stresses until the material breaks. By pressing the material onto the crushing bars 18 and the crushing bodies 19, it cannot fly around freely in the crushing chamber of the housing or evade the action of the crushing tools and is shredded quickly and effectively. This fixing behavior and thus also the breaking effect is improved by front breaking edges 19a of the breaking body 19, the course of which is inclined essentially by an angle of more than 30 ° to the horizontal. In addition, it is advantageous if a straight-line extension A of the breaking edge 19a of the uppermost breaking body 19 intersects the rotor circuit, if at all, in an arc region which does not extend more than 20 ° from the apex extends in the direction of rotation of the rotor in order to be able to correctly grasp the material already in the throw-in area. The material which has been comminuted sufficiently then passes from the fixed jaw 10 in the direction of rotation of the rotor to the grinding plate 14 and flows from there to the grinding path 16, where appropriate comminution takes place, and leaves the machine housing 2 through the ejection opening 4.

Claims (9)

Rotationsbackenbrecher (1), mit einem innerhalb eines Gehäuses (2) um eine horizontale Drehachse (6) umlaufenden, wenigstens eine Umlaufbacke (7) aufnehmenden Rotor (5) und einer gehäusefesten, im wesentlichen oberhalb des absteigenden Bereichs des Rotorumlaufkreises angeordneten Festbacke (10), die sich in einer gegenüber der Horizontalen flach ansteigenden Neigung entgegen der Rotordrehrichtung zur Einwurföffnung (3) des Gehäuses (2) hin erstreckt und rotorseitig vorstehende Brechleisten (18) od. dgl. besitzt, dadurch gekennzeichnet, daß die Festbacke (10) etwa normal zur Rotordrehachse (6) verlaufende Brechleisten (18) aufweist, die mit Schneiden (18a) versehen sind.Rotary jaw crusher (1), with a rotor (5) rotating within a housing (2) about a horizontal axis of rotation (6) and receiving at least one rotating jaw (7), and a fixed jaw (10) arranged substantially above the descending area of the rotating rotor circuit which extends in a slope that rises gently against the horizontal in the opposite direction of rotation of the rotor to the insertion opening (3) of the housing (2) and has crushing bars (18) or the like protruding on the rotor side, characterized in that the fixed jaw (10) is approximately normal has crushing bars (18) running to the rotor axis of rotation (6), which are provided with cutting edges (18a). Rotationsbackenbrecher nach Anspruch 1, dadurch gekennzeichnet, daß die Festbacke (10) zusätzlich zu den schneidenbildenden Brechleisten (18) mit meißelartigen Brechkörpern (19) bestückt ist, die zwischen und/oder auf den Brechleisten (18) sitzen.Rotary jaw crusher according to claim 1, characterized in that the fixed jaw (10) is equipped in addition to the cutting-forming crushing bars (18) with chisel-like crushing bodies (19) which sit between and / or on the crushing bars (18). Rotationsbackenbrecher nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß unterschiedlich hohe und/oder lange Brechleisten (18) vorgesehen sind.Rotary jaw crusher according to claim 1 or 2, characterized in that crushing bars (18) of different heights and / or lengths are provided. Rotationsbackenbrecher nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Brechkörper (19) die Schneiden (18a) der Brechleisten (18) überragen.Rotary jaw crusher according to claim 2 or 3, characterized in that the crushing bodies (19) protrude beyond the cutting edges (18a) of the crushing bars (18). Rotationsbackenbrecher nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß sich die Brechleisten (18) über den brechkörperbestückten Bereich der Festbacke (10) hinaus zur Einwurföffnung (3) hin erstrecken.Rotary jaw crusher according to one of claims 2 to 4, characterized in that the crushing bars (18) extend beyond the area of the fixed jaw (10) which is equipped with crushing bodies and towards the insertion opening (3). Rotationsbackenbrecher nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß den Brechkörpern (19) der Festbacke (10) radiale Schneidkörper (8) der Umlaufbacken (7) zugeordnet sind.Rotary jaw crusher according to one of claims 2 to 5, characterized in that the crushing bodies (19) of the fixed jaw (10) are assigned radial cutting bodies (8) of the rotating jaws (7). Rotationsbackenbrecher nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Schneiden (18a) der Brechleisten (18) sägeartige Einkerbungen (20) aufweisen.Rotary jaw crusher according to one of claims 1 to 6, characterized in that the cutting edges (18a) of the crushing bars (18) have saw-like notches (20). Rotationsbackenbrecher nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß die Brechkörper (19) der Einwurföffnung (3) zugewandte vordere Brechkanten (19a) bilden, die im wesentlichen einen zur Horizontalen um einen Winkel (α) von mehr als 30 °, vorzugsweise um einen Winkel von 40 ° bis 80 °, geneigten Verlauf besitzen.Rotary jaw crusher according to one of Claims 2 to 7, characterized in that the crushing bodies (19) form front breaking edges (19a) which face the insertion opening (3) and which essentially have an angle (α) of more than 30 °, preferably to the horizontal have an inclined course at an angle of 40 ° to 80 °. Rotationsbackenbrecher nach Anspruch 8, dadurch gekennzeichnet, daß eine geradlinige Verlängerung der Brechkante (19a) des obersten Brechkörpers (19) gegebenenfalls den Rotorumlaufkreis in einem Bogenbereich schneidet, der sich vom Scheitelpunkt des Umlaufkreises 20 ° in und 90 ° gegen die Rotordrehrichtung erstreckt.Rotary jaw crusher according to claim 8, characterized in that a rectilinear extension of the breaking edge (19a) of the uppermost crushing body (19) optionally intersects the rotor circuit in an arc region which extends 20 ° in and 90 ° from the apex of the circuit to the direction of rotation of the rotor.
EP92890002A 1991-01-21 1992-01-08 Rotational jaw crusher Withdrawn EP0496721A1 (en)

Applications Claiming Priority (2)

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AT121/91 1991-01-21
AT0012191A AT397045B (en) 1991-01-21 1991-01-21 ROTARY JAW CRUSHERS

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US (1) US5490636A (en)
EP (1) EP0496721A1 (en)
AT (1) AT397045B (en)
AU (1) AU642572B2 (en)
CZ (1) CZ279321B6 (en)
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ZA (1) ZA92381B (en)

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Also Published As

Publication number Publication date
AU642572B2 (en) 1993-10-21
AT397045B (en) 1994-01-25
CS17392A3 (en) 1992-08-12
ZA92381B (en) 1992-10-28
US5490636A (en) 1996-02-13
ATA12191A (en) 1993-06-15
AU1031092A (en) 1992-07-23
SK278639B6 (en) 1997-12-10
CZ279321B6 (en) 1995-04-12

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