EP1192998A1 - Beater bar capable of being acted upon one side for impactor rotors - Google Patents

Beater bar capable of being acted upon one side for impactor rotors Download PDF

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Publication number
EP1192998A1
EP1192998A1 EP01123194A EP01123194A EP1192998A1 EP 1192998 A1 EP1192998 A1 EP 1192998A1 EP 01123194 A EP01123194 A EP 01123194A EP 01123194 A EP01123194 A EP 01123194A EP 1192998 A1 EP1192998 A1 EP 1192998A1
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EP
European Patent Office
Prior art keywords
rotors
blow bar
arc
blow
undercut
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Granted
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EP01123194A
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German (de)
French (fr)
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EP1192998B1 (en
Inventor
Volker Heukamp
Gerhard Hemesath
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Hazemag and EPR GmbH
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Hazemag and EPR GmbH
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Publication of EP1192998A1 publication Critical patent/EP1192998A1/en
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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
    • 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 one-way impact bar for Impact mill rotors, which can be inserted in the circumferential slots of the rotors in a form-fitting manner backwards - against the direction of rotation of the rotors - and facing them, one Has an offset of its elongated cross-section with which it extends into a longitudinal Undercut of the circumferential slots engages and against the centrifugal force of the rotating rotors is held, with contact surfaces with which the blow bar against a System of the rotors is held and with a support surface over which the blow bar by means of a support or contact piece with the undercut in the Circumferential slots is engaged.
  • blow bar is known from US Pat. No. 3,151,816. It has a right-angled offset on its back, which undercuts an undercut in the contact surface of the circumferential slots in the rotor.
  • the narrow side of the blow bar facing the rotor is bevelled and a wedge presses against this bevel, which is adjustably supported by means of pressure screws against the front face of the peripheral slots facing the blow bar.
  • Interchangeable press plates are provided between the pressure screws and the front surface of the circumferential slots and the wedge is additionally guided through lateral abutments.
  • blow bar is also unsafe, in which, with insufficient maintenance or observation, the wedges in the rotating rotor with their pressure screws and other aids can come loose, which carries the risk that the blow bar will fly out of its holder and cause major damage to the Impact mill caused.
  • a sharp-edged undercut of the circumferential slots and the corresponding sharp-edged offset of the blow bar require precise machining of the corresponding edges and surfaces, but is also undesirable because of the notch effects that may occur here.
  • Blow bars that can be acted upon on one side are widely known, including those that have offsets or similar means for fastening. They are usually attached to the rotor body by means of wedges or wedge-shaped aids and additionally with screw connections (US Pat. No.
  • blow bars that can be acted on on one side are small Wear potential uneconomical. Therefore blow bars have been used for a long time used, which are rotatable about their longitudinal axis and / or transverse axis and loose in Circumferential slots of the rotors are used (DE-GM 1 831 058, DE 37 42 395 C1). Because of the necessary room for maneuver in the form of gaps, this also results in this blow bars a sealing of the column by fine material, apart from that turning or turning the blow bars is time-consuming and therefore expensive. That too is Utilization rate of these known blow bars because of their relatively large Clamping height only low. Increasingly, however, are because of expensive wages the maintenance costs are decisive for economy.
  • the invention therefore seeks to propose a blow bar that is easy in the Impact mill rotors can be installed and removed and is also handy in relation to their total mass has a high wear mass and the others above avoids disadvantages mentioned.
  • blow bar that can be loaded on one side with an anchoring serving to fix it in that the angled portion arcuate and the pivot point of the smaller radius of the arc to the Contact surfaces at a considerable distance from the fulcrum of the larger radius of the bow on the front / lower support surface in the direction of the impact circle Blow bar is arranged and the two pivot points in a line approximately parallel to Striking surface run, with the contact surfaces in the extension of the smaller bow stand at an obtuse angle to each other.
  • the contoured circumferential slots of the Impact mill rotors can be used, is therefore easily replaceable, because on the one hand in installed condition no slots or clearances between their contact surfaces or their support surface and the surfaces corresponding to them Circumferential slots are present, and on the other hand, because the blow bar due to Arrangement of the pivot points of the arc radii to each other when tilting forward as soon as she releases her self-clamping opening a crack. Also through the Arrangement of the fulcrums of the radii or the two boundary curves of the Bending the blow bar results in a low clamping height of the blow bar in that the larger outer arch, the lower and front support surface limited, is provided further towards the rotor. It is advantageous if the Distance of the pivot points of the radii to the remaining height of the blow bar Ratio of 1: 7 to 1:15, preferably 1:10.
  • the invention also proposes that the obtuse angle between those in extension of the smaller arch lying contact surfaces is 120 °.
  • the offset facing the rotor is on their end face with a extending over the length of the blow bar provided segment-shaped groove.
  • a profile rod preferably made of plastic and round in Cross section to use the tilt angle of the built-in blow bar during operation to limit forward.
  • 1 is the section of a jacket of an impact mill rotor referred to, the circumferential slots 2 running parallel to the rotor shaft, not shown having.
  • each circumferential slot is a blow bar 3 from the side inserted, the blow bar in cross section an elongated, about the same thickness Has profile.
  • the blow bar is at its end in the circumferential slot with an arcuate bend 4 with which they provide an undercut 5 of the Reaches under circumferential slot.
  • the undercut is kept in engagement Blow bar 3 by a support or abutment piece 6, which is interchangeable basically Circumferential slot is arranged.
  • the blow bar is supported with her Contact surface 7 against an approximately radially aligned contact surface of the Circumferential slot, which causes the energy of the rotating rotor in the blow bar is directed.
  • the front and back of the blow bar have different arches Expansion on, the fulcrums of the radii of the arches in a given Relationship to each other are arranged.
  • the pivot point is 8 the smaller one Radius R1 of the inner arc provided on the back of the blow bar in a distance X from the pivot point 9 of the larger radius R2 of the outer, at the Front of the blow bar provided arc in the direction of the impact circle 10 arranged, the distance X to the remaining blow bar height Y expediently has a ratio of 1:10, which can differ, however by blow bar size.
  • the two pivot points 8 and 9 are in a line L arranged, which runs approximately parallel to the face 11.
  • the contact surface 7 of the Blow bar 3 merges into the smaller sheet, the one at the end of the discharge Short surface provided with the arc is designated 7 '.
  • These areas are in one Angles of approx. 120 ° to each other.
  • the outer arc of the offset 4 serves as a support surface 12 with which the built-in blow bar against the support or abutment 6 basically the Circumferential slot 2 supports.
  • the built-in blow bar 3 does not unintentionally tipping and rattling, relieved by the resulting gaps, has the blow bar on its end face of the crank 4 facing the rotor a segment-shaped groove 13 extending over the length of the blow bar on, with a corresponding groove 14 in the approximately radial itself extending and longitudinally aligned over the rotor width boundary surface 15 of the Circumferential slots 2 of the rotor correspond. Between these gutters, the give a circular cross-section together, is a round profile bar 16th can be introduced, which is advantageously made of plastic.
  • blow bar according to the invention clamped in the rotor relatively short, which means a large wear mass Available.
  • the blow bar is therefore extremely economical.

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

Abstract

A beater bar capable of being acted upon on one side for impactor rotors and insertable form-fittedly into circumferential slots of the rotors has a bend with an elongate cross-section, a bearing surface heldable counter to a centrifugal force of the rotating rotors against a bearing surface of the rotors, a supporting surface engageable with an undercut in the circumferential slot; a piece which holds the beater bar in engagement with the undercut in an circumferential slot, the bend being arcuate, and a center of rotation of a smaller radius of an arc of the bearing surfaces being at a considerable distance from a center of rotation of a larger radius of an arc of the supporting surface, so that the two centers of rotation run in a line extending approximately parallel to a beating surface, the bearing surfaces being at an obtuse angle to one another in a prolongation of the smaller arc.

Description

Die Erfindung betrifft eine einseitig beaufschlagbare Schlagleiste für Prallmühlenrotoren, die in Umfangschlitze der Rotore formschlüssig einsetzbar ist, die nach hinten - entgegen der Umlaufrichtung der Rotore - und diesen zugewandt, eine Abkröpfung ihres länglichen Querschnitts aufweist, mit der sie in eine längsverlaufende Hinterschneidung der Umfangsschlitze eingreift und entgegen der Fliehkraft der drehenden Rotore gehalten ist, mit Anlageflächen, mit der die Schlagleiste gegen eine Anlage der Rotore gehalten ist und mit einer Abstützfläche, über die die Schlagleiste mittels einem Stütz- oder Anlagestück mit der Hinterschneidung in den Umfangsschlitzen in Eingriff steht.The invention relates to a one-way impact bar for Impact mill rotors, which can be inserted in the circumferential slots of the rotors in a form-fitting manner backwards - against the direction of rotation of the rotors - and facing them, one Has an offset of its elongated cross-section with which it extends into a longitudinal Undercut of the circumferential slots engages and against the centrifugal force of the rotating rotors is held, with contact surfaces with which the blow bar against a System of the rotors is held and with a support surface over which the blow bar by means of a support or contact piece with the undercut in the Circumferential slots is engaged.

Eine derartige Schlagleiste ist aus der US-PS 3,151,816 bekannt. Sie weist auf ihrer Rückseite eine rechtwinklige Abkröpfung auf, die eine Hinterschneidung der Anlagefläche der Umfangsschlitze im Rotor untergreift. Die dem Rotor zugewandte Schmalseite der Schlagleiste ist abgeschrägt ausgeführt und gegen diese Abschrägung drückt ein Keil, der sich verstellbar mittels Druckschrauben gegen die der Schlagleiste zugewandte vordere Fläche der Umfangsschlitze abstützt. Zwischen den Druckschrauben und der Vorderfläche der Umfangsschlitze sind auswechselbare Pressplatten vorgesehen und der Keil wird zusätzlich durch seitliche Widerlager geführt. Eine derartige Fixierung der Schlagleiste ist aufwendig und teuer, insbesondere, da die dafür erforderlichen Teile an dieser Stelle in besonderem Maße dem Verschleiß ausgesetzt sind. Die Befestigung der Schlagleiste ist auch unsicher, in dem bei nicht ausreichender Wartung bzw. Beobachtung die Keile im drehenden Rotor mit ihren Druckschrauben und den weiteren Hilfsmitteln sich lösen können, was die Gefahr birgt, daß die Schlagleiste aus ihrer Halterung herausfliegt und große Schäden an der Prallmühle verursacht. Eine scharfkantige Hinterschneidung der Umfangsschlitze und der damit korrespondierenden scharfkantigen Abkröpfung der Schlagleiste erfordern eine präzise Bearbeitung der entsprechenden Kanten und Flächen, ist aber auch wegen der hier gegebenenfalls auftretenden Kerbwirkungen unerwünscht.
Einseitig beaufschlagbare Schlagleisten sind vielfach bekannt, auch solche, die Abkröpfungen oder ähnliche Mittel zur Befestigung aufweisen. Sie werden in der Regel mittels Keile oder keilförmige Hilfsmittel und zusätzlich noch mit Schraubverbindungen am Rotorkörper befestigt (US-PS 3,874,603, DE-PS 16 07 552, AU-PS 253,653) oder sie sind in Umfangsausnehmungen von Scheibenrotoren eingeschoben (DE-27 59 250 A1). Während bei den erstgenannten Schlagleisten die Befestigung kompliziert ist und diese die weiter oben beschriebenen Nachteile aufweisen, ergibt sich bei den letztgenannten Schlagleisten zusätzlich noch das Problem, daß die Schlitze zwischen den Schlagleisten und der diese umfassenden Rotorkonturen sich mit Feinmaterial zusetzen und den nach Abnutzung der Schlagleisten erforderlichen Ausbau erschweren.Such a blow bar is known from US Pat. No. 3,151,816. It has a right-angled offset on its back, which undercuts an undercut in the contact surface of the circumferential slots in the rotor. The narrow side of the blow bar facing the rotor is bevelled and a wedge presses against this bevel, which is adjustably supported by means of pressure screws against the front face of the peripheral slots facing the blow bar. Interchangeable press plates are provided between the pressure screws and the front surface of the circumferential slots and the wedge is additionally guided through lateral abutments. Such a fixation of the blow bar is complex and expensive, especially since the parts required for this are particularly exposed to wear at this point. The attachment of the blow bar is also unsafe, in which, with insufficient maintenance or observation, the wedges in the rotating rotor with their pressure screws and other aids can come loose, which carries the risk that the blow bar will fly out of its holder and cause major damage to the Impact mill caused. A sharp-edged undercut of the circumferential slots and the corresponding sharp-edged offset of the blow bar require precise machining of the corresponding edges and surfaces, but is also undesirable because of the notch effects that may occur here.
Blow bars that can be acted upon on one side are widely known, including those that have offsets or similar means for fastening. They are usually attached to the rotor body by means of wedges or wedge-shaped aids and additionally with screw connections (US Pat. No. 3,874,603, DE-PS 16 07 552, AU-PS 253,653) or they are inserted into circumferential recesses in disc rotors (DE-27 59 250 A1). While the attachment in the first-mentioned blow bars is complicated and has the disadvantages described above, there is also the problem in the latter blow bars that the slots between the blow bars and the rotor contours comprising them clog with fine material and that after wear of the blow bars complicate necessary expansion.

An sich sind einseitig beaufschlagbare Schlagleisten wegen ihres geringen Abnutzungspotentials unwirtschaftlich. Seit langer Zeit werden daher Schlagleisten eingesetzt, die um ihre Längsachse und/oder Querachse drehbar sind und lose in Umfangsschlitze der Rotore eingesetzt werden (DE-GM 1 831 058, DE 37 42 395 C1). Wegen der hierfür erforderlichen Spielräume in Form von Spalte ergibt sich auch bei diesen Schlagleisten ein Dichtsetzen der Spalte durch Feinmaterial, abgesehen davon ist das Drehen bzw. Wenden der Schlagleisten zeitaufwendig und damit teuer. Auch ist der Ausnutzungsgrad dieser bekannten Schlagleisten wegen ihrer verhältnismäßig großen Einspannhöhe nur gering. Im zunehmenden Maße sind jedoch wegen der teuren Löhne die Wartungskosten für eine Wirtschaftlichkeit entscheidend.As such, blow bars that can be acted on on one side are small Wear potential uneconomical. Therefore blow bars have been used for a long time used, which are rotatable about their longitudinal axis and / or transverse axis and loose in Circumferential slots of the rotors are used (DE-GM 1 831 058, DE 37 42 395 C1). Because of the necessary room for maneuver in the form of gaps, this also results in this blow bars a sealing of the column by fine material, apart from that turning or turning the blow bars is time-consuming and therefore expensive. That too is Utilization rate of these known blow bars because of their relatively large Clamping height only low. Increasingly, however, are because of expensive wages the maintenance costs are decisive for economy.

Die Erfindung sucht daher eine Schlagleiste in Vorschlag zu bringen, die leicht in die Rotoren von Prallmühlen ein- und ausbaubar und auch handlich ist, die im Verhältnis zu ihrer Gesamtmasse eine hohe Verschleißmasse aufweist und die weiteren oben erwähnten Nachteile vermeidet.The invention therefore seeks to propose a blow bar that is easy in the Impact mill rotors can be installed and removed and is also handy in relation to their total mass has a high wear mass and the others above avoids disadvantages mentioned.

Gelöst wird diese Aufgabe in Bezug auf eine einseitig beaufschlagbare Schlagleiste, mit einer der Befestigung dienenden Abkröpfung dadurch, daß die Abkröpfung bogenförmig ausgebildet und der Drehpunkt des kleineren Radius des Bogens an den Anlageflächen in einem beträchtlichen Abstand vom Drehpunkt des größeren Radius des Bogens an der vorderen/unteren Abstützfläche in Richtung Schlagkreis der Schlagleiste angeordnet ist und die beiden Drehpunkte in einer Linie in etwa parallel zur Schlagfläche verlaufen, wobei die Anlageflächen in Verlängerung des kleineren Bogens in einem stumpfen Winkel zueinander stehen.This task is solved with regard to a blow bar that can be loaded on one side with an anchoring serving to fix it in that the angled portion arcuate and the pivot point of the smaller radius of the arc to the Contact surfaces at a considerable distance from the fulcrum of the larger radius of the bow on the front / lower support surface in the direction of the impact circle Blow bar is arranged and the two pivot points in a line approximately parallel to Striking surface run, with the contact surfaces in the extension of the smaller bow stand at an obtuse angle to each other.

Die erfindungsgemäße Schlagleiste, die in ihrer Kontur angepaßte Umfangsschlitze der Prallmühlenrotore einsetzbar ist, ist deshalb leicht auswechselbar, weil einerseits in eingebautem Zustand keine Schlitze oder Spielräume zwischen ihren Anlageflächen bzw. ihrer Abstützfläche und den mit diesen korrespondierenden Flächen der Umfangsschlitze vorhanden sind, und andererseits, weil die Schlagleiste infolge der Anordnung der Drehpunkte der Bogenradien zueinander beim Nach-vorne-kippen alsbald von ihrer Selbstklemmung einen Spalt öffnend freikommt. Ebenfalls durch die Anordnung der Drehpunkte der Radien bzw. der beiden Begrenzungsbögen der Abkröpfung der Schlagleiste ergibt sich eine geringe Einspannhöhe der Schlagleiste dadurch, daß der größere äußere Bogen, der die untere und vordere Abstützfläche begrenzt, weiter innen zum Rotor hin vorgesehen ist. Vorteilhaft ist es, wenn der Abstand der Drehpunkte der Radien zur verbleibenden Höhe der Schlagleiste ein Verhältnis von 1 : 7 bis 1 : 15, vorzugsweise 1 : 10 aufweist.The blow bar according to the invention, the contoured circumferential slots of the Impact mill rotors can be used, is therefore easily replaceable, because on the one hand in installed condition no slots or clearances between their contact surfaces or their support surface and the surfaces corresponding to them Circumferential slots are present, and on the other hand, because the blow bar due to Arrangement of the pivot points of the arc radii to each other when tilting forward as soon as she releases her self-clamping opening a crack. Also through the Arrangement of the fulcrums of the radii or the two boundary curves of the Bending the blow bar results in a low clamping height of the blow bar in that the larger outer arch, the lower and front support surface limited, is provided further towards the rotor. It is advantageous if the Distance of the pivot points of the radii to the remaining height of the blow bar Ratio of 1: 7 to 1:15, preferably 1:10.

Die Erfindung schlägt auch vor, daß der stumpfe Winkel zwischen den in Verlängerung des kleineren Bogens liegenden Anlageflächen 120° beträgt.The invention also proposes that the obtuse angle between those in extension of the smaller arch lying contact surfaces is 120 °.

In weiterer Ausgestaltung der Erfindung ist die dem Rotor zugewandte Abkröpfung an ihrer Stirnfläche mit einer über die Länge der Schlagleiste sich erstreckende segmentförmige Auskehlung versehen. Zwischen diese Auskehlung und eine entsprechende Auskehlung in den Umfangsschlitzen der Rotore ist es gegebenenfalls zweckmäßig, einen Profilstab, vorzugsweise aus Kunststoff bestehend und rund im Querschnitt einzusetzen, um so den Kippwinkel der eingebauten Schlagleiste im Betrieb nach vorne zu begrenzen.In a further embodiment of the invention, the offset facing the rotor is on their end face with a extending over the length of the blow bar provided segment-shaped groove. Between this groove and one it may be appropriate groove in the circumferential slots of the rotors expedient, a profile rod, preferably made of plastic and round in Cross section to use the tilt angle of the built-in blow bar during operation to limit forward.

In der Zeichnung ist ein Beispiel der erfindungsgemäßen Schlagleiste dargestellt, und zwar zeigt

Fig. 1
einen Rotorabschnitt mit eingebauter Schlagleiste im Querschnitt und
Fig. 2
den gleichen Rotorabschnitt mit einer zum Zwecke des Ein- oder Ausbaus nach vorne gekippten Schlagleiste.
In the drawing, an example of the blow bar according to the invention is shown, namely shows
Fig. 1
a rotor section with built-in blow bar in cross section and
Fig. 2
the same rotor section with a blow bar tilted forward for the purpose of installation or removal.

In den Figuren ist mit 1 der Ausschnitt eines Mantels eines Prallmühlenrotors bezeichnet, der zur nicht gezeigten Rotorwelle parallel verlaufende Umfangsschlitze 2 aufweist. In jeden Umfangsschlitz ist eine Schlagleiste 3 von der Seite her eingeschoben, wobei die Schlagleiste im Querschnitt ein längliches, etwa gleich dickes Profil aufweist. Die Schlagleiste ist an ihrem im Umfangsschlitz sitzenden Ende mit einer bogenförmigen Abkröpfung 4 versehen, mit der sie eine Hinterschneidung 5 des Umfangsschlitzes untergreift. Mit der Hinterschneidung in Eingriff gehalten wird die Schlagleiste 3 durch ein Stütz- oder Anlagestück 6, das auswechselbar im Grunde des Umfangsschlitzes angeordnet ist. Dabei stützt sich die Schlagleiste mit ihrer Anlagefläche 7 gegen eine in etwa radial ausgerichtete Anlagefläche des Umfangsschlitzes ab, wodurch die Energie des drehenden Rotors in die Schlagleiste geleitet wird.In the figures, 1 is the section of a jacket of an impact mill rotor referred to, the circumferential slots 2 running parallel to the rotor shaft, not shown having. In each circumferential slot is a blow bar 3 from the side inserted, the blow bar in cross section an elongated, about the same thickness Has profile. The blow bar is at its end in the circumferential slot with an arcuate bend 4 with which they provide an undercut 5 of the Reaches under circumferential slot. The undercut is kept in engagement Blow bar 3 by a support or abutment piece 6, which is interchangeable basically Circumferential slot is arranged. The blow bar is supported with her Contact surface 7 against an approximately radially aligned contact surface of the Circumferential slot, which causes the energy of the rotating rotor in the blow bar is directed.

Bedingt durch die bogenförmige Abkröpfung 4 des Querschnitts und die Dicke der Schlagleiste weisen die Vorder- und Rückseite der Schlagleiste Bögen unterschiedlicher Ausdehnung auf, wobei die Drehpunkte der Radien der Bögen in einem bestimmten Verhältnis zueinander angeordnet sind. Und zwar ist der Drehpunkt 8 des kleineren Radius R1 des inneren, an der Rückseite der Schlagleiste vorgesehenen Bogens in einem Abstand X vom Drehpunkt 9 des größeren Radius R2 des äußeren, an der Vorderseite der Schlagleiste vorgesehenen Bogens in Richtung des Schlagkreises 10 angeordnet, wobei der Abstand X zur verbleibenden Schlagleistenhöhe Y zweckmäßigerweise ein Verhältnis von 1:10 aufweist, was aber differieren kann, je nach Schlagleistengröße. Außerdem sind die beiden Drehpunkte 8 und 9 in einer Linie L angeordnet, die in etwa parallel zur Schlagfläche 11 verläuft. Die Anlagefläche 7 der Schlagleiste 3 geht in den kleineren Bogen über, wobei die am Auslaufende dieses Bogens vorgesehene kurze Fläche mit 7' bezeichnet ist. Diese Flächen stehen in einem Winkel von ca. 120° zueinander. Due to the arcuate bend 4 of the cross section and the thickness of the Blow bar, the front and back of the blow bar have different arches Expansion on, the fulcrums of the radii of the arches in a given Relationship to each other are arranged. The pivot point is 8 the smaller one Radius R1 of the inner arc provided on the back of the blow bar in a distance X from the pivot point 9 of the larger radius R2 of the outer, at the Front of the blow bar provided arc in the direction of the impact circle 10 arranged, the distance X to the remaining blow bar height Y expediently has a ratio of 1:10, which can differ, however by blow bar size. In addition, the two pivot points 8 and 9 are in a line L arranged, which runs approximately parallel to the face 11. The contact surface 7 of the Blow bar 3 merges into the smaller sheet, the one at the end of the discharge Short surface provided with the arc is designated 7 '. These areas are in one Angles of approx. 120 ° to each other.

Der äußere Bogen der Abkröpfung 4 dient als Abstützfläche 12, mit der sich die eingebaute Schlagleiste gegen das Stütz- oder Anlagestück 6 im Grunde des Umfangsschlitzes 2 abstützt.The outer arc of the offset 4 serves as a support surface 12 with which the built-in blow bar against the support or abutment 6 basically the Circumferential slot 2 supports.

Durch diese Ausbildung der Schlagleiste und die der an diese angepaßten Schlagleistenhalterung im Rotor wird erreicht, daß die Schlagleiste sich in der Arbeitsstellung selbst mit ihrer bogenförmigen Abstützfläche 12 zwischen der entsprechenden Fläche des Stütz- oder Anlagestückes 6 und der bogenförmig ausgebildeten Hinterschneidung 5 festklemmt und damit völlig gegen ein Herausfliegen aus dem sich drehenden Rotor gesichert ist. Andererseits wird hierdurch auch erreicht, daß zwischen den Anlageflächen 7, 7' und den Flächen der Hinterschneidung 5 sowie der Abstützfläche 12 der Schlagleiste 3 und den damit korrespondierenden Flächen in den Umfangsschlitzen 2 in Arbeitsstellung der Schlagleiste keine Spalte vorhanden sind, in denen sich Feinmaterial ablagern kann. Der Ausbau der Schlagleiste gestaltet sich sehr einfach. Diese braucht nur etwas nach vorne gekippt zu werden, wodurch sich infolge der Anordnung der Drehpunkte 8/9 die Klemmung der Schlagleiste löst und Spalte zwischen den Berührungsflächen entstehen, so daß die Schlagleiste leicht seitlich herausgezogen werden kann.Through this training of the blow bar and that of the adapted Blow bar holder in the rotor is achieved that the blow bar in the Working position itself with its arcuate support surface 12 between the corresponding surface of the support or contact piece 6 and the arcuate trained undercut 5 clamps and thus completely against flying out is secured from the rotating rotor. On the other hand, it also achieves that between the contact surfaces 7, 7 'and the surfaces of the undercut 5 and the support surface 12 of the blow bar 3 and the corresponding surfaces in there are no gaps in the circumferential slots 2 in the working position of the blow bar are where fine material can accumulate. The expansion of the blow bar designed yourself very easy. This only needs to be tilted forward a little, which makes due to the arrangement of the pivot points 8/9 the clamping of the blow bar releases and Gaps arise between the contact surfaces, so that the blow bar slightly to the side can be pulled out.

Damit beim Anlauf oder Auslauf des Rotors 1 die eingebaute Schlagleiste 3 nicht ungewollt herabkippt und klappert, erleichtert durch die dabei entstehenden Spalte, weist die Schlagleiste an ihrer dem Rotor zugewandten Stirnfläche der Abkröpfung 4 eine über die Länge der Schlagleiste sich erstreckende segmentförmige Auskehlung 13 auf, die mit einer entsprechenden Auskehlung 14 in der in etwa radial sich erstreckenden und längs über die Rotorbreite ausgerichteten Begrenzungsfläche 15 der Umfangsschlitze 2 des Rotors korrespondiert. Zwischen diese Auskehlungen, die zusammen einen kreisförmigen Querschnitt abgeben, ist ein runder Profilstab 16 einbringbar, der zweckmäßigerweise aus Kunststoff hergestellt ist.So that when the rotor 1 starts or stops, the built-in blow bar 3 does not unintentionally tipping and rattling, relieved by the resulting gaps, has the blow bar on its end face of the crank 4 facing the rotor a segment-shaped groove 13 extending over the length of the blow bar on, with a corresponding groove 14 in the approximately radial itself extending and longitudinally aligned over the rotor width boundary surface 15 of the Circumferential slots 2 of the rotor correspond. Between these gutters, the give a circular cross-section together, is a round profile bar 16th can be introduced, which is advantageously made of plastic.

Wie die Figuren der Zeichnung deutlich machen, ist die erfindungsgemäße Schlagleiste im Rotor verhältnismäßig kurz eingespannt, wodurch eine große Verschleißmasse zur Verfügung steht. Die Schlagleiste weist somit eine hohe Wirtschaftlichkeit auf.As the figures of the drawing make clear, the blow bar according to the invention clamped in the rotor relatively short, which means a large wear mass Available. The blow bar is therefore extremely economical.

Claims (4)

Einseitig beaufschlagbare Schlagleiste für Prallmühlenrotoren, die in Umfangschlitze der Rotore formschlüssig einsetzbar ist, die nach hinten - entgegen der Umlaufrichtung der Rotore - und diesen zugewandt eine Abkröpfung ihres länglichen Querschnitts aufweist, mit der sie in eine längsverlaufende Hinterschneidung der Umfangsschlitze eingreift und entgegen der Fliehkraft der drehenden Rotore gehalten ist, mit einer Anlagefläche, mit der die Schlagleiste gegen eine Anlage der Rotore gehalten ist und mit einer Abstützfläche, über die die Schlagleiste mittels einem Stütz- oder Anlagestück mit der Hinterschneidung im Umfangsschlitz in Eingriff steht, dadurch gekennzeichnet, daß die Abkröpfüng (4) bogenförmig ausgebildet und der Drehpunkt (8) des kleineren Radius (R1) des Bogens an den Anlageflächen (7/7') in einem beträchtlichen Abstand (Maß X) vom Drehpunkt (9) des größeren Rardius (R2) des Bogens an der Abstützfläche (12) in Richtung Schlagkreis (10) der Schlagleiste (3) angeordnet ist und die beiden Drehpunkte in einer Linie (L) in etwa parallel zur Schlagfläche (11) verlaufen, wobei die Anlageflächen (7/7') in Verlängerung des kleineren Bogens in einem stumpfen Winkel (α) zueinander stehen.One-sided impact bar for impact mill rotors, which can be positively inserted into the circumferential slots of the rotors, which has an offset to the rear - against the direction of rotation of the rotors - and has an oblique cross-section with which it engages in a longitudinal undercut of the circumferential slots and against the centrifugal force of the Rotating rotors is held, with a contact surface with which the blow bar is held against an abutment of the rotors and with a support surface via which the blow bar engages with the undercut in the circumferential slot by means of a support or contact piece, characterized in that the cranking (4) arcuate and the fulcrum (8) of the smaller radius (R1) of the arc at the contact surfaces (7/7 ') at a considerable distance (dimension X) from the fulcrum (9) of the larger rardius (R2) of the arc the support surface (12) in the direction of the impact circle (10) of the impact track te (3) is arranged and the two pivot points in a line (L) run approximately parallel to the striking surface (11), the contact surfaces (7/7 ') being at an obtuse angle (α) to each other in the extension of the smaller arc. Schlagleiste nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand (X) der Drehpunkte (8/9) der Radien (R1/R2) zur verbleibenden Höhe (Y) der Schlagleiste ein Verhältnis von 1 : 7 bis 1 : 15, vorzugsweise 1 : 10 aufweistBlow bar according to claim 1, characterized in that the distance (X) of the pivot points (8/9) of the radii (R1 / R2) to the remaining height (Y) of the blow bar has a ratio of 1: 7 to 1:15, preferably 1: 10 has Schlagleiste nach Anspruch 1, dadurch gekennzeichnet, daß der stumpfe Winkel (α) zwischen den in Verlängerung des kleineren Bogens liegenden Anlageflächen (7/7') 120° beträgt.Blow bar according to claim 1, characterized in that the obtuse angle (α) between the contact surfaces (7/7 ') lying in the extension of the smaller arc is 120 °. Schlagleiste nach Anspruch 1, dadurch gekennzeichnet, daß die dem Rotor (1)zugewandte Abkröpfung (4) an ihrer Stirnfläche eine über die Länge der Schlagleiste sich erstreckende segmentförmige Auskehlung (13) aufweist.Blow bar according to claim 1, characterized in that the offset (4) facing the rotor (1) has on its end face a segment-shaped groove (13) which extends over the length of the blow bar.
EP01123194A 2000-09-30 2001-09-28 Beater bar capable of being acted upon one side for impactor rotors Expired - Lifetime EP1192998B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10048699 2000-09-30
DE10048699A DE10048699C1 (en) 2000-09-30 2000-09-30 Beater arm, for impact pulverizer rotor, has curved offset with rotational point of smaller radius of curve of contact faces located a distance away from rotational point of larger radius of curve of support face

Publications (2)

Publication Number Publication Date
EP1192998A1 true EP1192998A1 (en) 2002-04-03
EP1192998B1 EP1192998B1 (en) 2004-12-01

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EP01123194A Expired - Lifetime EP1192998B1 (en) 2000-09-30 2001-09-28 Beater bar capable of being acted upon one side for impactor rotors

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US (1) US6874716B2 (en)
EP (1) EP1192998B1 (en)
AT (1) ATE283729T1 (en)
AU (1) AU775908B2 (en)
CA (1) CA2356807A1 (en)
DE (2) DE10048699C1 (en)
MX (1) MXPA01009354A (en)

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DE102007042839A1 (en) 2007-09-10 2009-03-12 Bühler AG Striking tool e.g. flat beater, for impact mill for grinding of e.g. grain, has working area provided opposite to accommodating area, where hardness characteristic of working area is variable and rotor and tool are surrounded by filter

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US7076051B2 (en) * 2001-12-12 2006-07-11 International Business Machines Corporation Promoting caller voice browsing in a hold queue
FR2952836B1 (en) * 2009-11-20 2013-06-28 Metso Minerals France S A PERCUSSION MILL.
AR100224A1 (en) 2014-04-30 2016-09-21 Esco Corp HAMMER FOR MATERIAL REDUCING MACHINES

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US3151816A (en) 1962-06-18 1964-10-06 Pettibone Mulliken Corp Crusher apparatus and method of manufacture
DE1607552A1 (en) 1965-07-09 1970-03-19 A M Byers Co Impact crusher
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GB2020572A (en) * 1978-05-02 1979-11-21 Voest Alpine Ag Impact pulverizer beater bars
GB1558925A (en) * 1976-02-14 1980-01-09 Hazemag Andreas Kg Beater bar for impact crusher rotors
DE3742395C1 (en) 1987-12-15 1989-06-15 Deutscher Sbm Vertrieb Franz W Rotor for an impact mill

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DE1831058U (en) 1961-03-07 1961-05-10 Hazemag Hartzerkleinerung Und CONVEYOR FOR HIGH SPEED IMPACT MILLS.
US3151816A (en) 1962-06-18 1964-10-06 Pettibone Mulliken Corp Crusher apparatus and method of manufacture
DE1607552A1 (en) 1965-07-09 1970-03-19 A M Byers Co Impact crusher
US3874603A (en) 1974-01-16 1975-04-01 Allis Chalmers Hammer locking arrangement for impact crusher rotor
GB1558925A (en) * 1976-02-14 1980-01-09 Hazemag Andreas Kg Beater bar for impact crusher rotors
DE2759250A1 (en) 1977-12-31 1979-07-12 Matsuzaka Co Impact crusher rotor - has impact element in rotor shoe enveloping projecting part on side adjacent rotor
GB2020572A (en) * 1978-05-02 1979-11-21 Voest Alpine Ag Impact pulverizer beater bars
DE3742395C1 (en) 1987-12-15 1989-06-15 Deutscher Sbm Vertrieb Franz W Rotor for an impact mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007042839A1 (en) 2007-09-10 2009-03-12 Bühler AG Striking tool e.g. flat beater, for impact mill for grinding of e.g. grain, has working area provided opposite to accommodating area, where hardness characteristic of working area is variable and rotor and tool are surrounded by filter

Also Published As

Publication number Publication date
MXPA01009354A (en) 2003-05-19
DE50104670D1 (en) 2005-01-05
DE10048699C1 (en) 2002-01-31
EP1192998B1 (en) 2004-12-01
US20020053615A1 (en) 2002-05-09
CA2356807A1 (en) 2002-03-30
AU775908B2 (en) 2004-08-19
US6874716B2 (en) 2005-04-05
AU7612901A (en) 2002-04-11
ATE283729T1 (en) 2004-12-15

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