EP0945181B1 - Blow bar for impact mill rotors and rotor for impact mills - Google Patents
Blow bar for impact mill rotors and rotor for impact mills Download PDFInfo
- Publication number
- EP0945181B1 EP0945181B1 EP99104665A EP99104665A EP0945181B1 EP 0945181 B1 EP0945181 B1 EP 0945181B1 EP 99104665 A EP99104665 A EP 99104665A EP 99104665 A EP99104665 A EP 99104665A EP 0945181 B1 EP0945181 B1 EP 0945181B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- blow bar
- blow
- bar
- axis
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
- B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor
Definitions
- the invention relates to a blow bar for impact mill rotors for the purpose of reversibility mirror-symmetrical, elongated cross-section, which on the rear side in the direction of rotation of the rotor has surfaces with which they to the rear and radially from the inside against fixed parts provided on the rotor and on the front side contact surfaces for movable holding parts, the blow bar hold with the holding parts provided on the rotor and in accordance with claim 7 a rotor for impact mills, which consists of several rotor disks that pass through in all Rotor disks interrupted in alignment with one another are interrupted are, the edge recesses starting from the outer circumference of the rotor are inclined inwards against the direction of rotation of the rotor with blow bars.
- Such reversible but not reversible blow bars are in different Embodiments known. They are particularly suitable for impact mill rotors that are made of there are several disks attached to one axis, the circumference with Edge recesses are provided, in which the blow bars are inserted. Because at These rotors are also the blow bars between the discs on the inner Halves of their fronts exposed to wear, so that these surfaces are not considered Contact surfaces on the back can be used. When turning, i. H. at the Swiveling around a central transverse axis, the rear remains behind and the front front, only that the inner half is then outside and vice versa.
- the front contact surfaces of the blow bars are through in the area of the pane width the holding parts that fix them or through the leading ones arranged further outside Rotor disc parts, which form the blow bar holder, sufficiently against Wear protected.
- blow bar is known for example from DE 26 06 000 A1. She has, like many other known blow bars, an elongated cross section of constant width, but their cross-section points towards other blow bars a shape that is kinked backwards, aligning itself with that of the axis of symmetry nearby rear surfaces diagonally from the inside against appropriately trained Rotor disc parts created.
- the blow bar is held in engagement with these parts by wedges on the front, on the front and in the middle Contact surfaces of the blow bar provided perpendicular to the axis of symmetry act.
- the Contact surfaces for the wedges in the rotor disks on the front are in essentially radially aligned.
- the cross section of the known blow bar has a constant width and is conditional thereby also a wide outer surface that is essentially exposed to fretting.
- the front edge of a blow bar is decisive for good shredding a better effect should be built slightly inclined forward. By a such inclination, however, widens the outer surface even more, which is even more so Friction means wear.
- the ideal blow bar would be as thin as possible, as is approximately the case in DE 28 11 376 A1 is known.
- the blow bar described there is at most 40 mm thick considerable part of their height and is therefore only suitable for sand impact mills, at which the feed grain is only a small size.
- this is known bar designed for a reversing operation, so that its striking edge through Sharpening wear itself. This bar is not suitable for large impact mills, it would break with a correspondingly large feed material.
- the invention has for its object to provide a blow bar with the simplest possible cross-section, but which is relatively thin in the area of the striking edges and still withstands large forces by impact, which has favorable wear curves and thus leads to cost savings in operation, the other task in designing the blow bar and the rotor receiving the blow bar in such a way that, despite the simple cross section of the blow bar and simple design of the rotor, the required number of blow bars in the rotor can be fastened securely and inexpensively.
- the cross section of the blow bar essentially forms a double trapezoidal basic shape with the long base lines as the axis of symmetry, and the back of the blow bar corresponding to the height of each trapezoid at right angles to the axis of symmetry forms a flat surface above the height of the blow bar is aligned forming, and the contact surfaces provided on the rear of the blow bar are formed by a groove-like depression in the longitudinal direction of the blow bar and arranged at the level of the axis of symmetry.
- the bar according to the invention is relatively narrow and therefore has a corresponding low volume, is therefore inexpensive in terms of the need for cast material Production.
- the invention provides in a further embodiment that the axis of symmetry corresponding long baseline trapezoids are approximately twice as long, than the short baselines corresponding to the width of the outer surfaces. It is with Trapezoid or double trapezoid meant the basic shape of the cross section, under Neglect of the groove-like depression. This is also trapezoidal and has flat contact surfaces with which the blow bar against the firmly on Rotor provided holding parts.
- the Invention proposed on the end faces and from the back of the blow bar starting widening the groove-like depression with recesses for receiving to provide axially acting locking elements.
- Blow bar can be seen by turning each blow bar around its longitudinal axis in the circumferential direction of the
- the rotor is installed inclined in such a way that the outward-pointing sloping leg of the corresponding trapezes as an obelisk forming a face in relation to a through the rotor axis going to the outermost, with the rotating rotor the impact circle forming edge of the blow bar aligned cutting plane, and thus this outermost edge leads the other parts of the blow bar.
- a rotor which consists of a plurality of rotor disks, which are formed by in all rotor disks aligned with each other, are interrupted, with blow bars according to the invention, the edge recesses, as known from EP - 0666 111 A1, starting from the outer circumference of the rotor are inclined inward against the direction of rotation of the rotor.
- the related The object is achieved in that the edge recesses are fixed on the rotor provided holding parts are formed an abutment for the blow bars, so that each blow bar is inclined about its longitudinal axis in the direction of rotation of the rotor is installed in such a way that the outward-pointing oblique leg of the corresponding Trapezes as obelisk on the front forming a face in relation to one through the rotor axis to the outermost, with the rotating rotor the impact circle forming edge of the blow bars aligned cutting plane, and thus this outermost edge is leading the other parts of the blow bars.
- the movable holding parts between the front of the blow bars and the Support surfaces are provided on the rotor disks, hold the blow bars diagonally from the front and inside with the support provided on the rotor prism-shaped holding parts in engagement.
- a disadvantage of the rotor according to EP - 0 666 111 A1 is that the rear abutment, which overlaps each edge recess, is formed from loose holding parts with small ones Contact surfaces so that a secure mounting is not guaranteed.
- blow bar 1 has a mirror-symmetrical, elongated Cross section of a double trapezoidal basic shape according to the addition by dash-dotted lines.
- the long base lines a of each trapezoid correspond the axis of symmetry 2
- the short baselines correspond to the width of the outer surfaces Third
- the striking edges 4 are somewhat rounded and sloping towards the rear.
- the the back 5 of the blow bar 1 is corresponding height h of each trapeze aligned perpendicular to the axis of symmetry and thus forms a flat surface 6 over the Blow bar height 7.
- On the back 5 is at the level of the axis of symmetry Trapezoidal recess 8 is provided, the sides of which are flat contact surfaces 9 are formed, with which the blow bar against fixedly provided on the rotor holding parts 10 creates (Fig. 2).
- the front 11 of the blow bar has two striking surfaces 12, formed by the outward sloping legs of the trapezoids (as an obelisk) are.
- the groove-like depression 8 has the depression on both end faces 13 widening recesses 14 into which, as shown in FIG. 2, axially acting Interlocking elements 15 engage in pockets of the fixed holding parts 10 are slidably included.
- the blow bar elongated cross-section is, as shown in FIG. 2, inclined obliquely in the Installed rotor, which consists of several rotor disks 16.
- the discs show several edge recesses 17 for receiving a blow bar each.
- This Edge recesses are in the circumferential direction in front of the blow bar with another, for example Right-angled recess 18 for receiving a movable holding part 19 provided, which the blow bar with the fixed to the rotor holding parts 10 in Engagement holds.
- a rotor is shown in front view, but for reasons of simplification only equipped with a blow bar 1.
- the rotor axis around which the rotor corresponds accordingly Arrow 20 rotates, is marked with x.
- the one shown installed in the figure above Beating bar describes with its outer edge 4 a beating circle 21. From this edge a cutting plane 22 is guided to the rotor axis x.
- the blow bar is like this Figure clearly shows, installed inclined to the sectional plane 22 such that the striking edge 4th is leading to the face 12.
- the rotor consists of several Rotor disks 16 which are welded together at their hubs 23.
- the blow bar according to the invention is simple in its training and due to its slim form becomes relatively little of the expensive itself Wear material needed. Installation and removal are straightforward, too Reduction of maintenance costs helps.
Abstract
Description
Die Erfindung betrifft gemäß Anspruch 1 eine Schlagleiste für Prallmühlenrotoren mit zum Zwecke der Umwendbarkeit spiegelsymmetrischem, länglichem Querschnitt, die auf der in Umlaufrichtung des Rotors hinteren Seite Flächen aufweist, mit denen sie sich nach hinten und radial von innen her gegen fest am Rotor vorgesehene Halteteile anlegt und auf der vorderen Seite Anlageflächen für bewegliche Halteteile, die die Schlagleiste mit den fest am Rotor vorgesehenen Halteteilen in Eingriff halten und gemäß Anspruch 7 einen Rotor für Prallmühlen, der aus mehreren Rotorscheiben besteht, die durch in allen Rotorscheiben zueindander fluchtend angeordneten Randausnehmungen unterbrochen sind, wobei die Randausnehmungen vom äußeren Umfang des Rotors ausgehend entgegen der Drehrichtung des Rotors nach innen geneigt sind mit Schlagleisten.According to claim 1, the invention relates to a blow bar for impact mill rotors for the purpose of reversibility mirror-symmetrical, elongated cross-section, which on the rear side in the direction of rotation of the rotor has surfaces with which they to the rear and radially from the inside against fixed parts provided on the rotor and on the front side contact surfaces for movable holding parts, the blow bar hold with the holding parts provided on the rotor and in accordance with claim 7 a rotor for impact mills, which consists of several rotor disks that pass through in all Rotor disks interrupted in alignment with one another are interrupted are, the edge recesses starting from the outer circumference of the rotor are inclined inwards against the direction of rotation of the rotor with blow bars.
Derartige umwendbare aber nicht umdrehbare Schlagleisten sind in verschiedenen Ausführungsformen bekannt. Sie eignen sich besonders für Prallmühlenrotoren, die aus mehreren auf einer Achse befestigten Scheiben bestehen, die am Umfang mit Randausnehmungen versehen sind, in die die Schlagleisten eingesetzt werden. Denn bei diesen Rotoren werden die Schlagleisten zwischen den Scheiben auch auf den inneren Hälften ihrer Vorderseiten dem Verschleiß ausgesetzt, so daß diese Flächen nicht als Anlageflächen auf der Rückseite verwendet werden können. Beim Umwenden, d. h. beim Schwenken um eine Mittelquerachse, bleibt die Hinterseite hinten und die Vorderseite vorn, nur daß die innere Hälfte dann außen ist und umgekehrt.Such reversible but not reversible blow bars are in different Embodiments known. They are particularly suitable for impact mill rotors that are made of there are several disks attached to one axis, the circumference with Edge recesses are provided, in which the blow bars are inserted. Because at These rotors are also the blow bars between the discs on the inner Halves of their fronts exposed to wear, so that these surfaces are not considered Contact surfaces on the back can be used. When turning, i. H. at the Swiveling around a central transverse axis, the rear remains behind and the front front, only that the inner half is then outside and vice versa.
Im Bereich der Scheibenbreite sind die vorderen Anlageflächen der Schlagleisten durch die sie fixierenden Halteteile oder durch die voreilenden, weiter außen angeordneten Rotorscheibenteile, welche die Schlagleistenhalterung bilden, hinreichend gegen Verschleiß geschützt.The front contact surfaces of the blow bars are through in the area of the pane width the holding parts that fix them or through the leading ones arranged further outside Rotor disc parts, which form the blow bar holder, sufficiently against Wear protected.
Eine solche Schlagleiste ist beispielsweise aus der DE 26 06 000 A1 bekannt. Sie hat, wie viele andere bekannte Schlagleisten, einen länglichen Querschnitt von gleichbleibender Breite, ihr Querschnitt weist jedoch gegenüber anderen Schlagleisten eine nach hinten geknickte Form auf, wobei sie sich mit den der Symmetrieachse naheliegenden hinteren Flächen schräg von innen her gegen entsprechend ausgebildete Rotorscheibenteile anlegt. Mit diesen Teilen in Eingriff gehalten wird die Schlagleiste durch Keile auf der Vorderseite, die auf auf der vorderen Seite in der Mitte und senkrecht zur Symmetrieachse vorgesehene Anlageflächen der Schlagleiste wirken. Die Anlageflächen für die Keile in den Rotorscheiben auf der vorderen Seite sind im wesentlichen radial ausgerichtet.Such a blow bar is known for example from DE 26 06 000 A1. She has, like many other known blow bars, an elongated cross section of constant width, but their cross-section points towards other blow bars a shape that is kinked backwards, aligning itself with that of the axis of symmetry nearby rear surfaces diagonally from the inside against appropriately trained Rotor disc parts created. The blow bar is held in engagement with these parts by wedges on the front, on the front and in the middle Contact surfaces of the blow bar provided perpendicular to the axis of symmetry act. The Contact surfaces for the wedges in the rotor disks on the front are in essentially radially aligned.
Der Querschnitt der bekannten Schlagleiste hat eine gleichbleibende Breite und bedingt dadurch auch eine breite Außenfläche, die im wesentlichen Reibverschleiß ausgesetzt ist. Maßgeblich für eine gute Zerkleinerung ist die vordere Kante einer Schlagleiste, die für eine bessere Wirkung schwach nach vorne geneigt eingebaut sein sollte. Durch eine solche Neigung verbreitert sich jedoch die Außenfläche noch zusätzlich, was noch mehr Reibverschleiß bedeutet.The cross section of the known blow bar has a constant width and is conditional thereby also a wide outer surface that is essentially exposed to fretting. The front edge of a blow bar is decisive for good shredding a better effect should be built slightly inclined forward. By a such inclination, however, widens the outer surface even more, which is even more so Friction means wear.
Die ideale Schlagleiste wäre eine möglichst dünne, wie sie annähernd aus der DE 28 11 376 A1 bekannt ist. Die dort beschriebene Schlagleiste ist höchstens 40 mm dick über ein beträchtliches Teil ihrer Höhe und ist deshalb auch nur für Sandprallmühlen geeignet, bei denen das Aufgabekorn auch nur eine kleine Größe aufweist. Darüber hinaus ist diese bekannte Leiste für einen Reversierbetrieb ausgelegt, so daß ihre Schlagkante sich durch Verschleiß selbst schärft. Für große Prallmühlen ist diese Leiste nicht geeignet, sie würde bei entsprechend großem Aufgabegut zu Bruch gehen.The ideal blow bar would be as thin as possible, as is approximately the case in DE 28 11 376 A1 is known. The blow bar described there is at most 40 mm thick considerable part of their height and is therefore only suitable for sand impact mills, at which the feed grain is only a small size. In addition, this is known bar designed for a reversing operation, so that its striking edge through Sharpening wear itself. This bar is not suitable for large impact mills, it would break with a correspondingly large feed material.
Der Erfindung liegt die Aufgabe zugrunde, eine Schlagleiste mit möglichst einfachem
Querschnitt zu schaffen, die aber im Bereich der Schlagkanten verhältnismäßig dünn ist
und trotzdem großen Kräften durch Schlagwirkung widersteht, die günstige
Verschleißkurven aufweist und damit im Betrieb zu Kosteneinsparungen führt, dabei
besteht die weitere Aufgabe darin, die Schlagleiste und den die Schlagleiste
aufnehmenden Rotor so zu gestalten, daß trotz einfachem Querschnitt der Schlagleiste
und einfacher Ausbildung des Rotors eine sichere und preiswerte Befestigung der
erforderlichen Anzahl von Schlagleisten im Rotor gegeben ist.
Gelöst wird diese Aufgabe für die gattungsgemäße Schlagleiste erfindungsgemäß
dadurch, daß der Querschnitt der Schlagleiste im wesentlichen eine doppeltrapezförmige
Grundform bildet mit den langen Grundlinien als Symmetrieachse, und dabei die der
Höhe eines jeden Trapezes entsprechende Rückseite der Schlagleiste rechtwinklig zur
Symmetrieachse eine ebene Fläche über die Schlagleistenhöhe bildend ausgerichtet ist,
und die auf der Rückseite der Schlagleiste vorgesehenen Anlageflächen von einer
nutartigen Vertiefung in Längsrichtung der Schlagleiste verlaufend und in Höhe der
Symmetrieachse angeordnet gebildet sind.The invention has for its object to provide a blow bar with the simplest possible cross-section, but which is relatively thin in the area of the striking edges and still withstands large forces by impact, which has favorable wear curves and thus leads to cost savings in operation, the other task in designing the blow bar and the rotor receiving the blow bar in such a way that, despite the simple cross section of the blow bar and simple design of the rotor, the required number of blow bars in the rotor can be fastened securely and inexpensively.
This object is achieved for the generic blow bar according to the invention in that the cross section of the blow bar essentially forms a double trapezoidal basic shape with the long base lines as the axis of symmetry, and the back of the blow bar corresponding to the height of each trapezoid at right angles to the axis of symmetry forms a flat surface above the height of the blow bar is aligned forming, and the contact surfaces provided on the rear of the blow bar are formed by a groove-like depression in the longitudinal direction of the blow bar and arranged at the level of the axis of symmetry.
Die erfindungsgemäße Leiste ist verhältnismäßig schmal und hat damit ein entsprechend geringes Volumen, ist daher vom Bedarf an Gußwerkstoff her auch preiswert in der Herstellung.The bar according to the invention is relatively narrow and therefore has a corresponding low volume, is therefore inexpensive in terms of the need for cast material Production.
Die Erfindung sieht in weiterer Ausgestaltung vor, daß die der Symmetrieachse entsprechenden langen Grundlinien der Trapeze in etwa doppelt so lang ausgebildet sind, als die kurzen, der Breite der Außenflächen entsprechenden Grundlinien. Dabei ist mit Trapez bzw. Doppeltrapez die Grundform des Querschnitts gemeint, unter Vernachlässigung der nutartigen Vertiefung. Diese ist ebenfalls trapezartig ausgebildet und weist plane Anlageflächen auf, mit denen sich die Schlagleiste gegen die fest am Rotor vorgesehen Halteteile anlegt.The invention provides in a further embodiment that the axis of symmetry corresponding long baseline trapezoids are approximately twice as long, than the short baselines corresponding to the width of the outer surfaces. It is with Trapezoid or double trapezoid meant the basic shape of the cross section, under Neglect of the groove-like depression. This is also trapezoidal and has flat contact surfaces with which the blow bar against the firmly on Rotor provided holding parts.
Zur Festlegung der Schlagleiste in Achsrichtung wird in weiterer Ausgestaltung der Erfindung vorgeschlagen, an den Stirnseiten und von der Rückseite der Schlagleiste ausgehend die nutartige Vertiefung verbreiternd mit Ausnehmungen zur Aufnahme von axial wirkenden Verriegelungselementen zu versehen.To define the blow bar in the axial direction, the Invention proposed on the end faces and from the back of the blow bar starting widening the groove-like depression with recesses for receiving to provide axially acting locking elements.
Vorteilhaft ist es, wenn die Anlageflächen für die beweglichen Halteteile auf der Vorderseite der Schlagleiste durch die schrägen Flächen (Schenkel) des Doppeltrapezes (als Obelisks) selbst gebildet sind. Durch Verzicht auf separate, erhaben oder vertieft ausgebildete Flächen ergibt sich eine Verbilligung, wobei auf eine Bearbeitung der Anlageflächen verzichtet werden kann, weil die in den Rotor eingebaute Schlagleiste mit den beweglichen Halteteilen gegen die fest am Rotor vorgesehen Halteteile gehalten wird, vorzugsweise ohne die Schlagleiste fest einzuspannen.It is advantageous if the contact surfaces for the movable holding parts on the Front of the blow bar through the sloping surfaces (legs) of the double trapezoid (as obelisks) are formed themselves. By not using separate, raised or deepened trained areas there is a reduction in price, with a processing of Contact surfaces can be dispensed with, because the blow bar built into the rotor the movable holding parts against the holding parts provided on the rotor is, preferably without firmly clamping the blow bar.
Eine Weiterbildung der Erfindung ist in einer Verwendung der erfindungsgemäßen Schlagleiste zu sehen, indem jede Schlagleiste um ihre Längsachse in Umlaufrichtung des Rotors geneigt eingebaut ist derart, daß der nach außen weisende schräge Schenkel des entsprechenden Trapezes als Obelisk eine Schlagfläche bildend in Bezug auf eine durch die Rotorachse gehende, auf die äußerste, beim drehenden Rotor den Schlagkreis bildende Kante der Schlagleiste ausgerichtete Schnittebene vorgeneigt ist, und damit diese äußerste Kante gegenüber den übrigen Teilen der Schlagleiste voreilend ist.A development of the invention is in a use of the invention Blow bar can be seen by turning each blow bar around its longitudinal axis in the circumferential direction of the The rotor is installed inclined in such a way that the outward-pointing sloping leg of the corresponding trapezes as an obelisk forming a face in relation to a through the rotor axis going to the outermost, with the rotating rotor the impact circle forming edge of the blow bar aligned cutting plane, and thus this outermost edge leads the other parts of the blow bar.
Besonders vorteilhaft ist ein Rotor, der aus mehreren Rotorscheiben besteht, die durch in allen Rotorscheiben zueinander fluchtend angeordneten Randausnehmungen, unterbrochen sind, mit erfindungsgemäßen Schlagleisten, wobei die Randausnehmungen, wie aus der EP - 0666 111 A1 bekannt, vom äußeren Umfang des Rotors ausgehend entgegen der Drehrichtung des Rotors nach innen geneigt sind. Die hierauf bezogene Aufgabe wird dadurch gelöst, daß die Randausnehmungen von den fest am Rotor vorgesehenen Halteteilen ein Widerlager für die Schlagleisten bildend übergriffen sind, so daß jede Schlagleiste um ihre Längsachse in Umlaufrichtung des Rotors geneigt eingebaut ist derart, daß der nach außen weisende schräge Schenkel des entsprechenden Trapezes als Obelisk auf der Vorderseite eine Schlagfläche bildend in Bezug auf eine durch die Rotorachse gehende, auf die äußerste, beim drehenden Rotor den Schlagkreis bildende Kante der Schlagleisten ausgerichtete Schnittebene vorgeneigt ist, und damit diese äußerste Kante gegenüber den übrigen Teilen der Schlagleisten voreilend ist. Die beweglichen Halteteile, die zwischen der Vorderseite der Schlagleisten und den Abstützflächen an den Rotorscheiben vorgesehen sind, halten dabei die Schlagleisten schräg von vorn und innen her unterstützend mit den fest am Rotor vorgesehenen prismenförmigen Halteteilen in Eingriff.A rotor which consists of a plurality of rotor disks, which are formed by in all rotor disks aligned with each other, are interrupted, with blow bars according to the invention, the edge recesses, as known from EP - 0666 111 A1, starting from the outer circumference of the rotor are inclined inward against the direction of rotation of the rotor. The related The object is achieved in that the edge recesses are fixed on the rotor provided holding parts are formed an abutment for the blow bars, so that each blow bar is inclined about its longitudinal axis in the direction of rotation of the rotor is installed in such a way that the outward-pointing oblique leg of the corresponding Trapezes as obelisk on the front forming a face in relation to one through the rotor axis to the outermost, with the rotating rotor the impact circle forming edge of the blow bars aligned cutting plane, and thus this outermost edge is leading the other parts of the blow bars. The movable holding parts between the front of the blow bars and the Support surfaces are provided on the rotor disks, hold the blow bars diagonally from the front and inside with the support provided on the rotor prism-shaped holding parts in engagement.
Bei dem Rotor gemäß der EP - 0 666 111 A1 ist nachteilig, daß das hintere Widerlager, welches jede Randausnehmung übergreift, aus losen Halteteilen gebildet ist mit kleinen Anlageflächen, so daß eine sichere Halterung nicht gewährleistet ist.A disadvantage of the rotor according to EP - 0 666 111 A1 is that the rear abutment, which overlaps each edge recess, is formed from loose holding parts with small ones Contact surfaces so that a secure mounting is not guaranteed.
Die Erfindung wird anhand der Zeichnung erläutert, und zwar zeigen
- Fig. 1
- eine erfindungsgemäße Schlagleiste in Stirnansicht,
- Fig. 2
- eine gemäß der Erfindung in den Rotor eingebaute Schlagleiste, dargestellt in einem Ausschnitt des Rotors,
- Fig. 3
- einen Rotor gemäß der Erfindung mit eingebauter Schlagleiste in Stirnansicht.
- Fig. 1
- a blow bar according to the invention in front view,
- Fig. 2
- a blow bar built into the rotor according to the invention, shown in a section of the rotor,
- Fig. 3
- a rotor according to the invention with built-in blow bar in front view.
Wie Fig. 1 zeigt, hat die Schlagleiste 1 einen spiegelsymmetrischen, länglichen
Querschnitt von einer doppeltrapezförmigen Grundform entsprechend der Ergänzung
durch strichpunktierte Linien. Die langen Grundlinien a eines jeden Trapezes entsprechen
der Symmetrieachse 2, die kurzen Grundlinien entsprechen der Breite der Außenflächen
3.1 shows, the blow bar 1 has a mirror-symmetrical, elongated
Cross section of a double trapezoidal basic shape according to the addition
by dash-dotted lines. The long base lines a of each trapezoid correspond
the axis of
Die Schlagkanten 4 sind dabei etwas abgerundet und nach hinten schräg abfallend. Die
der Rückseite 5 der Schlagleiste 1 entsprechende Höhe h eines jeden Trapezes ist
rechtwinklig zur Symmetrieachse ausgerichtet und bildet so eine ebene Fläche 6 über die
Schlagleistenhöhe 7. Auf der Rückseite 5 ist in Höhe der Symmetrieachse eine
trapezförmige Vertiefung 8 vorgesehen, deren Seiten von planen Anlageflächen 9
gebildet sind, mit denen sich die Schlagleiste gegen fest am Rotor vorgesehene Halteteile
10 anlegt (Fig. 2). The
Entsprechend Fig. 1 weist die Vorderseite 11 der Schlagleiste zwei Schlagflächen 12 auf,
die von den nach außen weisenden schrägen Schenkel der Trapeze (als Obeliske) gebildet
sind. Die nutartige Vertiefung 8 weist an beiden Stirnseiten 13 die Vertiefung
verbreiternd Ausnehmungen 14 auf, in die, wie Fig. 2 zeigt, axial wirkende
Verriegelungselemente 15 eingreifen, die in Taschen der festen Halteteile 10
verschieblich enthalten sind.1, the
Die Schlagleiste länglichen Querschnitts ist, wie Fig. 2 zeigt, schräg vorgeneigt in den
Rotor eingebaut, der aus mehreren Rotorscheiben 16 besteht. Die Scheiben weisen
mehrere Randausnehmungen 17 zur Aufnahme je einer Schlagleiste auf. Diese
Randausnehmungen sind in Umlaufrichtung vor der Schlagleiste mit einer weiteren, etwa
rechtwinklig ausgebildeten Ausnehmung 18 zur Aufnahme eines beweglichen Halteteiles
19 versehen, welches die Schlagleiste mit dem fest am Rotor vorgesehen Halteteile 10 in
Eingriff hält.The blow bar elongated cross-section is, as shown in FIG. 2, inclined obliquely in the
Installed rotor, which consists of
In Fig. 3 ist ein Rotor in Stirnansicht dargestellt, aus Vereinfachungsgründen jedoch nur
mit einer Schlagleiste 1 ausgestattet. Die Rotorachse, um die der Rotor entsprechend
Pfeil 20 dreht, ist mit x bezeichnet. Die in der Figur oben eingebaut dargestellte
Schlagleiste beschreibt mit ihrer äußeren Kante 4 einen Schlagkreis 21. Von dieser Kante
aus ist eine Schnittebene 22 zur Rotorachse x geführt. Die Schlagleiste ist, wie diese
Figur deutlich zeigt, zur Schnittebene 22 geneigt eingebaut derart, daß die Schlagkante 4
gegenüber der Schlagfläche 12 voreilend ist. Der Rotor besteht aus mehreren
Rotorscheiben 16, die an ihren Naben 23 zusammengeschweißt sind.In Fig. 3, a rotor is shown in front view, but for reasons of simplification only
equipped with a blow bar 1. The rotor axis around which the rotor corresponds accordingly
Die erfindungsgemäße Schlagleiste ist einfach in ihrer Ausbildung und aufgrund ihrer schlanken Form wird nur verhältnismäßig wenig von dem an sich teuren Verschleißwerkstoff benötigt. Auch der Ein- und Ausbau sind unkompliziert, was zur Reduzierung der Unterhaltungskosten beiträgt.The blow bar according to the invention is simple in its training and due to its slim form becomes relatively little of the expensive itself Wear material needed. Installation and removal are straightforward, too Reduction of maintenance costs helps.
Claims (8)
- Blow bar 1 of an impact crusher rotor which, for the purpose of reversibility, has a mirror-symmetrical longitudinal cross-section and which features surfaces (6, 9) at the rear as viewed in the rotation direction (20) of the rotor, by means of which the blow bar is supported to the rear and radially from the inside against retaining pieces (10) securely provided on the rotor, and at the front with contact surfaces (12) for movable retaining pieces (19) which hold the blow bar in engagement with the retaining pieces (10) securely provided on the rotor, characterised in that the cross-section of the blow bar (1) constitutes essentially a double trapezium shape with the long bases (a) as symmetrical axis (2), whereby the rear face (5) of the blow bar (1) corresponding to the height (h) of each trapezium is arranged at right-angles to the symmetrical axis to form a level surface (6) over the length of the blow bar height (7), and the support surfaces (9) provided on the rear side (5) of the blow bar (1) are formed by a groove-like recess (8) running in the longitudinal direction of the blow bars at a level with the symmetrical axis.
- Blow bar according to claim 1, characterised in that the longer bases of the trapeziums corresponding to the symmetrical axis (2) are approximately twice the length of the shorter bases corresponding to the width of the outer surfaces (3).
- Blow bar according to claim 1, characterised in that the groove-like recesses (8) have a trapezium-shaped cross-section and feature flat support surfaces (9) for the retaining pieces (10) securely provided on the rotor.
- Blow bar according to claim 1, characterised in that recesses (14) which widen the groove-like recess (8) are provided on the front faces (13) starting from the rear face (5) of the blow bar to accommodate axially effective interlocking elements (15).
- Blow bar according to claim 1, characterised in that the support surfaces for the movable retaining pieces (19) on the front face (11) of the blow bar (1) are themselves formed by the sloping surfaces of the double trapezium.
- The application of blow bars according to claim 1, characterised in that each blow bar (1) is slopingly fitted around its longitudinal axis in the rotation direction of the rotor in such a way that the outwardly directed oblique side of the corresponding trapezium as an obelisk forming an impact surface (12) is forwardly inclined with respect to a sectional plane (22) passing through the rotor axis (x) towards the outermost edge (4) of the blow bar forming the impact circle (21) when the rotor is turning, so that this outermost edge is leading with respect to the other parts of the blow bar.
- Rotor for impactors comprising a plurality of rotor discs (16) which are interrupted by peripheral recesses (17, 18) arranged in alignment with each other in all rotor discs, whereby commencing at the outer circumference of the rotor the peripheral recesses are inwardly inclined counter to the rotation direction of the rotor and fitted with blow bars according to claim 1, characterised in that the peripheral recesses (17, 18) are overlapped by the retaining pieces (10) securely provided on the rotor to form a support for the blow bars (1), so that each blow bar (1) is slopingly fitted around its longitudinal axis in the rotation direction (20) of the rotor in such a way that the front face (11) of the outwardly-directed oblique side of the corresponding trapezium as obelisk forming an impact surface (12) is forwardly inclined with respect to a sectional plane (22) passing through the rotor axis (x) towards the outermost edge (4) of the blow bar forming the impact circle (21) when the rotor is turning, so that this outermost edge is leading with respect to the other parts of the blow bar.
- Rotor according to claim 7, characterised in that the prism-shaped retaining pieces (10) securely provided on the rotor feature level surfaces as complementary elements to the groove-like recesses (8) in the blow bars (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813308A DE19813308C2 (en) | 1998-03-26 | 1998-03-26 | Blow bar for impact mill rotors and rotor for impact mills |
| DE19813308 | 1998-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0945181A1 EP0945181A1 (en) | 1999-09-29 |
| EP0945181B1 true EP0945181B1 (en) | 2003-05-07 |
Family
ID=7862386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99104665A Expired - Lifetime EP0945181B1 (en) | 1998-03-26 | 1999-03-09 | Blow bar for impact mill rotors and rotor for impact mills |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US6129300A (en) |
| EP (1) | EP0945181B1 (en) |
| JP (1) | JPH11319598A (en) |
| KR (1) | KR19990078183A (en) |
| AT (1) | ATE239551T1 (en) |
| AU (1) | AU753127B2 (en) |
| BR (1) | BR9901031A (en) |
| CA (1) | CA2265074A1 (en) |
| DE (2) | DE19813308C2 (en) |
| DK (1) | DK0945181T3 (en) |
| ES (1) | ES2196664T3 (en) |
| ZA (1) | ZA991970B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813310C1 (en) * | 1998-03-26 | 1999-10-28 | Noell Serv & Maschtechn Gmbh | Impact mill rotor |
| US6318148B1 (en) * | 2000-08-02 | 2001-11-20 | Dietrick E. Alkonis | Tester for impact performance |
| DE10048699C1 (en) * | 2000-09-30 | 2002-01-31 | Hazemag & Epr Gmbh | 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 |
| DE20314137U1 (en) * | 2003-09-10 | 2003-11-27 | Schenk, Jürgen | Excavation device |
| DE102005052191A1 (en) * | 2005-10-28 | 2007-05-03 | Knecht Maschinenbau Gmbh | meat cutter |
| US7753302B2 (en) | 2005-12-08 | 2010-07-13 | Swissrtec Gmbh | Rotor for an impact crusher |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE930839C (en) * | 1951-10-11 | 1955-07-25 | Westfalia Dinnendahl Groeppel | Rotor for centrifugal mills |
| DE1745885U (en) * | 1957-03-07 | 1957-05-29 | Miag Muehlenbau & Ind Gmbh | BLOW BAR FOR IMPACT CRUSHER. |
| DE2606000A1 (en) * | 1976-02-14 | 1977-08-25 | Hazemag Andreas Kg | BLOW BAR FOR IMPACT MILL ROTORS |
| DE2811376C3 (en) * | 1978-03-16 | 1980-09-25 | Hazemag Dr. E. Andreas Gmbh & Co, 4400 Muenster | Rotor for impact mills, especially for sand impact mills |
| DE3244193C2 (en) * | 1982-11-30 | 1986-09-11 | Karl 8901 Königsbrunn Egger | Impact mill |
| DE3525442C2 (en) * | 1985-07-17 | 1994-10-20 | Hermann Schroedl | Blow bar for an impact crusher rotor |
| US5004169A (en) * | 1989-11-22 | 1991-04-02 | Cedarapids, Inc. | Impeller bar assembly with adjustable locking mechanism |
| US5042733A (en) * | 1990-08-06 | 1991-08-27 | Hans Hench | Rotary cutter, particularly for granulating plastic material |
| US5381973A (en) * | 1992-08-26 | 1995-01-17 | Noell Service Und Maschinentechnik Gmbh | Rotor for impact crushes or hammer mills |
| US5320292A (en) * | 1992-11-06 | 1994-06-14 | Smith Roger G | Mounting for replaceable hammers in impact crusher |
| DE9422120U1 (en) * | 1993-08-26 | 1998-04-30 | Boehringer Paul | Impact crusher with blow bars |
| BE1008041A3 (en) * | 1994-02-04 | 1996-01-03 | Magotteaux Int | Rotor for a crusher percussion. |
-
1998
- 1998-03-26 DE DE19813308A patent/DE19813308C2/en not_active Expired - Fee Related
-
1999
- 1999-03-09 CA CA002265074A patent/CA2265074A1/en not_active Abandoned
- 1999-03-09 EP EP99104665A patent/EP0945181B1/en not_active Expired - Lifetime
- 1999-03-09 DE DE59905393T patent/DE59905393D1/en not_active Expired - Lifetime
- 1999-03-09 ES ES99104665T patent/ES2196664T3/en not_active Expired - Lifetime
- 1999-03-09 AT AT99104665T patent/ATE239551T1/en not_active IP Right Cessation
- 1999-03-09 DK DK99104665T patent/DK0945181T3/en active
- 1999-03-11 ZA ZA9901970A patent/ZA991970B/en unknown
- 1999-03-18 US US09/271,761 patent/US6129300A/en not_active Expired - Fee Related
- 1999-03-24 KR KR1019990009979A patent/KR19990078183A/en not_active Application Discontinuation
- 1999-03-25 BR BR9901031-3A patent/BR9901031A/en not_active IP Right Cessation
- 1999-03-25 JP JP11081839A patent/JPH11319598A/en active Pending
- 1999-03-25 AU AU21413/99A patent/AU753127B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE19813308C2 (en) | 2002-02-28 |
| ES2196664T3 (en) | 2003-12-16 |
| JPH11319598A (en) | 1999-11-24 |
| DE59905393D1 (en) | 2003-06-12 |
| AU753127B2 (en) | 2002-10-10 |
| EP0945181A1 (en) | 1999-09-29 |
| US6129300A (en) | 2000-10-10 |
| ZA991970B (en) | 1999-09-27 |
| ATE239551T1 (en) | 2003-05-15 |
| AU2141399A (en) | 1999-10-07 |
| KR19990078183A (en) | 1999-10-25 |
| DK0945181T3 (en) | 2003-09-01 |
| DE19813308A1 (en) | 1999-10-07 |
| CA2265074A1 (en) | 1999-09-26 |
| BR9901031A (en) | 2000-03-08 |
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