EP0787529A1 - Rotor for impact crusher - Google Patents

Rotor for impact crusher Download PDF

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Publication number
EP0787529A1
EP0787529A1 EP97200174A EP97200174A EP0787529A1 EP 0787529 A1 EP0787529 A1 EP 0787529A1 EP 97200174 A EP97200174 A EP 97200174A EP 97200174 A EP97200174 A EP 97200174A EP 0787529 A1 EP0787529 A1 EP 0787529A1
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EP
European Patent Office
Prior art keywords
beater
bar
beaters
rotor
rotor according
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.)
Withdrawn
Application number
EP97200174A
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German (de)
French (fr)
Inventor
Guy Germay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magotteaux International SA
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Magotteaux International SA
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Filing date
Publication date
Application filed by Magotteaux International SA filed Critical Magotteaux International SA
Publication of EP0787529A1 publication Critical patent/EP0787529A1/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
    • B02C13/26—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 present invention relates to a rotor for an impact crusher comprising a series of discs fixed on an axis of rotation, a series of symmetrical longitudinal beaters, radially projecting from the discs and arranged in open and aligned peripheral housings of the discs and a system. of fixing to hold the beaters, in a removable way, in their housing.
  • This kind of crusher is commonly used, for example, for crushing rocks, recycling debris, etc.
  • the material to be crushed is poured onto the rotor which is driven around its axis of rotation and the crushing of the material is produced either under the impact of the beaters, or when the material shatters against screens onto which it is projected by the rotor. Due to the intensity of the impact on the beaters, they are exposed to rapid wear and must be replaced relatively often. To halve the frequency of replacement of the beaters, it is known to use symmetrical beaters which can be turned over when their leading face is worn.
  • the document AT-B-351906 proposes a rotor with symmetrical beaters which can be turned over when one of their attack faces is worn.
  • the beaters have, on their front and rear flanks, two symmetrical grooves with rounded section and are held in place on the rear flank by a round rod and, on the front flank, by wedges fixed by wedge effect on pointed noses forming the outer edge of the housing.
  • These beaters are not rigidly fixed and can oscillate around their rod and holding wedge to lock in a determined position under the effect of centrifugal force. Since there is no rigid attachment, the beaters must be made of a relatively ductile material, such as steel or manganese, this however at the expense of wear resistance.
  • the wedges can only be released tangentially from the nose on which they are stuck.
  • the beaters must therefore be released axially from the rotor with a view to their overturning or replacement, which often constitutes a handicap.
  • the object of the present invention is to provide a new crusher rotor with an improved fastening system for the beaters which facilitates the replacement and reversal of the beaters and which ensures a rigid and intimate tightening of the beaters in their housing thus allowing the use of very hard alloys for the realization of the beaters.
  • the rotor proposed by the present invention is characterized in that the fixing system comprises two distribution bars arranged in said housings on either side of each beater and extending over the entire length of the beater, in that one of the bars is associated with an axial and radial positioning system of the beater and in that the opposite bar has a longitudinal groove into which are introduced, by sliding, a series of fixing blocks with progressive tightening by means clamping wedges which are movable in a direction having a radial component and a tangential component with respect to a diametrical plane of the rotor.
  • This system for fixing the beaters allows a rigid connection between the beaters and the rotor and, therefore, the use of very hard alloy for the manufacture of the beaters.
  • the beater is perfectly held and tightened over its entire length.
  • each distribution bar is preferably covered with a removable wear bar which provides a perfectly flat bearing surface over the entire length of the beater and thus ensures good reception and transmission of shocks. In the event of wear, these bars can be replaced without the need to replace the distribution bars.
  • the axial and radial positioning system can consist of two cylindrical studs screwed to the two opposite ends of the distribution bar and extending longitudinally in corresponding opposite housings of the bar and the beater.
  • Each fixing block has, on the outside, a shoe of complementary section to the groove of the bar in which it is engaged and, on the inside, an inclined slide in which is slidably nested an inclined face of the wedge clamping whose opposite face is flat and whose base is slidably engaged in a shoe which is connected by means of clamping screws to the fixing block.
  • the slide of the fixing block preferably has a dovetail section and the clamping corner of the bevelled side edges of complementary shape.
  • Each beater has, in the middle region, two opposite flat faces which are preferably provided with tongues or machined studs serving as support, on one side, to the flat faces of the clamping corners and, on the other side , to the distribution bar.
  • tongues or machined studs serving as support, on one side, to the flat faces of the clamping corners and, on the other side , to the distribution bar.
  • the rotor shown in Figure 1 consists essentially of a series of discs 10 which are fixed on a central axis not shown, actuated by a suitable motor to rotate the set of discs.
  • Each of the discs 10 has, at its periphery, a series of recesses or housings 12 aligned longitudinally one on the other.
  • a beater 14 In each row of housing 12 is disposed a beater 14 as shown in Figure 2 which is intended to strike the material to be crushed during the rotation of the rotor.
  • each beater 14 has a symmetrical shape relative to a radial plane of the rotor, with two symmetrical attack faces 16 and 18, which allows the beater 14, in case of wear, for example face 16, to be turned over to work with face 18.
  • the beater In the middle region, between these two attack faces 16 and 18, the beater has two opposite flat faces 20, 22, the leading edges 16 and 18 being slightly inclined relative to the faces 20, 22 so as to give the beater a section in the form of an "S" stretched.
  • each beater 14 On each of the two sides 20 and 22 of each beater 14 are provided machined support points, either in the form of an isolated stud as shown in 24, or in the form of an elongated tongue as shown in 26, or a combination of the two . These studs 24 or tongues 26 form perfectly flat bearing surfaces without the need to have to machine the entire surface of the sides 20 and 22.
  • the housings 12 of the beaters 14 are lined laterally by distribution bars 28, 30 which extend over the entire length of the rotor and which are fixed, for example, by welding on the discs 10. These bars 28, 30 are intended to distribute the stresses resulting from the tightening of the beaters 14 as well as that of the shocks, during work, on the discs 10 and the rotor assembly.
  • wear bars 32 and 34 which are screwed onto the distribution bars and which serve as bearing surfaces for the beaters 14 and the fixing blocks thereof. These bars 32 and 34 which receive and transmit shocks and stresses to the distribution bars 28 and 30 can be easily replaced in the event of wear.
  • One of the distribution bars in the example shown, the bar 28, is associated with means for axial and radial positioning of a beater 14.
  • These means consist of two cylindrical studs 36 which are engaged in semi-housings -cylindrical corresponding to the two ends of the bar 28 and its wear bar 32.
  • These studs 36 also comprise, each, an enlarged head 38, respectively fixed for example by means of screws 40 on the opposite sides of the bar 28.
  • the beater 14 for its part, comprises (see FIG. 2), on each of its sides 20 and 22 and at each of its ends, also semi-cylindrical housings 42, complementary to the studs 36 and semi-cylindrical housings 44 enlarged, complementary to their head 38 to receive it (see also Figure 3).
  • the radial position of the beater 14 relative to the bar 28 is therefore perfectly determined thanks to these studs 36 and their head 38 as well as their housings in the bar 28 and in the beater 14.
  • the enlarged head 38 of the studs 36 also determines , the axial position of the beater relative to the rotor. This radial and axial positioning offers great ease during assembly of the beater and constitutes a security against possible release under the effect of centrifugal force during operation.
  • the beater 14 On the side opposite to the radial and axial positioning, the beater 14 is associated with a tangential fixing and clamping system (see Figure 3).
  • the rotor and the beater are designed to turn in a clockwise direction, that is to say that the means for positioning the beater are, seen in the direction of rotation, behind the beater 14 and the fixing means in front.
  • this arrangement deserves preference because of the large bearing and shock absorption surface provided by the distribution bar 28 behind the beater 14, it is possible to reverse the system by providing for positioning in front of the beater 14 and the fixing behind.
  • the fixing is ensured by a series of fixing blocks 50 (see Figure 1), one of them being shown in perspective in Figure 4.
  • the number of these blocks 50 is variable, in particular depending on the application which can be adapted as required. The more fixing blocks there are, the better the fixing and the connection between the beater 14 and the rotor. On the other hand, the assembly and disassembly of a beater will be all the faster when there are fewer fixing blocks 50.
  • each block 50 comprises, for this purpose, on the rear face, a pad 54 of section complementary to that of the groove 52.
  • a slide 56 inclined with respect to a diametrical plane of the rotor so that, when the blocks 50 are in place, the slide is, on the outside of the housings 12, closer to the beater 14 than on the inside.
  • a clamping wedge 58 with a flat front face 60 and a rear face 62 (see Figure 3) which has, relative to the flat face 60, the same inclination as the slide 56. Consequently, when the corner 58 slides in the slide 56, its front face 60 undergoes a translation parallel to itself with a tangential component relative to the beaters 14.
  • the slide 56 has, in the example presented, inclined and re-entrant lateral edges 56a, 56b giving the slide a dovetail section, while the corner 58 has longitudinal lateral edges 58a with corresponding outward inclination.
  • Other shapes, such as hammer head or other, are possible to prevent the lateral dislocation of these two parts.
  • the base of the corner 58 is engaged by transverse sliding in a shoe 62 which can be connected to the block 50 using tightening bolts 64, 66.
  • the shoe 62 makes the corner 60 slide in the slide 56 which, in turn, imposes on the corner 58 a component of transverse movement in the tangential direction of the rotor. Since the shoe must remain aligned with the block 50 because of the bolts 64, 66, the sliding of the corner 60 in the block 50 also generates a relative transverse sliding movement between the corner 58 and the shoe 62.
  • the rotor For mounting a beater 14, the rotor is rotated in a determined angular position, for example, so that the housing of the beater is oriented at nine o'clock.
  • the positioning pads 36 are then put in place which are made to hold by their fixing screws 40.
  • the beater 14 can then be engaged radially in its housing and be deposited on the wear bar 32, while the correct positioning is achieved by tightening the screws 40 of the positioning pads.
  • On the upper side of the beater 14 are then threaded a desired number of fixing blocks 50, in the loose state, into the groove 52 of the bar 30 and positioned correctly, preferably regularly in the longitudinal direction.
  • each of the blocks 50 are tightened, which causes the corners 58 to slide in the slide 56 and a tangential tightening movement in the direction of the beater 14 on the tabs 26 or machined studs 24 thereof. this.
  • the beater 14 is firmly anchored in its housing with a rigid and uniform connection over the entire length with the rotor.
  • the disassembly of a beater is done according to the same scenario in reverse order. After the bolts 64 and 66 of the blocks 50 have been loosened, it may however be necessary to unlock the corners 58 by hammer blows on their heads. In the event of significant fouling, it is always possible to cut the bolts between the shoes 62 and the blocks 50.
  • the fixing blocks 50 offer the advantage of easy access of the bolts 64 and 66 for tightening or loosening.

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

Abstract

The rotor comprises a series of discs (10) fixed to a rotary shaft and equipped with a series of symmetrical lengthwise beaters (14) which are set in recesses (12) and project radially from the discs. The beaters are held in place in the disc recesses by bars (28, 30) which extend along the whole length of the beaters. One of the bars (28) in each pair is associated with an axial and radial positioning system for the beaters, while the opposite one (30) has a lengthwise channel (52) for fixing elements (50) with wedges (58). The wedges are able to move in a direction possessing radial and tangential components in relation to the rotor's diametrical plane. In addition, the inner face of each bar (28, 30) is equipped with a detachable wear plate (32, 34).

Description

La présente invention concerne un rotor pour concasseur à percussion comprenant une série de disques fixés sur un axe de rotation, une série de battoirs longitudinaux symétriques, radialement en saillie par rapport aux disques et disposés dans des logements périphériques ouverts et alignés des disques et un système de fixation pour maintenir les battoirs, de manière amovible, dans leur logement.The present invention relates to a rotor for an impact crusher comprising a series of discs fixed on an axis of rotation, a series of symmetrical longitudinal beaters, radially projecting from the discs and arranged in open and aligned peripheral housings of the discs and a system. of fixing to hold the beaters, in a removable way, in their housing.

Ce genre de concasseur est couramment utilisé, par exemple, pour le concassage de roches, le recyclage de débris etc... La matière à concasser est déversée sur le rotor qui est entraîné autour de son axe de rotation et le concassage de la matière se produit soit sous le choc des battoirs, soit lorsque la matière se fracasse contre des écrans sur lesquels elle est projetée par le rotor. Vu l'intensité des chocs au niveau des battoirs, ceux-ci sont exposés à une usure rapide et ils doivent être remplacés relativement souvent. Pour réduire de moitié la fréquence de remplacement des battoirs, il est connu d'utiliser des battoirs symétriques qui peuvent être retournés lorsque leur face d'attaque est usée.This kind of crusher is commonly used, for example, for crushing rocks, recycling debris, etc. The material to be crushed is poured onto the rotor which is driven around its axis of rotation and the crushing of the material is produced either under the impact of the beaters, or when the material shatters against screens onto which it is projected by the rotor. Due to the intensity of the impact on the beaters, they are exposed to rapid wear and must be replaced relatively often. To halve the frequency of replacement of the beaters, it is known to use symmetrical beaters which can be turned over when their leading face is worn.

Le document AT-B-351906 propose un rotor à battoirs symétriques qui peuvent être retournés lorsqu'une de leurs faces d'attaque est usée. Les battoirs comportent, sur leurs flancs avant et arrière, deux gorges symétriques à section arrondie et sont maintenues en place sur le flanc arrière par une tige ronde et, sur le flanc avant, par des cales fixées par effet de coin sur des nez pointus formant le bord extérieur des logements. Ces battoirs ne sont pas fixés de manière rigide et peuvent osciller autour de leur tige et cale de maintien pour se bloquer dans une position déterminée sous l'effet de la force centrifuge. Étant donné qu'il n'y a pas de fixation rigide, les battoirs doivent être en une matière relativement ductile, telle que de l'acier ou du manganèse, ceci toutefois au dépens de la résistance à l'usure.The document AT-B-351906 proposes a rotor with symmetrical beaters which can be turned over when one of their attack faces is worn. The beaters have, on their front and rear flanks, two symmetrical grooves with rounded section and are held in place on the rear flank by a round rod and, on the front flank, by wedges fixed by wedge effect on pointed noses forming the outer edge of the housing. These beaters are not rigidly fixed and can oscillate around their rod and holding wedge to lock in a determined position under the effect of centrifugal force. Since there is no rigid attachment, the beaters must be made of a relatively ductile material, such as steel or manganese, this however at the expense of wear resistance.

Dans ce battoir, les cales peuvent seulement être dégagées tangentiellement du nez sur lequel elles sont coincées. Les battoirs doivent donc être dégagés axialement du rotor en vue de leur retournement ou remplacement, ce qui constitue souvent un handicap.In this beater, the wedges can only be released tangentially from the nose on which they are stuck. The beaters must therefore be released axially from the rotor with a view to their overturning or replacement, which often constitutes a handicap.

Le document DE-A-2147920 décrit un rotor avec des battoirs qui sont maintenus en place par des cales amovibles qui permettent un dégagement radial des battoirs. Toutefois, ces battoirs présentent l'inconvénient de ne pas être symétriques, donc de ne pas pouvoir être retournés lorsque leur face d'attaque est usée. En outre, il n'y a pas non plus de fixation rigide des battoirs, donc pas de possibilité de mettre en oeuvre des matériaux avec des propriétés de résistance optimales à l'usure.Document DE-A-2147920 describes a rotor with beaters which are held in place by removable wedges which allow radial disengagement of the beaters. However, these beaters have the disadvantage of not being symmetrical, therefore of not being able to be turned over when their leading face is worn. In addition, there is also no rigid fixing of the beaters, therefore no possibility of using materials with optimum resistance to wear properties.

D'autres rotors connus ont des systèmes de fixation à cale unique s'étendant sur toute la longueur des battoirs. Bien que ce système soit en mesure d'assurer un bon blocage des battoirs contre une surface d'appui, ils ne peuvent garantir un contact parfait et uniforme sur toute la longueur du battoir. Or, il ne faut pas oublier que les battoirs sont des pièces de fonderie qui ne subissent qu'un ébarbage grossier sans usinage et qui, de ce fait, ne sont pas toujours rectilignes et peuvent même présenter une ou plusieurs flèches. Il s'en suit que les battoirs sont seulement en certains endroits en contact avec les surfaces d'appui ou de serrage et pas à d'autres, ce qui augmente considérablement les risques de rupture des battoirs.Other known rotors have single shim fixing systems extending over the entire length of the beaters. Although this system is able to ensure good blocking of the beaters against a support surface, they cannot guarantee perfect and uniform contact over the entire length of the beater. However, it should not be forgotten that the beaters are foundry parts which only undergo coarse deburring without machining and which, therefore, are not always rectilinear and may even have one or more arrows. It follows that the beaters are only in certain places in contact with the bearing or clamping surfaces and not in others, which considerably increases the risks of breakage of the beaters.

Le but de la présente invention est de prévoir un nouveau rotor pour concasseur avec un système de fixation perfectionné des battoirs qui facilite le remplacement et le retournement des battoirs et qui assure un serrage rigide et intime des battoirs dans leur logement permettant ainsi l'usage d'alliages très durs pour la réalisation des battoirs.The object of the present invention is to provide a new crusher rotor with an improved fastening system for the beaters which facilitates the replacement and reversal of the beaters and which ensures a rigid and intimate tightening of the beaters in their housing thus allowing the use of very hard alloys for the realization of the beaters.

Pour atteindre cet objectif, le rotor proposé par la présente invention est caractérisé en ce que le système de fixation comporte deux barres de répartition disposées dans lesdits logements de part et d'autre de chaque battoir et s'étendant sur toute la longueur du battoir, en ce que l'une des barres est associée à un système de positionnement axial et radial du battoir et en ce que la barre opposée comporte une gorge longitudinale dans laquelle sont introduits, par glissement, une série de blocs de fixation à serrage progressif au moyen de coins de serrage qui sont déplaçables dans une direction ayant une composante radiale et une composante tangentielle par rapport à un plan diamétral du rotor.To achieve this objective, the rotor proposed by the present invention is characterized in that the fixing system comprises two distribution bars arranged in said housings on either side of each beater and extending over the entire length of the beater, in that one of the bars is associated with an axial and radial positioning system of the beater and in that the opposite bar has a longitudinal groove into which are introduced, by sliding, a series of fixing blocks with progressive tightening by means clamping wedges which are movable in a direction having a radial component and a tangential component with respect to a diametrical plane of the rotor.

Ce système de fixation des battoirs permet une liaison rigide entre les battoirs et le rotor et, de ce fait, l'usage d'alliage très dur pour la fabrication des battoirs.This system for fixing the beaters allows a rigid connection between the beaters and the rotor and, therefore, the use of very hard alloy for the manufacture of the beaters.

Grâce au serrage individuel des différents blocs de fixation, le battoir est parfaitement maintenu et serré sur toute sa longueur.Thanks to the individual clamping of the different fixing blocks, the beater is perfectly held and tightened over its entire length.

Les faces intérieures de chaque barre de répartition sont, de préférence, recouvertes d'une barrette d'usure amovible qui offre une surface d'appui parfaitement plane sur toute la longueur du battoir et assure ainsi une bonne réception et transmission des chocs. En cas d'usure, ces barrettes peuvent être remplacées sans nécessité de remplacer les barres de répartition.The inner faces of each distribution bar are preferably covered with a removable wear bar which provides a perfectly flat bearing surface over the entire length of the beater and thus ensures good reception and transmission of shocks. In the event of wear, these bars can be replaced without the need to replace the distribution bars.

Le système de positionnement axial et radial peut être constitué de deux plots cylindriques vissés aux deux extrémités opposées de la barre de répartition et s'étendant longitudinalement dans des logements opposés correspondants de la barre et du battoir.The axial and radial positioning system can consist of two cylindrical studs screwed to the two opposite ends of the distribution bar and extending longitudinally in corresponding opposite housings of the bar and the beater.

Chaque bloc de fixation comporte, du côté extérieur, un patin de section complémentaire à la gorge de la barre dans laquelle il est engagé et, du côté intérieur, une glissière inclinée dans laquelle est imbriquée, de manière coulissante, une face inclinée du coin de serrage dont la face opposée est plane et dont la base est engagée de manière coulissante dans un sabot qui est relié à l'aide de vis de serrage au bloc de fixation.Each fixing block has, on the outside, a shoe of complementary section to the groove of the bar in which it is engaged and, on the inside, an inclined slide in which is slidably nested an inclined face of the wedge clamping whose opposite face is flat and whose base is slidably engaged in a shoe which is connected by means of clamping screws to the fixing block.

La glissière du bloc de fixation comporte, de préférence, une section en queue d'aronde et le coin de serrage des bords latéraux biseautés de forme complémentaire.The slide of the fixing block preferably has a dovetail section and the clamping corner of the bevelled side edges of complementary shape.

Chaque battoir comporte, dans la région médiane, deux faces opposées planes qui sont, de préférence, pourvue de languettes ou de plots usinés servant d'appui, d'un côté, aux faces planes des coins de serrage et, de l'autre côté, à la barre de répartition. Ces languettes ou plots permettent d'avoir également, du côté du battoir, une surface parfaitement plane et de contribuer ainsi au maintien sur toute la longueur.Each beater has, in the middle region, two opposite flat faces which are preferably provided with tongues or machined studs serving as support, on one side, to the flat faces of the clamping corners and, on the other side , to the distribution bar. These tabs or studs also make it possible to have, on the side of the beater, a perfectly flat surface and thus contribute to the maintenance over the entire length.

D'autres particularités et caractéristiques de l'invention ressortiront de la description d'un mode de réalisation préféré, présenté ci-dessous, à titre d'illustration, en référence aux dessins annexés, dans lesquels :

  • la Figure 1 représente schématiquement une vue en perspective d'une partie d'un rotor au niveau d'un logement dont le battoir est retiré ;
  • la Figure 2 représente schématiquement une vue en perspective d'un battoir ;
  • la Figure 3 représente schématiquement une vue axiale d'un battoir fixé dans son logement et
  • la Figure 4 représente schématiquement une vue en perspective d'un bloc de fixation du battoir.
Other features and characteristics of the invention will emerge from the description of a preferred embodiment, presented below, by way of illustration, with reference to the accompanying drawings, in which:
  • Figure 1 schematically shows a perspective view of part of a rotor at a housing from which the beater is removed;
  • Figure 2 schematically shows a perspective view of a beater;
  • FIG. 3 schematically represents an axial view of a beater fixed in its housing and
  • Figure 4 schematically shows a perspective view of a block for fixing the beater.

Le rotor représenté sur la Figure 1 est constitué essentiellement d'une série de disques 10 qui sont fixés sur un axe central non représenté, actionné par un moteur approprié pour faire tourner l'ensemble des disques. Chacun des disques 10 comporte, à sa périphérie, une série d'évidements ou logements 12 alignés longitudinalement les uns sur les autres. Dans chaque rangée de logement 12 est disposé un battoir 14 tel que représenté sur la Figure 2 qui est destiné à percuter la matière à concasser lors de la rotation du rotor.The rotor shown in Figure 1 consists essentially of a series of discs 10 which are fixed on a central axis not shown, actuated by a suitable motor to rotate the set of discs. Each of the discs 10 has, at its periphery, a series of recesses or housings 12 aligned longitudinally one on the other. In each row of housing 12 is disposed a beater 14 as shown in Figure 2 which is intended to strike the material to be crushed during the rotation of the rotor.

Comme le montre la Figure 2, chaque battoir 14 a une forme symétrique par rapport à un plan radial du rotor, avec deux faces d'attaque symétriques 16 et 18, ce qui permet au battoir 14, en cas d'usure, par exemple de la face 16, d'être retourné pour travailler avec la face 18. Dans la région médiane, entre ces deux faces d'attaque 16 et 18, le battoir possède deux faces opposées planes 20, 22, les bords d'attaque 16 et 18 étant légèrement inclinés par rapport aux faces 20, 22 de manière à conférer au battoir une section en forme de "S" étiré.As shown in Figure 2, each beater 14 has a symmetrical shape relative to a radial plane of the rotor, with two symmetrical attack faces 16 and 18, which allows the beater 14, in case of wear, for example face 16, to be turned over to work with face 18. In the middle region, between these two attack faces 16 and 18, the beater has two opposite flat faces 20, 22, the leading edges 16 and 18 being slightly inclined relative to the faces 20, 22 so as to give the beater a section in the form of an "S" stretched.

Sur chacun des deux flancs 20 et 22 de chaque battoir 14 sont prévus des points d'appui usinés, soit sous forme de plot isolé tel que représenté en 24, soit sous forme de languette allongée telle que représentée en 26, soit une combinaison des deux. Ces plots 24 ou languettes 26 forment des surfaces d'appui parfaitement planes sans nécessité de devoir usiner toute la surface des flancs 20 et 22.On each of the two sides 20 and 22 of each beater 14 are provided machined support points, either in the form of an isolated stud as shown in 24, or in the form of an elongated tongue as shown in 26, or a combination of the two . These studs 24 or tongues 26 form perfectly flat bearing surfaces without the need to have to machine the entire surface of the sides 20 and 22.

Comme le montre la Figure 1, les logements 12 des battoirs 14 sont garnis latéralement par des barres de répartition 28, 30 qui s'étendent sur toute la longueur du rotor et qui sont fixées, par exemple, par soudure sur les disques 10. Ces barres 28, 30 sont destinées à répartir les sollicitations résultant du serrage des battoirs 14 ainsi que celle des chocs, lors du travail, sur les disques 10 et l'ensemble du rotor.As shown in FIG. 1, the housings 12 of the beaters 14 are lined laterally by distribution bars 28, 30 which extend over the entire length of the rotor and which are fixed, for example, by welding on the discs 10. These bars 28, 30 are intended to distribute the stresses resulting from the tightening of the beaters 14 as well as that of the shocks, during work, on the discs 10 and the rotor assembly.

Comme il est essentiel d'avoir des surfaces d'appui intérieures parfaitement planes et pour éviter de devoir remplacer entièrement les barres 28 et 30 en cas d'usure, celles-ci sont recouvertes, du côté intérieur, par des barrettes d'usure 32 et 34 qui sont vissées sur les barres de répartition et qui servent de surfaces d'appui aux battoirs 14 et aux blocs de fixation de ceux-ci. Ces barrettes 32 et 34 qui reçoivent et transmettent les chocs et sollicitations aux barres de répartition 28 et 30 peuvent être remplacées aisément en cas d'usure.As it is essential to have perfectly flat interior bearing surfaces and to avoid having to completely replace the bars 28 and 30 in the event of wear, these are covered, on the interior side, by wear bars 32 and 34 which are screwed onto the distribution bars and which serve as bearing surfaces for the beaters 14 and the fixing blocks thereof. These bars 32 and 34 which receive and transmit shocks and stresses to the distribution bars 28 and 30 can be easily replaced in the event of wear.

L'une des barres de répartition, dans l'exemple représenté, la barre 28, est associée à des moyens de positionnement axial et radial d'un battoir 14. Ces moyens sont constitués par deux plots cylindriques 36 qui sont engagés dans des logements semi-cylindriques correspondant aux deux extrémités de la barre 28 et de sa barrette d'usure 32. Ces plots 36 comportent, par ailleurs, chacun, une tête élargie 38, respectivement fixée par exemple à l'aide de vis 40 sur les côtés opposés de la barre 28.One of the distribution bars, in the example shown, the bar 28, is associated with means for axial and radial positioning of a beater 14. These means consist of two cylindrical studs 36 which are engaged in semi-housings -cylindrical corresponding to the two ends of the bar 28 and its wear bar 32. These studs 36 also comprise, each, an enlarged head 38, respectively fixed for example by means of screws 40 on the opposite sides of the bar 28.

Le battoir 14, quant à lui, comporte (voir Fig. 2), sur chacun de ses flancs 20 et 22 et à chacune de ses extrémités, également des logements semi-cylindriques 42, complémentaires aux plots 36 et des logements semi-cylindriques 44 élargis, complémentaires à leur tête 38 pour recevoir celle-ci (voir également Figure 3). La position radiale du battoir 14 par rapport à la barre 28 est donc parfaitement déterminée grâce à ces plots 36 et leur tête 38 ainsi que leurs logements dans la barre 28 et dans le battoir 14. La tête élargie 38 des plots 36 détermine, en outre, la position axiale du battoir par rapport au rotor. Ce positionnement radial et axial offre une grande facilité lors du montage du battoir et constitue une sécurité contre un dégagement éventuel sous l'effet de la force centrifuge lors du fonctionne-ment.The beater 14, for its part, comprises (see FIG. 2), on each of its sides 20 and 22 and at each of its ends, also semi-cylindrical housings 42, complementary to the studs 36 and semi-cylindrical housings 44 enlarged, complementary to their head 38 to receive it (see also Figure 3). The radial position of the beater 14 relative to the bar 28 is therefore perfectly determined thanks to these studs 36 and their head 38 as well as their housings in the bar 28 and in the beater 14. The enlarged head 38 of the studs 36 also determines , the axial position of the beater relative to the rotor. This radial and axial positioning offers great ease during assembly of the beater and constitutes a security against possible release under the effect of centrifugal force during operation.

Du côté opposé au positionnement radial et axial, le battoir 14 est associé à un système de fixation et de serrage tangentiel (voir Figure 3). Dans l'exemple représenté, le rotor et le battoir sont conçus pour tourner dans le sens des aiguilles d'une montre, c'est-à-dire que les moyens de positionnement du battoir se trouvent, vus dans le sens de rotation, derrière le battoir 14 et les moyens de fixation devant. Quoique cet arrangement mérite la préférence en raison de la grande surface d'appui et d'absorption des chocs assurée par la barre de répartition 28 derrière le battoir 14, il est possible d'inverser le système en prévoyant le positionnement devant le battoir 14 et la fixation derrière.On the side opposite to the radial and axial positioning, the beater 14 is associated with a tangential fixing and clamping system (see Figure 3). In the example shown, the rotor and the beater are designed to turn in a clockwise direction, that is to say that the means for positioning the beater are, seen in the direction of rotation, behind the beater 14 and the fixing means in front. Although this arrangement deserves preference because of the large bearing and shock absorption surface provided by the distribution bar 28 behind the beater 14, it is possible to reverse the system by providing for positioning in front of the beater 14 and the fixing behind.

La fixation est assurée par une série de blocs de fixation 50 (voir Figure 1), l'un d'entre eux étant représenté en perspective sur la Figure 4. Le nombre de ces blocs 50 est variable, notamment en fonction de l'application qui peut être adaptée suivant les besoins. Plus il y aura de blocs de fixation, meilleures seront la fixation et la liaison entre le battoir 14 et le rotor. En revanche, le montage et le démontage d'un battoir seront d'autant plus rapides qu'il y aura moins de blocs de fixation 50.The fixing is ensured by a series of fixing blocks 50 (see Figure 1), one of them being shown in perspective in Figure 4. The number of these blocks 50 is variable, in particular depending on the application which can be adapted as required. The more fixing blocks there are, the better the fixing and the connection between the beater 14 and the rotor. On the other hand, the assembly and disassembly of a beater will be all the faster when there are fewer fixing blocks 50.

Comme on peut le voir sur la Figure 1, les différents blocs 50 sont engagés par glissement dans une gorge longitudinale 52 à section rectangulaire dans la barre de répartition 30 et chaque bloc 50 comporte, à cet effet, sur la face arrière, un patin 54 de section complémentaire à celle de la gorge 52. Sur la face avant de chaque bloc 50 (voir Figure 4) se trouve une glissière 56 inclinée par rapport à un plan diamétral du rotor de manière que, lorsque les blocs 50 sont en place, la glissière soit, du côté extérieur des logements 12, plus près du battoir 14 que du côté intérieur.As can be seen in FIG. 1, the different blocks 50 are engaged by sliding in a longitudinal groove 52 of rectangular section in the distribution bar 30 and each block 50 comprises, for this purpose, on the rear face, a pad 54 of section complementary to that of the groove 52. On the front face of each block 50 (see FIG. 4) is a slide 56 inclined with respect to a diametrical plane of the rotor so that, when the blocks 50 are in place, the slide is, on the outside of the housings 12, closer to the beater 14 than on the inside.

Dans la glissière 56 est engagé un coin de serrage 58 avec une face avant plane 60 et une face arrière 62 (voir Figure 3) qui possède, par rapport à la face plane 60, la même inclinaison que la glissière 56. Par conséquent, lorsque le coin 58 coulisse dans la glissière 56, sa face avant 60 subit une translation parallèle à elle-même avec une composante tangentielle par rapport aux battoirs 14.In the slide 56 is engaged a clamping wedge 58 with a flat front face 60 and a rear face 62 (see Figure 3) which has, relative to the flat face 60, the same inclination as the slide 56. Consequently, when the corner 58 slides in the slide 56, its front face 60 undergoes a translation parallel to itself with a tangential component relative to the beaters 14.

Pour que le bloc 50 et le coin 58 restent imbriqués l'un dans l'autre, notamment lors du montage et du démontage, la glissière 56 possède, dans l'exemple présenté, des bords latéraux inclinés et rentrant 56a, 56b donnant à la glissière une section en queue d'aronde, tandis que le coin 58 possède des bords latéraux longitudinaux 58a à inclinaison sortante correspondante. D'autres formes, telles que tête de marteau ou autre, sont possible pour empêcher le déboîtement latéral de ces deux pièces.So that the block 50 and the corner 58 remain nested one inside the other, in particular during assembly and disassembly, the slide 56 has, in the example presented, inclined and re-entrant lateral edges 56a, 56b giving the slide a dovetail section, while the corner 58 has longitudinal lateral edges 58a with corresponding outward inclination. Other shapes, such as hammer head or other, are possible to prevent the lateral dislocation of these two parts.

La base du coin 58 est engagée par coulissement transversal dans un sabot 62 qui peut être relié au bloc 50 à l'aide de boulons de serrage 64, 66. En serrant ces deux boulons, le sabot 62 fait glisser le coin 60 dans la glissière 56 qui, à son tour, impose au coin 58 une composante de mouvement transversal dans le sens tangentiel du rotor. Étant donné que le sabot doit rester aligné sur le bloc 50 à cause des boulons 64, 66, le glissement du coin 60 dans le bloc 50 engendre également un mouvement de glissement transversal relatif entre le coin 58 et le sabot 62. Pour faciliter le glissement, il est possible d'incliner la base du coin 58 et sa surface de contact sur le sabot 62 dans le sens contraire de la glissière 56 afin que le mouvement relatif entre le coin 58 et le sabot 62 ne soit pas perpendiculaire à la force qu'il engendre, c'est-à-dire celle engendrée par le serrage des boulons 64 et 66.The base of the corner 58 is engaged by transverse sliding in a shoe 62 which can be connected to the block 50 using tightening bolts 64, 66. By tightening these two bolts, the shoe 62 makes the corner 60 slide in the slide 56 which, in turn, imposes on the corner 58 a component of transverse movement in the tangential direction of the rotor. Since the shoe must remain aligned with the block 50 because of the bolts 64, 66, the sliding of the corner 60 in the block 50 also generates a relative transverse sliding movement between the corner 58 and the shoe 62. To facilitate the sliding , it is possible to tilt the base of the corner 58 and its contact surface on the shoe 62 in the opposite direction to the slide 56 so that the relative movement between the corner 58 and the shoe 62 is not perpendicular to the force it generates, that is to say that generated by the tightening of bolts 64 and 66.

Pour le montage d'un battoir 14, on tourne le rotor dans une positionnement angulaire déterminée, par exemple, de manière à ce que le logement du battoir soit orienté à neuf heures. On met ensuite en place les plots de positionnement 36 que l'on fait tenir par leurs vis de fixation 40. Le battoir 14 peut ensuite être engagé radialement dans son logement et être déposé sur la barrette d'usure 32, tandis que le positionnement correct est réalisé par le serrage des vis 40 des plots de positionnement. Sur le côté supérieur du battoir 14 sont ensuite enfilés un nombre voulu de blocs de fixation 50, à l'état desserré, dans la gorge 52 de la barre 30 et positionnés correctement, de préférence régulièrement dans le sens longitudinal. On procède ensuite au serrage des boulons 64 et 66 de chacun des blocs 50, ce qui provoque le coulissement des coins 58 dans la glissière 56 et un mouvement de serrage tangentiel en direction du battoir 14 sur les languettes 26 ou plots usinés 24 de celui-ci. Après un serrage suffisant de tous les blocs 50, le battoir 14 se trouve solidement ancré dans son logement avec une liaison rigide et uniforme sur toute la longueur avec le rotor.For mounting a beater 14, the rotor is rotated in a determined angular position, for example, so that the housing of the beater is oriented at nine o'clock. The positioning pads 36 are then put in place which are made to hold by their fixing screws 40. The beater 14 can then be engaged radially in its housing and be deposited on the wear bar 32, while the correct positioning is achieved by tightening the screws 40 of the positioning pads. On the upper side of the beater 14 are then threaded a desired number of fixing blocks 50, in the loose state, into the groove 52 of the bar 30 and positioned correctly, preferably regularly in the longitudinal direction. Next, the bolts 64 and 66 of each of the blocks 50 are tightened, which causes the corners 58 to slide in the slide 56 and a tangential tightening movement in the direction of the beater 14 on the tabs 26 or machined studs 24 thereof. this. After sufficient tightening of all the blocks 50, the beater 14 is firmly anchored in its housing with a rigid and uniform connection over the entire length with the rotor.

Le démontage d'un battoir se fait selon le même scénario dans l'ordre inverse. Après le desserrage des boulons 64 et 66 des blocs 50, il peut toutefois être nécessaire de débloquer les coins 58 par des coups de marteau sur leur tête. En cas d'encrassement important, il est toujours possible de sectionner les boulons entre les sabots 62 et les blocs 50.The disassembly of a beater is done according to the same scenario in reverse order. After the bolts 64 and 66 of the blocks 50 have been loosened, it may however be necessary to unlock the corners 58 by hammer blows on their heads. In the event of significant fouling, it is always possible to cut the bolts between the shoes 62 and the blocks 50.

Il reste finalement à relever que les blocs de fixation 50 offrent l'avantage d'un accès facile des boulons 64 et 66 en vue du serrage ou du desserrage.It finally remains to be noted that the fixing blocks 50 offer the advantage of easy access of the bolts 64 and 66 for tightening or loosening.

Claims (8)

Rotor pour concasseur à percussion comprenant une série de disques (10) fixés sur un axe de rotation, une série de battoirs longitudinaux symétriques (14), radialement en saillie par rapport aux disques (10) et disposés dans des logements périphériques ouverts et alignés (12) des disques (10) et un système de fixation pour maintenir les battoirs (14), de manière amovible, dans leur logement (12), caractérisé en ce que le système de fixation comporte deux barres de répartition (28, 30) disposées dans lesdits logements (12) de part et d'autre de chaque battoir (14) et s'étendant sur toute la longueur du battoir (14), en ce que l'une des barres (28) est associée à un système de positionnement axial et radial d'un battoir (14) et en ce que la barre opposée (30) comporte une gorge longitudinale (52) dans laquelle sont introduits par glissement une série de blocs de fixation (50) à serrage progressif au moyen de coins de serrage (58) qui sont déplaçables dans une direction ayant une composante radiale et une composante tangentielle par rapport à un plan diamétral du rotor.Rotor for an impact crusher comprising a series of discs (10) fixed on an axis of rotation, a series of symmetrical longitudinal beaters (14), radially projecting from the discs (10) and arranged in open and aligned peripheral housings ( 12) discs (10) and a fixing system to hold the beaters (14) removably in their housing (12), characterized in that the fixing system comprises two distribution bars (28, 30) arranged in said housings (12) on either side of each beater (14) and extending over the entire length of the beater (14), in that one of the bars (28) is associated with a positioning system axial and radial of a beater (14) and in that the opposite bar (30) has a longitudinal groove (52) into which are inserted by sliding a series of fixing blocks (50) with progressive tightening by means of wedges clamps (58) which can be moved in one direction ection having a radial component and a tangential component with respect to a diametral plane of the rotor. Rotor selon la revendication 1, caractérisé en ce que la face intérieure de chaque barre de répartition (28, 30) est recouverte d'une barrette d'usure amovible (32, 34).Rotor according to claim 1, characterized in that the inner face of each distribution bar (28, 30) is covered with a removable wear bar (32, 34). Rotor selon la revendication 1, caractérisé en ce que le système de positionnement axial et radial est constitué de deux plots cylindriques (36) vissés aux deux extrémités opposées de la barre (28) et s'étendant longitudinalement dans des logements opposés correspondants de la barre (28) et du battoir (14).Rotor according to claim 1, characterized in that the axial and radial positioning system consists of two cylindrical studs (36) screwed to the two opposite ends of the bar (28) and extending longitudinally in corresponding opposite housings of the bar (28) and the beater (14). Rotor selon la revendication 1, caractérisé en ce que chaque bloc de fixation (50) comporte, du côté extérieur, un patin (54) de section complémentaire à la gorge (52) de la barre (30) dans laquelle il est engagé et, du côté intérieur, une glissière inclinée (56) dans laquelle est imbriquée, de manière coulissante, une face inclinée du coin de serrage (58) dont la face opposée (60) est plane et dont la base est engagée, de manière coulissante, dans un sabot (62) qui est relié à l'aide de vis de serrage (64, 66) aux blocs de fixation (50) .Rotor according to claim 1, characterized in that each fixing block (50) comprises, on the outside, a shoe (54) of complementary section to the groove (52) of the bar (30) in which it is engaged and, on the inside, an inclined slide (56) in which is slidably nested an inclined face of the clamping wedge (58) whose opposite face (60) is planar and whose base is engaged so sliding, in a shoe (62) which is connected by means of clamping screws (64, 66) to the fixing blocks (50). Rotor selon la revendication 4, caractérisé en ce que la glissière (56) du bloc de fixation (50) comporte une section en queue d'aronde et le coin de serrage (58) des bords latéraux (58a) biseautés de façon complémentaire.Rotor according to claim 4, characterized in that the slide (56) of the fixing block (50) has a dovetail section and the clamping corner (58) of the side edges (58a) bevelled in a complementary manner. Rotor selon l'une quelconque des revendications 1 à 5, caractérisé en ce que chaque battoir (14) comporte, dans la région médiane, deux faces opposées planes (20, 22) qui sont pourvues de languettes (26) ou plots (24) usinés servant d'appuis, d'un côté, aux faces planes (60) des coins de serrage (58) et, de l'autre côté, à la barre de répartition (28) et sa barrette d'usure (32).Rotor according to any one of Claims 1 to 5, characterized in that each beater (14) has, in the central region, two opposite flat faces (20, 22) which are provided with tongues (26) or studs (24) machined serving as supports, on one side, to the flat faces (60) of the clamping corners (58) and, on the other side, to the distribution bar (28) and its wear bar (32). Rotor selon l'une quelconque des revendications 1 à 6 caractérisé en ce que les blocs de fixation (50) se trouvent à l'avant du battoir (14) vu dans le sens de la rotation.Rotor according to any one of Claims 1 to 6, characterized in that the fixing blocks (50) are located at the front of the beater (14) seen in the direction of rotation. Rotor selon l'une quelconque des revendications 1 à 6 caractérisé en ce que les blocs de fixation (50) se trouvent à l'arrière du battoir (14) vu dans le sens de la rotation.Rotor according to any one of Claims 1 to 6, characterized in that the fixing blocks (50) are located at the rear of the beater (14) seen in the direction of rotation.
EP97200174A 1996-02-02 1997-01-21 Rotor for impact crusher Withdrawn EP0787529A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9600094A BE1009998A3 (en) 1996-02-02 1996-02-02 Rotor for a crusher percussion.
BE9600094 1996-02-02

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EP0787529A1 true EP0787529A1 (en) 1997-08-06

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JP (1) JPH09323045A (en)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017127679A1 (en) * 2017-11-23 2019-05-23 Keestrack N.V. rasp bar
CN111408446A (en) * 2020-04-18 2020-07-14 台州市久鼎金属贸易有限公司 Rotor assembly adopting integral hammer body
US11446674B2 (en) 2017-11-23 2022-09-20 Keestrack N.V. Blow bar

Citations (6)

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Publication number Priority date Publication date Assignee Title
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR2340771A1 (en) * 1976-02-14 1977-09-09 Hazemag Andreas Kg PERCUSSION BAR FOR IMPACT CRUSHER ROTORS
EP0209757A2 (en) * 1985-07-17 1987-01-28 Hermann Schrödl Impact bar for an impact crusher rotor
US4821970A (en) * 1988-05-13 1989-04-18 Telsmith, Inc. Impact crusher
US5004169A (en) * 1989-11-22 1991-04-02 Cedarapids, Inc. Impeller bar assembly with adjustable locking mechanism
EP0666111A1 (en) * 1994-02-04 1995-08-09 Magotteaux International S.A. Rotor for impact crusher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR2340771A1 (en) * 1976-02-14 1977-09-09 Hazemag Andreas Kg PERCUSSION BAR FOR IMPACT CRUSHER ROTORS
EP0209757A2 (en) * 1985-07-17 1987-01-28 Hermann Schrödl Impact bar for an impact crusher rotor
US4821970A (en) * 1988-05-13 1989-04-18 Telsmith, Inc. Impact crusher
US5004169A (en) * 1989-11-22 1991-04-02 Cedarapids, Inc. Impeller bar assembly with adjustable locking mechanism
EP0666111A1 (en) * 1994-02-04 1995-08-09 Magotteaux International S.A. Rotor for impact crusher

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017127679A1 (en) * 2017-11-23 2019-05-23 Keestrack N.V. rasp bar
DE102017127679B4 (en) 2017-11-23 2020-04-23 Keestrack N.V. Blow bar
US11446674B2 (en) 2017-11-23 2022-09-20 Keestrack N.V. Blow bar
CN111408446A (en) * 2020-04-18 2020-07-14 台州市久鼎金属贸易有限公司 Rotor assembly adopting integral hammer body

Also Published As

Publication number Publication date
BE1009998A3 (en) 1997-11-04
JPH09323045A (en) 1997-12-16

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