EP1009529A1 - Improvements to crushers with ring-shaped track and roller - Google Patents

Improvements to crushers with ring-shaped track and roller

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Publication number
EP1009529A1
EP1009529A1 EP97918239A EP97918239A EP1009529A1 EP 1009529 A1 EP1009529 A1 EP 1009529A1 EP 97918239 A EP97918239 A EP 97918239A EP 97918239 A EP97918239 A EP 97918239A EP 1009529 A1 EP1009529 A1 EP 1009529A1
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EP
European Patent Office
Prior art keywords
track
roller
edge
distance
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.)
Granted
Application number
EP97918239A
Other languages
German (de)
French (fr)
Other versions
EP1009529B1 (en
Inventor
Philippe Chevalier
Alain Cordonnier
Philippe Lagache
Christophe Obry
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FCB Ciment
Original Assignee
F C B
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Application filed by F C B filed Critical F C B
Publication of EP1009529A1 publication Critical patent/EP1009529A1/en
Application granted granted Critical
Publication of EP1009529B1 publication Critical patent/EP1009529B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/06—Mills with rollers forced against the interior of a rotary ring, e.g. under spring action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/003—Shape or construction of discs or rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls

Definitions

  • the present invention relates to shredders comprising an annular track with a horizontal axis, a roller capable of rolling on said track, means for pressing the roller on the track and means for moving the material from one edge to the other of the track. , so that it passes several times under the roller before being evacuated.
  • Rench Patent No. 91 09788 it has been proposed to give the roller and / or the track a profile such that the spacing between the roller and the track decreases progressively or by degrees from one edge of the track to the other.
  • the object of the present invention is to improve the efficiency of shredders of this type and to better distribute the mechanical stresses in the roller and the track.
  • the mill object of the present invention is characterized in that the spacing between the roller and the track decreases from the edge of the track located on the side of the supply of material to be ground up to a distance from this edge at least equal to 80% of the width of the track, and then grows faster to form a decompression zone on the side of the discharge of the ground material.
  • the track is constituted by a ring secured to a drum with a horizontal axis which forms a supply chamber on one side of the track and an evacuation chamber on the other side, and a dam annular is provided at the end of the evacuation chamber opposite to that adjacent to the track to maintain in said chamber a layer of crushed material whose thickness is such that it practically reaches the edge of the roller in the plane of the edge adjacent to the runway.
  • the axial extent of the decompression zone, counted from the edge of the track located on the side of the discharge of the material, is between 2% and 20%, preferably 5% to 15%, of the width of the track, and in this zone the angle formed by the track and the peripheral surface of the roller, in the plane containing the axes of the track and the roller, is less than 50 °.
  • the track is cylindrical and the roller is formed of at least two frustoconical parts, a first part whose diameter increases from its end located on the feed side up to a distance from this end at least equal to 80% of the axial length of the roll, and a second part of decreasing diameter located at its other end.
  • the track may have a frustoconical profile with a diameter which decreases from its edge situated on the side of the supply of material to be ground up to the decompression zone and a constant or variable angle at the top; in the decompression zone, the diameter of the track increases in the direction of progression of the material.
  • a cylindrical roller whose axis will be parallel to the axis of the track or will make an angle less than 5 ° with it.
  • Figure 1 is a vertical section of a crusher produced in accordance with the invention.
  • Figure 2 is a section through a plane perpendicular to the axis of the crusher of Figure 1;
  • FIGS. 3 and 4 illustrate two other embodiments of the invention.
  • the crusher shown in the drawings consists of a drum 10, with a horizontal axis, which is supported by shoes 12 allowing its rotation about its axis; these pads could be replaced by a bearing or rollers.
  • the drum is rotated by conventional means, not shown, for example by a motor and a reduction gear, the output shaft of which carries a pinion engaged with a toothed ring fixed on the drum.
  • the drum consists of a ferrule internally coated with wear plates which, in the central part, form an annular grinding track 14, with a cylindrical surface.
  • the interior of the drum is thus divided into a feed zone 11, a grinding zone 13 and a discharge zone 15.
  • Annular flanges 17 provided at the two ends of the shell form dams making it possible to maintain a layer of material in the feeding and evacuation areas.
  • This drum is closed at its two ends by sheets mounted on a fixed support and to which are connected a feed chute, at one end, a discharge chute and a suction duct for the pneumatic evacuation of fine particles, the other extremity.
  • a roller 16 is mounted inside the drum, so that it can roll on the track 14 when the drum is driven in rotation. More precisely, when the crusher is in operation, the roller rolls on the layer of material covering the track.
  • the roller is provided with two shaft ends mounted in bearings fixed to two levers arranged on the outside of the drums, on either side thereof. Hydropneumatic springs or cylinders acting on the bearings or on the levers make it possible to press the roller on the grinding track with a predetermined and adjustable force.
  • the roller 16 is made up of three frustoconical parts, with different conicities.
  • the two main parts 16a and 16b extend over approximately 80% of the length of the roller; their diameter increases in the direction of progression of the material on the track (direction of the arrow in FIG. 1) and the angle at the top of the part 16a, closest to the feeding zone, is greater than that of part 16b.
  • the part 16c located on the side of the evacuation zone, has a diameter which decreases in the direction of progression of the material and its angle at the top is clearly greater than that of the other two parts but less than 100 °; the axial length of this part is between 2% and 20%, preferably 5 and 15%, of the useful length of the roller.
  • decompression zone 19 which follows the zone of pressurization of the material between the roller and the track.
  • This decompression zone and the layer of material formed in the evacuation zone oppose the sudden ejection of the compressed material between the track and the roller, near the edge of the roller, (edge effect). This allows better control of the grinding in the area adjacent to the decompression area.
  • the decompression zone ensures better distribution of the mechanical stresses in the roller near its lateral face.
  • the thickness of the layer of material 20 formed in the discharge zone 15 is such that it practically reaches the edge of the roller in the plane of the edge of the track adjacent to this zone.
  • a device intended to ensure the step-by-step advance of the material, from one end to the other of the drum, is arranged in the upper half of the latter, on the descending part of the circular trajectory of the materials.
  • This device has been shown diagrammatically in FIG. 1 by a series of inclined blades 18 which detach from the wall of the drum and the track the material which is normally held there by centrifugal force. The detached material slides on the blades 18 and, because of their inclination is moved there from the inlet to the outlet of the mill.
  • the speed of advance of the material is adjusted; different speeds can be chosen for the feeding, grinding and evacuation zones.
  • the device for advancing the material could be of the type described in the aforementioned French patent No. 91.09788.
  • FIG 3 there is shown schematically another embodiment of the track and the roller.
  • the track is formed of three frustoconical surfaces 14a, 14b and 14c joined so that its diameter decreases, in the direction of progression of the material indicated by the arrow, over most of its width then grows rapidly in its last part.
  • the angle at the top of the surface 14a is greater than that of the surface 14b.
  • the surface 14c of the track and the roller define the decompression zone. In the plane of the figure, which contains the axes of the roller and the track, the angle formed by this part of the track and the roller is less than 50 °.
  • the surface of the roller 16 is cylindrical and its axis is parallel to that of the track.
  • the track has a first frustoconical part, with a decreasing diameter in the direction of progression of the material (arrow), and a second cylindrical part.
  • the roller is cylindrical and its axis is inclined relative to the axis of the track at an angle ⁇ of less than 5 °. It has at its end adjacent to the evacuation zone a frustoconical portion defining, with the track, a decompression zone.
  • Other shapes of the track and the roller can be chosen to obtain a decreasing spacing, in the direction of progression of the material, between the track and the roller, over most of the width of the track, and to provide an area decompression on the side of the evacuation zone; it is understood that all of these forms are within the scope of the invention. It is evident, moreover, that the invention also applies to shredders comprising several rollers on the same track or several tracks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Road Repair (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

PCT No. PCT/FR97/00682 Sec. 371 Date Nov. 2, 1999 Sec. 102(e) Date Nov. 2, 1999 PCT Filed Apr. 15, 1997 PCT Pub. No. WO98/46357 PCT Pub. Date Oct. 22, 1998A grinder having an annular track with a horizontal axis (14), a roller (16) capable of travelling over the track, a mechanism for pressing the roller against the track and means (18) for displacing the material from one edge of the track to the other in such a way that it passes several times beneath the roller before being evacuated. To enhance the efficiency of the grinder and the distribution of mechanical stresses in the roller and the track, the track (14) and the roller (16) are designed in such a way that the gap between them decreases from the edge of the track (14) located on the side for supplying the material to be ground to a distance from this edge at least equal to 80% of the width of the track, and in that this interval then swiftly increases to form a decompression area (19) on the ground material evacuation side.

Description

* Perfectionnements aux broyeurs à piste annulaire et rouleau . La présente invention concerne les broyeurs comportant une piste annulaire à axe horizontal, un rouleau apte à rouler sur ladite piste, des moyens pour presser le rouleau sur la piste et des moyens pour déplacer la matière d'un bord à l'autre de la piste, de telle sorte qu'elle passe plusieurs fois sous le rouleau avant d'être évacuée. Pour améliorer le broyage lorsque les matières à broyer ont une granulométrie hétérogène on a proposé (brevet français n° 91 09788) de donner au rouleau et/ou à la piste un profil tel que l'écartement entre le rouleau et la piste décroisse progressivement ou par degrés d'un bord à l'autre de la piste. * Improvements to grinders with annular track and roller. The present invention relates to shredders comprising an annular track with a horizontal axis, a roller capable of rolling on said track, means for pressing the roller on the track and means for moving the material from one edge to the other of the track. , so that it passes several times under the roller before being evacuated. To improve the grinding when the materials to be ground have a heterogeneous particle size, it has been proposed (French Patent No. 91 09788) to give the roller and / or the track a profile such that the spacing between the roller and the track decreases progressively or by degrees from one edge of the track to the other.
Le but de la présente invention est d'améliorer l'efficacité des broyeurs de ce type et de mieux répartir les contraintes mécaniques dans le rouleau et la piste.The object of the present invention is to improve the efficiency of shredders of this type and to better distribute the mechanical stresses in the roller and the track.
Le broyeur objet de la présente invention est caractérisé en ce que l'écartement entre le rouleau et la piste décroît depuis le bord de la piste situé du côté de l'alimentation en matière à broyer jusqu'à une distance de ce bord au moins égale à 80 % de la largeur de la piste, et croît ensuite plus rapidement pour former une zone de décompression du côté de l'évacuation de la matière broyée.The mill object of the present invention is characterized in that the spacing between the roller and the track decreases from the edge of the track located on the side of the supply of material to be ground up to a distance from this edge at least equal to 80% of the width of the track, and then grows faster to form a decompression zone on the side of the discharge of the ground material.
Suivant une forme de réalisation préférée, la piste est constituée par un anneau solidaire d'un tambour à axe horizontal qui forme une chambre d'alimentation sur un côté de la piste et une chambre d'évacuation sur l'autre côté, et un barrage annulaire est prévu à l'extrémité de la chambre d'évacuation opposée à celle attenante à la piste pour maintenir dans ladite chambre une couche de matière broyée dont l'épaisseur est telle qu'elle atteint pratiquement le bord du rouleau dans le plan du bord adjacent de la piste.According to a preferred embodiment, the track is constituted by a ring secured to a drum with a horizontal axis which forms a supply chamber on one side of the track and an evacuation chamber on the other side, and a dam annular is provided at the end of the evacuation chamber opposite to that adjacent to the track to maintain in said chamber a layer of crushed material whose thickness is such that it practically reaches the edge of the roller in the plane of the edge adjacent to the runway.
De préférence, l'étendue axiale de la zone de décompression, comptée à partir du bord de la piste située du côté de l'évacuation de la matière, est comprise entre 2 % et 20 %, de préférence 5 % à 15 %, de la largeur de la piste, et dans cette zone l'angle formé par la piste et la surface périphérique du rouleau, dans le plan contenant les axes de la piste et du rouleau, est inférieur à 50°.Preferably, the axial extent of the decompression zone, counted from the edge of the track located on the side of the discharge of the material, is between 2% and 20%, preferably 5% to 15%, of the width of the track, and in this zone the angle formed by the track and the peripheral surface of the roller, in the plane containing the axes of the track and the roller, is less than 50 °.
Suivant une forme de réalisation du broyeur, la piste est cylindrique et le rouleau est formé d'au moins deux parties tronconiques, une première partie dont le diamètre croit depuis son extrémité située côté alimentation jusqu'à une distance de cette extrémité au moins égale à 80 % de la longueur axiale du rouleau, et une seconde partie de diamètre décroissant située à son autre extrémité.According to one embodiment of the crusher, the track is cylindrical and the roller is formed of at least two frustoconical parts, a first part whose diameter increases from its end located on the feed side up to a distance from this end at least equal to 80% of the axial length of the roll, and a second part of decreasing diameter located at its other end.
En variante, la piste peut avoir un profil tronconique avec un diamètre qui décroît depuis son bord situé du côté de l'alimentation en matière à broyer jusqu'à la zone de décompression et un angle au sommet constant ou variable ; dans la zone de décompression, le diamètre de la piste croît dans le sens de progression de la matière. Avec une telle piste, on pourra utiliser un rouleau cylindrique dont l'axe sera parallèle à l'axe de la piste ou fera un angle inférieur à 5 ° avec celui-ci.As a variant, the track may have a frustoconical profile with a diameter which decreases from its edge situated on the side of the supply of material to be ground up to the decompression zone and a constant or variable angle at the top; in the decompression zone, the diameter of the track increases in the direction of progression of the material. With such a track, we can use a cylindrical roller whose axis will be parallel to the axis of the track or will make an angle less than 5 ° with it.
La description qui "suit se réfère aux dessins l'accompagnant qui montrent, à titre d'exemples non limitatifs, plusieurs formes de réalisation de l'invention et sur lesquels :The description which " follows refers to the accompanying drawings which show, by way of nonlimiting examples, several embodiments of the invention and in which:
La figure 1 est une coupe verticale d'un broyeur réalisé conformément à l'invention ;Figure 1 is a vertical section of a crusher produced in accordance with the invention;
La figure 2 est une coupe, par un plan perpendiculaire à l'axe, du broyeur de la figure 1 ; etFigure 2 is a section through a plane perpendicular to the axis of the crusher of Figure 1; and
Les figures 3 et 4 illustrent deux autres formes de réalisation de l'invention. Le broyeur représenté sur les dessins est constitué par un tambour 10, à axe horizontal, qui est supporté par des patins 12 permettant sa rotation autour de son axe ; ces patins pourraient être remplacés par un coussinet ou des galets. Le tambour est entraîné en rotation par des moyens classiques, non représentés, par exemple par un moteur et un réducteur dont l'arbre de sortie porte un pignon en prise avec une couronne dentée fixée sur le tambour. Le tambour est constitué par une virole revêtue intérieurement de plaques d'usure qui, dans la partie centrale, forment une piste de broyage annulaire 14, à surface cylindrique.Figures 3 and 4 illustrate two other embodiments of the invention. The crusher shown in the drawings consists of a drum 10, with a horizontal axis, which is supported by shoes 12 allowing its rotation about its axis; these pads could be replaced by a bearing or rollers. The drum is rotated by conventional means, not shown, for example by a motor and a reduction gear, the output shaft of which carries a pinion engaged with a toothed ring fixed on the drum. The drum consists of a ferrule internally coated with wear plates which, in the central part, form an annular grinding track 14, with a cylindrical surface.
L'intérieur du tambour est ainsi divisé en une zone d'alimentation 11, une zone de broyage 13 et une zone d'évacuation 15. Des rebords annulaires 17 prévus aux deux extrémités de la virole forment des barrages permettant de maintenir une couche de matière dans les zones d'alimentation et d'évacuation. Ce tambour est fermé à ses deux extrémités par des tôles montées sur un support fixe et auxquelles sont raccordées une goulotte d'alimentation, à une extrémité, une goulotte de décharge et un conduit d'aspiration pour l'évacuation pneumatique des particules fines, à l'autre extrémité.The interior of the drum is thus divided into a feed zone 11, a grinding zone 13 and a discharge zone 15. Annular flanges 17 provided at the two ends of the shell form dams making it possible to maintain a layer of material in the feeding and evacuation areas. This drum is closed at its two ends by sheets mounted on a fixed support and to which are connected a feed chute, at one end, a discharge chute and a suction duct for the pneumatic evacuation of fine particles, the other extremity.
Un rouleau 16 est monté à l'intérieur du tambour, de façon à pouvoir rouler sur la piste 14 lorsque le tambour est entraîné en rotation. Plus précisément, lorsque le broyeur est en fonctionnement, le rouleau roule sur la couche de matière recouvrant la piste. Le rouleau est muni de deux bouts d'arbre montés dans des paliers fixés à deux leviers disposés à l'extérieur des tambours, de part et d'autre de celui-ci. Des ressorts ou des vérins hydropneumatiques agissant sur les paliers ou sur les leviers permettent de presser le rouleau sur la piste de broyage avec une force prédéterminée et réglable.A roller 16 is mounted inside the drum, so that it can roll on the track 14 when the drum is driven in rotation. More precisely, when the crusher is in operation, the roller rolls on the layer of material covering the track. The roller is provided with two shaft ends mounted in bearings fixed to two levers arranged on the outside of the drums, on either side thereof. Hydropneumatic springs or cylinders acting on the bearings or on the levers make it possible to press the roller on the grinding track with a predetermined and adjustable force.
Le rouleau 16 se compose de trois parties tronconiques, de conicités différentes. Les deux parties principales 16a et 16b s'étendent sur environ 80 % de la longueur du rouleau ; leur diamètre croit dans le sens de progression de la matière sur la piste (sens de la flèche sur la figure 1) et l'angle au sommet de la partie 16a, la plus proche de la zone d'alimentation, est supérieur à celui de la partie 16b. La partie 16c, située du côté de la zone d'évacuation, a un diamètre qui décroît dans le sens de progression de la matière et son angle au sommet est nettement supérieur à celui des deux autres parties mais inférieur à 100° ; la longueur axiale de cette partie est comprise entre 2 % et 20 %, de préférence 5 et 15 %, de la longueur utile du rouleau. Elle délimite avec la piste une zone de décompression 19 qui fait suite à la zone de mise en pression de la matière entre le rouleau et la piste. Cette zone de décompression et la couche de matière 20 formée dans la zone d'évacuation s'opposent à l'éjection brutale de la matière comprimée entre la piste et le rouleau, près du bord du rouleau, (effet de bord). Cela permet de mieux contrôler le broyage dans la zone adjacente à la zone de décompression. En outre, la zone de décompression permet d'assurer une meilleure répartition des contraintes mécaniques dans le rouleau près de sa face latérale. L'épaisseur de la couche de matière 20 formée dans la zone d'évacuation 15 est telle qu'elle atteint pratiquement le bord du rouleau dans le plan du bord de la piste adjacent à cette zone.The roller 16 is made up of three frustoconical parts, with different conicities. The two main parts 16a and 16b extend over approximately 80% of the length of the roller; their diameter increases in the direction of progression of the material on the track (direction of the arrow in FIG. 1) and the angle at the top of the part 16a, closest to the feeding zone, is greater than that of part 16b. The part 16c, located on the side of the evacuation zone, has a diameter which decreases in the direction of progression of the material and its angle at the top is clearly greater than that of the other two parts but less than 100 °; the axial length of this part is between 2% and 20%, preferably 5 and 15%, of the useful length of the roller. It defines with the track a decompression zone 19 which follows the zone of pressurization of the material between the roller and the track. This decompression zone and the layer of material formed in the evacuation zone oppose the sudden ejection of the compressed material between the track and the roller, near the edge of the roller, (edge effect). This allows better control of the grinding in the area adjacent to the decompression area. In addition, the decompression zone ensures better distribution of the mechanical stresses in the roller near its lateral face. The thickness of the layer of material 20 formed in the discharge zone 15 is such that it practically reaches the edge of the roller in the plane of the edge of the track adjacent to this zone.
Un dispositif destiné à assurer l'avance pas à pas de la matière, d'une extrémité à l'autre du tambour, est disposé dans la moitié supérieure de ce dernier, sur la partie descendante de la trajectoire circulaire des matières. Ce dispositif a été schématisé sur la figure 1 par une série de lames inclinées 18 qui détachent de la paroi du tambour et de la piste la matière qui y est normalement maintenue par la force centrifuge. La matière détachée glisse sur les lames 18 et, du fait de leur inclinaison y est déplacée de l'entrée vers la sortie du broyeur. En réglant l'inclinaison des lames 18 on règle la vitesse d'avance de la matière ; des vitesses différentes peuvent être choisies pour les zones d'alimentation, de broyage et d'évacuation. En variante, le dispositif d'avance de la matière pourrait être du type décrit dans le brevet français n° 91.09788 précité.A device intended to ensure the step-by-step advance of the material, from one end to the other of the drum, is arranged in the upper half of the latter, on the descending part of the circular trajectory of the materials. This device has been shown diagrammatically in FIG. 1 by a series of inclined blades 18 which detach from the wall of the drum and the track the material which is normally held there by centrifugal force. The detached material slides on the blades 18 and, because of their inclination is moved there from the inlet to the outlet of the mill. By adjusting the inclination of the blades 18, the speed of advance of the material is adjusted; different speeds can be chosen for the feeding, grinding and evacuation zones. As a variant, the device for advancing the material could be of the type described in the aforementioned French patent No. 91.09788.
Sur la figure 3, on a représenté schématiquement une autre forme de réalisation de la piste et du rouleau. Au lieu d'être cylindrique, la piste est formée de trois surfaces tronconiques 14a, 14b et 14c accolées de telle sorte que son diamètre décroît, dans le sens de progression de la matière indiqué par la flèche, sur la majeure partie de sa largeur puis croît rapidement dans sa dernière partie. L'angle au sommet de la surface 14a est plus grand que celui de la surface 14b. La surface 14c de la piste et le rouleau définissent la zone de décompression. Dans le plan de la figure, qui contient les axes du rouleau et de la piste, l'angle que forment cette partie de la piste et le rouleau est inférieur à 50°. La surface du rouleau 16 est cylindrique et son axe est parallèle à celui de la piste.In Figure 3, there is shown schematically another embodiment of the track and the roller. Instead of being cylindrical, the track is formed of three frustoconical surfaces 14a, 14b and 14c joined so that its diameter decreases, in the direction of progression of the material indicated by the arrow, over most of its width then grows rapidly in its last part. The angle at the top of the surface 14a is greater than that of the surface 14b. The surface 14c of the track and the roller define the decompression zone. In the plane of the figure, which contains the axes of the roller and the track, the angle formed by this part of the track and the roller is less than 50 °. The surface of the roller 16 is cylindrical and its axis is parallel to that of the track.
Dans la forme de réalisation représentée sur la figure 4, la piste comporte une première partie tronconique, à diamètre décroissant dans le sens de progression de la matière (flèche), et une seconde partie cylindrique. Le rouleau est cylindrique et son axe est incliné par rapport à l'axe de la piste d'un angle β compris inférieur à 5°. Il comporte à son extrémité adjacente à la zone d'évacuation une portion tronconique définissant, avec la piste, une zone de décompression. D'autres formes de la piste et du rouleau peuvent être choisies pour obtenir un écartement décroissant, dans le sens de progression de la matière, entre la piste et le rouleau, sur la majeure partie de la largeur de la piste, et ménager une zone de décompression du côté de la zone d'évacuation ; il est bien entendu que toutes ces formes entrent dans le cadre de l'invention. Il est évident, par ailleurs, que l'invention s'applique aussi aux broyeurs comportant plusieurs rouleaux sur une même piste ou plusieurs pistes. In the embodiment shown in FIG. 4, the track has a first frustoconical part, with a decreasing diameter in the direction of progression of the material (arrow), and a second cylindrical part. The roller is cylindrical and its axis is inclined relative to the axis of the track at an angle β of less than 5 °. It has at its end adjacent to the evacuation zone a frustoconical portion defining, with the track, a decompression zone. Other shapes of the track and the roller can be chosen to obtain a decreasing spacing, in the direction of progression of the material, between the track and the roller, over most of the width of the track, and to provide an area decompression on the side of the evacuation zone; it is understood that all of these forms are within the scope of the invention. It is evident, moreover, that the invention also applies to shredders comprising several rollers on the same track or several tracks.

Claims

REVENDICATIONS
1. Broyeur comportant une piste annulaire à axe horizontal (14), un rouleau (16) apte à rouler sur ladite piste, des moyens pour presser le rouleau sur la piste et des moyens pour déplacer la matière d'un bord à l'autre de la piste de telle sorte qu'elle passe plusieurs fois sous le rouleau avant d'être évacuée, caractérisé en ce que l'écartement entre le rouleau (16) et la piste (14) décroît depuis le bord de la piste situé du côté de l'alimentation en matière à broyer jusqu'à une distance de ce bord au moins égale à 80 % de la largeur de la piste, et en ce que cet écart croît ensuite rapidement pour former une zone de décompression (19) du côté de l'évacuation de la matière broyée.1. Crusher comprising an annular track with horizontal axis (14), a roller (16) capable of rolling on said track, means for pressing the roller on the track and means for moving the material from one edge to the other of the track so that it passes several times under the roller before being evacuated, characterized in that the distance between the roller (16) and the track (14) decreases from the edge of the track located on the side of the supply of material to be ground up to a distance from this edge at least equal to 80% of the width of the track, and in that this gap then increases rapidly to form a decompression zone (19) on the side of the evacuation of the ground material.
2. Broyeur selon la revendication 1, caractérisé en ce que la piste (14) est constituée par un anneau solidaire d'un tambour coaxial (10) qui forme une chambre d'évacuation (15) sur un côté de la piste, et un barrage annulaire (17) est prévu à l'extrémité de la chambre d'évacuation la plus éloignée de la piste pour maintenir dans ladite chambre une couche de matière broyée dont l'épaisseur est telle qu'elle atteint pratiquement le bord du rouleau dans le plan du bord adjacent de la piste. 2. Crusher according to claim 1, characterized in that the track (14) is constituted by a ring secured to a coaxial drum (10) which forms a discharge chamber (15) on one side of the track, and a annular barrier (17) is provided at the end of the evacuation chamber furthest from the track to maintain in said chamber a layer of crushed material whose thickness is such that it practically reaches the edge of the roller in the plan of the adjacent edge of the runway.
3. Broyeur selon la revendication 1 ou 2, caractérisé en ce que, dans le plan contenant l'axe du rouleau et de la piste, l'angle ( ) formé par la piste et le rouleau dans la zone de décompression (19) est inférieur à 50°.3. Crusher according to claim 1 or 2, characterized in that, in the plane containing the axis of the roller and the track, the angle () formed by the track and the roller in the decompression zone (19) is less than 50 °.
4. Broyeur selon la revendication 1, 2 ou 3, caractérisé en ce que la piste (14) est cylindrique et le rouleau est formé d'au moins deux parties tronconiques, une première partie (16a, 16b) dont le diamètre croit depuis son extrémité située côté alimentation jusqu'à une distance de cette extrémité au moins égale à 80 % de la longueur axiale du rouleau, et une seconde partie (16c) de diamètre décroissant, située à son autre extrémité.4. Crusher according to claim 1, 2 or 3, characterized in that the track (14) is cylindrical and the roller is formed of at least two frustoconical parts, a first part (16a, 16b) whose diameter increases from its end situated on the feed side up to a distance from this end at least equal to 80% of the axial length of the roller, and a second part (16c) of decreasing diameter, situated at its other end.
5. Broyeur selon la revendication 1, 2, 3 ou 4, caractérisé en ce que la piste est formée d'au moins deux surfaces tronconiques, une première surface (14a, 14b) dont le diamètre décroît depuis son bord situé côté alimentation jusqu'à une distance de ce bord au moins égale à 80 % de la largeur de la piste, et une seconde surface (14c) de diamètre croissant, adjacente à son autre bord.5. Crusher according to claim 1, 2, 3 or 4, characterized in that the track is formed of at least two frustoconical surfaces, a first surface (14a, 14b) whose diameter decreases from its edge located on the supply side up to at a distance from this edge at least equal to 80% of the width of the track, and a second surface (14c) of increasing diameter, adjacent to its other edge.
6. Broyeur selon la revendication 1, 2, 3, 4 ou 5, caractérisé en ce que l'axe du rouleau est incliné par rapport à l'axe de la piste d'un angle (β) inférieur à 5°. 6. Crusher according to claim 1, 2, 3, 4 or 5, characterized in that the axis of the roller is inclined relative to the axis of the track with an angle (β) less than 5 °.
EP97918239A 1997-04-15 1997-04-15 Improvements to crushers with ring-shaped track and roller Expired - Lifetime EP1009529B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR1997/000682 WO1998046357A1 (en) 1997-04-15 1997-04-15 Improvements to crushers with ring-shaped track and roller

Publications (2)

Publication Number Publication Date
EP1009529A1 true EP1009529A1 (en) 2000-06-21
EP1009529B1 EP1009529B1 (en) 2003-06-25

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ID=9502902

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EP97918239A Expired - Lifetime EP1009529B1 (en) 1997-04-15 1997-04-15 Improvements to crushers with ring-shaped track and roller

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US (1) US6138933A (en)
EP (1) EP1009529B1 (en)
JP (1) JP3710829B2 (en)
AT (1) ATE243563T1 (en)
AU (1) AU2643997A (en)
CA (1) CA2285654C (en)
CZ (1) CZ295375B6 (en)
DE (1) DE69723115T2 (en)
DK (1) DK1009529T3 (en)
ES (1) ES2202603T3 (en)
PL (1) PL186892B1 (en)
SK (1) SK139199A3 (en)
UA (1) UA46143C2 (en)
WO (1) WO1998046357A1 (en)

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CN113333105A (en) * 2021-05-20 2021-09-03 萍乡市华顺环保化工填料有限公司 Grinding equipment is used in aluminium oxide production

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JP5859698B1 (en) * 2015-04-17 2016-02-10 三菱日立パワーシステムズ株式会社 Crushing roller and crushing device

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FR2679792B1 (en) * 1991-08-01 1995-08-25 Fcb IMPROVEMENTS ON RING SHREDDERS.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113333105A (en) * 2021-05-20 2021-09-03 萍乡市华顺环保化工填料有限公司 Grinding equipment is used in aluminium oxide production
CN113333105B (en) * 2021-05-20 2022-08-02 萍乡市华顺环保化工填料有限公司 Grinding equipment is used in aluminium oxide production

Also Published As

Publication number Publication date
DE69723115D1 (en) 2003-07-31
DE69723115T2 (en) 2004-04-29
JP3710829B2 (en) 2005-10-26
SK139199A3 (en) 2000-05-16
US6138933A (en) 2000-10-31
WO1998046357A1 (en) 1998-10-22
ES2202603T3 (en) 2004-04-01
CZ349299A3 (en) 2000-05-17
AU2643997A (en) 1998-11-11
EP1009529B1 (en) 2003-06-25
CA2285654A1 (en) 1998-10-22
CZ295375B6 (en) 2005-07-13
PL186892B1 (en) 2004-03-31
DK1009529T3 (en) 2003-09-29
CA2285654C (en) 2003-07-01
ATE243563T1 (en) 2003-07-15
JP2001518841A (en) 2001-10-16
PL336308A1 (en) 2000-06-19
UA46143C2 (en) 2002-05-15

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