EP0752273A1 - Vertical-shaft crusher - Google Patents

Vertical-shaft crusher Download PDF

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Publication number
EP0752273A1
EP0752273A1 EP96401485A EP96401485A EP0752273A1 EP 0752273 A1 EP0752273 A1 EP 0752273A1 EP 96401485 A EP96401485 A EP 96401485A EP 96401485 A EP96401485 A EP 96401485A EP 0752273 A1 EP0752273 A1 EP 0752273A1
Authority
EP
European Patent Office
Prior art keywords
grid
hammers
grille
vertical
cylindrical
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
EP96401485A
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German (de)
French (fr)
Other versions
EP0752273B1 (en
Inventor
Gérard Pierre Heurgue
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.)
HEURGUE CONSEIL SA
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Gérard Pierre Heurgue
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Filing date
Publication date
Application filed by Gérard Pierre Heurgue filed Critical Gérard Pierre Heurgue
Publication of EP0752273A1 publication Critical patent/EP0752273A1/en
Application granted granted Critical
Publication of EP0752273B1 publication Critical patent/EP0752273B1/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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • 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
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens

Definitions

  • the present invention relates to improvements in vertical mills.
  • a vertical mill consists of a drive shaft on which are keyed discs having at their periphery articulated hammers, this assembly being housed in a cylindrical enclosure whose lateral part is constituted by a grid, the products to be ground being introduced at the upper part of said enclosure.
  • the present invention which overcomes these drawbacks, is remarkable in that the grid can be moved along the axis of the mill.
  • the crusher is constituted by discs 1, driven by a shaft 2 with a vertical axis, each of said discs having hammers 3 at its periphery.
  • This assembly is disposed in an enclosure delimited, laterally, by a cylindrical grid 4, at the bottom, by a bottom 5 and, at the top, by the lower part 6 of a loading hopper 7.
  • the crusher is completed by a cylindrical ferrule 8 providing between its internal face and the grid 4 an annular space 9 for recovering ground coffee.
  • the products to be ground are introduced from above and are subjected to the action of the first stage of hammers. Following this action, a certain part of the product passes through the grid 4 while the rest is taken up by the lower stage of the mill and so on.
  • the result obtained depends on a certain number of parameters such as: the dimensions of the mesh of the grid, the distance separating it from the end of the hammers, the number of stages of hammers and the speed of rotation of the latter . It therefore turns out that the only parameter on which it is easy to act is the speed of rotation of the hammers. Experience has shown that this adjustment is insufficient in view of the different situations in which the mill is used.
  • the grid 4 which is in the form of a cylindrical shell, can be moved along the axis of the shaft 2 for driving the hammers.
  • the grid 4 has pads, or the like, guided on three vertical rails arranged against the internal wall of the ferrule 8. It is also conceivable that the movement of the grid is ensured by a, or more, jack arranged in the annular space 9.
  • the grid 4 is held by two rings 10 joined by columns 11 preferably comprising the aforementioned guide members.
  • FIG. 2 shows the position of the movable grid of the invention for a product and a given particle size.
  • the term "grain size" is not entirely correct because in many in many cases what is sought after is a final product comprising a certain percentage of very fine grains compared to an average particle size.
  • the grid 4 will be located upwards the more the percentage of very fine grains will be low and vice versa.
  • the grid can be replaced by a ferrule without perforation. It is also possible to design a mixed grid, that is to say comprising only perforations towards its lower part.
  • the mill can have two grids 4 and 4a as shown in FIG. 2.
  • the grid 4a has perforations whose dimensions are different from those of the grid 4.
  • the diameter of the grid 4a is different from that of the grid 4. This characteristic which makes it possible to cooperate in adjusting the particle size also makes it possible to compensate for the wear of the hammers and to reduce the intervention time. on these.
  • the grid 4a is used; after a certain wear, the grid 4 is used.
  • the mesh dimensions of the two grids are preferably identical.
  • the mill of the invention may include more than two movable grids.
  • the same grid can have different diameters.

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

Abstract

The grinder is constituted by two discs (1) rotated by a vertical axis shaft (2). Each disc has on its periphery hammers (3). This assembly is located in a chamber delimited laterally by a cylindrical grille (4), a bottom (5) and at the top by the lower part of a loading hopper (7). The grille is held by two rings (10) connected by columns (11) having guides. The grinder is completed by a cylindrical collar (8). Located between the collar internal face and the grill is an annular space (9) for the recovery of grinds. The grille can be displaced along the shaft axis so as to adjust the granule size.

Description

La présente invention est relative à des perfectionnements aux broyeurs verticaux.The present invention relates to improvements in vertical mills.

Un broyeur vertical se compose d'un arbre d'entraînement sur lequel sont clavetés des disques comportant à leur périphérie des marteaux articulés, cet ensemble étant logé dans une enceinte cylindrique dont la partie latérale est constituée par une grille, les produits à broyer étant introduits à la partie supérieure de ladite enceinte.A vertical mill consists of a drive shaft on which are keyed discs having at their periphery articulated hammers, this assembly being housed in a cylindrical enclosure whose lateral part is constituted by a grid, the products to be ground being introduced at the upper part of said enclosure.

Un des problèmes qui se pose consiste à régler la granulométrie de la mouture. En l'état actuel de la technique, on dispose de deux moyens. Le premier consiste à faire varier la vitesse de rotation de l'arbre d'entraînement des marteaux, le second , qui peut être combiné au premier, consiste à faire varier le diamètre des perforations de la grille. Ce dernier moyen est très difficile à mettre en oeuvre puisqu'il implique le changement de la grille, ce changement conduisant en fait, à démonter le broyeur avec tous les inconvénients que cela présente.One of the problems which arises consists in regulating the grain size of the grind. In the current state of the art, there are two ways. The first is to vary the speed of rotation of the hammer drive shaft, the second, which can be combined with the first, is to vary the diameter of the grid perforations. The latter means is very difficult to implement since it involves changing the grid, this change in fact leading to dismantling the mill with all the disadvantages that this presents.

La présente invention, qui remédie à ces inconvénients, est remarquable en ce que la grille peut être déplacée selon l'axe du broyeur.The present invention, which overcomes these drawbacks, is remarkable in that the grid can be moved along the axis of the mill.

D'autres caractéristiques et avantages de l'invention ressortiront mieux par la description qui va suivre faite en se reférant aux dessins annexés à titre d'exemple indicatif, seulement, sur lesquels :

  • la figure 1 est une vue en coupe verticale d'un broyeur conforme à l'invention;
  • la figure 2 est une vue, très schématique, analogue à celle 1, montrant une variante de réalisation.
Other characteristics and advantages of the invention will emerge more clearly from the description which follows, given with reference to the accompanying drawings by way of indicative example only, in which:
  • Figure 1 is a vertical sectional view of a mill according to the invention;
  • Figure 2 is a view, very schematic, similar to that 1, showing an alternative embodiment.

En se reportant aux dessins on voit que le broyeur est constitué par des disques 1, entraînés par un arbre 2 à axe vertical, chacun desdits disques comportant à sa périphérie des marteaux 3. Cet ensemble est disposé dans une enceinte délimitée, latéralement, par une grille cylindrique 4, en bas, par un fond 5 et, en haut, par la partie inférieure 6 d'une trémie de chargement 7. Le broyeur est complété par une virole cylindrique 8 ménageant entre sa face interne et la grille 4 un espace annulaire 9 de récupération des moutures.Referring to the drawings, it can be seen that the crusher is constituted by discs 1, driven by a shaft 2 with a vertical axis, each of said discs having hammers 3 at its periphery. This assembly is disposed in an enclosure delimited, laterally, by a cylindrical grid 4, at the bottom, by a bottom 5 and, at the top, by the lower part 6 of a loading hopper 7. The crusher is completed by a cylindrical ferrule 8 providing between its internal face and the grid 4 an annular space 9 for recovering ground coffee.

Les produits à broyer sont introduits par le haut et sont soumis à l'action du premier étage de marteaux. A la suite de cette action, une certaine partie du produit traverse la grille 4 tandis que le reste est repris par l'étage inférieur du broyeur et ainsi de suite.The products to be ground are introduced from above and are subjected to the action of the first stage of hammers. Following this action, a certain part of the product passes through the grid 4 while the rest is taken up by the lower stage of the mill and so on.

Le résultat obtenu dépend d'un certain nombre de paramètres tels que : les dimensions des mailles de la grille, la distance séparant celle-ci de l'extrémité des marteaux, le nombre d'étages de marteaux et la vitesse de rotation de ces derniers. Il s'avère donc que le seul paramètre sur lequel il est facile d'agir est la vitesse de rotation des marteaux. L'expérience a montré que ce réglage était insuffisant compte tenu des différentes situations selon lesquelles le broyeur est utilisé.The result obtained depends on a certain number of parameters such as: the dimensions of the mesh of the grid, the distance separating it from the end of the hammers, the number of stages of hammers and the speed of rotation of the latter . It therefore turns out that the only parameter on which it is easy to act is the speed of rotation of the hammers. Experience has shown that this adjustment is insufficient in view of the different situations in which the mill is used.

Selon l'invention, la grille 4, qui se présente sous la forme d'une virole cylindrique, peut être déplacée selon l'axe de l'arbre 2 d'entraînement des marteaux.According to the invention, the grid 4, which is in the form of a cylindrical shell, can be moved along the axis of the shaft 2 for driving the hammers.

Naturellement, des moyens sont prévus pour guider la grille. Ces moyens sont à la portée de l'homme de l'art et non pas été représentés. A titre d'exemple on pent concevoir que la grille 4 présente des patins, ou analogues, guidés sur trois rails verticaux disposés contre la paroi interne de la virole 8. On peut concevoir, également que le déplacement de la grille soit assuré par un, ou plusieurs , vérin disposé dans l'espace annulaire 9.Naturally, means are provided to guide the grid. These means are within the reach of ordinary skill in the art and have not been shown. By way of example, it is conceivable that the grid 4 has pads, or the like, guided on three vertical rails arranged against the internal wall of the ferrule 8. It is also conceivable that the movement of the grid is ensured by a, or more, jack arranged in the annular space 9.

Selon un mode de réalisation, la grille 4 est maintenue par deux anneaux 10 réunis par des colonnes 11 comportant, de préférence, les organes de guidage précités.According to one embodiment, the grid 4 is held by two rings 10 joined by columns 11 preferably comprising the aforementioned guide members.

La figure 2 montre la position de la grille mobile de l'invention pour un produit et une granulométrie donnée. En fait, le terme "granulométrie" n'est pas tout à fait exact car dans de nombreux cas ce qui est recherché c'est un produit final comportant un certain pourcentage de grains très fins par rapport à une granulométrie moyenne. Ainsi, dans le cas de la figure 2 et pour une vitesse de rotation donnée, plus la grille 4 sera située vers le haut plus le pourcentage de grains très fins sera faible et inversement.FIG. 2 shows the position of the movable grid of the invention for a product and a given particle size. In fact, the term "grain size" is not entirely correct because in many in many cases what is sought after is a final product comprising a certain percentage of very fine grains compared to an average particle size. Thus, in the case of FIG. 2 and for a given speed of rotation, the more the grid 4 will be located upwards the more the percentage of very fine grains will be low and vice versa.

De l'explication ci-dessus, il ressort que la grille peut être remplacée par une virole sans perforation. On peut, également, concevoir une grille mixte c'est-à-dire ne comportant des perforations que vers sa partie inférieure.From the above explanation, it appears that the grid can be replaced by a ferrule without perforation. It is also possible to design a mixed grid, that is to say comprising only perforations towards its lower part.

Il ressort de l'invention que, par un déplacement judicieux de la grille (4-10-11) il est possible de démasquer totalement les marteaux 3 pour permettre leur remplacement à partir d'une ouverture 12 prévue dans la virole 8 et normalement obturée par un volet, non représenté.It emerges from the invention that, by judicious movement of the grid (4-10-11) it is possible to completely unmask the hammers 3 to allow their replacement from an opening 12 provided in the shell 8 and normally closed. by a flap, not shown.

Selon une autre caractéristique de l'invention, le broyeur peut comporter deux grilles 4 et 4a comme cela ressort de la figure 2.According to another characteristic of the invention, the mill can have two grids 4 and 4a as shown in FIG. 2.

La grille 4a présente des perforations dont les dimensions sont différentes de celles de la grille 4.The grid 4a has perforations whose dimensions are different from those of the grid 4.

D'une façon générale les caractéristiques de la grille 4a sont différentes de celles de la grille 4.In general, the characteristics of grid 4a are different from those of grid 4.

Selon une caractéristique de l'invention le diamètre de la grille 4a est différent de celui de la grille 4. Cette caractéristique qui permet de coopérer au réglage de la granulométrie permet aussi de compenser l'usure des marteaux et de réduire le temps d'intervention sur ces derniers. Lorsque les marteaux sont neufs, la grille 4a est utilisée; après une certaine usure, on utilise la grille 4. Dans ce cas, les dimensions des mailles des deux grilles sont, de préférence, identiques.According to a characteristic of the invention, the diameter of the grid 4a is different from that of the grid 4. This characteristic which makes it possible to cooperate in adjusting the particle size also makes it possible to compensate for the wear of the hammers and to reduce the intervention time. on these. When the hammers are new, the grid 4a is used; after a certain wear, the grid 4 is used. In this case, the mesh dimensions of the two grids are preferably identical.

Le broyeur de l'invention peut comporter plus de deux grilles mobiles.The mill of the invention may include more than two movable grids.

Bien entendu, la présente invention ne se limite pas aux modes de réalisation décrits et représentés, mais s'étend au contraire à toutes variantes de formes et dimensions.Of course, the present invention is not limited to the embodiments described and shown, but on the contrary extends to all variants of shapes and dimensions.

C'est ainsi, entre autres, que la même grille peut présenter des diamètres différents.Thus, among other things, the same grid can have different diameters.

Claims (4)

Broyeur à axe vertical du genre de ceux comportant une grille pouvant être déplacée selon l'axe d'entraînement des marteaux (3) usuels, caractérisé en ce que le réglage de la granulométrie s'effectue en déplaçant le bord inférieur de la grille (4) par rapport aux marteaux.Crusher with vertical axis of the type of those comprising a grid which can be moved along the axis of drive of the usual hammers (3), characterized in that the adjustment of the particle size is effected by moving the lower edge of the grid (4 ) compared to hammers. Broyeur selon la revendication 1, caractérisé en ce que la grille est constituée, en tout ou partie, au moyen d'une virole cylindrique ne présentant pas de perforation.Crusher according to claim 1, characterized in that the grid is formed, in whole or in part, by means of a cylindrical shell having no perforation. Broyeur selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'il comporte, au moins, deux grilles (4-4a), coaxiales et superposées, présentant des caractéristiques différentes.Crusher according to any one of claims 1 or 2, characterized in that it comprises, at least, two grids (4-4a), coaxial and superimposed, having different characteristics. Broyeur selon la revendication 3. caractérisé en ce que les diamètres des grilles sont différents.Crusher according to claim 3. characterized in that the diameters of the grids are different.
EP19960401485 1995-07-07 1996-07-05 Vertical-shaft crusher Expired - Lifetime EP0752273B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508225 1995-07-07
FR9508225A FR2736283B1 (en) 1995-07-07 1995-07-07 VERTICAL AXIS CRUSHER

Publications (2)

Publication Number Publication Date
EP0752273A1 true EP0752273A1 (en) 1997-01-08
EP0752273B1 EP0752273B1 (en) 2002-06-12

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Family Applications (1)

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EP19960401485 Expired - Lifetime EP0752273B1 (en) 1995-07-07 1996-07-05 Vertical-shaft crusher

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EP (1) EP0752273B1 (en)
DE (1) DE69621702D1 (en)
ES (1) ES2177744T3 (en)
FR (1) FR2736283B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1506815A1 (en) * 2003-08-13 2005-02-16 Satake Corporation Impact grinding apparatus for cereal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227090A (en) * 1940-04-01 1940-12-31 Don E Hughes Crushing and grinding machine
FR1288196A (en) * 1961-02-09 1962-03-24 Comm Salins Du Midi Soc Multifunctional grinding machine
DE2255418A1 (en) * 1971-11-09 1973-05-17 Acton V E H IMPACT OR IMPACT CRUSH
DE8804662U1 (en) * 1987-04-09 1988-07-07 Martinez Aranda, Santiago, Zaragoza, Es
DE8810234U1 (en) * 1988-08-12 1988-09-22 Torfwerk Gebr. Brill Gmbh & Co. Kg, 4458 Georgsdorf, De
EP0525362A1 (en) * 1991-07-22 1993-02-03 Bühler Ag Hammer mill

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227090A (en) * 1940-04-01 1940-12-31 Don E Hughes Crushing and grinding machine
FR1288196A (en) * 1961-02-09 1962-03-24 Comm Salins Du Midi Soc Multifunctional grinding machine
DE2255418A1 (en) * 1971-11-09 1973-05-17 Acton V E H IMPACT OR IMPACT CRUSH
DE8804662U1 (en) * 1987-04-09 1988-07-07 Martinez Aranda, Santiago, Zaragoza, Es
DE8810234U1 (en) * 1988-08-12 1988-09-22 Torfwerk Gebr. Brill Gmbh & Co. Kg, 4458 Georgsdorf, De
EP0525362A1 (en) * 1991-07-22 1993-02-03 Bühler Ag Hammer mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1506815A1 (en) * 2003-08-13 2005-02-16 Satake Corporation Impact grinding apparatus for cereal

Also Published As

Publication number Publication date
FR2736283B1 (en) 1997-09-26
EP0752273B1 (en) 2002-06-12
DE69621702D1 (en) 2002-07-18
ES2177744T3 (en) 2002-12-16
FR2736283A1 (en) 1997-01-10

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