EP0591649B1 - Broyeur à meules - Google Patents

Broyeur à meules Download PDF

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Publication number
EP0591649B1
EP0591649B1 EP93112896A EP93112896A EP0591649B1 EP 0591649 B1 EP0591649 B1 EP 0591649B1 EP 93112896 A EP93112896 A EP 93112896A EP 93112896 A EP93112896 A EP 93112896A EP 0591649 B1 EP0591649 B1 EP 0591649B1
Authority
EP
European Patent Office
Prior art keywords
grinding track
rotor
grinding
edge mill
outer rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93112896A
Other languages
German (de)
English (en)
Other versions
EP0591649A1 (fr
Inventor
Franz Vogel
Hartwig Müller
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.)
Ingenieurbuero Franz Vogel GmbH
Original Assignee
Ingenieurbuero Franz Vogel GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ingenieurbuero Franz Vogel GmbH filed Critical Ingenieurbuero Franz Vogel GmbH
Publication of EP0591649A1 publication Critical patent/EP0591649A1/fr
Application granted granted Critical
Publication of EP0591649B1 publication Critical patent/EP0591649B1/fr
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
    • B02C15/14—Edge runners, e.g. Chile mills

Definitions

  • the invention relates to a pan mill for the preparation of moist ceramic masses, in particular brick clay, according to the preamble of claim 1.
  • a pan mill for the preparation of moist ceramic masses, in particular brick clay, according to the preamble of claim 1.
  • Such a pan mill is known from DE 36 40 081 A1.
  • the regrind is subjected to a positive guidance in such a way that it has to pass through a spiral path on the grinding track surface from the inside to the outside and is thereby subjected to several rollover processes.
  • This ensures a comparatively long residence time of the regrind with several roll-over processes by the inner and outer rotor, even with large throughput quantities per unit of time.
  • the degree of comminution of the ground material is largely determined by the passage openings provided in the outer area of the grinding track surface.
  • the degree of comminution determined by the passage openings can be changed only with great effort, namely generally only by exchanging the grinding track surface. Further is the wear of the grinding track in the area of the passage openings is greater than in its remaining area, which results in uneven wear of the grinding track area.
  • An uneven grinding track surface not only leads to an uneven grinding process, but also brings about the risk of damage to the rotor surfaces, their suspension and if the runners roll directly on the grinding track surface, which can happen before or after or when the material feed is interrupted / or their drive with them.
  • the object of the present invention is therefore to improve the known pan mill so that a high degree of comminution of the ground material is achieved, which is variable and easily adjustable. Furthermore, the wear of the grinding track surface should be kept as small as possible and, above all, as uniform as possible. This object is achieved by the features of claim 1.
  • the invention In contrast to the known pan millers, in which the grinding track surface is provided with through openings in its outer area, the invention therefore provides an unperforated, continuous ring plate as the grinding track. Due to the complete absence of the grinding path perforation, an extension of the rollover or squeezing path and thus a higher degree of comminution of the material to be ground is achieved in a simple manner. Since the two runners are mounted so that they can be adjusted vertically, the distance between the runners, in particular the outer rotor and the grinding track surface, can be measured. The degree of comminution of the ground material can be determined by this distance.
  • the material to be ground is automatically guided back inwards in the direction of rotation in front of the inner or outer rotor by the automatic change in the position of the outer steering surface during operation and rolled over until the desired degree of comminution is reached is. Only then is the position of the outer steering surface changed again so that the ground material can fall over the outer edge of the grinding path onto the collecting plate.
  • the grinding tracks of the inner and outer rotor do not either completely overlap or at least partially overlap, as in the known pan mill, but are completely separated from one another, that is to say they connect to one another, or even a small one There is an annular gap between the two.
  • the grinding track surface has no through openings, but is formed by a uniform, continuous ring plate, and that the two grinding tracks of the runners are separated from one another does not result in the known uneven wear of the grinding track surface and rotor surfaces the increased wear of the perforated grinding track area and furrow-like wear phenomena of the overlap area and that the service life of the grinding track surface and the rotor surfaces is increased considerably as a result.
  • the diameter of the center column carrying the grinding track is chosen so large that it essentially covers the entire grinding track area supported.
  • the pan mill shown in FIG. 1 rests on a central column 10 and an overlying support base 12 on which an annular continuous plate 14 rests, which is supported essentially over its entire surface by the support base 12 or the central column 10.
  • Center column 10 and support base 12 are penetrated by a vertical vertical shaft 15, which is driven at its lower end by a gear 16 by a motor 16 and whose upper end is located above plate 14.
  • the ring plate 14 is surrounded at a distance by a radially displaceable, vertically upwardly projecting side wall 17 which is supported by a column 11.
  • transverse webs a console or the like can also be provided.
  • a channel-shaped material feed 23 sits on the free upper end of the vertical shaft 15 Upper end via a conveyor, not shown, such as a belt conveyor, is fed with the material to be shredded, while the lower end 23a is arranged above the material web surface in such a way that the material is only directly in the direction of rotation of the rotor (arrow direction A in FIG. 2) the inner rotor 18 is delivered to the grinding track surface.
  • the material feed 23 is rigidly connected to the vertical shaft 15 so that it rotates with it.
  • the grinding track plate 14 is divided into an inner grinding track surface 14a and an outer grinding track surface 14b, the inner grinding track surface 14a being overrun by the inner runner 18 and the outer grinding track surface 14b by the outer runner 19.
  • the steering surfaces 24 and 25 are designed as wipers or drivers and to the direction of movement of the runners 18, 19 inclined.
  • two vertically adjustable material guide elements 26 and 27, which also rotate with the vertical shaft 15, are attached to the vertical shaft 15, which lead the inner rotor 18 and the outer rotor 19 in the direction of rotation thereof.
  • the inner material guide element 26 is essentially arranged opposite the discharge opening 23a of the material feed 23 with the latter on a radial line in order to prevent the material fed onto the grinding track 14 from directly reaching the outer grinding track surface section 14b.
  • the outer material guide element 27 lies in the region of the outer circumference of the outer grinding track section 14b essentially on the radial line of the outer end of the inner steering surface 24.
  • the two runners 18, 19 are arranged diagonally to one another; the representation of Fig. 1 with both Runners on the same radius do not correspond to the actual execution and have only been chosen for better understanding.
  • the regrind for example moist brick clay
  • the material is rolled over and crushed several times by the two runners 18, 19, the two steering surfaces 24, 25 being set up in such a way that the rolled material is moved spirally from the inside to the outside to the discharge area 21.
  • the two runners 18, 19 are mounted so as to be vertically displaceable, and the distance between the runners 18, 19 and the grinding track surface 14 is dependent on the degree of comminution of the material to be ground. This distance is determined at intervals or continuously during operation of the pan mill and is used as a control variable for the position of the adjustable outer steering surface 25.
  • the outer steering surface 25 assumes the position shown in solid lines in FIG. 2 and guides the material spirally outward via the grinding track surface 14 to the discharge area 21. From there, the ground material falls onto the one arranged under the discharge region 21, in the opposite direction to the direction of movement of the runners 18, 19 rotating collecting plate 22 and is removed from there.
  • the direction of rotation of the collecting plate 22 opposite to the direction of movement of the runners serves in particular for the particularly uniform discharge of the ground material.
  • a rotor-grinding path distance is determined which is above a predetermined target value, ie if the desired degree of comminution has not yet been reached, the position of the outer steering surface 25 is automatically changed so that this Fig. 2 assumed position shown in dashed lines, and the regrind is returned on the grinding track 14 from the outside to the inside. In any case, the regrind is rolled over until the desired degree of comminution is reached.
  • not only the outer steering surface 25, but also the inner steering surface 24 is adjustable, so that the degree of pre-comminution can already be controlled by optionally returning the ground material to the inner grinding path section 14a.
  • a filter screen (not shown) can be provided in the discharge area 21, which prevents pieces of regrind that are still too large from falling onto the collecting plate 22 and being conveyed away.
  • the co-rotating inner material guiding element 26 for the inner rotor 18 and the co-rotating outer material guiding element 27 for the outer rotor 19 are provided.
  • the distance between the lower edge of each material guide element 26, 27 and the grinding track surface can be adapted to the desired degree of comminution, so that if the material is still coarsely ground, some of the material to be ground is retained on the grinding track 14 by the material guide elements.
  • the outer material guide element 27 also prevents the material which has been comminuted on the inner grinding track surface 14a and passed through the rotating steering surface 24 onto the outer grinding track surface 14b from reaching the discharge area 21 directly.
  • the arrangement according to the invention ensures that the ground material is rolled over on the unperforated grinding track 14 until the desired degree of comminution is reached.
  • the degree of comminution can be easily and precisely adjusted by specifying the desired distance from the rotor to the grinding track surface changeable. Furthermore, a very high degree of comminution can be achieved with the device according to the invention.
  • the two grinding tracks of the rotors 18 and 19 do not overlap, but rather connect with one another with no or with a minimal gap.
  • the distance a of the vertical outer surface of the inner runner 18 from the central runner axis is equal to or slightly less than the distance b of the inner vertical surface of the outer runner 19 from the central runner axis.
  • a ⁇ b holds.
  • the inner grinding track surface 14a is therefore only rolled over by the inner rotor 18, the outer grinding track surface 14b exclusively by the outer rotor 19.
  • the wear of the inner grinding surface 14a and that of the outer grinding surface 14b and the rotor surfaces 18 and 19 is therefore extremely uniform.
  • the wear of the two grinding track surfaces 14a, 14b above the rotor surfaces 18, 19 also differs only slightly from one another, because according to the invention both grinding track sections 14a, 14b are formed by unperforated, continuous ring plates, the total load of which is essentially the same.
  • a slightly uneven loading of the grinding track surface 14 results only from the fact that the dwell times of the ground material in the respective sections 14a and 14b and the mean orbit lengths for the two runners 18 and 19 differ slightly from one another.
  • the rotor surfaces 18 and 19 also wear differently because they have different rolling areas and different rolling behavior.
  • the fact that the two grinding track surfaces 14a, 14b and rotor surfaces 18 and 19 are separate components results in no difficulties from the uneven wear; each grinding track surface is replaced independently of the other as required.
  • the center column 10 has a considerable diameter, such that it the grinding track plate 14 or the support base 12 approximately in the center of the outer runner 19 supported.
  • the radius of the center column 10 is equal to or greater than the radius of the center point of the outer rotor 18, in each case with respect to the center axis of the pan mill.
  • the support base 12 is dimensioned such that inner and outer grinding track surfaces 14a, 14b are completely supported by the support base 12; this ensures that the grinding track plate 14 manages with a comparatively simple and easy support.
  • the central column was comparatively slim and complex and heavy support structures were required to support the grinding track, namely support structures with a weight of several tons.
  • the construction according to the invention results in considerable weight and cost savings.
  • the side wall 17 surrounding the grinding track surface 14 at a distance prevents material from escaping laterally over the edge of the pan pass, and moreover serves as protection against the rotating runners 18, 19 of the dropping area 21 may be provided.
  • the side wall 17 can also be mounted in a radially displaceable manner in order to enlarge or reduce the discharge area as required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Centrifugal Separators (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Inert Electrodes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (8)

  1. Broyeur à meules verticales pour la préparation de pâtes céramiques humides, notamment d'argile, comprenant une piste de broyage (14) horizontale, en forme de disque circulaire, qui est portée par un fond porteur (12) appuyé en position centrale sur une colonne centrale verticale (10), un rotor intérieur et un rotor extérieur (18, 19) qui circulent dans la direction circonférentielle de la piste de broyage (14), sur cette dernière, un arbre principal (15) qui entraîne les rotors au centre, des surfaces déflectrices (24, 25) qui suivent les rotors dans le sens du mouvement de ces derniers, qui sont orientées de manière que la matière à broyer sur laquelle les rotors ont roulé se déplace en spirale sur la piste de broyage, de l'intérieur vers l'extérieur, et une amenée de matière (23) qui apporte continuellement la matière à broyer sur la piste de broyage, caractérisé en ce que la piste de broyage (14) est une plaque annulaire non perforée, en ce que la surface déflectrice extérieure (25), qui suit le rotor extérieur, peut être réglée entre deux positions de telle manière que, dans une des positions, la matière à broyer sur laquelle le rotor extérieur (19) a roulé se déplace de l'intérieur vers l'extérieur et passe au-dessus du bord extérieur de la piste de broyage (14), pour atteindre une région de déversement (21) tandis que, dans l'autre des positions, elle revient de l'extérieur vers l'intérieur dans le sens circonférentiel pour se placer devant l'un des rotors (18, 19), et en ce qu'un dispositif de mesure mesure la distance verticale entre le rotor extérieur (19) et la surface (14) de la piste de broyage, et un servo-dispositif modifie la position de la surface déflectrice extérieure (25) en fonction de la distance mesurée.
  2. Broyeur à meules verticales selon la revendication 1, caractérisé en ce que l'amenée de matière (23) est agencée de telle manière, et entraînée par l'arbre principal (15), de telle manière que la matière à broyer puisse être chargée de façon déterminée sur la piste de broyage (14), exclusivement directement devant le rotor intérieur (18).
  3. Broyeur à meules verticales selon la revendication 1 ou 2, caractérisé en ce que le rayon intérieur de la piste de roulement annulaire du rotor extérieur (19) est égal ou supérieur au rayon extérieur de la piste de roulement annulaire du rotor intérieur (18).
  4. Broyeur à meules verticales selon une des revendications précédentes, caractérisé en ce que la piste de broyage (14) est divisée en une surface intérieure (14a) de la piste de broyage et une surface extérieure (14b) de la piste de broyage, la surface intérieure de la piste de broyage étant associée à la voie de roulement du rotor intérieur (18) et la surface extérieure de la piste de broyage étant associée à la voie de roulement du rotor extérieur (19).
  5. Broyeur à meules verticales selon une des revendications précédentes, caractérisé en ce que la colonne centrale (10) possède un rayon qui est égal ou supérieur au rayon du centre du rotor extérieur (19), rapporté à la verticale centrale du broyeur, cependant que le fond porteur (12) qui est appuyé sur la colonne centrale (10) présente un rayon extérieur qui est égal ou légèrement supérieur au rayon extérieur de la surface extérieure (14) de la piste de broyage.
  6. Broyeur à meules verticales selon une des revendications précédentes, caractérisé par des éléments de guidage de matière intérieur et extérieur (26 et 27), qui sont réglables en hauteur et qui sont respectivement en avance sur le rotor intérieur et sur le rotor extérieur (18 et 19 respectivement) dans le sens de la circulation.
  7. Broyeur à meules verticales selon une des revendications précédentes, caractérisé par un tamis filtrant agencé à la périphérie de la piste de broyage (14), dans la région de déversement (21) entre le plateau collecteur (22) et la circonférence de la piste de broyage.
  8. Broyeur à meules verticales selon une des revendications précédentes, caractérisé en ce qu'un plateau collecteur (22) agencé au-dessous de la piste de broyage (14) est mobile en rotation dans le sens inverse du sens de circulation des rotors (18, 19).
EP93112896A 1992-09-04 1993-08-11 Broyeur à meules Expired - Lifetime EP0591649B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4229488A DE4229488C1 (de) 1992-09-04 1992-09-04 Kollergang
DE4229488 1992-09-04

Publications (2)

Publication Number Publication Date
EP0591649A1 EP0591649A1 (fr) 1994-04-13
EP0591649B1 true EP0591649B1 (fr) 1996-11-20

Family

ID=6467178

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Application Number Title Priority Date Filing Date
EP93112896A Expired - Lifetime EP0591649B1 (fr) 1992-09-04 1993-08-11 Broyeur à meules

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EP (1) EP0591649B1 (fr)
AT (1) ATE145350T1 (fr)
DE (2) DE4229488C1 (fr)
ES (1) ES2095534T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442099C2 (de) * 1994-11-25 1997-08-14 Loesche Gmbh Wälzmühle
CN117548189B (zh) * 2023-12-14 2026-02-13 马鞍山瑞恒精密制造有限公司 一种矿粉碾碎装置及使用方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE487481C (de) * 1929-12-07 W & J Scheid Aus mit den Mahlkoerpern umlaufenden Schabern bestehende Misch-und Entleerungsvorrichtung an Kollergaengen
DE596417C (de) * 1934-05-08 W & J Scheid Mischvorrichtung an Kollergaengen
DE1976039U (de) * 1967-10-24 1967-12-28 Gelsenkirchener Bergwerks Ag Kollergang, insbesondere fuer eine zerkleinerung harter materialien, insbesondere koksgrus.
FR2376093A1 (fr) * 1976-12-28 1978-07-28 Poudres & Explosifs Ste Nale Dispositif pour le meulage en continu des poudres explosives
DE3640081A1 (de) * 1986-11-24 1988-06-01 Rieter Werke Haendle Kollergang
DE3806725A1 (de) * 1988-03-02 1989-09-14 Rupert Dipl Ing Sogl Einrichtung zur kollergang-beschickung und -austragung
DE9017356U1 (de) * 1990-12-22 1991-03-21 Rieter-Werke Händle KG, 78467 Konstanz Kollergang, insbesondere zur kontinuierlichen trockenen oder nassen Aufbereitung von mineralischem Gut

Also Published As

Publication number Publication date
ES2095534T3 (es) 1997-02-16
EP0591649A1 (fr) 1994-04-13
DE59304530D1 (de) 1997-01-02
ATE145350T1 (de) 1996-12-15
DE4229488C1 (de) 1994-02-17

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