EP2830794A1 - Stirring roller for a machine for the continuous casting of metallic products of broad cross section - Google Patents

Stirring roller for a machine for the continuous casting of metallic products of broad cross section

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Publication number
EP2830794A1
EP2830794A1 EP12719254.0A EP12719254A EP2830794A1 EP 2830794 A1 EP2830794 A1 EP 2830794A1 EP 12719254 A EP12719254 A EP 12719254A EP 2830794 A1 EP2830794 A1 EP 2830794A1
Authority
EP
European Patent Office
Prior art keywords
inductor
ferrule
support
shell ring
slab
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
EP12719254.0A
Other languages
German (de)
French (fr)
Other versions
EP2830794B1 (en
Inventor
Siebo Kunstreich
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.)
Rotelec SA
Original Assignee
Rotelec SA
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 Rotelec SA filed Critical Rotelec SA
Publication of EP2830794A1 publication Critical patent/EP2830794A1/en
Application granted granted Critical
Publication of EP2830794B1 publication Critical patent/EP2830794B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ

Definitions

  • the present invention relates to electromagnetic magnetic field equipment sliding for the movement of molten liquid metal in a metal product of wide cross section, such as a steel slab, during its solidification, in downstream of the mold, in the secondary cooling zone of the continuous casting plant which produces it.
  • the invention relates to the production of equipment of this type, usually called “Brew Roller” when it is integral with a support roll and guide the cast slab, made tubular for this purpose.
  • the electromagnetic part of such equipment is conventionally constituted by a polyphase linear inductor generating a moving magnetic field oriented perpendicularly to the surface of the envelope of the roller which surrounds it and which slides along the axis of rotation of this roll.
  • the second step is that of document FR 75/05623 published in August 1976, which lays down the basic technological design of the stirring roller with rotating inductor based on a shell and mechanical connecting members ensuring the support of the shell while leaving it free in axial rotation.
  • These members are schematically constituted by an assembly formed, on each side of the ferrule, by a frustoconical tubular flare, mounted at the end of the shell, and by a rolling bearing mounted on a support element deported beyond the limits of the ferrule and fixed to the chassis of the casting machine, the small base of the rocket coming to journal in this bearing.
  • the central inductor is, meanwhile, maintained and centered in an inner range of the large base of each rocket. At least one of the rockets (removable to allow mounting of the inductor in the ferrule) protrudes from its support bearing to allow the electrical connection of the inductor to an external polyphase supply.
  • the third step is that of EP-A-0 043 315 published in January 1982.
  • This document reveals in detail the successful operational realization of the roll brewer, fixed inductor this time, which is still current today: we find the same overall structure as the rotating inductor, except that the central inductor is held here by its own internal frame on which are wound the phase electric windings.
  • This framework forms for this purpose an axial shaft whose terminal extensions, narrowed in diameter, pass through the small bases of the rockets of the ferrule to engage in rolling bearings supporting the ferrule and fixed to the frame of the machine by the intermediate a flange keying mounted on the outer face of these bearings and which blocks the inductor in axial rotation.
  • This flange is also the bottom of a sealed water box with water inlets / outlets for cooling the ferrule and the inductor by circulating in the calibrated annular space separating the inductor of the ferrule.
  • the water box also playing the role of electrical connection panel, externally comprises the electrical terminals that connect the inductor to the external power supply.
  • such a known technology of a brewer roller is characterized in sum by the cooperation of two distinct coaxial subassemblies, one free in axial rotation. the other fixed, and both carried by the supports 4 of the ferrule 7 fixed to the chassis 5 of the casting machine:
  • a second assembly movable in axial rotation thereof, formed by the ferrule 1 intended to come in rolling contact with the slab 6 and by its two tubular flares 2 which extends at each of its ends to be journalled by their small base 13 in bearings 3 remote bearings mounted on the support elements 4 fixed to the chassis 5 of the machine.
  • water boxes 16, also serving as an electrical connection panel 18 of the inductor, externally cap the cradles 14 sealingly.
  • This type of brewer which turns out to be perfectly adapted to its dual support-brewing function, is commonly used for most continuous slab casting machines of standard width, ie up to 1600 -1700 mm, width at which the ferrule supported by two end bearings is still rigid enough not to take a crippling arrow.
  • This type of stirring roll could also be used for very wide slabs, ie greater than 2400 mm, by means of the introduction of two half rollers with intermediate rolling bearing, to ensure such a set its rigidity and stability. geometric straightness under the thermomechanical constraints imposed by the presence at its contact of a very broad slab during solidification (WO201 1/1 17479). On the other hand, for slabs of interlayer width, say from 2000 mm to +/- 20% (from 1600 to 2400 mm, so to fix the ideas), this technology turns out to be inapplicable.
  • the present invention aims to provide a technological design thereof free of end rockets to stiffen the shell, to to allow a more economical realization as well in cost of acquisition as of operation and, in addition, to be able to cover all the requirements in term of width of slabs, from 1600 mm (or less) to 2400 mm (and more).
  • the subject of the invention is a stirring roll for a machine for continuous casting of large cross section metal products, such as a slab, comprising:
  • an internal electromagnetic equipment consisting of at least one polyphase linear magnetic field inductor sliding, coaxially mounted with the ferrule so as to provide between them an annular space for the circulation of a cooling liquid, said equipment constituting a tree axial end provided with hollow end extensions which come into support blocked in axial rotation on said support elements, and
  • stirring roll characterized in that the ferrule carries on said terminal extensions of the inductor via said mechanical connecting members constituted by bearings interposed between the ferrule and said end extensions (preferably at the ends of the ferrule).
  • the idea underlying the invention is to make the inductor play the support function of the ferrule which rotates at a short distance around it.
  • rolling bearings of the ferrule, or more generally its mechanical connecting members leaving it in free axial rotation are separated from their traditional support elements integral with the structure of the casting machine.
  • the technological design according to the invention also opens up particularly attractive possibilities for a simplified embodiment of extra-long stirring rollers intended, as already pointed out, for large slab casting machines (over 1600 mm) whose trend is confirmed moreover. in addition to the global steel industry pushed by the requirements of ever increasing productivity of steel mills.
  • brewer roll comprises in fact no longer one, but two distinct aligned ferrules. These two ferrules are preferably of the same length, and provided with two additional intermediate bearings which bear on a central intermediate extension of the axial framework of the inductor. This intermediate extension is itself supported by a complementary central support fixed to the chassis of the casting machine.
  • Another advantage of the divided baffle roll is of operational order: in the case of very wide slabs, say beyond 2000 mm, it will be possible to assemble on the same axial inductor framework within the same brewer two inductors, electrically and magnetically independently of each other, while providing a central support fixed to the frame of the machine.
  • the brewing roll according to the invention compared to known traditional brewing rollers, is expressed by the fact that the end bearing bearings and the rockets have been removed and replaced by simple supports of a non-rotating fixed shaft represented by the terminal extensions of the inductor and that the shell rotates around this fixed shaft bearing on the latter by means of bearings that hold it.
  • FIG. 1 is a pedagogical representation, according to an axial sectional view, of a deliberately hybrid brewing roll to facilitate comparison with the prior art, in that its left end (in the figure) is made with the technology according to the invention, while its right end is shown in its usual known embodiment;
  • FIG. 2 is an axial sectional view of a stirrer roll in its basic version with a single shell (thus without central support);
  • FIG. 3 is an axial sectional view of an alternative embodiment with double ferrule and central support, called "split brewer roller"
  • a conventional brewing roller is essentially formed by an elongated tubular body rotating about its main axis of symmetry A-A.
  • This body is constituted by a shell, or ferrule, 1 nonmagnetic stainless steel and frustoconical flares 2 which maintain this ferrule at both ends, the small base 2a of each rocket being engaged in a rolling bearing 3 'integrated in a support 4 secured to the rigid frame 5 of the continuous casting machine.
  • This casting machine makes it possible to cast metal slabs 6 which progress from a mold in the high position to the cutting tool at the bottom of the machine. At the same time, progressively solidification of the molten metal from the periphery of the cast product 6 under the effect of intense cooling of its surface, by contact with the inner walls of the mold, then by direct watering of water in the stages of the secondary cooling of the casting machine, where precisely there are the brewing rollers of the machines which are equipped with them. It is here that the cast slab is held and guided in its slow downward movement by rotating support rollers that come, by a generator constantly renewed during the rotation, contact pressed each of large faces of the slab, such as the large face 7 in the figure.
  • the inductor 8 of the polyphase linear type, comprises a magnetic carcass 9 which serves as a winding support for the phase windings 10 which follow one another along the inductor so as to be able to generate a magnetic field, generally directed perpendicularly to the large faces slab 6, but mobile, namely sliding along the axis AA of the inductor when these coils 10 are properly connected to the terminals of an external polyphase supply (two-phase or three-phase) not shown.
  • This inductor 8 is, too, a body of axial symmetry on its longitudinal axis which merges with that AA of the ferrule] in order to be well centered on the latter by providing between them an annular space 1 1 for the circulation of a cooling fluid which will ensure the thermal maintenance of the stirrer roll in operation.
  • This axial centering is achieved by means of cylindrical end extensions 12 of the reduced diameter inductor so as to be able to engage with a simple functional play in the small base 2a of the rocket 2 and to exceed the limits thereof. beyond the bearing 3 by a bearing 13 which serves for keying to lock the inductor in axial rotation at an end plate 14 provided with the necessary keys.
  • Each end extension 12 which is hollow (axial channel 24) and provided with radial ducts 15 in communication with the annular space 1 1, opens into a water box 16 mounted at the end end on the end plate 14 and provided with a tubing 17 for entering or leaving the cooling water (outlet in the figure).
  • the water box 16 also serves as a connection terminal board 18 of the inductor 8 to an external polyphase electrical supply, the connection wires 19 of the inductor passing through the axial recess of its extension 12 to join the terminals 18.
  • the stirring roll according to the invention (whose constituent elements identical to those of the known stirring roll just described are designated by identical references) is distinguished from the known conventional technology by the fact that the rolling bearing 3 'and the rocket at each end of the roll are removed. This singularity makes it possible to free up space at the terminal extension 20 of the inductor 8 which then rests in support, locked in rotation by a shim 31, in the cradle formed by this fixed support 4.
  • this extension 20 is provided more massive, with a greater diameter than that of the similar extension 12 conventional brewer roller (right part of the figure), in order to strengthen if necessary its mechanical strength, since it will be on this point more solicited, as will be understood now.
  • bearings 3 alone replace the end rockets of the shell 1 (which are eliminated) in their function of maintaining and rotating the latter and, on the other hand On the other hand, these bearings 3 come directly on the terminal extension 20 of the inductor, which thus serves as support for the shell 1.
  • a bearing 3 will be fixed at each end of the ferrule.
  • This attachment can be provided, in a manner known per se, by a bolted crown not shown in the figures so as not to overload them unnecessarily.
  • annular cheek 32 mounted at the end of the ferrule to serve as a grease plate of the bearings 3 and which caps these bearings to protect them from dust and improve the tightness of the assembly.
  • FIG. 3 illustrates the technological variant of the invention applied in the case where the stirring roll is no longer with a single ferrule extending over the entire width of the cast slab, but with two half-ferrules 1a and 1b.
  • intermediate bearings 3c and 3d are held at their close ends by intermediate bearings 3c and 3d and are separated from each other a short distance (say between 10 and 20 cm) imposed by the presence between them. an intermediate extension 20c of the inductor.
  • the intermediate bearings 3c and 3d relate to the intermediate extension 20c of the inductor, which for this purpose is free of electrical windings and door on a central support 21 fixed to the chassis 5 of the casting machine.
  • such a brewing roll which will be described as "divided" for a reason that obviously follows from what has just been said, and actually formed by two half-rings marked la and lb, is an adequate response to the growing need, in the world of iron and steel in any case, to be able to continuously cast larger slabs, easily exceeding the limit of conventional brewing rollers of 1.6 / 1.7 m or 2.4 m wide and even more in the future probably close, because this divided roller is protected against a crippling arrow by the central support 21.
  • the terminal extensions of the inductor 20a or 20b, located at the ends of the roll, are hollow in order to be able to open,
  • a sealed water box 16a or 16b On one side, by their free end, in a sealed water box 16a or 16b, provided with a water inlet / outlet pipe 17a or 17b and whose terminal panel 18a or 18b forms one of walls (the front wall in the figure),
  • the intermediate extension 20c is also hollow and provided with radial drilled lines 15c. 15d in order to form a central leaktight conduit for communication between the two annular spaces 11a and 11b.
  • said annular space l ia formed between the half-ferrule la and the concentric inductor 8 to be able to ensure a circulation of water in the vicinity of the half-ferrule la and cool during and after its contact with the hot slab 6 and than to cool the left part of the inductor 8;
  • said annular space 1 lb formed between the half-shell 1b and the inductor 8 to be able to ensure a circulation of water in the vicinity of the periphery of the half-shell 1b and to cool during and after its contact with the hot slab 6 as well as to cool the right part of the inductor 8;
  • the intermediate extension 20c of the inductor implies, of course, that the electric windings 10 are spaced at this location, but the mechanical continuity between the left and right part of the inductor is provided by this extension which may be steel, or in the same material as the axial framework of the inductor.
  • this divided stirring roll may comprise two distinct electromagnetic inductors and separated, one in each half shell: an inductor 8a in the left half shell and an inductor 8b in the right half shell 1b.
  • an inductor 8a in the left half shell and an inductor 8b in the right half shell 1b are represented here, and according to a preferred embodiment of the invention, identical inductors 8a and 8b them and similar to the single inductor 8 of Figure 1 or 2.
  • inductors can be rendered mechanically integral by the intermediate extension 20c or separable for example to facilitate assembly, but meeting at the central support 21. As shown in the figure, a simple interlocking type "male-female" to this regard will be sufficient to ensure the mechanical connection of the two inductors.
  • Another aspect, which could be a disadvantage of this variant, is that the distance between the two half-rings would be correlatively greater and, with this distance, also the fraction of the width of the cast slab 6 left free of any support mechanically and uncooled in a "dead" zone at the intermediate bearings.
  • unwanted induced effects on the slab could be mitigated by providing sets of half-rings of varying lengths on the same roll. This would be shifted in this way, according to already well-known principles, the "dead" zones over the width of the slab cast from one roll to another over the height of the casting machine, in order to tend to homogenize the overall disruption after a few meters of progression of the slab in the direction of the casting.
  • the inductors 8a and 8b are linear type polyphase (three phase or more usually two-phase), each of them requires as many pairs of connection terminals than phases of its power supply: two pairs for a two-phase, three pairs for a three-phase (nevertheless being noted that in the case of an electrical installation of the inductor "without neutral output", its number of terminals will be three for one two-phase and three for three-phase).
  • An inductor of this type produces a magnetic field whose force lines are generally oriented perpendicular to the longitudinal axis AA of the inductor and mobile, because it can be dragged along this axis in one direction or the other by simple phase reversal of the power supply. It is thus understood that if one has two power supplies, or what amounts to the same, a split power supply, one can adjust the sliding fields on the two inductors 8a and 8b of the same brewer roller independently one on the other, which opens particularly interesting perspectives as to the possibilities of moving the molten metal within the slab during casting.
  • each inductor must have the complete set of windings to generate a sliding magnetic field (minimum four for two-phase inductor and six for three-phase inductor), while the single inductor leaves him, his set of coils between the left and right, which can for example increase the number of pairs of poles per phase.
  • connections of the coils of an inductor to the phases of the power supply will all be directed, preferably, to the same electrical connection panel present at one end of the roller and the connections of the other inductor will be directed all to the other connection panel mounted at the other end of the roll (here the connections 18a to the nearest panel 19a and the connections 18b to the panel 19b), whereas with a single inductor, half of the connections can be grouped on the left and the other half on the right.
  • the stirring rollers according to the invention in their embodiment without central support 21, can be integrated without particular difficulties to a segment of the structure of the casting machine carrying other usual rollers for supporting and guiding the slab.
  • the undivided stirring rollers with a single ferrule, and therefore without a central support, in accordance with one embodiment of the invention should rather be reserved for the casting of slabs of conventional width, that is to say until about 650 mm to fix the ideas. Beyond this, preference will be given to brewing rolls divided into two half-shells and a central support, however it is emphasized that, for all that, there is no contraindication to use them also for the casting of slabs of usual width. .
  • the bearings of the ferrule may be exposed to the heat of the slab during casting more than in the known technology of rocker rollers carrier staggered on either side of the ferrule. In a variant, it will therefore be possible to advantageously opt for bearings of hoop with thermal helical deformation.
  • This type of mechanical bearings is commercially available. In this connection, it is reported here, for information purposes only, the bearings produced and marketed by the German firm "Deutschrik Joseph EICH KG Gmbh.
  • rocket used to qualify the support elements mounted at the ends of the or two ferrules constituting a divided baffle roll, covers any transmission member capable of providing a connection a rigid seal between the ferrules and the rolling bearings which carry them in free axial rotation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)

Abstract

Stirring roller comprising: (a) a shell ring 1 made of nonmagnetic steel in rotation of axis A-A and intended to come into contact with the surface of a large face of the cast slab (6), (b) mechanical-connection members, arranged on each side of the shell ring to support the shell ring while leaving it free to rotate axially, (c) support elements 4 which are offset on either side beyond the limits of the shell ring and fixed to the chassis 5 of the casting machine, (d) internal electromagnetic equipment consisting of at least one polyphase linear inductor 8 mounted coaxially with respect to the shell ring so as to leave between the two an annular space 11 through which a cooling liquid can circulate, and which constitutes an axial shaft provided with terminal extensions 20 that rest, without the ability to rotate axially, on the fixed support elements 4 and which are hollow so as to allow the passage of the cooling liquid and of the electrical connections of the inductor, and (e) inlet/outlet casings 16 for the cooling liquid which are provided with electrical connection terminals 18a, 18b and mounted at the ends of the terminal extensions 20 of the inductor beyond the fixed support elements 4; this stirring roller, which is characterized in the shell ring bears against said terminal extensions (20) of the inductor (8) via rolling bearings (3), has been designed to be suitable also for the casting of extra-wide slabs.

Description

Rouleau Brasseur pour machine de coulée continue  Roller Brewer for continuous casting machine
de produits métalliques à large section droite.  metal products with a large straight section.
La présente invention concerne les équipements électromagnétiques à champ magnétique glissant pour la mise en mouvement du métal liquide encore en fusion au sein d'un produit métallique de section droite large, tel qu'une brame d'acier, au cours de sa solidification, en aval de la lingotière, dans la zone du refroidissement secondaire de l'installation de coulée continue qui la produit. The present invention relates to electromagnetic magnetic field equipment sliding for the movement of molten liquid metal in a metal product of wide cross section, such as a steel slab, during its solidification, in downstream of the mold, in the secondary cooling zone of the continuous casting plant which produces it.
Plus précisément, l'invention à trait à la réalisation d'un équipement de ce type, habituellement dénommé "Rouleau Brasseur" lorsqu'il fait corps avec un rouleau de soutien et de guidage de la brame coulée, rendu tubulaire à cet effet.  More specifically, the invention relates to the production of equipment of this type, usually called "Brew Roller" when it is integral with a support roll and guide the cast slab, made tubular for this purpose.
On rappelle que la partie électromagnétique d'un tel équipement est classiquement constituée par un inducteur linéaire polyphasé générant un champ magnétique mobile orienté perpendiculairement à la surface de l'enveloppe du rouleau qui l'entoure et qui glisse le long de l'axe de rotation de ce rouleau.  It is recalled that the electromagnetic part of such equipment is conventionally constituted by a polyphase linear inductor generating a moving magnetic field oriented perpendicularly to the surface of the envelope of the roller which surrounds it and which slides along the axis of rotation of this roll.
Si l'on effectue un historique rapide de cette technologie, aujourd'hui largement répandue dans la sidérurgie mondiale pour la coulée continue de brames, on est amené à retenir schématiquement trois temps.  If we make a rapid history of this technology, now widely used in the world steel industry for the continuous casting of slabs, we are led to schematically retain three times.
Le premier, celui du principe, est représenté par le document FR 72/20546 publié en décembre 1973 et qui décrit un inducteur linéaire central polyphasé monté coaxialement avec une virole en acier amagnétique qui l'entoure. Ainsi nait le rouleau-brasseur en tant qu'équipement actif apte à se substituer à un ou plusieurs rouleaux de soutien et de guidage pleins préexistants sur la machine de coulée. Déjà là, les deux versions fondamentales sont révélées: inducteur tournant avec l'enveloppe du rouleau (la virole) au contact de la surface de l'une des grandes faces de la brame coulée, ou inducteur fixe.  The first, that of the principle, is represented by document FR 72/20546 published in December 1973 and which describes a polyphase central linear inductor mounted coaxially with a non-magnetic steel ferrule which surrounds it. Thus, the stirring roll is formed as an active equipment capable of substituting for one or more pre-existing solid support and guide rollers on the casting machine. Already there, the two fundamental versions are revealed: inductor rotating with the envelope of the roll (the ferrule) in contact with the surface of one of the large faces of the cast slab, or fixed inductor.
Le second temps est celui du document FR 75/05623 publié en août 1976, lequel pose la conception technologique de base du rouleau-brasseur à inducteur tournant fondée sur une virole et des organes de liaison mécanique assurant le support de la virole tout en la laissant libre en rotation axiale. Ces organes sont ici constitués schématiquement par un ensemble formé, de chaque coté de la virole, par une fusée tubulaire tronconique, montée à l'extrémité de la virole, et par un palier à roulements monté sur un élément support déporté au delà des limites de la virole et fixé au châssis de la machine de coulée, la petite base de la fusée venant tourillonner dans ce palier. L'inducteur central est, quant à lui, maintenu et centré dans une portée intérieure de la grande base de chaque fusée. L'une au moins des fusées (amovible pour permettre le montage de l'inducteur dans la virole) dépasse de son palier support pour permettre la liaison électrique de l'inducteur à une alimentation polyphasée externe.  The second step is that of document FR 75/05623 published in August 1976, which lays down the basic technological design of the stirring roller with rotating inductor based on a shell and mechanical connecting members ensuring the support of the shell while leaving it free in axial rotation. These members are schematically constituted by an assembly formed, on each side of the ferrule, by a frustoconical tubular flare, mounted at the end of the shell, and by a rolling bearing mounted on a support element deported beyond the limits of the ferrule and fixed to the chassis of the casting machine, the small base of the rocket coming to journal in this bearing. The central inductor is, meanwhile, maintained and centered in an inner range of the large base of each rocket. At least one of the rockets (removable to allow mounting of the inductor in the ferrule) protrudes from its support bearing to allow the electrical connection of the inductor to an external polyphase supply.
Le troisième temps est celui du document EP-A-0 043 315 publié en janvier 1982. Ce document révèle de façon détaillée la réalisation opérationnelle aboutie du rouleau brasseur, à inducteur fixe cette fois, qui a toujours cours de nos jours: on y retrouve la même structure d'ensemble que celle à inducteur tournant, sauf que l'inducteur central est tenu ici par sa propre ossature interne sur laquelle sont bobinés les enroulements électriques de phase. Cette ossature forme à cet effet un arbre axial dont les extensions terminales, rétrécies en diamètre, passent par les petites bases des fusées de la virole pour venir en prise dans les paliers à roulement supportant la virole et fixés au châssis de la machine par l'intermédiaire d'un flasque de clavetage monté sur la face externe de ces paliers et qui bloque l'inducteur en rotation axiale. The third step is that of EP-A-0 043 315 published in January 1982. This document reveals in detail the successful operational realization of the roll brewer, fixed inductor this time, which is still current today: we find the same overall structure as the rotating inductor, except that the central inductor is held here by its own internal frame on which are wound the phase electric windings. This framework forms for this purpose an axial shaft whose terminal extensions, narrowed in diameter, pass through the small bases of the rockets of the ferrule to engage in rolling bearings supporting the ferrule and fixed to the frame of the machine by the intermediate a flange keying mounted on the outer face of these bearings and which blocks the inductor in axial rotation.
Ce flasque constitue par ailleurs le fond d'une boîte à eau étanche dotée des entrées/sorties d'eau pour le refroidissement de la virole et de l'inducteur par circulation dans l'espace annulaire calibré séparant l'inducteur de la virole. La boîte à eau, jouant également le rôle de panneau de connexion électrique, comporte extérieurement les bornes électriques qui relient l'inducteur à l'alimentation électrique externe.  This flange is also the bottom of a sealed water box with water inlets / outlets for cooling the ferrule and the inductor by circulating in the calibrated annular space separating the inductor of the ferrule. The water box, also playing the role of electrical connection panel, externally comprises the electrical terminals that connect the inductor to the external power supply.
Pour l'essentiel, et comme le montre la partie droite de la figure 1 jointe, une telle technologie connue d'un rouleau-brasseur se caractérise en somme par la coopération de deux sous-ensembles coaxiaux distincts, l'un libre en rotation axiale, l'autre fixe, et portés tous deux par les supports 4 de la virole 7 fixés au châssis 5 de la machine de coulée:  Essentially, and as shown in the right part of the attached FIG. 1, such a known technology of a brewer roller is characterized in sum by the cooperation of two distinct coaxial subassemblies, one free in axial rotation. the other fixed, and both carried by the supports 4 of the ferrule 7 fixed to the chassis 5 of the casting machine:
- un premier ensemble, fixe en rotation axiale, formé par l'inducteur central 8 dont les extensions terminales 12 viennent reposer sur des berceaux centreurs 14 qui le bloquent en rotation axiale et qui sont solidaires du châssis 5 de la machine de coulée par l'intermédiaire des éléments de support 4  - A first set, fixed in axial rotation, formed by the central inductor 8 whose terminal extensions 12 come to rest on centralized cradles 14 which block in axial rotation and which are integral with the frame 5 of the casting machine by the intermediate support elements 4
- et un second ensemble, mobile lui en rotation axiale, formé par la virole 1 destinée à venir en contact roulant avec la brame coulée 6 et par ses deux fusées tubulaires 2 qui la prolonge à chacune de ses d'extrémités pour venir tourillonner par leur petite base 13 dans des paliers à roulements 3 déportés montés sur les éléments support 4 fixés au châssis 5 de la machine.  - And a second assembly, movable in axial rotation thereof, formed by the ferrule 1 intended to come in rolling contact with the slab 6 and by its two tubular flares 2 which extends at each of its ends to be journalled by their small base 13 in bearings 3 remote bearings mounted on the support elements 4 fixed to the chassis 5 of the machine.
Par commodité, des boites à eau 16, servant également de panneau de connexion électrique 18 de l'inducteur, coiffent extérieurement les berceaux 14 de manière étanche.  For convenience, water boxes 16, also serving as an electrical connection panel 18 of the inductor, externally cap the cradles 14 sealingly.
Ce type de rouleau-brasseur, qui s'avère être parfaitement adapté à sa double fonction de support-brassage, est couramment utilisé pour la plupart des machines de coulée continue de brames de largeur standard, c'est à dire allant jusqu'à 1600-1700 mm environ, largeur à laquelle la virole soutenue par deux paliers d'extrémité est encore suffisamment rigide pour ne pas prendre une flèche rédhibitoire.  This type of brewer, which turns out to be perfectly adapted to its dual support-brewing function, is commonly used for most continuous slab casting machines of standard width, ie up to 1600 -1700 mm, width at which the ferrule supported by two end bearings is still rigid enough not to take a crippling arrow.
Ce type de rouleau-brasseur pourrait également être utilisé pour des brames très larges, à savoir supérieure à 2400 mm, moyennant alors la mise en place de deux demi- rouleaux avec palier à roulement intermédiaire, pour assurer à un tel ensemble sa rigidité et sa rectitude géométrique sous les contraintes thermomécaniques imposées par la présence à son contact d'une brame très large en cours de solidification (WO201 1/1 17479). En revanche, pour les brames de largeur intercalaire, disons de 2000 mm à +/- 20% (de 1600 à 2400 mm donc pour fixer les idées), cette technologie s'avère inapplicable. La présence des fusées d'extrémités rend la partie active de l'inducteur trop courte pour envisager la solution à deux demi-rouleaux avec palier intermédiaire, et la solution à rouleau unique sans palier intermédiaire entraînerait à coup sûr une flèche rédhibitoire, d'autant que la présence des fusées d'extrémités éloignent les points d'appui sur le châssis de la machine de coulée bien au delà de la simple distance nécessaire pour couvrir la brame sur toute sa largeur. A titre d'exemple, un rouleau-brasseur de 240 mm de diamètre monté à une distance de 3 m environ sous le niveau du métal coulé en lingotière dans une machine de coulée "standard" de 1600 mm de large prend, sous la force d'appui ferrostatique de la brame, une flèche inférieure à 1 mm, alors que dans une machine de 2000 mm de large, la flèche serait d'environ 4mm, ce qui est rédhibitoire. This type of stirring roll could also be used for very wide slabs, ie greater than 2400 mm, by means of the introduction of two half rollers with intermediate rolling bearing, to ensure such a set its rigidity and stability. geometric straightness under the thermomechanical constraints imposed by the presence at its contact of a very broad slab during solidification (WO201 1/1 17479). On the other hand, for slabs of interlayer width, say from 2000 mm to +/- 20% (from 1600 to 2400 mm, so to fix the ideas), this technology turns out to be inapplicable. The presence of the end flares makes the active part of the inductor too short to consider the solution with two half-rolls with intermediate bearing, and the single-roller solution without intermediate bearing would certainly lead to a crippling arrow, all the more so. that the presence of end flares removes the bearing points on the chassis of the casting machine well beyond the simple distance necessary to cover the slab across its entire width. By way of example, a stirring roll 240 mm in diameter mounted at a distance of about 3 m below the level of the mold cast metal in a "standard" casting machine 1600 mm wide takes, under the force of ferrostatic support of the slab, an arrow less than 1 mm, while in a machine 2000 mm wide, the arrow would be about 4mm, which is unacceptable.
Fort de ce constat, et tout en préservant l'intégralité des qualités fonctionnelles et opérationnelles des rouleaux brasseurs habituels, la présente invention a pour but de proposer une conception technologique de ceux-ci exempte de fusées d'extrémité afin de rigidifier la virole, de permettre une réalisation plus économique tant en coût d'acquisition que de fonctionnement et, de surcroit, de pouvoir couvrir tous les besoins en terme de largeur de brames, de 1600 mm (ou moins) à 2400 mm (et plus).  Bearing this in mind, and while preserving all the functional and operational qualities of the usual brew rollers, the present invention aims to provide a technological design thereof free of end rockets to stiffen the shell, to to allow a more economical realization as well in cost of acquisition as of operation and, in addition, to be able to cover all the requirements in term of width of slabs, from 1600 mm (or less) to 2400 mm (and more).
A cet effet, l'invention a pour objet un rouleau-brasseur pour une machine de coulée continue de produits métalliques de large section droite, tels une brame, comprenant : For this purpose, the subject of the invention is a stirring roll for a machine for continuous casting of large cross section metal products, such as a slab, comprising:
- (a) au moins une virole externe en acier amagnétique en rotation axiale destinée à venir au contact avec la surface d'une grande face de la brame coulée, - (a) at least one outer ring made of non-magnetic steel in axial rotation intended to come into contact with the surface of a large face of the cast slab,
"- (b) des organes de liaison mécanique assurant le support de la virole en la laissant libre en rotation axiale, "- (b) of the mechanical connecting parts providing said support the shell leaving it free in axial rotation,
- (c) des éléments support du rouleau brasseur déportés de part et d'autre au delà des limites de la virole et fixés au châssis de la machine de coulée,  - (c) support elements of the mixing roll offset on both sides beyond the limits of the ferrule and fixed to the frame of the casting machine,
- (d) un équipement électromagnétique interne constitué par au moins un inducteur linéaire polyphasé à champ magnétique glissant, monté coaxialement avec la virole de manière à ménager entre eux un espace annulaire pour la circulation d'un liquide de refroidissement, ledit équipement constituant un arbre axial pourvu d'extensions terminales creuses qui viennent en appui bloqué en rotation axiale sur lesdits éléments support, et - (d) an internal electromagnetic equipment consisting of at least one polyphase linear magnetic field inductor sliding, coaxially mounted with the ferrule so as to provide between them an annular space for the circulation of a cooling liquid, said equipment constituting a tree axial end provided with hollow end extensions which come into support blocked in axial rotation on said support elements, and
- (e) des boîtiers d'entrée/sortie du liquide de refroidissement pourvus de bornes de connexions électriques et montés aux extrémités des extensions terminales de l'inducteur au delà desdits éléments support; - (e) coolant inlet / outlet housings provided with electrical connection terminals and mounted at the ends of the inductor terminal extensions beyond said support members;
rouleau-brasseur caractérisé en ce que la virole porte sur lesdites extensions terminales de l'inducteur par l'intermédiaire desdits des organes de liaison mécanique constitués par des roulements interposés entre la virole et lesdites extensions terminales (de préférence aux extrémités de la virole). Comme on l'aura compris, l'idée à la base de l'invention est de faire jouer à l'inducteur la fonction de support de la virole qui tourne à faible distance autour de lui. Pour cela, les paliers à roulement de la virole, ou plus généralement ses organes de liaison mécanique la laissant en rotation axiale libre, sont séparés de leurs éléments support traditionnels solidaires de la structure de la machine de coulée. De la sorte, on réserve à ces derniers la réception exclusive des extensions terminales de l'inducteur, alors que les paliers à roulements nécessaires au support de la virole libre en rotation axiale, deviennent dès lors que de simples roulements montés sur ces extensions terminales de l'inducteur. stirring roll characterized in that the ferrule carries on said terminal extensions of the inductor via said mechanical connecting members constituted by bearings interposed between the ferrule and said end extensions (preferably at the ends of the ferrule). As will be understood, the idea underlying the invention is to make the inductor play the support function of the ferrule which rotates at a short distance around it. For this, rolling bearings of the ferrule, or more generally its mechanical connecting members leaving it in free axial rotation, are separated from their traditional support elements integral with the structure of the casting machine. In this way, the latter is reserved for the exclusive reception of the terminal extensions of the inductor, whereas the rolling bearings necessary for supporting the free ferrule in axial rotation become, therefore, only simple bearings mounted on these terminal extensions of the rotor. the inductor.
Parmi les principaux avantages propres à la technologie des rouleaux brasseurs conforme à l'invention, et qui seront listés plus en détail dans la suite, on pourra déjà retenir la suppression, en tous cas une forte diminution, du phénomène de "rotulage" des roulements dans les paliers, puisque ceux-ci ont disparus.  Among the main advantages specific to the technology of the stirrer rollers according to the invention, and which will be listed in more detail below, it will be possible to retain the suppression, in any case a sharp decrease, of the phenomenon of "swiveling" of the bearings in the bearings, since these have disappeared.
La conception technologique selon l'invention ouvre par ailleurs des possibilités particulièrement attractives pour une réalisation simplifiée de rouleaux brasseurs extra- longs destinés, comme déjà souligné, aux machines de coulée de brames larges (plus de 1600 mm) dont la tendance se confirme de plus en plus au sein de la sidérurgie mondiale poussée par les exigences de productivité sans cesse croissante des aciéries.  The technological design according to the invention also opens up particularly attractive possibilities for a simplified embodiment of extra-long stirring rollers intended, as already pointed out, for large slab casting machines (over 1600 mm) whose trend is confirmed moreover. in addition to the global steel industry pushed by the requirements of ever increasing productivity of steel mills.
On sait en effet que des rouleaux tubulaires de grande longueur unitaire peuvent prendre une flèche rédhibitoire sous la pression ferrostatique de la brame en appui sur eux. Pour apporter une solution à ce problème, conformément à une autre forme de réalisation de l'invention, avantageusement applicable donc à la coulée de brames larges, un tel rouleau-brasseur extra-long (que l'on dénommera par la suite "rouleau brasseur divisé") comprend en fait, non plus une, mais deux viroles alignées distinctes. Ces deux viroles sont de préférence de même longueur, et dotées de deux roulements supplémentaires intermédiaires qui portent sur une extension intermédiaire centrale de l'ossature axiale de l'inducteur. Cette extension intermédiaire est, elle même, soutenue par un support central complémentaire fixé au châssis de la machine de coulée.  It is known that tubular rollers of great unit length can take a crippling arrow under the ferrostatic pressure of the slab resting on them. To provide a solution to this problem, in accordance with another embodiment of the invention, advantageously applicable therefore to the casting of wide slabs, such extra-long brewer-roll (which will be called thereafter "brewer roll" divided ") comprises in fact no longer one, but two distinct aligned ferrules. These two ferrules are preferably of the same length, and provided with two additional intermediate bearings which bear on a central intermediate extension of the axial framework of the inductor. This intermediate extension is itself supported by a complementary central support fixed to the chassis of the casting machine.
On notera qu'un avantage propre à cette variante est la compacité de la zone palière centrale du rouleau brasseur divisé, compacité impossible à réaliser avec des fusées d'extrémités et qui conduit naturellement à un soutien mécanique plus étendu, donc meilleur, de la brame coulée dans la région centrale de ses grandes faces.  It should be noted that a particular advantage of this variant is the compactness of the central landing zone of the divided brewing roll, a compactness impossible to achieve with end flares and which naturally leads to a wider, and therefore better, mechanical support of the slab. cast in the central region of its large faces.
Un autre intérêt du rouleau brasseur divisé est d'ordre opérationnel: dans le cas des brames très large, disons au delà de 2 000 mm, on pourra assembler sur une même ossature axiale d'inducteur au sein du même rouleau-brasseur deux inducteurs, électriquement et magnétiquement indépendamment l'un de l'autre, tout en aménageant un support central fixé au châssis de la machine.  Another advantage of the divided baffle roll is of operational order: in the case of very wide slabs, say beyond 2000 mm, it will be possible to assemble on the same axial inductor framework within the same brewer two inductors, electrically and magnetically independently of each other, while providing a central support fixed to the frame of the machine.
Dans toutes ses formes de réalisation, le rouleau brasseur selon l'invention, par rapport au rouleaux brasseurs traditionnels connus, s'exprime par le fait que les paliers à roulements d'extrémité ainsi que les fusées ont été supprimés et remplacés par des simples supports d'un arbre fixe non tournant représenté par les extensions terminales de l'inducteur et que la virole tourne autour de cet arbre fixe en portant sur ce dernier par l'intermédiaire de roulements qui la tiennent. In all its embodiments, the brewing roll according to the invention, compared to known traditional brewing rollers, is expressed by the fact that the end bearing bearings and the rockets have been removed and replaced by simple supports of a non-rotating fixed shaft represented by the terminal extensions of the inductor and that the shell rotates around this fixed shaft bearing on the latter by means of bearings that hold it.
Cette disposition conduit à une forte diminution de la distance séparant les supports fixes du rouleau brasseur, donc à une réduction corrélative de la flèche que prend la virole en fonctionnement, d'où une réduction, voire une disparition du phénomène de rotulage.  This arrangement leads to a sharp decrease in the distance separating the fixed supports of the stirring roller, therefore to a corresponding reduction in the deflection that the ferrule takes in operation, hence reducing or even disappearing the swiveling phenomenon.
En outre, les efforts qu'imprime la virole sur ses organes de liaison ne se transmettent plus par des fusées, nécessairement tubulaires, donc déformables, mais s'appliquent directement à un arbre central qui peut être dimensionné comme on le souhaite pour éviter toute déformation. Par ailleurs, transposée aux roulements intermédiaires dans la version du rouleau brasseur divisé, cette disposition assure un encombrement minimisé entre les deux viroles, donc une continuité de support maximisé de la brame sur sa largeur.  In addition, the forces that print the ferrule on its connecting members are not transmitted by rockets, necessarily tubular, so deformable, but apply directly to a central shaft that can be sized as desired to avoid any deformation . Furthermore, transposed to the intermediate bearings in the split baffle roll version, this arrangement ensures a minimized space between the two rings, so a maximized support continuity of the slab over its width.
L'invention sera bien comprise et d'autres aspects et avantages apparaîtront plus clairement au vu de la description qui suit donnant un exemple de réalisation des rouleaux brasseurs selon l'invention en référence aux planches de figures jointes sur lesquelles: The invention will be better understood and other aspects and advantages will become more clearly apparent from the following description giving an embodiment of the stirring rollers according to the invention with reference to the attached figure plates on which:
- la figure 1 est une représentation pédagogique, selon une vue en coupe axiale, d'un rouleau brasseur volontairement hybride pour faciliter la comparaison avec l'art antérieur, en ce sens que son extrémité de gauche (sur la figure) est réalisée avec la technologie selon l'invention, alors que son extrémité de droite est montrée dans sa forme de réalisation habituelle connue; FIG. 1 is a pedagogical representation, according to an axial sectional view, of a deliberately hybrid brewing roll to facilitate comparison with the prior art, in that its left end (in the figure) is made with the technology according to the invention, while its right end is shown in its usual known embodiment;
- la figure 2 est une vue en coupe axiale d'un rouleau brasseur dans sa version de base à virole unique (donc sans support central);  - Figure 2 is an axial sectional view of a stirrer roll in its basic version with a single shell (thus without central support);
- la figure 3 est une vue en coupe axiale d'une variante de réalisation à double virole et support central, baptisée "rouleau brasseur divisé"  - Figure 3 is an axial sectional view of an alternative embodiment with double ferrule and central support, called "split brewer roller"
En se reportant d'abord, pour mémoire, à la partie droite de la figure 1 , on voit qu'un rouleau brasseur classique est essentiellement formé par un corps tubulaire allongé tournant autour de son axe principal de symétrie A-A. Ce corps est constitué par une enveloppe, ou virole, 1 en acier inoxydable amagnétique et par des fusées tronconiques 2 qui maintiennent cette virole à ses deux extrémités, la petite base 2a de chaque fusée étant engagée dans un palier à roulement 3' intégré à un support 4 solidaire du châssis rigide 5 de la machine de coulée continue.  Referring first, for the record, to the right side of Figure 1, we see that a conventional brewing roller is essentially formed by an elongated tubular body rotating about its main axis of symmetry A-A. This body is constituted by a shell, or ferrule, 1 nonmagnetic stainless steel and frustoconical flares 2 which maintain this ferrule at both ends, the small base 2a of each rocket being engaged in a rolling bearing 3 'integrated in a support 4 secured to the rigid frame 5 of the continuous casting machine.
Cette machine de coulée permet de couler des brames métalliques 6 qui progressent depuis une lingotière en position haute jusqu'à l'outil de découpe à longueur au bas de la machine. Dans le même temps, s'opère progressivement la solidification complète du métal en fusion depuis la périphérie du produit coulé 6 sous l'effet d'un refroidissement intense de sa surface, par contact avec les parois internes de la lingotière, puis par arrosage direct d'eau dans les étages du refroidissement secondaire de la machine de coulée, là où précisément se trouvent les rouleaux brasseurs des machines qui en sont équipées. C'est à cet endroit en effet que la brame coulée est maintenue et guidée dans son lent déplacement vers le bas par des rouleaux d'appui tournants qui viennent, par une génératrice constamment renouvelée au cours de la rotation, au contact appuyé sur chacune des grandes faces de la brame, telle la grande face 7 sur la figure. This casting machine makes it possible to cast metal slabs 6 which progress from a mold in the high position to the cutting tool at the bottom of the machine. At the same time, progressively solidification of the molten metal from the periphery of the cast product 6 under the effect of intense cooling of its surface, by contact with the inner walls of the mold, then by direct watering of water in the stages of the secondary cooling of the casting machine, where precisely there are the brewing rollers of the machines which are equipped with them. It is here that the cast slab is held and guided in its slow downward movement by rotating support rollers that come, by a generator constantly renewed during the rotation, contact pressed each of large faces of the slab, such as the large face 7 in the figure.
Comme on le voit, le volume disponible à l'intérieur de la virole 1 est quasiment intégralement occupé par un inducteur électromagnétique 8 destiné à permettre une mise en mouvement contrôlé du métal encore en fusion au sein de la brame 6. A cet effet, l'inducteur 8, du type linéaire polyphasé, comporte une carcasse magnétique 9 qui sert de support d'enroulement aux bobinages de phase 10 qui se succèdent le long de l'inducteur de manière à pouvoir générer un champ magnétique, globalement dirigé perpendiculairement aux grandes faces de la brame 6, mais mobile, à savoir glissant le long de l'axe A-A de l'inducteur lorsque ces bobinages 10 sont correctement connectées aux bornes d'une alimentation polyphasée externe (diphasée ou triphasée) non représentée.  As can be seen, the volume available inside the shell 1 is almost entirely occupied by an electromagnetic inductor 8 intended to allow controlled movement of the metal still molten within the slab 6. For this purpose, the inductor 8, of the polyphase linear type, comprises a magnetic carcass 9 which serves as a winding support for the phase windings 10 which follow one another along the inductor so as to be able to generate a magnetic field, generally directed perpendicularly to the large faces slab 6, but mobile, namely sliding along the axis AA of the inductor when these coils 10 are properly connected to the terminals of an external polyphase supply (two-phase or three-phase) not shown.
Cet inducteur 8 est, lui aussi, un corps de symétrie axiale sur son axe longitudinal qui se confond avec celui A-A de la virole ] afin de pouvoir être bien centré sur cette dernière en ménageant entre eux un espace annulaire 1 1 pour la circulation d'un fluide de refroidissement qui assurera le maintien thermique du rouleau brasseur en fonctionnement. Ce centrage axial est réalisé à l'aide d'extensions terminales cylindriques 12 de l'inducteur de diamètre réduit afin de pouvoir s'engager avec un simple jeu fonctionnel dans la petite base 2a de la fusée 2 et dépasser des limites de celle-ci au delà du palier 3 par une portée 13 qui sert au clavetage pour bloquer l'inducteur en rotation axiale au niveau d'une plaque de bout 14 pourvue des clavettes nécessaires. Chaque extension terminale 12, qui est creuse (canal axial 24) et pourvue de conduites radiales 15 de communication avec l'espace annulaire 1 1 , débouche dans une boîte à eau 16 montée étanche en extrémité sur la plaque de bout 14 et pourvue d'une tubulure 17 d'entrée ou de sortie de l'eau de refroidissement (de sortie sur la figure).  This inductor 8 is, too, a body of axial symmetry on its longitudinal axis which merges with that AA of the ferrule] in order to be well centered on the latter by providing between them an annular space 1 1 for the circulation of a cooling fluid which will ensure the thermal maintenance of the stirrer roll in operation. This axial centering is achieved by means of cylindrical end extensions 12 of the reduced diameter inductor so as to be able to engage with a simple functional play in the small base 2a of the rocket 2 and to exceed the limits thereof. beyond the bearing 3 by a bearing 13 which serves for keying to lock the inductor in axial rotation at an end plate 14 provided with the necessary keys. Each end extension 12, which is hollow (axial channel 24) and provided with radial ducts 15 in communication with the annular space 1 1, opens into a water box 16 mounted at the end end on the end plate 14 and provided with a tubing 17 for entering or leaving the cooling water (outlet in the figure).
On voit que la boîte à eau 16 sert également de tableau à bornes de connexion 18 de l'inducteur 8 à une alimentation électrique polyphasée externe, les fils de liaison 19 de l'inducteur passant dans le creux axial de son extension 12 pour rejoindre les bornes 18.  It can be seen that the water box 16 also serves as a connection terminal board 18 of the inductor 8 to an external polyphase electrical supply, the connection wires 19 of the inductor passing through the axial recess of its extension 12 to join the terminals 18.
En se reportant maintenant indifféremment sur la figure 2 ou sur la partie gauche de la figure 1 , on voit que le rouleau brasseur selon l'invention (dont les éléments constitutifs identiques à ceux du rouleau brasseur connu que l'on vient de voir sont désignés par des références identiques) se distingue de la technologie classique connue par le fait que le palier à roulement 3' ainsi que la fusée à chaque extrémité du rouleau sont supprimés. Cette singularité permet de libérer de la place à l'extension terminale 20 de l'inducteur 8 qui vient alors reposer en appui, bloqué en rotation par une cale 31 , dans le berceau formé par ce support fixe 4.  Referring now indifferently to FIG. 2 or to the left-hand part of FIG. 1, it can be seen that the stirring roll according to the invention (whose constituent elements identical to those of the known stirring roll just described are designated by identical references) is distinguished from the known conventional technology by the fact that the rolling bearing 3 'and the rocket at each end of the roll are removed. This singularity makes it possible to free up space at the terminal extension 20 of the inductor 8 which then rests in support, locked in rotation by a shim 31, in the cradle formed by this fixed support 4.
Comme on le voit, mais sans qu'il s'agisse d'une nécessité, cette extension 20 est prévue plus massive, avec un diamètre plus important que celui de l'extension analogue 12 du rouleau brasseur classique (partie droite de la figure), ce afin de renforcer au besoin sa résistance mécanique, puisqu'elle va être sur ce point plus sollicitée, comme on va le comprendre maintenant. As can be seen, but without being a necessity, this extension 20 is provided more massive, with a greater diameter than that of the similar extension 12 conventional brewer roller (right part of the figure), in order to strengthen if necessary its mechanical strength, since it will be on this point more solicited, as will be understood now.
En effet, d'une part, des roulements 3 remplacent à eux seuls les fusées d'extrémité de la virole 1 (qui sont donc éliminées) dans leur fonction de maintien et d'entraînement en rotation de celle-ci et, d'autre part, ces roulements 3 viennent porter directement sur l'extension terminale 20 de l'inducteur qui sert ainsi de support à la virole 1.  Indeed, on the one hand, bearings 3 alone replace the end rockets of the shell 1 (which are eliminated) in their function of maintaining and rotating the latter and, on the other hand On the other hand, these bearings 3 come directly on the terminal extension 20 of the inductor, which thus serves as support for the shell 1.
Il est à noter que grâce à la suppression des fusées d'extrémités, la distance qui éloigne les supports fixes 4 entre eux se trouve ainsi réduite de 25 à 40 cm selon les cas par rapport à la technologie connue, soit près de 20% de la longueur du rouleau brasseur.  It should be noted that by removing the end flares, the distance that removes the fixed supports 4 between them is thus reduced by 25 to 40 cm depending on the case compared to the known technology, or nearly 20% of the length of the brewer roll.
Un roulement 3 sera ainsi fixé à chaque extrémité de la virole. Cette fixation peut être assurée, de manière connue en soi, par une couronne boulonnée non représentée sur les figures pour ne pas les surcharger inutilement. De même, on aura avantage à prévoir une joue annulaire 32 montée en bout de virole pour servir de plaque de graissage des roulements 3 et qui vient coiffer ces roulements pour les protéger des poussières et améliorer l'étanchéité de l'ensemble.  A bearing 3 will be fixed at each end of the ferrule. This attachment can be provided, in a manner known per se, by a bolted crown not shown in the figures so as not to overload them unnecessarily. Similarly, it will be advantageous to provide an annular cheek 32 mounted at the end of the ferrule to serve as a grease plate of the bearings 3 and which caps these bearings to protect them from dust and improve the tightness of the assembly.
On aura cependant avantage, comme déjà dit au début, d'opter, au moins à l'une des deux extrémités, sinon aux deux, pour une cage à roulements qui soit de conception mécanique "ouvrable" afin de faciliter le montage de l'inducteur 8 à l'intérieur de la virole 1 en atelier.  However, it will be advantageous, as already said at the beginning, to opt for at least one of the two ends, if not both, for a rolling cage which is of mechanical design "openable" to facilitate the assembly of the inductor 8 inside the ferrule 1 in the workshop.
La figure 3 illustre la variante technologie de l'invention appliquée au cas où le rouleau brasseur est, non plus à virole unique s'étendant sur toute la largeur de la brame coulée, mais à deux demi viroles la et l b.  FIG. 3 illustrates the technological variant of the invention applied in the case where the stirring roll is no longer with a single ferrule extending over the entire width of the cast slab, but with two half-ferrules 1a and 1b.
Ces deux demi viroles, colinéaires, sont tenues à leur extrémités rapprochées par des roulements intermédiaires 3c et 3d et sont éloignées l'une de l'autre d'une courte distance (disons entre 10 et 20 cm) imposée par la présence entre elles d'une extension intermédiaire 20c de l'inducteur. Comme les roulements d'extrémité 3a et 3b portent sur les extensions terminales 20a 20b de l'inducteur, les roulements intermédiaires 3c et 3d portent sur l'extension intermédiaire 20c de l'inducteur, lequel à cet effet, est exempt de bobinages électriques et porte sur un support central 21 fixé au châssis 5 de la machine de coulée.  These two half-collinear ferrules are held at their close ends by intermediate bearings 3c and 3d and are separated from each other a short distance (say between 10 and 20 cm) imposed by the presence between them. an intermediate extension 20c of the inductor. As the end bearings 3a and 3b bear on the terminal extensions 20a and 20b of the inductor, the intermediate bearings 3c and 3d relate to the intermediate extension 20c of the inductor, which for this purpose is free of electrical windings and door on a central support 21 fixed to the chassis 5 of the casting machine.
Comme déjà dit, un tel rouleau brasseur, que l'on qualifiera de "divisé" pour une raison qui découle à l'évidence de ce qui vient d'être dit, et formé en fait par deux demi- viroles notées la et l b, constitue une réponse adéquate au besoin croissant, dans le monde de la sidérurgie en tous cas, de pouvoir couler en continu des brames de plus en plus larges, dépassant aisément la limite des rouleaux brasseurs conventionnels de 1.6/1.7 m, voire les 2,4 m de large et même davantage dans un avenir sans doute proche, car ce rouleau divisé est protégé contre une flèche rédhibitoire par le support central 21 . Les extensions terminales de l'inducteur 20a ou 20b, situées aux extrémités du rouleau, sont creuses afin de pouvoir déboucher, As already said, such a brewing roll, which will be described as "divided" for a reason that obviously follows from what has just been said, and actually formed by two half-rings marked la and lb, is an adequate response to the growing need, in the world of iron and steel in any case, to be able to continuously cast larger slabs, easily exceeding the limit of conventional brewing rollers of 1.6 / 1.7 m or 2.4 m wide and even more in the future probably close, because this divided roller is protected against a crippling arrow by the central support 21. The terminal extensions of the inductor 20a or 20b, located at the ends of the roll, are hollow in order to be able to open,
- d'un coté, par leur extrémité libre, dans une boîte à eau étanche 16a ou 16b, pourvue d'une tubulure d'entrée/sortie de l'eau 17a ou 17b et dont le panneau à bornes 18a ou 18b forme une des parois (la paroi frontale sur la figure),  - On one side, by their free end, in a sealed water box 16a or 16b, provided with a water inlet / outlet pipe 17a or 17b and whose terminal panel 18a or 18b forms one of walls (the front wall in the figure),
- et de l'autre coté, dans l'espace annulaire 1 la ou 1 1b, ménagé entre chaque demi-virole l a ou lb et l'inducteur 8 par l'intermédiaire de conduites forées radiales 15a ou 15b.  and on the other side, in the annular space 1 or 1 1b, formed between each half-shell 1a or 1b and the inductor 8 via radial drilled ducts 15a or 15b.
L'extension intermédiaire 20c est également creuse et pourvue de conduites forées radiales 15c. 15d afin de constituer un conduit central étanche de communication entre les deux espaces annulaires 1 1 a et 1 1 b.  The intermediate extension 20c is also hollow and provided with radial drilled lines 15c. 15d in order to form a central leaktight conduit for communication between the two annular spaces 11a and 11b.
Le refroidissement des demi- viroles l a et l b et de l'inducteur 8 est ainsi assuré par un circuit d'eau commun, comportant les éléments suivants, pris dans un ordre correspondant au sens de circulation du fluide de refroidissement, de la gauche vers la droite sur la figure 3 :  The cooling of the half-rings 1a and 1b and of the inductor 8 is thus ensured by a common water circuit, comprising the following elements, taken in an order corresponding to the direction of circulation of the cooling fluid, from the left to the right in Figure 3:
la boite d'alimentation en eau 16a dans laquelle l'eau de refroidissement pénètre par la tubulure d'amenée 17a reliée à une source d'eau sous pression non représentée; the water supply box 16a in which the cooling water enters through the supply pipe 17a connected to a source of water under pressure not shown;
le passage axial 24a de l'extension terminale externe gauche 20a de l'inducteur 8 avec ses conduites radiales 15a qui débouchent à l'extrémité de l'espace annulaire 1 la; the axial passage 24a of the left external terminal extension 20a of the inductor 8 with its radial ducts 15a which open at the end of the annular space 1a;
ledit espace annulaire l ia ménagé entre la demi-virole l a et l'inducteur concentrique 8 pour être apte à assurer une circulation d'eau au voisinage de la demi-virole l a et la refroidir pendant et après son contact avec la brame chaude 6 ainsi que de refroidir la partie gauche de l'inducteur 8; said annular space l ia formed between the half-ferrule la and the concentric inductor 8 to be able to ensure a circulation of water in the vicinity of the half-ferrule la and cool during and after its contact with the hot slab 6 and than to cool the left part of the inductor 8;
les conduites radiales forées 15c, le passage axial 26 et les conduites radiales forées 15d de l'extension intermédiaire 20c de l'inducteur qui mettent en communication l'espace annulaire 1 l a avec l'espace 1 lb; the drilled radial ducts 15c, the axial passage 26 and the drilled radial ducts 15d of the intermediate extension 20c of the inductor which put the annular space 11a into communication with the space 1b;
ledit espace annulaire 1 lb ménagé entre la demi-virole l b et l'inducteur 8 pour être apte à assurer une circulation d'eau au voisinage de la périphérie de la demi-virole l b et la refroidir pendant et après son contact avec la brame chaude 6 ainsi que de refroidir la partie droite de l'inducteur 8; said annular space 1 lb formed between the half-shell 1b and the inductor 8 to be able to ensure a circulation of water in the vicinity of the periphery of the half-shell 1b and to cool during and after its contact with the hot slab 6 as well as to cool the right part of the inductor 8;
les conduites radiales forées 15b et le passage axial 24b de l'extension externe droite 20b de l'inducteur qui débouche dans la boite d'évacuation de l'eau 16b  the drilled radial ducts 15b and the axial passage 24b of the right external extension 20b of the inductor which opens into the water discharge box 16b
et la boite d'évacuation de l'eau 16b pourvue d'une tubulure de sortie 17b pour la récupération en boucle de l'eau de refroidissement. and the water discharge box 16b provided with an outlet pipe 17b for the loop recovery of the cooling water.
L'extension intermédiaire 20c de l'inducteur implique, bien entendu, que les bobinages électriques 10 soient écartées à cet endroit, mais la continuité mécanique entre la partie gauche et droite de l'inducteur est assurée par cette extension qui peut être en acier, ou dans le même matériau que l'ossature axiale de l'inducteur.  The intermediate extension 20c of the inductor implies, of course, that the electric windings 10 are spaced at this location, but the mechanical continuity between the left and right part of the inductor is provided by this extension which may be steel, or in the same material as the axial framework of the inductor.
Conformément à une forme de réalisation de l'invention montrée sur la figure 3, ce rouleau brasseur divisé peut comporter deux inducteurs électromagnétiques distincts et séparés, un dans chaque demi virole: un inducteur 8a dans la demi virole de gauche l a et un inducteur 8b dans la demi virole de droite l b. Sont représentés ici, et conformément à une variante de réalisation préférée de l'invention, des inducteurs identiques 8a et 8b entre eux et semblables à l'inducteur unique 8 de la figure 1 ou 2. According to one embodiment of the invention shown in FIG. 3, this divided stirring roll may comprise two distinct electromagnetic inductors and separated, one in each half shell: an inductor 8a in the left half shell and an inductor 8b in the right half shell 1b. Are represented here, and according to a preferred embodiment of the invention, identical inductors 8a and 8b them and similar to the single inductor 8 of Figure 1 or 2.
Ces inducteurs peuvent être rendus mécaniquement solidaires par l'extension intermédiaire 20c ou séparables par exemple pour faciliter le montage, mais se réunissant au niveau du support central 21. Comme le montre la figure, un simple emboîtement de type "male-femelle" à cet égard sera suffisant pour assurer la liaison mécanique des deux inducteurs.  These inductors can be rendered mechanically integral by the intermediate extension 20c or separable for example to facilitate assembly, but meeting at the central support 21. As shown in the figure, a simple interlocking type "male-female" to this regard will be sufficient to ensure the mechanical connection of the two inductors.
On aura cependant compris qu'une telle réunion mécanique entre les deux inducteurs 8a et 8b est nécessaire uniquement pour former une prise sur le support central 21 , lorsque celui-ci est unique. On pourrait fort bien, en effet, retenir, à l'inverse, l'option dans laquelle chaque inducteur comporte à son extrémité intérieure son propre support central. Dans un tel cas, deux supports centraux viendraient donc se juxtaposer l'un à coté de l'autre, portés chacun par le châssis de la machine de coulée. Dans ce cas, il faudra cependant prévoir une jonction, même souple mais étanche, entre ces deux inducteurs accouplés pour permettre la circulation de l'eau de refroidissement.  It will however be understood that such a mechanical meeting between the two inductors 8a and 8b is necessary only to form a catch on the central support 21, when it is unique. One could very well, in fact, retain, conversely, the option in which each inductor has at its inner end its own central support. In such a case, two central supports would then juxtapose one next to the other, each carried by the chassis of the casting machine. In this case, however, it will be necessary to provide a junction, even flexible but sealed, between these two inductors coupled to allow the circulation of cooling water.
Un autre aspect, qui pourrait représenter un inconvénient de cette variante, est que l'éloignement entre les deux demi-viroles serait corrélativement plus grand et, avec cet éloignement, aussi la fraction de la largeur de la brame coulée 6 laissée libre de tout soutien mécanique et non refroidie dans une zone "morte" au niveau des paliers intermédiaires. On pourrait toutefois atténuer les effets induits non souhaités sur la brame en prévoyant des jeux de demi-viroles de longueurs variables mais différentes sur un même rouleau. On décalerait ce cette manière, selon des principes déjà bien connus, les zones "mortes" sur la largeur de la brame coulée d'un rouleau à l'autre sur la hauteur de la machine de coulée, afin de tendre à homogénéiser globalement la perturbation après quelques mètres de progression de la brame dans la direction de la coulée.  Another aspect, which could be a disadvantage of this variant, is that the distance between the two half-rings would be correlatively greater and, with this distance, also the fraction of the width of the cast slab 6 left free of any support mechanically and uncooled in a "dead" zone at the intermediate bearings. However, unwanted induced effects on the slab could be mitigated by providing sets of half-rings of varying lengths on the same roll. This would be shifted in this way, according to already well-known principles, the "dead" zones over the width of the slab cast from one roll to another over the height of the casting machine, in order to tend to homogenize the overall disruption after a few meters of progression of the slab in the direction of the casting.
On aura cependant compris que, quelque soit la variante de réalisation retenue pour la zone du support central 21 , on dispose d'un rouleau brasseur constitué de deux demi- rouleaux à deux inducteurs distincts 8a et 8b générant des champs magnétiques glissants qui peuvent être réglés indépendamment l'un de l'autre, tant en puissance qu'en sens de glissement le long de l'axe des inducteurs pour peu que l'on dispose de deux alimentations électriques, ou d'une alimentation unique apte à pouvoir alimenter séparément chaque inducteur. C'est pour cela d'ailleurs que l'on réservera de préférence, pour des raisons pratiques, à un inducteur donné, 8a ou 8b, le panneau à bornes de connexion électrique qui lui est le plus proche, respectivement 18a et 18b.  However, it will have been understood that, whatever the embodiment chosen for the zone of the central support 21, there is a stirring roll consisting of two half-rollers with two separate inductors 8a and 8b generating sliding magnetic fields that can be adjusted independently of each other, both in power and direction of sliding along the axis of the inductors provided that there are two power supplies, or a single power supply able to feed separately each inductor. It is for this reason that we will preferably reserve, for practical reasons, a given inductor, 8a or 8b, the electrical connection terminal panel which is closest to it, respectively 18a and 18b.
Pour une meilleure clarté de l'exposé, il convient sans doute de rappeler maintenant que les inducteurs 8a et 8b étant de type linéaire polyphasés (triphasés ou plus habituellement biphasés), chacun d'eux nécessite autant de paires de bornes de connexion que de phases de son alimentation électrique: deux paires pour un biphasé, trois paires pour un triphasé (étant néanmoins remarqué que dans le cas d'un montage électrique de l'inducteur "sans neutre sortie", son nombre de bornes sera trois pour un biphasé et trois pour un triphasé). For a better clarity of the presentation, it should probably be remembered now that the inductors 8a and 8b are linear type polyphase (three phase or more usually two-phase), each of them requires as many pairs of connection terminals than phases of its power supply: two pairs for a two-phase, three pairs for a three-phase (nevertheless being noted that in the case of an electrical installation of the inductor "without neutral output", its number of terminals will be three for one two-phase and three for three-phase).
Un inducteur de ce type produit un champ magnétique dont les lignes de forces sont globalement orientées perpendiculairement à l'axe longitudinal A-A de l'inducteur et mobile, car on peut le faire glisser le long de cet axe dans un sens ou dans l'autre par simple inversion de phase de l'alimentation électrique. On comprend donc que si l'on dispose de deux alimentations électriques, ou ce qui revient au même, d'une alimentation dédoublable, on peut régler les champs glissants sur les deux inducteurs 8a et 8b d'un même rouleau brasseur indépendamment l'un de l'autre, ce qui ouvre des perspectives particulièrement intéressantes quant aux possibilités de mise en mouvement du métal en fusion au sein de la brame en cours de coulée.  An inductor of this type produces a magnetic field whose force lines are generally oriented perpendicular to the longitudinal axis AA of the inductor and mobile, because it can be dragged along this axis in one direction or the other by simple phase reversal of the power supply. It is thus understood that if one has two power supplies, or what amounts to the same, a split power supply, one can adjust the sliding fields on the two inductors 8a and 8b of the same brewer roller independently one on the other, which opens particularly interesting perspectives as to the possibilities of moving the molten metal within the slab during casting.
On notera qu'un tel rouleau-brasseur divisé à deux inducteurs distincts ne se distingue pas visuellement d'un rouleau-brasseur à inducteur unique. Simplement, chaque inducteur doit avoir le set complet de bobinages permettant de générer un champ magnétique glissant (minimum quatre pour inducteur biphasé et six pour inducteur triphasé), alors que l'inducteur unique repartit, lui, son set de bobinages entre la partie gauche et droite, ce qui peut par exemple permettre d'augmenter le nombre de paires de pôles par phase.  It should be noted that such a divided brewer with two separate inductors is not visually distinguishable from a single inductor stirrer. Simply, each inductor must have the complete set of windings to generate a sliding magnetic field (minimum four for two-phase inductor and six for three-phase inductor), while the single inductor leaves him, his set of coils between the left and right, which can for example increase the number of pairs of poles per phase.
D'autre part, les connexions des bobinages d'un inducteur aux phases de l'alimentation électrique seront tous dirigés, de préférence, vers le même panneau de connexion électrique présent à une extrémité du rouleau et les connexions de l'autre inducteur seront dirigés tous vers l'autre panneau de connexion monté à l'autre extrémité du rouleau (ici les connexions 18a vers le panneau le plus proche 19a et les connexions 18b vers le panneau 19b), alors qu'avec un inducteur unique, la moitié des connexions peut être regroupée à gauche et l'autre moitié à droite.  On the other hand, the connections of the coils of an inductor to the phases of the power supply will all be directed, preferably, to the same electrical connection panel present at one end of the roller and the connections of the other inductor will be directed all to the other connection panel mounted at the other end of the roll (here the connections 18a to the nearest panel 19a and the connections 18b to the panel 19b), whereas with a single inductor, half of the connections can be grouped on the left and the other half on the right.
On aura compris que ni dans le cas d'un rouleau brasseur divisé à inducteur unique (fig.2), ni dans le cas à deux inducteurs distincts (fig.3), il est nécessaire de prévoir des connexions à travers l'extension intermédiaire centrale 20c de l'inducteur, ce qui compliquerait sinon la conception et le montage de l'installation.  It will have been understood that neither in the case of a split baffle with a single inductor (FIG. 2), nor in the case of two separate inductors (FIG. 3), it is necessary to provide connections through the intermediate extension. central 20c of the inductor, which would complicate otherwise the design and assembly of the installation.
Les rouleaux brasseurs selon l'invention, dans leur forme de réalisation sans support central 21 , peuvent être intégrés sans difficultés particulières à un segment de la structure de la machine de coulée portant d'autres rouleaux habituels de soutien et de guidage de la brame. Ceci est vrai également pour des rouleaux brasseurs divisés selon l'invention, car les rouleaux habituels de soutien sont, eux, également pourvus de paliers intermédiaires ou de supports intermédiaires dans les cas de machines larges et la structure des segments est déjà conçue avec des châssis pour supports centraux. On aura compris de cette observation que les rouleaux brasseurs non divisés à virole unique, donc sans support central, conformément à une réalisation de l'invention, devront être plutôt réservés à la coulée de brames de largeur classique, c'est à dire jusqu'àl 650 mm environ pour fixer les idées. Au delà, on optera de préférence pour des rouleaux brasseurs divisés à deux demi-viroles et support central, étant toutefois souligné que, pour autant, il n'y a aucune contre-indication à les utiliser également pour la coulée de brames de largeur habituelle. The stirring rollers according to the invention, in their embodiment without central support 21, can be integrated without particular difficulties to a segment of the structure of the casting machine carrying other usual rollers for supporting and guiding the slab. This is also true for split brewing rollers according to the invention, because the usual support rollers are also provided with intermediate bearings or intermediate supports in the case of wide machines and the structure of the segments is already designed with frames for central supports. It will have been understood from this observation that the undivided stirring rollers with a single ferrule, and therefore without a central support, in accordance with one embodiment of the invention, should rather be reserved for the casting of slabs of conventional width, that is to say until about 650 mm to fix the ideas. Beyond this, preference will be given to brewing rolls divided into two half-shells and a central support, however it is emphasized that, for all that, there is no contraindication to use them also for the casting of slabs of usual width. .
A titre d'exemple non limitatif, pour la coulée de brames larges, de l'ordre de 2000 mm ou plus par exemple, on peut prévoir des rouleaux brasseurs divisés à deux inducteurs distincts qui présentent chacun une longueur de virole de l'ordre de 1000 mm, avec un support central de 10 cm de large environ. Le diamètre des demi viroles peut être, lui, de l'ordre de 240 mm ou plus.  By way of non-limiting example, for the casting of wide slabs, of the order of 2000 mm or more, for example, it is possible to provide divided stirring rollers with two distinct inductors each having a length of ferrule of the order of 1000 mm, with a central support about 10 cm wide. The diameter of the half-rings may be, him, of the order of 240 mm or more.
En variante, on peut prévoir, pour certains au moins des rouleaux brasseurs divisés à support central équipant une machine de coulée continue de brames, que les longueurs des deux demi- viroles soient inégales. En effet, l'absence de guidage de la brame coulée sur la largeur du support central fait que la portion de la brame passant en regard de ce "trou" peut gonfler. Aussi, prévoir des rouleaux brasseurs divisés ayant des demi viroles contigues de longueur inégale, en disposant donc leur support central de façon décalée entre deux rouleaux brasseurs divisés successifs, permettra de faire en sorte que ce ne soit pas toujours la même portion de la largeur de la brame qui gonflera. On évitera ainsi au besoin les défauts de brames générés par le gonflement tels que criques et porosités.  As a variant, it is possible to provide, for at least some of the central support divided stirring rollers equipping a continuous slab casting machine, that the lengths of the two half-rings are unequal. In fact, the absence of guiding of the cast slab on the width of the central support means that the portion of the slab passing opposite this "hole" can swell. Also, to provide divided brewing rollers having contiguous half-rings of unequal length, thus arranging their central support shifted between two successive divided brewing rollers, will make it possible that it is not always the same portion of the width of the slab that will swell. This avoids slab defects caused by swelling, such as cracks and pores, if necessary.
On pourra observer que les roulements de la virole pourront être exposés à la chaleur de la brame en cours de coulée davantage que dans la technologie connue de rouleaux brasseurs à fusées porteuses décalées de part et d'autre de la virole. En variante, on pourra donc opter avantageusement pour des roulements de viroles à déformation thermique hélicoïdale. Ce type de roulements mécaniques se trouve dans le commerce. A ce propos, on signale ici, à titre purement informatif, les roulements produits et commercialisés par la firme allemande "Maschinenfabrik Joseph EICH KG Gmbh.  It may be observed that the bearings of the ferrule may be exposed to the heat of the slab during casting more than in the known technology of rocker rollers carrier staggered on either side of the ferrule. In a variant, it will therefore be possible to advantageously opt for bearings of hoop with thermal helical deformation. This type of mechanical bearings is commercially available. In this connection, it is reported here, for information purposes only, the bearings produced and marketed by the German firm "Maschinenfabrik Joseph EICH KG Gmbh.
Il va de soi que l'invention ne saurait se limiter aux exemples déréalisation décrits, mais qu'elle s'étend à de multiples variantes ou équivalents dans la mesure où est respectée sa définition donnée par les revendications qui suivent.  It goes without saying that the invention can not be limited to the derealization examples described, but that it extends to multiple variants or equivalents to the extent that its definition given by the following claims is respected.
Par exemple, on aura compris qu'il faut entendre par le terme "fusée" utilisé pour qualifier les éléments support montés aux extrémités de la ou des deux viroles constitutives d'un rouleau brasseur divisé, recouvre tout organe de transmission apte à assurer une liaison rigide étanche entre les viroles et les paliers à roulements qui les portent en rotation axiale libre.  For example, it will be understood that is meant by the term "rocket" used to qualify the support elements mounted at the ends of the or two ferrules constituting a divided baffle roll, covers any transmission member capable of providing a connection a rigid seal between the ferrules and the rolling bearings which carry them in free axial rotation.

Claims

REVENDICATIONS
1. Rouleau-brasseur pour une machine de coulée continue de produits métalliques de large section droite, tels une brame, comprenant : 1. Beater roll for a machine for continuous casting of large cross section metal products, such as a slab, comprising:
- (a) au moins une virole externe en acier amagnétique en rotation axiale destinée à venir au contact avec la surface d'une grande face de la brame coulée,  - (a) at least one outer ring made of non-magnetic steel in axial rotation intended to come into contact with the surface of a large face of the cast slab,
- (b) des organes de liaison mécanique assurant le support de la virole en la laissant libre en rotation axiale,  (b) mechanical connecting members providing support for the ferrule, leaving it free in axial rotation,
- (c) des éléments support du rouleau brasseur déportés de part et d'autre au delà des limites de la virole et fixés au châssis de la machine de coulée,  - (c) support elements of the mixing roll offset on both sides beyond the limits of the ferrule and fixed to the frame of the casting machine,
- (d) un équipement électromagnétique interne constitué par au moins un inducteur linéaire polyphasé à champ magnétique glissant, monté coaxialement avec la virole de manière à ménager entre eux un espace annulaire pour la circulation d'un liquide de refroidissement, ledit équipement constituant un arbre axial pourvu d'extensions terminales qui viennent en appui bloqué en rotation axiale sur lesdits éléments support, lesdites extensions terminales étant creuses pour permettre le passage du liquide de refroidissement et le passage des connexions électriques de l'inducteur, et  - (d) an internal electromagnetic equipment consisting of at least one polyphase linear magnetic field inductor sliding, coaxially mounted with the ferrule so as to provide between them an annular space for the circulation of a cooling liquid, said equipment constituting a tree axial end provided with end extensions which support blocked in axial rotation on said support elements, said end extensions being hollow to allow the passage of the cooling liquid and the passage of the electrical connections of the inductor, and
- (e) des boîtiers d'entrée/sortie du liquide de refroidissement pourvus de bornes de connexions électriques et montés aux extrémités des extensions terminales de l'inducteur au delà desdits éléments support;  - (e) coolant inlet / outlet housings provided with electrical connection terminals and mounted at the ends of the inductor terminal extensions beyond said support members;
rouleau-brasseur caractérisé en ce que la virole (1 ) porte sur l'inducteur (8) par l'intermédiaire desdits organes de liaison mécanique constitués par des roulements (3) interposés entre ladite virole et les extensions terminales (20) de l'inducteur. stirring roll characterized in that the ferrule (1) bears on the inductor (8) via said mechanical connecting members constituted by bearings (3) interposed between said ferrule and the end extensions (20) of the inductor.
2. Rouleau-brasseur selon la revendication 1 , caractérisé en ce qu'il comprend deux demi-viroles ( la, l b) alignées distinctes dotées d'organes de liaison mécanique avec une extension intermédiaire (20c) de l'inducteur démunie de bobinages électriques, et un support central (21 ) solidaire du châssis (5) de la machine de coulée, lesdits organes de liaison mécanique étant constitués par au moins un roulement intermédiaire (3c, 3d) porté par ladite extension intermédiaire (20c) et cette dernière étant en appui sur ledit support central (21). 2. Roller stirrer according to claim 1, characterized in that it comprises two half-rings (1a, 1b) aligned with separate mechanical connecting members with an intermediate extension (20c) of the inductor without electrical coils , and a central support (21) secured to the frame (5) of the casting machine, said mechanical connecting members being constituted by at least one intermediate bearing (3c, 3d) carried by said intermediate extension (20c) and the latter being resting on said central support (21).
3. Rouleau-brasseur selon la revendication 2, caractérisé en ce que chaque demi- virole (la, l b) incorpore son propre inducteur (8a, 8b) 3. Roller stirrer according to claim 2, characterized in that each half-shell (la, l b) incorporates its own inductor (8a, 8b)
4. Rouleau-brasseur selon la revendication 2 caractérisé en ce que ledit roulement intermédiaire est un roulement unique, commun aux deux demi-viroles (la, l b) aux extrémités desquelles il est fixé de part et d'autre. 4. Roller stirrer according to claim 2 characterized in that said intermediate bearing is a single bearing, common to the two half-rings (la, l b) at the ends of which it is fixed on both sides.
EP12719254.0A 2012-03-27 2012-03-27 Stirring roller for a machine for the continuous casting of metallic products of broad cross section Active EP2830794B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/001330 WO2013143557A1 (en) 2012-03-27 2012-03-27 Stirring roller for a machine for the continuous casting of metallic products of broad cross section

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EP2830794A1 true EP2830794A1 (en) 2015-02-04
EP2830794B1 EP2830794B1 (en) 2016-10-26

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US (1) US20150290703A1 (en)
EP (1) EP2830794B1 (en)
JP (1) JP5874945B2 (en)
KR (1) KR101728444B1 (en)
CN (1) CN104159686B (en)
BR (1) BR112014019299B1 (en)
RU (1) RU2600776C2 (en)
WO (1) WO2013143557A1 (en)

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AT522811B1 (en) 2019-07-17 2021-10-15 Primetals Technologies Austria GmbH Electromagnetic coil arrangement and electromagnetic agitator roller for a continuous casting plant
EP3766600B1 (en) 2019-07-17 2022-09-07 Primetals Technologies Austria GmbH Electromagnetic coil arrangement for an electromagnetic stirrer roller of a continuous casting plant
EP3871803A1 (en) 2019-07-17 2021-09-01 Primetals Technologies Austria GmbH Electromagnetic coil arrangement and electromagnetic roller for a continuous casting plant
DE102020200001A1 (en) * 2020-01-01 2021-07-01 Aktiebolaget Skf Roller line unit & continuous caster
CN112548053B (en) * 2020-11-23 2021-12-31 湖南中科电气股份有限公司 Asymmetric sectional roller type electromagnetic stirring device for continuous casting slab secondary cooling area

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Publication number Publication date
BR112014019299A2 (en) 2017-06-20
BR112014019299A8 (en) 2017-07-11
KR101728444B1 (en) 2017-05-02
US20150290703A1 (en) 2015-10-15
RU2600776C2 (en) 2016-10-27
JP2015511536A (en) 2015-04-20
RU2014132904A (en) 2016-05-20
CN104159686B (en) 2016-03-23
CN104159686A (en) 2014-11-19
KR20140138700A (en) 2014-12-04
BR112014019299B1 (en) 2018-11-21
JP5874945B2 (en) 2016-03-02
WO2013143557A1 (en) 2013-10-03
EP2830794B1 (en) 2016-10-26

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