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EP3766600B1 - Dispositif a bobine electromagnetique pour un rouleau agitateur electromagnetique d'une installation de coulee continue - Google Patents

Dispositif a bobine electromagnetique pour un rouleau agitateur electromagnetique d'une installation de coulee continue Download PDF

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Publication number
EP3766600B1
EP3766600B1 EP20185987.3A EP20185987A EP3766600B1 EP 3766600 B1 EP3766600 B1 EP 3766600B1 EP 20185987 A EP20185987 A EP 20185987A EP 3766600 B1 EP3766600 B1 EP 3766600B1
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EP
European Patent Office
Prior art keywords
coil winding
iron core
winding assemblies
electromagnetic
cross
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EP20185987.3A
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German (de)
English (en)
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EP3766600A1 (fr
Inventor
Peter Paul WIMMER
Martin Hirschmanner
Felix LINDLBAUER
Andreas ROHRHOFER
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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    • 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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/34—Arrangements for circulation of melts
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/44—Coil arrangements having more than one coil or coil segment

Definitions

  • Electromagnetic stirrers are used in continuous casting plants to produce high-quality electrical steel. If the stirrer is located in the area of the so-called pouring arch, it is referred to as a strand stirrer. If the electromagnetic stirrer is installed in a roller of a segment of the continuous casting plant, it is referred to as a so-called stirrer roller.
  • the strand agitator creates a stirring force in the liquid section of the strand that moves the liquid steel horizontally along a casting production width and creates a butterfly-like flow pattern in the liquid steel.
  • the construction sees usually a pair of rollers, which acts on the strand either from both sides or side by side.
  • Such agitator rollers are, for example, from the documents US2015/0290703 A1 and US2013/0008624 A1 known.
  • These stirring rollers consist of an iron core and coil winding packs.
  • These coil winding packets consist of a wire that is wound into a large number of windings lying next to one another and layers lying one on top of the other. The wire is covered with an electrical insulation layer.
  • the current-carrying winding packages enclosing the iron core generate the magnetic flux, which depends on the number of turns and the current strength in the windings. The magnitude of the magnetic flux density in turn determines the strength of the stirring force of the electromagnetic stirrer.
  • the ohmic resistance of the windings results in a certain power loss, which is converted into heat and must be dissipated by cooling.
  • the electrical insulation layer is a poor conductor of heat, which means that the heat from the lower layers of the winding packages is poorly transported to the outside, where the heat can be dissipated particularly effectively. There is therefore the problem for a bottom layer of the winding that the maximum temperature of the insulation layer is reached after a certain time and the current intensity must therefore be limited. As a result, the stirring power is also limited accordingly.
  • the object of this invention is an electromagnetic coil assembly and a to create electromagnetic stirring roller of the type mentioned, which an effective heat dissipation - the heat generated in the coil winding packets - enables the to be able to operate the electromagnetic coil arrangement and the electromagnetic stirring roller with the highest possible performance.
  • the object is achieved with the electromagnetic coil arrangement mentioned at the outset in that the at least two coil winding packets enclose the iron core in partial areas along the first longitudinal extension.
  • the first longitudinal extension means an iron core length.
  • the coil winding packages consist of a maximum of two layers lying one on top of the other, preferably only one layer, and a large number of turns lying next to one another.
  • the respective coil winding packet thus consists of a large number of windings that are wound next to one another and of a maximum of two layers lying one on top of the other.
  • the number of turns is determined by calculations and depends on a maximum available voltage and a maximum current density at a given stirring frequency. The goal is always to provide the highest possible stirring effect, i.e. the highest possible magnetic flux density.
  • the individual windings are covered with an insulating material so that the individual windings are electrically insulated from one another.
  • the insulating material is preferably a polyimide film.
  • the coil winding packets are designed in such a way that they can be slid onto the iron core from one end face of the iron core up to an intended assembly position for assembly. When pushed on, the coil winding packets have internal dimensions which are larger than the external dimensions of the iron core in order to allow the coil winding packets to be pushed onto the iron core.
  • This embodiment is intended to enable the coil winding packages to be produced without an iron core and for the coil winding package and iron core to be assembled separately.
  • the dimensions of the coil winding packets can be increased during assembly by expansion, such as heating or twisting the windings, in order to facilitate or enable sliding.
  • the coil winding packages are ie designed in such a way that they are in a form for assembly or can be brought into a form in order to enable them to be slid onto the support tube.
  • the coil winding packages have a protective layer for protection and insulation. This protective layer completely encloses the coil winding packages.
  • the protective layer surrounds the coil winding packages in such a way that at least one outside and both lateral surfaces of the respective coil winding package are surrounded by the protective layer.
  • the fastening stubs are arranged on the face of the iron core.
  • the electrical connection contacts are each connected to at least one coil winding package.
  • a preferred arrangement of the electrical connection contacts is on the end faces of the fastening stubs.
  • the fastening stubs have bushings which make it possible to guide the electrical connection contacts to an end face of the fastening stub that can be seen from the outside.
  • the coil winding packages can then be electrically connected via the connection contacts to this end face.
  • the fastening stubs have the function of being able to mount the coil arrangement on a bearing block.
  • the design of the coil winding packages with a maximum of two layers allows the heat to be dissipated more easily. It has also been shown that by minimizing the layers - to a maximum of two - the electromagnetic flux density can be kept at a higher level over a longer period of time than is the case with an embodiment with more than two layers. The resulting heat can be dissipated better.
  • This design reduces the temperature difference between the inner layer and the outermost layer to as little as 120 Kelvin. In the preferred embodiment of the coil winding packages with only one layer, the temperature difference between inside and outside can be reduced to up to 60 Kelvin at a current density of 17 A/m 2 .
  • a particularly preferred embodiment is that the windings have a rectangular cross-section, the dimension of the winding being larger in the radial direction than in the axial direction.
  • the ratio of the dimension in the axial direction - i.e. a width of a cross section of the winding - to the dimension in the radial direction - i.e. a height of a cross section of the winding - is preferably in a range from 1/3 to 1/8, particularly preferably 1/4 to 1/6
  • the windings are therefore designed as so-called standing windings. Due to the rectangular cross section, several narrow and high windings can be arranged next to each other in order to obtain the desired number of windings and still produce a compact coil winding package. In this context, rectangular is also understood to mean that the corners can have curves, which ensure simpler assembly when assembling the coil winding arrangement.
  • a winding with a rectangular cross section and only one layer has turned out to be a particularly preferred embodiment.
  • This embodiment variant results in particularly good heat dissipation to the outside. Experiments have shown that this results in the lowest temperature difference. In this single-layer design, there are no transitions in the radial direction from the insulated winding to the insulated winding lying above it, which results in particularly good heat transport to the outside.
  • a further advantageous embodiment of the invention provides that the iron core has at least one cooling channel.
  • the Heat generated in the iron core can be dissipated particularly effectively.
  • a protective tube with a hollow cross section, preferably a circular cross section encloses the coil winding packages.
  • the protective tube extends at least over the two coil winding packs.
  • a possible design of the protective tube is that it consists of several parts and existing joints are sealed - for example with glued metal strips.
  • the gaps between the protective tube and the coil winding packages are filled with filling compound.
  • the filling compound means that as much heat as possible is transferred to an inside of the protective tube.
  • This protective tube is made of a material with good thermal conductivity, preferably non-magnetic steel, and thus conducts the heat from an inside to an outside of the protective tube.
  • the filling compound has a thermal conductivity of greater 0.1 W m K , preferably larger 1 W m K , having.
  • the filling compound with this thermal conductivity ensures particularly good heat dissipation from the coil winding packages to the protective tube.
  • An expedient embodiment provides that the iron core is arranged in a hollow support tube with a second longitudinal extent.
  • the support tube therefore has a hollow cross section and extends along a longitudinal axis.
  • the support tube has a support tube length which is of the order of magnitude of the casting production width.
  • the iron core can be stabilized over the casting production width by the support tube.
  • the support tube has a plurality of slots along the second longitudinal extent, in particular at least two, preferably at least four, particularly preferably at least six, very particularly preferably eight slots, each having a predetermined slot area.
  • the iron core is designed in such a way that in each case a partial volume of the iron core can be pushed into one of these slots; the respective partial volumes preferably fill the respective slots completely.
  • the design with several slits has the advantage that an expansion of the tube due to possible internal mechanical stresses in the tube is prevented by means of webs located between the slits. This embodiment therefore provides for between three and ten slots to be present, which are arranged along the second longitudinal extension.
  • the iron core therefore has a partial volume for each slot, which can be pushed into the slots.
  • the bars in the iron core must also be shown as a negative, so that the partial volumes can be pushed into the respective slots.
  • a further preferred embodiment provides that cooling channels are arranged next to the iron core within the support tube. These cooling channels run close to the iron core in order to dissipate the heat generated as effectively as possible.
  • the cooling channels can be designed as a tube that is pushed into the support tube next to the iron core.
  • a further advantageous embodiment provides that the slot area is rectangular. This embodiment is preferred because it achieves the largest possible slot area.
  • the electrical connection contacts have a bolt with a bolt cross-sectional area which can transmit a required energy to the coil winding packets, and a
  • connection contacts must be able to be arranged and fastened in a very limited space. For this reason, the connection contact should, on the one hand, be able to transmit the required energy to the coil winding packets and, on the other hand, have a reliable attachment. Electrical supply cables should preferably be connected to the connection contacts using a cable lug. The cable lug is pushed onto the fastening stub, whereby this must be fixed in such a way that it has good contact with the cross-sectional area of the bolt.
  • the fastening bolt has a thread and the cable lug is pressed onto the fastening cross-sectional area by screwing on a nut. Due to the reduced mounting cross-sectional area, the contacts require less space. This design makes it possible for the connection contacts to be arranged on the end faces of the fastening stubs, despite the limited space required.
  • a particularly preferred embodiment provides that the coil winding packets closest to the fastening stubs and all coil winding packets electrically connected thereto have a higher total number of turns than a total number of turns of all other coil winding packets—each electrically connected to one another.
  • the inductance L is calculated by Equation 1, where N is the number of turns.
  • the magnetic resistance in the air gap is calculated using Equation 2, where ⁇ 0 is the permeability of vacuum and A is the cross-sectional area of the magnetic conductor.
  • Equation 3 shows the formula for the magnetic reluctance in iron, where ⁇ r is the relative permeability of the iron core.
  • Equation 1 the inductance can be changed either via the number of turns N or via the magnetic resistance R m,ges .
  • the simplest version is obtained by adapting the number of turns.
  • the coil winding packets connected to the individual electrical connection contacts should have almost the same current carrying capacity and inductance by adapting the total number of turns.
  • the electrical coil winding arrangement has three electrical connection contacts and the number of coil winding packages corresponds to a multiple of three plus two.
  • the number of coil winding packets is therefore, for example, at least five, preferably at least eight, particularly preferably at least eleven, very particularly preferably fourteen.
  • the coil winding packages closest to the fastening stubs have a smaller number of turns than the remaining coil winding packages.
  • the coil winding packets, which are arranged in the vicinity of the attachment stub, that is to say are arranged on the edge of the iron core serve as so-called compensating coil winding packets.
  • a connection contact is connected to the two coil winding packages closest to the fastening stub.
  • the number of turns of the compensating coil winding packs is greater than half the number of turns but less than the number of turns of the remaining coil winding packs.
  • Another embodiment is that two electrical connection contacts are connected to a compensating coil winding packet.
  • the electromagnetic coil winding arrangement has three electrical connection contacts.
  • the number of coil winding packages is at least three or one multiple of three.
  • the coil winding packages closest to the fastening stubs have a larger number of turns than the remaining coil winding packages.
  • at least two electrical terminals are connected to a coil winding package closest to the mounting stubs.
  • the object according to the invention is achieved by the electromagnetic stirring roller mentioned at the outset.
  • the electromagnetic coil assembly described above is located within the roller.
  • the electromagnetic coil arrangement is fixed to a bearing block on both sides.
  • a cooling channel is formed between the tube and the coil arrangement, which is connected to the inflow and the outflow. The role exerts a supporting effect on the strand.
  • This arrangement results in an electromagnetic stirring roller which, with the same electrical connected load and size, achieves a greater magnetic flux and thus an increased stirring effect.
  • the roller is rotatably mounted on the bearing block on both sides.
  • This design has proven to be a particularly robust design.
  • Another embodiment is that the storage takes place on the fastening stubs.
  • the iron core 2 has a first longitudinal extension L1.
  • This first longitudinal extension L1 results from an extension from a left to a right fastening stub 12.
  • the first longitudinal extension L1 is therefore to be understood as a length of the iron core.
  • the coil winding packages 10 have two layers 11a and a multiplicity of turns 11b. The individual turns 11b are covered with an insulating material.
  • Fastening stubs 12 are arranged on each end face of the iron core.
  • the electrical contacts 15 are also located on the fastening stubs 12.
  • the coil winding packages 10 are connected to an electrical energy supply by means of these electrical contacts 15.
  • the coil winding packets 10 are enclosed in a protective layer 13a so that they are protected against mechanical wear and electrically isolated from the outside.
  • the coil winding packets 10 are designed in such a way that, for assembly, they can be pushed on from an end face 6a to an assembly position 6b.
  • a coil winding arrangement 1 according to the invention is shown.
  • the iron core 2 is arranged in a hollow support tube 3 .
  • the hollow support tube 3 is - surrounded by two coil winding packets 11 - in this embodiment.
  • the fastening stubs 12 are attached to the front of the support tube 3 and are used to fix the coil winding arrangement 1 in a stirring roller.
  • the electrical contacts 15 are guided inwards through the fastening stubs 12 to the coil winding packets. This electrical connection exists on both sides, ie on the left fastening stub 12 and on the right fastening stub 12. Different electrical phases are connected to the electrical contacts 15 on one side.
  • the coil winding arrangement can be supplied with a two-phase system.
  • the at least two electrical contacts 15 have no electrical connection to one another.
  • the coil winding packs 10 are surrounded by a protective tube 13 . Intermediate spaces present between the coil winding packages 10 and the protective tube 13 are filled with a filling compound 14 .
  • the 3 differs from 2 in that six coil winding packages are arranged along the first longitudinal extension. These coil winding packets each have only one layer 11a and a large number of turns 11b.
  • Several slots 4 are present in the support tube 3 .
  • the individual slots 4 are each separated from one another by a web 5 .
  • These webs 5 have the function of preventing the support tube 3 from widening when the slot is being made.
  • the webs are arranged in such a way that, in a preferred embodiment, they are completely surrounded by a coil winding packet--that is, the webs 5 lie under a coil winding packet 10.
  • the iron core 2 is designed with a plurality of slots 4 in such a way that it also has a number of partial volumes of the Has iron core 2a, which fill the respective slots 4 almost completely.
  • the partial volumes of the iron core 2a are represented by the vertical hatching.
  • the coil winding packs 10 are surrounded by a protective tube 13 . Intermediate spaces present between the coil winding packages 10 and the protective tube 13 are filled with a filling compound 14 .
  • the cross section of a coil winding assembly is in 4 shown.
  • the iron core 2 - which has a cross section A - is arranged in the support tube 3 .
  • the partial volume of the iron core 2a is pushed into the slot 4 of the support tube 3 .
  • the partial volume of the iron core 2a almost fills the slot, but there is a small gap on the left and right to enable insertion.
  • the coil winding packs 3 enclose the iron core 2 and the support tube 3, the coil winding packs 10 having two layers 11a.
  • the coil winding packets 10 are enclosed by the protective tube 13, with a remaining space being filled with filling compound 14. Cooling channels 20 are arranged next to the iron core.
  • a cooling channel is present in the iron core 21 in addition to the cooling channels 20 .
  • the arrangement of the cooling channels shown here is only an example; it is also conceivable that only the cooling channels 20 or only the cooling channels in the iron core 21 are present.
  • the 6 shows an agitator roller 30 for a continuous casting plant.
  • the agitator roller 30 includes the coil winding assembly 1 and a roller 31 which supports a strand produced by the continuous casting plant.
  • the coil winding arrangement 1 is on both sides in a bearing block 36 - on the mounting stub 12 - fixed.
  • the roller 31 is rotatably mounted on both sides.
  • the bearing 35 is arranged in the bearing block 36 .
  • a coolant can be supplied through a coolant inflow 32 and removed again through a coolant outflow.
  • the electrical contacts 15 are each connected to a coil winding package 10 .
  • the coil winding packets consist of a layer 11a and a large number of turns 11b.
  • the single-layer design ensures particularly good heat dissipation to the outside to the protective tube 13 or the insulating layer 13a (not shown).
  • the coil winding packages 10 have two layers 11a and each layer 11a has a plurality of turns 11b.
  • FIG. 9 a schematic representation of an embodiment of the coil winding arrangement is shown.
  • the iron core 2 with a cross section and a first longitudinal extent is surrounded by a plurality of coil winding packages 10u, 10v, 10w along the first longitudinal extent.
  • the u-phase coil winding pack 10u has a larger number of turns 11b than the v-phase coil winding pack 10v and the w-phase coil winding pack 10w.
  • two coil winding packages are connected to each of the three phases.
  • the phase u and the phase w are each connected to a coil winding package 10u, 10w which is closest to the mounting stub.
  • coil winding packages 10u, 10w connected to the phases u and the phase w have a higher number of turns than the coil winding packages 10v connected to the phase v.
  • the coil winding packets 10u, 10v, 10w connected to the individual phases u, v, w should have a number of turns that have almost the same current carrying capacity and almost the same inductance.
  • the number of coil winding packages is a multiple of three - e.g. three, six, nine, twelve, etc..
  • FIG 12 is another schematic representation of an embodiment of the invention.
  • the phase u has an electrical connection with coil winding packages 10u, which are closest to the end faces of the iron core 2 or the fastening stub (not shown).
  • the coil winding packages 10u connected to the phase u have a higher number of turns than the coil winding packages 10v, 10w connected to the phase v and the phase w.
  • connection contacts 15 are shown as a plan view.
  • the space requirement on the attachment stub 12 for connecting three phases is small.
  • An electrical connection cable is fastened in a cable lug 43 and is pressed snugly against the electrical connection contact 15 with a fastening element 42—in the present example a nut.
  • In 12 is a plan and elevation of the in 10 connection contacts described shown schematically.
  • the cable lug 43 is pressed firmly onto the bolt cross section 40a by means of a fastening element (nut) 42 and a washer 44 .
  • the fastening bolt 41 has a fastening bolt cross section 41a.
  • the ratio of bolt cross section 40a and fastening bolt cross section 41a is in the ratio of 1.7 to 4.
  • Bolt 40 is advantageously designed with a round cross section and fastening bolt 41 has a thread.
  • a ratio of bolt diameter to fastening bolt thread diameter - whereby the nominal thread diameter is used here - is between 1.3 and 2.
  • FIG. 13 12 is an enlarged view of an electrical terminal including the bolt 40, the cable lug 43, the washer 44, and the fastener 42 screwed onto the fastener bolt 41.
  • FIG. 13 12 is an enlarged view of an electrical terminal including the bolt 40, the cable lug 43, the washer 44, and the fastener 42 screwed onto the fastener bolt 41.
  • a further preferred embodiment is shown, which differs from that in 12 differs in that a washer 44 is attached on both sides of the cable lug 43.
  • the washer 44 which rests on the bolt 40 can also be rigidly connected to the bolt - for example by being welded to the bolt 40. But it is also conceivable that instead of the washer - which rests on the bolt - a nut is screwed onto the bolt or the fastening bolt.
  • a support tube 3 with a plurality of slots 4 is shown.
  • the webs 5 are located between the slots 4.
  • the partial volumes of the iron core can be inserted into the slots 4.
  • a coil winding package 10 is shown with one layer. Typical dimensions of the turns of the coil winding package 10 are a width of 3mm and a height of 12mm.

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  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (15)

  1. Agencement de bobines électromagnétiques pour un rouleau brasseur électromagnétique d'une installation de coulée continue comprenant un noyau de fer (2) avec une section transversale de noyau de fer et une première extension longitudinale (L1), et au moins deux paquets d'enroulement de bobine (10), deux tronçons de fixation (12), au moins deux contacts de raccordement électriques (15) qui sont reliés chacun à au moins un paquet d'enroulement de bobine (10), dans lequel :
    - les au moins deux paquets d'enroulement de bobine (10) entourent le noyau de fer (2), dans des zones partielles le long de la première extension longitudinale (L1),
    - dans lequel les paquets d'enroulements de bobine (10) sont constitués au maximum de deux couches superposées (l1a), de préférence uniquement d'une couche (11a), ainsi que d'une pluralité de spires (11b) les unes à côté des autres,
    - dans lequel les paquets d'enroulement de bobine (10) sont conçus de telle sorte qu'ils peuvent être déplacés pour un montage à partir d'une face avant du noyau de fer (2) jusqu'à une position de montage prévue,
    - dans lequel les spires individuelles (11b) sont recouvertes d'un matériau isolant,
    - dans lequel une couche de protection (13a) entoure les paquets d'enroulement de bobine (10),
    - les troncs de fixation (12) étant agencés sur le noyau de fer (2) au niveau de chaque face avant.
  2. Agencement de bobines électromagnétiques selon la revendication 1, dans lequel les spires (11b) ont une section transversale rectangulaire, dans lequel la dimension de la spire (11b) dans la direction radiale est supérieure à celle dans la direction axiale, de préférence un rapport de la dimension dans la direction axiale à la dimension dans la direction radiale est dans une plage comprise entre 1/3 et 1/8, de manière particulièrement préférée dans une plage comprise entre 1/4 et 1/6.
  3. Agencement de bobines électromagnétiques selon la revendication 1 ou 2, dans lequel le noyau de fer (2) présente des canaux de refroidissement (21).
  4. Agencement de bobines électromagnétiques (1) selon l'une des revendications 1-3, dans lequel la couche de protection (13a) est un tube de protection (13) de section transversale creuse, de préférence de section transversale annulaire circulaire, qui entoure les paquets d'enroulement de bobine (10), dans lequel les intervalles existants entre le tube de protection (13) et les paquets d'enroulement de bobine (10) sont remplis au moyen d'une masse de remplissage (14).
  5. Agencement de bobines électromagnétiques selon la revendication 4, dans lequel la masse de remplissage (14), présente une conductivité thermique supérieure à 0,1 W ⃛ m K
    Figure imgb0011
    , de préférence supérieure à 1 W ⃛ m K
    Figure imgb0012
    .
  6. Agencement de bobines électromagnétiques selon l'une des revendications 1-5, dans lequel le noyau de fer (2) est agencé dans un tube de support (3) avec une seconde extension longitudinale.
  7. Agencement de bobines électromagnétiques selon la revendication 6, dans lequel le tube de support (3) présente le long de la seconde extension longitudinale (L2) au moins une fente (4), en particulier au moins deux, de préférence au moins quatre, de manière particulièrement préférée au moins six, de manière encore plus particulièrement préférée huit fentes (4), avec chacune une surface de fente prédéterminée, et le noyau de fer (2) est agencé de telle sorte qu'un volume partiel du noyau de fer (2a) peut être inséré dans ces fentes (4), de préférence le ou les volume(s) partiel(s) respectif(s) du noyau de fer (2a) remplisse(nt) complètement les fentes (4).
  8. Agencement de bobines électromagnétiques selon l'une des revendications 1-7, dans lequel des canaux de refroidissement (20) sont agencés à l'intérieur du tube de support (3) à côté du noyau de fer (2).
  9. Agencement de bobines électromagnétiques selon la revendication 7, dans lequel la surface de fente est rectangulaire.
  10. Agencement de bobines électromagnétiques selon l'une des revendications 1-9, dans lequel les contacts de raccordement électriques (15) comprennent un boulon (40) présentant une surface de section transversale de boulon (40a), qui peut transmettre une énergie requise aux paquets d'enroulement, et un tronçon de boulon de fixation (41) présentant une surface de section transversale de fixation (41a), dans lequel la surface de section transversale de boulon (40a) et la surface de section transversale de fixation (41a) ont un rapport de 1,7 à 4.
  11. Agencement de bobines électromagnétiques selon les revendications 1-10, dans lequel les paquets d'enroulement de bobine (10) respectivement les plus proches des tronçons de fixation (12) et tous les paquets d'enroulement de bobine (10) reliés électriquement à ceux-ci présentent un nombre total de spires supérieur à un nombre total de spires de tous les autres paquets d'enroulement de bobine (10) respectivement reliés électriquement les uns aux autres.
  12. Agencement de bobines électromagnétiques selon l'une des revendications 1-11, dans lequel celui-ci présente trois contacts de raccordement électriques (15) et une multiplicité de paquets d'enroulement de bobine (10), dans lequel la multiplicité correspond à un multiple de trois plus deux et les paquets d'enroulement de bobine (10) respectivement les plus proches du tronçon de fixation (12) ont un nombre de spires plus petit que les paquets d'enroulement de bobine restants (10).
  13. Agencement de bobines électromagnétiques selon l'une des revendications 1-11, dans lequel celui-ci présente trois contacts de raccordement électriques (15) et présente des paquets d'enroulement de bobine (10) en un nombre d'au moins trois ou d'un multiple de trois, dans lequel les paquets d'enroulement de bobine (10) respectivement les plus proches du tronçon de fixation (41) ont un nombre de spires plus grand que les paquets d'enroulement de bobine restants (10).
  14. Rouleau brasseur électromagnétique pour une installation de coulée continue pour la fabrication de produits de grandes sections transversales, en particulier de brames, comprenant :
    - un rouleau (31) de section transversale creuse circulaire qui est monté de manière rotative des deux côtés,
    - une entrée de milieu de refroidissement (32),
    - une sortie de milieu de refroidissement (33),
    dans lequel l'agencement de bobines électromagnétiques (1) selon l'une des revendications 1-13 est agencé à l'intérieur du rouleau (31) et celui-ci est fixé des deux côtés à un support de palier (36), dans lequel un canal de refroidissement (20) est formé entre le tube (31) et l'agencement de bobines (1), lequel est relié à l'entrée (31) et à la sortie (32).
  15. Rouleau brasseur électromagnétique selon la revendication 14, dans lequel le rouleau (31) est monté sur le support de palier de manière à pouvoir tourner des deux côtés.
EP20185987.3A 2019-07-17 2020-07-15 Dispositif a bobine electromagnetique pour un rouleau agitateur electromagnetique d'une installation de coulee continue Active EP3766600B1 (fr)

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CN113601854B (zh) * 2021-09-03 2025-01-28 昆山艾尤诺新材料科技有限公司 一种抗蠕变的膨体聚四氟乙烯密封垫片加工装置及方法
CN118629741B (zh) * 2024-08-13 2024-10-22 宜宾大正电子设备有限公司 一种多风道式充磁绕组包结构及绕制方法

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US3995678A (en) * 1976-02-20 1976-12-07 Republic Steel Corporation Induction stirring in continuous casting
FR2494607A1 (fr) * 1980-11-25 1982-05-28 Cem Comp Electro Mec Inducteur a champ glissant et a flux oriente pour rouleau- brasseur de coulee continue de brames
SU1616770A1 (ru) * 1988-06-22 1990-12-30 Ленинградское Производственное Электромашиностроительное Объединение "Электросила" Им.С.М.Кирова Устройство дл электромагнитного перемешивани жидкой сердцевины непрерывного слитка
CN102015157B (zh) * 2008-04-28 2013-06-12 新日铁住金株式会社 钢的连续铸造方法及使用该方法的电磁搅拌装置
FR2957829B1 (fr) 2010-03-23 2012-11-09 Rotelec Sa Rouleau brasseur pour machine de coulee continu de brames
BR112014019299B1 (pt) 2012-03-27 2018-11-21 Rotelec rolo misturador para máquina de lingotamento contínuo de produtos metálicos de grande seção reta

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