EP1298681A1 - Wedge for transformer coil and transformer comprising such a wedge - Google Patents

Wedge for transformer coil and transformer comprising such a wedge Download PDF

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Publication number
EP1298681A1
EP1298681A1 EP02291892A EP02291892A EP1298681A1 EP 1298681 A1 EP1298681 A1 EP 1298681A1 EP 02291892 A EP02291892 A EP 02291892A EP 02291892 A EP02291892 A EP 02291892A EP 1298681 A1 EP1298681 A1 EP 1298681A1
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EP
European Patent Office
Prior art keywords
complementary
wedge
coil
stud
transformer
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.)
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Application number
EP02291892A
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German (de)
French (fr)
Inventor
Olivier Pioch
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Pioch SA
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Pioch SA
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Publication date
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Publication of EP1298681A1 publication Critical patent/EP1298681A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/303—Clamping coils, windings or parts thereof together

Definitions

  • the present invention relates to a coil shim for a transformer. intended to be interposed between the end of a coil and an element of structure of the transformer, of the type comprising a first bearing surface on the coil and a second opposite bearing surface on the structure of the transformer.
  • High power electrical transformers generally include several cylindrical coils arranged one next to the other.
  • a carcass defines a closed magnetic circuit along which the coils are arranged.
  • the carcass has columns axially engaged at inside each of the coils.
  • metal beams Between both sides of the carcass sections connecting the columns engaged in the coils are arranged metal beams between which the coils are enclosed, in order to prevent them from move axially along the length of the columns passing through them.
  • the coils are supported on these beams at each of their ends.
  • insulating shims generally made of plastic material to avoid any play between the coils and the side members.
  • the gap to be filled between the end coils and side members arranged opposite is variable.
  • the object of the invention is to propose bobbin wedges for transformer. and a transformer incorporating them, the cost of which is reduced.
  • the invention relates to a coil shim for a transformer of the aforementioned type, characterized in that it comprises adjustable means for opposing bearing surfaces adapted to hold the two bearing surfaces spaced apart according to at least two distinct configurations in which the intervals repairing the two bearing surfaces are different.
  • the invention further relates to a transformer comprising at at least one coil and at least one structural element, characterized in that it comprises at least one coil shim as defined above, arranged between one end of the or each coil and the or each structural element.
  • a three-phase transformer 10 This comprises three coils 12A, 12B, 12C of generally cylindrical shape extending parallel to each other. These coils are arranged in the same plan.
  • the transformer has a magnetic circuit 14, comprising three columns 16A, 16B, 16C engaged axially in the coils 12A, 12B, 12C. These columns are connected to each other by lower and upper cylinder heads 18 of which only one is shown in FIG. 1.
  • Longers 20 are arranged on either side of the following cylinder heads their length.
  • the coils 12A, 12B, 12C are held axially fixed along the length of the columns 16A, 16B, 16C being sandwiched between the side members 20 opposites.
  • shims 22 are arranged according to the invention.
  • FIG. 2 Such a wedge is shown in exploded perspective in FIG. 2, and in end view, with partial cutaway in Figure 3.
  • All the shims of a transformer are identical. They are made entirely made of plastic. They have a support surface 24 on the edge of a coil and a support surface 26 on the surface of the spar 20 facing the coil.
  • a damping pad for example silicone is interposed between the bearing surface 24 and the end of the coil.
  • These two opposite bearing surfaces 24, 26 generally extend parallel to each other and are spaced from each other by a predetermined interval corresponding to the desired distance between the end of the spool and the associated spar.
  • each wedge 22 comprises adjustable means 28 for spacing opposite bearing surfaces 24, 26 adapted to maintain the two spaced apart surfaces according to at least two distinct configurations in which the intervals separating the two bearing surfaces are different.
  • the support surface 24 on the end of the coil is defined on a first body 30 of the wedge while the surface 26 of bearing on the beam 20 is defined on a second body 32 of the wedge itself consisting of a set of parts as shown in figure 2.
  • first and second bodies 30 and 32 have profiles of complementary sockets suitable for interlocking of the two bodies with each other in at least two relative positions, thereby ensuring adjustment the spacing of the opposite bearing surfaces 24, 26.
  • the first body 30 comprises a flat plate 34 one face of which forms the bearing surface 24.
  • This bearing surface is bordered by a dimensioned by a rim 36 made of material and adapted to bear on the surface inner side of the coil, for example 12A.
  • the body 30 comprises a stud 38 projecting relative to the surface of the plate 34 on the side opposite to the bearing surface 24.
  • This stud 38 extends in the median part of the plate 34 over most of its length, this length extending along the radius of the coil.
  • the stud 34 has, at its top, a flat surface 40 and, laterally, two opposite side surfaces 41 extending parallel to one another the other. These lateral surfaces 41 extend along the length of the plate 34, perpendicular to the flange 36 bearing on the coil. When the wedge is mounted on the coil, the lateral surfaces 41 extend substantially radially relative to the coil.
  • the surfaces 41 have nesting profiles suitable for cooperate with the complementary body 32 of the wedge.
  • these profiles interlocking have longitudinal grooves 42 extending along the entire length of the stud 38. These grooves generally extend parallel to the bearing surface 24.
  • each rib delimiting the grooves 42 has two opposite flanks made up of surfaces planar.
  • a first sidewall 42A opposite the bearing surface 24 extends essentially parallel to this bearing surface.
  • the second side 42B is inclined by relative to the bearing surface 24.
  • the grooves define a set of sides 42A parallel to the bearing surface 24 and staggered one above the other. These sides 42A form bearing surfaces for the second body 32.
  • the number of ribs delimited by these grooves is comprised of preferably between 2 and 10 and is advantageously substantially equal to 5.
  • the pitch of these grooves is between 0.5 and 2 millimeters.
  • Complementary interlocking profiles 44 are provided on the second body 32 of the hold.
  • the latter comprises a spacer 46 and a support pad 48 on which is provided the bearing surface 26.
  • This support pad itself is constituted a base 50 and a cross member 52.
  • the spacer 46 generally has the form of a trigger guard and delimits a yoke 54.
  • the trigger guard 54 has two lips 56 connected to each other by a crosspiece 58.
  • the interlocking profiles 44 are delimited on the lateral surfaces interior of the lips, that is to say on their facing surfaces.
  • These profiles socket consist of grooves extending parallel to the crosspiece 58. These grooves have additional characteristics to the grooves 42 carried by the side walls of the stud 38. They extend along surfaces parallel.
  • each rib delimiting the grooves comprises a support side 44A opposite the support surface 26.
  • This support side extends parallel to the bearing surface 26. It is adapted to rest on a side complementary support 42A of the grooves of the first body 30.
  • each groove has a side 44B inclined relative to the bearing surface 26.
  • the length of the spacer measured in the direction of the grooves is equal to the length of the stud 38 also measured in the direction of the splines.
  • the outer lateral surfaces 60 formed on the lips 56 of the spacer are inclined relative to each other and converge towards each other following the direction of the cross 58.
  • the base 50 has a base 62 generally square.
  • One of the faces of the base is hollowed out and delimits a bowl 64 partial reception of the spacer 46 and in particular of a part thereof engaged around stud 38.
  • This bowl 64 has a flat bottom 66, bordered by four side walls. Two opposite side walls 68 extend parallel to each other. Their spacing is equal to the length of the spacer 28 measured in the direction grooves.
  • the bowl is further delimited by two lateral surfaces opposite planes 70 having parallel generatrices. These surfaces are tilted and converge towards each other towards the bottom of the bowl. The inclination of the surfaces 70 is identical to the inclination of the surfaces 60 of the spacer.
  • the base 50 includes a pillar 72 for connecting the cross member 52.
  • This pillar protrudes from the base 62 in the center of its face opposite to that in which is provided the bowl 64.
  • the pillar 72 has laterally grooves 74. These grooves generally extend along the height of the pillar.
  • the cross member 52 has a channel 76 delimited by two side walls 78 parallel to each other.
  • the surfaces 80 facing the two side walls 78 have grooves 82 complementary to the grooves 74.
  • the bearing surface 26 is formed on the crosspiece 52 opposite the channel 76.
  • the distance between the bearing surfaces 24 and 26 is defined.
  • the spacer 46 is engaged on the pad 38 as illustrated in Figure 3.
  • the spacing of the spacer 46 and the surface 24 is adjusted by choosing the relative position of the grooves 42, 44 engaged one in the other, and in particular by engaging a determined number of protruding profiles and in complementary hollow.
  • the spacer 46 is put in place by sliding relative to the first body 30 in the direction defined by the complementary grooves 42, 44.
  • the base 50 is then placed on the spacer 46 in order to partially cover it.
  • the spacer is then partially received in the bowl 64.
  • the surfaces 60 and 70 are applied one on the other side, while the lateral surfaces 68 extend opposite the opposite open ends of screed 54.
  • the cross member 52 is finally positioned on the base 50 by engagement complementary grooves 74, 80.
  • the position of the cross member 52 is chosen by engagement of the stud 72 at the desired location in the groove 76.
  • the spacer 46 is held on the pad 38 and cannot be released from it. Indeed, the surfaces 68 of the bowl, extending opposite the ends not grooved stud 38 constitute stops preventing any movement of the spacer 46 relative to the first body 30 in the direction of the grooves 42, 44.
  • the surfaces 70 constitute stops ensuring a maintenance engaging complementary grooves 42, 44.
  • the surfaces 60 and 70 being inclined, these form cam and cam follower surfaces which, under the action of the bringing together of the two surfaces 24, 26, tend to urge the lips 56 of the spacer toward each other and thus ensure even stronger engagement grooves 42, 44.
  • Such coil shims allow the spacing between the Opposite bearing surfaces. This setting is obtained by choosing the number of splines engaged. So these shims can be used in different types of transformers, without the need for each type of transformer to make a new specific block.
  • the manufacturing cost of the transformer is thus reduced.
  • Figures 5 and 6 show elements of a variant for producing a wedge according to the invention.
  • a first body marked 130 visible in FIG. 5 is intended to be used replacing the first body 130 of the wedge illustrated in FIGS. 2 to 4.
  • a spacer 146 intended to be used as a replacement spacer 46.
  • FIGS. 5 and 6 the elements identical or analogous to those of first embodiment are designated by the same reference number to which has been added 100.
  • the first body 130 differs from the body 30 only in the shape of the pad 38 protruding from the surface of the plate 134.
  • the stud 138 has a cylindrical lateral surface 202. The axis of this surface cylindrical extends perpendicular to the bearing surface 124 of the wedge on the end of the spool.
  • the lateral surface 202 has annular grooves 142 extending along the entire periphery of the stud. These grooves generally extend parallel to the bearing surface 124. They each have an identical shape the shape of the grooves made on the pad 38.
  • the spacer 146 has like the spacer 46, two lips 156 extending generally parallel to each other. These lips have on their facing surfaces, substantially in their middle parts, 204 depressions defined by cylindrical surfaces opposite 206. These cylindrical surfaces 206 are generated by a same generator and constitute parts of a cylinder extending perpendicularly at cross member 158 of the spacer. They delimit a housing of revolution suitable for receiving stud 138. For this purpose, the diameter of the cylinder defined by the surface 206 is equal to the diameter of the pad 138.
  • the internal surfaces of the lips 156 have, according to all their lengths of the grooves 144. These grooves extend over the cylindrical surfaces 206.
  • These grooves have shapes identical to the grooves 44 and extend parallel to each other.
  • the crosspiece 158 has a central orifice 210 through from which a depression 204 is visible.
  • the first body 130 and the spacer 146 are intended to be used with a base 50 and a cross member 52 as illustrated in FIG. 2.
  • the spacer 146 When mounting the shim and adjusting its thickness, the spacer 146 is engaged on the pad 138. To do this, the pad 138 is introduced between the spacer lips 156. Ribs 142 are engaged with a number complementary ribs 144 corresponding to the desired distance between the two opposite surfaces of the wedge.
  • the two lips 156 gradually move apart by elastic deformation cross member 158 to allow movement of the pad 138. This pad is displaced, along the length of the ribs until it is received in the depressions 204.
  • the lips 156 relax, since they are not no longer subject to a constraint aimed at removing them due to the presence of the stud 138.
  • the complementary ribs formed on the stud and on the surfaces cylindrical 206 remain in engagement, thus ensuring an axial positioning of the first body 130 and spacer 136.
  • the base 50 is then engaged on the spacer 146 in order to ensure, by effect wedge and as previously explained, a bringing together of the two lips 156 thus tending to accentuate the cooperation of complementary grooves. Finally, the cross member 52 is placed on the base 50.
  • the pad 138 is susceptible to be moved in rotation relative to the spacer 146 around the axis of the stud.
  • the pad 138 is held axially between the two depressions 204 with a cylindrical surface, the concavities of the cylindrical surfaces 206 and the lateral surface 202 of the stud being identical.
  • the crosspiece 52 can be positioned angularly relative to the first body applied to the end of the coil, facilitating thus mounting the transformer.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)

Abstract

The coil holder (22) is placed between a coil end and a transformer structure element with a surface attached to the coil end and a transformer structure element with a surface attached to the coil and a second surface attached to the transformer structure. There is an adjustable mechanism (28) for the opposing attachment surfaces maintaining the surfaces separated following two distinct configurations, with different separation intervals.

Description

La présente invention concerne une cale de bobine pour un transformateur destinée à être interposée entre l'extrémité d'une bobine et un élément de structure du transformateur, du type comportant une première surface d'appui sur la bobine et une seconde surface opposée d'appui sur la structure du transformateur.The present invention relates to a coil shim for a transformer. intended to be interposed between the end of a coil and an element of structure of the transformer, of the type comprising a first bearing surface on the coil and a second opposite bearing surface on the structure of the transformer.

Les transformateurs électriques de forte puissance comportent généralement plusieurs bobines de forme cylindrique disposées les unes à côté des autres. Une carcasse délimite un circuit magnétique fermé le long duquel les bobines sont disposées. La carcasse comporte des colonnes engagées axialement à l'intérieur de chacune des bobines. De part et d'autre des tronçons de la carcasse reliant les colonnes engagées dans les bobines sont disposés des longerons métalliques entre lesquels sont enserrées les bobines, afin d'éviter que celles-ci ne se déplacent axialement suivant la longueur des colonnes les traversant.High power electrical transformers generally include several cylindrical coils arranged one next to the other. A carcass defines a closed magnetic circuit along which the coils are arranged. The carcass has columns axially engaged at inside each of the coils. On both sides of the carcass sections connecting the columns engaged in the coils are arranged metal beams between which the coils are enclosed, in order to prevent them from move axially along the length of the columns passing through them.

Ainsi, les bobines sont en appui sur ces longerons à chacune de leurs extrémités. Entre les longerons et les extrémités des bobines sont disposées des cales isolantes généralement réalisées en matière plastique permettant d'éviter tout jeu entre les bobines et les longerons.Thus, the coils are supported on these beams at each of their ends. Between the side members and the ends of the coils are arranged insulating shims generally made of plastic material to avoid any play between the coils and the side members.

Suivant le type de transformateur, l'intervalle à combler entre l'extrémité des bobines et les longerons disposés en regard est variable.Depending on the type of transformer, the gap to be filled between the end coils and side members arranged opposite is variable.

Aussi, il est nécessaire de fabriquer, pour chaque type de transformateur, des cales ayant des dimensions spécifiquement adaptées au transformateur considéré. Le coût du transformateur se trouve donc augmenté du fait de la nécessité de fabriquer des cales spécifiques.Also, it is necessary to manufacture, for each type of transformer, shims having dimensions specifically adapted to the transformer considered. The cost of the transformer is therefore increased due to the need to manufacture specific shims.

L'invention a pour but de proposer des cales de bobine pour transformateur et un transformateur les incorporant dont le coût est réduit.The object of the invention is to propose bobbin wedges for transformer. and a transformer incorporating them, the cost of which is reduced.

A cet effet, l'invention a pour objet une cale de bobine pour un transformateur du type précité, caractérisée en ce qu'elle comporte des moyens réglables d'écartement des surfaces d'appui opposées adaptés pour maintenir les deux surfaces d'appui écartées suivant au moins deux configurations distinctes dans lesquelles les intervalles réparant les deux surfaces d'appui sont différents.To this end, the invention relates to a coil shim for a transformer of the aforementioned type, characterized in that it comprises adjustable means for opposing bearing surfaces adapted to hold the two bearing surfaces spaced apart according to at least two distinct configurations in which the intervals repairing the two bearing surfaces are different.

Suivant des modes particuliers de réalisation, la cale de bobine comporte l'une ou plusieurs des caractéristiques suivantes :

  • lesdits moyens réglables d'écartement comportent un premier et un second corps portant chacun l'une des premières et seconde surfaces d'appui, lesdits corps comportant des profils d'emboítement complémentaires adaptés pour un emboítement dans au moins deux positions relatives distinct correspondant aux dites configurations distinctes ;
  • lesdits profils d'emboítement complémentaires des premier et second corps comportent des cannelures complémentaires ;
  • lesdites cannelures complémentaires s'étendent suivant une direction généralement parallèle à au moins l'une des surfaces d'appui ;
  • les cannelures complémentaires présentent des flancs essentiellement plats appliqués l'un sur l'autre lors de la mise en compression de ladite cale entre ses deux surfaces d'appui, et lesdits flancs appliqués l'un sur l'autre s'étendent parallèlement à au moins l'une des surfaces d'appui ;
  • les cannelures ont un pas compris entre 0,5 et 2 millimètres ;
  • le nombre de cannelures est compris entre 2 et 10 ;
  • l'un des corps comporte un plot présentant une surface latérale généralement de révolution d'axe s'étendant sensiblement perpendiculairement à la surface d'appui associée, et l'autre corps comporte une cavité délimitant une surface latérale généralement de révolution complémentaire à la surface latérale du plot, et lesdits profils d'emboítement complémentaire sont ménagés sur les surfaces généralement de révolution des premier et second corps ;
  • l'un des corps comporte un plot s'étendant généralement perpendiculairement à la surface d'appui associée, et l'autre corps délimite une chape présentant deux lèvres opposées enchâssant ledit plot, lesdits profils d'emboítement complémentaires étant ménagés sur les surfaces en regard des deux lèvres et les surfaces correspondantes du plot ;
  • le second corps comporte une entretoise sur laquelle est ménagé un profil d'emboítement et un patin délimitant ladite surface d'appui du second corps, et ledit patin comporte au moins une surface de butée adaptée pour maintenir en prise les profils d'emboítement complémentaires ;
  • l'entretoise et le patin comportent des surfaces de came / contre-came adaptées pour assurer une mise en prise des profils d'emboítement complémentaires sous l'action du rapprochement des deux surfaces d'appui ; et
  • la chape est délimitée par l'entretoise et le patin définit une cuvette de réception d'au moins une partie de la chape engagée autour du plot.
According to particular embodiments, the coil shim has one or more of the following characteristics:
  • said adjustable spacing means comprise a first and a second body each carrying one of the first and second bearing surfaces, said bodies comprising complementary interlocking profiles suitable for interlocking in at least two distinct relative positions corresponding to said separate configurations;
  • said complementary nesting profiles of the first and second bodies have complementary grooves;
  • said complementary grooves extend in a direction generally parallel to at least one of the bearing surfaces;
  • the complementary grooves have essentially flat flanks applied to one another during the compression of said shim between its two bearing surfaces, and said flanks applied to one another extend parallel to the less one of the bearing surfaces;
  • the grooves have a pitch of between 0.5 and 2 millimeters;
  • the number of splines is between 2 and 10;
  • one of the bodies comprises a stud having a lateral surface generally of axis revolution extending substantially perpendicular to the associated bearing surface, and the other body comprises a cavity delimiting a lateral surface generally of revolution complementary to the surface lateral of the stud, and said complementary nesting profiles are formed on the surfaces generally of revolution of the first and second bodies;
  • one of the bodies comprises a stud extending generally perpendicular to the associated bearing surface, and the other body delimits a yoke having two opposite lips embedding said stud, said complementary interlocking profiles being formed on the facing surfaces of the two lips and the corresponding surfaces of the stud;
  • the second body comprises a spacer on which is provided a nesting profile and a shoe defining said bearing surface of the second body, and said shoe comprises at least one abutment surface adapted to hold the complementary nesting profiles in engagement;
  • the spacer and the shoe have cam / cam follower surfaces adapted to ensure engagement of the complementary nesting profiles under the action of the bringing together of the two bearing surfaces; and
  • the yoke is delimited by the spacer and the shoe defines a bowl for receiving at least part of the yoke engaged around the stud.

L'invention a en outre pour objet un transformateur comportant au moins une bobine et au moins un élément de structure, caractérisé en ce qu'il comporte au moins une cale de bobine telle que définie ci-dessus, disposée entre une extrémité de la ou chaque bobine et le ou chaque élément de structure.The invention further relates to a transformer comprising at at least one coil and at least one structural element, characterized in that it comprises at least one coil shim as defined above, arranged between one end of the or each coil and the or each structural element.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite se référant aux dessins sur lesquels :

  • La figure 1 est une vue partielle et en perspective d'un transformateur selon l'invention ;
  • La figure 2 est une vue en perspective éclatée d'une cale selon l'invention disposée à l'extrémité d'une bobine ;
  • La figure 3 est une vue en coupe transversale de la cale assemblée selon l'invention ;
  • La figure 4 est une vue en perspective d'un élément de la cale selon l'invention ; et
  • Les figures 5 et 6 sont des vues en perspective d'une variante de réalisation de deux pièces de la cale de la figure 1.
The invention will be better understood on reading the description which follows, given solely by way of example, and made with reference to the drawings in which:
  • Figure 1 is a partial perspective view of a transformer according to the invention;
  • Figure 2 is an exploded perspective view of a shim according to the invention disposed at the end of a coil;
  • Figure 3 is a cross-sectional view of the assembled shim according to the invention;
  • Figure 4 is a perspective view of an element of the wedge according to the invention; and
  • FIGS. 5 and 6 are perspective views of an alternative embodiment of two parts of the wedge of FIG. 1.

Sur la figure 1 est représenté, un transformateur triphasé 10. Celui-ci comporte trois bobines 12A, 12B, 12C de forme générale cylindrique s'étendant parallèlement les unes aux autres. Ces bobines sont disposées dans un même plan. Le transformateur comporte un circuit magnétique 14, comprenant trois colonnes 16A, 16B, 16C engagées axialement dans les bobines 12A, 12B, 12C. Ces colonnes sont reliées les unes aux autres par des culasses inférieures et supérieures 18 dont une seule est représentée sur la figure 1.In Figure 1 is shown, a three-phase transformer 10. This comprises three coils 12A, 12B, 12C of generally cylindrical shape extending parallel to each other. These coils are arranged in the same plan. The transformer has a magnetic circuit 14, comprising three columns 16A, 16B, 16C engaged axially in the coils 12A, 12B, 12C. These columns are connected to each other by lower and upper cylinder heads 18 of which only one is shown in FIG. 1.

Des longerons 20 sont disposés de part et d'autres des culasses suivant leur longueur. Les bobines 12A, 12B, 12C sont maintenues fixes axialement suivant la longueur des colonnes 16A, 16B, 16C en étant enserrées entre les longerons 20 opposés. Entre les extrémités de chaque bobine et les longerons 20 sont disposées des cales 22 selon l'invention.Longers 20 are arranged on either side of the following cylinder heads their length. The coils 12A, 12B, 12C are held axially fixed along the length of the columns 16A, 16B, 16C being sandwiched between the side members 20 opposites. Between the ends of each coil and the side members 20 shims 22 are arranged according to the invention.

Une telle cale est représentée en perspective éclatée sur la figure 2, et en vue en bout, avec arrachement partiel sur la figure 3.Such a wedge is shown in exploded perspective in FIG. 2, and in end view, with partial cutaway in Figure 3.

Toutes les cales d'un transformateur sont identiques. Elles sont réalisées entièrement en matière plastique. Elles comportent une surface 24 d'appui sur la tranche d'une bobine et une surface 26 d'appui sur la surface du longeron 20 tournée vers la bobine. Avantageusement, un tampon amortisseur, par exemple en silicone est interposé entre la surface d'appui 24 et l'extrémité de la bobine.All the shims of a transformer are identical. They are made entirely made of plastic. They have a support surface 24 on the edge of a coil and a support surface 26 on the surface of the spar 20 facing the coil. Advantageously, a damping pad, for example silicone is interposed between the bearing surface 24 and the end of the coil.

Ces deux surfaces d'appui opposées 24, 26 s'étendent généralement parallèlement l'une à l'autre et sont écartées l'une de l'autre d'une intervalle prédéterminé correspondant à la distance souhaitée entre l'extrémité de la bobine et le longeron associé.These two opposite bearing surfaces 24, 26 generally extend parallel to each other and are spaced from each other by a predetermined interval corresponding to the desired distance between the end of the spool and the associated spar.

Selon l'invention, chaque cale 22 comporte des moyens réglables 28 d'écartement des surfaces d'appui opposées 24, 26 adaptés pour maintenir les deux surfaces écartées suivant au moins deux configurations distinctes dans lesquelles les intervalles séparant les deux surfaces d'appui sont différents.According to the invention, each wedge 22 comprises adjustable means 28 for spacing opposite bearing surfaces 24, 26 adapted to maintain the two spaced apart surfaces according to at least two distinct configurations in which the intervals separating the two bearing surfaces are different.

La surface 24 d'appui sur l'extrémité de la bobine est définie sur un premier corps 30 de la cale alors que la surface 26 d'appui sur le longeron 20 est définie sur un second corps 32 de la cale constitué lui-même d'un ensemble de pièces tel qu'illustré sur la figure 2.The support surface 24 on the end of the coil is defined on a first body 30 of the wedge while the surface 26 of bearing on the beam 20 is defined on a second body 32 of the wedge itself consisting of a set of parts as shown in figure 2.

Ces premier et second corps 30 et 32 comportent des profils d'emboítement complémentaires adaptés pour un emboítement des deux corps l'un avec l'autre dans au moins deux positions relatives, assurant ainsi le réglage de l'écartement des surfaces d'appui opposées 24, 26.These first and second bodies 30 and 32 have profiles of complementary sockets suitable for interlocking of the two bodies with each other in at least two relative positions, thereby ensuring adjustment the spacing of the opposite bearing surfaces 24, 26.

Plus précisément, le premier corps 30 comporte une plaque plane 34 dont une face forme la surface d'appui 24. Cette surface d'appui est bordée d'un coté par un rebord 36 venu de matière et adapté pour prendre appui sur la surface latérale intérieure de la bobine par exemple 12A.More specifically, the first body 30 comprises a flat plate 34 one face of which forms the bearing surface 24. This bearing surface is bordered by a dimensioned by a rim 36 made of material and adapted to bear on the surface inner side of the coil, for example 12A.

Le corps 30 comporte un plot 38 faisant saillie par rapport à la surface de la plaque 34 du coté opposé à la surface d'appui 24. Ce plot 38 s'étend dans la partie médiane de la plaque 34 sur l'essentiel de la longueur de celle-ci, cette longueur s'étendant suivant le rayon de la bobine.The body 30 comprises a stud 38 projecting relative to the surface of the plate 34 on the side opposite to the bearing surface 24. This stud 38 extends in the median part of the plate 34 over most of its length, this length extending along the radius of the coil.

Le plot 34 présente, à son sommet, une surface plane 40 et, latéralement, deux surfaces latérales opposées 41 s'étendant parallèlement l'une à l'autre. Ces surfaces latérales 41 s'étendent suivant la longueur de la plaque 34, perpendiculairement au rebord 36 d'appui sur la bobine. Lorsque la cale est montée sur la bobine, les surfaces latérales 41 s'étendent sensiblement radialement par rapport à la bobine.The stud 34 has, at its top, a flat surface 40 and, laterally, two opposite side surfaces 41 extending parallel to one another the other. These lateral surfaces 41 extend along the length of the plate 34, perpendicular to the flange 36 bearing on the coil. When the wedge is mounted on the coil, the lateral surfaces 41 extend substantially radially relative to the coil.

Les surfaces 41 présentent des profils d'emboítement adaptés pour coopérer avec le corps complémentaire 32 de la cale. Avantageusement, ces profils d'emboítement comportent des cannelures longitudinales 42 s'étendant suivant toute la longueur du plot 38. Ces cannelures s'étendent généralement parallèlement à la surface d'appui 24.The surfaces 41 have nesting profiles suitable for cooperate with the complementary body 32 of the wedge. Advantageously, these profiles interlocking have longitudinal grooves 42 extending along the entire length of the stud 38. These grooves generally extend parallel to the bearing surface 24.

Comme illustré sur la Figure 3 à plus grande échelle, chaque nervure délimitant les cannelures 42 comporte deux flancs opposés constitués de surfaces planes. Un premier flanc 42A opposé à la surface d'appui 24 s'étend essentiellement parallèlement à cette surface d'appui. Le second flanc 42B est incliné par rapport à la surface d'appui 24. Ainsi, les cannelures définissent un ensemble de flancs 42A parallèles à la surface d'appui 24 et échelonnés les uns au-dessus des autres. Ces flancs 42A forment des surfaces d'appui pour le second corps 32.As illustrated in Figure 3 on a larger scale, each rib delimiting the grooves 42 has two opposite flanks made up of surfaces planar. A first sidewall 42A opposite the bearing surface 24 extends essentially parallel to this bearing surface. The second side 42B is inclined by relative to the bearing surface 24. Thus, the grooves define a set of sides 42A parallel to the bearing surface 24 and staggered one above the other. These sides 42A form bearing surfaces for the second body 32.

Le nombre de nervures délimitées par ces cannelures est compris de préférence entre 2 et 10 et est avantageusement sensiblement égal à 5. Le pas de ces cannelures est compris entre 0,5 et 2 millimètres.The number of ribs delimited by these grooves is comprised of preferably between 2 and 10 and is advantageously substantially equal to 5. The pitch of these grooves is between 0.5 and 2 millimeters.

Des profils d'emboítement complémentaires 44 sont ménagés sur le second corps 32 de la cale.Complementary interlocking profiles 44 are provided on the second body 32 of the hold.

Ce dernier comporte une entretoise 46 et un patin de support 48 sur lequel est ménagé la surface d'appui 26. Ce patin de support est lui même constitué d'un socle 50 et d'une traverse 52.The latter comprises a spacer 46 and a support pad 48 on which is provided the bearing surface 26. This support pad itself is constituted a base 50 and a cross member 52.

L'entretoise 46 présente généralement la forme d'un pontet et délimite une chape 54. Le pontet 54 comporte deux lèvres 56 reliées l'une à l'autre par une traverse 58. Les profils d'emboítement 44 sont délimités sur les surfaces latérales intérieures des lèvres, c'est-à-dire sur leurs surfaces en regard. Ces profils d'emboítement sont constitués de cannelures s'étendant parallèlement à la traverse 58. Ces cannelures ont des caractéristiques complémentaires aux cannelures 42 portées par les parois latérales du plot 38. Elles s'étendent suivant des surfaces parallèles.The spacer 46 generally has the form of a trigger guard and delimits a yoke 54. The trigger guard 54 has two lips 56 connected to each other by a crosspiece 58. The interlocking profiles 44 are delimited on the lateral surfaces interior of the lips, that is to say on their facing surfaces. These profiles socket consist of grooves extending parallel to the crosspiece 58. These grooves have additional characteristics to the grooves 42 carried by the side walls of the stud 38. They extend along surfaces parallel.

Plus précisément, chaque nervure délimitant les cannelures comporte un flanc d'appui 44A opposé à la surface d'appui 26. Ce flanc d'appui s'étend parallèlement à la surface d'appui 26. Il est adapté pour s'appuyer sur un flanc d'appui complémentaire 42A des cannelures du premier corps 30. En outre, chaque cannelure comporte un flanc 44B incliné par rapport à la surface d'appui 26.More precisely, each rib delimiting the grooves comprises a support side 44A opposite the support surface 26. This support side extends parallel to the bearing surface 26. It is adapted to rest on a side complementary support 42A of the grooves of the first body 30. In addition, each groove has a side 44B inclined relative to the bearing surface 26.

La longueur de l'entretoise mesurée suivant la direction des cannelures est égale à la longueur du plot 38 mesurée également suivant la direction des cannelures. The length of the spacer measured in the direction of the grooves is equal to the length of the stud 38 also measured in the direction of the splines.

Les surfaces latérales extérieures 60 ménagées sur les lèvres 56 de l'entretoise sont inclinées l'une par rapport à l'autre et convergent l'une vers l'autre suivant la direction de la traverse 58.The outer lateral surfaces 60 formed on the lips 56 of the spacer are inclined relative to each other and converge towards each other following the direction of the cross 58.

Comme illustré sur la figure 4, le socle 50 comporte une base 62 généralement carrée. L'une des faces de la base est évidée et délimite une cuvette 64 de réception partielle de l'entretoise 46 et notamment d'une partie de celle-ci engagée autour du plot 38.As illustrated in Figure 4, the base 50 has a base 62 generally square. One of the faces of the base is hollowed out and delimits a bowl 64 partial reception of the spacer 46 and in particular of a part thereof engaged around stud 38.

Cette cuvette 64 présente un fond plat 66, bordé par quatre parois latérales. Deux parois latérales opposées 68 s'étendent parallèlement l'une à l'autre. Leur écartement est égal à la longueur de l'entretoise 28 mesurée suivant la direction des cannelures. La cuvette est en outre délimitée par deux surfaces latérales planes opposées 70 ayant des génératrices parallèles. Ces surfaces sont inclinées et convergent l'une vers l'autre en direction du fond de la cuvette. L'inclinaison des surfaces 70 est identique à l'inclinaison des surfaces 60 de l'entretoise.This bowl 64 has a flat bottom 66, bordered by four side walls. Two opposite side walls 68 extend parallel to each other. Their spacing is equal to the length of the spacer 28 measured in the direction grooves. The bowl is further delimited by two lateral surfaces opposite planes 70 having parallel generatrices. These surfaces are tilted and converge towards each other towards the bottom of the bowl. The inclination of the surfaces 70 is identical to the inclination of the surfaces 60 of the spacer.

Le socle 50 comporte un pilier 72 de liaison de la traverse 52. Ce pilier fait saillie par rapport à la base 62 au centre de sa face opposée à celle dans laquelle est ménagée la cuvette 64. Le pilier 72 présente latéralement des cannelures 74. Ces cannelures s'étendent généralement suivant la hauteur du pilier.The base 50 includes a pillar 72 for connecting the cross member 52. This pillar protrudes from the base 62 in the center of its face opposite to that in which is provided the bowl 64. The pillar 72 has laterally grooves 74. These grooves generally extend along the height of the pillar.

La traverse 52 présente un canal 76 délimité par deux parois latérales 78 parallèles l'une à l'autre. Les surfaces 80 en regard des deux parois latérales 78 présentent des cannelures 82 complémentaires aux cannelures 74.The cross member 52 has a channel 76 delimited by two side walls 78 parallel to each other. The surfaces 80 facing the two side walls 78 have grooves 82 complementary to the grooves 74.

La surface d'appui 26 est formée sur la traverse 52 à l'opposé du canal 76.The bearing surface 26 is formed on the crosspiece 52 opposite the channel 76.

Avant l'installation de la cale, l'écartement séparant les surfaces d'appui 24 et 26 est défini.Before installing the shim, the distance between the bearing surfaces 24 and 26 is defined.

A cet effet, l'entretoise 46 est engagée sur le plot 38 comme illustré sur la figure 3. L'écartement de l'entretoise 46 et de la surface 24 est ajusté en choisissant la position relative des cannelures 42, 44 engagées les unes dans les autres, et notamment par mise en prise d'un nombre déterminé de profils en saillie et en creux complémentaires.To this end, the spacer 46 is engaged on the pad 38 as illustrated in Figure 3. The spacing of the spacer 46 and the surface 24 is adjusted by choosing the relative position of the grooves 42, 44 engaged one in the other, and in particular by engaging a determined number of protruding profiles and in complementary hollow.

L'entretoise 46 est mise en place par coulissement par rapport au premier corps 30 suivant la direction définie par les cannelures complémentaires 42, 44. The spacer 46 is put in place by sliding relative to the first body 30 in the direction defined by the complementary grooves 42, 44.

Le socle 50 est ensuite disposé sur l'entretoise 46 afin de couvrir partiellement celle-ci. L'entretoise est alors partiellement reçue dans la cuvette 64. Les surfaces 60 et 70 sont appliquées les unes sur les autres latérales, alors que les surfaces latérales 68 s'étendent en regard des extrémités ouvertes opposées de la chape 54.The base 50 is then placed on the spacer 46 in order to partially cover it. The spacer is then partially received in the bowl 64. The surfaces 60 and 70 are applied one on the other side, while the lateral surfaces 68 extend opposite the opposite open ends of screed 54.

La traverse 52 est enfin positionnée sur le socle 50 par mise en prise des cannelures complémentaires 74, 80. La position de la traverse 52 est choisie par engagement du plot 72 à l'endroit souhaité dans la rainure 76.The cross member 52 is finally positioned on the base 50 by engagement complementary grooves 74, 80. The position of the cross member 52 is chosen by engagement of the stud 72 at the desired location in the groove 76.

Après réglage de la butée, celle-ci est implantée dans le transformateur entre une bobine et un longeron.After adjusting the stop, it is installed in the transformer between a coil and a spar.

Après montage de la butée, et alors que des forces visant à rapprocher les surfaces 24 et 26 sont appliquées sur la cale par la bobine et le longeron, on comprend que l'entretoise 46 est maintenue sur le plot 38 et ne peut s'en dégager. En effet, les surfaces 68 de la cuvette, s'étendant en regard des extrémités non cannelées du plot 38 constituent des butées interdisant tout déplacement de l'entretoise 46 par rapport au premier corps 30 suivant la direction des cannelures 42, 44.After mounting the stop, and while forces aiming to bring surfaces 24 and 26 are applied to the shim by the coil and the spar, understands that the spacer 46 is held on the pad 38 and cannot be released from it. Indeed, the surfaces 68 of the bowl, extending opposite the ends not grooved stud 38 constitute stops preventing any movement of the spacer 46 relative to the first body 30 in the direction of the grooves 42, 44.

En outre, les surfaces 70 constituent des butées assurant un maintien en prise des cannelures complémentaires 42, 44. Les surfaces 60 et 70 étant inclinées, celles-ci forment des surfaces de came et contre-came qui, sous l'action du rapprochement des deux surfaces 24, 26, tendent à solliciter les lèvres 56 de l'entretoise l'une vers l'autre et assurent ainsi une mise en prise encore plus forte des cannelures 42, 44.In addition, the surfaces 70 constitute stops ensuring a maintenance engaging complementary grooves 42, 44. The surfaces 60 and 70 being inclined, these form cam and cam follower surfaces which, under the action of the bringing together of the two surfaces 24, 26, tend to urge the lips 56 of the spacer toward each other and thus ensure even stronger engagement grooves 42, 44.

De telles cales de bobines permettent de régler l'écartement entre les surfaces d'appui opposées. Ce réglage est obtenu par le choix du nombre de cannelures mises en prise. Ainsi, ces cales peuvent être utilisées dans différents types de transformateurs, sans qu'il soit nécessaire pour chaque type de transformateurs de fabriquer une nouvelle cale spécifique.Such coil shims allow the spacing between the Opposite bearing surfaces. This setting is obtained by choosing the number of splines engaged. So these shims can be used in different types of transformers, without the need for each type of transformer to make a new specific block.

Le coût de fabrication du transformateur se trouve ainsi réduit.The manufacturing cost of the transformer is thus reduced.

Sur les figures 5 et 6 sont présentés des éléments constitutifs d'une variante de réalisation d'une cale selon l'invention.Figures 5 and 6 show elements of a variant for producing a wedge according to the invention.

Un premier corps noté 130 visible sur la figure 5 est destiné à être utilisé en remplacement du premier corps 130 de la cale illustrée aux figures 2 à 4. Sur la figure 6 est représentée une entretoise 146 destinée à être utilisée en remplacement de l'entretoise 46.A first body marked 130 visible in FIG. 5 is intended to be used replacing the first body 130 of the wedge illustrated in FIGS. 2 to 4. In FIG. 6 is shown a spacer 146 intended to be used as a replacement spacer 46.

Sur les figures 5 et 6, les éléments identiques ou analogues à ceux du premier mode de réalisation sont désignés par le même numéro de référence auquel a été ajouté 100.In FIGS. 5 and 6, the elements identical or analogous to those of first embodiment are designated by the same reference number to which has been added 100.

Le premier corps 130 ne diffère du corps 30 que par la forme du plot 38 faisant saillie par rapport à la surface de la plaque 134. Dans ce mode de réalisation, le plot 138 présente une surface latérale cylindrique 202. L'axe de cette surface cylindrique s'étend perpendiculairement à la surface 124 d'appui de la cale sur l'extrémité de la bobine.The first body 130 differs from the body 30 only in the shape of the pad 38 protruding from the surface of the plate 134. In this embodiment, the stud 138 has a cylindrical lateral surface 202. The axis of this surface cylindrical extends perpendicular to the bearing surface 124 of the wedge on the end of the spool.

La surface latérale 202 présente des cannelures annulaires 142 s'étendant suivant toute la périphérie du plot. Ces cannelures s'étendent généralement parallèlement à la surface d'appui 124. Elles présentent chacune une forme identique à la forme des cannelures ménagées sur le plot 38.The lateral surface 202 has annular grooves 142 extending along the entire periphery of the stud. These grooves generally extend parallel to the bearing surface 124. They each have an identical shape the shape of the grooves made on the pad 38.

Par ailleurs, et comme illustré sur la figure 6, l'entretoise 146 présente comme l'entretoise 46, deux lèvres 156 s'étendant généralement parallèlement l'une à l'autre. Ces lèvres comportent sur leurs surfaces en regard, sensiblement dans leurs parties médianes, des dépressions 204 définies par des surfaces cylindriques en regard 206. Ces surfaces cylindriques 206 sont engendrées par une même génératrice et constituent des parties d'un cylindre s'étendant perpendiculairement à la traverse 158 de l'entretoise. Elles délimitent un logement de révolution propre à la réception du plot 138. A cet effet, le diamètre du cylindre défini par la surface 206 est égal au diamètre du plot 138.Furthermore, and as illustrated in FIG. 6, the spacer 146 has like the spacer 46, two lips 156 extending generally parallel to each other. These lips have on their facing surfaces, substantially in their middle parts, 204 depressions defined by cylindrical surfaces opposite 206. These cylindrical surfaces 206 are generated by a same generator and constitute parts of a cylinder extending perpendicularly at cross member 158 of the spacer. They delimit a housing of revolution suitable for receiving stud 138. For this purpose, the diameter of the cylinder defined by the surface 206 is equal to the diameter of the pad 138.

Les surfaces internes des lèvres 156 présentent suivant toutes leurs longueurs des cannelures 144. Ces cannelures se prolongent sur les surfaces cylindriques 206.The internal surfaces of the lips 156 have, according to all their lengths of the grooves 144. These grooves extend over the cylindrical surfaces 206.

Ces cannelures ont des formes identiques aux cannelures 44 et s'étendent parallèlement les unes aux autres.These grooves have shapes identical to the grooves 44 and extend parallel to each other.

Sur la figure 6, la traverse 158 présente un orifice central 210 au travers duquel une dépression 204 est visible.In FIG. 6, the crosspiece 158 has a central orifice 210 through from which a depression 204 is visible.

Le premier corps 130 et l'entretoise 146 sont destinés à être utilisés avec un socle 50 et une traverse 52 tels qu'illustrés sur la figure 2.The first body 130 and the spacer 146 are intended to be used with a base 50 and a cross member 52 as illustrated in FIG. 2.

Lors du montage de la cale et du réglage de son épaisseur, l'entretoise 146 est engagée sur le plot 138. Pour ce faire, le plot 138 est introduit entre les lèvres 156 de l'entretoise. Les nervures 142 sont mises en prise avec un nombre de nervures complémentaires 144 correspondant à la distance souhaitée entre les deux surfaces opposées de la cale.When mounting the shim and adjusting its thickness, the spacer 146 is engaged on the pad 138. To do this, the pad 138 is introduced between the spacer lips 156. Ribs 142 are engaged with a number complementary ribs 144 corresponding to the desired distance between the two opposite surfaces of the wedge.

Les deux lèvres 156 s'écartent progressivement par déformation élastique de la traverse 158 afin de permettre le déplacement du plot 138. Ce plot est déplacé, suivant la longueur des nervures jusqu'à ce qu'il soit reçu dans les dépressions 204.The two lips 156 gradually move apart by elastic deformation cross member 158 to allow movement of the pad 138. This pad is displaced, along the length of the ribs until it is received in the depressions 204.

Dans cette position, les lèvres 156 se relâchent, puisqu'elles ne sont plus soumises à une contrainte visant les écarter du fait de la présence du plot 138. Toutefois, les nervures complémentaires ménagées sur le plot et sur les surfaces cylindriques 206 restent en prise, assurant ainsi un positionnement axial du premier corps 130 et de l'entretoise 136.In this position, the lips 156 relax, since they are not no longer subject to a constraint aimed at removing them due to the presence of the stud 138. However, the complementary ribs formed on the stud and on the surfaces cylindrical 206 remain in engagement, thus ensuring an axial positioning of the first body 130 and spacer 136.

Le socle 50 est alors engagé sur l'entretoise 146 afin d'assurer, par effet de cale et comme exposé précédemment, un rapprochement des deux lèvres 156 tendant ainsi à accentuer la coopération des cannelures complémentaires. Enfin, la traverse 52 est mise en place sur le socle 50.The base 50 is then engaged on the spacer 146 in order to ensure, by effect wedge and as previously explained, a bringing together of the two lips 156 thus tending to accentuate the cooperation of complementary grooves. Finally, the cross member 52 is placed on the base 50.

On conçoit que dans ce mode de réalisation, le plot 138 est susceptible d'être déplacé en rotation par rapport à l'entretoise 146 autour de l'axe du plot.It is understood that in this embodiment, the pad 138 is susceptible to be moved in rotation relative to the spacer 146 around the axis of the stud.

En effet, le plot 138 est maintenu axiallement entre les deux dépressions 204 à surface cylindrique, les concavités des surfaces cylindriques 206 et de la surface latéral 202 du plot étant identiques.Indeed, the pad 138 is held axially between the two depressions 204 with a cylindrical surface, the concavities of the cylindrical surfaces 206 and the lateral surface 202 of the stud being identical.

Ainsi, avec une telle cale, la traverse 52 peut être positionnée angulairement par rapport au premier corps appliqué sur l'extrémité de la bobine, facilitant ainsi le montage du transformateur.Thus, with such a shim, the crosspiece 52 can be positioned angularly relative to the first body applied to the end of the coil, facilitating thus mounting the transformer.

Claims (13)

Cale (22) de bobine pour un transformateur (10) destinée à être interposée entre une extrémité d'une bobine (12A, 12B, 12C), et un élément de structure (20) du transformateur, comportant une première surface d'appui (24) sur la bobine et une seconde surface opposée (26) d'appui sur la structure (20) du transformateur, caractérisée en ce qu'elle comporte des moyens réglables (28) d'écartement des surfaces d'appui opposées (24, 26) adaptés pour maintenir les deux surfaces d'appui (24, 26) écartées suivant au moins deux configurations distinctes dans lesquelles les intervalles réparant les deux surfaces d'appui sont différents.Coil wedge (22) for a transformer (10) intended to be interposed between one end of a coil (12A, 12B, 12C), and a structural element (20) of the transformer, comprising a first bearing surface ( 24) on the coil and a second opposite surface (26) bearing on the structure (20) of the transformer, characterized in that it comprises adjustable means (28) for spacing the opposite bearing surfaces (24, 26) adapted to keep the two bearing surfaces (24, 26) apart according to at least two distinct configurations in which the intervals repairing the two bearing surfaces are different. Cale selon la revendication 1, caractérisée en ce que lesdits moyens réglables d'écartement (28) comportent un premier et un second corps (30, 32) portant chacun l'une des premières et seconde surfaces d'appui (24, 26), lesdits corps (30, 32) comportant des profils d'emboítement complémentaires (42, 44,142 144) adaptés pour un emboítement dans au moins deux positions relatives distinct correspondant aux dites configurations distinctes.Wedge according to claim 1, characterized in that said adjustable spacing means (28) comprise a first and a second body (30, 32) each carrying one of the first and second bearing surfaces (24, 26), said bodies (30, 32) comprising complementary interlocking profiles (42, 44, 142 144) adapted for interlocking in at least two distinct relative positions corresponding to said distinct configurations. Cale selon la revendication 2, caractérisée en ce que lesdits profils d'emboítement complémentaires des premier et second corps (30, 32) comportent des cannelures complémentaires (42, 44; 142, 144).Wedge according to claim 2, characterized in that said complementary nesting profiles of the first and second body (30, 32) have complementary grooves (42, 44; 142, 144). Cale selon la revendication 3, caractérisée en ce que lesdites cannelures complémentaires (42, 44; 142, 144) s'étendent suivant une direction généralement parallèle à au moins l'une des surfaces d'appui (24, 26).Wedge according to claim 3, characterized in that said complementary grooves (42, 44; 142, 144) extend in a direction generally parallel to at least one of the bearing surfaces (24, 26). Cale selon la revendication 4, caractérisée en ce que les cannelures complémentaires (42, 44; 142, 144) présentent des flancs essentiellement plats appliqués l'un sur l'autre lors de la mise en compression de ladite cale entre ses deux surfaces d'appui (24, 26), et en ce que lesdits flancs appliqués l'un sur l'autre s'étendent parallèlement à au moins l'une des surfaces d'appui (24, 26).Wedge according to claim 4, characterized in that the complementary grooves (42, 44; 142, 144) have essentially flat sides applied to one another during the compression of said wedge between its two surfaces of support (24, 26), and in that said flanks applied one on the other extend parallel to at least one of the support surfaces (24, 26). Cale selon l'une quelconque des revendications 3 à 5, caractérisée en ce que les cannelures (42, 44; 142, 144) ont un pas compris entre 0,5 et 2 millimètres.Wedge according to any one of claims 3 to 5, characterized in that the grooves (42, 44; 142, 144) have a pitch between 0.5 and 2 millimeters. Cale selon l'une quelconque des revendications 3 à 6, caractérisée en ce que le nombre de cannelures (42, 44; 142, 144) est compris entre 2 et 10.Wedge according to any one of claims 3 to 6, characterized in that the number of splines (42, 44; 142, 144) is between 2 and 10. Cale selon l'une quelconque des revendications 2 à 7, caractérisée en ce que l'un des corps (130) comporte un plot (138) présentant une surface latérale généralement de révolution d'axe s'étendant sensiblement perpendiculairement à la surface d'appui associée (124), et en ce que l'autre corps (146) comporte une cavité délimitant une surface latérale généralement de révolution (206) complémentaire à la surface latérale du plot (138), et en ce que lesdits profils d'emboítement complémentaire (142,144) sont ménagés sur les surfaces généralement de révolution (202,206) des premier et second corps.Wedge according to any one of claims 2 to 7, characterized in that one of the bodies (130) comprises a stud (138) having a lateral surface generally of axis revolution extending substantially perpendicular to the surface of associated support (124), and in that the other body (146) comprises a cavity delimiting a lateral surface generally of revolution (206) complementary to the lateral surface of the stud (138), and in that said interlocking profiles complementary (142,144) are formed on the generally revolution surfaces (202,206) of the first and second bodies. Cale selon l'une quelconque des revendications 2 à 8, caractérisée en ce que l'un des corps (30, 32, 130, 146) comporte un plot (38, 138) s'étendant généralement perpendiculairement à la surface d'appui associée (24, 124), et en ce que l'autre corps (32,146) délimite une chape (54,154) présentant deux lèvres opposées (56,156) enchâssant ledit plot (38), lesdits profils d'emboítement complémentaires (42, 44; 142, 144) étant ménagés sur les surfaces en regard des deux lèvres (56,156) et les surfaces correspondantes du plot (38,138).Wedge according to any one of claims 2 to 8, characterized in that one of the bodies (30, 32, 130, 146) comprises a stud (38, 138) extending generally perpendicular to the associated bearing surface (24, 124), and in that the other body (32,146) delimits a yoke (54,154) having two opposite lips (56,156) encasing said stud (38), said complementary interlocking profiles (42, 44; 142, 144) being provided on the facing surfaces of the two lips (56,156) and the corresponding surfaces of the stud (38,138). Cale selon l'une quelconque des revendications 2 à 8, caractérisée en ce que le second corps (32) comporte une entretoise (46,146) sur laquelle est ménagé un profil d'emboítement (44) et un patin (48) délimitant ladite surface d'appui (26) du second corps, et en ce que ledit patin (48) comporte au moins une surface de butée (70) adaptée pour maintenir en prise les profils d'emboítement complémentaires (42, 44; 142, 144).Wedge according to any one of claims 2 to 8, characterized in that the second body (32) comprises a spacer (46,146) on which is formed a socket profile (44) and a shoe (48) delimiting said surface d 'support (26) of the second body, and in that said shoe (48) comprises at least one abutment surface (70) adapted to hold in engagement the complementary interlocking profiles (42, 44; 142, 144). Cale selon la revendication 9, caractérisée en ce que l'entretoise (46) et le patin (48) comportent des surfaces de came / contre-came (60, 70) adaptées pour assurer une mise en prise des profils d'emboítement complémentaires (42, 44; 142, 144) sous l'action du rapprochement des deux surfaces d'appui (24, 26).Wedge according to claim 9, characterized in that the spacer (46) and the shoe (48) have cam / cam follower surfaces (60, 70) adapted to ensure engagement of the complementary nesting profiles ( 42, 44; 142, 144) under the action of the bringing together of the two bearing surfaces (24, 26). Cale selon la revendication 9 et l'une des revendications 10 et 11, caractérisée en ce que la chape (54) est délimitée par l'entretoise (28) et le patin (48) définit une cuvette (64) de réception d'au moins une partie de la chape (54) engagée autour du plot (38).Wedge according to claim 9 and one of claims 10 and 11, characterized in that the yoke (54) is delimited by the spacer (28) and the shoe (48) defines a bowl (64) for receiving at at least part of the yoke (54) engaged around the stud (38). Transformateur comportant au moins une bobine (12A, 12B, 12C) et au moins un élément de structure (20), caractérisé en ce qu'il comporte au moins une cale (22) de bobine selon l'une quelconque des revendications précédentes, disposée entre une extrémité de la ou chaque bobine (12A, 12B, 12C) et le ou chaque élément de structure (20).Transformer comprising at least one coil (12A, 12B, 12C) and at least one structural element (20), characterized in that it comprises at least one coil wedge (22) according to any one of the preceding claims, arranged between one end of the or each coil (12A, 12B, 12C) and the or each structural element (20).
EP02291892A 2001-09-28 2002-07-25 Wedge for transformer coil and transformer comprising such a wedge Withdrawn EP1298681A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0112549 2001-09-28
FR0112549A FR2830369B1 (en) 2001-09-28 2001-09-28 COIL HOLDER FOR TRANSFORMER AND TRANSFORMER COMPRISING SAME

Publications (1)

Publication Number Publication Date
EP1298681A1 true EP1298681A1 (en) 2003-04-02

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EP02291892A Withdrawn EP1298681A1 (en) 2001-09-28 2002-07-25 Wedge for transformer coil and transformer comprising such a wedge

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EP (1) EP1298681A1 (en)
FR (1) FR2830369B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2117019A1 (en) * 2008-03-17 2009-11-11 Elettromeccanica di Marnate S.p.A. Modular device for clamping and positioning power transformer windings, particularly for a dry-type transformer with resin-encapsulated windings
ITMI20111618A1 (en) * 2011-09-08 2013-03-09 Tmc Italia S P A PRESSING DEVICE FOR A DRY ELECTRIC TRANSFORMER ISOLATED IN RESIN
IT201800003584A1 (en) * 2018-03-15 2019-09-15 Andrea Giorgio Colombo Fastening member for a pressing device for a resin-insulated dry electrical transformer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114823096B (en) * 2022-06-25 2022-10-21 深圳市万志宇科技有限公司 Electronic transformer with anti-creeping function

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009461A (en) * 1975-07-24 1977-02-22 General Electric Company Externally actuated clamping system for transformer windings incorporating a mechanical follow-up device
USH906H (en) * 1990-06-04 1991-04-02 The United States Of America As Represented By The United States Department Of Energy Wedge assembly for electrical transformer component spacing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009461A (en) * 1975-07-24 1977-02-22 General Electric Company Externally actuated clamping system for transformer windings incorporating a mechanical follow-up device
USH906H (en) * 1990-06-04 1991-04-02 The United States Of America As Represented By The United States Department Of Energy Wedge assembly for electrical transformer component spacing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2117019A1 (en) * 2008-03-17 2009-11-11 Elettromeccanica di Marnate S.p.A. Modular device for clamping and positioning power transformer windings, particularly for a dry-type transformer with resin-encapsulated windings
ITMI20111618A1 (en) * 2011-09-08 2013-03-09 Tmc Italia S P A PRESSING DEVICE FOR A DRY ELECTRIC TRANSFORMER ISOLATED IN RESIN
EP2568485A1 (en) * 2011-09-08 2013-03-13 TMC Italia S.p.A. Pressing device for a cast-resin dry-type electric transformer
IT201800003584A1 (en) * 2018-03-15 2019-09-15 Andrea Giorgio Colombo Fastening member for a pressing device for a resin-insulated dry electrical transformer
EP3540749A1 (en) * 2018-03-15 2019-09-18 Andrea Giorgio Colombo Retaining member for a pressing device for a cast-resin dry-type electric transformer

Also Published As

Publication number Publication date
FR2830369A1 (en) 2003-04-04
FR2830369B1 (en) 2003-12-26

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