WO2018235322A1 - Oil-filled transformer and production method for tank used therein - Google Patents

Oil-filled transformer and production method for tank used therein Download PDF

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Publication number
WO2018235322A1
WO2018235322A1 PCT/JP2018/001503 JP2018001503W WO2018235322A1 WO 2018235322 A1 WO2018235322 A1 WO 2018235322A1 JP 2018001503 W JP2018001503 W JP 2018001503W WO 2018235322 A1 WO2018235322 A1 WO 2018235322A1
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Prior art keywords
oil
filled transformer
tank
welding
welded
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PCT/JP2018/001503
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French (fr)
Japanese (ja)
Inventor
直道 工藤
桑原　正尚
潤一 石附
美稀 山崎
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株式会社日立産機システム
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Priority to CN201880005098.6A priority Critical patent/CN110073450A/en
Publication of WO2018235322A1 publication Critical patent/WO2018235322A1/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
    • H01F27/02—Casings
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties

Definitions

  • the present invention relates to an oil-filled transformer, and more particularly to a tank for an oil-filled transformer in which miniaturization, heat dissipation and strength are taken into consideration.
  • Oil-filled electrical devices such as oil-filled transformer tanks, generally contain insulating oil as an insulation medium for transformers.
  • the insulating oil is expanded by the temperature rise of the transformer, and the internal pressure of the tank rises, so the tank needs to have sufficient strength so as not to deform.
  • the heat dissipation performance which can control the temperature rise of insulating oil with low heat conduction is required.
  • Patent Document 1 discloses a tank of an oil-filled electrical device having a side plate in which a sheet material is bent in a corrugated shape to form a fin-like overhang portion and the inside of each overhang portion is formed as an overhang oil chamber.
  • the upper and lower end portions are narrowed inward to form a surface joint portion in close contact with each other, and the upper and lower end portions of the overhang portion are welded along the surface joint portion, and the welding line is made only uniaxial.
  • a convex or concave reinforcing bead is formed in the plate field of the projecting portion, and the reinforcing bead is intended to increase the mechanical strength of the overhanging portion.
  • Patent Document 1 when the internal pressure of the fin-like overhanging portion as the heat dissipating rib increases due to the temperature rise of the insulating oil in the tank, the reinforcing bead extends in the lateral and longitudinal directions of the overhanging portion. To improve the strength of the However, the reinforcement bead is provided on the heat dissipating rib to improve the strength, so the load on the surface joint of the heat dissipating rib is increased, a more advanced bonding method is required, and there is a problem of cost increase.
  • the insulating oil when the insulating oil is heated by energization of the coil conductor provided in the iron core, it rises upward, flows from there to the inside of the heat dissipating rib, and is cooled by the heat dissipating function of the heat dissipating rib. It circulates so that it descends from the outer peripheral side of and returns to the coil side. Therefore, in order to increase the heat dissipation performance, it is necessary to enlarge the heat dissipation rib in order to increase the heat dissipation area. Therefore, there is a problem that the entire oil-filled transformer is upsized.
  • An object of the present invention is to provide an oil-filled transformer in which the size of the oil-filled transformer is reduced and the heat dissipation and strength of the tank are taken into consideration.
  • the present invention in view of the above background art, is, for example, an oil-impregnated transformer in which an iron core-coil assembly composed of an iron core and a coil is housed in a tank and insulating oil is contained,
  • the tank includes a flange for attaching the lid, a bottom plate, and a body portion comprising side plates disposed between the flange and the bottom plate, and a plurality of embossed portions are formed on the surface of the body portion.
  • the body portion is formed by cylindrically welding a side plate on which the embossed portion is formed, and the welded portion is welded so as to hang on the embossed portion.
  • an oil-filled transformer which takes into consideration the miniaturization of the oil-filled transformer and the heat dissipation and strength of the tank.
  • FIG. 1 is a schematic perspective view of the entire tank in the present embodiment.
  • the tank 10 is provided with a flange 11 for attaching a lid, a bottom plate 12, and a body portion 13 consisting of a side plate disposed between the flange 11 and the bottom plate 12, thereby making it possible to use an iron core and a coil.
  • the assembled core-coil assembly and the insulating oil for insulating it are configured to be accommodated.
  • the body portion 13 is a sheet-like base plate, for example, formed by pressing a steel plate.
  • FIG. 2 is a cross-sectional view which looked the cross-section of the oil-impregnated transformer in a present Example from the top.
  • FIG. 2 shows an oil filled transformer of a three-phase three-leg structure consisting of U-phase, V-phase and W-phase.
  • an iron core-coil assembly 20 is accommodated for each phase in a rectangular parallelepiped tank 10, and insulating oil 30 is filled around it.
  • the iron core-coil assembly 20 is provided with coils 22 of respective phases on the legs of the iron core 21.
  • the coil 22 is composed of a primary coil portion 23 and a secondary coil portion 24.
  • FIG. 3 is a perspective view of the entire tank provided with a heat dissipating rib as a premise in the present embodiment.
  • a heat dissipating rib as a premise in the present embodiment.
  • FIG. 3 in order to increase the heat radiation area, it is conceivable to provide the heat radiation ribs 40 at the regular intervals on the entire outer periphery of the body portion 13 of the tank 10 according to the conventional tank structure.
  • a plurality of convex portions that is, the embossed portions 50 are formed on the body portion 13 of the tank.
  • FIG. 4 is a perspective view of the entire tank in the present embodiment.
  • a plurality of embossed portions 50 are formed on the body portion 13 of the tank.
  • the embossed portions 50 are arranged in parallel or in a staggered arrangement around the body 13 at predetermined intervals.
  • Each embossed portion 50 is formed, for example, in a hemispherical shape, and is continuously disposed to form a heat dissipation surface of high heat transfer.
  • the embossing part 50 is made into the convex part in FIG. 4, it is good also as a recessed part.
  • the embossed portion of the convex portion or the concave portion on the body portion of the tank, it is possible to widen the heat radiation area and to further improve the heat radiation performance while suppressing the upsizing of the entire oil-filled transformer. Moreover, the strength of the tank can be improved by forming the embossed portion of the convex portion or the concave portion.
  • FIG. 5 shows a schematic perspective view of the longitudinal section of the entire tank as viewed obliquely.
  • the embossed portion is omitted.
  • the longitudinal halves of the body portion 13 are embossed by pressing, bent and formed, and the longitudinal half after forming is viewed from the upper surface
  • two side plates which are U-shaped are joined and manufactured by welding.
  • the line AA in FIG. 5 is a portion where welding is performed, and shows a welding line.
  • FIG. 6 is an enlarged schematic view of a welded portion of the side plate constituting the body portion 13.
  • Line AA shows the weld line in FIG. In FIG. 6, the welding portion is welded between the flat plate portions 60 which are not provided with the embossed portion.
  • FIG. 7 welding is performed at a portion where the flat portion 60 and the end portion of the embossed portion 50 hang. Welding is carried out along a weld line, and a bead, which is a molten solidified metal during welding, has a certain width to form a weld. Therefore, according to the welding of FIG. 7, in order to weld an embossed part, the welding distance is extended rather than the linear distance of the longitudinal direction of a side plate. For this reason, there is an effect that strength is improved as compared with the case where the flat portions 60 of FIG.
  • FIG. 8 it welds in the part to which the flat part 60 and the half of the embossing part 50 hang. According to this, since welding is performed with the portion of higher curvature of the embossed portion, the welding distance is further extended as compared with the case of FIG. Therefore, there is a feature that the strength is further improved. In addition, three-dimensional welding is possible and strength can be further improved.
  • FIG. 9 is an example in which the end portions of the embossed portion 50 are welded to each other. Also in this example, the welding distance is longer than in the case where the flat plate portions 60 are welded together, so that the strength is improved.
  • the end of the embossed portion 50 and the half of the embossed portion 50 are welded. Also in this case, the welding distance is longer than in the case where the flat portions 60 are welded together, and further three-dimensional welding is possible, and the strength can be further improved.
  • welding is performed so that the welded portion hangs on the embossed portion, so that the welding distance is extended, and three-dimensional welding is possible, and the strength can be improved.
  • the side plates may be butted and welded, or the side plates may be overlapped to weld the end portions of the side plates.
  • the said embossing part can be used as a standard of positioning at the time of welding. Further, since the embossed portions are periodically arranged, the embossed portions themselves can be used as welding positions if the embossed portions of the connected side plates are overlapped and welded. In addition, you may provide the embossing part for exclusive use for positioning.
  • the embossed portion of the convex portion or the concave portion is formed on the side plate forming the body portion of the tank, bent and formed, and the welded portion is embossed when the side plate is welded in a tubular shape. Weld to hang on the part.
  • the size can be reduced without providing the heat dissipation rib in the tank, and the strength of the tank can be further improved in addition to the improvement of the heat dissipation property by the embossed portion and the improvement of the strength of the tank.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Transformer Cooling (AREA)

Abstract

The objective of the invention is to provide an oil-filled transformer wherein the heat-dissipating characteristics and the strength of the tank, and a size reduction of the oil-filled transformer, have been taken into consideration. In order to attain this objective, the oil-filled transformer which is filled with an insulating oil houses an iron core-coil assembly assembled from an iron core and a coil inside the tank, wherein the tank has a bottom plate, a flange for mounting a lid, and a trunk section comprising a side plate located between the flange and the bottom plate, the trunk section having a plurality of embossed parts formed on the surface thereof, and the trunk section being constituted by welding the side plate having the embossed parts formed thereon into a cylindrical shape, wherein a weld section is constituted by welding in such a manner as to overlap some of the embossed parts.

Description

油入変圧器及びそれに用いるタンクの製造方法Oil-filled transformer and method of manufacturing tank used therefor
　本発明は、油入変圧器に係り、特に小型化と放熱性と強度を考慮した油入変圧器のタンクに関する。 The present invention relates to an oil-filled transformer, and more particularly to a tank for an oil-filled transformer in which miniaturization, heat dissipation and strength are taken into consideration.
　一般に油入電気機器、例えば油入変圧器のタンクには、変圧器の絶縁媒体として絶縁油が入っている。その絶縁油は変圧器の通電熱で温度上昇することによって膨張し、タンクの内圧が上昇するので、タンクは変形しないように充分な強度を必要とする。また、熱伝導が低い絶縁油の温度上昇を抑制できる放熱性能が要求される。 Oil-filled electrical devices, such as oil-filled transformer tanks, generally contain insulating oil as an insulation medium for transformers. The insulating oil is expanded by the temperature rise of the transformer, and the internal pressure of the tank rises, so the tank needs to have sufficient strength so as not to deform. Moreover, the heat dissipation performance which can control the temperature rise of insulating oil with low heat conduction is required.
　この種のタンクの従来技術としては、特開昭５３－３５１２２号公報（特許文献１）がある。特許文献１は、シート材を波形に折曲げてひれ状張出部を形成し、各張出部内を張出油室に形成した側板を有する油入電気機器のタンクにおいて、前記張出部の上下端部を内方に絞り込んで密着した面接合部を形成するとともに、上記面接合部に沿って上記張出部の上下端部を溶接し、その溶接線を一軸のみとする一方、前記張出部の板場に凸状または凹状の補強用ビードを形成し、上記補強用ビードにより張出部の機械的強度の増大を図るようにしている。 As a prior art of this type of tank, there is JP-A-53-35122 (Patent Document 1). Patent Document 1 discloses a tank of an oil-filled electrical device having a side plate in which a sheet material is bent in a corrugated shape to form a fin-like overhang portion and the inside of each overhang portion is formed as an overhang oil chamber. The upper and lower end portions are narrowed inward to form a surface joint portion in close contact with each other, and the upper and lower end portions of the overhang portion are welded along the surface joint portion, and the welding line is made only uniaxial. A convex or concave reinforcing bead is formed in the plate field of the projecting portion, and the reinforcing bead is intended to increase the mechanical strength of the overhanging portion.
特開昭５３－３５１２２号公報JP-A-53-35122
　特許文献１に示す従来技術では、放熱リブとしてのひれ状張出部は、タンク内で絶縁油の温度上昇によって内圧が高くなった場合、補強用ビードにより張出部の横方向および縦方向に対しての強度向上を図っている。しかし、放熱リブに補強用ビードを設けて強度向上を図っている分、放熱リブの面接合部への負荷が大きくなり、より高度な接合方法が必要とされ、コストアップにつながる課題がある。 In the prior art shown in Patent Document 1, when the internal pressure of the fin-like overhanging portion as the heat dissipating rib increases due to the temperature rise of the insulating oil in the tank, the reinforcing bead extends in the lateral and longitudinal directions of the overhanging portion. To improve the strength of the However, the reinforcement bead is provided on the heat dissipating rib to improve the strength, so the load on the surface joint of the heat dissipating rib is increased, a more advanced bonding method is required, and there is a problem of cost increase.
　また、絶縁油は、鉄心に設けたコイルの導体の通電によって熱せられると、その上方に上昇し、そこから放熱リブの内部側に流れ、放熱リブの放熱作用によって冷却されることにより、放熱リブの外周側から下降してコイル側に戻るように循環する。そのため、放熱性能を上げるためには、放熱面積を大きくするために放熱リブを大きくする必要がある。したがって、油入変圧器全体が大型化してしまうという課題がある。 In addition, when the insulating oil is heated by energization of the coil conductor provided in the iron core, it rises upward, flows from there to the inside of the heat dissipating rib, and is cooled by the heat dissipating function of the heat dissipating rib. It circulates so that it descends from the outer peripheral side of and returns to the coil side. Therefore, in order to increase the heat dissipation performance, it is necessary to enlarge the heat dissipation rib in order to increase the heat dissipation area. Therefore, there is a problem that the entire oil-filled transformer is upsized.
　本発明は、上記課題に鑑み、油入変圧器の小型化とタンクの放熱性と強度を考慮した油入変圧器を提供することを目的とする。 An object of the present invention is to provide an oil-filled transformer in which the size of the oil-filled transformer is reduced and the heat dissipation and strength of the tank are taken into consideration.
　本発明は、上記背景技術に鑑み、その一例を挙げるならば、鉄心とコイルとを組み立てた鉄心－コイル組立体をタンク内に収納し、絶縁油を入れてなる油入変圧器であって、タンクは、蓋を取付けるためのフランジと、底板と、フランジと底板との間に配設される側板からなる胴体部とを備え、胴体部の表面には複数のエンボス部が形成されており、胴体部は、エンボス部が形成された側板を筒状に溶接することで構成さており、溶接部はエンボス部に掛かるように溶接されている構成とする。 The present invention, in view of the above background art, is, for example, an oil-impregnated transformer in which an iron core-coil assembly composed of an iron core and a coil is housed in a tank and insulating oil is contained, The tank includes a flange for attaching the lid, a bottom plate, and a body portion comprising side plates disposed between the flange and the bottom plate, and a plurality of embossed portions are formed on the surface of the body portion. The body portion is formed by cylindrically welding a side plate on which the embossed portion is formed, and the welded portion is welded so as to hang on the embossed portion.
　本発明によれば、油入変圧器の小型化とタンクの放熱性と強度を考慮した油入変圧器を提供することができる。 According to the present invention, it is possible to provide an oil-filled transformer which takes into consideration the miniaturization of the oil-filled transformer and the heat dissipation and strength of the tank.
実施例におけるタンク全体の概略斜視図である。It is a schematic perspective view of the whole tank in an example. 実施例における油入変圧器の横断面図である。It is a cross-sectional view of the oil-filled transformer in an Example. 実施例における前提となる放熱リブを設けたタンク全体の斜視図である。It is a perspective view of the whole tank which provided the radiating rib used as the premise in an example. 実施例におけるタンク全体の斜視図である。It is a perspective view of the whole tank in an example. 実施例におけるタンク全体の縦断面を斜めから見た概略斜視図である。It is the schematic perspective view which looked at the longitudinal cross section of the whole tank in an Example diagonally. 実施例における前提となるタンク側板の溶接部分の拡大模式図である。It is an expansion schematic diagram of the welding part of the tank side plate used as the premise in an example. 実施例におけるタンク側板の溶接部分の第1の例を示す拡大模式図である。It is an expansion schematic diagram which shows the 1st example of the welding part of the tank side plate in an Example. 実施例におけるタンク側板の溶接部分の第２の例を示す拡大模式図である。It is an expansion schematic diagram which shows the 2nd example of the welding part of the tank side plate in an Example. 実施例におけるタンク側板の溶接部分の第３の例を示す拡大模式図である。It is an expansion schematic diagram which shows the 3rd example of the welding part of the tank side plate in an Example. 実施例におけるタンク側板の溶接部分の第４の例を示す拡大模式図である。It is an expansion schematic diagram which shows the 4th example of the welding part of the tank side plate in an Example. 実施例におけるタンク側板の溶接部分の第５の例を示す拡大模式図である。It is an expansion schematic diagram which shows the 5th example of the welding part of the tank side plate in an Example.
　以下、本発明の実施例を図面を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１は、本実施例におけるタンク全体の概略斜視図である。図１において、タンク１０は、蓋を取付けるためのフランジ１１、底板１２と、フランジ１１と底板１２との間に配設される側板からなる胴体部１３とを備え、これらにより鉄心とコイルとを組み立てた鉄心－コイル組立体及びこれを絶縁するための絶縁油を収容するように構成されている。胴体部１３は、シート状の簿板、例えば鋼板をプレス加工によって成形したものである。 FIG. 1 is a schematic perspective view of the entire tank in the present embodiment. In FIG. 1, the tank 10 is provided with a flange 11 for attaching a lid, a bottom plate 12, and a body portion 13 consisting of a side plate disposed between the flange 11 and the bottom plate 12, thereby making it possible to use an iron core and a coil. The assembled core-coil assembly and the insulating oil for insulating it are configured to be accommodated. The body portion 13 is a sheet-like base plate, for example, formed by pressing a steel plate.
　また、図２は、本実施例における油入変圧器の横断面を上から見た横断面図である。図２は、Ｕ相、Ｖ相、Ｗ相からなる３相３脚構造の油入変圧器を示している。図２において、直方体形状のタンク１０の内部に各相毎に鉄心－コイル組立体２０を収納し、その周囲に絶縁油３０を満たしている。
鉄心－コイル組立体２０は、鉄心２１の脚部にそれぞれの相のコイル２２が設けられている。コイル２２は一次コイル部２３と二次コイル部２４で構成されている。 Moreover, FIG. 2 is a cross-sectional view which looked the cross-section of the oil-impregnated transformer in a present Example from the top. FIG. 2 shows an oil filled transformer of a three-phase three-leg structure consisting of U-phase, V-phase and W-phase. In FIG. 2, an iron core-coil assembly 20 is accommodated for each phase in a rectangular parallelepiped tank 10, and insulating oil 30 is filled around it.
The iron core-coil assembly 20 is provided with coils 22 of respective phases on the legs of the iron core 21. The coil 22 is composed of a primary coil portion 23 and a secondary coil portion 24.
　図３は、本実施例における前提となる放熱リブを設けたタンク全体の斜視図である。図３に示すように、放熱面積を多くするために、従来のタンク構造に従って、タンク１０の胴体部１３の外側に全周に渡って放熱リブ４０を一定間隔で設ける構成が考えられる。 FIG. 3 is a perspective view of the entire tank provided with a heat dissipating rib as a premise in the present embodiment. As shown in FIG. 3, in order to increase the heat radiation area, it is conceivable to provide the heat radiation ribs 40 at the regular intervals on the entire outer periphery of the body portion 13 of the tank 10 according to the conventional tank structure.
　しかし、前述したように、放熱リブを設けて、さらに放熱効果を上げるために放熱リブを大きくすると、油入変圧器全体が大型化してしまうという課題があった。 However, as described above, when the heat dissipating rib is provided and the heat dissipating rib is further enlarged in order to increase the heat dissipating effect, there is a problem that the entire oil-filled transformer is increased in size.
　そこで、本実施例では、タンク周囲の放熱面積を多くするために、タンクの胴体部１３に複数の凸部、すなわちエンボス部５０を形成する。 Therefore, in the present embodiment, in order to increase the heat radiation area around the tank, a plurality of convex portions, that is, the embossed portions 50 are formed on the body portion 13 of the tank.
　図４は、本実施例におけるタンク全体の斜視図である。図４に示すように、本実施例では、タンク周囲の放熱面積を多くするために、タンクの胴体部１３に複数のエンボス部５０を形成している。各エンボス部５０は、胴体部１３の周囲に所定の間隔をもって並列配列や千鳥配列などで配置される。そして、各エンボス部５０は、例えば半球状に張り出して形成され、連続して配置され、高熱伝達の放熱面を形成している。なお、図４では、エンボス部５０を凸部としているが、凹部としてもよい。 FIG. 4 is a perspective view of the entire tank in the present embodiment. As shown in FIG. 4, in the present embodiment, in order to increase the heat radiation area around the tank, a plurality of embossed portions 50 are formed on the body portion 13 of the tank. The embossed portions 50 are arranged in parallel or in a staggered arrangement around the body 13 at predetermined intervals. Each embossed portion 50 is formed, for example, in a hemispherical shape, and is continuously disposed to form a heat dissipation surface of high heat transfer. In addition, although the embossing part 50 is made into the convex part in FIG. 4, it is good also as a recessed part.
　このように、タンクの胴体部に凸部または凹部のエンボス部を形成することで、油入変圧器全体の大型化を抑えながら、放熱面積を広くでき、放熱性をより向上させることができる。また、凸部または凹部のエンボス部を形成することにより、タンクの強度を向上することができる。 As described above, by forming the embossed portion of the convex portion or the concave portion on the body portion of the tank, it is possible to widen the heat radiation area and to further improve the heat radiation performance while suppressing the upsizing of the entire oil-filled transformer. Moreover, the strength of the tank can be improved by forming the embossed portion of the convex portion or the concave portion.
　ところで、胴体部１３は、シート状の簿板をプレス加工によって成形するが、シート状の側板から筒状の胴体部を構成するために、側板の端部を溶接等により接続する必要がある。図５は、タンク全体の縦断面を斜めから見た概略斜視図を示す。なお、図５においては、エンボス部は省略している。胴体部１３を形成するためには、例えば、図５に示すような、胴体部１３の縦半分ずつを、プレス加工によってエンボス加工し、折り曲げて成形し、成形後の縦半分の、上面から見た場合コ字状となる２つの側板を溶接により接合させて製造する。なお、1枚の板を筒状に成形し溶接してもよい。図５におけるＡ-Ａ線が溶接を行う箇所であり溶接線を示している。 By the way, the body portion 13 is formed by pressing a sheet-like base plate, but in order to form a tubular body portion from the sheet-like side plate, it is necessary to connect the end portions of the side plates by welding or the like. FIG. 5 shows a schematic perspective view of the longitudinal section of the entire tank as viewed obliquely. In FIG. 5, the embossed portion is omitted. In order to form the body portion 13, for example, as shown in FIG. 5, the longitudinal halves of the body portion 13 are embossed by pressing, bent and formed, and the longitudinal half after forming is viewed from the upper surface In this case, two side plates which are U-shaped are joined and manufactured by welding. In addition, you may shape | mold and weld one plate in a cylinder shape. The line AA in FIG. 5 is a portion where welding is performed, and shows a welding line.
　図６は、胴体部１３を構成する側板の溶接部分の拡大模式図である。Ａ-Ａ線は図５における溶接線を示している。図６においては、溶接個所は、エンボス部が施されていない平板部６０どうしで溶接している。 FIG. 6 is an enlarged schematic view of a welded portion of the side plate constituting the body portion 13. Line AA shows the weld line in FIG. In FIG. 6, the welding portion is welded between the flat plate portions 60 which are not provided with the embossed portion.
　これに対し、図７では、平板部６０とエンボス部５０の端部が掛かる部分で溶接している。溶接は溶接線に沿って溶接操作され、溶接中に溶融凝固した金属であるビードがある程度幅を持って溶接部を形成する。したがって、図７の溶接によれば、エンボス部を溶接するため、溶接距離が側板の縦方向の直線距離よりも延びる。このため、図６の平板部６０どうしで溶接する場合よりも強度が向上するという効果がある。 On the other hand, in FIG. 7, welding is performed at a portion where the flat portion 60 and the end portion of the embossed portion 50 hang. Welding is carried out along a weld line, and a bead, which is a molten solidified metal during welding, has a certain width to form a weld. Therefore, according to the welding of FIG. 7, in order to weld an embossed part, the welding distance is extended rather than the linear distance of the longitudinal direction of a side plate. For this reason, there is an effect that strength is improved as compared with the case where the flat portions 60 of FIG.
　また、図８は、平板部６０とエンボス部５０の半分が掛かる部分で溶接している。これによれば、エンボス部のより曲率の高い部分との溶接となるので、図７の場合に比べてさらに溶接距離が延びる。このため、より強度が向上するという特徴がある。また、立体的な溶接が可能となり、より強度向上がはかれる。 Moreover, in FIG. 8, it welds in the part to which the flat part 60 and the half of the embossing part 50 hang. According to this, since welding is performed with the portion of higher curvature of the embossed portion, the welding distance is further extended as compared with the case of FIG. Therefore, there is a feature that the strength is further improved. In addition, three-dimensional welding is possible and strength can be further improved.
　また、図９は、エンボス部５０の端部どうしで溶接している例である。この例でも、平板部６０どうしで溶接する場合よりも溶接距離が延びるため、強度が向上するという特徴がある。 Further, FIG. 9 is an example in which the end portions of the embossed portion 50 are welded to each other. Also in this example, the welding distance is longer than in the case where the flat plate portions 60 are welded together, so that the strength is improved.
　また、図１０は、エンボス部５０の端部とエンボス部５０の半分が掛かる部分で溶接している。この場合も、平板部６０どうしで溶接する場合よりも溶接距離が延びる、さらに立体的な溶接が可能となり、より強度向上がはかれる。 Further, in FIG. 10, the end of the embossed portion 50 and the half of the embossed portion 50 are welded. Also in this case, the welding distance is longer than in the case where the flat portions 60 are welded together, and further three-dimensional welding is possible, and the strength can be further improved.
　また、図１１は、エンボス部５０の半分が掛かる部分どうしで溶接している。この場合も、平板部６０どうしで溶接する場合よりも溶接距離が延びる、さらに立体的な溶接が可能となり、より強度向上がはかれる。 Moreover, in FIG. 11, it welds in the part which the half of the embossing part 50 hangs. Also in this case, the welding distance is longer than in the case where the flat portions 60 are welded together, and further three-dimensional welding is possible, and the strength can be further improved.
　以上の図７から図１１のように、溶接部がエンボス部に掛かるように溶接することで溶接距離が延び、さらに、立体的な溶接が可能となり、強度向上をはかることができる。 As described above in FIGS. 7 to 11, welding is performed so that the welded portion hangs on the embossed portion, so that the welding distance is extended, and three-dimensional welding is possible, and the strength can be improved.
　なお側板どうしの溶接において、側板を突き合せて溶接してもよいし、側板を重ねて側板の端部を溶接するようにしてもよい。 In welding of the side plates, the side plates may be butted and welded, or the side plates may be overlapped to weld the end portions of the side plates.
　また、上記エンボス部は、溶接する際の位置決めの目安として使用できる。また、エンボス部は周期的に配置されているので、接続する側板のエンボス部どうしを重ねて溶接するようにすれば、エンボス部自体が溶接の位置決めとして使用できる。なお、位置決め用に専用のエンボス部を設けてもよい。 Moreover, the said embossing part can be used as a standard of positioning at the time of welding. Further, since the embossed portions are periodically arranged, the embossed portions themselves can be used as welding positions if the embossed portions of the connected side plates are overlapped and welded. In addition, you may provide the embossing part for exclusive use for positioning.
　以上のように、本実施例は、タンクの胴体部を形成する側板に凸部または凹部のエンボス部を形成し、折り曲げて成形し、この側板を筒状に溶接する際に、溶接部がエンボス部に掛かるように溶接する。 As described above, according to the present embodiment, the embossed portion of the convex portion or the concave portion is formed on the side plate forming the body portion of the tank, bent and formed, and the welded portion is embossed when the side plate is welded in a tubular shape. Weld to hang on the part.
　これにより、タンクに放熱リブを設けることなく小型化が図られ、エンボス部による放熱性向上とタンクの強度向上に加え、さらにタンクの強度向上をはかることができる。 As a result, the size can be reduced without providing the heat dissipation rib in the tank, and the strength of the tank can be further improved in addition to the improvement of the heat dissipation property by the embossed portion and the improvement of the strength of the tank.
　１０：タンク、１１：フランジ、１２：底板、１３：胴体部、２０：鉄心－コイル組立体、２１：鉄心、２２：コイル、２３：一次コイル部、２４：二次コイル部、３０：絶縁油、４０：放熱リブ、５０：エンボス部、６０：平板部 10: Tank, 11: Flange, 12: Bottom plate, 13: Fuselage, 20: Iron core-coil assembly, 21: Iron core, 22: Coil, 23: Primary coil, 24: Secondary coil, 30: Insulating oil , 40: heat radiation rib, 50: embossed portion, 60: flat plate portion

Claims (11)

  1. 　鉄心とコイルとを組み立てた鉄心－コイル組立体をタンク内に収納し、絶縁油を入れてなる油入変圧器であって、
    　前記タンクは、蓋を取付けるためのフランジと、底板と、前記フランジと前記底板との間に配設される側板からなる胴体部とを備え、
    前記胴体部の表面には複数のエンボス部が形成されており、
    前記胴体部は、前記エンボス部が形成された側板を筒状に溶接することで構成さており、該溶接部は前記エンボス部に掛かるように溶接されていることを特徴とする油入変圧器。     An oil-impregnated transformer in which an iron core-coil assembly comprising an iron core and a coil is housed in a tank and filled with insulating oil,
    The tank includes a flange for attaching a lid, a bottom plate, and a body portion including a side plate disposed between the flange and the bottom plate.
    A plurality of embossed portions are formed on the surface of the body portion,
    The oil-filled transformer according to claim 1, wherein the body portion is formed by welding side plates on which the embossed portion is formed in a cylindrical shape, and the welded portion is welded so as to hang on the embossed portion.
  2. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板の平板部とエンボス部の端部が掛かるように溶接されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The said oil-filled transformer characterized in that the said welding part is welded so that the flat part of the said side plate and the edge part of an embossing part may hang.
  3. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板の平板部とエンボス部の半分が掛かるように溶接されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The said oil-filled transformer characterized in that the said welding part is welded so that the flat part of the said side plate and the half of an embossing part may hang.
  4. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板のエンボス部の端部どうしが掛かるように溶接されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The said oil-filled transformer characterized in that the said welding part is welded so that the edge parts of the embossing of the said side plate may hang.
  5. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板のエンボス部の端部とエンボス部の半分が掛かるように溶接されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The said oil-filled transformer characterized in that the said welding part is welded so that the edge part and half of an embossing part of the embossing of the said side plate may hang.
  6. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板のエンボス部の半分どうしが掛かるように溶接されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The oil-impregnated transformer according to claim 1, wherein the welded portion is welded such that half of the embossed portions of the side plate hang on each other.
  7. 　請求項１から６の何れか１項に記載の油入変圧器において、
    前記エンボス部は溶接を行なう際の位置決めに用いられることを特徴とする油入変圧器。     The oil-filled transformer according to any one of claims 1 to 6,
    The emboss part is used for positioning at the time of welding.
  8. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板のエンボス部を重ねて溶接されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    An oil filled transformer characterized in that the welded portion is welded by overlapping the embossed portions of the side plates.
  9. 　請求項１記載の油入変圧器において、
    前記溶接部は、前記側板の端面を突き合せるかまたは側板を重ねて側板の端面を溶接することを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The oil-impregnated transformer according to claim 1, wherein the welding portion abuts on the end faces of the side plates or overlaps the side plates and welds the end faces of the side plates.
  10. 　請求項１記載の油入変圧器において、
    前記タンクの胴体部の表面の複数のエンボス部は凸部または凹部であり、並列配列もしくは千鳥配列で連続して配置されていることを特徴とする油入変圧器。     In the oil-filled transformer according to claim 1,
    The plurality of embossed portions on the surface of the body portion of the tank are convex portions or concave portions, and are continuously arranged in a parallel arrangement or a staggered arrangement.
  11. 　油入変圧器のタンクの製造方法であって、
    該タンクは、蓋を取付けるためのフランジと、底板と、前記フランジと前記底板との間に配設される側板からなる胴体部とを備えており、
    前記胴体部の表面には複数のエンボス部が形成されており、
    前記側板にプレス加工により前記エンボス部を形成し、
    該形成された側板を折り曲げて成形し、
    該成形された２枚の側板を溶接部が前記エンボス部に掛かるように溶接することを特徴とする油入変圧器のタンクの製造方法。     A method of producing a tank of oil-filled transformer, comprising
    The tank includes a flange for attaching a lid, a bottom plate, and a body portion including a side plate disposed between the flange and the bottom plate.
    A plurality of embossed portions are formed on the surface of the body portion,
    Forming the embossed portion on the side plate by pressing;
    The formed side plate is bent and formed,
    A method of manufacturing a tank for an oil-filled transformer, comprising welding the two molded side plates so that a welded portion hangs on the embossed portion.
PCT/JP2018/001503 2017-06-21 2018-01-19 Oil-filled transformer and production method for tank used therein WO2018235322A1 (en)

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