JP3587033B2 - How to fix the iron core main landing gear - Google Patents

How to fix the iron core main landing gear Download PDF

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Publication number
JP3587033B2
JP3587033B2 JP30401597A JP30401597A JP3587033B2 JP 3587033 B2 JP3587033 B2 JP 3587033B2 JP 30401597 A JP30401597 A JP 30401597A JP 30401597 A JP30401597 A JP 30401597A JP 3587033 B2 JP3587033 B2 JP 3587033B2
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Japan
Prior art keywords
main leg
iron core
fixing
winding
main
Prior art date
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JP30401597A
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Japanese (ja)
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JPH11144989A (en
Inventor
浅田　　規
弘志 小林
政芳 伊藤
隆司 高萩
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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Description

【０００１】
【発明の属する技術分野】
この発明は、変圧器用の鉄心主脚の固定方法に関し、特に、製作工数が大幅に低減される方法に関する。
【０００２】
【従来の技術】
図４は、従来の方法で固定された鉄心主脚の構成を示す側面図である。３相変圧器鉄心の３本の主脚１の下部が、図示されていない下部ヨークを介して磁気的に結合されるとともにフレーム２で挟持されている。主脚１の長さ方向の所々がガラステープ３で締め付けられている。
【０００３】
図５の（Ａ）は図４のＣ−Ｃ断面図、図５の（Ｂ）は図５の（Ａ）の間隔片４の構成を示す要部斜視図である。図５の（Ａ）に示されるように、主脚１が幅の異なる鋼板で積層され、その断面が階段状にほぼ丸く形成されている。主脚１の外周が階段状に凹凸になっている個所には、周囲が丸くなるように絶縁性の間隔片４が添えられている。この間隔片４は、図５の（Ｂ）に示されるように長さ方向の所々に切欠き部４Ａが形成されている。この切欠き部４Ａにガラステープ３の巻かれた層が嵌まり込むようになっている。
【０００４】
図６は、図５の（Ａ）の要部斜視図である。ガラステープ３が切欠き部４Ａの内部を介して巻回され、切欠き部４Ａの開口部すれすれの所まで巻かれる。それによって、ガラステープ３の層が間隔片４から外径側へ突出しないようになっている。
図４に戻り、鋼板で積層された主脚１がガラステープ３で固定されたので、この状態でフレーム２とともに主脚１を垂直に起こすことができる。また、ガラステープ３による固定は、鉄心の振動を抑え騒音の発生も防止している。
【０００５】
図７は、巻線が主脚に嵌挿されるときの図４の主脚１周りの構成を示す断面図であり、図４のＣ−Ｃ断面の位置に相当する。図５の（Ａ）の構成の外周が、さらに絶縁筒５で覆われ、この絶縁筒５の外周に複数の絶縁スペ−サ６が互いに間隔を明けて配されている。
図８は、図４の主脚１に巻線が嵌挿される途中の状態を示す側面図である。主脚１が垂直に立てられ、巻線７が主脚１の上部からＤ方向へ下ろされ、図７の絶縁スペ−サ６の外周に沿って巻線７が嵌挿されている。
【０００６】
なお、図８の他の相の主脚１にも前述と全く同じ方法で巻線７が嵌挿される。巻線７が３相とも主脚１に嵌挿された後は、主脚１の上端に図示されていない上部ヨークが接合され、さらに、図示されていない上のフレームで鉄心が挟持される。
【０００７】
【発明が解決しようとする課題】
しかしながら、前述したような従来の鉄心主脚の固定方法は、製作工数が大幅に発生するという問題があった。
すなわち、主脚の外周を丸くするために、主脚の凹凸に合わせて種々の断面形状の間隔片を製作するとともに、それぞれの間隔片にはガラステープを嵌合させるための切欠き部を加工する必要があった。そのために、間隔片の製作に多大な工数が発生していた。また、主脚にガラステープを何周も巻回する必要があり、この巻回工数も多く発生していた。
【０００８】
この発明の目的は、製作工数が大幅に低減する鉄心主脚の固定方法を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、この発明の方法によれば、鉄心主脚の側面が幅の異なる鋼板で積層されることによって階段状にほぼ丸く形成され、前記主脚の外周が間隔片を介して絶縁筒で覆われ、この絶縁筒の外周が締付けバンドでもって主脚の長さ方向の複数個所で締め付けられた状態で主脚が下部ヨークとともに垂直に起こされ、巻線が主脚の上方から下げられるときに、巻線直近の締付けバンドを順次外しながら巻線が主脚に嵌挿されるようにするとよい。間隔片への切り欠き加工がなくなるとともに、締付けバンドで一時的に主脚を締めるだけなので、ガラステープを何周も巻回する必要がなくなる。それによって、鉄心主脚の固定のための工数が大幅に低減する。
【００１０】
また、かかる方法において、前記絶縁筒が半円状に分割された一対の半割り筒よりなり、この半割り筒の円周端部が互いに重ね合わされるとともに接着材で固定されるようにしてもよい。それによって、一対の半割り筒同士の接着によって主脚の外周が簡単に丸く形成されるようになる。しかも、半割り筒なので締付けバンドの締め付けによって内径側へ締まるようになる。
【００１１】
また、かかる方法において、前記間隔片として丸棒が用いられるようにするとよい。それによって、主脚の凹凸に合わせて市販の丸棒を適宜選び、その主脚の高さに合わせて長さ方向を切断するだけでよい。
【００１２】
【発明の実施の形態】
以下、この発明を実施例に基づいて説明する。図１は、この発明の実施例にかかる方法で固定された鉄心主脚の構成を示す側面図である。３相変圧器鉄心の３本の主脚１の下部が、図示されていない下部ヨークを介して磁気的に結合されるとともにフレーム２で挟持されている。主脚１の長さ方向の所々が締付けバンド９で締め付けられている。
【００１３】
図２は、図１のＡ−Ａ断面図である。主脚１が幅の異なる鋼板で積層され、その断面が階段状にほぼ丸く形成されている。主脚１の外周が階段状に凹凸になっている個所には、周囲が丸くなるように絶縁性の間隔片１１，１２が添えられている。さらに、間隔片１１，１２の外周が、半円状に分割された一対の半割り筒８Ａ，８Ｂで覆われ、半割り筒８Ａ，８Ｂの円周端部が接着材を介して互いに重ね合わされ（接着面１３）、主脚１の外周が丸くなるように形成されている。半割り筒８Ａと８Ｂとで形成された絶縁筒８の外周に複数の絶縁スペ−サ６が互いに間隔を明けて配されている。この絶縁スペ−サ６の外周が締付けバンド９で締め付けられ、バックル１０で留められている。
【００１４】
図１に戻り、鋼板で積層された主脚１が締付けバンド９で固定されたので、この状態でフレーム２とともに主脚１を垂直に起こすことができる。主脚１を起こした後は、図１の状態で巻線を主脚１に挿入することができる。
図３は、図１の主脚１に巻線が嵌挿される途中の状態を示す側面図である。主脚１が垂直に立てられ、巻線７が主脚１の上部からＢ方向へ下ろされ、図２の絶縁スペ−サ６の外周に沿って巻線７が嵌挿される。巻線７の下端が、締付けバンド９の所へ来たときに、その真近の締付けバンド９Ａ（点線）を順次外しながら巻線７が主脚１に嵌挿される。なお、他の相の主脚１にも図３と全く同じ方法で巻線７が嵌挿される。巻線７が３相とも主脚１に嵌挿された後は、主脚１の上端に図示されていない上部ヨークが接合され、さらに、図示されていない上のフレームで鉄心が挟持される。
【００１５】
図２において、間隔片１１，１２には、従来必要であった切欠き部の加工がいらなくなったので、間隔片の製作工数が大幅に低減された。また、間隔片１１を丸棒としたので、主脚１の凹凸に合わせて市販の丸棒を適宜選び、その主脚１の高さに合わせて長さ方向を切断するだけでよくなった。そのために、従来必要であった間隔片の幅方向の加工もなくなり、間隔片の製作工数がさらに低減された。
【００１６】
また、図２において、絶縁筒８が一対の半割り筒８Ａ，８Ｂ同士の接着によって主脚１の外周が簡単に丸く形成されるようになった。半割り筒８Ａ，８Ｂ間の接着材が固まるまで絶縁スペーサ６の外周から締付けバンド９で締め付けられるので、主脚１が確実に固定され鉄心の振動も抑えられ騒音の発生も防止される。また、締付けバンド９はバックル１０で一回締めればよいので、従来のガラステープと異なり多数回の巻回作業が不要であり、主脚１の固定のための工数がさらに低減される。また、締付けバンド９は何回も再利用することができるので、ガラステープの場合より、材料コストも節約できる。
【００１７】
【発明の効果】
この発明の方法は、主脚の外周が間隔片を介して絶縁筒で覆われ、この絶縁筒の外周が締付けバンドでもって主脚の長さ方向の複数個所で締め付けられた状態で主脚が下部ヨークとともに垂直に起こされ、巻線が主脚の上方から下げられるときに、巻線直近の締付けバンドを順次外しながら巻線が主脚に嵌挿される。それによって、間隔片への切り欠き加工がなくなるとともに、締付けバンドで一時的に主脚を締めるだけなので、鉄心主脚の固定のための工数が大幅に低減し、製品のコストダウンが可能になる。
【００１８】
また、かかる方法において、前記絶縁筒が半円状に分割された一対の半割り筒よりなり、この半割り筒の円周端部が互いに重ね合わされるとともに接着材で固定される。それによって、一対の半割り筒同士の接着によって主脚の外周が簡単に丸く形成されるようになる。しかも、半割り筒が締付けバンドの締め付けによって内径側へ締まり、主脚を確実に固定することができる。
【００１９】
また、かかる方法において、前記間隔片として丸棒を用ることによって、間隔片の製作工数も大幅に低減し、製品のさらなるコストダウンが可能になる。
【図面の簡単な説明】
【図１】この発明の実施例にかかる方向で固定された鉄心主脚の構成を示す側面図
【図２】図１のＡ−Ａ断面図
【図３】図１の主脚に巻線が嵌挿される途中の状態を示す側面図
【図４】従来の方法で固定された鉄心主脚の構成を示す側面図
【図５】（Ａ）は図４のＣ−Ｃ断面図、（Ｂ）は図５の（Ａ）の間隔片の構成を示す要部斜視図
【図６】図５の（Ａ）の要部斜視図
【図７】巻線が主脚に嵌挿されるときの図４の主脚周りの構成を示す断面図
【図８】図４の主脚に巻線が嵌挿される途中の状態を示す側面図
【符号の説明】
１：主脚、２：フレーム、３：ガラステープ、４，１１，１２：間隔片、５，８：絶縁筒、６：絶縁スペーサ、７：巻線、８Ａ，８Ｂ：半割り筒、９：締付けバンド、１０：バックル[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for fixing an iron core main leg for a transformer, and more particularly, to a method for significantly reducing the number of manufacturing steps.
[0002]
[Prior art]
FIG. 4 is a side view showing a configuration of an iron core main leg fixed by a conventional method. The lower portions of the three main legs 1 of the three-phase transformer core are magnetically coupled via a lower yoke (not shown) and are sandwiched by a frame 2. Some parts in the length direction of the main leg 1 are fastened with a glass tape 3.
[0003]
5A is a cross-sectional view taken along line CC of FIG. 4, and FIG. 5B is a perspective view of a main part showing the configuration of the spacing piece 4 of FIG. 5A. As shown in FIG. 5A, the main leg 1 is laminated with steel plates having different widths, and the cross section thereof is formed in a substantially round shape in a step shape. Where the outer periphery of the main leg 1 is uneven in a stepwise manner, an insulating spacing piece 4 is provided so as to make the periphery round. As shown in FIG. 5B, the spacing piece 4 has cutouts 4A formed at various locations in the length direction. The wound layer of the glass tape 3 fits into the notch 4A.
[0004]
FIG. 6 is a perspective view of a main part of FIG. The glass tape 3 is wound through the inside of the notch 4A, and is wound up to a point near the opening of the notch 4A. Thereby, the layer of the glass tape 3 does not protrude from the spacing piece 4 to the outer diameter side.
Returning to FIG. 4, since the main leg 1 laminated with the steel plate is fixed by the glass tape 3, the main leg 1 can be raised vertically together with the frame 2 in this state. Further, the fixing with the glass tape 3 suppresses the vibration of the iron core and also prevents the generation of noise.
[0005]
FIG. 7 is a cross-sectional view showing the configuration around the main leg 1 in FIG. 4 when the winding is inserted into the main leg, and corresponds to the position of the CC section in FIG. The outer periphery of the configuration shown in FIG. 5A is further covered with an insulating cylinder 5, and a plurality of insulating spacers 6 are arranged on the outer periphery of the insulating cylinder 5 at intervals.
FIG. 8 is a side view showing a state where the winding is being inserted into main leg 1 of FIG. The main leg 1 is erected vertically, the winding 7 is lowered from the upper part of the main leg 1 in the direction D, and the winding 7 is inserted along the outer periphery of the insulating spacer 6 in FIG.
[0006]
The winding 7 is inserted into the main leg 1 of the other phase in FIG. 8 in exactly the same manner as described above. After the windings 7 are inserted into the main leg 1 in all three phases, an upper yoke (not shown) is joined to the upper end of the main leg 1, and an iron core is held by an upper frame (not shown).
[0007]
[Problems to be solved by the invention]
However, the conventional iron core main leg fixing method as described above has a problem in that the number of manufacturing steps is greatly increased.
That is, in order to make the outer circumference of the main leg round, the interval pieces having various cross-sectional shapes are manufactured according to the unevenness of the main leg, and the notch portion for fitting the glass tape is formed in each interval piece. I needed to. For this reason, a large number of man-hours have been required to manufacture the spacing piece. In addition, it is necessary to wind the glass tape around the main leg many times, and the winding man-hour has been increased.
[0008]
An object of the present invention is to provide a method of fixing an iron core main leg in which the number of manufacturing steps is significantly reduced.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the method of the present invention, the side surfaces of the iron core main legs are formed in a step-like and substantially round shape by being laminated with steel plates having different widths, and the outer periphery of the main legs is provided with a spacing piece therebetween. The main leg is raised vertically with the lower yoke while the outer circumference of the insulating tube is tightened at a plurality of locations in the length direction of the main leg with a tightening band, and the winding is wound above the main leg. It is preferable that the winding is inserted into the main leg while sequentially removing the tightening band immediately adjacent to the winding when it is lowered. Since the notch is not formed on the spacing piece and the main leg is only temporarily tightened with the tightening band, it is not necessary to wind the glass tape many times. Thereby, the man-hour for fixing the iron core main leg is greatly reduced.
[0010]
Further, in such a method, the insulating cylinder may be constituted by a pair of half cylinders divided in a semicircular shape, and circumferential ends of the half cylinders may be overlapped with each other and fixed by an adhesive. Good. Thus, the outer circumference of the main leg is easily formed in a round shape by bonding the pair of half-split cylinders. In addition, since it is a half-split cylinder, it is tightened to the inner diameter side by tightening the tightening band.
[0011]
In such a method, a round bar may be used as the spacing piece. Thus, a commercially available round bar may be appropriately selected according to the unevenness of the main leg, and the length direction may be simply cut in accordance with the height of the main leg.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on examples. FIG. 1 is a side view showing a configuration of an iron core main leg fixed by a method according to an embodiment of the present invention. The lower portions of the three main legs 1 of the three-phase transformer core are magnetically coupled via a lower yoke (not shown) and are sandwiched by a frame 2. The longitudinal direction of the main leg 1 is fastened by a fastening band 9.
[0013]
FIG. 2 is a sectional view taken along line AA of FIG. The main leg 1 is laminated with steel plates having different widths, and its cross section is formed in a substantially round shape in a stepped manner. Where the outer periphery of the main leg 1 is uneven in a stepwise manner, insulating spacing pieces 11 and 12 are provided so as to make the periphery round. Further, the outer peripheries of the spacing pieces 11 and 12 are covered with a pair of half-cylinders 8A and 8B divided in a semicircular shape, and the circumferential ends of the half-cylinders 8A and 8B are overlapped with each other via an adhesive. (Adhesive surface 13), the outer periphery of the main leg 1 is formed to be round. A plurality of insulating spacers 6 are arranged on the outer periphery of the insulating cylinder 8 formed by the half cylinders 8A and 8B with a space therebetween. The outer periphery of the insulating spacer 6 is fastened by a fastening band 9 and fastened by a buckle 10.
[0014]
Returning to FIG. 1, since the main leg 1 laminated with a steel plate is fixed by the fastening band 9, the main leg 1 can be raised vertically together with the frame 2 in this state. After raising the main leg 1, the winding can be inserted into the main leg 1 in the state of FIG.
FIG. 3 is a side view showing a state where the winding is being inserted into main leg 1 of FIG. The main leg 1 is set up vertically, the winding 7 is lowered from the upper part of the main leg 1 in the direction B, and the winding 7 is inserted along the outer periphery of the insulating spacer 6 in FIG. When the lower end of the winding 7 comes to the tightening band 9, the winding 7 is inserted into the main leg 1 while sequentially removing the closest tightening band 9 </ b> A (dotted line). The windings 7 are inserted into the main legs 1 of the other phases in exactly the same manner as in FIG. After the windings 7 are inserted into the main leg 1 in all three phases, an upper yoke (not shown) is joined to the upper end of the main leg 1, and an iron core is held by an upper frame (not shown).
[0015]
In FIG. 2, the gap pieces 11 and 12 do not require the processing of the notch, which was conventionally required, so that the number of man-hours for manufacturing the gap pieces is greatly reduced. Further, since the spacing piece 11 was a round bar, a commercially available round bar was appropriately selected in accordance with the unevenness of the main leg 1, and the length direction was simply cut in accordance with the height of the main leg 1. For this reason, the processing in the width direction of the spacing piece, which was conventionally required, is also eliminated, and the man-hour for manufacturing the spacing piece is further reduced.
[0016]
Further, in FIG. 2, the outer periphery of the main leg 1 is easily formed into a round shape by bonding the pair of half-cylinders 8A and 8B to each other. The main spacer 1 is securely fixed from the outer periphery of the insulating spacer 6 with the tightening band 9 until the adhesive material between the half-cylinders 8A and 8B is hardened, so that the main leg 1 is securely fixed, the vibration of the iron core is suppressed, and the generation of noise is also prevented. Further, since the tightening band 9 may be tightened once with the buckle 10, a large number of winding operations are unnecessary unlike a conventional glass tape, and the number of steps for fixing the main leg 1 is further reduced. Further, since the tightening band 9 can be reused many times, the material cost can be reduced as compared with the case of using the glass tape.
[0017]
【The invention's effect】
According to the method of the present invention, the main leg is covered in a state where the outer periphery of the main leg is covered with an insulating tube via a spacing piece, and the outer periphery of the insulating tube is tightened at a plurality of locations in the length direction of the main leg with a tightening band. When the winding is raised vertically with the lower yoke and the winding is lowered from above the main leg, the winding is inserted into the main leg while sequentially removing the tightening bands immediately adjacent to the winding. As a result, notch processing on the spacing piece is eliminated, and the main leg is only temporarily tightened with the tightening band, so the man-hour for fixing the iron core main leg is significantly reduced, and the cost of the product can be reduced. .
[0018]
In this method, the insulating cylinder is composed of a pair of half cylinders divided in a semicircular shape, and the circumferential ends of the half cylinders are overlapped with each other and fixed with an adhesive. Thus, the outer circumference of the main leg is easily formed in a round shape by bonding the pair of half-split cylinders. In addition, the half cylinder is tightened to the inner diameter side by the tightening of the tightening band, so that the main leg can be securely fixed.
[0019]
In addition, in this method, by using a round bar as the spacing piece, the number of manufacturing steps of the spacing piece is greatly reduced, and the cost of the product can be further reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a core main leg fixed in a direction according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along a line AA in FIG. 1. FIG. FIG. 4 is a side view showing the state of the iron core main leg fixed by a conventional method. FIG. 5A is a cross-sectional view taken along the line CC of FIG. 4, and FIG. FIG. 6 is a perspective view of a main part showing a configuration of a spacing piece of FIG. 5A. FIG. 6 is a perspective view of a main part of FIG. 5A. FIG. FIG. 8 is a cross-sectional view showing the configuration around the main leg. FIG. 8 is a side view showing a state where the winding is being inserted into the main leg in FIG.
1: Main leg, 2: Frame, 3: Glass tape, 4, 11, 12: Spacing piece, 5, 8: Insulating cylinder, 6: Insulating spacer, 7: Winding, 8A, 8B: Half cylinder, 9: Tightening band, 10: buckle

Claims (3)

鉄心主脚の側面が幅の異なる鋼板で積層されることによって階段状にほぼ丸く形成され、前記主脚の外周が間隔片を介して絶縁筒で覆われ、この絶縁筒の外周が締付けバンドでもって主脚の長さ方向の複数個所で締め付けられた状態で主脚が下部ヨークとともに垂直に起こされ、巻線が主脚の上方から下げられるときに、巻線直近の締付けバンドを順次外しながら巻線が主脚に嵌挿されることを特徴とする鉄心主脚の固定方法。The side surfaces of the iron core main legs are laminated with steel plates having different widths, so that the main legs are formed in a substantially round shape in a step-like manner, and the outer periphery of the main legs is covered with an insulating tube via a spacing piece. The main leg is vertically raised together with the lower yoke in a state where the main leg is tightened at a plurality of locations in the length direction of the main leg, and when the winding is lowered from above the main leg, the tightening band immediately adjacent to the winding is sequentially removed. A method of fixing an iron core main leg, wherein the winding is inserted into the main leg. 請求項１に記載の鉄心主脚の固定方法において、前記絶縁筒が半円状に分割された一対の半割り筒よりなり、この半割り筒の円周端部が互いに重ね合わされるとともに接着材で固定されることを特徴とする鉄心主脚の固定方法。2. The method of fixing an iron core main leg according to claim 1, wherein the insulating cylinder comprises a pair of half cylinders divided in a semicircular shape, and circumferential ends of the half cylinders are overlapped with each other and an adhesive material is provided. A method of fixing an iron core main leg, characterized in that the fixing is carried out by using a fixing method. 請求項１または２に記載の鉄心主脚の固定方法において、前記間隔片として丸棒が用いられることを特徴とする鉄心主脚の固定方法。3. The method for fixing a core main leg according to claim 1, wherein a round bar is used as the spacing piece.
JP30401597A 1997-11-06 1997-11-06 How to fix the iron core main landing gear Expired - Lifetime JP3587033B2 (en)

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