JPH0573923U - Sheet winding transformer - Google Patents

Sheet winding transformer

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Publication number
JPH0573923U
JPH0573923U JP1195492U JP1195492U JPH0573923U JP H0573923 U JPH0573923 U JP H0573923U JP 1195492 U JP1195492 U JP 1195492U JP 1195492 U JP1195492 U JP 1195492U JP H0573923 U JPH0573923 U JP H0573923U
Authority
JP
Japan
Prior art keywords
winding
shield ring
shield
sheet
insulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1195492U
Other languages
Japanese (ja)
Other versions
JP2598660Y2 (en
Inventor
利彦 窪田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Original Assignee
Meidensha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meidensha Corp filed Critical Meidensha Corp
Priority to JP1992011954U priority Critical patent/JP2598660Y2/en
Publication of JPH0573923U publication Critical patent/JPH0573923U/en
Application granted granted Critical
Publication of JP2598660Y2 publication Critical patent/JP2598660Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Regulation Of General Use Transformers (AREA)

Abstract

(57)【要約】 【目的】 金属シートと絶縁シートとを重ね合わせて巻
回してなるシート巻線変圧器において、シート巻線端部
に設けた電界緩和用シールドリングを巻線端シールドに
密着させて電界集中を無くし、絶縁の信頼性を確保しつ
つ、部品点数および調整作業の短縮を図ることを目的と
する。 【構成】 シールドリング1Hの切離し部の相対する対
向面11,12にねじ孔13,14を螺設し、このねじ
孔13,14に両ねじ絶縁ボルト2を螺合して該絶縁ボ
ルト2の回動操作によりシールドリング1Hを巻線端シ
ールド16に密着させる。
(57) [Abstract] [Purpose] In a sheet winding transformer formed by stacking and winding a metal sheet and an insulating sheet, the electric field mitigating shield ring provided at the sheet winding end is closely attached to the winding end shield. The purpose of this is to reduce the number of parts and the adjustment work while ensuring the insulation reliability by eliminating the electric field concentration. [Structure] Screw holes 13 and 14 are screwed into opposing surfaces 11 and 12 of the separated portion of the shield ring 1H, which face each other, and both screw insulating bolts 2 are screwed into the screw holes 13 and 14, and the insulating bolt 2 The shield ring 1H is brought into close contact with the winding end shield 16 by the rotating operation.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、金属シートと絶縁シートとを重ね合わせて巻回して成るシート巻線 変圧器に関し、特に、シート巻線の巻線端部の電界緩和を図るためのシールドリ ングの構成の改良に関する。 The present invention relates to a sheet winding transformer formed by superposing and winding a metal sheet and an insulating sheet, and more particularly, to an improvement of a shield ring structure for relaxing an electric field at a winding end portion of the sheet winding.

【0002】[0002]

【従来の技術】[Prior Art]

従来、金属シートと絶縁シートを重ね合わせて巻回してなるシート巻線は、巻 線作業の自動化が可能であり優れた巻線方式であるが、導体が金属箔から成り薄 いため巻線端部に電界集中をたきすので、巻線端部にシールドリングを置き、巻 線端部全体の電界緩和を図っている。 Conventionally, the sheet winding, which is made by stacking a metal sheet and an insulating sheet on top of each other, is an excellent winding method that can automate the winding work.However, since the conductor is made of metal foil and is thin, the winding end Since the electric field is concentrated at the end, a shield ring is placed at the end of the winding to reduce the electric field at the end of the winding.

【0003】 図2は、このシールドリング部分の説明図で(A)はシート巻線部分の要部断 面図、(B)は(A)図の平面図を示している。これらの図において、鉄心21 に低圧(内側)巻線22が巻回され、その外側に低圧、高圧間の主絶縁部25を 介して高圧(外側)巻線23が巻回されている。低圧巻線22の外周と主絶縁部 25の内周および高圧巻線23の内周と主絶縁部25の外周との間には1ターン を形成しないシート状の巻線端シールドが設けられている。2A and 2B are explanatory views of the shield ring portion. FIG. 2A is a sectional view of a main portion of a sheet winding portion, and FIG. 2B is a plan view of FIG. In these figures, a low-voltage (inner) winding 22 is wound around an iron core 21, and a high-voltage (outer) winding 23 is wound around the iron core 21 via a main insulating portion 25 between the low-voltage and the high-voltage. A sheet-shaped winding end shield that does not form one turn is provided between the outer circumference of the low-voltage winding 22 and the inner circumference of the main insulating portion 25, and between the inner circumference of the high-voltage winding 23 and the outer circumference of the main insulating portion 25. There is.

【0004】 図3は、高圧巻線23側の要部断面図で、主絶縁部25の外側と高圧巻線23 との間に破線で示すように1ターンを形成しないシート状の巻線端シールド16 が巻き付けられ、またこの巻線端シールド16の外側には絶縁シート26が巻き 付けられている。そして、その外側にコルゲート状のスペーサ27により形成さ れる冷却ダクト28が配設され、さらにその外側に導体としての金属シート29 と、レヤー間絶縁物としての絶縁シート30が巻回され、前記金属シート29の 軸線方向(図の上下方向)の両側には、金属シート29の厚さと等しくなるよう な厚さの端部絶縁シート31が巻き込まれている。FIG. 3 is a cross-sectional view of a main part of the high-voltage winding 23 side, showing a sheet-like winding end that does not form one turn between the outside of the main insulating portion 25 and the high-voltage winding 23 as shown by a broken line. A shield 16 is wound, and an insulating sheet 26 is wound around the winding end shield 16. A cooling duct 28 formed by a corrugated spacer 27 is disposed on the outer side thereof, and a metal sheet 29 as a conductor and an insulating sheet 30 as an inter-layer insulating material are wound on the outer side of the cooling duct 28. An end insulating sheet 31 having a thickness equal to the thickness of the metal sheet 29 is wound on both sides of the sheet 29 in the axial direction (vertical direction in the drawing).

【0005】 また、図2(A)に示すように低圧巻線22および高圧巻線23の上部には、 電界緩和用のシールドリング1Lおよび1Hが配設されている。これらのシール ドリング1Lおよび1Hと、前記巻線端シールド16とは、それぞれ図示省略し たリード線により接続されて同電位にされている。低圧巻線側のシールドリング 1Lは、図2(B)に示すように絶縁筒32との間に挿入された絶縁ピース33 および楔34によって低圧、高圧間の主絶縁部25に圧接され、また、高圧巻線 側のシールドリング1Hはバインド36により主絶縁部25側に圧接されている 。Further, as shown in FIG. 2A, shield rings 1L and 1H for relaxing an electric field are disposed above the low voltage winding 22 and the high voltage winding 23. The shield rings 1L and 1H and the winding end shield 16 are connected to each other by lead wires (not shown) to be at the same potential. As shown in FIG. 2 (B), the shield ring 1L on the low-voltage winding side is pressed against the main insulating portion 25 between the low voltage and the high voltage by the insulating piece 33 and the wedge 34 which are inserted between the shield ring 1L and the insulating tube 32. The shield ring 1H on the high voltage winding side is pressed against the main insulating portion 25 side by the bind 36.

【0006】 なお、以上は高圧巻線側について説明したが、低圧側巻線においても同様に形 成され、巻線端シールドは、低圧巻線の外周側の主絶縁部25側に設けられてい る。Although the high-voltage winding side has been described above, the low-voltage winding is also formed in the same manner, and the winding end shield is provided on the outer peripheral side of the low-voltage winding on the main insulating portion 25 side. It

【0007】[0007]

【考案が解決しようとする課題】[Problems to be solved by the device]

低圧巻線22と高圧巻線23の上下部にシールドリング1Lおよび1Hを配設 して電界緩和を図っているが、このシールドリングは、巻線端シールド16との 間が離れると図4(B)に示すように巻線端シールド16との間に電界が集中し 、部分放電の発生や絶縁破壊などをおこし、絶縁の信頼性が低下する。この電界 集中はシールドリングと巻線端シールドとのギャップGが図4(A)のようにO の場合は生じないが、図4(B)のようにギャップGが大きくなるにしたがって 電界集中をきたす。なお、図4中1HSはシールドリング絶縁を示している。シ ールドリングを巻線端シールドに全周に亘って密着させることは非常に難しいの で、従来は図2に示すように内側(低圧側)のシールドリングは内側の絶縁筒3 2を基礎に楔34によって外周方向に張力を与え、また外側(高圧側)のシール ドリングの場合は、バインド36によって内周方向に圧縮力を与えて巻線端シー ルドに全周で密着させるようにしている。 The shield rings 1L and 1H are arranged above and below the low-voltage winding 22 and the high-voltage winding 23 in order to relax the electric field. As shown in B), the electric field is concentrated between the winding end shield 16 and the winding end shield 16 to cause partial discharge or dielectric breakdown, thereby lowering the insulation reliability. This electric field concentration does not occur when the gap G between the shield ring and the winding end shield is O 2 as shown in FIG. 4A, but the electric field concentration increases as the gap G becomes larger as shown in FIG. 4B. Come. Note that 1HS in FIG. 4 indicates shield ring insulation. Since it is very difficult to closely attach the shield ring to the winding end shield over the entire circumference, conventionally, the inner (low-voltage side) shield ring is wedged on the inner insulating cylinder 32 as shown in FIG. 34 applies tension in the outer circumferential direction, and in the case of the outer (high pressure side) shield ring, the binding 36 applies compressive force in the inner circumferential direction so as to make close contact with the winding end shield over the entire circumference.

【0008】 このため、楔、絶縁ピース等の部品を多く必要とするとともに、長期間の使用 時に振動等により楔がづれて締付けが緩み、これら部品の脱落、欠損が生ずる恐 れがあるので、これを防止する対策が必要となる。更に楔による張力の調整およ びバインドによる圧縮力の調整作業を必要とし、この作業に時間がかかる等の課 題があった。For this reason, many parts such as wedges and insulating pieces are required, and during long-term use, the wedges are loosened due to vibrations and the tightening is loosened. It is necessary to take measures to prevent this. Furthermore, tension adjustment with a wedge and compression force adjustment with a bind are required, and this task takes time.

【0009】 本考案は以上の点に鑑み、絶縁の信頼性を確保しつつ且つ部品点数が少なく調 整作業時間の少ない此の種のシールドリングを得ることを目的とする。In view of the above points, the present invention has an object to obtain a shield ring of this kind which has a small number of parts and a short adjustment work time while ensuring the reliability of insulation.

【0010】[0010]

【課題を解決するための手段】[Means for Solving the Problems]

本考案において上記の課題を解決するための手段は、金属シートと絶縁シート を重ね合わせて巻回してなるシート巻線の巻線端部に電界緩和のためのシールド リングを備えたシート巻線変圧器において、前記シールドリングの切離し部の相 対する両端面にねじ孔を設けるとともに、この両ねじ孔に、両ねじを有する絶縁 ボルトを螺合して該絶縁ボルトの回動操作によりシールドリングの径を調整して 、該シールドリングをその内径側または外径側に有する巻線端シールドと密着さ せるようにする。 Means for solving the above-mentioned problems in the present invention is a sheet winding transformer provided with a shield ring for relaxing an electric field at a winding end portion of a sheet winding formed by superposing and winding a metal sheet and an insulating sheet. In the container, screw holes are provided on opposite end surfaces of the separated portion of the shield ring, and insulating bolts having both screws are screwed into these screw holes, and the diameter of the shield ring is rotated by rotating the insulating bolt. By adjusting so that the shield ring is brought into close contact with the winding end shield provided on the inner diameter side or the outer diameter side.

【0011】[0011]

【作用】[Action]

本考案は上記のように構成しているので、内側シールドリングにおいては絶縁 ボルトを一方向に回すとシールドリングは外径が広がる方向の張力を受け、また 外側シールドリングにおいては前記と反対側に回すことによって内径方向に圧縮 力として作用し、シールドリングは巻線端シールドに密着する。よってシールド リングと巻線端シールド部の電界は緩和される。 Since the present invention is configured as described above, when the insulating bolt is turned in one direction in the inner shield ring, the shield ring receives tension in the direction in which the outer diameter expands, and in the outer shield ring, it is applied to the opposite side. When turned, it acts as a compressive force in the inner diameter direction, and the shield ring adheres closely to the winding end shield. Therefore, the electric fields of the shield ring and the winding end shield are alleviated.

【0012】[0012]

【実施例】【Example】

以下、本考案を図1および図4に示す一実施例に基づいて説明する。 The present invention will be described below based on an embodiment shown in FIGS.

【0013】 図1(A)は本考案の高圧(外側)巻線の要部断面図、(B)は(A)のA− A断面矢視図を示している。これらの図において図2および図3と同じ名称又は 同じ機能を有する部分には図2および図3と同一符号を付して説明を省略する。FIG. 1A is a sectional view of a main part of a high-voltage (outer) winding of the present invention, and FIG. 1B is a sectional view taken along the line AA of FIG. In these figures, parts having the same names or the same functions as those in FIGS. 2 and 3 are given the same reference numerals as those in FIGS. 2 and 3 and their explanations are omitted.

【0014】 しかして、本考案はシールドリング1Lまたは1Hを巻線端シールド16に密 着させる手段に特徴を有する。以下、高圧(外側)巻線側シールドリング1Hに ついて説明すると、シールドリング1Hは一般に一部が切離されて相対する対向 面11と12を有する。この両対向面11と12に夫々周方向のねじ孔13およ び14を螺設する。2は両端側にねじを有する両ねじ絶縁ボルトで、例えば一方 端側に左ねじ3、他方端側に右ねじ4が螺設してあり、この両ねじ絶縁ボルト2 は前記のねじ孔13および14に螺合される。5はスパナ等で回動操作し得る角 状操作部(4角又は6角状)である。なお、この両ねじ絶縁ボルト2の両端側の ねじは必ずしも左、右ねじとする必要はなく、ねじ孔側の一方を右ねじ孔、他方 を左ねじ孔としてもよい。要は絶縁ボルト2の回動操作によって対向面11と1 2が接離調整できればよい。Thus, the present invention is characterized by a means for tightly attaching the shield ring 1L or 1H to the winding end shield 16. The high-voltage (outer) winding side shield ring 1H will be described below. Generally, the shield ring 1H has opposed surfaces 11 and 12 which are partially separated from each other. Threaded holes 13 and 14 in the circumferential direction are screwed into the facing surfaces 11 and 12, respectively. Reference numeral 2 is a double-screw insulating bolt having screws on both ends, for example, a left screw 3 is screwed on one end side, and a right screw 4 is screwed on the other end side. 14 is screwed together. Reference numeral 5 denotes an angular operation portion (square or hexagonal shape) that can be rotated by a spanner or the like. The screws on both ends of the double-screw insulating bolt 2 do not necessarily have to be left and right screws, and one of the screw hole sides may be a right screw hole and the other may be a left screw hole. The point is that the facing surfaces 11 and 12 can be adjusted in contact and separation by rotating the insulating bolt 2.

【0015】 次に、シールドリング1Hを圧縮して巻線端シールド16に密着させる場合は 、絶縁ボルト2の角状操作部5をスパナ等で一方向に回動することで、シールド リングの両端面側は互いに接近する方向、即ち内径側に圧縮力が働き、シールド リング1Hは巻線端シールド16に密着され、図4(A)のようにギャップ0と なる。Next, when the shield ring 1H is compressed and brought into close contact with the winding end shield 16, the angular operation portion 5 of the insulating bolt 2 is rotated in one direction by a spanner or the like, so that both ends of the shield ring 1 are rotated. A compressive force acts on the surface sides in a direction in which they approach each other, that is, in the inner diameter side, and the shield ring 1H is in close contact with the winding end shield 16 to form a gap 0 as shown in FIG. 4 (A).

【0016】 低圧(内側)巻線側シールドリング1Lの場合は、絶縁ボルト2の角状操作部 を前記と反対方向に回動してシールドリングの対向面を互いに離れる方向、即ち 、外側に広がる方向に作用させ、低圧巻線の外側に配設した巻線端シールド(図 示省略)に圧接させる。In the case of the low-voltage (inner) winding-side shield ring 1L, the angular operating portion of the insulating bolt 2 is rotated in the opposite direction to the direction in which the opposing surfaces of the shield ring are separated from each other, that is, spread outward. Direction, and press-contact the winding end shield (not shown) arranged outside the low-voltage winding.

【0017】[0017]

【考案の効果】[Effect of the device]

本考案は上述のように構成されているので、両ねじ絶縁ボルトの回動操作によ ってシールドリングの径の微調整できるので、低圧,高圧間の主絶縁部15の径 の仕上がり寸法に少々の誤差があっても、この絶縁ボルトで調整ができる。従っ て楔等を必要としない。 Since the present invention is configured as described above, the diameter of the shield ring can be finely adjusted by rotating the double-screw insulating bolt, so that the finished size of the diameter of the main insulating portion 15 between low pressure and high pressure can be adjusted. Even if there is a slight error, it can be adjusted with this insulation bolt. Therefore, no wedges are needed.

【0018】 また、シールドリングの径を調整することによりシート巻線端(巻線端シール ド)との密着が完全に行われ、電界緩和効果が向上して絶縁の信頼性が確保され る。Further, by adjusting the diameter of the shield ring, the close contact with the sheet winding end (winding end shield) is completely performed, the electric field relaxation effect is improved, and the insulation reliability is secured.

【0019】 また、両ねじ絶縁ボルトを使用しているため、シールドリングの径の調整はこ の絶縁ボルトをいずれかの一方向に回すだけで調整ができ、しかもこのボルトは 絶縁部材で形成されているので、シールドリングは1ターンを形成することはな い。Further, since the double-screw insulating bolt is used, the diameter of the shield ring can be adjusted by simply rotating the insulating bolt in one direction, and the bolt is formed of an insulating member. Therefore, the shield ring does not form one turn.

【0020】 更に、楔や絶縁ピースを必要としないので、部品点数が少なく、また調整作業 時間も短時間で済み調整に要する工数が少なくなり、シート巻線変圧器のコスト の低減が図れる等種々の実用的効果を奏する。Furthermore, since no wedges or insulating pieces are required, the number of parts is small, the adjustment work time is short, the number of man-hours required for adjustment is small, and the cost of the sheet winding transformer can be reduced. Has a practical effect.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案の一実施例の説明図。 (A)・要部(高圧巻線部)縦断側面図。 (B),(A)のA−A線における断面矢視図。FIG. 1 is an explanatory view of an embodiment of the present invention. (A) -A vertical sectional side view of a main part (high-voltage winding part). (B) The sectional arrow line view in the AA line of (A).

【図2】従来例のシールドリング部分の説明図。 (A)・要部縦断側面図。 (B),(A)の平面図。FIG. 2 is an explanatory view of a shield ring portion of a conventional example. (A) -A vertical sectional side view of a main part. The top view of (B) and (A).

【図3】従来例の高圧巻線の要部断面図。FIG. 3 is a cross-sectional view of a main part of a conventional high voltage winding.

【図4】シールドリングと巻線端シールド部の電界分布
図。 (A)・ギャップOの状態。 (B)・ギャップGの状態。
FIG. 4 is an electric field distribution diagram of a shield ring and a winding end shield part. (A) ・ Gap O state. (B) -Gap G state.

【符号の説明】[Explanation of symbols]

1L…内側(低圧巻線側)シールドリング 1H…外側(高圧巻線側)シールドリング 2…絶縁ボルト 3,4…左,右ねじ 5…多角操作部 11,12…対向面 13,14…ねじ孔 15,25…主絶縁部 16…巻線端シールド 1L ... Inside (low-voltage winding side) shield ring 1H ... Outside (high-voltage winding side) shield ring 2 ... Insulation bolt 3,4 ... Left and right screw 5 ... Polygonal operation part 11, 12 ... Opposing surface 13,14 ... Screw Holes 15, 25 ... Main insulation 16 ... Winding end shield

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 金属シートと絶縁シートを重ね合わせて
巻回してなるシート巻線の巻線端部に電界緩和のための
シールドリングを備えたシート巻線変圧器において、前
記シールドリングの切離し部の相対する両端面にねじ孔
を設けるとともに、この両ねじ孔に、両ねじを有する絶
縁ボルトを螺合して該絶縁ボルトの回動操作によりシー
ルドリングの径を調整して、該シールドリングをその内
径側または外径側に有する巻線端シールドと密着させる
ようにしたことを特徴とするシート巻線変圧器。
1. A sheet winding transformer having a shield ring for relaxing an electric field at a winding end portion of a sheet winding formed by stacking and winding a metal sheet and an insulating sheet, and separating the shield ring. Screw holes are provided on both end surfaces of the shield ring, and insulating bolts having both screws are screwed into the screw holes, and the diameter of the shield ring is adjusted by rotating the insulating bolt to adjust the shield ring. A sheet winding transformer characterized by being closely attached to a winding end shield provided on the inner diameter side or the outer diameter side.
JP1992011954U 1992-03-11 1992-03-11 Sheet winding transformer Expired - Lifetime JP2598660Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1992011954U JP2598660Y2 (en) 1992-03-11 1992-03-11 Sheet winding transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1992011954U JP2598660Y2 (en) 1992-03-11 1992-03-11 Sheet winding transformer

Publications (2)

Publication Number Publication Date
JPH0573923U true JPH0573923U (en) 1993-10-08
JP2598660Y2 JP2598660Y2 (en) 1999-08-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP1992011954U Expired - Lifetime JP2598660Y2 (en) 1992-03-11 1992-03-11 Sheet winding transformer

Country Status (1)

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JP (1) JP2598660Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558510A (en) * 1978-10-24 1980-05-01 Mitsubishi Electric Corp Transformer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558510A (en) * 1978-10-24 1980-05-01 Mitsubishi Electric Corp Transformer

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JP2598660Y2 (en) 1999-08-16

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