JPS62193233A - Liquid cooling gas insulated induction electric apparatus - Google Patents
Liquid cooling gas insulated induction electric apparatusInfo
- Publication number
- JPS62193233A JPS62193233A JP3565186A JP3565186A JPS62193233A JP S62193233 A JPS62193233 A JP S62193233A JP 3565186 A JP3565186 A JP 3565186A JP 3565186 A JP3565186 A JP 3565186A JP S62193233 A JPS62193233 A JP S62193233A
- Authority
- JP
- Japan
- Prior art keywords
- insulating
- tank
- windings
- insulation
- winding
- 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
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 29
- 230000006698 induction Effects 0.000 title claims description 16
- 239000000112 cooling gas Substances 0.000 title 1
- 238000009413 insulation Methods 0.000 claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 52
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 230000008602 contraction Effects 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 14
- 238000001816 cooling Methods 0.000 abstract description 10
- 239000011810 insulating material Substances 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 230000001629 suppression Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Transformer Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明はタンク内の絶縁ガス空間と冷却液の循環通路と
を区画する絶縁槽に収納された巻線を冷媒液により冷却
する液冷ガス絶縁誘導電器、ことに絶縁槽の構造に関す
る。[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a liquid-cooled gas cooling system that uses a refrigerant liquid to cool windings housed in an insulating tank that partitions an insulating gas space in the tank and a cooling liquid circulation path. Related to insulated induction appliances, especially the structure of insulation tanks.
近年、従来の絶縁油に代ってSF、ガスなどの難燃性の
絶縁ガスとフロロカーボン、70ンなどの難燃性、絶縁
性の冷媒液とを併用することにより難燃化さねた誘導電
器が注目されており、最近では、この種の誘導電器を高
電圧化、大容量化することが求められている。ところが
、冷媒液は絶縁油に比べて格段に高価であり、かつ多量
の絶縁ガスを溶解して耐電圧強度が低下する性質を有す
るので、巻線および冷媒液を絶縁槽に収納して巻線を冷
媒液により顕熱冷却するとともに、絶縁ガス空間と冷媒
液とを絶縁槽により気密に区分することにより、冷媒液
の使用tf低減し、かつ冷媒液と絶縁ガスの混合を阻止
して巻線近傍の高電界部を耐電圧強度の高い冷媒液で絶
縁したいわゆる液冷ガス絶縁誘導電器が知られている。In recent years, in place of conventional insulating oil, flame-retardant insulating gases such as SF and gas have been used in combination with flame-retardant and insulating refrigerant liquids such as fluorocarbon and 70N. Electrical appliances are attracting attention, and recently there has been a demand for higher voltage and larger capacity of this type of induction electric appliance. However, refrigerant liquid is much more expensive than insulating oil, and has the property of dissolving a large amount of insulating gas and reducing the withstand voltage strength. By cooling the refrigerant by sensible heat with the refrigerant liquid, and by airtightly separating the insulating gas space and the refrigerant liquid by an insulating tank, the usage tf of the refrigerant liquid is reduced, and mixing of the refrigerant liquid and the insulating gas is prevented. A so-called liquid-cooled gas-insulated induction electric appliance is known in which a nearby high electric field portion is insulated with a refrigerant liquid having high withstand voltage strength.
第4図は液冷ガス絶縁誘導電器の従来構造を示す概略側
断面図である。図において、1は鉄心2および巻線3A
、3Bを主構成要素とする誘導を器本体であシ、SF、
ガス等の絶縁ガス11を包蔵したタンク10に収納され
るとともに、端部絶縁4A、4Bを含む巻線3A、3B
は、内周側絶縁筒6A、外周側絶縁筒(5B 、 i+
’C,板7.盈板8を相互に気密に組合わせてなり中央
部に鉄心2の脚部が貫通する中空部5Aを有する円環筒
状の絶縁槽5に収納さね1、絶縁材よりなる受台4Cを
介して鉄心2に結合された下部フレーム2Bに載置され
るとともに、巻線上端部絶縁4A側に配された金属製の
押圧リング21.蓋板8を気密に貫通して上部フレーム
2Aに連結された締付ボルト22によ)巻線3A、3B
それぞれの軸方向に所定の締付荷重が加えられることに
より、上下一対のフレーム2A、2B間に抑圧支持され
るよう構成されている。また、絶縁ガス空間11と気密
に区画された絶縁槽5の内部にはフロロカーボン、フロ
ンなどの冷媒液14が充填され、底板7および蓋板8を
介して一方端が絶縁槽5に連通し、他方端が外部冷却器
13に連通した循環通路12A、12Bを介して巻線3
A 、3B内を強制循環する冷媒液14の急熱により巻
線が冷却されるよう構成されている。したがって、絶縁
Wi5によって冷媒液14と絶縁ガス11とが区分され
、高価な冷媒液14の使用1辻を発熱量の多い巻線部分
に限定できるとともに、冷媒液14中への絶縁ガス11
の溶解ならびに急熱冷却による冷媒液の発泡が阻止され
ることにより冷媒液14の耐屯圧強度を高度に保持でき
るので、高電圧化されたaH4電器を経済的に有利に製
作することができる。FIG. 4 is a schematic side sectional view showing the conventional structure of a liquid-cooled gas-insulated induction appliance. In the figure, 1 is the iron core 2 and the winding 3A
, 3B is the main component, and the main component is the guide, SF,
Windings 3A and 3B are housed in a tank 10 containing an insulating gas 11 such as gas, and include end insulation 4A and 4B.
The inner insulating cylinder 6A, the outer insulating cylinder (5B, i+
'C, board 7. A ring 1 and a pedestal 4C made of an insulating material are housed in an annular cylindrical insulating tank 5 which has a hollow part 5A in the center which has a hollow part 5A through which the legs of the iron core 2 pass through. A metal pressing ring 21. is placed on the lower frame 2B coupled to the iron core 2 through the metal pressing ring 21. The windings 3A, 3B are connected to the upper frame 2A by a tightening bolt 22 that passes through the cover plate 8 in an airtight manner and is connected to the upper frame 2A.
By applying a predetermined tightening load in each axial direction, it is configured to be compressed and supported between a pair of upper and lower frames 2A and 2B. The inside of the insulation tank 5, which is airtightly divided from the insulation gas space 11, is filled with a refrigerant liquid 14 such as fluorocarbon or fluorocarbon, and one end communicates with the insulation tank 5 via the bottom plate 7 and the lid plate 8. The winding 3 is connected to the winding 3 through circulation passages 12A and 12B whose other ends communicate with the external cooler 13.
The windings are cooled by the rapid heating of the refrigerant liquid 14 that is forcedly circulated within A and 3B. Therefore, the refrigerant liquid 14 and the insulating gas 11 are separated by the insulation Wi5, and the use of the expensive refrigerant liquid 14 can be limited to the winding portion that generates a large amount of heat.
By preventing the melting of the refrigerant and the foaming of the refrigerant liquid due to rapid cooling, the pressure resistance strength of the refrigerant liquid 14 can be maintained at a high level, so that high-voltage aH4 electric appliances can be manufactured economically. .
ところで、前述のように構成された液冷ガス絶縁誘導電
器において、巻線3A、3Bは一般に、絶縁被覆導体を
径方向に巻き重ねてなる平板リング状の複数のセクショ
ンコイル相互間にセクション間冷却ダクトを保持するス
ペーサを介在させて積層配置した円板巻線が用いられ、
導体の絶縁被覆、スペーサならびに巻線端部絶縁4 A
、 4”B等には冷媒液14の浸透性に優れた絶縁紙
、プレスポード等の繊維質絶縁材が用いられるが、繊維
質絶縁材が常温常湿の雰囲気中でその重量の数%に及ぶ
水分を含んでいるために、組立作業を終了した誘導電器
本体1は真空加熱乾燥炉に収納さ力、乾燥処理が行われ
る。ところが、前記繊維質絶縁材は乾燥処理によってそ
の厚み方向に数%収縮する性質をもち、かつ軸方向締付
荷重による寸法収縮が加わるために、端部絶縁4A 、
4Bを含めた巻線3A、3Bの軸方向高さは乾燥および
締付工程において100mm前後も収縮することが多い
。By the way, in the liquid-cooled gas-insulated induction electric appliance configured as described above, the windings 3A and 3B are generally formed by inter-section cooling between a plurality of flat ring-shaped section coils formed by winding insulated conductors in the radial direction. Disc windings are used that are stacked and arranged with a spacer intervening to hold the duct.
Conductor insulation coating, spacer and winding end insulation 4 A
, 4"B etc. are made of fibrous insulating materials such as insulating paper and presspod, which have excellent permeability to the refrigerant liquid 14. Because it contains moisture, the induction electric appliance main body 1 that has been assembled is stored in a vacuum heating drying oven and subjected to a drying process.However, the fibrous insulating material loses several percent of its thickness in the drying process. Because it has the property of shrinking and undergoes dimensional shrinkage due to axial tightening load, the end insulation 4A,
The axial height of the windings 3A and 3B including wire 4B often shrinks by about 100 mm during the drying and tightening process.
したがって、絶縁槽5を気密性および機檄的強度の優れ
た繊維強化プラスチックス(FRP)を用いて形成した
場合、乾燥による収縮性の無いFRPからなる絶縁槽5
内で巻線、5A、3Bのみが100mも収縮することに
なり、%線の軸方向寸法の収縮に伴な9て絶縁槽5の内
部に無駄な空間が発生するとともに、大地電位となる金
属製の抑圧リング21が絶縁槽5内に配されているため
に、絶縁槽5の軸方向寸法を抑圧リング21の厚み分だ
け更に大きくする必要がある。その結果、絶縁415の
上部には巻線の絶縁や冷却に寄与しない遊休空間15が
存在し、絶縁槽5の軸方向寸法が増大するとともに、高
価な冷媒液14の1史用量が増加して経済的不利益をま
ねく欠点がある。さらに、巻線の収縮は締付ポルト22
の長大化をまねき、巻線の軸方向締付力を不安定にする
とともに、蓋板8の貫通部における液漏れが増すなどの
不都合につながる欠点がある。Therefore, when the insulation tank 5 is formed using fiber-reinforced plastics (FRP) with excellent airtightness and mechanical strength, the insulation tank 5 made of FRP does not shrink when dried.
In this case, only the windings 5A and 3B will shrink by 100 m, and as the axial dimension of the wires shrinks, a wasted space will be created inside the insulation tank 5, and the metal that will be at ground potential will be Since the suppression ring 21 made of aluminum is disposed within the insulation tank 5, it is necessary to further increase the axial dimension of the insulation tank 5 by the thickness of the suppression ring 21. As a result, there is an idle space 15 above the insulation 415 that does not contribute to insulation or cooling of the windings, which increases the axial dimension of the insulation tank 5 and increases the amount of expensive refrigerant liquid 14. There are drawbacks that cause economic disadvantage. Furthermore, the contraction of the winding is caused by the tightening port 22.
This leads to an increase in the length of the winding, which makes the axial tightening force of the winding unstable, and also leads to disadvantages such as an increase in liquid leakage at the penetrating portion of the cover plate 8.
本発明は前述の状況に鑑みてなされたもので。 The present invention has been made in view of the above-mentioned situation.
巻線の乾燥収縮等に追随して絶縁槽を軸方向に縮小する
ことができ、したがって冷媒液の使用量が少く経済的な
液冷ガス絶縁誘導電器を提供することを目的とする。It is an object of the present invention to provide an economical liquid-cooled gas-insulated induction electric appliance in which an insulation tank can be reduced in the axial direction in accordance with drying shrinkage of windings, etc., and the amount of refrigerant liquid used is small.
本発明は、端部絶縁を含む巻線を収納するよう円環筒状
に形成された絶縁槽の内周側絶縁筒および外周側絶縁筒
からなる側壁部分に巻か−の収縮に追随して軸方向に収
縮可能な伸縮部を設け、絶縁槽の外側から巻線に軸方向
の締付荷fI’に加え、巻#i!を絶縁槽とともに鉄心
に固定された上下一対のフレーム間に抑圧支持するよう
構成したことにより、絶縁槽の容積の無駄が排除され、
したがって高価な冷媒液の使用量を巻線の冷却および絶
縁に必要な量に低減できるようにしたものである。The present invention follows the shrinkage of the windings on the side wall portion consisting of the inner insulating cylinder and the outer insulating cylinder of an insulating tank formed in an annular cylindrical shape to accommodate the winding including end insulation. An extensible part that can be contracted in the axial direction is provided, and an axial tightening load fI' is applied to the winding from the outside of the insulation tank, and winding #i! By configuring the insulating tank to be compressed and supported between a pair of upper and lower frames fixed to the iron core, wasted volume of the insulating tank is eliminated.
Therefore, the amount of expensive refrigerant liquid used can be reduced to the amount necessary for cooling and insulating the windings.
以下本発明を実施例に基づいて説明する。 The present invention will be explained below based on examples.
第1図は本発明の実施例を示す誘導電器本体部分の概略
側断面図であり、従来技術と同じ部分には10」−参照
符号を付して詳細な説明は省略する。FIG. 1 is a schematic side sectional view of a main body portion of an induction electric device showing an embodiment of the present invention, and the same parts as in the prior art are given reference numerals 10'' and detailed explanation thereof is omitted.
図において、軸方向両端部に端部絶縁4A 、 4Bを
有する巻線3A、3Bを収納した絶縁槽65は、板
平板リング状の絶縁材からなる底部57にそれぞれ端部
が気密に結合された内周側絶縁筒36Aおよび外周側絶
縁筒36Bとからなり、鉄心2の脚部を包囲するよう円
環筒状に形成された容器部と、内外絶縁筒36A、36
Bそれぞれに気密に7ランジ結合された伸縮絶縁継手3
9A、69Bと、伸縮絶縁継手39A、39Bに気密に
7ランジ結合された蓋板68とで構成されておシ、絶縁
槽ろ5は受台4C’を介して下部7レーム2Bに支承さ
れるとともに、蓋板38上に配された締付リング21、
締付ボルト22により締付荷重が加えられることにより
、鉄心に固定された一対のフレーム2A、2B間に抑圧
支持されるよう構成されており、底板37および蓋板3
8に端部が気密に結合された循環通路12A、12Bを
介して絶縁槽65と外部冷却器15との間全強制循環す
る冷媒液14により、巻線3A、3Bが冷却されるとと
もに、巻線近傍の高電界部の耐電圧が保持されるよう構
成されている。In the figure, an insulating tank 65 housing windings 3A and 3B having end insulation 4A and 4B at both axial ends is airtightly connected at each end to a bottom part 57 made of a flat ring-shaped insulating material. A container part formed in an annular cylinder shape so as to surround the leg part of the iron core 2, and an inner and outer insulating cylinder 36A, 36B.
Expansion insulation joints 3 hermetically connected with 7 langes to each B
9A, 69B, and a cover plate 68 airtightly connected to the expansion and contraction insulating joints 39A, 39B with seven flange. together with the tightening ring 21 arranged on the cover plate 38,
By applying a tightening load with the tightening bolts 22, the frame is compressed and supported between the pair of frames 2A and 2B fixed to the iron core, and the bottom plate 37 and the cover plate 3
The windings 3A and 3B are cooled by the refrigerant liquid 14 that is forcedly circulated between the insulation tank 65 and the external cooler 15 through the circulation passages 12A and 12B whose ends are hermetically connected to the windings 3A and 3B. The structure is such that the withstand voltage of the high electric field area near the line is maintained.
第2図は前述の実施例における絶縁槽の要部の一部破砕
側断面図であり、耐冷媒液性を有するゴム、可とう性を
有する合成樹脂等の成形加工品からなる伸縮絶縁継手3
9A、59B側の絶縁7ランジ例えば42A、42Bと
絶縁筒側の絶縁7ランジ41A、41Eとをバッキング
44を介在させて絶縁ボルト45を用いて気密に連結し
、7ランジ43A、43Bを平板リング状の蓋板38と
ノ間ニハッキング44を介在させて絶縁ボルト45を用
いて気密に連結することにより、巻線を気密に包囲する
絶縁槽65を形成することができる。FIG. 2 is a partially fragmented side sectional view of the main part of the insulation tank in the above-mentioned embodiment, and shows an expansion insulation joint 3 made of a molded product of rubber having refrigerant resistance, flexible synthetic resin, etc.
The insulating 7 langes 42A, 42B on the 9A, 59B side, for example, and the insulating 7 langes 41A, 41E on the insulating cylinder side are airtightly connected using insulating bolts 45 with the backing 44 interposed, and the 7 langes 43A, 43B are connected to a flat plate ring. By airtightly connecting the shaped cover plate 38 and the gap 44 using insulating bolts 45, an insulating tank 65 that airtightly surrounds the winding can be formed.
なお伸縮絶縁継手39A 、39Bの軸方向の伸縮量は
巻線3A、3B等の乾燥および締付収縮量分考慮して決
められることはいうまでもないことである。It goes without saying that the amount of expansion and contraction in the axial direction of the expansion and contraction insulating joints 39A and 39B is determined by taking into consideration the amount of drying and tightening shrinkage of the windings 3A and 3B.
前述のように構成された液冷ガス絶縁誘導電器において
は、未乾燥状態あるいは仮乾燥状態の端部絶縁4A、4
Bを含む巻線3A、3Bを収容した絶縁槽65は、伸縮
絶縁継手39A、39Bを幾分伸ばした状態で蓋板38
を連結することにより閉鎖することができ、締付ボルト
22および剛性を有する締付リング21を介して絶縁槽
35に軸方向締付荷重を加えることにより、巻線3A。In the liquid-cooled gas-insulated induction electric appliance configured as described above, the end insulation 4A, 4 is in an undried state or a temporarily dried state.
The insulation tank 65 that accommodates the windings 3A and 3B including B is attached to the cover plate 38 with the expansion insulation joints 39A and 39B slightly stretched.
The winding 3A can be closed by connecting the winding 3A by applying an axial tightening load to the insulation tank 35 via the tightening bolt 22 and the rigid tightening ring 21.
3Bおよび端部絶R4A、4Bの軸方向の収縮に追随し
て伸縮絶縁継手39A、39Bが収縮し、蓋板68.底
板67、受台4Cを介して巻線3A、5Bを一対のフレ
ーム2A 、2B間に押圧支持できるとともに、絶縁槽
35が受台4Cの厚みによって決まる位置に固定された
誘導電器本体1を組立てることができる。そこで変圧器
本体1を真空加熱乾燥炉に搬入し、例えば循環連路12
A。3B and the end portions R4A, 4B contract in the axial direction, the expansion insulating joints 39A, 39B contract, and the cover plate 68. Assemble the induction electric appliance main body 1 in which the windings 3A and 5B can be pressed and supported between the pair of frames 2A and 2B via the bottom plate 67 and the pedestal 4C, and the insulating tank 35 is fixed at a position determined by the thickness of the pedestal 4C. be able to. Therefore, the transformer main body 1 is carried into a vacuum heating drying oven, and, for example, the circulation passage 12 is
A.
12Bを除湿孔として乾燥処理を行ない、繊維質絶縁材
の乾燥収縮に基づく締付荷重の低下を締付ボルト22を
増し締めすることによって補う。このとき、端部絶縁4
A、4Bを含む巻線3A、3Bの乾燥収縮に追随して伸
縮絶縁継手591.59Bが収縮し、絶縁槽65の深さ
を巻線6A、3Bの冷却性能と絶縁性能を維持するため
に必要な最適寸法とすることができ、かつ絶縁槽の外側
から巻線3A、6BK軸方向の締付荷重を加えることが
可能となることによって大地電位となる押圧リング21
を蓋板38の外側に配することが可能となシ、絶縁槽6
5の容積を従来技術に比べて一層縮小することができる
。12B is used as a dehumidification hole to perform a drying process, and the reduction in the tightening load due to drying shrinkage of the fibrous insulating material is compensated for by further tightening the tightening bolt 22. At this time, the end insulation 4
The expansion insulation joint 591.59B shrinks following the drying shrinkage of the windings 3A and 3B including A and 4B, and the depth of the insulation tank 65 is adjusted to maintain the cooling performance and insulation performance of the windings 6A and 3B. The pressing ring 21 can be made to the required optimum size and can be brought to earth potential by applying a tightening load in the axial direction of the windings 3A and 6BK from the outside of the insulation tank.
It is possible to arrange the insulation tank 6 on the outside of the cover plate 38.
5 can be further reduced compared to the prior art.
第6図は本発明の異なる実施例を示す要部の概略側断面
図であ)、蓋板48を内外周絶縁筒46A、46B間に
挿入可能な厚手の平板リング状に形成してバッキング4
7を設けることにょシシール部を兼ねた軸方向伸縮部4
9に一形成するとともに、金MMの抑圧リング21.締
付ボルト22を廃し、蓋板48を抑圧リングに兼用して
上部フレーム2Aと蓋板48との間に介挿された間隔片
54により軸方向の締付荷重を保持させるよう構成した
点が前述の実施例と異なっておシ、誘導電器本体の組立
、乾燥工程において蓋板48とフレーム2人との間にジ
ヤツキ等を仮設して絶縁槽5゜の外側から巻線3A、3
Bに軸方向の締付荷重を加え、乾燥終了時点で締付荷重
を幾分高めた状態で所定の厚みにあらかじめ調整された
間隔片54を蓋板48の周方向に分布して複数個挿入し
、ジヤツキ金取除くことにより、巻線5A 、3Bに所
定の締付荷重が加わった状態で絶縁槽5oを上下一対の
フレーム2A 、2B間に押圧支持させることができ、
かつ繊維質絶縁材の収縮に追随して蓋板48が軸方向に
自在に移動することにょシ、絶縁槽内に遊休空間が発生
するのを阻止できる。また、絶縁材からなる蓋板全巻線
3A、3Bの端部絶縁4A 、4Bの一部に兼用できる
ことにより、端部絶縁4A 、4Bの厚みを低減でき、
かつ間隔片54にも電圧を負担させられるので、蓋板4
8を厚く形成したにも拘らず絶縁槽5oの軸方向寸法を
短縮できる利点が得られる。FIG. 6 is a schematic side sectional view of the main part showing a different embodiment of the present invention), in which the cover plate 48 is formed into a thick flat ring shape that can be inserted between the inner and outer peripheral insulating cylinders 46A and 46B, and the backing 4
7 is provided to provide an axially expandable part 4 which also serves as a seal part.
9 and a gold MM suppression ring 21. The tightening bolt 22 is eliminated, the cover plate 48 is also used as a suppression ring, and the spacer piece 54 inserted between the upper frame 2A and the cover plate 48 is configured to hold the tightening load in the axial direction. Unlike the previous embodiment, during the assembly and drying process of the induction electric device, a jack or the like is temporarily installed between the cover plate 48 and the two frames, and the windings 3A, 3 are inserted from the outside of the insulation tank 5°.
A tightening load in the axial direction is applied to B, and at the end of drying, a plurality of spacing pieces 54 whose thickness has been adjusted in advance are inserted in a circumferential direction of the cover plate 48 with the tightening load being increased somewhat. However, by removing the jacks, the insulation tank 5o can be pressed and supported between the upper and lower pairs of frames 2A and 2B with a predetermined tightening load applied to the windings 5A and 3B.
In addition, since the cover plate 48 freely moves in the axial direction following the shrinkage of the fibrous insulating material, it is possible to prevent idle spaces from being generated within the insulating tank. In addition, since the cover plate made of insulating material can also be used as part of the end insulation 4A, 4B of the entire winding 3A, 3B, the thickness of the end insulation 4A, 4B can be reduced.
In addition, since the voltage can also be applied to the spacer piece 54, the cover plate 4
Although the insulating tank 8 is formed thick, the axial dimension of the insulating tank 5o can be shortened.
本発明は前述のように、液冷巻線を収納する絶縁槽の内
周側および外周側絶縁筒それぞれの上端部と蓋板との間
に伸縮部を設けて軸方向に伸縮可能な絶縁槽を形成する
とともに、蓋板の上方に配された抑圧部材により絶縁槽
の外側から巻線に軸方向荷重を加えるよう構成した。そ
の結果、端部絶縁を含む巻線の俄維質絶縁材の乾燥収縮
ならびに軸方向荷重による収縮に追随して絶縁槽を収縮
させることができ、かつ大地電位となる抑圧リングを絶
縁槽の外部に移すことが可能となったことにより、従来
技術で問題となった巻線の収縮代ならびに押圧リングの
収納スペースからなる巻線の冷却、絶縁に寄与しない絶
縁槽の遊休スペースが排除され、絶縁槽が小形化される
ことにより、高価な冷媒液の使用量が少くしたがって安
価な液冷ガス絶縁誘導電器を提供することができる。ま
た締付ボルトが短縮または排除され、かつ蓋板側の締付
ボルトの貫通孔が排除されることにより、液漏れなどの
危険性が少く、冷媒液への絶縁ガスの溶解を阻止できる
とともに、安定した軸方向荷重を維持して巻線を絶縁槽
とともに一対のフレーム間に強固に抑圧支持できるので
、誘導電器の高電圧化、大容量化に貢献することができ
る。As described above, the present invention provides an insulating tank that can expand and contract in the axial direction by providing an expandable part between the upper end of each of the inner and outer insulating tubes of the insulating tank that accommodates the liquid cooling winding and the cover plate. The structure is such that an axial load is applied to the windings from the outside of the insulation tank by means of a suppressing member placed above the lid plate. As a result, the insulation tank can be contracted by following the drying shrinkage of the fibrous insulation material of the winding including the end insulation and the contraction due to axial load, and the suppression ring, which is at ground potential, can be placed outside the insulation tank. This eliminates the shrinkage allowance for the winding, which was a problem with the conventional technology, and the idle space in the insulation tank that does not contribute to winding cooling and insulation, which is the storage space for the press ring. By making the tank smaller, the amount of expensive refrigerant liquid used is reduced, and therefore an inexpensive liquid-cooled gas-insulated induction electric appliance can be provided. In addition, by shortening or eliminating the tightening bolts and eliminating the through holes for the tightening bolts on the cover plate side, there is less risk of liquid leakage, and it is possible to prevent the insulating gas from dissolving in the refrigerant liquid. Since a stable axial load can be maintained and the winding can be firmly suppressed and supported together with the insulation tank between the pair of frames, it can contribute to higher voltage and larger capacity of induction electric appliances.
第1図は本発明の実施例を示す要部の概略側断面図、第
2図は実施例における絶縁槽部分の一部破砕側断面図、
第3図は異なる実施例を示す要部の側断面図、第4図は
従来技術を示す側断面図である。
1・・・誘41r1.器本体、2川鉄心、2A、2B・
・・フレーム、3A、3B・・・巻線、4A 、4B・
・・端部絶縁、4C・・・受台、5,35.50−・・
絶R檜、6A、36A、46A・・・内周側絶縁筒、6
B 、56B、46B・・・外周側絶縁筒、7,37・
・・底板、8゜38.48・・・蓋板、10・・・タン
ク、11・・・絶縁ガス、12A、12B・・・循環通
路、13・・・冷却器、14・・・冷媒液、15・・・
遊休空間、21・・・押圧リング、22・・・締付ボル
ト、39A、39B・・・伸縮絶縁継手、47・・・バ
ッキング、49・・・伸縮部、54・・・間隔片。
く−第1図
36B
第2図FIG. 1 is a schematic side sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a partially fragmented side sectional view of an insulation tank portion in the embodiment,
FIG. 3 is a side sectional view of a main part showing a different embodiment, and FIG. 4 is a side sectional view showing a conventional technique. 1... 41r1. The main body of the vessel, 2 river iron cores, 2A, 2B.
... Frame, 3A, 3B... Winding, 4A, 4B.
...End insulation, 4C...Case, 5,35.50-...
Zetsu R Hinoki, 6A, 36A, 46A... Inner peripheral side insulation tube, 6
B, 56B, 46B... Outer peripheral side insulating tube, 7, 37.
...Bottom plate, 8゜38.48...Lid plate, 10...Tank, 11...Insulating gas, 12A, 12B...Circulation passage, 13...Cooler, 14...Refrigerant liquid , 15...
Idle space, 21... Pressing ring, 22... Tightening bolt, 39A, 39B... Expansion insulation joint, 47... Backing, 49... Expandable portion, 54... Spacing piece.
Figure 1 36B Figure 2
Claims (1)
の筒状の巻線部分が、中央部に鉄心脚部が貫通する中空
部を有する円環筒状の絶縁槽に収納されて鉄心脚部に装
着され、かつ鉄心に固定された上下一対のフレーム間に
所定の締付荷重により押圧支持されるとともに、前記絶
縁槽に連通した外部冷却器を介して循環する冷媒液によ
り冷却されるものであって、前記絶縁槽が前記巻線の軸
方向の収縮に追随して収縮可能な伸縮部を備えたことを
特徴とする液冷ガス絶縁誘導電器。1) The cylindrical winding part of the induction electric appliance, which is housed in a tank containing insulating gas, is housed in an annular cylindrical insulating tank that has a hollow part in the center through which the core leg passes. It is attached to the steel core and is pressed and supported by a predetermined tightening load between a pair of upper and lower frames fixed to the iron core, and is cooled by a refrigerant liquid that circulates through an external cooler that communicates with the insulation tank. A liquid-cooled gas-insulated induction electric appliance, characterized in that the insulating tank includes an expandable portion that can contract following contraction of the winding in the axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3565186A JPS62193233A (en) | 1986-02-20 | 1986-02-20 | Liquid cooling gas insulated induction electric apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3565186A JPS62193233A (en) | 1986-02-20 | 1986-02-20 | Liquid cooling gas insulated induction electric apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62193233A true JPS62193233A (en) | 1987-08-25 |
JPH057852B2 JPH057852B2 (en) | 1993-01-29 |
Family
ID=12447778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3565186A Granted JPS62193233A (en) | 1986-02-20 | 1986-02-20 | Liquid cooling gas insulated induction electric apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62193233A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5588510A (en) * | 1978-12-27 | 1980-07-04 | Mitsubishi Electric Corp | Gas insulated electric devide |
JPS5939890A (en) * | 1982-08-26 | 1984-03-05 | Neos Co Ltd | Phenyl-substituted 2-(1-alkenyl)-4-isopropyl-5,5-dimethyl-1, 3-dioxane derivative |
-
1986
- 1986-02-20 JP JP3565186A patent/JPS62193233A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5588510A (en) * | 1978-12-27 | 1980-07-04 | Mitsubishi Electric Corp | Gas insulated electric devide |
JPS5939890A (en) * | 1982-08-26 | 1984-03-05 | Neos Co Ltd | Phenyl-substituted 2-(1-alkenyl)-4-isopropyl-5,5-dimethyl-1, 3-dioxane derivative |
Also Published As
Publication number | Publication date |
---|---|
JPH057852B2 (en) | 1993-01-29 |
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