CN105097234B - Preparation method for anti-short-circuit amorphous-alloy oil-immersed transformer - Google Patents
Preparation method for anti-short-circuit amorphous-alloy oil-immersed transformer Download PDFInfo
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Abstract
The invention relates to a preparation method for an anti-short-circuit amorphous-alloy oil-immersed transformer which comprises coils and iron cores. Each coil sequentially comprises a framework, an inner-layer winding, a main empty path and an outer-layer winding from inside to outside, the framework adopts an insulating support with a certain thickness, the insulating support is formed by flattening a grid cloth evenly coated with gel-state epoxy resin or winding DMD coated with epoxy resin adhesives on a mould, and gaps of the inner-layer winding and gaps between the inner-layer winding and the insulating support are filled with epoxy resin. According to the method, the inner-layer windings are closely connected with the frames in an adhering mode, therefore, the higher mechanical strength and anti-short-circuit capacity are achieved, and the service life of the transformer is improved; insulating tapes are adopted to bind the inner-layer windings and the outer-layer windings into a whole, when short-circuit force occurs, the inner short-circuit force and the outer short-circuit force can cancel each other out, therefore, the overall anti-short-circuit capacity of the inner-layer windings and the outer-layer windings is improved, the production cost is lowered, and the production efficiency is improved.
Description
Technical field
The present invention relates to distribution transformer technical field, a kind of system of resistance to shorting amorphous alloy oil immersion type transformer is referred specifically to
Preparation Method.
Background technology
Amorphous alloy transformer enjoys electric power because of the more common silicon steel sheet iron-core transformer low 60~80% of its open circuit loss
The welcome of department client, state's net large scale application amorphous alloy transformer since 2010, at present, amorphous alloy variable pressure
Device has realized popularization comprehensively substantially in distribution transformer.However, due to reasons in structure, the resistance to shorting of amorphous alloy transformer
Ability can not still meet power grid user requirement, the sturdy power grid requirement that particularly Guo Wang companies propose, amorphous alloy transformer
Gradually protruded in the defect of resistance to shorting aspect of performance.
At present, the common amorphous alloy transformer structure of in the market is drum type brake winding construction, with drum type brake winding knot
The short-circuit force of the transformer of structure be internal layer winding on show width to power inwardly and axially power to winding in the middle of, on outer layer winding
Width is shown as to power outwards and axial force is to winding two ends, but it is general in winding it is exoskeletal, winding is without axially suppressing and width
To holding, cause that its anti-short circuit capability is poor, low-voltage coil is deformed inward during transformer short-circuit, high-tension coil axial deformation, enters
And cause transformer to burn.
In order to improve amorphous alloy transformer anti-short circuit capability, general producer is thick using 6~10mm during winding in preparing
Skeleton, coat glass fiber tape on outer winding, and to the treatment of winding dipping lacquer, inside and outside winding is compressed to come finally by folder
The anti-short circuit capability of transformer is improved, but such preparation method is relatively costly, make inconvenience.
In addition, Chinese invention patent application of the application publication number for CN103680862A《A kind of amorphous transformer rectangular lines
Around winding and its manufacture method》(application number：CN201310674485.8 a kind of method) is disclosed, although its outer winding is employed
Axial tightening, but junction does not have gluing, is easily collapsed out when short-circuit, and oil duct is not avoided, easily influence transformer is scattered
Hot merit energy；Due to, without bonding, depending merely on a few place's axial tightening effects limited between its wire；Meanwhile, without the anti-of the interior winding of solution
Short circuit problem.It is the Chinese utility model patent of CN202454411U for another Authorization Notice No.《Transformer coil frame structure》
(application number：CN201120542427.6), although there is provided the skeleton of interior winding, but because skeleton is prefabricated to carry out solidification
, interior winding is wound on and because winding is typically all short side one direction press curing, can not cause side side long with its adhesion above
To winding be loose, winding is yielding when by short-circuit force, so as to reduce the service life of transformer.
Therefore, for the structure and preparation method thereof of current resistance to shorting amorphous alloy oil immersion type transformer, await doing into
The improvement of one step.
The content of the invention
The technical problems to be solved by the invention are directed to the present situation of prior art, there is provided a kind of resistance to shorting non-crystaline amorphous metal oil
The preparation method of immersion transformer, the method process is simple, preparation cost are low and preparation efficiency is high, and the transformer machinery of preparation is strong
Degree is high, anti-short circuit capability is good and long service life.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：
A kind of preparation method of resistance to shorting amorphous alloy oil immersion type transformer, it is characterised in that comprise the following steps：
(1) epoxy resin of gel state is coated uniformly on grid cloth and is flattened and obtain soft with epoxy resin
Property grid cloth or epoxy resin is precoated on DMD, the DMD of the flexible mesh cloth or precoating epoxy resin is wrapped into number on mould
Layer forms the insulating support of specific thickness；
(2) in the periphery coiling internal layer winding of above-mentioned insulating support, specially：One layer of conductor layer No.1 of coiling, Ran Hou
One layer of first insulating paper layer of conductor layer No.1 outer cladding；As wire be not foil need to be in conductor layer No.1, the first insulating paper layer
Between coat gel state the first epoxy resin layer.Repeat the above steps until internal layer winding reaches setting specification；Respectively from interior
Layer four vertical direction in face of winding inwardly extrude internal layer winding, the four sides of internal layer winding is bonded as one with insulating support respectively
Body, after extruding is finished, epoxy is filled in the gap in the internal layer winding gap of itself and between internal layer winding and insulating support
Resin, then moves into heating epoxy resin cure in drying room；
(3) in the periphery coiling main empty path of above-mentioned internal layer winding, specially：The point gummed paper of first coiling specified quantity, then
Coiling height than the described crimped paper of the highly big 50~120mm of gummed paper, finally further around the point gummed paper of specified quantity processed；
(4) in the periphery coiling outer layer winding of above-mentioned main empty path, specially：One layer of second conductor layer of coiling, then
The second epoxy resin layer of layer of gel shape is coated outside two conductor layers, then one layer is coated successively in the second epoxy resin layer periphery
Insulating paper and one layer of point gummed paper, then place epoxy resin bar end-blocking at the two ends of the second conductor layer, repeat the above steps until
Outer layer winding reaches setting specification；Outer layer winding is extruded to given size from short side direction, is then moved into drying room and is added
Heat takes off mould to gelatinous epoxy resin cure after the completion of solidification；
(5) C-shaped spacer is placed respectively in the both sides on coil side long, then insert in corresponding coil amorphous core, so
Coil and iron core are mounted between upper clamping piece and lower clamping piece afterwards.
As improvement, described in step (4) after the completion of outer layer winding technique, mould is taken off, with insulating tape along short transverse
The side long of coiling winds one layer, is then charged into mould, then extruded.Using the structure, in advance by outer layer winding and internal layer
Winding is tied to an entirety, can improve the mechanical strength of transformer.
Improve again, before step (5) is carried out, first wind at least one of which, the drawing along the short side of short transverse coiling with drawstring
The two ends of band are long for coil bottom, after the completion of step (5), the two ends of drawstring fastened in the retainer ring of lower clamping piece.So
Installation method without using cross-over block, and need not assembling when to the further compression of coil, simplify structure and preparation
Processing step, reduces cost, improves efficiency.
Compared with prior art, the advantage of the invention is that：
In transformer of the invention, internal layer winding and insulating support can it is Nian Jie under extruding force be an entirety, after extruding
Often there is certain gap between each layer of internal layer winding and between internal layer winding and insulating support, the present invention is in the seam
Epoxy resin is filled with gap, makes Nian Jie tight between internal layer winding and insulating support, transformer is possessed machinery higher
Intensity and anti-short circuit capability, so as to improve the service life of transformer；
Transformer of the invention in the preparation, is first wound with internal layer winding on insulating support, and internal layer winding technique is complete
Bi Hou, first carries out four sides compression, then the gap in the internal layer winding gap of itself and between internal layer winding and insulating support
Interior gel filled shape epoxy resin simultaneously solidifies, the step for internal layer winding and skeleton is formed as a firm entirety, significantly
Improve the anti-short circuit capability of internal layer winding；
During coiling outer layer winding, per the layer conductor of coiling one, the epoxy resin of layer of gel shape is coated all on wire, this coagulates
Outer layer winding is constituted a firm entirety after gluey epoxy resin cure, with mechanical strength higher, and outer layer around
Group coiling is compressed after finishing from short side direction, so as to substantially increase the anti-short circuit capability of outer layer winding；
Meanwhile, outer layer winding and internal layer winding are tied to an entirety by the present invention using alkali-free glass fibre band, so
Inside and outside short-circuit force can cancel out each other when short-circuit force comes, the anti-short circuit capability overall so as to considerably increase inside and outside winding；
Preparation method of the invention is simple, easy to assembly, and production cost is reduced to a certain extent, improves production effect
Rate.
Brief description of the drawings
Fig. 1 is the front view of the embodiment of the present invention；
Fig. 2 is the top view of the embodiment of the present invention；
Fig. 3 is the structural representation of embodiment of the present invention coil；
Fig. 4 is the section structure schematic diagram of first module layer in the embodiment of the present invention；
Fig. 5 is the section structure schematic diagram of second unit layer in the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Fig. 1~5, the resistance to shorting amorphous alloy oil immersion type transformer of the present embodiment includes coil 1, unshakable in one's determination 2, upper folder
Part 3, lower clamping piece 4 and the retainer ring on lower clamping piece 45.Iron core 2 and the phase inserting of coil 1, the coil 1 of the present embodiment is by interior
Outer to include skeleton 11, internal layer winding 13, main empty path 14 and outer layer winding 15 successively, skeleton 11 is with certain thickness insulation branch
Frame, after the insulating support is flattened by the DMD for being uniformly coated with the grid cloth of the epoxy resin of gel state or precoating epoxy resin
It is wound on mould, the 2~6mm of insulating support thickness in the present embodiment.Gap between internal layer winding 13 and insulating support
It is interior filled with epoxy resin.
In the present embodiment, internal layer winding 13 includes multiple first modules layers 130 being layered on top of each other, as shown in figure 4, this
One elementary layer 130 includes conductor layer No.1 131, the first insulating paper layer 133 arranged from inside to outside；If wire is not the need of foil
In conductor layer No.1 appearance coating gel state the first epoxy resin layer 132, outer layer winding 15 include it is multiple be layered on top of each other the
Two elementary layers 150, as shown in figure 5, second unit layer 150 includes the second conductor layer 151, the second epoxy arranged from inside to outside
Resin bed 152, the second insulating paper layer 153 and dispensing ply of paper 154, and the second conductor layer 151 two ends respectively by epoxy resin bar
155 end-blockings.The outer surface of outer layer winding 15 is also wrapped on alkali-free glass fibre band or is coated with the grid of gel epoxy resin
Cloth.The insulating paper layer 153 of above-mentioned first insulating paper layer 133 and second is DMD epoxy preimpregnation materials.
As shown in figure 3, have on the side long of coil 1 along short transverse coiling can be by internal layer winding 13 and outer layer winding 15
The the first alkali-free glass fibre band 16 being fastenedly connected, after internal layer winding 13, main empty path 14 and the equal coiling of outer layer winding 15 are finished,
Internal layer winding 13, main empty path 14 and outer layer winding 15 are tied to an entirety by first alkali-free glass fibre band 16, work as short circuit
Inside and outside short-circuit force can cancel out each other when power is come, the anti-short circuit capability overall so as to considerably increase inside and outside winding.
As shown in Figure 1, 2, coil 1 and unshakable in one's determination 2 has edge located between upper clamping piece 3 and lower clamping piece 4 on the short side of coil 1
The drawstring 6 of short transverse coiling, the lower end of the drawstring 6 is connected with retainer ring 5.The material of drawstring 6 can be alkali-free glass fibre
Band, naturally it is also possible to be the insulating materials of other high intensity, coil 1 is fixed on lower clamping piece 4 using drawstring 6, without as existing
Have it is the same in technology place cushion block between coil 1 and lower clamping piece 4, make the preparation process of transformer simpler；And existing skill
Placed in art after cushion block can still occur between coil 1 and lower clamping piece 4 it is certain rock, and drawstring 6 and lower clamping piece 4 in the present embodiment
Fixed using tension-type, after the completion of assembling, the fixation between folder from top to bottom of coil 1, with preferable mechanical strength.
The preparation method of resistance to shorting amorphous alloy oil immersion type transformer is comprised the following steps in the present embodiment：
(1) epoxy resin of gel state is coated uniformly on grid cloth and is flattened and obtain soft with epoxy resin
Property grid cloth, or epoxy resin is precoated on DMD, the DMD of above-mentioned flexible mesh cloth or precoating epoxy resin is twined on mould
Wrapped winding number layer forms the thick insulating supports of 2~6mm；
(2) in the periphery coiling internal layer winding 13 of above-mentioned insulating support, specially：One layer of conductor layer No.1 131 of coiling, so
One layer of first insulating paper layer 133 is coated in the periphery of conductor layer No.1 131 afterwards, if wire is not foil, first in the first wire
First epoxy resin layer 132 of the outer coating layer of gel shapes of layer 131, then coat one layer of first insulating paper layer 133, then this
One epoxy resin layer 132 repeats the above steps until internal layer winding 13 reaches setting specification；Respectively from 13 4 faces of internal layer winding
Vertical direction inwardly extrude internal layer winding 13, the four sides of internal layer winding 13 is integrated with the bonding of insulating support 11 respectively, squeeze
After pressure is finished, asphalt mixtures modified by epoxy resin is filled in the gap in the gap of itself of internal layer winding 13 and between internal layer winding and insulating support
Fat, then moves into drying room and is heated to epoxy resin cure；
(3) in the periphery coiling main empty path 14 of above-mentioned internal layer winding 13, specially：2~6 point gummed papers of first coiling, then
The crimped paper of 1~3 height of coiling, 50~120mm highly bigger than a gummed paper, finally further around 2~6 point gummed papers of system；
(4) in the periphery coiling outer layer winding 15 of above-mentioned main empty path 14, specially：One layer of second conductor layer 151 of coiling, so
Afterwards in the second epoxy resin layer 152 of the outer coating layer of gel shape of the second conductor layer 151, then in second epoxy resin layer 152
Periphery coats one layer of first insulating paper 153 and one layer of first gummed paper 154 successively, is then put at the two ends of the second conductor layer 151
Put epoxy resin bar 155 to block, repeat the above steps until outer layer winding 15 reaches setting specification；Mould is taken off, the first nothing is used
Alkali containing glass fibre with 16 along short transverse coiling 1 side long wind one layer, be then charged into mould, from short side direction to outer layer around
Group is extruded to given size, is then moved into and be heated in drying room gelatinous epoxy resin cure, is taken off after the completion of solidification
Mould；
(5) at least one of which is wound along the short side of short transverse coiling 1 with drawstring 6, the two ends of the drawstring 6 are long for coil
1 bottom, C-shaped spacer 7 is placed in the both sides on the side long of coil 1 respectively, then inserts in corresponding coil 1 amorphous core 2, is exposed
In the two ends of coil 1 unshakable in one's determination 3 are sealed with dispensing paper bag, and then coil 1 and unshakable in one's determination 3 are mounted between upper clamping piece 3 and lower clamping piece 4, will
Fasten in the retainer ring 5 of lower clamping piece 4 at the two ends of drawstring 6.
In above-mentioned preparation method, the gel epoxy resin for being used refers to by epoxy resin, curing agent, accelerator, silicon
Micro mist compares 1 according to weight:1:0.1:2~3 to be mixed and heated to 75~85 DEG C of 0.5~2h of stirring uniform to being sufficiently mixed, then rises
To 85~130 DEG C of insulations to no mobility, this is conventional preparation method to temperature.
Claims (2)
1. a kind of preparation method of resistance to shorting amorphous alloy oil immersion type transformer, it is characterised in that comprise the following steps：
(1) epoxy resin of gel state is coated uniformly on grid cloth and is flattened and obtain the flexible net with epoxy resin
Lattice cloth precoats epoxy resin on DMD, and the DMD of above-mentioned flexible mesh cloth or precoating epoxy resin is wound on mould
The insulating support of specific thickness；
(2) in the periphery coiling internal layer winding of above-mentioned insulating support, specially：One layer of conductor layer No.1 of coiling, then first
Conductor layer periphery coats one layer of first insulating paper layer, if wire is not foil, one layer is first coated outside conductor layer No.1 and is coagulated
The first gluey epoxy resin layer, then one layer of first insulating paper layer is coated, repeat the above steps until internal layer winding reaches setting
Specification；Inwardly extrude internal layer winding from four vertical direction in face of internal layer winding respectively, make the four sides of internal layer winding respectively with absolutely
The bonding of edge support is integrated, after extruding is finished, in the internal layer winding gap of itself and between internal layer winding and insulating support
Epoxy resin is filled in gap, is then moved into drying room and is heated to epoxy resin cure；
(3) in the periphery coiling main empty path of above-mentioned internal layer winding, specially：The point gummed paper of first coiling specified quantity, then coiling
Highly than the described crimped paper of the highly big 50~120mm of gummed paper, finally further around the point gummed paper of specified quantity processed；
(4) in the periphery coiling outer layer winding of above-mentioned main empty path, specially：One layer of second conductor layer of coiling, then leads second
Second epoxy resin layer of the outer coating layer of gel shape of line layer, then one layer of insulation is coated successively in the second epoxy resin layer periphery
Paper and one layer of point gummed paper, then place epoxy resin bar end-blocking at the two ends of the second conductor layer, repeat the above steps until outer layer
Winding reaches setting specification；Outer layer winding is extruded to given size from short side direction, is then moved into drying room and is heated to
Gelatinous epoxy resin cure, takes off mould after the completion of solidification；
(5) at least one of which first is wound along the short side of short transverse coiling with drawstring, the two ends of the drawstring are long for coil bottom,
After the completion of step (5), the two ends of drawstring are fastened in the retainer ring of lower clamping piece；C-shaped is placed respectively in the both sides on coil side long
Dividing plate, then inserts in corresponding coil amorphous core, is then by coil and unshakable in one's determination being mounted between upper clamping piece and lower clamping piece
Can.
2. the preparation method of resistance to shorting amorphous alloy oil immersion type transformer according to claim 1, it is characterised in that：Step
(4) after the completion of outer layer winding technique described in, mould is taken off, one layer is wound along the side long of short transverse coiling with insulating tape,
Mould is then charged into, then is extruded.
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| CN201510497181.8A CN105097234B (en) | 2015-08-13 | 2015-08-13 | Preparation method for anti-short-circuit amorphous-alloy oil-immersed transformer |
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| CN105097234B true CN105097234B (en) | 2017-05-24 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105244148B (en) * | 2015-10-30 | 2017-09-01 | 江苏华鹏变压器有限公司 | It is a kind of solve the problems, such as amorphous alloy transformer resistance to shorting from clamp structure |
| CN105551773B (en) * | 2016-01-21 | 2017-09-26 | 王永法 | Resistance to shorting transformer coil and preparation method thereof |
| JP6443635B2 (en) * | 2016-02-12 | 2018-12-26 | パナソニックＩｐマネジメント株式会社 | Transformer and transformer manufacturing method |
| CN105702424B (en) * | 2016-04-21 | 2018-10-19 | 佛山市中研非晶科技股份有限公司 | A kind of amorphous alloy oil immersion type transformer and preparation method thereof of noise reduction and resistance to shorting |
| CN106098330A (en) * | 2016-08-18 | 2016-11-09 | 宁波新胜中压电器有限公司 | The winding construction of transformator and device body and the method producing this winding construction |
| CN106373756B (en) * | 2016-10-31 | 2018-01-26 | 山东华驰变压器股份有限公司 | A kind of resistance to shorting transformer and its preparation technology |
| CN108806924B (en) * | 2017-05-05 | 2024-01-23 | 特变电工智能电气有限责任公司 | Short-circuit-resistant amorphous alloy transformer and manufacturing method thereof |
| CN107180695B (en) * | 2017-07-14 | 2023-10-20 | 佛山市中研非晶科技股份有限公司 | Three-column amorphous iron core with pull plate and manufacturing method thereof |
| CN107546012A (en) * | 2017-09-29 | 2018-01-05 | 佛山市中研非晶科技股份有限公司 | A kind of amorphous alloy oil immersion type transformer of noise reduction and anti-sudden short circuit |
| CN109741934A (en) * | 2019-01-15 | 2019-05-10 | 重庆望变电气（集团）股份有限公司 | A kind of low-voltage coil of dry type transformer preparation method and low-voltage coil of dry type transformer |
| CN112349503A (en) * | 2019-08-06 | 2021-02-09 | 湖南塞凡电气科技有限公司 | Transformer manufacturing method |
| CN112309707A (en) * | 2020-10-26 | 2021-02-02 | 苏州速尼科测试设备有限公司 | Preparation process of driving coil |
| CN112466633B (en) * | 2020-11-10 | 2021-12-03 | 佛山市欧立电子有限公司 | Foil wound transformer |
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| JPS5411500B1 (en) * | 1971-05-31 | 1979-05-15 | ||
| JPS4899647A (en) * | 1972-03-31 | 1973-12-17 | ||
| JPS50151303A (en) * | 1974-05-27 | 1975-12-05 | ||
| JPS5645008A (en) * | 1979-09-19 | 1981-04-24 | Toshiba Corp | Gas-insulated transformer |
| JPS5893315A (en) * | 1981-11-30 | 1983-06-03 | Meiji Natl Ind Co Ltd | Production of inductive electromagnetic apparatus |
| JPH0690983B2 (en) * | 1984-10-22 | 1994-11-14 | 株式会社日立製作所 | Resin molded coil |
| CN1516206A (en) * | 2003-08-25 | 2004-07-28 | 广州特种变压器厂有限公司 | Resin-poured insulation dry transformer and its production method |
| CN101436461A (en) * | 2007-11-14 | 2009-05-20 | 上海置信电气股份有限公司 | Structure of amorphous alloy oil immersion type distribution transformer and manufacturing method thereof |
| CN101436460A (en) * | 2007-11-14 | 2009-05-20 | 上海置信电气股份有限公司 | Structure of amorphous alloy dry-type distribution transformer and manufacturing method thereof |
| CN202905420U (en) * | 2012-08-03 | 2013-04-24 | 安徽省科林电子有限公司 | Transformer of high insulation performance and high intensity |
| CN103050234B (en) * | 2013-01-08 | 2016-09-21 | 沈阳昊诚电气有限公司 | Dry-type transformer |
| CN103680862B (en) * | 2013-12-11 | 2015-12-09 | 上海置信电气非晶有限公司 | A kind of amorphous transformer rectangular lines is around winding and manufacture method thereof |
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