CN101299380A - Transformer high temperature index self-adhering transposition conductor and preparation method thereof - Google Patents
Transformer high temperature index self-adhering transposition conductor and preparation method thereof Download PDFInfo
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- CN101299380A CN101299380A CNA2008100546087A CN200810054608A CN101299380A CN 101299380 A CN101299380 A CN 101299380A CN A2008100546087 A CNA2008100546087 A CN A2008100546087A CN 200810054608 A CN200810054608 A CN 200810054608A CN 101299380 A CN101299380 A CN 101299380A
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Abstract
Provided is a transformer high temperature index selfadhesive transposed conductor and the preparation method, belonging to the technical field of the transformer, which solves the problems of low transposed conductor high temperature bonding strength, with the technical projects of consisting of a plurality of enamelling copper flat wire, wherein the surface of the enamelling copper flat wire is coated with the acetal paint film and the selfadhesive paint film from the interior to the exterior. The invention is improved in that, the selfadhesive paint composing the selfadhesive paint film is made of the following materials by weight: low molecular weight epoxy resin 140-160, bisphenol A90-100, quaternary ammonium salt 0.90, cresol 290-310, phenol 260-280, dimethylbenzene 370-390, aminoresin 3-4. The transposed conductor prepared according to the invention has the bonding strength in the operation temperature 75% of that in the normal temperature, and the integral bending strength is two times than that before drying, so the transposed conductor transformer advances the mechanical strength and the anti-short circuit ability of the winding, to bear larger electromagnetic force, thereby prolonging the service life of the transformer.
Description
Technical field
The present invention relates to a kind of electric conducting material and preparation method, especially for transformer coil, can resistant to elevated temperatures self-adhering transposed conductor, belong to the transformer technology field.
Background technology
At present, high-power transformer uses self-adhering transposed conductor as winding coil more, and its cementability can improve the bulk strength behind the transposed conductor coiled coil, avoids transformer coil when being subjected to rush of current to deform, and improves the stability of transformer operation.Common self-adhering transposed conductor can reach higher bonding strength under room temperature state, but under the transformer service conditions, reduce gradually with ambient temperature rising bonding strength, when temperature reaches 105 when spending, the bonding strength of two self-adhesion enameled sheet wires only be under the room temperature condition intensity about 3%, in other words, common self-adhering transposed conductor its bonding force when transformer moves is very little.The reason that causes this phenomenon mainly is because lead employed self-adhesion in preparation process coats with lacquer at high temperature due to the decreased performance, therefore improve the proportioning of self-adhesion lacquer, and, be the decisive factor that improves the self-adhering transposed conductor high-temperature bond strength according to the suitable self-adhering transposed conductor preparation technology of improved self-adhesion lacquer characteristic formulation.
Summary of the invention
Technical problem to be solved by this invention provides a kind of transformer high temperature index self-adhering transposition conductor that has higher bonding strength under the transformer service conditions; In addition, the present invention also will provide the preparation method of this lead.
The alleged problem of the present invention is solved by following technical scheme:
A kind of transformer high temperature index self-adhering transposition conductor, it is wrapped by many enameling copper strap wires and forms, described enameling copper strap wire surface applies acetal paint film and self-adhesion paint film from the inside to the outside, and its improvement is: the self-adhesion lacquer that constitutes the self-adhesion paint film is made by the raw material of following unit of weight: low-molecular-weight epoxy resin 140～160, bisphenol-A 90～100, quaternary ammonium salt 0.90, cresols 290～310, phenol 260～280, dimethylbenzene 370～390, amino resins 3～4.
A kind of transformer high temperature index self-adhering transposition conductor preparation method, it comprises joins lacquer, preparation enameling copper strap wire and preparation self-adhering transposed conductor operation; Wherein, described lacquer man's preface is carried out as follows:
Take by weighing each raw material by proportioning, in reactor, drop into low-molecular-weight epoxy resin, be heated to 100 ℃～105 ℃, drop into bisphenol-A and quaternary ammonium salt, stirring is warming up to 200 ℃～205 ℃, softening point is surveyed in sampling, drops into cresols when softening point reaches 190 ℃, treats that resin dissolves the back fully and adds phenol and dimethylbenzene, stir, cooling adds amino resins below 60 ℃, filters packing.
Above-mentioned transformer high temperature index self-adhering transposition conductor preparation method, in described preparation enameling copper strap wire operation, lead operating speed in the enamel-cover stove is controlled at 6～11 meters/min; The control of enamel wire drying oven temperature parameter is as follows: 120 ℃ of inlet temperatures, 240 ℃ of lower floor's temperature, 360 ℃ of middle level temperature, 390 ℃ of upper strata temperature, control lacquer oven temperature, degree is between 25 ℃～35 ℃ simultaneously.
Above-mentioned transformer high temperature index self-adhering transposition conductor preparation method, the described speed of a motor vehicle are 8.5 meters/min.
The present invention is directed to the low problem of common self-adhering transposed conductor high-temperature bond strength and improve, propose a kind of new self-adhesion paint formula, and formulate corresponding self-adhering transposed conductor preparation technology parameter according to these self-adhesion lacquer characteristics.The self-adhering transposed conductor high-temperature behavior that adopts above-mentioned self-adhesion lacquer and transposed conductor production technology to process is significantly improved, the bonding strength of two self-adhesion enameled sheet wires under transformer operating temperature condition, can reach 75% under the normal temperature condition approximately, improve 25 times than prior art; This self-adhering transposed conductor oven dry back integral bending under transformer operating temperature condition be before the oven dry more than 2 times.Product of the present invention is applied on the transformer, can improves mechanical Strength for Winding and anti-short circuit capability, make it can bear bigger electromagnetic force, thereby prolonged transformer useful life, improved the runnability of transformer.
Embodiment
Transposed conductor in the transformer is to be wrapped by many enameling copper strap wires to form, and the self-adhesion lacquer that the paint film on the enameling copper strap wire adopts is an important improvement of the present invention.Common self-adhesion lacquer bonding strength under hot conditions sharply descends, and causes the high-temperature mechanical property of self-adhering transposed conductor to reduce.The present invention adopts low-molecular-weight bisphenol-A type epoxy resin at high temperature to continue to take place chemical reaction with bisphenol-A under the effect of catalyst quaternary ammonium salt, make the molecular weight of epoxy resin continue to increase, make the epoxy resin softening point of its generation reach more than 190 ℃ (glass transition temperature Tg to 105 ℃), resin fully is dissolved in the mixed solvent of cresols, phenol, dimethylbenzene, adds a small amount of modifier again its bond properties is further strengthened.This self-adhesion lacquer is coated in the copper strap wire surface preparation becomes enameling copper strap wire, and and then be prepared into transposed conductor, can obtain the transformer high temperature index self-adhering transposition conductor that high-temperature behavior is better than common self-adhering transposed conductor.
Except that the improvement of self-adhesion lacquer, the present invention also will formulate suitable enameling copper strap wire production technology at the characteristics of this self-adhesion lacquer.In preparation enameling copper strap wire operation, mainly be pilot operating speed and furnace temperature curve in the enamel-cover stove.The speed of a motor vehicle is generally between 6 meters to 11 meters of per minutes.Furnace temperature parameter control is as follows: 120 ℃ of inlet temperatures, 240 ℃ of lower floor's temperature, 360 ℃ of middle level temperature, 390 ℃ of upper strata temperature between 25 ℃～35 ℃ of the control lacquer oven temperature, degree, reach the purpose of control lacquer viscosity, to guarantee the uniformity of japanning simultaneously.
Of the present invention discovering, the speed of a motor vehicle also has considerable influence to adhesion strength.Get the lead that model specification is 1.6*5.3, make enameling copper strap wire, under above-mentioned furnace temperature, carry out the test of self-adhesion lacquer adhesive property.Result of the test such as following table:
| The speed of a motor vehicle | 6 meters/min | 8.5 rice/min | 11 meters/min |
| The normal temperature adhesion strength | 10.22MPa | 9.87MPa | 9.89MPa |
| 105 ℃ of adhesion strengths | 7.02MPa | 7.49MPa | 6.15MPa |
| Comparison value | 68.69％ | 75.89％ | 62.18％ |
Above-mentioned test shows, when 8.5 meters/min of the speed of a motor vehicle, the adhesive property of enamelled wire is best.
Test to the transposed conductor performance is as follows:
Get 27 in the 1.6*5.3 millimeter enamelled wire produced by the inventive method, be prepared into transposed conductor, the transposed conductor for preparing with the common bonding lacquer and the conventional method of same specification carries out same processing, carries out whole beam test after finishing dealing with, and experimental result is as follows:
| Parameter | Common self-adhering transposed conductor | Self-adhering transposed conductor of the present invention |
| Normal temperature bending resistance value N | 7980.95N | 8552.10N |
| 105 ℃ of bending resistance values | 729.91N | 5105N |
| Comparison value | 9.15％ | 59.7.00％ |
As seen from the above table, the high-temperature behavior of product of the present invention is far above mill run.
Below provide several specific embodiments:
Embodiment 1: the self-adhesion lacquer is made by the raw material of following unit of weight: low-molecular-weight epoxy resin 150, bisphenol-A 95, quaternary ammonium salt 0.90, cresols 300, phenol 270, dimethylbenzene 380, amino resins 3.
Embodiment 2: the self-adhesion lacquer is made by the raw material of following unit of weight: the self-adhesion lacquer is made by the raw material of following unit of weight: low-molecular-weight epoxy resin 140, bisphenol-A 90, quaternary ammonium salt 0.90, cresols 310, phenol 260, dimethylbenzene 370, amino resins 3.5.
Embodiment 3: the self-adhesion lacquer is made by the raw material of following unit of weight: the self-adhesion lacquer is made by the raw material of following unit of weight: low-molecular-weight epoxy resin 160, bisphenol-A 100, quaternary ammonium salt 0.90, cresols 290, phenol 280, dimethylbenzene 390, amino resins 4.
The transformer high temperature index self-adhering transposition conductor preparation method:
1. lacquer man's preface: in reactor, drop into low-molecular-weight epoxy resin, be heated to 100 ℃, drop into bisphenol-A and catalyst, stirring is warming up to more than 200 ℃, along with viscosity increases, softening point is surveyed in sampling, drop into cresols for 190 ℃ when softening point reaches institute, make resin dissolves, the dissolving back adds phenol and dimethylbenzene fully, stir, cooling adds amino resins below 60 ℃.Sampling viscosimetric and solids content are filtered with pulling the frame filter press after reaching criterion of acceptability, the inspection outward appearance, and free from foreign meter and insoluble particle in the lacquer goes out to coat with lacquer barrelling after qualified.
2. prepare the enameling copper strap wire preparation section: wire drawing lead raw material is emitted by paying out reel, through annealing furnace annealing, the soft attitude line from annealing furnace comes out coats with lacquer the mould japanning through scraping, lead is through after scraping the lacquer mould, enter baker, the ground floor lacquer is dried through behind the baker, scrapes the lacquer mould by the 2nd road again, japanning, enter baker, generally scrape the lacquer mould, finally form enamelled wire through 10～12 roads.The speed of a motor vehicle generally between 6 meters to 11 meters of per minutes, preferred 8.5 meters/min.Furnace temperature parameter control is as follows: 120 ℃ of inlet temperatures, 240 ℃ of lower floor's temperature, 360 ℃ of middle level temperature, 390 ℃ of upper strata temperature between 25 ℃～35 ℃ of the control lacquer oven temperature, degree, reach the purpose of control lacquer viscosity, to guarantee the uniformity of japanning simultaneously.
3. prepare the self-adhering transposed conductor operation:
According to designing requirement, with on the required radical enamel-cover lead to the transposition equipment the strand cage on, radical is between 7～63, lead is emitted from the strand cage, line up two rows, through the transposition of transposition head, transposition is insulated after finishing wrapped, then by the admission machine take-up, finished product.
Claims (4)
1. transformer high temperature index self-adhering transposition conductor, it is wrapped by many enameling copper strap wires and forms, described enameling copper strap wire surface applies paint film and self-adhesion paint film from the inside to the outside, it is characterized in that: the self-adhesion lacquer that constitutes the self-adhesion paint film is made by the raw material of following unit of weight: low-molecular-weight epoxy resin 140～160, bisphenol-A 90～100, quaternary ammonium salt 0.90, cresols 290～310, phenol 260～280, dimethylbenzene 370～390, amino resins 3～4.
2. the preparation method of a transformer high temperature index self-adhering transposition conductor as claimed in claim 1, it comprises joins lacquer, preparation enameling copper strap wire and preparation transposed conductor operation, it is characterized in that: described lacquer man's preface is carried out as follows: take by weighing each raw material by proportioning, in reactor, drop into low-molecular-weight epoxy resin, be heated to 100 ℃～105 ℃, drop into bisphenol-A and quaternary ammonium salt, stirring is warming up to 200 ℃～205 ℃, softening point is surveyed in sampling, drops into cresols when softening point reaches 190 ℃, treats that resin dissolves the back fully and adds phenol and dimethylbenzene, stir, cooling adds amino resins below 60 ℃, filters packing.
3. the preparation method of transformer high temperature index self-adhering transposition conductor according to claim 2, it is characterized in that: in described preparation enameling copper strap wire operation, lead operating speed in the enamel-cover stove is controlled at 6～11 meters/min; The control of enamel wire drying oven temperature parameter is as follows: 120 ℃ of inlet temperatures, 240 ℃ of lower floor's temperature, 360 ℃ of middle level temperature, 390 ℃ of upper strata temperature, control lacquer oven temperature, degree is between 25 ℃～35 ℃ simultaneously.
4. the preparation method of transformer high temperature index self-adhering transposition conductor according to claim 3, it is characterized in that: the described speed of a motor vehicle is 8.5 meters/min.
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| CNA2008100546087A CN101299380A (en) | 2008-03-11 | 2008-03-11 | Transformer high temperature index self-adhering transposition conductor and preparation method thereof |
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| CNA2008100546087A CN101299380A (en) | 2008-03-11 | 2008-03-11 | Transformer high temperature index self-adhering transposition conductor and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142304A (en) * | 2010-11-13 | 2011-08-03 | 吴江市神州双金属线缆有限公司 | Copper-clad aluminum varnished wire processing technique |
| CN101527191B (en) * | 2009-03-31 | 2012-10-17 | 金杯电工股份有限公司 | Manufacture method of interlaid combined transposed lead |
| CN104934168A (en) * | 2015-06-09 | 2015-09-23 | 铜陵华洋特种线材有限责任公司 | Manufacturing method for high-strength self-adhesive enameled wire |
| CN108376577A (en) * | 2018-03-15 | 2018-08-07 | 无锡统力电工股份有限公司 | PVF/B self-adhering transposed conductors and preparation method thereof |
| CN112989599A (en) * | 2021-03-11 | 2021-06-18 | 云南电网有限责任公司电力科学研究院 | Winding structure improvement method for improving short-circuit resistance of transformer |
-
2008
- 2008-03-11 CN CNA2008100546087A patent/CN101299380A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527191B (en) * | 2009-03-31 | 2012-10-17 | 金杯电工股份有限公司 | Manufacture method of interlaid combined transposed lead |
| CN102142304A (en) * | 2010-11-13 | 2011-08-03 | 吴江市神州双金属线缆有限公司 | Copper-clad aluminum varnished wire processing technique |
| CN102142304B (en) * | 2010-11-13 | 2012-11-21 | 吴江市神州双金属线缆有限公司 | Copper-clad aluminum varnished wire processing technique |
| CN104934168A (en) * | 2015-06-09 | 2015-09-23 | 铜陵华洋特种线材有限责任公司 | Manufacturing method for high-strength self-adhesive enameled wire |
| CN108376577A (en) * | 2018-03-15 | 2018-08-07 | 无锡统力电工股份有限公司 | PVF/B self-adhering transposed conductors and preparation method thereof |
| CN112989599A (en) * | 2021-03-11 | 2021-06-18 | 云南电网有限责任公司电力科学研究院 | Winding structure improvement method for improving short-circuit resistance of transformer |
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