CN103128039B - Coating method of winding amorphous iron core insulating coating - Google Patents
Coating method of winding amorphous iron core insulating coating Download PDFInfo
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- CN103128039B CN103128039B CN201110394183.6A CN201110394183A CN103128039B CN 103128039 B CN103128039 B CN 103128039B CN 201110394183 A CN201110394183 A CN 201110394183A CN 103128039 B CN103128039 B CN 103128039B
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Abstract
The invention relates to a coating method of a winding amorphous iron core insulating coating. The coating method comprises a first step that a whole amorphous iron core is arranged in epoxy glue to conduct vacuum impregnation, a second step that the surface of the amorphous iron core is coated with epoxy resin, and a third step of heating and solidifying after the amorphous iron core is coated with the modified epoxy glue coating. Gaps between amorphous strips are sealed and have certain strength after the epoxy glue impregnation, the coating is neat in surface and uniform in thickness, vibration and noises of the iron core are reduced, and integrated installation is convenient. The coating is thinner than general coating technique and solidifying time is shortened. The epoxy glue enables solidifying contraction percentage to be low, the epoxy glue coating has good adhesiveness and elasticity and has little stress to the iron core, and the coating has little influence on initial magnet conductivity and inductance of the amorphous iron core. The amorphous iron core dealt with the coating method can greatly reduce no-load loss.
Description
Technical field
The present invention relates to a kind of coating method of takeup type amorphous iron core insulating coating, be mainly used in the manufacture process of amorphous iron core in the single-phase and three-phase filter reactor in amorphous transformer, inverter.
Background technology
Amorphous and nanocrystalline soft magnetic alloy material has the advantage of silicon steel and soft magnetic ferrite concurrently, there is higher saturation induction density and extremely low iron loss, thereby alternative silicon steel and part soft magnetic ferrite are for the core material of various medium-high frequency power electronic equipments, play the effect that reduces device volume, reduces equipment energy consumption.As being prepared into iron core for transformer with non-crystalline material, energy-saving effect is very remarkable, and the open circuit loss of the amorphous transformer of same capability is only 1/4th of silicon steel transformer.In wind-powered electricity generation and solar power generation grid-connecting equipment, inverter and current transformer are indispensable equipment, and the inside comprises the devices such as transformer, filter inductor.Because novel amorphous iron core has the advantages such as cost is lower, loss is low, temperature coefficient is little, for substituting the silicon sheet core of inverter, there are very large market prospects, energy-saving effect is remarkable.
Non-crystalline material is the new material that utilizes flash set technology to manufacture, amorphous iron core is to be formed by some layers of amorphous band coiling and molding or stacked extrusion modling, this lamination is easily loose, easily produce vibration and noise, simultaneously, the magnetostriction degree of non-crystaline amorphous metal is higher by approximately 10% than silicon steel sheet, and the iron core noise that also causes it to reel is larger.Because amorphous band hardness is high, thin thickness, have larger fragility in addition, it,, in producing assembling and finished product use procedure, easily produces some fragments, and these fragments can produce larger impact to the performance of product and reliability.
Traditional insulating coating coating method generally adopts at iron core external coating epoxy resin, brushing-stroke velocity is slow, surface is difficult for smooth, coating layer thickness is inhomogeneous, and coating is thicker, and the method is for amorphous iron core, can cause the filling between amorphous band closely knit not, and amorphous band is easily loose, easily produce vibration and the larger problems such as noise, affect iron core performance.
Summary of the invention
Object of the present invention, provides a kind of coating method of takeup type amorphous iron core insulating coating exactly for the problems referred to above, adopt the method to increase the activity coefficient of iron core, has reduced vibration and the noise of iron core, facilitates integral installation.
The technical scheme that the present invention adopted is in order to reach the goal:
The coating method of a kind of takeup type amorphous iron core of the present invention insulating coating, comprises the following steps:
A) whole amorphous iron core is placed in epoxy glue vacuum impregnation;
B) amorphous iron core external coating epoxy resin;
C) being heating and curing after amorphous iron core brushing modified epoxy gel coating.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, before whole amorphous iron core is placed in epoxy glue vacuum impregnation step, carries out following preparation:
First amorphous iron core is heat-treated, in stove, apply transverse magnetic field, and keep 0.5-1.5 hour under 250-400 ℃ of heat treatment temperature, after heat treatment, amorphous iron core temperature is down to 85～110 ℃, and with equipment such as hairbrush or nylon brusses, removes dust and the chip on amorphous iron core surface.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, the whole amorphous iron core of described step a is placed in the vacuum-impregnated concrete grammar of epoxy glue and is:
First used for epoxy resin alcohol is diluted by 1: 2～4 weight ratio, make epoxy glue, by in epoxy glue described in whole amorphous iron core, under vacuum condition, flood 10～15 minutes, now owing to being negative pressure, being conducive to epoxy resin fully penetrates between amorphous band gap, amorphous iron core surface forms very thin one deck epoxy coating, as more smooth in strip surface, glue soakage is relatively less, and the iron core having flooded carries out dry solidification, due to the volatilization of spirit solvent, dry solidification 10-20 minute, the weight of amorphous iron core increases by 0.05%～2%.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, the concrete grammar of described step b amorphous iron core external coating epoxy resin is:
First by epoxy resin with curing agent by 3～4: 1 weight ratio is mixed, and makes epoxy insulation coating, and at amorphous iron core external coating epoxy insulation coating, the epoxy insulation paint coatings thickness of amorphous iron core external coating is 0.1mm～0.3mm.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, the concrete grammar being heating and curing in described step c is:
The amorphous iron core that painting is brushed is sent in baking oven, and solidification temperature is 80 ℃～150 ℃, and be 30～100 minutes hardening time;
The amorphous iron core being cured, goes out after baking oven with have gentle hands light touches edge, and whether check solidifies, and as also do not parched, sends curing oven 5-10 minute back to again.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, described amorphous iron core is heating and curing after step, should carry out amorphous iron core cleaning, and concrete grammar is:
Check whether amorphous iron core surface has bubble, if there is bubble, need cut and with epoxy insulation coating, bubble place envelope be put down, sealed afterwards, then with perching knife finishing amorphous iron core edge.
Finally the iron core being cured is cut, rectangle iron core cuts in middle part, becomes C type, and port polishes.The iron space factor that coating curing is good reaches more than 0.8.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, described amorphous iron core is rectangle or annular, amorphous iron core material therefor comprises the series such as Fe-Si-B, Fe-Cu-Nb-Si-B, Fe-Zr-B, Fe-Co-Nb-Si-B, and the thickness of amorphous and nanocrystalline strip is 20-30 μ m.
The inventive method compared with the conventional method, has the following advantages:
1. after in employing the inventive method, epoxy glue floods, the gap between amorphous band is sealed, and has certain intensity, and formed coating surface is smooth, even thickness;
2. because the coating of brushing is thinner than general brushing technique, shortened hardening time;
3. iron core, after vacuum-latexed, is fully filled and is solidified by epoxy glue between amorphous band gap, has increased the activity coefficient of iron core, has reduced vibration and the noise of iron core, facilitates integral installation;
4. the epoxy glue that the present invention adopts, makes cure shrinkage lower, and the epoxy glue type coating forming has good cohesive force and elasticity, and the stress that iron core is produced is very little, and after gluing, its initial permeability and inductive impact are less;
5. adopt the amorphous iron core after this inventive method is processed can greatly reduce open circuit loss.
The specific embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
The wide amorphous state Fe78Si9B13 alloy strip steel rolled stock of 50mm is wound into rectangle volume iron core, folded thick 20mm, the wide 25mm of interior window, the high 82mm of interior window, gross weight 1.7kg.Heat treated amorphous iron core is carried out cooling, and remove amorphous iron core surface dirt and chip with the equipment such as hairbrush or nylon bruss.Complete iron core temperature to be heated drops to after 100 ℃, in homemade vacuum-latexed equipment, whole iron core is carried out to whole impregnation, and epoxy glue used is that used for epoxy resin alcohol dilutes and makes by the weight ratio of 1: 2.Flood after 10 minutes and take out, now iron core surface forms very thin one deck epoxy coating.The iron core dry solidification having flooded 10 minutes, iron core weight is 1.84kg.Carry out the integral body brushing on amorphous iron core surface, epoxy resin adopts T-620H-1 (single-component epoxy resin adhesive), mixes by the weight ratio of 3: 1 with curing agent, make epoxy insulation coating, and the coating layer thickness on amorphous iron core surface is 0.2mm.At 130 ℃, solidify 60 minutes.After curing of coatings is good, with perching knife, repair iron core edge, then rectangle iron core is cut in middle part, become C type, port polishes.The iron space factor that coating curing is good reaches 0.78.
Embodiment 2
The wide amorphous state Fe78Si9B13 alloy strip steel rolled stock of 70mm is wound into E shape iron core, iron core weight 24KG, size (window 130 * 240mm, housing 230 * 340 * 70mm).Heat treated iron core is carried out cooling, and remove amorphous iron core surface dirt and chip with the equipment such as hairbrush or nylon bruss.Complete iron core temperature to be heated drops to after 100 ℃, in homemade vacuum-latexed equipment, whole iron core is carried out to whole impregnation, and epoxy glue used is that used for epoxy resin alcohol dilutes and makes by the weight ratio of 1: 4.After dipping 15min, take out, now iron core surface forms very thin one deck epoxy coating.The iron core dry solidification 15min having flooded, iron core weight is 24.36kg.With epoxy insulation coating, carry out surface integral brushing, epoxy insulation coating is mixed and makes by the weight ratio of 4: 1 with curing agent by epoxy resin, and the epoxy insulation paint coatings thickness of brushing is 0.3mm.At 120 ℃, solidify 80min.After curing of coatings is good, with perching knife, repair iron core edge, then E shape iron core is cut in middle part, port polishes.The iron space factor that coating curing is good reaches 0.8.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (5)
1. a coating method for takeup type amorphous iron core insulating coating, is characterized in that, comprises the following steps:
A) whole amorphous iron core is placed in epoxy glue vacuum impregnation;
B) amorphous iron core external coating epoxy resin;
C) being heating and curing after amorphous iron core brushing modified epoxy gel coating,
Before whole amorphous iron core is placed in epoxy glue vacuum impregnation step, carry out following preparation:
First amorphous iron core is heat-treated, in stove, applies transverse magnetic field, and keep 0.5-1.5 hour under 250-400 ℃ of heat treatment temperature, after heat treatment, amorphous iron core temperature is down to 85～110 ℃, and remove dust and the chip on amorphous iron core surface,
The whole amorphous iron core of described step a is placed in the vacuum-impregnated concrete grammar of epoxy glue and is:
The weight ratio dilution of first used for epoxy resin alcohol being pressed to 1:2～4, makes epoxy glue, by epoxy glue described in whole amorphous iron core, under vacuum condition, flood 10～15 minutes, after dipping, dry solidification 10-20 minute, the weight of amorphous iron core increases by 0.05%～2%.
2. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, the concrete grammar of described step b amorphous iron core external coating epoxy resin is:
First epoxy resin is mixed by the weight ratio of 3～4:1 with curing agent, make epoxy insulation coating, at amorphous iron core external coating epoxy insulation coating, the epoxy insulation paint coatings thickness of amorphous iron core external coating is 0.1mm～0.3mm.
3. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, the concrete grammar being heating and curing in described step c is:
The amorphous iron core that painting is brushed is sent in baking oven, and solidification temperature is 80 ℃～150 ℃, and be 30～100 minutes hardening time;
The amorphous iron core being cured, goes out after baking oven with have gentle hands light touches edge, and whether check solidifies, and as also do not parched, sends curing oven 5-10 minute back to again.
4. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, described amorphous iron core is heating and curing after step, should carry out amorphous iron core cleaning, and concrete grammar is:
Check whether amorphous iron core surface has bubble, if there is bubble, need cut and with epoxy insulation coating, bubble place envelope be put down, sealed afterwards, then with perching knife finishing amorphous iron core edge.
5. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, described amorphous iron core is rectangle or annular.
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| CN201110394183.6A CN103128039B (en) | 2011-12-01 | 2011-12-01 | Coating method of winding amorphous iron core insulating coating |
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| CN201110394183.6A CN103128039B (en) | 2011-12-01 | 2011-12-01 | Coating method of winding amorphous iron core insulating coating |
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| CN103128039B true CN103128039B (en) | 2014-11-05 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474226A (en) * | 2013-09-06 | 2013-12-25 | 合肥鑫伟电力设备有限公司 | Iron core painting process |
| CN105097162A (en) * | 2014-05-04 | 2015-11-25 | 惠州铂科磁材有限公司 | Technology method for soft magnetic product immersion |
| CN104240933A (en) * | 2014-06-25 | 2014-12-24 | 上海置信电气非晶有限公司 | Gluing method for amorphous alloy three-dimensional wound iron core |
| CN105623462A (en) * | 2014-11-06 | 2016-06-01 | 山东海源光电科技有限公司 | Epoxy resin spray-coating method and special-purpose epoxy resin spray-coating liquid thereof |
| CN104361987B (en) * | 2014-11-06 | 2016-11-30 | 宁波奥克斯高科技有限公司 | Oil-immersed type non-crystal alloy transformer iron core coating method |
| CN106158338B (en) * | 2015-04-20 | 2018-07-24 | 上海飞晶电气股份有限公司 | A kind of manufacturing method of amorphous alloy core with ultra-thin epoxy coating |
| CN105761922A (en) * | 2016-02-19 | 2016-07-13 | 南昌大学 | Magnetic powder core mold material design and preparation technology |
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| CN105788825A (en) * | 2016-05-17 | 2016-07-20 | 江阴市晶磁电子有限公司 | Impregnation solidification type amorphous iron core and preparation method thereof |
| CN106128745B (en) * | 2016-08-18 | 2018-02-16 | 中车株洲电机有限公司 | A kind of insulation against ground processing method unshakable in one's determination and Nomex mixing bonding agents |
| CN106128746B (en) * | 2016-08-19 | 2018-11-27 | 浙江艾默可科技有限公司 | A kind of curing method reducing amorphous iron core internal stress |
| CN112430446B (en) * | 2020-11-24 | 2022-09-13 | 飞竞电机(深圳)有限公司 | Adhesive for bonding and insulating amorphous strips and preparation method and using method thereof |
| CN113035546B (en) * | 2021-03-01 | 2022-07-26 | 合肥合美电子技术有限公司 | Permalloy iron core dipping and curing process for CT electricity taking |
| CN113125918B (en) * | 2021-04-14 | 2022-05-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Preparation method of sample wafer for testing insulation performance of capacitor core of epoxy glue impregnated paper sleeve |
| CN113399234A (en) * | 2021-05-25 | 2021-09-17 | 中国科学院高能物理研究所 | Epoxy spraying insulation treatment method for superconducting undulator framework |
| CN114961401B (en) * | 2022-06-16 | 2023-08-18 | 河南永科智能电力设备有限公司 | Composite insulation type telegraph pole cross arm and manufacturing method thereof |
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| CN1979698A (en) * | 2006-11-06 | 2007-06-13 | 南昌大学 | Method for making novel ferrite/iron-base composite material soft magnetic-powder core |
| CN101840777A (en) * | 2010-05-31 | 2010-09-22 | 佛山市中研非晶科技股份有限公司 | Paint dipping method for bonding amorphous C type magnetic core by pure resin and special equipment |
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| GB2139008A (en) * | 1983-04-25 | 1984-10-31 | Hitachi Metals Ltd | Amorphous wound core |
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