CN103400638B - A kind of Corona-resistant groove insulation material and preparation method thereof - Google Patents
A kind of Corona-resistant groove insulation material and preparation method thereof Download PDFInfo
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- CN103400638B CN103400638B CN201310325338.XA CN201310325338A CN103400638B CN 103400638 B CN103400638 B CN 103400638B CN 201310325338 A CN201310325338 A CN 201310325338A CN 103400638 B CN103400638 B CN 103400638B
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Abstract
<b> the present invention relates to a kind of Corona-resistant groove insulation material and preparation method thereof, slot liner material comprises the first adhesive layer set gradually from top to bottom, first mica paper layer, second adhesive layer, thin layer, 3rd adhesive layer, second mica paper layer and the 4th adhesive layer, first adhesive layer, second adhesive layer, 3rd adhesive layer, 4th adhesive layer is formed by nano modification adhesive respectively, nano modification adhesive is the adhesive being added with nano-powder, the content of nano-powder in nano modification adhesive is </b><bGreatT.Gre aT.GT15% ~ 25%</b><bGreatT. GreaT.GT, the particle diameter of nano-powder is </b><bGreatT.Gre aT.GT20 ~ 100nm</b><bGreat T.GreaT.GT.The Inverter fed motor life-span more existing slot liner material lift </b><bGreatT.Gre aT.GT50</b><bGre atT.GreaT.GT of insulating material of the present invention doubly more than, simultaneously can band paint amount in boosted tree impregnate with tallow process, promote mechanical property and the electrical insulation capability of curing system.In addition, the cost that slot liner material of the present invention can be lower obtains, and is conducive to industrialized large-scale production and applies.</b>
Description
Technical field
The present invention relates to a kind of insulating material, Inverter fed motor composite material particularly relating to a kind of slot liner for variable-frequency motor etc. and preparation method thereof.
Background technology
Along with electrotechniical development, the significant variable-frequency motor of energy-saving effect is used widely in recent years.The advantage of the aspects such as the frequency converter used due to variable-frequency motor produces high-frequency pulse voltage, extremely strong to the destructiveness of insulation system, often occurs the premature failure phenomenon of variable-frequency motor, really can not play the energy-conservation, efficient of variable-frequency motor, easy to use.Extend useful life and the operational reliability of variable-frequency motor, key is the corona-resistance property that will promote insulating material, can resist the impact of high-frequency pulse voltage.Variable-frequency motor now mainly contains polyester film polyester non-woven fabric composite material (DMD) with slot liner material, polyester film and aromatic polyamide paper composite material (NMN), polyimide film and aromatic polyamide paper composite material (NHN) etc., it is poor all to there is the Inverter fed motor life-span in these composite materials, can not promote the ability of variable-frequency motor opposing high-frequency pulse voltage.Therefore, existing electrical soft composite material can not meet the instructions for use of variable-frequency motor.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of slot liner material having excellent corona resistance energy, meet variable-frequency motor instructions for use.
The present invention also provides a kind of preparation method of Corona-resistant groove insulation material simultaneously.
For solving above technical problem, a kind of technical scheme that the present invention takes is:
A kind of Corona-resistant groove insulation material, it comprises the first adhesive layer, the first mica paper layer, the second adhesive layer, thin layer, the 3rd adhesive layer, the second mica paper layer and the 4th adhesive layer that set gradually from top to bottom, first adhesive layer, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer are formed by nano modification adhesive respectively, nano modification adhesive is the adhesive being added with nano-powder, the mass content of nano-powder in nano modification adhesive is 15% ~ 25%, and the particle diameter of nano-powder is 20 ~ 100nm.
According to the present invention, described nano-powder can and be preferably selected from one or more combination of nano titanium oxide, nano silicon and nano-aluminium oxide.The particle diameter of nano-powder is preferably 20 ~ 80nm, is more preferably 20 ~ 50nm.
Adhesive of the present invention can be conventional those in this area, is not particularly limited.Described nano modification adhesive then by adding nano-powder in these known adhesive, can obtain after being uniformly dispersed.The glue of nano modification adhesive is then dissolved by nano modification adhesive or be distributed to the liquid system formed in solvent.
Preferably, described nano modification adhesive is nanometer modified epoxy adhesive.According to a concrete aspect, epoxy adhesive is made up of CYD128 epoxy, F51 epoxy, 651 polyamide.According to another concrete aspect, epoxy adhesive is made up of F44 epoxy, E20 epoxy, epoxy-ester, 651 polyamide.
Preferably, the first described mica paper layer, the second mica paper layer are formed by muscovite paper, are quantitatively 60 ~ 200g/m
2.
According to the present invention, the first described mica paper layer, the thickness of the second mica paper layer can be respectively 0.05 ~ 0.2mm.Be preferably 0.10 ~ 0.15mm.
According to the present invention, described thin layer can and be preferably 0.05 ~ 0.35mm(preferably 0.15 ~ 0.35mm by thickness) polyester film or thickness be that the polyimide film of 0.05 ~ 0.15mm is formed.
Preferably, the first described adhesive layer, the second adhesive layer, the 3rd adhesive layer, the content summation of the 4th adhesive layer in insulating material are 12% ~ 40%.
Preferably, described Corona-resistant groove insulation material is prepared by the following method: at the glue of the coated on both sides nano modification adhesive of film, removal solvent is baked and banked up with earth through drying tunnel, at two sides combined mica paper, hot pressing compound, again at the glue of mica paper surface uniform coated with nano modification adhesive, removal solvent is baked and banked up with earth through drying tunnel, cooling, after rolling, is cured process, trimming, obtain, the mica flake of the first mica paper layer of gained Corona-resistant groove insulation material is mutually bonded together under the effect penetrating into adhesive wherein, forms an entirety; The mica flake of gained second mica paper layer is mutually bonded together under the effect penetrating into adhesive wherein, forms an entirety.
The another technical scheme that the present invention takes is: a kind of preparation method of above-mentioned Corona-resistant groove insulation material, first, at the glue of the coated on both sides nano modification adhesive of film, removal solvent is baked and banked up with earth through drying tunnel, at two sides combined mica paper, hot pressing compound, then at the glue of mica paper surface uniform coated with nano modification adhesive, removal solvent is baked and banked up with earth through drying tunnel, cooling, after rolling, is cured process, trimming, obtains Corona-resistant groove insulation material.
Further, the solid content of the glue of the nano modification adhesive coated by the two sides of film is 22wt% ~ 45wt%, is preferably 30wt% ~ 45wt%; Be 10wt% ~ 21wt% at the solid content of the glue of the nano modification adhesive of mica paper surface-coated, be preferably 14wt% ~ 21wt%.
Due to the employing of above technical scheme, the present invention compared with prior art tool has the following advantages:
1, make use of the corona-resistance property of mica excellence, and nano particle homogenizing electric field, reduce partial discharge, promote the corona-resistance property of material, prepare the two-sided slot liner material for mica layer, Inverter fed motor life-span more existing slot liner material, promotes more than 50 times.
2, due to two-sided be mica layer, to the absorption of impregnating resin, immersion extremely strong, can band paint amount in boosted tree impregnate with tallow process, promote mechanical property and the electrical insulation capability of curing system.
3, take insulating material of the present invention, can not use the raw material that the prices such as aromatic polyamide paper are high, cost is low, is conducive to industrialized large-scale production and applies.
Accompanying drawing explanation
Fig. 1 is the structural representation according to slot liner material of the present invention;
Embodiment
See Fig. 1, Corona-resistant groove insulation material of the present invention comprises the first adhesive layer 1, first mica paper layer 2, second adhesive layer 3, thin layer 4, the 3rd adhesive layer 5, second mica paper layer 6 and the 4th adhesive layer 7, first adhesive layer, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer that set gradually from top to bottom and is formed by nano modification adhesive respectively.
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiments are not limited to for illustration of the present invention limit the scope of the invention.Following mentioned percentage composition all refers to mass percentage.
Embodiment 1
The present embodiment provides a kind of Corona-resistant groove insulation material, and its preparation method is as follows: on coating equipment complex, thickness is that 0.05mm polyester film unreels, leaching nano modification adhesive glue A, two sides frictioning, bakes and banks up with earth removal solvent through drying tunnel, two sides composite thickness is 0.10mm mica paper, hot pressing compound, even coated with nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, Post RDBMS process, trimming, obtains Corona-resistant groove insulation material, and adhesive content is 15.6%.
Above-mentioned nano modification adhesive glue A is made up of nanometer modified epoxy adhesive 36% and solvent (toluene+acetone) 64%;
Above-mentioned nano modification adhesive glue liquid B is made up of nanometer modified epoxy adhesive 18% and solvent (toluene+acetone) 72%;
Above-mentioned nanometer modified epoxy adhesive is made up of CYD128 epoxy 40%, F51 epoxy 18%, 651 polyamide 22%, nano silicon (particle diameter is about 40nm) 20%.
Embodiment 2
The present embodiment provides a kind of Corona-resistant groove insulation material, its preparation method is as follows: on coating equipment complex, thickness is that 0.05mm polyimide film unreels, leaching nano modification adhesive glue A, two sides frictioning, bake and bank up with earth removal solvent through drying tunnel, two sides composite thickness is 0.11mm mica paper, hot pressing compound, even coated with nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, Post RDBMS process, trimming, obtains Corona-resistant groove insulation material, and adhesive content is 18.5%.
Above-mentioned nano modification adhesive glue A is made up of nanometer modified epoxy adhesive 40% and solvent (toluene+acetone) 60%;
Above-mentioned nano modification adhesive glue liquid B is made up of nanometer modified epoxy adhesive 15% and solvent (toluene+acetone) 85%;
Above-mentioned nanometer modified epoxy adhesive is made up of F44 epoxy 22%, E20 epoxy 15%, epoxy-ester 25%, 651 polyamide 20%, nano titanium oxide (particle diameter is about 25nm) 18%.
Embodiment 3
The present embodiment provides a kind of Corona-resistant groove insulation material, and its preparation method is as follows: on coating equipment complex, thickness is that 0.10mm polyester film unreels, leaching nano modification adhesive glue A, two sides frictioning, bakes and banks up with earth removal solvent through drying tunnel, two sides composite thickness is 0.12mm mica paper, hot pressing compound, even coated nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, Post RDBMS process, trimming, obtains Corona-resistant groove insulation material, and adhesive content is 13.7%.
Above-mentioned nano modification adhesive glue A is made up of nanometer modified epoxy adhesive 35.1% and solvent (toluene+acetone) 64.9%;
Above-mentioned nano modification adhesive glue liquid B is made up of nanometer modified epoxy adhesive 14.8% and solvent (toluene+acetone) 85.2%;
Above-mentioned nanometer modified epoxy adhesive is made up of E51 epoxy 40%, novolac epoxy resin (431) 18%, 651 polyamide 22%, nano-aluminium oxide (particle diameter is about 30nm) 20%.
Embodiment 4
The present embodiment provides a kind of Corona-resistant groove insulation material, its preparation method is as follows: on coating equipment complex, thickness is that the polyimide film of 0.075mm unreels, leaching nano modification adhesive glue A, two sides frictioning, bake and bank up with earth removal solvent through drying tunnel, two sides composite thickness is 0.10mm mica paper, hot pressing compound, even coated with nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, Post RDBMS process, trimming, obtains Corona-resistant groove insulation material, and adhesive content is 15.2%.
Above-mentioned nano modification adhesive glue A is made up of nanometer modified epoxy adhesive 40.6% and solvent (toluene+acetone) 59.4%;
Above-mentioned nano modification adhesive glue liquid B is made up of nanometer modified epoxy adhesive 20.2% and solvent (toluene+acetone) 79.8%.
Above-mentioned nanometer modified epoxy adhesive is by CYD128 epoxy 40%, F51 epoxy 18%, 651 polyamide 22%, and nanometer titanium dioxide two aluminium (particle diameter is about 30nm) 10%, nano silicon (particle diameter is about 50nm) 10% forms.
inverter fed motor life test
The Corona-resistant groove insulation material of embodiment 1 ~ 4 and variable-frequency motor are now carried out Inverter fed motor life test with the slot liner material Inverter fed motor life-span.Inverter fed motor lifetime testing conditions is: voltage 3000V, frequency 20KHz, temperature 155 DEG C, pulse rise time 50ns.Result is see table 1.
Table 1 Inverter fed motor life span comparison
| Slot liner composite material | Thickness (mm) | The Inverter fed motor life-span (min) |
| Embodiment 1 | 0.282 | 2880 |
| Embodiment 2 | 0.306 | 3420 |
| Embodiment 3 | 0.369 | 3960 |
| Embodiment 4 | 0.305 | 3300 |
| Commercially available DMD | 0.32 | 35 |
| Commercially available NMN | 0.32 | 51 |
| Commercially available NHN | 0.32 | 62 |
As seen from Table 1, significantly improve according to the Inverter fed motor life-span of slot liner material of the present invention more existing slot liner material.
Above-mentioned example, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations of doing according to Spirit Essence of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a Corona-resistant groove insulation material, it is characterized in that: comprise the first adhesive layer set gradually from top to bottom, first mica paper layer, second adhesive layer, thin layer, 3rd adhesive layer, second mica paper layer and the 4th adhesive layer, the first described adhesive layer, second adhesive layer, 3rd adhesive layer, 4th adhesive layer is formed by nano modification adhesive respectively, described nano modification adhesive is the adhesive being added with nano-powder, the mass content of described nano-powder in described nano modification adhesive is 15% ~ 25%, the particle diameter of nano-powder is 20nm ~ 100nm.
2. Corona-resistant groove insulation material according to claim 1, is characterized in that: described nano-powder is one or more the combination being selected from nano titanium oxide, nano silicon and nano-aluminium oxide.
3. Corona-resistant groove insulation material according to claim 1, is characterized in that: described nano modification adhesive is nanometer modified epoxy adhesive.
4. Corona-resistant groove insulation material according to claim 1, is characterized in that: the first described mica paper layer, the second mica paper layer are formed by muscovite paper, are quantitatively 60g/m
2~ 200g/m
2.
5. the Corona-resistant groove insulation material according to claim 1 or 4, is characterized in that: the first described mica paper layer, the thickness of the second mica paper layer are respectively 0.05mm ~ 0.2mm.
6. Corona-resistant groove insulation material according to claim 1, is characterized in that: described thin layer is made up of the polyimide film of thickness to be the polyester film of 0.05mm ~ 0.35mm or thickness be 0.05mm ~ 0.15mm.
7. Corona-resistant groove insulation material according to claim 1, is characterized in that: the first described adhesive layer, the second adhesive layer, the 3rd adhesive layer, the content summation of the 4th adhesive layer in described insulating material are 12% ~ 40%.
8. Corona-resistant groove insulation material according to claim 1, it is characterized in that: described Corona-resistant groove insulation material is prepared by the following method: at the glue of the coated on both sides nano modification adhesive of film, removal solvent is baked and banked up with earth through drying tunnel, at two sides combined mica paper, hot pressing compound, again at the glue of mica paper surface uniform coated with nano modification adhesive, removal solvent is baked and banked up with earth through drying tunnel, cooling, after rolling, be cured process, trimming, obtain, the mica flake of the first mica paper layer of gained Corona-resistant groove insulation material is mutually bonded together under the effect penetrating into adhesive wherein, form an entirety, the mica flake of gained second mica paper layer is mutually bonded together under the effect penetrating into adhesive wherein, forms an entirety.
9. a preparation method for the Corona-resistant groove insulation material any one of claim 1 to 8 described in claim, is characterized in that: first, at the glue of the coated on both sides nano modification adhesive of film, removal solvent is baked and banked up with earth through drying tunnel, at two sides combined mica paper, hot pressing compound, then at the glue of mica paper surface uniform coated with nano modification adhesive, removal solvent is baked and banked up with earth through drying tunnel, cooling, after rolling, is cured process, trimming, obtains Corona-resistant groove insulation material.
10. the preparation method of Corona-resistant groove insulation material according to claim 9, is characterized in that: the solid content of the glue of the nano modification adhesive coated by the two sides of film is 22wt% ~ 45wt%; Be 10wt% ~ 21wt% at the solid content of the glue of the nano modification adhesive of mica paper surface-coated.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014203744A1 (en) | 2014-02-28 | 2015-09-03 | Siemens Aktiengesellschaft | Conductive anti-corrosive paper, especially for external corona protection |
| DE102014203740A1 (en) | 2014-02-28 | 2015-09-03 | Siemens Aktiengesellschaft | Corona protection system, in particular external corona protection system for an electrical machine |
| CN104448705B (en) * | 2014-11-20 | 2017-04-12 | 绵阳润缘电工材料有限公司 | Preparation method of nanomaterial modified DMD soft composite |
| CN106626626B (en) * | 2015-11-03 | 2018-12-18 | 株洲时代电气绝缘有限责任公司 | A kind of high thermal conductivity film reinforcement mica tape and its preparation method and application |
| JP6816141B2 (en) * | 2016-07-01 | 2021-01-20 | 東芝三菱電機産業システム株式会社 | Insulation structure manufacturing method |
| CN107808715B (en) * | 2017-09-28 | 2019-04-19 | 上海新益特种电缆有限公司 | A kind of modified complex mineral insulation high-temperature-resistant noninflammability cable and its manufacturing method |
| CN108183008A (en) * | 2017-12-22 | 2018-06-19 | 苏州巨峰电气绝缘系统股份有限公司 | One kind is used for H grades of slot insulation materials of nuclear power or transformer halogen-free flameproof and preparation method and application |
| CN109605850A (en) * | 2018-11-29 | 2019-04-12 | 瑞安复合材料(深圳)有限公司 | A kind of thermoelectric generator Inverter fed motor lower shrinkage flexible insulation composite film material |
| CN110349718B (en) * | 2019-07-15 | 2020-10-13 | 瑞安复合材料(深圳)有限公司 | Corona-resistant intermediate release type insulating composite material |
| CN113963842A (en) * | 2021-10-13 | 2022-01-21 | 瑞安复合材料(深圳)有限公司 | High partial discharge insulating material for oil-cooled motor and preparation method thereof |
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| CN202695026U (en) * | 2012-06-27 | 2013-01-23 | 四川东材科技集团股份有限公司 | Double-sided polyester film mica foil |
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| GB1282015A (en) * | 1968-07-19 | 1972-07-19 | Japan Mica Ind Co Ltd | Improvements in or relating to mica paper |
| CN201084462Y (en) * | 2007-09-14 | 2008-07-09 | 苏州巨峰绝缘材料有限公司 | Corona-resistant less-glue mica tape |
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