CN107160798B - 用于干式变压器线圈绕包的绝缘膜 - Google Patents
用于干式变压器线圈绕包的绝缘膜 Download PDFInfo
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Abstract
本发明涉及一种用于干式变压器线圈绕包的绝缘膜,其从上至下依次设有第一绝缘涂层、第一纤维层、第一胶黏剂层、基材层、第二胶黏剂层、第二纤维层和第二绝缘涂层;其中,所述第一绝缘涂层和第二绝缘涂层均包括以下重量份的材料:酚醛树脂100份;环氧树脂30‑35份;聚氨酯树脂10‑12份;5‑乙酰基‑2,4‑二甲基噻唑3‑5份;4,4‑二羟基二苯基甲烷3‑5份;三苯基膦0.5‑0.8份。本案通过对现有技术中绝缘膜结构和材料的改进,使得绝缘膜具备了优异的电气性能,且对线圈的包覆性强,具有较好的耐高温、抗老化性能和较高的使用寿命。
Description
技术领域
本发明涉及一种绝缘膜,具体涉及一种用于干式变压器线圈绕包的绝缘膜。
背景技术
随着供电电网的不断升级和变压器技术的进步,干式变压器得到了迅速的发展,现已广泛应用于电站、工厂、医院等场所。但随着干式变压器的发展,对于其中的线圈绕包层间绝缘材料提出了更高的要求,现有技术中的材料性能已不能完全满足干式变压器发展的需要。具体缺陷主要为:材料对线圈表面的吸附性能有限;材料表面的耐高温和耐老化性能有限等。
发明内容
针对现有技术的不足之处,本发明的目的在于提供一种用于干式变压器线圈绕包的绝缘膜,其电气性能优异,对线圈的包覆性强,耐高温抗老化,具有较高的使用寿命。
为了实现上述目的,本发明的技术方案概述如下:
一种用于干式变压器线圈绕包的绝缘膜,其从上至下依次设有第一绝缘涂层、第一纤维层、第一胶黏剂层、基材层、第二胶黏剂层、第二纤维层和第二绝缘涂层;
其中,所述第一绝缘涂层和第二绝缘涂层均包括以下重量份的材料:
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述酚醛树脂的数均分子量为30000-40000g/mol。
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述环氧树脂的数均分子量为30000-35000g/mol。
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述聚氨酯树脂的数均分子量为20000-25000g/mol。
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述第一绝缘涂层和第二绝缘涂层中还包括有2-3重量份的氧化锆。
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述第一绝缘涂层和第二绝缘涂层中还包括有2-3重量份的氧化钡。
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述第一绝缘涂层和第二绝缘涂层中还包括有4-5重量份的含氟丙烯酸酯树脂。
优选的是,所述的用于干式变压器线圈绕包的绝缘膜,其中,所述含氟丙烯酸酯树脂的数均分子量为10000-12000g/mol。
本发明的有益效果是:本案通过对现有技术中绝缘膜结构和材料的改进,使得绝缘膜具备了优异的电气性能,且对线圈的包覆性强,具有较好的耐高温、抗老化性能和较高的使用寿命。
具体实施方式
下面结合实施例对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
本案提出一实施例的用于干式变压器线圈绕包的绝缘膜,其从上至下依次设有第一绝缘涂层、第一纤维层、第一胶黏剂层、基材层、第二胶黏剂层、第二纤维层和第二绝缘涂层;基材层可选自聚酰亚胺薄膜,第一纤维层和第二纤维层可选择聚芳酰胺纤维纸或聚砜酰胺纤维纸。第一胶黏剂层和第二胶黏剂层可以选择有机硅体系胶黏剂或环氧体系胶黏剂。
其中,第一绝缘涂层和第二绝缘涂层组分相同,均包括以下重量份的材料:
上述配方中,聚氨酯树脂用于提高绝缘膜对线圈(铜线或铝线)的绕包吸附性能,使绕包不易产生气泡。5-乙酰基-2,4-二甲基噻唑用于改善绝缘涂层的耐候抗老化性能,4,4-二羟基二苯基甲烷用于改善绝缘涂层的耐高温性能,三苯基膦用于改善绝缘涂层的耐高温性能。
其中,酚醛树脂的数均分子量优选为30000-40000g/mol。
其中,环氧树脂的数均分子量优选为30000-35000g/mol。
其中,聚氨酯树脂的数均分子量优选为20000-25000g/mol。
其中,第一绝缘涂层和第二绝缘涂层中还优选包括有2-3重量份的氧化锆。
其中,第一绝缘涂层和第二绝缘涂层中还优选包括有2-3重量份的氧化钡。
其中,第一绝缘涂层和第二绝缘涂层中还优选包括有4-5重量份的含氟丙烯酸酯树脂。该含氟丙烯酸酯树脂的数均分子量优选为10000-12000g/mol。
实施例1
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表1列出实施例1所得绝缘膜(厚度为0.2mm)的性能参数:
表1
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >85 |
2 | 击穿电压/kV | >10 |
3 | 拉伸剪切强度/MPa | >3.3 |
4 | 耐受温度/℃ | >185 |
实施例2
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表2列出实施例2所得绝缘膜(厚度为0.2mm)的性能参数:
表2
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >85 |
2 | 击穿电压/kV | >10 |
3 | 拉伸剪切强度/MPa | >3.4 |
4 | 耐受温度/℃ | >185 |
实施例3
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表3列出实施例3所得绝缘膜(厚度为0.2mm)的性能参数:
表3
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >90 |
2 | 击穿电压/kV | >11 |
3 | 拉伸剪切强度/MPa | >3.4 |
4 | 耐受温度/℃ | >200 |
实施例4
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表4列出实施例4所得绝缘膜(厚度为0.2mm)的性能参数:
表4
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >90 |
2 | 击穿电压/kV | >11 |
3 | 拉伸剪切强度/MPa | >3.4 |
4 | 耐受温度/℃ | >200 |
实施例5
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表5列出实施例5所得绝缘膜(厚度为0.2mm)的性能参数:
表5
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >92 |
2 | 击穿电压/kV | >11 |
3 | 拉伸剪切强度/MPa | >3.5 |
4 | 耐受温度/℃ | >210 |
实施例6
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表6列出实施例6所得绝缘膜(厚度为0.2mm)的性能参数:
表6
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >92 |
2 | 击穿电压/kV | >11 |
3 | 拉伸剪切强度/MPa | >3.6 |
4 | 耐受温度/℃ | >210 |
实施例7
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表7列出实施例7所得绝缘膜(厚度为0.2mm)的性能参数:
表7
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >91 |
2 | 击穿电压/kV | >12 |
3 | 拉伸剪切强度/MPa | >3.8 |
4 | 耐受温度/℃ | >220 |
实施例8
将第一纤维层(聚芳酰胺纤维纸)、第一胶黏剂层(环氧体系胶黏剂)、基材层(聚酰亚胺薄膜)、第二胶黏剂层(环氧体系胶黏剂)、第二纤维层(聚芳酰胺纤维纸)按从上之下的顺序压制为一个整体,随后在该整体表面涂布绝缘涂料,随后在150℃下烘焙2min除去溶剂,即获得两面含有第一绝缘涂层和第二绝缘涂层的绝缘膜。
绝缘涂层包括以下材料:
绝缘涂料即在上述材料的基础上配以等质量的有机溶剂,该有机溶剂可选择丙酮或乙酸乙酯。
表8列出实施例8所得绝缘膜(厚度为0.2mm)的性能参数:
表8
序号 | 项目 | 测试值 |
1 | 拉伸强度/N/10mm | >92 |
2 | 击穿电压/kV | >12 |
3 | 拉伸剪切强度/MPa | >3.8 |
4 | 耐受温度/℃ | >220 |
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出的实施例。
Claims (7)
1.一种用于干式变压器线圈绕包的绝缘膜,其特征在于,其从上至下依次设有第一绝缘涂层、第一纤维层、第一胶黏剂层、基材层、第二胶黏剂层、第二纤维层和第二绝缘涂层;
其中,所述第一绝缘涂层和第二绝缘涂层均包括以下重量份的材料:
所述第一绝缘涂层和第二绝缘涂层中还包括有2-3重量份的氧化锆。
2.根据权利要求1所述的用于干式变压器线圈绕包的绝缘膜,其特征在于,所述酚醛树脂的数均分子量为30000-40000g/mol。
3.根据权利要求1所述的用于干式变压器线圈绕包的绝缘膜,其特征在于,所述环氧树脂的数均分子量为30000-35000g/mol。
4.根据权利要求1所述的用于干式变压器线圈绕包的绝缘膜,其特征在于,所述聚氨酯树脂的数均分子量为20000-25000g/mol。
5.根据权利要求4所述的用于干式变压器线圈绕包的绝缘膜,其特征在于,所述第一绝缘涂层和第二绝缘涂层中还包括有2-3重量份的氧化钡。
6.根据权利要求1所述的用于干式变压器线圈绕包的绝缘膜,其特征在于,所述第一绝缘涂层和第二绝缘涂层中还包括有4-5重量份的含氟丙烯酸酯树脂。
7.根据权利要求6所述的用于干式变压器线圈绕包的绝缘膜,其特征在于,所述含氟丙烯酸酯树脂的数均分子量为10000-12000g/mol。
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