天丝纤维在变压器绝缘纸板中的应用
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摘要
天丝纤维是一种溶剂型再生纤维素纤维,研究了天丝纤维原纤化程度及其对浆料性能的影响,探讨了天丝纤维与针叶木浆配抄对变压器绝缘纸板机械性能和电气性能的影响。研究结果表明,天丝纤维容易原纤化,原纤化程度越高,纤维变得更加柔软和扭曲,表面更加粗糙,分丝帚化越多;相对100%针叶木浆抄造的绝缘纸板,针叶木浆与天丝纤维配比为85∶15配抄的绝缘纸板的紧度降低4. 8%,抗张指数下降2. 9%,吸油率提高11. 9%,在空气中的击穿电压提高5. 8%,在油中的击穿电压提高25. 8%,天丝纤维显著提高了绝缘纸板的吸油率和电气强度。
Tencel fiber is a kind of solvent type regenerated cellulose fiber. The fibrillated Tencel fiber and its influence on the performance of the slurry were studied in this paper,and the influences of different Tencel fiber ratio on the mechanical and electric performances of transformer pressboard were also investigated. The results showed that the Tencel fiber was easy to fibrillate,the higher the fibrillation degree,the fiber became more soft and twisted,more rough surface. Comparing with the insulating pressboard produced with 100% softwood kraft pulp,the density of the insulating pressboard produced with softwood kraft pulp and Tencel fiber in 85∶ 15 ratio was decreased by 4. 8%,the tensile index decreased slightly by 2. 9%,oil absorption rate increased by 11. 9%,the breakdown voltage in the air and in the oil increased by5. 8% and 25. 8%,respectively. The Tencel fiber can improve the oil absorption rate and electrical strength when the Tencel fibers was used in the insulating pressboard of power thansformer.
Tencel fiber is a kind of solvent type regenerated cellulose fiber. The fibrillated Tencel fiber and its influence on the performance of the slurry were studied in this paper,and the influences of different Tencel fiber ratio on the mechanical and electric performances of transformer pressboard were also investigated. The results showed that the Tencel fiber was easy to fibrillate,the higher the fibrillation degree,the fiber became more soft and twisted,more rough surface. Comparing with the insulating pressboard produced with 100% softwood kraft pulp,the density of the insulating pressboard produced with softwood kraft pulp and Tencel fiber in 85∶ 15 ratio was decreased by 4. 8%,the tensile index decreased slightly by 2. 9%,oil absorption rate increased by 11. 9%,the breakdown voltage in the air and in the oil increased by5. 8% and 25. 8%,respectively. The Tencel fiber can improve the oil absorption rate and electrical strength when the Tencel fibers was used in the insulating pressboard of power thansformer.
引文
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[2] Lu Yanhua,Wang Hong,Yu Tiaojuan,et al. Study on application of Tencel fiber in alkali-managanese battery separator[J]. Technical Textiles,2010,28(9):14.陆燕华,王虹,余调娟,等.天丝纤维在碱锰电池隔膜中的应用研究[J].产业用纺织品,2010,28(9):14.
[3] Lu Yanhua,Tang Baohua,Tang Renwang,et al. Study on the application of Tencel fiber in medical paper production[J]. East China Pulp and Paper Industry,2011,42(6):20.陆燕华,唐宝华,汤人望,等.天丝纤维在医疗用纸生产中的应用研究[J].华东纸业,2011,42(6):20.
[4] Shan Hongchen,Wang Yi,Long Jin,et al. Influence of fibrillation of Tencel fiber on absorption performance and pore size of paper[J].Paper Science&Technology,2017,36(1):12.单洪琛,王宜,龙金,等.天丝纤维原纤化对纸页吸液性能和孔径的影响[J].造纸科学与技术,2017,36(1):12.
[5] Chen Jiwei,Wang Xiwen. Study on the fibrillation of Tencel fiber and the performances of Tencel fiber/nonwoven composite[J]. Paper Science&Technology,2011,30(3):25.陈继伟,王习文.天丝纤维的原纤化及其与无纺布复合性能的研究[J].造纸科学与技术,2011,30(3):25.
[6] Tao Jiacheng. Study on preparation and properties of Tencel lithiumion battery separator[D]. Shanghai:Donghua University,2016.陶嘉诚.天丝基锂离子电池隔膜的制备与研究[D].上海:东华大学,2016.
[7] Lundgaard E,Hansen W,Linhjell D,et al. Aging of oil-impregnated paper in power transformers[J]. IEEE Transactions on Power Delivery,2004,19(1):230.
[8] Prevost T,Oommen T. Cellulose insulation in oil filled power transformers:Part I-history and development[J]. IEEE Electrical Insulation Magazine,2006,22(1):28.
[9] Chen Qijie,Wei Dongyun,Yan Yongxiang. Lifetime Challenges for the Insulating Pressboard of Power Transformer[J]. Hu'nan Papermaking,2015(1):17.陈启杰,魏冬云,晏永祥.电力变压器绝缘纸板绝缘寿命面临的挑战[J].湖南造纸,2015(1):17.
[10] Lv Jian,Zhan Huaiyu,Jin Huachun. Power transformer insulation paper:its properties and insulation aging[J]. China Pulp&Paper,2008,27(5):54.吕健,詹怀宇,晋华春.电力变压器绝缘纸的性能及其绝缘老化[J].中国造纸,2008,27(5):54.
[11] Yu Tian,Liang Yun,Hu Jian,et al. Fibrillation and Papermaking characteristic of two kinds of cellulose fiber[J]. Paper and Papermaking,2008,27(4):21.于天,梁云,胡健,等.两种纤维素纤维的原纤化及抄造特性[J].纸和造纸,2008,27(4):21.
[12] Zhu Yinghao. Dielectric coefficient of insulation material[J]. Transformer,1991(5):2.朱英浩.绝缘材料的介电系数[J].变压器,1991(5):2.
[13] Tang Chao,Liao Ruijin,Huang Feilong,et al. The Breakdown voltage of power transformer insulation paper after thermal aging[J]. Transactions of China Electrotechnical Society,2010,25(11):1.唐超,廖瑞金,黄飞龙,等.电力变压器绝缘纸热老化的击穿电压特性[J].电工技术学报,2010,25(11):1.