Effect of Wedge Angle and Wedge Material on Stress Distribution of NXJ Type Tension Clamp and Wire

doi:10.11985/2022.01.031

Abstract

Abstract:

Wedge-shaped tension clamps are widely used in power systems, but the problem of wire shedding often occurs in actual operation. The root cause of the problem is insufficient grip of the wedge-shaped clamp. A brief introduction to the structural characteristics and installation method of NXJ type tension clamp is elaborated, and finite element simulation is performed to change the mechanical strength of the clamp during operation by changing the wedge angle and wedge material of the NXJ tension clamp. The stress distribution cloud diagram of the clamp body and the wire is obtained, and the grip force of the clamp on the wire under different conditions is compared, which provides a reference for the optimization of the NXJ type tension clamp.

Key words: NXJ type tension clamp, finite element simulation, wedge angle, wedge material

CLC Number:

TM752

YAN Tao, LI Xue, WANG Yunhui, CHEN Yong. Effect of Wedge Angle and Wedge Material on Stress Distribution of NXJ Type Tension Clamp and Wire[J]. Journal of Electrical Engineering, 2022, 17(1): 251-256.

Figures/Tables 20

References 15

[1]	董吉谔. 电力金具手册第[M]. 3版北京: 中国电力出版社, 2018.
	DONG Jie. Manual of electric power fittings[M]. 3rd. ed. Beijing: China Electric Power Press, 2018.
[2]	刘振亚. 国家电网公司输变电工程通用设计10 kV及35 kV配电线路金具图册[M]. 北京: 中国电力出版社, 2013.
	LIU Zhenya. General design of power transmission and transformation project of State Grid Corporation of China 10 kV and 35 kV distribution line fittings atlas[M]. Beijing: China Electric Power Press, 2013.
[3]	赵强. 普通高等教育“十二五”规划教材. 输电线路金具理论与应用[M]. 北京:中国电力出版社, 2013. ZHAO Qiang. Teaching materials for the 12th Five-Year Plan of general higher education. Theory and application of transmission line fittings[M]. Beijing: China Electric Power Press,2013.
[4]	李媛媛. 谈架空配电线路电力金具选择与应用[J]. 电子制作, 2017(6):90-91.
	LI Yuanyuan. On the selection and application of power fittings for overhead distribution lines[J]. Electronic Manufacturing, 2017(6):90-91.
[5]	刘广忠. 10 kV线路楔型绝缘耐张线夹导线脱落原因分析[J]. 电子制作, 2017(Z1):62-63.
	LIU Guangzhong. Analysis of the reasons for the wire falling off of the wedge-shaped insulation tension clamp of 10 kV line[J]. Electronic Manufacturing, 2017(Z1):62-63.
[6]	孙贺斌, 周治伊, 李军. 耐张线夹压接质量检测及缺陷分析[J]. 电力科学与工程, 2020, 36(2):48-54.
	SUN Hebin, ZHOU Zhiyi, LI Jun. Quality testing and defect analysis of crimping of tension clamps[J]. Electric Power Science and Engineering, 2020, 36(2):48-54.
[7]	力倍金具上海有限公司. 楔型耐张线夹成功运行[J]. 电力建设, 2008(6):25.
	Libi Metalware Shanghai Co.,Ltd. Wedge-shaped tension clamp successfully operated[J]. Electric Power Construction, 2008(6):25.
[8]	包健康, 高波, 张血琴. 500 kV输电线路耐张线夹电接触计算及其发热研究[J]. 中国电力, 2016, 49(11):25-30.
	BAO Jiankang, GAO Bo, ZHANG Xueqin. Electrical contact calculation and heat generation of tension clamps for 500 kV transmission lines[J]. China Electric Power, 2016, 49(11):25-30.
[9]	夏德森. 耐张线夹在架空线路中的应用[J]. 电力金具, 2008(1):7-14.
	XIA Desen. The application of tension clamp in overhead lines[J]. Electric Power Tools, 2008(1):7-14.
[10]	戚柏林. 楔型线夹在跨江直线塔工程中的应用[J]. 电力建设, 2008(6):79-81.
	QI Bolin. The application of wedge-shaped wire clamps in the construction of straight-line tower across the river[J]. Electric Power Construction, 2008(6):79-81.
[11]	陈家慧, 赵兴虹, 刘曦. 500kV输电导线耐张线夹断裂失效分析[J]. 四川电力技术, 2020, 43(2):70-73.
	CHEN Jiahui, ZHAO Xinghong, LIU Xi. Fracture analysis of 500 kV transmission line tension clamps[J]. Sichuan Electric Power Technology, 2020, 43(2):70-73.
[12]	王邦磊, 陈燕, 王军, 等. 架空线路从耐张线夹中脱落的原因分析[J]. 农村电气化, 2016(9):34-35.
	WANG Banglei, CHEN Yan, WANG Jun, et al. Analysis of the causes of overhead lines dropping from tension clamps[J]. Rural Electrification, 2016(9):34-35.
[13]	刘纯, 陈红冬, 欧阳克俭. 碳纤维复合芯导线耐张线夹断裂分析[J]. 中国电力, 2015, 48(10):97-100,106.
	LIU Chun, CHEN Hongdong, OUYANG Kejian. Fracture analysis of tension clamp for carbon fiber composite core wire[J]. China Electric Power, 2015, 48(10):97-100,106.
[14]	SUN Mingcheng, TAN Che, ZHANG Chaoqun, et al. Analysis of strain clamp failure on 500 kV transmission line[J]. Scientific Research Publishing, 2018, 6(4):47-56.
[15]	ZHOU Yutong, ZHOU Zhengqiang, WANG Jionggeng, et al. Study on cracking of aluminum alloy strain clamps for 500 kV transmission line[J]. Solid State Phenomena, 2018, 279:10-15. doi: 10.4028/www.scientific.net/SSP.279.10

楔角/ (°)	应力最小值/ Pa	应力最大值/ (×10⁸ Pa)	最大值与最小值之差/(×10⁸ Pa)
3.41	5.493 3	2.581 2	2.581 2
4.41	6.945 6	2.214 5	2.214 5
4.90	4.181 5	1.927 3	1.927 3
5.41	7.999 0	2.897 7	2.897 7

楔块材料	应力最小值/ Pa	应力最大值/Pa	最大值与最小值之差/Pa
高密度聚乙烯	6.945 6	2.214 5×10⁸	2.214 5×10⁸
铝合金	1.09	7.118 6×10⁷	7.118 6×10⁷
ABS塑料	2 783.5	2.136 7×10⁸	2.136 7×10⁸
交联聚乙烯	263.89	3.098 8×10⁸	3.098 8×10⁸