[1]刘 洋,袁 田,徐偲达,等.静态载荷下盘形悬式绝缘子形变特性研究[J].电瓷避雷器,2019,(06):198-204.[doi:10.16188/j.isa.1003-8337.2019.06.032]
 LIU Yang,YUAN Tian,XU Sida,et al.Study on Stress-Strain Characteristics of Cap and Pin Insulator Under Static Load[J].,2019,(06):198-204.[doi:10.16188/j.isa.1003-8337.2019.06.032]
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静态载荷下盘形悬式绝缘子形变特性研究()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年06期
页码:
198-204
栏目:
绝缘子
出版日期:
2019-12-10

文章信息/Info

Title:
Study on Stress-Strain Characteristics of Cap and Pin Insulator Under Static Load
作者:
刘 洋1 袁 田2 徐偲达3 张 虎2 武文华2 周永新4
(1.中国电力科学研究院有限公司,北京 100192; 2.中国电力科学研究院有限公司,武汉 430074; 3.湖北工业大学电气与电子工程学院,武汉 430068; 4.苏州电瓷厂股份有限公司,江苏 苏州 215122)
Author(s):
LIU Yang1 YUAN Tian2 XU Sida3 ZHANG Hu2 WU Wenhua2 ZHOU Yongxin2
(1.China Electric Power Research Institute, Beijing 100192, China; 2.China Electric Power Research Institute, Wuhan 430074, China; 3.School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China; 4. Suzhou Porcelain Insulator Works Co., Ltd., Suzhou 215122, China)
关键词:
盘形悬式绝缘子 机械破坏负荷 势能释放 弹性模量
Keywords:
cap and pin insulator mechanical failing load the potential energy release elastic modulus
DOI:
10.16188/j.isa.1003-8337.2019.06.032
摘要:
机械强度属于盘形悬式绝缘子的重要指标,但在机械试验中会出现盘形绝缘子形变。为研究机械试验过程中各部件的承力及形变情况,本文以120~550 kN的盘形悬式瓷、玻璃绝缘子为研究对象,以金属材料弹性模量计算方法为基础,开展了盘形悬式绝缘子的应力应变特性研究。研究表明,盘形绝缘子形变主要集中在铁帽和钢脚处,其前期的弹性模量受到铁帽形状设计的影响,其形变值大于铸铁材料形变值的10倍; 根据Inglis理论和Griffith能量平衡理论,尽管水泥碎裂产生的势能释放有一部分由沥青的缓冲,但脆性材料的碎裂导致钢脚的应力集中,进而进入塑性形变。对120~550 kN绝缘子的整体弹性模量进行了测量,其弹性模量范围在19 712.45~23 726.10 MPa。研究可为绝缘子的运维及产品设计提供参考。
Abstract:
Mechanical strength is an important index of cap and pin insulator. But the deformation of insulator may appear in the mechanical test. In order to study the bearing capacity and mechanical deformation of each component during mechanical test, this paper studies the stress-strain characteristics of disk-type suspended porcelain and glass insulators with 120 kN~550 kN as the research object based on the calculation method of elastic modulus of metal materials. The results show that the deformation of disk insulator is mainly concentrated at the cap and pin. The early elastic modulus is influenced by the shape design of iron cap, and its deformation value is 10 times larger than that of cast iron. According to Inglis theory and Griffith energy balance theory, although the potential energy released by cement cracking is partially buffered by asphalt, the fracture of brittle materials leads to the stress concentration on the steel feet, and then enters the plastic deformation. The elastic modulus of cap and pin insulator with different tonnage was measured, and the elastic modulus was 19 712.45 MPa~23 726.10 MPa. The research can provide reference for the operation, maintenance and product design of insulators.

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备注/Memo

备注/Memo:
收稿日期:2019-07-09 作者简介:刘洋(1980—),女,工程师,主要从事高电压技术研究。 基金项目:国家电网有限公司科技项目(编号:SZW17201800161)。
更新日期/Last Update: 2019-12-10