Study on Hygroscopic and Moisture Absorption Characteristic of Polyurethane Core of Post Insulator Under Humid Environment

LIU Shizeng; MA Yigang; FU Zhiwei; GUAN Xiyuan; WU Yansong; MEI Hongwei; WANG Liming

doi:10.13296/j.1001-1609.hva.2022.06.009

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Study on Hygroscopic and Moisture Absorption Characteristic of Polyurethane Core of Post Insulator Under Humid Environment

更新时间：2025-04-26

- Study on Hygroscopic and Moisture Absorption Characteristic of Polyurethane Core of Post Insulator Under Humid Environment
- High VoltageApparatus Vol. 58, Issue 6, Pages: 64-69+76(2022)
- 作者机构：
  
  1. 中国南方电网有限责任公司超高压输电公司大理局
  2. 三峡大学电气与新能源学院
  3. 清华大学深圳国际研究生院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2022.06.009
  CLC： TQ317;TM216
- Published：2022
- 稿件说明：
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LIU Shizeng, MA Yigang, FU Zhiwei, et al. Study on Hygroscopic and Moisture Absorption Characteristic of Polyurethane Core of Post Insulator Under Humid Environment[J]. High voltageapparatus, 2022, 58(6): 64-69+76.
DOI：

LIU Shizeng, MA Yigang, FU Zhiwei, et al. Study on Hygroscopic and Moisture Absorption Characteristic of Polyurethane Core of Post Insulator Under Humid Environment[J]. High voltageapparatus, 2022, 58(6): 64-69+76. DOI： 10.13296/j.1001-1609.hva.2022.06.009.

摘要

灌注式支柱绝缘子内部使用聚氨酯材料填充，聚氨酯芯体特性是支柱绝缘子绝缘问题研究的重点。水分侵入会降低其绝缘强度，危害支柱绝缘子的运行可靠性。文中通过试验研究了潮湿环境下聚氨酯芯体的吸湿特性、吸水特性和水分在聚氨酯中的渗透特性。研究结果表明，水分在聚氨酯芯体中的渗透特性符合Langmuir模型；聚氨酯材料吸湿过程呈现出饱和曲线；水分在聚氨酯芯体中的渗透路径是聚氨酯的高分子网架，渗水质量与时间成线性正关系；聚氨酯B料比例增大时样品的吸湿能力、吸水能力、渗水速度都将提高；聚氨酯样品厚度与水分的渗透速率成反比；绝缘子良好的密封性能可以提高其使用寿命。

Abstract

Polyurethane material is used to fill the interior of perfusion post insulator and the characteristics of polyurethane core is the key problem in the research of internal insulation of the post insulator. Moisture intrusion will reduce its insulation strength and endanger the reliable operation of the support insulator. In this paper

the hygroscopic absorption characteristics

moisture absorption characteristics and moisture penetration characteristics of polyurethane core are studied. The study results show that the permeability of moisture in polyurethane core conforms to the Langmuir model;the hygroscopic absorption process of polyurethane material presents the saturation curve;the permeability path of moisture in polyurethane core is the polymer grid of polyurethane

and the moisture penetration quality is a linear positive relationship with time. In case of increase of proportion of polyurethane B component

the hygroscopic absorption capacity

moisture absorption capacity and moisture penetration speed will be increased;the thickness of polyurethane sample is inversely proportional to the permeation rate of moisture;and the good sealing performance of insulator can improve its service life.

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