镀银层参数对配电开关柜内固定搭接电连接接触部位导电性影响的仿真分析和实验研究  

Simulation analysis and experimental study on electrical conductivity of the contact part of fixed lap joint in distribution switchgear under the influence of silver coating with different properties

作　　者：余亚东 孙浩 薛亚许 YU Yadong;SUN Hao;XUE Yaxu(College of Electrical and Mechanical Engineering,Pingdingshan University,Pingdingshan 467000,China;College of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]平顶山学院电气与机械工程学院,河南平顶山467000 [2]郑州大学电气与信息工程学院,河南郑州450001

出　　处：《电镀与涂饰》2024年第3期22-30,共9页Electroplating & Finishing

基　　金：河南省科技攻关专项:基于多模态感知的仿生多指灵巧机械手控制关键技术研究(232102211022)。

摘　　要：[目的]配电开关柜内固定搭接的导电性是确保开关柜可靠运行的重要参数。为提高固定搭接的导电能力,工业上目前主要在其接触部位采取镀银处理,但缺乏镀银层厚度、表面粗糙度和硬度对固定搭接部位导电性影响的研究,亟需给出合理的设计标准。[方法]以配电开关柜内的母排固定搭接为研究对象,通过构建三维多物理场耦合有限元模型研究了镀银层厚度、表面粗糙度、硬度及涂覆电力润滑脂对其接触部位导电性的影响,并投制了1∶1尺寸的试验样件进行实验验证。[结果]在母排固定搭接电连接接触部位镀银能够提高接触表面的导电性,镀银层的粗糙度和硬度对接触部位的导电性有一定的影响,镀银层厚度的影响则较小。涂覆电力润滑脂能够显著提高固定搭接接触部位的导电性。[结论]本文的研究结果可为配电开关柜内固定搭接电接触部位Ag镀层参数的标准化设计提供理论与实验依据。[Introduction]The electrical conductivity of the fixed lap joint in distribution switchgear is an important parameter to ensure the reliable operation of switchgear.In order to improve the conductivity of fixed lap joint,its contact part is usually plated with silver.However,there is few research on the effects of the properties of silver coating i.e.thickness,surface roughness,and hardness on the electrical conductivity of fixed lap joint.It is urgent to develop a reasonable design standard.[Method]A three-dimensional multi-physical field coupling model was established by finite element method to study the dependence of the electrical conductivity of the contact part of the fixed lap joint of busbar in a distribution switchgear on the thickness,surface roughness,and hardness of the silver coating electroplated on it and further being coated with electric grease.The simulation results were verified experimentally using some specimens with the same size as the product.[Result]The electrical conductivity could be improved by plating with silver on the contact part of fixed lap joint.Both surface roughness and hardness of silver coating have a certain influence on the electrical conductivity of contact part,while the thickness of silver coating has little effect on the electrical conductivity of contact part.The conductivity of fixed lap joint can be improved significantly by coating with electric grease further.[Conclusion]This research provides a theoretical basis and experimental reference for the standardized design of Ag coating on electrical contact part of fixed lap joint.

关 键 词：配电开关柜 固定搭接 镀银层 导电性 温升 仿真分析 电力润滑脂 

分 类 号：TQ153.16[化学工程—电化学工业] TM930.1[电气工程—电力电子与电力传动]