中国机械工程 ›› 2024, Vol. 35 ›› Issue (11): 2063-2070.DOI: 10.3969/j.issn.1004-132X.2024.11.018

• 工程前沿 • 上一篇    下一篇

核安全级DCS设备危险频率下的电接触摩擦学特性

王东伟;李发强;赵阳;黄起昌;汪凡雨;刘滨   

  1. 中国核动力研究设计院核反应堆系统设计技术重点实验室,成都,610213
  • 出版日期:2024-11-25 发布日期:2024-12-18
  • 作者简介:王东伟,男,1988年生,博士、高级工程师。研究方向为载流摩擦学、机械系统动力学、核仪控可靠性等。发表论文50余篇。Email:dongwei1013@sina.cn。
  • 基金资助:
    国家自然科学基金(52105220);四川省自然科学基金(2022NSFSC1950)

Tribological Performance of Electrical Contacts at Risk Frequency of Nuclear Safety Level DCS Equipment

WANG Dongwei;LI Faqiang;ZHAO Yang;HUANG Qichang;WANG Fanyu;LIU Bin   

  1. Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute
    of China,Chengdu,610213

  • Online:2024-11-25 Published:2024-12-18

摘要: 为研究核安全级分布式控制系统(DCS)设备中的电接触摩擦学特性,对核安全级DCS设备的危险频率进行了评估。建立了一套球面电接触摩擦学试验装置,在危险频率下进行了一系列载流摩擦学试验,探索不同电流作用下界面摩擦磨损特性。研究结果表明,核安全级DCS设备的危险频率为12 Hz;在该频率下,随着输入电流从1 A增大至3 A,摩擦因数呈现先减小后增大的趋势;在大电流作用下,电接触达到失效的时长显著增长;电接触界面表现出划痕、颗粒、微裂纹、磨屑堆积和磨屑飞溅等5种特征;虽然接触区域存在一定的氧化产物,但是只要有足够多的接触区域实现导电通路,界面依然能够保持良好的电接触状态。

关键词: 核安全级DCS, 电接触, 摩擦磨损, 表面分析

Abstract: To study the tribological characteristics of electrical contacts in nuclear safety level DCS equipment, the risk frequency of the equipment was evaluated. A set of ball-on-flat tribological test apparatus was established to conduct a series of current-carrying friction tests at the risk frequency. The interfacial friction and wear characteristics under different input electric currents were investigated and the results show that the risk frequency of the nuclear safety level DCS equipment is as 12 Hz. At this frequency, as the input current increases from 1 A to 3 A, the friction coefficient shows a trend of decreasing first and then increasing. Under high-current conditions, the duration until electrical contact failure significantly increases. The electrical contact interfaces exhibit five features: scratches, particles, micro-cracks, debris accumulation and splashing. Although there are some oxidation products in the contact areas, as long as there are enough contact areas to achieve conductivity path, the interface may still maintain good electrical contact status.

Key words: nuclear safety level DCS, electrical contact, friction and wear, surface analysis

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