Probing the effect of displacement on electrical contact tribological behavior at the risk frequency of nuclear safety DCS equipment

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL Industrial Lubrication and Tribology Pub Date : 2024-06-04 DOI:10.1108/ilt-03-2024-0098

Dongwei Wang, Faqiang Li, Yang Zhao, Fanyu Wang, Wei Jiang

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Abstract

Purpose

This paper aims to study the tribological characteristics of the electrical contact system under different displacement amplitudes.

Design/methodology/approach

First, the risk frequency of real nuclear safety distributed control system (DCS) equipment is evaluated. Subsequently, a reciprocating friction test device which is characterized by a ball-on-flat configuration is established, and a series of current-carrying tribological tests are carried out at this risk frequency.

Findings

At risk frequency and larger displacement amplitude, the friction coefficient visibly rises. The reliability of the electrical contact system declines as amplitude increases. The wear morphology analysis shows that the wear rate increases significantly and the degree of interface wear intensifies at a larger amplitude. The wear area occupied by the third body layer increases sharply, and the appearance of plateaus on the surface leads to the increase of friction coefficient and contact resistance. EDS analysis suggests that oxygen elements progressively arise in the third layer as a result of increased air exposure brought on by larger displacement amplitude.

Originality/value

Results are significant for recognizing the tribological properties of electrical connectors in nuclear power control systems.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2024-0098/

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探测核安全 DCS 设备风险频率下位移对电接触摩擦学行为的影响

目的本文旨在研究不同位移幅值下电气接触系统的摩擦学特性。首先，对实际核安全分布式控制系统（DCS）设备的风险频率进行了评估。结果在风险频率和较大位移幅值下，摩擦系数明显升高。电接触系统的可靠性随着振幅的增大而降低。磨损形态分析表明，当振幅较大时，磨损率明显增加，界面磨损程度加剧。第三体层所占的磨损面积急剧增大，表面出现高原，导致摩擦系数和接触电阻增大。EDS 分析表明，由于位移振幅增大导致接触空气增加，第三层中逐渐产生了氧元素。原创性/价值研究结果对于认识核电控制系统中电气连接器的摩擦学特性具有重要意义。同行评审本文的同行评审记录可在以下网址查阅：https://publons.com/publon/10.1108/ILT-03-2024-0098/

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来源期刊

Industrial Lubrication and Tribology 工程技术-工程：机械

CiteScore

3.00

自引率

18.80%

发文量

129

审稿时长

1.9 months

期刊介绍： Industrial Lubrication and Tribology provides a broad coverage of the materials and techniques employed in tribology. It contains a firm technical news element which brings together and promotes best practice in the three disciplines of tribology, which comprise lubrication, wear and friction. ILT also follows the progress of research into advanced lubricants, bearings, seals, gears and related machinery parts, as well as materials selection. A double-blind peer review process involving the editor and other subject experts ensures the content''s validity and relevance.