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首页> 外文会议>Leeds-Lyon Symposium on Tribology; 20040907-10; Leeds(GB) >Electrostatic monitoring of the effects of carbon black on lubricated steel/steel sliding contacts
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Electrostatic monitoring of the effects of carbon black on lubricated steel/steel sliding contacts

机译：静电监测炭黑对润滑钢/钢滑动触点的影响

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摘要

The aim of this work is to understand better the relationship between the wear of sliding tribo-contacts and soot contamination in diesel lubricants, as modelled by the presence of carbon black. The work examined sensitivities between charge and wear induced by carbon black-contaminated lubricants. Previous research, using a pin-on-disc (POD) tribometer, has shown correlations between wear, friction and temperature with electrostatic charge detected by sensors mounted a distance from the contact but focused on the disc wear track. These correlations were found for both steel/steel and steel/Si_3N_4 contacts lubricated by uncontaminated base oils and commercial aviation oils. The present test programme has been carried out on a pin-on-disc tribometer which was instrumented with Linear Variable Differential Transformer (LVDT), temperature and friction transducers, as well as an electrostatic wear site sensor. The test conditions of 5m/s sliding velocity and a contact stress of 2.05 GPa were chosen to match test conditions used previously. Results from a preliminary test programme which varied the detergents, dispersants and carbon black in lubricants are discussed. Comparisons between the wear rates, friction, disc surface temperature, oil conductivity, oil chemistry, and electrostatic charge are presented for the various Group 1 oil formulations. These studies suggest designs for a systematic matrix to understand how charged additive and/or contaminant species influence wear and performance over time. Analysis using optical spectroscopy and 3-D profilometry of the worn surfaces of the pin and disc were used to identify the wear mechanisms.
机译：这项工作的目的是通过炭黑的存在来更好地理解滑动摩擦接触的磨损与柴油机润滑油中烟灰污染之间的关系。这项工作检查了受炭黑污染的润滑剂引起的电荷与磨损之间的敏感性。以前的研究使用销钉盘式（POD）摩擦计，显示了磨损，摩擦和温度之间的相关性，这些静电是由与触点相距一定距离但集中在磁盘磨损轨迹上的传感器检测到的静电荷。对于用未污染的基础油和商用航空油润滑的钢/钢和钢/ Si_3N_4触头，都发现了这些相关性。当前的测试程序是在圆盘摩擦计上执行的，该圆盘摩擦计配备了线性可变差动变压器（LVDT），温度和摩擦传感器以及静电磨损部位传感器。选择5m / s滑动速度和2.05 GPa接触应力的测试条件以匹配先前使用的测试条件。讨论了初步测试程序的结果，该程序改变了润滑剂中的清洁剂，分散剂和炭黑。列出了各种第1组油配方的磨损率，摩擦，盘表面温度，油电导率，油化学性质和静电荷之间的比较。这些研究建议设计一个系统的矩阵，以了解带电的添加剂和/或污染物种类如何随时间影响磨损和性能。使用光学光谱法和销钉和圆盘磨损表面的3-D轮廓测量法进行分析，以确定磨损机理。

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