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Greased Rolling Bearings Deterioration in the Presence of the Electrical Field

机译：电场作用下润滑脂的滚动轴承性能下降

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摘要

Lubrication aspects,in extreme operating conditions,highlights important problems concerning bearings design or greases behaviour management forgiven operating conditions.The researches that were done in the last period were focused on greases service life and behaviour versus rolling bearings operating conditions but,it must be emphasized,that some particular aspects such as the presence of the electrical fields were less studied.Some results in this specific area were previously forwarded by Prashad who highlighted issues such as greases resistiuity modifications with time,particular bearings and lubricating greases damaging mechanisms.Aspects concerning temperature influence on grease resistiuity,correlations between greases structural,physical and chemical deterioration and bearings specific failures,in the presence of the electrical field,are questions that must be answered.These problems are very important because electrical rotating machines support bearings reliability is strongly dependant on greases service life and performances.The paper presents some correlations between the electrical field characteristics and electrical motors rotors support rolling bearings greases deterioration based on lubricant's SEM and raceways microscopical analyses.Starting from these results it can be concluded that rolling bearings deterioration under the influence of the electrical field is a complex phenomenon with effects,both,on lubricating greases and bearings rolling contact surfaces.From this point,a greases deterioration model,in the presence of the electrical field,will be proposed.
机译：润滑方面，在极端工作条件下，突出显示了与轴承设计或润滑脂行为管理有关的重要问题。在上一阶段所做的研究集中在润滑脂的使用寿命和性能与滚动轴承的工作状况之间，但必须强调因此，对某些特定方面（例如电场的存在）的研究较少。在此特定领域中的某些结果先前由Prashad提出，他着重指出了诸如脂抗性随时间变化，特定轴承和润滑脂损坏机理等问题。关于温度的方面在存在电场的情况下，对油脂抵抗力的影响，油脂结构，物理和化学劣化之间的相关性以及轴承的特定故障是必须回答的问题。这些问题非常重要，因为旋转电机支持轴承的可靠性根据润滑脂的使用寿命和性能，本文提出了电场特性与电动机转子支撑滚动轴承润滑脂劣化的一些相关性（基于润滑剂的SEM和滚道显微分析），从这些结果可以得出结论，在润滑脂的作用下滚动轴承劣化电场的影响是一个复杂的现象，对润滑脂和轴承的滚动接触面都有影响。从这一点出发，将提出一个在电场存在下的润滑脂劣化模型。

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