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某型航空发动机润滑油的热氧化安定性研究
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江苏省自然科学基金项目( BK20161187)


Studies on Thermal Oxidation Stability of Some Aviation Lubricating Oils
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    摘要:

    通过高温高压反应釜实验模拟发动机实际工况条件,研究不同氧化温度对以聚α-烯烃合成油为基础油、2,6-二叔丁基对甲酚和对,对’-二异辛基二苯胺为抗氧剂的某型航空润滑油理化性能的影响,并根据润滑油高温氧化后产物的结构组成,分析PAO航空润滑油的氧化衰变机制。结果表明:温度越高,该型航空润滑油产生的小分子越多,黏度降低,酸值增大;抗氧剂的加入可以明显减缓油品黏度的衰减过程,并抑制小分子异构烷烃和烯烃的生成;在高温氧化衰变过程中,PAO基润滑油的高温氧化衰变经历了自由基反应历程。

    Abstract:

    Through simulating the operating condition of aviation engine by the high temperature and high pressure autoclave,the change rule of the physicchemical properties of the oil samples mixed by polyαolefin base oil and antioxidants of 2,6ditertbutyl4methylphenol and p,p’diisooctyl diphenylamine was studied at different temperature.The oxidation mechanism of PAO aviation lubricating oil was studied using a variety of modern analytical methods,and the oxidized products at high temperature were analyzed.The results show that a large number of low molecule compounds are produced in the aviation lubricating oil with the increasing of temperature,which results in the viscosity reduction and acid value increasing.The antioxidants slows down the attenuation process of viscosity significantly,and inhibits formation of small molecular alkanes and olefins.The thermal oxidation of the oil samples follows a radical reaction mechanism.

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吴楠,费逸伟,马军,郭峰.某型航空发动机润滑油的热氧化安定性研究[J].润滑与密封,2017,42(6):11-16.
. Studies on Thermal Oxidation Stability of Some Aviation Lubricating Oils[J]. Lubrication Engineering,2017,42(6):11-16.

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  • 在线发布日期: 2018-02-27
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