某型航空发动机润滑油性能结构热衰变机制研究  

Thermal Degradation Mechanism of Performance and Structure of an Aviation Lubricating Oil

作　　者：郭峰[1] 费逸伟[1] 姚婷[1] 彭兴隆[1] 

机构地区：[1]空军勤务学院航空油料物资系,江苏徐州221006

出　　处：《润滑与密封》2015年第8期103-108,148,共7页Lubrication Engineering

摘　　要：某型航空润滑油主要由基础油聚α-烯烃(PAO)和抗氧剂N-苯基-α-萘胺(T531)组成。借助高温高压反应釜模拟航空发动机温度,研究不同温度下抗氧剂T531对PAO理化性能的影响,并利用气相色谱/质谱联用(GC/MS)技术从分子水平上分析反应产物的结构组分变化,探究PAO和T531的高温衰变机制。结果表明,高温促使PAO基础油发生分子链断裂反应并产生了含氧化合物,致使PAO黏度降低和酸值升高;在一定温度范围内T531较好地延缓了PAO分子链的断裂;T531长时间在高温环境中也会发生衰变,产生大量链状酮类化合物,加深了润滑油颜色。An aviation lubricating oil is mainly composed of poly-α-olefin （PAO） as base fluids and N-phenyl-α-napla- thylamine （T531） as anti-oxidant. By stimulating temperatures of an aviation engineer in a high temperature and high pressure autoclave, the influence of anti-oxidant T531 under different temperatures on the physic-chemical property of PAO was researched, the changes of compounds and structures were analyzed by joint technologies of GC/MS at molecular levels, and the thermaldegradation mechanism of PAO and T531 was investigated. The results show that the molecular chain breakage and the oxidative reactions of PAO base fluids were prominent at high temperature, which caused reducing of lubricant viscosity and raising the acid value of PAO. T531 is helpful to T531 is quite helpful to slow down the molecu- lar chain breakage of PAO in a certain temperature range. T531 is also a large number of chain ketones compounds are produced, which leads degraded at high temperature for a long time, and to the color deepening of lubricating oils.

关 键 词：聚Α-烯烃 基础油 N-苯基-α-萘胺 高温衰变 机制分析 

分 类 号：TQ041.7[化学工程] TH117.2[机械工程—机械设计及理论]