动车组轴箱轴承劣化润滑脂的检测与分析
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摘要
针对动车组部分轴箱轴承运行后温度偏高和润滑脂变黑劣化的现象,对原装润滑脂和使用后的劣化润滑脂进行了检测对比,同时考虑到空心轴探伤过程中探伤耦合剂和防锈剂的影响,设计几种由原装润滑脂、探伤耦合剂和防锈剂不同掺杂方式的混合润滑脂,测试了理化性能和元素含量,研究润滑脂的红外光谱和元素含量变化。结果表明:掺杂探伤耦合剂和防锈剂后润滑脂的锥入度和钢网分油率增大,基础油析出更多,从而导致其润滑性能下降。
Aimed at that a part of EMU axle box bearings has a high working temperature,and the grease degrade and even shows a black color after operation. The original grease and degraded grease after use are detected and compared.The influence of detecting couplant and rust inhibitor during detecting process for hollow shaft is considered,the mixed grease is designed with different doping types of original grease,detecting couplant and rust inhibitor. The physical and chemical properties and element content are tested. The infrared spectroscopy and element content of grease are researched,and the analysis conclusions are given.
Aimed at that a part of EMU axle box bearings has a high working temperature,and the grease degrade and even shows a black color after operation. The original grease and degraded grease after use are detected and compared.The influence of detecting couplant and rust inhibitor during detecting process for hollow shaft is considered,the mixed grease is designed with different doping types of original grease,detecting couplant and rust inhibitor. The physical and chemical properties and element content are tested. The infrared spectroscopy and element content of grease are researched,and the analysis conclusions are given.
引文
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[2]王晓丽,刘谦,于鹤龙,等.纳米铜自修复添加剂的制备及其摩擦学性能[J].粉末冶金材料科学与工程,2006,11(6):337-340.
[3]袁幸,朱永生,张优云,等.基于正反问题的滚动轴承损伤程度评估[J].浙江大学学报(工学版),2012,46(11):1 960-1 967.
[4]邓嘉鸣.高速动车空心车轴超声波探伤工艺及探伤机的研究[J].机械设计与制造,2009(4):212-214.
[5]曾海云,段怡雄,王平华.35Cr Mo车轴疲劳裂纹超声波检测工艺方法[J].电力机车与城轨车辆,2005(6):34-37.
[6]铁道部车辆局.轮轴微机控制超声波自动探伤机探伤工艺规程[M].北京:中国铁道出版社,1998.
[7]润滑脂铜片腐蚀试验法:GB/T 7326—1987[S].