摘要
作者在本文中主要研究了热效应对复合锂基润滑脂基础脂以及含有二烷基二硫代磷酸锌(ZDDP)的复合锂基润滑脂微观结构、润滑性能以及流变学性能的影响规律.复合锂基润滑脂经120和150℃恒温热处理24 h后,对其外观、红外光谱、边界润滑性能、弹流润滑性能和流变学性能进行了测试.研究结果表明:120℃热处理对复合锂基润滑脂性能影响较小,但基础脂以及含有抗磨添加剂的润滑脂在经历150℃热处理后,增稠剂纤维结构变得更为松散,发生明显断裂、网状结构严重破坏,在150℃下含有添加剂的复合锂润滑脂的结构强度和触变性明显变差.上述研究表明,高温条件下的热效应对润滑脂微观结构破坏更大,更容易造成润滑脂性能的显著变化.
This article mainly explored the influence of thermal effects on the microstructure,tribological properties and rheological properties of complex lithium base grease and grease with Zinc dialkyl dithiophospahtes(ZDDP). After the grease samples were heated at a constant temperature of 120 ℃ and 150 ℃ for 24 hours,their appearance,infrared spectrum,boundary lubrication performances,elastohydrodynamic lubrication performances and rheological properties were tested. The research results revealed that the thermal effect of 120 ℃ had slight effect on the overall performance of lithium complex grease. However,the soap fibers of base grease and grease with ZDDP became looser and showed some breakdown,and the gelling network were also severely damaged after heated at 150 ℃. In addition,the structural strength and thixotropy of the grease also became worse. The thermal effect at higher temperature caused more serious damage to the microstructure of the greases,which resulted in significant changes of the properties.
作者
胡金涛
张安生
张恩惠
李维民
王静
王晓波
HU Jintao;ZHANG Ansheng;ZHANG Enhui;LI Weimin;WANG Jing;WANG Xiaobo(School of Mechanical and Automotive Engineering,Qingdao Technological University,Shandong Qingdao 266520,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Qingdao Center of Resource Chemistry and New Materials,Shandong Qingdao 266100,China;College of Mechanical Engineering,Donghua University,Shanghai 201620,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2021年第4期447-454,共8页
Tribology
基金
国家自然科学基金项目(51975560)
国家重点研发项目(2018YFB2000600)
工业强基工程项目(TC190A4DA/35)资助。
关键词
复合锂基润滑脂
热效应
流变性能
微观结构
弹流膜厚
ZDDP
complex lithium grease
thermal effect
rheological properties
microstructure
elastohydrodynamic film
ZDDP