冰水浴和自然冷却条件下锂基润滑脂的流变学性能  

Rheology of Lithium Greases under Iced Water and Room Air

作　　者：许俊[1,2] 徐楠[1] 王晓波[1] 刘维民[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院北京研究生院,北京100049

出　　处：《摩擦学学报》2013年第4期406-412,共7页Tribology

基　　金：国家重点基础研究发展计划973计划项目(2011CB706603)资助~~

摘　　要：通过两种不同冷却方式制得锂基润滑脂,采用HAAKE流变仪考察了锂基润滑脂的流变特性,从流变学的角度分析了润滑脂在动态条件下的实时变化,并与其胶体安定性和机械安定性等性能进行了比较.结果表明:锂基润滑脂的流变性能可以很好地反映出润滑脂的胶体安定性和机械安定性;在测试应力范围内,于自然冷却条件下制备的润滑脂结构变化为可逆变化,而冰水浴制备的润滑脂结构容易遭到不可逆的破坏.The rheological properties of two kinds of lithium greases under different cooling conditions were studied by using HAAK rheometer.From the rheological viewpoint,the dynamic changes and the rheological parameters（colloid stability and mechanical stability） of lithium greases were investigated.The results show that the greases rheology was in good agreement with their basic properties.And in the range of experiments,the greases in room air had reversible changes of the microstructures,while those in iced water were destroyed irreversibly.

关 键 词：润滑脂 流变性 冷却速率 表观黏度 

分 类 号：TH117.2[机械工程—机械设计及理论]