纳米CaCO_(3)颗粒对润滑脂性能影响的研究  

Study on the Effect of Nano-CaCO_(3) Particles on the Performance of Lubricating Greases

作　　者：王宇 张斌 张向军[2] 胡志红 王哲 WANG Yu;ZHANG Bin;ZHANG Xiangjun;HU Zhihong;WANG Zhe(Tianjin Research Institute for Advanced Equipment,Tsinghua University,Tianjin 300300,China;State Key Laboratory of Tribology in Advanced Equipment,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学天津高端装备研究院,天津300300 [2]清华大学高端装备界面科学与技术全国重点实验室,北京100084

出　　处：《润滑与密封》2024年第9期88-93,共6页Lubrication Engineering

摘　　要：在锂基基础脂中添加纳米碳酸钙添加剂并添加一定量的基础油,制备2种润滑脂,其中一种仅添加基础油,另一种同时添加基础油和纳米碳酸钙。对2种润滑脂进行分散性、滴点、锥入度、氧化诱导期、表观黏度等理化性能测试,并通过摩擦试验研究2种润滑脂的摩擦学特性,探究纳米碳酸钙的加入对润滑脂性能的影响。结果表明:纳米碳酸钙在皂基中的分布尺寸基本小于1μm,绝大部分颗粒尺寸处于150~300 nm之间;在锂基基础脂中加入基础油及纳米碳酸钙添加剂后,润滑脂滴点、锥入度变化不大,而氧化性能下降;2种润滑脂与基础脂相比触变性基本一致,纳米碳酸钙的加入并未破坏润滑脂网状结构的强度,未改变润滑脂的稳定性;在200 N载荷和温度50℃下,含纳米碳酸钙润滑脂需要经过一定时间的磨合才能表现出较好的抗磨性能,而当温度为100℃时,纳米CaCO_(3)的加入可能会造成摩擦副磨损的增加。Two lubricating greases were prepared by adding nano calcium carbonate and a certain amount of base oil to lithium based grease.One of them only added base oil,while the other added both base oil and nano calcium carbonate simultaneously.The physical and chemical properties of the two lubricating greases,including dispersibility,drop point,cone penetration,oxidation induction period,and apparent viscosity,were tested.Friction tests were also conducted to observe and study the tribological properties of the two lubricating greases,and the effect of the addition of nano calcium carbonate on the performance of the lubricating grease was explored.The results show that the distribution size of nano calcium carbonate in soap base is basically less than 1μm,and the majority of particle sizes are between 150 nm to 300 nm.After adding base oil and nano calcium carbonate additives to lithium based grease,the droplet point and cone penetration of the grease have little change,while the oxidation performance decreases.The thixotropy of the two lubricating grease is basically the same as that of the base grease.The addition of nano calcium carbonate does not damage the strength of the lubricating grease network structure and does not change the stability of the lubricating grease.At a load of 200 N and a temperature of 50℃,the nano calcium carbonate lubricating grease can exhibit good anti-wear performance only after a certain period of running in.However,when the temperature is 100℃,the addition of nano CaCO_(3) may cause an increase in friction pair wear.

关 键 词：润滑脂 纳米碳酸钙 理化性能 摩擦性能 

分 类 号：TH117.1[机械工程—机械设计及理论] TG113.25[金属学及工艺—物理冶金]