静态热处理时间对轮毂轴承用复合锂基润滑脂流变特性的影响  

Effect of Static Heat Treatment Time on Rheological Behaviors of Hub Bearing Lithium Complex Grease

作　　者：潘家保 周彬[1] 钱明 王幼民 曹帅 

机构地区：[1]安徽工程大学机械与汽车工程学院,安徽芜湖241000 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [3]中国矿业大学机电工程学院,江苏徐州221116

出　　处：《润滑与密封》2018年第1期61-66,共6页Lubrication Engineering

基　　金：安徽高校自然科学研究项目(KJ2017A110);国家水泵及系统工程技术研究中心开放基金项目(NRCP201602);安徽工程大学引进人才科研启动基金项目(2016YQQ010)

摘　　要：为研究轮毂轴承工作过程中的热效应对复合锂基润滑脂流变性能的影响,采用静态热处理方式模拟轮毂轴承内复合锂基润滑脂的受热情况。在150℃下对润滑脂进行不同时间的热处理,并采用旋转流变仪研究各样品的流变特性变化规律。研究结果表明:短时间的静态加热处理后,复合锂基润滑脂胶体分散体系发生物理变化;皂纤维缠结程度先降低然后呈逐渐增加的趋势,出现了一定程度的固化;触变性分析表明复合锂基润滑脂的结构恢复性能随加热时间的延长而逐渐减弱。In order to study the effect of thermal action on rheological behaviors of Lithium complex grease during hub bearing work process, the lubricating grease samples were prepared by using static heating in the laboratory to simulate the thermal situation of hub bearing.The rheological properties of all experimental samples with different heated time and at 150 ~C were investigated by using rotational rheometer.It is found that the colloidal dispersion system of Lithium complex grease displays physical variation after short time heat treatment;the grease soap fibrous entanglement is weakened at first, and then gradually increased;the grease samples appears a certain level harden, and the structural recovery of grease sam- ples is decreased with the increase of heated time according to the thixotropic analysis results.

关 键 词：复合锂基润滑脂 流变特性 静态热处理 皂纤维缠结 加热时间 

分 类 号：TH117.2[机械工程—机械设计及理论]