基础油黏度对复合钛基润滑脂流变性能的影响  

Effect of viscosity of base oil on rheological properties of titanium complex grease

作　　者：牛明 郜云波 王新宇 NIU Ming;GAO Yunbo;WANG Xinyu(School of Traffic and Vehicle Engineering,Wuxi University,Wuxi 214105,Jiangsu,China)

机构地区：[1]无锡学院交通与车辆工程学院,江苏无锡214105

出　　处：《沈阳工业大学学报》2024年第6期786-791,共6页Journal of Shenyang University of Technology

基　　金：江苏省高等学校基础科学(自然科学)研究面上项目(21KJB460005,22KJB220007);江苏省双创博士人才项目(JSSCBS20210864,JSSCBS20210868);无锡学院高层次人才科研启动专项经费资助项目(2022r030,2023r030)。

摘　　要：为了揭示基础油黏度对复合钛基润滑脂流变性能的影响规律,利用变化黏度的基础油制备了4种脂样,对各脂样的屈服极限、触变性能、剪切依时性进行了探讨。利用扫描电子显微镜表征了各脂样的皂纤维形貌,在稳态剪切条件下利用R/S+旋转流变仪测试了各脂样的流变参数。结果表明:各脂样的皂纤维形貌为团聚而又贯通的网络形态,基础油的黏度会对润滑脂的流变性能产生规律性的影响;基础油黏度增大后,皂纤维结构加粗,皂纤维间的空腔增大,导致脂样的屈服极限增大、触变能增大、黏度增大、抗剪切能力增强。In order to reveal the influence of base oil viscosity on the rheological properties of complex titanium grease,four greases were prepared by using four base oils with varying viscosities,then the yield limit,thixotropy and shear-time-dependence of each grease were investigated.The morphologies of soap fibers of each grease were characterized by scanning electron microscope(SEM).Under steady shear flow conditions,the rheological parameters of each grease were tested using an R/S+rotating rheometer.Test results indicate that the soap fibers from each grease are found to form agglomerate and interconnective network morphologies,the viscosity of base oil regularly affects the rheological properties of lubricating grease,and the increasing viscosity of base oils leads to the width increase of soap fibers and the cavity enlargement among them,which in turn enhances the yield limit,thixotropic energy,viscosity and shear resistance of the greases.

关 键 词：复合钛基润滑脂 流变性能 基础油 黏度 皂纤维形貌 屈服极限 触变性能 剪切依时性 

分 类 号：TH117.2[机械工程—机械设计及理论]