摘要
目的二维纳米石墨烯作为添加剂提高传动油的耐磨性能和承载性能,满足重载高速工况下传动油在传递运动形式和能量过程中承载和耐磨性能需求。方法二维纳米石墨烯作为传动油添加剂,以丁二酰亚胺为分散剂制备了石墨烯传动油,采用FZG齿轮试验机标准方法(NB/SH/T 0306—2013)评价了传动油和石墨烯传动油的耐磨性能和承载性能,通过SEM、Raman、EDS和XPS检测手段分析试验齿轮耐磨及承载机理。结果二维纳米石墨烯作为添加剂将传动油的承载能力从8级提升至10级。试验齿轮在传动油中表现为黏着磨损和磨粒磨损,齿轮磨损表面有严重的犁沟现象;试验齿轮在石墨烯传动油中磨损表面表现为抛光式的磨损,磨损表面变得光滑。通过Raman、元素面分布和XPS测试结果分析,重载高速运转条件下试验齿轮磨损表面在石墨烯传动油中形成了不连续的多元杂化润滑膜,该润滑膜是由低剪切强度相(石墨烯、硫化物)、硬度和屈服强度比较高的磨损微粒(铁氧化物)和弹性模量较低的无定形聚磷酸盐等组成。润滑膜防止了齿轮材料在高载运转过程直接接触,减小接触面间的剪切强度,提高了耐磨性能和承载能力。结论二维纳米石墨烯作为一种传动油添加剂,可以有效提高齿轮传动系统的承载能力,弥补齿轮材料力学性能不足的问题,延长传动齿轮的使用寿命。
Transmission oil is the lubricating medium of gear drive systems,which not only plays a crucial role in energy transfer but also is required to meet other performance requirements,such as bearing,wear resistance,and corrosion resistance.Today,with the development of modern industrial technology,gear drive systems are operating in more severe conditions including heavy loads,high speed,high temperature and harsh environments.The traditional transmission oil has not been able to match the new requirements of wear resistance and carrying capacity.Adding nano-additive is a feasible strategy to improve the performance of lubricants.Accordingly,in this work,two-dimensional graphene nanosheet was selected to enhance the performance of traditional transmission oil in the gear drive system.Graphene nanosheet of 0.02wt.%was added to transmission oil to produce a graphene transmission oil,with 1.0wt.%succinimide as the dispersant.The gear test machine(FZG,Model:9000)was used to evaluate the wear resistance and load-bearing capacity of transmission oil and graphene transmission oil.In the test,20MnCr5 alloy steel gears with sixteen teeth and twenty-four teeth were used as the test gear and the drive gear,respectively.The oil level in gear box exceeded two-thirds of the gear centerline in each test.The contact stress of gears was changed by hanging weights,corresponding to the stress increase from one to twelve levels.After 15 min of test for each stress level,the gear surfaces were observed by vision to evaluate the failure level.SEM was used to characterize the gear wear morphology.EDS and Raman spectroscopy were employed to identify the chemical composition of tribofilms formed on the gear surface.X-ray photoelectron spectroscopy was obtained to further investigate the element chemical states in tribofilms.Results showed that two-dimensional graphene nanosheet as additive can increase the load-carrying capacity of transmission oil from level eight to level ten.Under the lubrication of transmission oil,the wear surface of t
作者
李东山
孔宁
张清东
曹学乾
鲁志斌
万晓娜
林博
LI Dong-shan;KONG Ning;ZHANG Qing-dong;CAO Xue-qian;LU Zhi-bin;WAN Xiao-na;LIN Bo(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemicals Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Guangxi Liugong Machinery Co.,Ltd.,Guangxi Liuzhou 545000,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2023年第3期151-160,共10页
Surface Technology
基金
甘肃省科技基金(21JR7RA089)。
关键词
二维纳米石墨烯
FZG测试
刮伤
承载
杂化润滑膜
two-dimensional nano graphene additive
FZG test
scratch
load carrying
hybrid lubrication film
