MoDTC增强型磁性液体减摩性能试验研究  

Effect of MoDTC on the Lubrication Properties of Magnetic Fluids

作　　者：何帅 王建梅[1] 王军[1] 张芳萍[1] HE Shuai;WANG Jianmei;WANG Jun;ZHANG Fangping(Engineering Research Center Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原科技大学重型机械教育部工程研究中心,山西太原030024

出　　处：《润滑与密封》2023年第7期81-85,共5页Lubrication Engineering

基　　金：国家自然科学基金项目(51875382)。

摘　　要：为提高磁性液体的减摩性能,在现有Fe 3O 4磁性液体的基础上,通过微量添加二烷基二硫代氨基甲酸钼(MoDTC),制备一种MoDTC增强型磁性液体。对MoDTC增强型磁性液体微观粒子的结构、组成成分、磁性能进行测试分析,在不同载荷、速度条件下进行摩擦磨损试验,探究MoDTC含量对磁性液体摩擦磨损性能的影响。实验结果表明:MoDTC增强型磁性液体比铁磁性液体饱和磁化强度小,且剩磁几乎为0,具有较好的磁性能;在试验研究范围内,Fe 3O 4磁性液体润滑下的摩擦因数比油润滑低,MoDTC增强型磁性液体的摩擦因数低于Fe 3O 4磁性液体的摩擦因数,且MoDTC质量分数为6%时减摩效果较佳;当载荷在25~45 N范围内,MoDTC增强型磁性液体的摩擦因数先随载荷增大而减小,超过临界值30 N后,摩擦因数随载荷增大而增大。研究结果表明,磁性液体中加入适量的MoDTC具有较好的减摩性能,能在一定程度上改善磁性液体的润滑性能。In order to improve the friction reducing performance of magnetic fluids,based on the existing Fe 3O 4 magnetic liquid,molybdenum dialkyl dithiocarbamate(MoDTC)enhanced magnetic liquid was prepared by adding MoDTC in small quantities.The structure,composition and magnetic properties of the microscopic particles of MoDTC magnetic liquid were tested and analyzed,and the friction and wear experiments of different pressure and speed conditions were carried out on to explore the effect of MoDTC content on the friction and wear properties of magnetic fluids.The results show that the saturation magnetization intensity of the prepared MoDTC enhanced magnetic liquid is smaller than that of ferromagnetic liquid,and the residual magnetism is almost zero,which has good magnetic performance.Within the scope of experimental research,the friction coefficient of Fe 3O 4 magnetic liquid lubrication is lower than that of oil lubrication,and the friction coefficient of MoDTC enhanced magnetic liquid is lower than that of Fe 3O 4 magnetic liquid.The friction reduction effect is better when the MoDTC mass fraction is 6%.When the load is in the range from 25 N to 45 N,the friction coefficient of MoDTC enhanced magnetic liquid decreases with the load increasing,and after exceeding the critical value of 30 N,the friction coefficient increases with the load increasing.The above research conclusion shows that the addition of an appropriate amount of MoDTC to the magnetic liquid has excellent friction reduction properties and can improve the lubrication performance of the magnetic liquid to a certain extent.

关 键 词：磁性液体 MODTC 磁饱和强度 剩磁 摩擦因数 

分 类 号：TH117.1[机械工程—机械设计及理论] TQ586.1[化学工程—精细化工]