摘要
为解决机械设备在恶劣工况下由润滑失效而导致的设备故障甚至安全生产事故问题,进一步提升机械设备的运行稳定性和安全性,研究纳米硼酸钙(CaB)和二烷基二硫代磷酸钼(MoDDP)单一润滑油添加剂和复合润滑油添加剂的减摩抗磨效果,并探究其润滑作用机制。研究结果表明,重载、变速、冲击工况条件下1.5 wt.%MoDDP/3.0 wt.%CaB复合润滑油添加剂具有良好的减摩抗磨效果,与基础油相比,在不同转速下可最大降低65.1%的摩擦因数和80%的磨痕深度,施加50 N冲击载荷时,可分别降低66.7%的摩擦因数和76.5%的磨痕深度。MoDDP/CaB复合润滑油添加剂在润滑过程中能生成包含C-C、Fe_(2)O_(3)、FeB和MoS_(2)的金属化合物层,添加剂中的CaB和MoDDP能够相互促进彼此反应,增加FeB/MoS_(2)润滑膜的生成量,对比单一的添加剂和基础油,复合添加剂具有更好的自修复性能和协同功效,形成具有高承载力的润滑油膜,提高了复合润滑油的抗磨减摩性能。MoDDP/CaB复合润滑油添加剂的制备可以充分综合利用抗氧化剂与极压耐磨剂的稳定、优异润滑特性,研究结果可为复合添加剂的广泛应用提供数据支持和理论支撑。
To solve the problem of equipment failure and even safety production accidents caused by lubrication failure under adverse working conditions,and to further enhance the stability and safety of mechanical equipment operation,the anti-wear and friction reduction effect of single and composite lubricant additives of calcium borate(CaB)and molybdenum dialkyl dithiophosphate(MoDDP)under heavy load,variable speed,and impact conditions were investigated.The results show that the organic molybdenum additives can effectively reduce the friction factor and wear spot diameter compared with the base oil.The 1.5 wt.%MoDDP additive exhibited the best friction reduction and anti-wear performance,reducing the friction factor by 41.0%and the wear spot diameter by 48.9%compared to the base oil.Among the four oil samples,the 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant additive showed the best friction and anti-wear effects,reducing the friction factor by 55.0%,62.7%,and 65.1%and the wear spot depth by 75.8%,78.8%,and 80.0%,respectively,compared with the base oil at different rotation speeds.With the increase of rotation speed,the friction factor curves of base oil,2.0 wt.%CaB,and 1.5 wt.%MoDDP fluctuated and the maximum wear spot depth of base oil,2.0 wt.%CaB,and 1.5 wt.%MoDDP also tended to increase with the rotation speed,while the friction factor curves of 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant were always the most stable.The surface wear spots of the specimens lubricated by 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant at different rotation speeds were uniform,and no significant changes in the wear spot depth were observed,indicating that the rotation speed under heavy load has a slight effect on the friction reduction performance of 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant.The composite lubricant additives exhibited stable and excellent friction reduction and anti-wear performance under heavy loads and variable-speed operating conditions.Under a 50 N impact load,the 1.5 wt.%MoDDP/3.0 wt.%CaB additive showed the best friction reduction effect,reducing the friction factor by 66.7%.The typical friction factor curves of 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant exhibited the least fluctuation.The 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant additive exhibited the smallest wear spot depth and the smallest increase in depth of wear spot under a 50 N impact load,which can reduce the wear spot depth by 76.5%compared to the base oil.The comparisons of wear spot depth and morphology show that the 1.5 wt.%MoDDP/3.0 wt.%CaB composite lubricant can play an excellent anti-wear effect under low speed,heavy load,and impact conditions.The MoDDP/CaB composite lubricant additives can generate a metal composite layer containing C-C,Fe_(2)O_(3),FeB,and MoS_(2)during the lubrication process.The CaB and MoDDP in the composite lubricant additive can promote each other's reactions and increase the generation of FeB/MoS_(2)lubricating films.Compared to a single additive and base oil,the composite lubricant additives showed better self-healing performance and synergistic efficacy,forming a lubricating film with a high load-bearing capacity and improving the anti-wear and friction reduction performance of the composite lubricant.The preparation of MoDDP/CaB composite lubricant additives can fully synthesize the stable and excellent lubricating properties of antioxidants,extreme pressure,and wear agents,and the results can provide data and theoretical support for the wide application of composite lubricant additives.
作者
王小勇
张慧峰
郭佳毫
姜宇
姜雨辰
WANG Xiaoyong;ZHANG Huifeng;GUO Jiahao;JIANG Yu;JIANG Yuchen(Shaanxi Xiaobaodang Mining Co.,Ltd.,Yulin 719000,China;China Coal Technology and Engineering Group Robot Technology Co.,Ltd.,Shenzhen 518052,China;School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,China)
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2024年第2期248-259,共12页
China Surface Engineering
基金
江苏省高校优势学科建设工程项目。
关键词
MoDDP/CaB复合润滑油添加剂
减摩抗磨
变速、重载、冲击
MoDDP/CaB composite lubricant additives
friction reduction and anti-wear performance
variable speed,heavy load,and impact
