ISSN   1004-0595

CN  62-1224/O4

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银吡唑甲基吡啶配合物复合润滑油添加剂的高温摩擦学性能研究与曲线拟合

High Temperature Tribological Properties and Curve Fitting of Silver Pyrazole Methylpyridine Complex as Lubricating Oil Additive

  • 摘要: 针对高温下润滑油性能突变失效问题,为实现一定温度范围内润滑材料的持续润滑,本文作者开展了突变工况自适应的润滑添加剂设计方法研究,制备了系列润滑机理相同而理化特性不同的高温自适应银吡唑甲基吡啶配合物,设计了适应即时润滑状态的添加剂配比策略,利用四球摩擦磨损试验机研究复合润滑油添加剂的减摩抗磨性能,研究结果表明,与仅含单个配合物的润滑油相比,配比后的润滑油稳定性能更好,能够在不同的温度下持续分解输送银微粒,保证在宽温度范围内的持续低摩擦,具有更优异的自修复能力与润滑性能. 通过多种表征手段对其磨损机理进行分析,发现在配合物1的层状结构与配合物2的小尺寸效应的影响下,配合物3在摩擦过程中对接触表面的磨损能够得到有效抑制,表明配合物3与配合物1、2之间存在良好的抗磨协同效应,配合物1、2之间在范德华力的作用下并没有发挥理想的润滑效果. 基于系列含银配合物的热重分析结果,通过拟合复合润滑油添加剂的摩擦系数与温度的关系曲线,推导出含银系列配合物的配比方程,并通过Matlab对经验公式提出修正,确定了复合润滑油添加剂的最佳配比为1.0:1.0:0.5,掌握了在持续升温过程中配合物在润滑油中的分解效率,进一步证明了配比后的润滑油银释放效率提升,更适宜用作突变工况下的后备润滑油添加剂. 研究结果可为后续润滑油释放润滑材料的润滑效果调控方法设计提供数据支撑和理论指导.

     

    Abstract: In response to the problem of sudden failure in the high-temperature lubrication performance of lubricating oil, in order to achieve continuous lubrication of lubricating materials within a certain temperature range, a study on the design method of adaptive lubrication additives for sudden changes in operating conditions is carried out. This study prepared a series of silver pyrazole methyl pyridine complexes with the same lubrication mechanism but different physicochemical properties that decompose and release silver particles at high temperatures. A lubricating oil additive ratio strategy suitable for real-time lubrication was designed. The friction and wear resistance of composite lubricating oil additives containing silver complexes were studied using a four ball friction and wear tester. The research results showed that compared with lubricating oil additives containing only a single complex, The formulated lubricating oil has better stability and can continuously decompose and transport silver particles at different temperatures, ensuring continuous low friction of the contact surface over a wide temperature range, with better self-healing ability and lubrication performance. Through various characterization methods to analyze the wear mechanism of the experimental results, it was found that under the influence of the layered structure of complex 1 and the small size effect of complex 2, the negative impact of complex 3 on the wear of the contact surface during the friction process can be effectively suppressed. Therefore, there is a good synergistic effect of wear resistance between complex 3 and complexes 1, 2. However, compared to lubricants containing only a single complex 1, 2, the expected lubrication effect between complexes 1 and 2 did not occur due to the influence of van der Waals forces. Based on the thermogravimetric analysis results of a series of silver containing complexes, the formula equation of silver containing series complexes was derived by fitting the relationship curve between the friction coefficient and temperature of composite lubricant additives, and the empirical formula was modified by Matlab. It was found that the appropriate ratio and addition amount were the key factors affecting the anti-wear and antifriction performance of lubricant additives. The optimal ratio of composite lubricant additives was determined to be 1.0:1.0:0.5, We have mastered the decomposition efficiency of the complex in lubricating oil after being proportioned during the continuous heating process, further proving that the silver release efficiency of the proportioned lubricating oil increases, making it more suitable as a backup lubricating oil additive under sudden operating conditions. The research results can provide data support and theoretical guidance for the subsequent design of lubricating effect control methods of lubricant release materials.

     

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