基于可见-近红外光谱技术的润滑油酸值无损检测方法研究

研究了基于可见-近红外光谱技术的润滑油酸值无损检测方法.获得了润滑油在475～975 nm范围内的可见-近红外光谱.采用最小二乘支持向量机(LS-SVM)建立可见-近红外光谱检测模型,并通过将无信息变量消除算法(UVE)与连续投影算法(SPA)相结合进行光谱有效波长选取.通过UVE-SPA法进行变量选择计算,最终将原始...     

1,3,4-噻二唑衍生物的合成及其抗腐减摩性能

以2-巯基-5-甲基-1,3,4-噻二唑为原料,经分子设计合成了一种新型噻二唑衍生物2-苄基巯基-5-甲基-1,3,4-噻二唑(简称TM),利用FTIR、元素分析、液相色谱和质谱等手段对产物的结构进行了表征,确定了合成产物为目标产物TM,且纯度大于90.0%。采用热重分析测试了TM的热稳定性,TM热分解温度为232℃,具有较好的热稳定性;腐蚀性实验结果表明,TM具有较好的抗腐蚀性。将TM作为多功能润滑油添加剂添加到基础油中,利用四球摩擦磨损试验机考察了TM的摩擦学性能。实验结果表明,TM具有良好的抗磨减摩性能,当添加量为0.6%(w)时,抗磨减摩效果最佳;在较宽载荷范围(100～500 N)内,添加0.6%(w)TM的加剂油的摩擦系数和钢球的磨斑直径较基础油均有较好的改善。     

脉冲调合对润滑油产品质量的影响

文章分析了脉冲调合对内燃机油、液压油产品质量的影响。脉冲调合生产内燃机油时不会像传统机械搅拌那样对油品黏度有剪切作用,相反对产品质量有一定的保障;脉冲调合生产液压油时需要严格控制原材料水分含量,同时处理好罐底存油,否则在脉冲压缩风的强大搅拌作用下极易出现抗乳化不合格情况,对于抗乳化不合格的液压油提出一些处置措施。     

A Fuel Economy Study in Heavy Duty Diesel Engine Lubricants

Internal combustion engines′ fuel economy is an important role for engine designers,engine manufacturers over the past 30 years,especially passenger car motor oils.In heavy duty diesel engine,over the past 20 years,fuel economy has in some cases been sacrificed for exhaust gas emission optimizations.Now,Heavy Duty Automotive and the related industries have strong interest in fuel economy and the lubricants.It is driven by competitive market forces as well as government mandates and new emission regulations.Japan was the first country in the world to establish and implement heavy duty trucks and buses fuel economy standards.Other countries also have followed either by establishing direct fuel economy standards or greenhouse gas(GHG) emissions standards which are directly tied to fuel economy.This paper is discussing that heavy duty diesel engine lubricants can contribute on fuel economy.The contribution of various aspects of engine oil formulations on fuel economy will be discussed such as lubricant viscosity grade,lubricant additives and friction modifiers.In this paper,the evaluation discussions are based on fuel economy measurements in some bench tests,standardized laboratory engine tests and field tests.     

Orifice compensated multirecess hydrostatic/hybrid journal bearing system of various geometric shapes of recess operating with micropolar lubricant

The objective of the present paper is to study analytically the performance of four-pocket orifice compensated hydrostatic/hybrid journal bearing system of various geometric shapes of recess operating with micropolar lubricant. The modified Reynolds equation for micropolar lubricant is solved using FEM and the Newton-Raphson method along with appropriate boundary conditions. The results suggest that the influence of micropolar effect of lubricant on bearing performance is predominantly affected by the geometric shape of recess and restrictor design parameter. Therefore, the bearing designer must judiciously choose an appropriate geometric shape of recess in order to get an overall enhanced bearing performance.     

绿色磨削加工技术研究现状及进展

传统的磨削加工大量采用磨削液浇注法降低加工区温度,磨削液的大量使用给环境和操作者健康带来了很大危害,而且增加了磨削液排放回收的成本.本文分析了绿色磨削加工技术,如干磨削技术、微量润滑、液氮冷却、低温气体冷却、高压射流冷却、内冷却和固体润滑冷却技术在机械制造中的应用及其技术特征.绿色磨削加工技术将逐渐取代传统的浇注供液方...     

基于双膜理论润滑油溶解制冷剂质量计算模型

针对已有压缩机润滑油溶解的制冷剂计算模型不能反应溶解的制冷剂动态释放问题,提出了一种基于双膜理论的溶解制冷剂动态释放速率模型。新的模型克服了已有模型的问题,将该模型和已有模型分别嵌入冰箱动态仿真模型,比较结果显示含有新的模型的冰箱动态仿真模型能反应冰箱开机压力运行趋势。     

船用柴油机润滑油状态在线监测技术的应用研究

对船用主柴油机进行了润滑油监测技术的研究与应用,在研究中制定了监测方案,选择了监测仪器,确定了取样窗口、取样间隔、取样工况、取样方法、特征元素及数据分析方法.在实施中,实船建立实验室,运用先进监测设备连续跟踪监测主要摩擦副的磨损状态,建立磨损趋势图,掌握磨损趋势及规律,探索了柴油机监测管理的新模式.     

基础油的性能检测及其在工业润滑油液中的应用技术

介绍浓硫酸显色法、加热法、烘干法、放置法、理化测试法、仪器分析法等6种基础油不同性能的常规测试法,并对基础油的应用技术进行讨论;指出在润滑油调配时尽量选用黏度中心值或范围接近的基础油,优先选用性能贡献率较大的基础油,新基础油和新型添加剂的合理配伍将是今后润滑油液调配的关键技术。     

船用燃气轮机润滑油

由于受海洋环境的影响,要求船用燃气轮机润滑油具有良好的抗腐蚀性能.英国和前苏联专门制定了舰船燃气轮机润滑油规范,而美国海军则是在航空燃气轮机润滑油中添加抗腐蚀剂来解决舰用燃气轮机润滑油的腐蚀问题.我国中粘度航空润滑油在船用燃气轮机上的成功应用为船用燃气轮机润滑油的研究和发展打下了良好的基础.