机油品质异常监测

Inspection for Abnormal Quality of Lubrication Oil

对某重型柴油机机油在使用过程中异常进入柴油、冷却液、被氧化和被污染的情况进行模拟实验。分别取不同体积百分比的柴油、冷却液、乙酸均匀混入纯净的机油中,使用油品传感器对混合后的机油测量其粘度、密度、介电常数和温度。测试结果表明:柴油稀释机油使得机油的粘度、闪电降低;冷却液稀释机油使得机油的介电常数、粘度增大,密度基本不变;机油被氧化使得机油的粘度增大,介电常数减小,密度基本不变。通过机油品质可监测柴油机润滑系统的技术状况,为实车机油的在线监测提供参考和按质换油提供手段。

This paper experimentalizes about unexpected leaking of diesel, coolant and lubrication oil oxidized and polluted in lubricant syslem of a heavy diesel engine. Lubricant oil sensor measures dynamic viscosity, density, dielectric constant and temperature of the mixed lubricant oil when diesel, coolant and acetic acid are taken separately in different proportions. The results reveal that： dynamic viscosity and flash point of lubricant oil decrease when diluted by diesel; the dielectric constant and dynamic viscosity of lubricant oil increase and density keeps fixedness when diluted by coolant; oxidized lubricant oil has the increasing dynamic viscosity and decreasing dielectric constant but density keeps fixedness. The inspection for exceptional quality of lubricant oil can reflect technical status of lubricant system and provide reference as well as instrument with real vehicle inspecting online and exchanging lubricant oil.