用近红外透射光谱快速检测内燃机润滑油性能

Rapid Determination of Lubricating Oil Performance by Near Infrared Radiation Reflection Spectroscopy

通过对内燃机曲轴箱润滑油近红外吸收光谱的分析 ,研究了润滑油近红外吸收光谱随发动机工作时间变化的规律 ,为快速分析发动机润滑油的性能提供了一种新颖、可靠的分析方法。试验使用 8个不同工作时间间隔的发动机润滑油样本 ,建立了润滑油的使用时间与近红外光谱之间的数学关系 。

The near infrared radiation reflection spectroscopy (NIRDRS) is a new analyzer. It is widely used in the field of analysis of mechanical oil, but there is a few reports about to determine the period of lubricating oil and the time to exchange the lubricating oil. The character of lubricating oil (CF15W/40) along with the time was analyzed by NIRDRS. The mathematical formulas between the used time of lubricating oil and NIRDRS were put forward. A similar linear relationship between the NIRDRS absorbance and the 8 samples oil content in different working time was observed. The two calibration equations were obtained on the basement of initial data, and the two multiple correlation coefficients were 0 997 and 0 999 respectively. Especially the average relative error was only 2 073%, the standard error was lower than 2 605.These results showed that NIRDRS can analyze the characters of lubricating oil quickly and determine the time of exchanging lubricating oil. It provided a new technical method to increase the efficiency and prolong the life of diesel engine.