In-use lubricating oil quality rapid testing method

A detection method and lubricating oil technology, applied in the direction of measuring device, color/spectral characteristic measurement, material analysis through optical means, etc., to achieve the effect of simple operation, low requirements for operators, and improved monitoring ability

Inactive Publication Date: 2010-08-18
PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the relationship between the infrared spectrum decay index and the physical and chemical quality index has not been clarified, this method has not yet been adopted by the lubricating oil change index standard

Method used

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  • In-use lubricating oil quality rapid testing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0054] Example 1: Determination of the quality of aviation engine oil in use by ATR method.

[0055] 1) Sample collection in the oil training set

[0056] 426 in-use samples of aero-engine oil were collected, including 99 samples of No. 926 aero-engine oil and 327 samples of No. 926 aero-engine oil.

[0057] 2) Determination of infrared spectrum of lubricating oil

[0058] Use Tensor 27 mid-infrared spectrometer to measure the infrared spectrum of the above lubricating oil, spectral range: 550-4100cm -1 . ATR reflection sample cell, reflection 10 times, please see the mid-infrared spectrum figure 1 .

[0059] 3) The quality index of the lubricating oil sample was measured by a standard method, and the measurement results are shown in Table 2.

[0060] Table 1 lists the units, standard methods, reproducibility requirements and repeatability requirements of each quality index. Due to the huge amount of data, Table 2 only lists the maximum value, minimum value and average v...

example 2

[0075] Example 2: Determination of vehicle engine oil in-use oil quality index by ATR method

[0076] 1) Collected in the training set of oil samples

[0077] Collect 88 vehicle engine oil samples, including 29 samples of CD 10W / 40 engine oil and 59 samples of CD15W / 40 engine oil.

[0078] 2) Determination of infrared spectrum of lubricating oil

[0079] Use Tensor 27 mid-infrared spectrometer to measure the infrared spectrum of the above lubricating oil, spectral range: 550-4100cm -1 . ATR sample cell, reflection 10 times.

[0080] 3) Adopt the method in Table 1 in Example 1 to measure the quality index of the lubricating oil sample. The measurement results are shown in Table 6. Because of the huge data, Table 6 only lists the maximum value, minimum value and average value of each quality index of the training set sample .

[0081] Table 6

[0082]

Sticky at 100°C

degrees, mm 2 / s

TBN,

mgKOH / g

TAN,

mgKOH / g

pour point,

℃

...

example 3

[0092] Example 3: Determination of vehicle gear oil in-use oil quality index by ATR method

[0093] 1) Collect in-use oil samples

[0094] Collect 97 samples of vehicle gear oil in use, including 29 samples of GL-580W / 90 gear oil, 38 samples of No. 18 hyperbolic gear oil, and 30 samples of GL-585W / 90 gear oil.

[0095] 2) Determination of infrared spectrum of lubricating oil

[0096] Use Tensor 27 mid-infrared spectrometer to measure the infrared spectrum of the above lubricating oil, spectral range: 550-4100cm -1 . ATR sample cell, reflection 10 times.

[0097] 3) Using the method in Table 1 in Example 1 to measure the quality indicators of the lubricating oil samples, Table 10 lists the maximum, minimum and average values ​​of each quality indicator of the training set samples.

[0098] Table 10

[0099]

Quality Index

Viscosity at 100°C

, mm 2 / s

TBN,

mgKOH / g

TAN,

mgKOH / g

pour point

,℃

Flash point

...

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Abstract

The invention relates to an in-use lubricating oil quality rapid testing method which comprises the following steps that: (1) a representative lubricating oil sample is collected as a training set; (2) the infrared spectrum of the training set lubricating oil sample is determined, corresponding pre-treatment is carried out, and the spectrum data after pre-treatment serves as a variable; (3) through a multivariate calibration method, the relationship model between the in-use lubricating oil quality index and the spectrum is built; and (4) for the quality testing of the lubricating oil sample to be tested, first the infrared spectrum is determined, and then pre-treatment which is the same with that of Step (2) is carried out, and the lubricating oil quality index is determined through the lubricating oil quality analysis model built in Step (3). The method of the invention can rapidly determine 7 quality indexes, i.e. the in-use lubricating oil water content, TAN, TBN, 40DEG C viscosity, 100DEG C viscosity, the flash point, the pour point and the like, and the lubricating oil quality is monitored. The in-use lubricating oil quality rapid testing method has high analysis speed, is convenient to operate, and greatly improves the lubricating oil quality monitoring capability.

Description

technical field [0001] The present invention relates to a method for quickly detecting the oil quality of lubricating oil in use in an engine, in particular to a method for rapidly detecting in-use lubricating oil water content, TAN, TBN, 40°C viscosity, 100 The method of 7 quality indicators such as ℃ viscosity, flash point and pour point. Background technique [0002] Lubricating oil is the blood of equipment, and its quality is closely related to the performance of the equipment. In actual use, under the conditions of high pressure, high temperature, high-speed friction, and metal contact inside the engine, the lubricating oil will undergo oxidation, degradation, shearing, and fuel pollution, resulting in a decline in the quality of the lubricating oil. The reduction of the quality of lubricating oil will seriously affect its performance, which will lead to a decrease in the working condition of the engine, which will seriously lead to engine failure. For this reason, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3577
Inventor 田高友易如娟褚小立
Owner PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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