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Quick detection method of oil quality spectrum for lubricating oil

A lubricating oil and quality technology, applied in the direction of color/spectral characteristic measurement, measuring device, and material analysis through optical means, to achieve the effect of easy operation, improved monitoring ability, and fast analysis speed

Inactive Publication Date: 2013-02-20
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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  • Quick detection method of oil quality spectrum for lubricating oil
  • Quick detection method of oil quality spectrum for lubricating oil
  • Quick detection method of oil quality spectrum for lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046] Example 1: Establishment and investigation of vehicle engine oil in-use oil quality parameter regression equation

[0047] 1) Collection of oil sample training set

[0048] Collect 88 vehicle engine oil samples, including 29 samples of CD 10W / 40 engine oil and 59 samples of CD 15W / 40 engine oil.

[0049] 2) Determination of infrared spectrum of lubricating oil

[0050] 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. The measured infrared spectrum is shown in figure 2 .

[0051] 3) Determination of quality parameters of lubricating oil samples by industry standard methods

[0052] Table 1 lists the units, standard methods, reproducibility requirements and repeatability requirements of each quality parameter.

[0053] Table 1

[0054] nature

[0055] See the property range column in Table 3 for the range of measured values ​​of each...

example 2

[0065] Example 2: Investigation on the Accuracy of In-use Oil Quality Index of Vehicle Gear Oil by ATR Method

[0066] 1) Collect in-use oil samples

[0067] 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.

[0068] 2) Determination of infrared spectrum of lubricating oil

[0069] 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. The measured infrared spectrum is shown in image 3 .

[0070] 3) Use the standard method in Table 1 to measure the quality parameters of the lubricating oil samples, and see the property range column in Table 5 for the range of each quality index of the training set samples.

[0071] 4) Use the stepwise linear regression method to optimize the characteristic wavelength, see Table 4.

[0072] Table 4 ...

example 3

[0078] Example 3: Investigation on the accuracy of in-use oil quality indicators of aero engine oil by ATR method

[0079] 1) Collected in the training set of oil samples

[0080] Collected 426 in-use samples of aero-engine oil, including 99 in-use samples of 926 aero-engine oil and 327 in-use samples of Pegasus-2 aero-engine oil.

[0081] 2) Determination of infrared spectrum of lubricating oil

[0082] 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. The measured infrared spectrum is shown in Figure 10 .

[0083] 3) Use the standard method in Table 1 to measure the quality parameters of the lubricating oil samples, and see the property range column in Table 7 for the range of each quality index of the training set samples.

[0084] 4) Use the stepwise linear regression method to optimize the characteristic wavelength, see Table 6

[0...

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Abstract

The invention discloses a quick detection method of oil quality spectrum for lubricating oil, comprising the following steps: 1, collecting a lubricating oil sample with representativeness as a training set; 2, measuring the infrared spectrum of the training set sample; 3, measuring the quality index of the training set sample; 4, selecting a proper variable preference technology, preferably selecting a proper characteristic wavelength, taking the absorbance of the characteristic wavelength as a variable, and building the linear regression equation of each quality index and absorbance; 5, for the quality detection of unknown lubricating oil samples, firstly measuring the infrared spectrum thereof, selecting the absorbance of wavelength with the same characteristic, and measuring each quality index of lubricating oil by the built liner regression equation. The invention quickly measures seven quality parameters, such as oil water content, total acid number, total base number, 40 DEG C viscosity, 100 DEG C viscosity, flash point, pour point and the like of lubricating oil and monitors lubricating oil quality. The quick detection method has high analysis speed and simple operation and greatly improves lubricating oil quality monitoring capability.

Description

technical field [0001] The present invention relates to a method for rapid detection of new oil quality spectrum of engine lubricating oil, in particular to a method for rapid detection of in-use oil and water content, total acid value, total base value, 40 ℃ viscosity, 100 ℃ viscosity, flash point and pour point and other 7 quality parameters. 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 reaso...

Claims

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Application Information

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Patent Type & Authority Patents(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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