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New lubrication oil quality spectrum rapid determination method

A rapid determination and lubricating oil technology, applied in the direction of color/spectral characteristic measurement, measurement device, material analysis through optical means, etc., to achieve the effect of improving monitoring ability, multiple parameters, and fast analysis speed

Inactive Publication Date: 2010-07-14
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

At present, there is no report on the use of mid-infrared spectroscopy to quickly detect the chemical composition, element content, flash point, pour point and other quality indicators of lubricating oil at the same time.

Method used

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  • New lubrication oil quality spectrum rapid determination method
  • New lubrication oil quality spectrum rapid determination method
  • New lubrication oil quality spectrum rapid determination method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0059] Example 1: Establishment and investigation of the regression equation for the determination of lubricating oil chemical composition by transmission method

[0060] 1) Collect training set samples

[0061] 125 lubricating oil samples were collected, including 86 internal combustion engine oils, 26 hydraulic oils, and 13 gear oils, whose manufacturers include Shell, ESSO, Mobil, MOBIL, Great Wall and Kunlun, etc.

[0062] 2) Determining the infrared spectrum and various quality indicators of the lubricating oil sample;

[0063] Use the Tensor 27 mid-infrared spectrometer to measure the infrared spectrum of the above lubricating oil, the spectral range: 550-4100cm -1 . Transmission sample cell, the optical path is 0.1mm. For the measured infrared spectrum, please see figure 1 .

[0064] Table 1 lists the units, standard methods, reproducibility requirements and repeatability requirements of each quality parameter. The quality indexes of various lubricating oils are s...

example 2

[0078] Example 2: Investigation on the accuracy of other quality indicators of lubricating oil measured by transmission method

[0079] 1) Collect training set

[0080] The training set is the same as in Example 1.

[0081] 2) measure the infrared spectrum and every quality index of lubricating oil, and measuring method and result are identical with embodiment 1.

[0082] 3) Evaluate the performance of the multiple linear regression equation

[0083] According to the steps of Example 1, the regression equations of each physical and chemical quality index were established. The preferred characteristic wavelengths of each physical and chemical quality index are shown in Table 5, and k is calculated according to the physical and chemical quality indexes measured at the characteristic wavelength i And b value, establish the regression equation of each physical and chemical quality index. Then take the training set as the unknown sample, use the established equation to measure ...

example 3

[0093] Example 3: Investigation on the Accuracy of Lubricating Oil Quality Index Determination by ATR Method

[0094] 1) Collection of training set

[0095] The training set is the same as in Example 1.

[0096] 2) Determination of infrared spectrum and various quality indicators of lubricating oil

[0097] Use the Tensor 27 mid-infrared spectrometer to measure the infrared spectrum of the above lubricating oil, the spectral range: 550-4100cm -1 . ATR sample cell, reflect 10 times. Each quality index measuring method and result are identical with embodiment 1.

[0098] 3) Evaluate the performance of the multiple linear regression equation

[0099] According to the steps of Example 1, the regression equations of each physical and chemical quality index were established. Then take the training set as the unknown sample, use the established equation to measure its physical and chemical quality index, and compare with the real value, calculate the correlation coefficient R a...

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Abstract

The invention discloses a new lubrication oil quality spectrum rapid determination method, which comprises the following steps: (1) collecting representative lubrication oil samples as a training set; (2) determining the infrared spectrum of the training set sample; (3) selecting an appropriate variable optimum technique to preferably select appropriate characteristic wavelengths and establishinglinear regression equation between each quality index and the characteristic wavelength by taking the absorbance of the characteristic wavelength as a variable; and (4) firstly determining the infrared spectrum of an unknown lubrication oil sample for quality test, selecting the absorbance of the same characteristic wavelength and determining each quality index of the lubrication oil by the established linear regression equation. The method can rapidly determine the chemical composition content, physical and chemical properties and 21 quality parameters of major elements and additive elements, the analysis speed is high, the operation is simple, and the quality monitoring capability of the lubrication oil is improved.

Description

technical field [0001] The present invention relates to a method for quickly measuring the new oil quality spectrum of lubricating oil, in particular to a method for quickly detecting the chemical composition content, physical and chemical properties, main elements and additive elements of lubricating oil through mid-infrared spectrum combined with variable optimization technology. method for quality parameters. Background technique [0002] Lubricating oil is the blood of equipment, and its quality is closely related to the performance of the equipment. Users need to monitor its quality from time to time to detect problems early and avoid using unqualified lubricating oil, which will cause the equipment to malfunction. In the actual use process, the method specified by the lubricating oil product is often used to analyze the quality of the lubricating oil one by one. The analysis cycle is long, and it takes at least two weeks for an analyst to complete the chemical composi...

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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