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Method for rapidly measuring physical and chemical quality indexes of in-use lubricating oil

A quality index, lubricating oil technology, used in measuring devices, color/spectral property measurement, material analysis by optical means, etc., to save manpower and reduce costs

Inactive Publication Date: 2010-07-21
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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  • Method for rapidly measuring physical and chemical quality indexes of in-use lubricating oil
  • Method for rapidly measuring physical and chemical quality indexes of in-use lubricating oil
  • Method for rapidly measuring physical and chemical quality indexes of in-use lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] Example 1: Determination of the oil quality index of GL-5 80W / 90 gear oil in use

[0044] 1) The collection of lubricating oil in the oil sample training set

[0045] Collect 53 oil samples of GL-5 80W / 90 gear oil in use.

[0046] 2) Determination of the infrared spectrum decay index and physical and chemical quality index of lubricating oil, the measurement results are shown in Table 1 (due to the huge data, only the maximum value, minimum value and average value are listed in the table).

[0047]According to ASTM E 2412 method, determine the infrared spectrum decay index of oil in use. The instrument is a Tensor 27 infrared spectrometer with a spectral range of 550-4100cm -1 ; Transmission sample cell, the optical path is 0.1mm.

[0048] The physical and chemical quality indicators were determined according to standard methods.

[0049] Table 1

[0050]

[0051]

[0052] 3) Establish the relationship between physical and chemical quality indicators and infr...

example 2

[0062] Example 2: Determination of GL-5 85W / 90 gear oil in-use oil quality index

[0063] 1) Collect samples of lubricating oil in use

[0064] Collect GL-5 85W / 90 gear oil in-use oil samples, 25 pieces.

[0065] 2) Determination of the infrared spectrum decay index and physical and chemical quality index of lubricating oil, the measurement results are shown in Table 4 (due to the huge data, only the maximum value, minimum value and average value are listed in the table).

[0066] According to ASTM E 2412 method, determine the infrared spectrum decay index of oil in use. The instrument is a Tensor 27 infrared spectrometer with a spectral range of 550-4100cm -1 ; Transmission sample cell, the optical path is 0.1mm.

[0067] The physical and chemical quality indicators were determined according to standard methods.

[0068] Table 4

[0069]

[0070] 3) Establish the relationship between physical and chemical quality indicators and infrared spectral decay indicators

[0...

example 3

[0078] Example 3: Determination of in-use oil quality index of CD 10W / 40 engine oil

[0079] 1) Collect samples of lubricating oil in use

[0080] Collect CD 10W / 40 engine oil in-use oil samples, 52 pieces.

[0081] 2) Determination of the infrared spectrum decay index and physical and chemical quality index of lubricating oil, the measurement results are shown in Table 7 (due to the huge data, only the maximum value, minimum value and average value are listed in the table).

[0082] According to ASTM E 2412 method, determine the infrared spectrum decay index of oil in use. The instrument is a Tensor 27 infrared spectrometer with a spectral range of 550-4100cm -1 ; Transmission sample cell, the optical path is 0.1mm.

[0083] The physical and chemical quality indicators were determined according to standard methods.

[0084] Table 7

[0085]

[0086] 3) Establish the relationship between physical and chemical quality indicators and infrared spectral decay indicators

...

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Abstract

The invention discloses a method for rapidly measuring physical and chemical quality indexes of in-use lubricating oil, which comprises the following steps: in a first step, collecting representative samples as a training set; in a second step, measuring an infrared spectrum decay index of the in-use lubricating oil; in a third step, measuring in-use oil physical and chemical quality indexes; in a fourth step, adopting a gradual linear regression method to carry out optimization on the infrared spectrum decay index and establishing a multiple linear regression equation of the physical and chemical indexes and the infrared spectrum decay index; and in a fifth step, for an in-use oil sample, firstly measuring the infrared spectrum decay index and then utilizing the regression equation established in the fourth step to calculate the physical and chemical quality indexes. The method of the invention can rapidly measure seven physical and chemical quality indexes of the in-use lubricating oil, i.e. a kinematic viscosity at the temperature of 40 DEG C, a kinematic viscosity at the temperature of 100 DEG C, water content, a total acid number (TAN), a total base number (TBN), a flash point and a pour point, monitor the quality decay of the lubricating oil, guide to change the oil and guarantee the normal operation of the engine.

Description

technical field [0001] The invention relates to a method for quickly measuring the physical and chemical quality indicators of lubricating oil in use, in particular, it relates to a method for rapidly measuring the infrared spectrum decay indicators of in-use oil by using infrared spectroscopy, and then using the physical and chemical quality indicators of the oil in use and the infrared spectrum decay The relationship between indicators, a method for quickly determining the quality indicators of lubricating oil in use. Background technique [0002] In actual use, under the conditions of high temperature, high-speed friction, and high-pressure metal contact inside the engine, the lubricating oil will undergo oxidation, degradation, shearing, etc., as well as 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 ...

Claims

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Application Information

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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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