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Infrared Spectroscopy On-line Testing Method of Lubricating Oil High Temperature Friction Process

An infrared spectrum and online testing technology, which is applied in the field of infrared spectrum online testing, can solve problems such as the inability to continuously detect the structural changes of lubricating oil online, and the inability to collect online infrared spectrum dynamic data of lubricating oil, so as to achieve online infrared spectrum testing and ensure reliability. Sex, the effect of eliminating interference fringes

Active Publication Date: 2020-05-22
WUHAN RES INST OF MATERIALS PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the infrared spectrum testing method of lubricating oil is mainly to remove the oil sample for spectral data collection after the friction test is over, and it is impossible to collect the infrared spectral dynamic data of the structure change of the lubricating oil online during the tribological data testing process
In order to break through the bottleneck of the inability to continuously detect the structural changes of lubricating oil in the process of lubricating oil tribological performance testing, research and development of infrared spectroscopy online testing technology for lubricating oil high-temperature friction process

Method used

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  • Infrared Spectroscopy On-line Testing Method of Lubricating Oil High Temperature Friction Process
  • Infrared Spectroscopy On-line Testing Method of Lubricating Oil High Temperature Friction Process
  • Infrared Spectroscopy On-line Testing Method of Lubricating Oil High Temperature Friction Process

Examples

Experimental program
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Effect test

example example 1

[0048] 500SN+1.0wt% T558 Infrared spectrum online test during high temperature friction process:

[0049] The N-H absorption peaks of the 500SN+1.0wt%T558 oil sample under room temperature friction-free conditions and high-temperature friction conditions are shown in Figure 5. After normalization, the N-H peak intensity of the 500SN+1.0wt%T558 oil sample changes with the collection time as Image 6 As shown, the N-H peak intensity of the high-temperature friction condition is subtracted from the instrument test background of the room temperature friction-free condition, and the N-H peak intensity of the 500SN+1.0wt% T558 oil sample correction under the high-temperature friction condition is changed with the collection time ( Figure 7 ). The flow rate of the 500SN+1.0wt% T558 oil sample was measured to be 0.9mL / min, and the lag time of the oil sample was calculated to be 9.8min. After deducting the lag time, the N-H peak intensity and friction time of 500SN+1.0wt% T558 in the ...

example example 2

[0052] PAO+1.0wt% T558 Infrared spectrum online test of high temperature friction process:

[0053] The N-H absorption peaks of PAO+1.0wt%T558 oil samples under room temperature friction-free conditions and high-temperature friction conditions are shown in Figure 11. After normalization, the N-H peak intensity of PAO+1.0wt%T558 oil samples changes with the collection time as Figure 12 As shown, the N-H peak intensity of the high-temperature friction condition is subtracted from the instrument test background of the room temperature friction-free condition, and the N-H peak intensity of the PAO+1.0wt% T558 oil sample correction under the high-temperature friction condition is obtained as a function of the collection time ( Figure 13 ). The measured flow rate of PAO+1.0wt%T558 is 2.0mL / min, and the lag time of the oil sample is calculated to be 4.4min. After deducting the lag time, the relationship between the N-H peak intensity and the friction time of PAO+1.0wt%T558 is obtai...

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Abstract

The invention discloses an infrared spectroscopy on-line test method of lubricating oil in a high-temperature friction process and belongs to the field of lubricating oil spectral analysis. The method realizes an infrared spectroscopy on-line test on lubricating oil in a high-temperature friction process through construction of an infrared spectroscopy on-line test device. An original liquid tank is transformed into a liquid communication tank, Teflon pipes and silicone hoses are used as pipes, a peristaltic pump realizes circulation flowing of lubricating oil in an oil box-to-liquid communication tank-to-oil box way, an inclined angle adjustment device of the liquid communication tank is designed and eliminates interference fringe in the infrared spectroscopy test, an infrared spectrometer is fully preheated so that the outer environment humidity is stable in the test, after the infrared spectrum of the air background is scanned, the peristaltic pump is started, after the lubricating oil passes through the liquid communication tank, the infrared spectrum is collected, and simultaneously, a friction test machine is started to test the friction coefficient of the lubricating oil.

Description

technical field [0001] The invention discloses an infrared spectrum online testing method for lubricating oil high-temperature friction process, belonging to the field of lubricating oil spectral analysis. Background technique [0002] The chemical structure change of lubricating oil under high-temperature friction conditions is an important reason affecting its tribological properties. High thermal oxidation performance is an important prerequisite for lubricating oil to perform efficient lubrication. Among them, antioxidant additives play a key role in improving the high-temperature thermal oxidation performance of lubricating oil. effect. During the high-temperature friction process, the consumption of antioxidants and the accumulation of oxidation products have a significant impact on the lubricating properties of oils. The study of the structural changes of lubricating oils and the action of antioxidants can provide guidance for the mechanism analysis of the decay of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3577
CPCG01N21/3577
Inventor 李健金永亮贾丹白新明程冰雪段海涛魏雷
Owner WUHAN RES INST OF MATERIALS PROTECTION
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