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Method for determining thermal oxidation stability of lubricating oils of same label by chromatic change values

A lubricating oil, changing value technology, applied in the field of lubricating oil, can solve the problems of rapid identification of unfavorable lubricating oil quality, high price, cumbersome testing process, etc., and achieve the effect of accelerating the development and utilization process

Inactive Publication Date: 2013-07-03
LUOYANG BEARING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above five test methods must be completed with complex lubricating oil oxidation stability testing instruments, and the testing process is cumbersome, requiring expensive testing equipment, which is not conducive to the rapid identification of the quality of lubricating oil of the same brand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Thermal oxidation stability identification of L-AN46# total loss system oil produced by different manufacturers

[0021] L-AN46# total loss system oil is a base oil for the production of special lubricating oils. Choose base oils from three different manufacturers and mark them as 1#, 2# and 3#. Weigh 150g of each and pass the chromaticity test of petroleum products. The tester measures the original chromaticity value of 1#, 2# and 3# base oil respectively, pours 1#, 2# and 3# base oil into three 250ml beakers, and puts the three beakers in adjustable voltage Heat on a closed electric furnace, raise the temperature of 1#, 2# and 3# base oil to 150°C under constant stirring by the stirrer, heat for 40 minutes and cool to room temperature, and then use the petroleum product colorimeter to measure the corresponding The high temperature chromaticity value, the specific parameters are shown in the table below:

[0022] base oil 1# 2# 3# original chroma v...

Embodiment 2

[0029] Thermal Oxidation Stability Appraisal of Oil Used in L-AN100# Total Loss System from Different Manufacturers

[0030] The L-AN100# total loss system oil is a base oil for the production of special lubricating oils. Choose base oils from three different manufacturers and mark them as 4#, 5# and 6#. Weigh 150g of each and pass the chromaticity test of petroleum products. The tester measures the original chromaticity value of 4#, 5# and 6# base oil respectively, pours 4#, 5# and 6# base oil into three 250ml beakers, and puts the three beakers on adjustable voltage Heat on a closed electric furnace, raise the temperature of 4#, 5# and 6# base oils to 145°C under constant stirring by the stirrer, heat for 40 minutes and then cool down to room temperature, and then use a petroleum product colorimeter to measure the corresponding The high temperature chromaticity value, the specific parameters are shown in the table below:

[0031] base oil 4# 5# 6# origin...

Embodiment 3

[0038] Formulation Screening for the Development of Specialty Lubricants

[0039] H2010 is a self-developed high-temperature lubricating oil, using different antioxidants for formula screening to produce four oil samples A, B, C, and D. Weigh 150g of each of the four oil samples and measure the original chromaticity values ​​of the four oil samples A, B, C, and D through a petroleum product colorimeter, and pour the four oil samples A, B, C, and D into In four 250ml beakers, heat the four beakers on a closed electric furnace with adjustable voltage, and raise the temperature of the four oil samples A, B, C, and D to 155°C while stirring continuously with the stirrer, and heat for 40 minutes After cooling to room temperature, the corresponding high-temperature chromaticity values ​​are measured with a petroleum product chromaticity meter, and the specific parameters are shown in the table below:

[0040] H2010 high temperature lubricating oil A B C D origi...

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PUM

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Abstract

The invention relates to a method for determining the thermal oxidation stability of lubricating oils of the same label by chromatic change values. The method comprises the following steps of: respectively weighing 150 g of a plurality of lubricating oils of the same label firstly and respectively measuring the original chromatic values of the lubricating oils by a chroma determinator; pouring the lubricating oils into 250-ml beakers respectively and putting the beakers on a voltage-adjustable closed electric furnace for heating; heating up the lubricating oils to the temperature of 150+ / -5 DEG C with the continuous stirring of stirrers, heating for 40 minutes, and then respectively measuring high-temperature chromatic values by using the chroma determinator when the lubricating oils are cooled to the room temperature, wherein the chromatic change value is equal to the difference between the high-temperature chromatic value and the original chromatic value, smaller chromatic change values indicate that the lubricating oils with the smaller chromatic change values have higher thermal oxidation stability, bigger chromatic change values indicate that the lubricating oils with the bigger chromatic change values have lower thermal oxidation stability, and the lubricating oils with higher thermal oxidation stability are the lubricating oils with better quality among the lubricating oils of the same label. The determined result obtained by the method disclosed by the invention is consistent with a laboratory detection result, therefore, the method can be used for quickly verifying the thermal oxidation stability of the lubricating oils.

Description

technical field [0001] The invention belongs to the technical field of lubricating oils, in particular to a method for judging the thermal oxidation stability of lubricating oils of the same brand through chromaticity change values. Background technique [0002] At present, there are five domestic detection methods for the oxidation stability of lubricating oils: [0003] "SH / T0193 Lubricating Oil Oxidation Stability Determination Method" (or Rotary Oxygen Bomb Method), this method stipulates that the sample, distilled water and copper catalyst coil are put together in a glass sample container with a cover, and then put Put it in an oxygen bomb equipped with a pressure gauge. The oxygen bomb is filled with oxygen at a pressure of 620kPa at room temperature, and placed in an oil bath at a specified temperature (140°C for insulating oil; 150°C for steam turbine oil). The oxygen bomb forms an angle of 30 degrees with the horizontal plane and rotates axially at a speed of 10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 陈蓉段欣生田前进
Owner LUOYANG BEARING RES INST CO LTD
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