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CSME 2022/08
Volume 43 No.4
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327-335
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Study on the Proportion Law of Sulfur Extreme Pressure Additives Based on Response Surface Methodology
Yu-Ling Wanga, Kang Zhoua, Qi Liub, Heng-Di Yuanb, Guang-Neng Dongb and Guo-Liang Mac
aPetro China Lanzhou Lubricating Oil R & D Institute, Lanzhou 730000, PRC
bKey Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an, 710049, PRC
cPetroChina Lubricant Company, Beijing, 100000, PRC
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Abstract:
Extreme pressure (EP) additives are an important component of gear oils, which are used to prevent gears from sticking, ploughing and other wear under extreme working conditions, and to protect tooth surfaces and extend the service life of gear oils. The anti-friction and anti-wear properties of three extreme pressure single agents under the contact pressure of 1.2 GPa were studied in this paper, and the optimal concentration range of the three additives was determined. The action mechanism of additives was analyzed by XPS and SEM. To combine the advantages of the three additives and study the proportion law of the three additives, taking the additive concentration as the input, the COF and the wear rate as the response, Box-Behnken design (BBD) sampling method was used to select the experimental data. The relationship between the concentration and COF and wear rate was obtained through the response surface methodology (RSM) with Design Expert software, and the influence of the concentration of three additives on the response value was discussed through the RSM curve. The optimized concentration ratio was obtained through the desirability analysis. Then the friction and wear value of the predicted value were verified through the experiment, and the error was within 4%.
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Keywords: EP additives; proportion law; Box-Behnken design; response surface methodology
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*Corresponding author; e-mail: 1029156055@qq.com
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©
2022
CSME , ISSN 0257-9731
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