Theoretical Calculation and Experiment of Friction Coefficient of Spherical Inlaid Lubrication Structure

doi:10.3901/JME.2025.19.137

Abstract

Abstract: In order to study the influence of solid lubricant performance and inlay hole shape on the friction performance of the spherical friction pair under low-speed and heavy-load conditions under inlay lubrication conditions, a variety of solid lubricants were firstly prepared by mixing graphite and phenolic resin, and tested to obtain their mechanical properties and friction performance as a basis for theoretical calculations; and then, with the actual operation of the herringbone gates of the Three Gorges Dam as a theoretical basis, and with the criterion of equal contact area, we constructed four types of cylindrical, conical, quadrangular conical and spherical crown shaped axle tiles. Then, based on the theoretical basis of the actual operation of the Three Gorges Dam, and with the criterion of equal contact area, we constructed four kinds of inlaid hole shapes of cylindrical, conical, quadrangular conical and spherical crown shaped axial shingles, and calculated the static and dynamic stress-strain conditions of the spherical friction sub, so as to obtain the theoretical friction coefficients of the large-scale spherical friction sub. The results show that the average coefficient of friction obtained from the test is more consistent with the theoretical value, and under the same graphite inlay lubrication conditions, the coefficient of friction of the cylindrical inlaid hole axial tile is the lowest, and the results of the study provide theoretical guidance for the prediction of the coefficient of friction of the subsequent inlaid lubrication structure.

Key words: inlay lubrication, low speed and heavy load, coefficient of friction, theoretical calculation

CLC Number:

TH117

XU Xiang, ZHANG Yan, ZENG Yuanming, LIU Biao, FENG Zekang, ZHAO Meiyun. Theoretical Calculation and Experiment of Friction Coefficient of Spherical Inlaid Lubrication Structure[J]. Journal of Mechanical Engineering, 2025, 61(19): 137-145.

References

[1] 司敬阳. 人字闸门底枢结构改进及材料选用[J]. 水利电力机械，2007(2)：11-14. SI Jingyang. Improvement and material selection of the bottom pivot structure of the herringbone gate [J]. Water Conservancy and Electric Machinery，2007(2)：11-14.
[2] YE J，KHARE H S，BURRIS D L. Quantitative characterization of solid lubricant transfer film quality[J]. Wear，2014，316(1-2)：133-143.
[3] CUI G，HAN B，ZHAO J，et al. Comparative study on tribological properties of the sulfurizing layers on Fe，Ni and Co based laser cladding coatings[J]. Tribology International，2019，134：36-49.
[4] YOU W，XUELIANG S，SHOULIAN X，et al. Study on the microstress and size of mosaic block and their relationship to the wear resistance of steels[J]. Wear，1993，162：183-187.
[5] 周素霞，白小玉，裴顶峰，等. 基于微尺度的列车制动金属镶嵌行为研究[J]. 机械工程学报，2021，57(2)：210-218. ZHOU Suxia，BAI Xiaoyu，PEI Dingfeng，et al. Research on metal embedding behavior of train braking based on microscale [J]. Journal of Mechanical Engineering，2021，57(2)：210-218.
[6] MOYLE N，DONG H，WU H，et al. Increased sliding friction of a lubricated soft solid using an embedded structure[J]. Tribology Letters，2022，70：1-12.
[7] XUE R，WANG J，ZENG Y，et al. Self-lubrication behavior of the reaction-formed graphite/SiC composites with optimizing graphite content[J]. Wear，2023，526：204946.
[8] TANG W，WANG Y，ZHU X，et al. Graphitic carbon nitride quantum dots as novel and efficient friction- reduction and anti-wear additives for water-based lubrication[J]. Wear，2023，528：204950.
[9] FAN S，FAN H，CHENG J，et al. Structural design and performance study of codensified continuous reticular cu663/graphite self-lubricating composites[J]. Tribology International，2023，178：108050.
[10] WANG Q，SUN J，YU M，et al. Study on the lubrication film formation and characteristics of different graphite seal composites[J]. Journal of Mechanical Science and Technology，2022，36(8)：3949-3959.
[11] OMRANI E，MOGHADAM A D，ALGAZZAR M，et al. Effect of graphite particles on improving tribological properties Al-16Si-5Ni-5Graphite self-lubricating composite under fully flooded and starved lubrication conditions for transportation applications[J]. The International Journal of Advanced Manufacturing Technology，2016，87：929-939.
[12] MORSTEIN C E，DIENWIEBEL M. Graphite lubrication mechanisms under high mechanical load[J]. Wear，2021，477：203794.
[13] HUAI W，ZHANG C，WEN S. Graphite-based solid lubricant for high-temperature lubrication[J]. Friction，2021，9：1660-1672.
[14] 徐翔，张祖悦，王兴华，等. 不同固体润滑下人字闸门底枢摩擦特性的销盘试验研究[J]. 摩擦学学报，2022，42(5)：1044-1052. XU Xiang，ZHANG Zuyue，WANG Xinghua，et al. Pin disk experimental study on the friction characteristics of the bottom pivot of a herringbone gate under different solid lubricants [J]. Tribology，2022，42(5)：1044-1052.
[15] 赵新泽，王兴华，徐翔，等. 石墨润滑下人字闸门底枢摩擦副摩擦学性能[J]. 润滑与密封，2022，47(8)：107-113. ZHAO Xinze，WANG Xinghua，XU Xiang，et al. Tribological properties of the bottom pivot friction pair of the herringbone gate under graphite lubrication [J]. Lubrication Engineering，2022，47(8)：107-113.
[16] 刘春慧，程先华，王成焘. 铝锡轴瓦的疲劳裂纹分析[J].机械工程学报，2001，37(8)：4. LIU Chunhui，CHENG Xianhua，WANG Chengtao. Fatigue crack analysis of aluminum tin bearing shells [J]. Journal of Mechanical Engineering，2001，37(8)：4.
[17] 王海龙，曹均，黄海波，等. 压榨机关节轴承镶嵌孔设计及分析[J]. 机械设计与制造，2022(10)：380. WANG Hailong，CAO Jun，HUANG Haibo. Design and analysis of joint bearing inlay hole of press machine[J]. Mechanical Design and Manufacturing，2022(10)：380.
[18] 葛佐正. 镶嵌石墨含油轴承在大型起重机上的应用[J]. 冶金设备，1999(1)：29-31. GE Zuozheng. Application of embedded graphite oil bearing on large cranes [J]. Metallurgical Equipment，1999(1)：29-31.
[19] 徐翔，刘彪，丰泽康，等. 低速重载球面摩擦副石墨镶嵌润滑结构设计及比较[J]. 润滑与密封，2023，48(11)：115-122. XU Xiang，LIU Biao，FENG Zekang，et al. Design and comparison of graphite embedded lubrication structure for low-speed heavy-duty spherical friction pairs [J]. Lubrication Engineering，2023，48(11)：115-122.
[20] 张恩，符蓉，沈长斌，等. 铜包石墨对酚醛树脂基复合材料摩擦学性能的影响[J]. 表面技术，2020，49(12)：170-176. ZHANG En，FU Rong，SHEN Changbin，et al. The effect of copper coated graphite on the tribological properties of phenolic resin based composites [J]. Surface Technology，2020，49(12)：170-176.
[21] GAN J，ZHANG X，ZHANG W，et al. Research progress of bonding agents and their performance evaluation methods[J]. Molecules(Basel，Switzerland)，2022，27(2)：340.