Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (10): 116-121.doi: 10.3969/j.issn.1000-565X.2015.10.017

• Mechanical Engineering • Previous Articles     Next Articles

Effects of Raceway Surface Dents on Oil Film Characteristics of Grease-Lubricated Rolling Bearing#br#

Peng Chao-lin1  Huang Bo2  Xie Xiao-peng3  Chen Zhen4  Li Xing-lin5   

  1. 1． School of Automobile，Chang’an University，Xi’an 710064，Shaanxi，China; 2． College of Applied Science and Techonlogy，Hainan University，Danzhou 571737，Hainan，China; 3． School of Mechanical and Automobile Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China; 4． Faculty of Mechanical and Electronic Information，China University of Geosciences，Wuhan 430074，Hubei，China; 5． Hangzhou Bearing Test ＆ Research Center，Hangzhou 310022，Zhejiang，China
  • Received:2014-10-13 Revised:2015-06-12 Online:2015-10-25 Published:2015-09-06
  • Contact: 谢小鹏(1961-)，男，教授，博士生导师，主要从事摩擦学理论与应用研究． E-mail:xiexp@ scut.edu.cn
  • About author:彭朝林(1987-)，男，博士，主要从事汽车摩擦学与润滑理论研究．E-mail: peng.c.l@foxmail.com
  • Supported by:
    Supported by the Natural Science Foundation of Guangdong Province(S2011010002118)

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Abstract: In this paper，the numerical calculation method is employed to analyze the effects of the surface dents in
rolling bearing raceways of different sizes and locations on the distribution of the oil film pressure and thickness in the state of grease lubrication． Then，the distribution is compared with that on a smooth surface． Finally，the results of theoretical analyses are verified by using a SEM and an EDS． The results show that (1) due to the existence of surface dents，the film pressure reaches the peak in the edges of the surface dents，while it decreases sharply in the central areas of surface dents; (2) the film thickness zooms in the lubrication areas of surface dents in the direction from near the entrance side to the exit side，but the film on the whole is thinner than that on a smooth surface; and (3) both the size and the location of surface dents have significant influences on the distribution of the oil film pressure and thickness．

Key words: rolling bearing, greases, surface dent, numerical calculation

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