Author(s)

Guorong Wang, Wang Juan, Lin Zhong

Southwest Petroleum University, Chengdu, China.

Lubrication media of rock bit journal bearing is non-Newtonian fluid, and because of structure limitations, lubricant supply is only from the inside track and its rheological properties are relatively complex. In general studies, the non- Newtonianism of lubrication media of rock bit journal bearing is neglected to simplify the research process. Based on the universal Reynolds equation of non-Newton media, the mathematical model of lubrication analysis was suitable for the rock bit bearing working conditions was established. Then according to the experimental results of rheological properties of RB-type lubricating grease, the equivalent viscosity of the model was established and this model can be solved by the method used in solving the Reynolds equation of Newton fluid.

Journal Bearing; Rock Bit; Lubrication Model; RB Grease

G. Wang, W. Juan and L. Zhong, "Research on Lubrication Model of Rock Bit Bearings with Non-Newtonian Medium," Modern Mechanical Engineering, Vol. 2 No. 1, 2012, pp. 1-5. doi: 10.4236/mme.2012.21001.