Performance of dynamically loaded journal bearings lubricated with couple stress fluids considering the elasticity of the liner  

作　　者：Yan-yanMA 

机构地区：[1]School of Publishing and Printing, University of Shanghai for Science and Technology, Shanghai 200093, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2008年第7期916-921,共6页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. 571123) supported by the Scientific Research SpecialFoundation for the Excellent Youth Teacher of Shanghai University byEducation Committee of Shanghai, China

摘　　要：To take into account the couple stress effects, a modified Reynolds equation is derived for dynamically loaded journal beatings with the consideration of the elasticity of the liner. The numerical results show that the influence of couple stresses on the bearing characteristics is significant. Compared with Newtonian lubricants, lubricants with couple stresses increase the fluid film pressure, as a result enhance the load-carrying capacity and reduce the friction coefficient. However, since the elasticity of the liner weakens the couple stress effect, elastic liners yield a reduction in the load-carrying capacity and an increase in the friction coefficient. The elastic deformation of the bearing liner should be considered in an accurate performance evaluation of the journal bearing.To take into account the couple stress effects,a modified Reynolds equation is derived for dynamically loaded journal bearings with the consideration of the elasticity of the liner. The numerical results show that the influence of couple stresses on the bearing characteristics is significant. Compared with Newtonian lubricants,lubricants with couple stresses increase the fluid film pressure,as a result enhance the load-carrying capacity and reduce the friction coefficient. However,since the elasticity of the liner weakens the couple stress effect,elastic liners yield a reduction in the load-carrying capacity and an increase in the friction coef-ficient. The elastic deformation of the bearing liner should be considered in an accurate performance evaluation of the journal bearing.

关 键 词：Journal bearings Couple stress ELASTICITY LUBRICATION 

分 类 号：TH113.31[机械工程—机械设计及理论]