Effects of Dimensional Tolerances on the Friction Power Loss of Hydrodynamic Journal Bearing System

• Published in: 东华大学学报（英文版） Vol. 31; no. 3; pp. 266 - 271
• Main Author: 魏塬 陈照波 焦映厚 徐武彬
• Format: Journal Article
• Language: English
• Published: School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China%School of Mechanical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China 30.06.2014
• Subjects: factor design; hydrodynamic journal bearing; dimensional tolerances; friction power loss
• ISSN: 1672-5220

According to the dimensional tolerances on hydrodynamic journal bearing system, a nonlinear oil film force model was established,and the Reynolds＇ equation was solved by adopting finite difference method. In order to fulfill different dimensional tolerances in the system,adopting 2kfactor design and using the eccentricity ratio corresponding to the stability critical curve,the effects of the friction power loss brought by the dimensional tolerances of the dynamic viscosity,bearing width,bearing diameter and journal diameter were analyzed. The effect on dynamic characteristics of the hydrodynamic journal bearing system was quantitatively analyzed,and the nonlinear dynamic analysis, modeling and calculation methods were studied while considering the manufacturing tolerances. The results show that in contrast to the impacts of the tolerances in journal diameter,dynamic viscosity and bearing width,the bearing diameter tolerance would lead to the rise in the power loss, and the dimensional tolerances have different degrees of impacts on the journal bearing system. The friction power loss decreased as the eccentricity ratio increased, and when the eccentricity ratio was 0. 695 the power loss came to the minimum.The investigation would find the best solution and reduce energy consumption,then control varieties of nonlinear dynamical behavior effectively,and provide a theoretical basis for hydrodynamic journal bearing system in parameter design.