Friction Torque Calculation Method of Ball Bearings Based on Rolling Creepage Theory

doi:10.3901/JME.2017.22.219

Abstract

Abstract: The creepage model for ball bearings is formulated by decoupling the ball/raceway contact into the normal contact problem and tangential creepage problem. The normal contact problem can be solved by Herzian contact theory and the tangential problem by rolling contact creepage theory. The attitude of balls is determined solely by the creepage and normal contact forces between the balls and inner/outer raceways. This model can be used to calculate running behaviors such as friction torque of ball bearings specially under solid lubricant-lubricated or dry contact conditions. Firction torques of three types of deep-groove ball bearings respectively made of different materials such as ceramic, GCr15 and stainless steel are measured and evaluated against calculated results. The results show that this model can give a more accurate result than traditional method with sliced contact areas.

Key words: ball bearings, creepage theory, friction torque, rolling contact

CLC Number:

TH117

MA Zikui, CHEN Wenhua. Friction Torque Calculation Method of Ball Bearings Based on Rolling Creepage Theory[J]. Journal of Mechanical Engineering, 2017, 53(22): 219-224.

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