Model formulation of churning losses in cylindrical roller bearings based on numerical simulation

被引：18
作者：
Gao, Wenjun [1 ,2 ]
Nelias, Daniel [1 ]
Boisson, Nicolas [1 ]
Lyu, Yaguo [2 ]
机构：
[1] Univ Lyon, INSA Lyon, CNRS, LaMCoS UMR5259, F-69621 Villeurbanne, France
[2] Northwestern Polytech Univ, Sch Power & Energy, Xian, Shaanxi, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2018年 / 121卷
关键词：
Cylindrical roller bearings; Churning moment; Power losses; Roller orbital speed; DRAG;
D O I：
10.1016/j.triboint.2018.02.003
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A numerical-based fluid mechanics model is proposed to predict churning losses in cylindrical roller bearings, which is caused by the rotation and the translation of the rollers in the bearing cavity. The Computational Fluid Dynamics (CFD) method is conducted to quantify the influence of various factors on churning losses, including operating conditions, roller geometry parameters, and fluid properties. One configuration with several in-line finite-length circular cylinders sandwiched by two flat walls is analyzed in one-phase environment, which represents a simplified approache. The results indicate that the roller orbital speed, the presence of adjacent rollers, and the rings have a significant impact on the churning moments. Finally a formulation is proposed for churning losses prediction in cylindrical roller bearings. This is of particular interest for high-speed applications where churning losses may represent up to 50% of the total power dissipated.
引用
收藏
页码：420 / 434
页数：15
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