Simulation Modelling Practice and Theory ( IF 4.2 ) Pub Date : 2021-07-14 , DOI: 10.1016/j.simpat.2021.102371 Jing Liu 1, 2 , Hengtai Ni 1, 2 , Zidan Xu 3 , Guang Pan 1, 2
Lubricating characteristics of support bearings in gearboxes would greatly affect operational performances of gear transmission systems. To discuss the lubricating characteristics of oil-jet lubricated ball bearing in the gearbox, a fluid-structure coupled simulation model based on the CFD method is established. It can model the air-oil two-phase flow (AOTPF) in the bearing. The volume of fluid (VOF) approach is applied to formulate the AOTPF. The flow zone in the inside and outside of bearing is described by the slip mesh plane. It seems that the oil flow rate, lubricating oil viscosity, nozzle angle, and number of the nozzle could greatly affect the bearing lubricating characteristics in the gearboxes. The results show that the lubricating oil distribution of the internal bearing is uneven during the lubricating process. The minimum oil volume fraction (OVF) is observed near the upstream of the nozzle in the direction of bearing rotation. The average OVF and oil passing rate decrease with the increment of the bearing speed and lubricating oil viscosity. This study can provide some guidance to improve the lubricating characteristics of support ball bearings in the gearboxes.
中文翻译:
喷油润滑球轴承润滑特性仿真分析
齿轮箱中支撑轴承的润滑特性将极大地影响齿轮传动系统的运行性能。为探讨齿轮箱内喷油润滑球轴承的润滑特性,建立了基于CFD方法的流固耦合仿真模型。它可以模拟轴承中的油气两相流 (AOTPF)。流体体积 (VOF) 方法用于制定 AOTPF。轴承内外的流动区由滑动网格平面描述。似乎油流量、润滑油粘度、喷嘴角度和喷嘴数量可以极大地影响齿轮箱中的轴承润滑特性。结果表明,润滑过程中轴承内部润滑油分布不均。在轴承旋转方向的喷嘴上游附近观察到最小油体积分数 (OVF)。平均OVF和油通过率随着轴承转速和润滑油粘度的增加而降低。该研究可为改进齿轮箱中支撑球轴承的润滑特性提供一些指导。