摘要
间隙油膜流态对静压推力轴承润滑性能有显著影响,却无法通过试验直接进行分析.针对此问题,运用计算流体动力学和润滑理论对静压推力轴承间隙油膜流动进行数值模拟.建立定常不可压缩紊流模型,采用有限体积法和二阶精度的差分格式离散方程.通过将数值模拟结果与理论公式计算结果的比较,验证了所采用的数值模拟方法的正确性.模拟结果表明,随着工作台旋转速度的增加,封油边润滑油的流动始终为层流,而油腔中润滑油流动逐渐由层流变为紊流.该研究成果为静压推力轴承摩擦功耗及温升计算提供理论依据.
The flow patterns of gap oil film have significant effect on the lubricating performance of hydrostatic thrust bearing,but it cannot be directly analyzed by the experiment. The laminar flow patterns of gap oil film in the hydrostatic thrust bearing are simulated by Computational Fluid Dynamic and lubrication theory in order to solve this problem. The steady incompressible turbulent model is established,the equations are dispersed by using finite volume method and second order accuracy difference scheme. By comparison results of numerical simulation and theoretical calculation,it demonstrates that the numerical simulation method is correct. The simulation results show that with increasing rotation velocity,the flow patterns of lubricating oil on the resistive oil edges is laminar flow,and the flow patterns of lubricating oil in the oil cavity gradually changes from laminar flow to turbulent flow. The results of the study provide theoretical basis of the friction power consumption and temperature rise calculation for the hydrostatic thrust bearing.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2015年第6期42-46,共5页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(51375106
51375123)
关键词
静压推力轴承
油膜流态
数值模拟
计算流体动力学
hydrostatic thrust bearing
oil film flow patterns
numerical simulation
computational fluid dynamics
