摘要
为解决高速列车通过隧道时由于列车走行速度较快导致齿轮箱外界气压低于内部气压,润滑油从齿轮箱内部泄漏的这一问题,利用不同叶轮随轴旋转搅动轴承套筒内部的空气会形成不同压力区的原理,在轴承端盖内部设计一组可随传动轴同步双向转动的叶轮组密封结构。通过三维建模切出流道模型,采用流体力学软件仿真分析叶轮组流道中压力分布和速度分布。结果表明:中部叶轮区域会形成高压区,两侧叶轮会形成低压区,可有明显改善齿轮箱漏油现象;流道中的速度分布没有出现明显的断流、涡流现象。根据流体分析结果,探究密封结构中叶轮组相对最优结构参数,为有关齿轮箱密封结构优化设计提供参考。
When the high⁃speed train passes through the tunnel,the external air pressure of the gearbox is lower than the internal air pressure,which will cause the lubricating oil leakage of the gearbox.Aimed at the lubricating oil leakage problem of the gearbox,based on the principle that different impellers rotate with the shaft to stir the air inside the bearing sleeve will form different pressure zones,a set of impeller group sealing structure was designed in the bearing end cover,which can rotate in two directions synchronously with the transmission shaft.The passage model was cut out through three⁃dimensional modeling,and the pressure distribution and velocity distribution in the impeller group channel were simulated and analyzed by the hydrodynamics software.The results show that there is a high pressure region in the middle impeller region and a low pressure region in both sides of the impeller,which can significantly improve the oil leakage of the gear⁃box.The velocity distribution in the flow channel has no obvious phenomenon of cut⁃off and eddy current.According to the results of fluid analysis,the relative optimal structural parameters of the impeller group in the sealing structure were explored,which provides a reference for the optimal design of gearbox sealing structure.
作者
林佳旭
李宝良
LIN Jiaxu;LI Baoliang(Harbin Metro Group Co.,Ltd.,Harbin Heilongjiang 150000,China;School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2021年第11期157-162,共6页
Lubrication Engineering
关键词
密封结构
叶轮
流体力学分析
齿轮箱
高速列车
sealing structure
impeller
hydrodynamics analysis
gearbox
high⁃speed train
