摘要
为进一步提升列车齿轮箱轴承端盖处密封结构的密封效果,有效阻止减速器内外流体交换,在前期设计的密封结构基础上,对两侧叶轮的内径、叶片两侧倾角、叶片底部倾角、叶片侧边倒圆角以及中部叶轮叶片数目等密封结构参数进行优化分析。结合流体动力学分析结果及前期实验数据,探究各参数对密封效果的影响。结果表明:两侧叶轮叶片内径、叶片侧面倾角对密封效果影响较大,其他参数对密封效果影响较小;相较于原密封结构,优化设计后轴端密封结构中部叶轮相对两侧叶轮的关键平面平均压差从22.97 Pa提升至357.94 Pa,且从速度流线图可以看出在密封结构中部会形成明显的隔离区,能有效阻止齿轮箱内外流体沟通,提升轴端密封性能。
In order to further improve the sealing effect of the sealing structure at the bearing end cover of the train gearbox,and effectively prevent the fluid exchange between the inside and outside of the reducer,based on the previously designed sealing structure,the sealing structure parameters,such as the inner diameter of the impellers on both sides,the inclination of both sides of the blade,the inclination of the bottom of the blade,the fillet of the side of the blade and the number of blades in the middle of the impeller,were optimized and analyzed.Combining the hydrodynamic analysis results and the previous experimental data of the sealing structure,the influence of various parameters on sealing effect was explored.The results show that the inner diameter of the impeller blades on both sides and the inclination angle of the blade side have great influence on the sealing effect,while other parameters have little influence on the sealing effect.Compared to the original sealing structure,the average pressure difference on the key plane between the impeller in the middle and the impeller on the opposite sides of the shaft end seal structure after optimization is increased from 22.97 Pa to 357.94 Pa.And it is found from the velocity streamline diagram that an obvious isolation zone is formed in the middle of the seal structure,which can effectively prevent the fluid leakage inside and outside the gearbox and improve the sealing performanceofthe shaftend.
作者
林佳旭
沙智华
李宝良
LIN Jiaxu;SHA Zhihua;LI Baoliang(School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2024年第2期131-136,共6页
Lubrication Engineering
关键词
齿轮箱
轴端密封
叶片倾角
速度流线图
gearbox
shaft end seal
blade inclination
velocity streamline diagram
