摘要
以某种带回油线的唇形密封作为研究对象,通过有限元软件建立油封的仿真计算模型。该模型耦合考虑唇封与轴之间的接触力学分析和润滑油膜的三维流场分析。在计算中,通过调整油膜厚度和唇口轮廓使流体压力与接触压力达到平衡从而实现流固耦合。通过仿真计算得到唇封的接触宽度、径向力和反向泵送率等参数。通过台架实验测得无压差条件下的泄漏量并与理论计算结果进行对比,验证了模型的准确性。基于该模型对无压差和有压差2种工况下的静态接触特性与动态流场进行分析,探讨带回油线唇形密封的工作机制。该理论模型计算效率高,且在较大转速范围内保证了良好的精度,可以应用到其他流体动压油封的开发设计上,具有很好的工程价值。
A type of lip seal with helix ribs was investigated by using finite element simulation software.A coupled fluid-structure model was developed,which included a solid mechanics model and three-dimensional flow field model.By adjusting the thickness of oil film and lip contour,a balance between fluid pressure and contact pressure was achieved.Key parameters about lip seals such as contact width,radial force and reverse pumping rate were calculated.The validity of this theoretical model was confirmed by comparing the simulated results with the experimental results.Based on this model,the static contact characteristics and dynamic flow filed distribution under non-pressure condition and pressure condition were analyzed,which helps to reveal the mechanism of lip seal with helix ribs.This new theoretic model has high computational efficiency and accuracy within a large speed range and can be applied to the development and design of other hydrodynamic lip seals.
作者
李雪梨
郭飞
索双富
贾晓红
庞明磊
LI Xueli;GUO Fei;SUO Shuangfu;JIA Xiaohong;PANG Minglei(State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China;Shandong Nonmetal Material Research Institute,Jinan Shandong 250031,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2019年第2期21-26,共6页
Lubrication Engineering
基金
国家自然科学基金项目(51575300)
关键词
回油线
油封
反向泵送
流体动压效应
helix ribs
lip seals
reverse pumping effect
hydrodynamic effect
