石油化工高等学校学报2017，Vol.30Issue(2)：91-96,6.DOI:10.3969/j.issn.1006-396X.2017.02.017
干气密封摩擦副启停阶段摩擦特性的仿真研究
A Numerical Simulation Study of Frictional Characteristics of Seal Faces on the Starting and Stopping Process of a Dry Gas Seal
丁雪兴 1王文鼎 1金海俊 1赵海红1
作者信息
- 1. 兰州理工大学 石油化工学院,甘肃 兰州 730050
- 折叠
摘要
Abstract
The starting and stopping processes play an important role in reduce friction and abrasion of a spiral groove dry gas seal.Thus, the startup and shutoff of the seal is investigated by a numerical approach.The computational procedure based on the material properties of rotational and stationary rings, interaction of micro asperity, and frictional heat-flow coupling is implemented to build a three-dimensional thermo-mechanical coupling model considering sliding friction within rough-rigid body.And then, the ANSYS software is used to simulate the friction heat and the stress variation of rough-rigid body based on the characteristics of nonlinear multiphysics.The results are presented, and it shows that the maximum contact temperature value of the roughened surface increases with increase in the sliding time and presents a little fluctuation, and the distribution of VonMises equivalent stress is extremely non-uniform and non-linear.What's more, the stress component of maximum x-direction(σxx) isn't appeared in the region of highest contact asperity.The results reveal that a tensile stress is existed along the thickness direction of three-dimensional rough solid and the region of tensile stress is enlarged slightly with the sliding time.According to above results, it can be shown that increase in temperature and fluctuation are attributed to thermal conduction caused, the change of stress is due to the elastic-plastic deformation of asperities.These results illustrate the potential of numerical simulation in prediction the temperature and stress of seal faces during the starting and stopping process and may help in the design and optimization of spiral groove dry gas seal.关键词
干气密封/微凸体/滑动摩擦/弹塑性变形/温升/应力Key words
Dry gas seal/Asperity/Sliding friction/Elastic-plastic deformation/Temperature rise/Stress分类
能源科技引用本文复制引用
丁雪兴,王文鼎,金海俊,赵海红..干气密封摩擦副启停阶段摩擦特性的仿真研究[J].石油化工高等学校学报,2017,30(2):91-96,6.
