摘要
建立了A型干气密封动、静环和密封间隙流场的3维计算模型,在ANSYS的Workbench平台采用热–流耦合方法求解动、静环3维稳态热传导方程,得到其温度场。数值模拟结果表明:气膜黏性剪切热是干气密封系统的主要热源;在给定工况、给定密封结构中,83.3%的气膜黏性剪切热通过密封端面传递给动环,只有9.7%传递给静环,剩余7.0%的热量由泄漏介质带走;动环平均温度略高于静环;动、静环端面温度最高,背面温度较低;在端面上温度也不是均匀的,在螺旋槽根部至密封泄漏出口段温度达到最高。研究结果为干气密封动、静环变形研究、选材和结构设计理论的完善提供了一定的参考依据。
The temperature fields of the sealing rings of a dry gas seal are the basis for analyzing face distortions. Three-dimensional models of the rotating ring,stationary ring,and clearance gap of type-A dry gas seal with a spiral grooved face were built. A three-dimensional steadystate heat conduction equation for the sealing rings was solved using ANSYS Workbench and the temperature fields of sealing rings were obtained. The results showed that viscous shear heat of the gas film was the main heat source of the dry gas seal system. 84% of viscous shear heat was transferred to the rotating ring through the seal end face. Only 9. 7% of the heat was transferred to the stationary ring. And the remaining was carried away by the leakage gas. The average temperature of the rotating ring was slightly higher than that of the stationary ring. The temperature of the end face for each seal ring was higher than that of the back of the ring. The temperature of the end face for each ring was not uniform and achieved the highest near the root of a spiral groove. These results provide the basis for the improvement of theory on the research of the face distortions of the rotor and the stator of a dry gas seal,the selection of their materials,and design of their structures.
出处
《四川大学学报（工程科学版）》
EI
CSCD
北大核心
2014年第3期175-181,共7页
Journal of Sichuan University (Engineering Science Edition)
关键词
干气密封
温度场
密封环
数值计算
dry gas seal
temperature field
sealing rings
numerical simulation
