摘要
针对干气密封中气膜厚度稳定性的要求以及多级调控操作条件易导致失效的问题,进行基于Workbench的螺旋槽型干气密封系统的动力学特性分析研究。建立一种浮动环(静环)的轴向振动模型,并推导其轴向振动幅值表达式;运用Workbench对浮动环系统进行工况条件下的预应力模态分析和谐响应分析,将模拟仿真与理论推导结果做对比,分析总结得出同一参数不同数值条件下浮动环轴向振动幅值的变化趋势,以及影响浮动环轴向振动幅值的主要因素和次要因素。该方法不仅能够灵活地获得不同条件下浮动环的振幅值,并且从激振频率与固有频率的关系方面解释了振动趋势形成的原因。
For the stability of gas film thickness and multistage regulation operating conditions leading to failure in dry gas seal,the dynamic characteristics of dry gas seal with spiral groove were analyzed based on Workbench. A model of axial vibration of a floating ring( static ring) was established,and the expression of axial vibration amplitude was derived. Workbench was applied to finish prestressed modal analysis and harmonic response analysis of the floating ring system under working conditions. The simulation was compared with the results of theoretical derivation. The change trend of axial vibration amplitude of the floating ring was got under the same parameters with different values,and the main and minor factors affecting the axial vibration amplitude of the floating ring were distinguished. This approach not only obtained the values of the amplitude of floating ring under different conditions flexibly,but also explained the trend of vibration from the relationship between vibration frequency and inherent frequency.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2016年第S2期155-160,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家科技重大专项课题资助项目(2013ZX04005-012)
四川省科技支撑计划资助项目(2014GZ0128)
