基于转子-轴承-干气密封系统静环振动分析  

Vibration analysis of static ring based on rotor-bearing-dry gas seal system

作　　者：张伟政[1] 赵志宏 姜娥 洪海民 ZHANG Wei-zheng;ZHAO Zhi-hong;JIANG E;HONG Hai-min(College of Petrochemical Technology,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2022年第2期67-72,共6页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(18JR3RA145)。

摘　　要：以转子-轴承-干气密封系统为研究对象,综合考虑轴承油膜力及外界瞬时激振力对干气密封系统稳定性的影响,建立转子-轴承-干气密封系统轴向振动模型,并利用近似解析法求解微尺度下的非线性雷诺方程,同时耦合振动方程推导得出气膜轴向刚度及轴向阻尼的表达式并编程计算.通过分析不同螺旋槽数响应下时间历程图和相轨图,探寻系统轴向振动特性最优螺旋槽数范围,对比分析干气密封静环-气膜系统和转子-轴承-干气密封系统在实际工况下干气密封槽型参数的稳定范围,为干气密封非线性稳定性研究及设计提供理论指导.Taking the rotor-bearing-dry gas seal system as the research object,considering the effect of bearing oil film force and outside instantaneous excitation force on the stability of dry gas seal system,the rotor-bearing-axial vibration model of dry gas seal system is established,a nonlinear Reynolds equation under the microscale is solved by using approximate analytical method,at the same time,the equation of axial stiffness and axial damping of gas film are derived by using the coupled vibration equation,and the calculation is programmed.By analyzing the response time history diagram and phase track diagram under different spiral slot number,the optimal range of spiral slot number for the axial vibration characteristics of the system is investigated.Compare and analyze the stability range of dry gas seal groove parameters of dry gas seal ring-gas film systems and rotor-bearing-dry gas seal system under the actual working conditions,so as to provide theoretical guidance for the research and design of nonlinear stability of dry gas seal.

关 键 词：干气密封 轴向振动 槽数 

分 类 号：TQ051[化学工程] TH113.1[机械工程—机械设计及理论]