为分析转子—阻尼器—密封系统在密封的作用下所出现的不稳定现象以及阻尼器在抑制系统不稳定中的作用，对于一个水平放置的转子模型，考虑了线性形式的密封作用力、线性阻尼器以及非线性阻尼器的作用，通过求解综合运动微分方程的特征值，讨论了这类系统的运动稳定性。分析结果表明，作为一个非线性元件，阻尼器可以在系统出现失稳时为系统提供更多的阻尼，从而延缓不稳定的发生，有时可导致系统在极限环状态下运行。 In order to analyze the instability of the rotor-damper-seal system under seal and the role of damper in suppressing the system instability, a linear form of the seal force was considered for a horizontally placed rotor model. The linear Dampers and nonlinear dampers. By solving the eigenvalues ​​of the integrated differential equations, the stability of the system is discussed. The analysis shows that, as a nonlinear element, the damper can provide more damping to the system in the event of system instability, thereby delaying the instability and sometimes causing the system to operate in the limit cycle.