弹性环式挤压油膜阻尼器减振机理研究

STUDY ON VIBRATION DAMPING MECHANISM OF AN ELASTIC RING SQUEEZE FILM DAMPER

研究了弹性环式挤压油膜阻尼器（ＥＲＳＦＤ）减振机理，以ＥＲＳＦＤ和转子轴颈的受力和运动分析为基础，从广义不可压Ｒｅｙｎｏｌｄｓ方程出发建立ＥＲＳＦＤ减振机理模型，推导出了描述ＥＲＳＦＤ减振机理模型的微分方程，并由ＥＲＳＦＤ与ＳＦＤ的减振机理模型分析了它们各自的特点，指出了ＳＦＤ仅是ＥＲＳＦＤ的特殊情形。ＥＲＳＦＤ既有优良的减振特性又有很好的调频功能。

The vibration reduction mechanism of the Elastic Ring Squeeze Film Damper (ERSFD) is investigated.Based on the analyses of forces and motions acting on the journal of a rotor-support system with ERSFD and generalized incompressible Reynolds Equation,the model and differential equations of the vibration reduction mechanism of an ERSFD are set up.The features of the vibration reduction for both ERSFD and SFD are considered and compared.It is found out that SFD is only the special example of ERSFD.Theoretical analysis reveals that ERSFD has a very good dynamic characteristics and can be used for both reducing vibration and retuning the frequencies (critical speeds) of the rotor-support system.