新型可动外环挤压油膜阻尼器减振特性研究

VIBRATION CONTROL OF A NEW MOVABLE OUTER-RING SQUEEZE FILM DAMPER

提出了一种新型可动外环挤压油膜阻尼器（ＭＲＳＦＤ），并从理论和实验上研究了ＭＲＳＦＤ对刚性转子系统稳态运转时的振动控制能力，结果表明，与传统挤压油膜阻尼器（ＳＦＤ）相比，ＭＲＳＦＤ能明显抑制双稳态跳跃等非线性振动现象的发生，具有良好减振特性。

A high efficient oil film damper,namely Movable outer Ring Squeeze Film Damper (MRSFD) is developed to meet the demands of modern gas turbine engines and other high speed rotating machinery on vibration control.By adding a flexible support outside,the outer ring of conventional Squeeze Film Damper (SFD) could be pushed under high oil forces caused by the squeezing motion of the journal.The vibration controllabilities of MRSFD and SFD are investigated and compared both theoretically and experimentally.It is proved that the nonlinear vibration characteristics such as jump phenomenon of SFD systems could be avoided under much greater unbalance level with MRSFD systems.As a novel oil film damper,MRSFD provides more effective vibration control for rotor systems and improves the unbalance loading ability of the damped supports.