挤压油膜阻尼器失效问题分析

说明了研究挤压油膜阻尼器(简称SFD)减振失效的意义.首先,介绍了国际上研究SFD的J.W.Lund、E.J.Hahn、R.Holmes、R.A.Cookson和E.J.Gunter等五个学术集团,归纳出他们谈论到的有关挤压油膜阻尼器失效的观点,特别着重指出了挤压油膜阻尼器失效的不正确设计.失效的现象是过不了临界和导致转子支承系统产生双稳态特性.避免失效的方法是:调整油膜间隙与不平衡量间的关系,应用全油膜,限制不平衡量和采用弹性支座.本文的结论是:假如设计参数选择不当,挤压油膜阻尼器不仅不能减振,反而会导致转子支承系统工作不稳定或过不了临界.

Analysis Failures on Attenuating Vibration of Squeeze Film Damper

The meaning of study the failure of attenuating vibration of the squeeze film damper is detailed.First,the achievement in scientific research accomplished by J.W.Lund,E.J.Hahn,R.Holmes,R.A.Cookson and E.J.Gunter five academic groups for study the squeeze film damper in international is compendiously reviewed.The talks about the failure on attenuating vibration of squeeze film damper for them are concluded.Specially the reasons of failure of squeeze film damper caused by its not proper design are emphalically point out.The phenomena of failure are not going across the critical speed of a rotor,and causing the rotor bearing system to produce a bistable characteristic.The methods to avoid the failure have:to adjust the relationship between the radial clearance and the unbalance,applied the full film,to use flexible bearing housing and limited the unbalance.The conclusion of this paper is if the design parameters are not properly selected is not only unable to attenuate vibration but also cause the operation of rotor system unstable or unable to stride over critical state.