北京航空航天大学学报 ›› 2000, Vol. 26 ›› Issue (2): 167-170.

• 论文 • 上一篇    下一篇

挤压油膜阻尼器失效的判据

刘方杰   

  1. 北京航空航天大学 动力系
  • 收稿日期:1998-09-14 出版日期:2000-02-29 发布日期:2010-09-27
  • 作者简介:刘方杰(1928-),男,四川蓬安人,教授,100083,北京.
  • 基金资助:

    航空科学基金资助项目(94B51089)

Bases of Judging the Failure of Squeeze Film Damper

LIU Fang-jie   

  1. Beijing University of Aeronautics and Astronautics,Dept. of Jet Propulsion
  • Received:1998-09-14 Online:2000-02-29 Published:2010-09-27

摘要: 挤压油膜阻尼器(简称SFD)设计不当,会导致功能失效.对弹支-挤压油膜阻尼器来说,失效有2种形式:一是过不了临界,即转子系统的振幅随转速的上升而一直增大;二是出现双稳态特性.2帧失效判据图已经作出:一是双稳态区域图,只要轴承参数和质量偏心率数组不选在双稳态区域内,便不致产生双稳态特性;二是减振失效边界图,只要前述数据组不在失效边界的一侧,便不致产生过不了临界的现象.经实验证明,上述结论从正反2个方面看都是正确的.实验也进一步确认了挤压油膜阻尼器优越的减振功能.

Abstract: If the design of squeeze film damper is not properly,it will be causing the failure of its functions. There are two cases of failure of the elastic support-squeeze film damper:one is the bistable character being take place,the other is unable to stride over the critical state,i.e.,the amplitude of the rotor system has been increasing with the rotating speed increasing. Two diagrams of judging the failures have been established. One is the bistable region diagram. Provided the data of the bearing parameter cooperated with the unbalance ratio do not be selected in that region,the bistable character will not be arising. The other is the failure boundaries diagram of attenuating vibration. Provided the above-mentioned data do not be selected at the side of failure boundaries,that will not be causing the phenomenon of unable to stride over the critical state. The result of experiment proves that the above conclusions are correct. This is observed from both positive and negative respect. By experiment, the excellent functions of attenuating vibration of squeeze film damper have also been affirmed still further.

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