Dynamic vibration absorber based instability vibration suppression of a rotor/seal system
XU Qi1, NIU Junkai1, YAO Hongliang2, ZHAO Lichao3, WEN Bangchun2
1.School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China；
2.School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819,China；
3.Shenyang Blower Group Co., Ltd., Shenyang 110869,China
The dynamic vibration absorber (DVA) was proposed to suppress the instability vibration of a rotor/seal system.A model for the rotor/seal system with DVA was established.A numerical method was utilized to obtain the nonlinear characteristics of the rotor/seal system without and with DVA.The critical stability condition was obtained by the Routh-Hurwitz criterion.Then the genetic algorithm was applied to optimize the DVA parameters, and the stability was discussed.The results show that the DVA is effective to change the instability vibration frequency and threshold of the rotor/seal system.The instability vibration can be completely suppressed within a certain range of rotating speed.The DVA can reduce the amplitude of the instability vibration in some range of rotating speed, at which the instability vibration is partially suppressed.
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