0

Full Content is available to subscribers

Subscribe/Learn More  >

Vibration Isolation of Rotating Machinery by Parameters Switched Magnetic Bearing and High Static Low Dynamic Stiffness Supports

[+] Author Affiliations
Yanhui Ma, Yixin Su, Suyuan Yu

Tsinghua University, Beijing, China

Paper No. GT2018-76535, pp. V07BT34A038; 10 pages
doi:10.1115/GT2018-76535
From:
  • ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
  • Volume 7B: Structures and Dynamics
  • Oslo, Norway, June 11–15, 2018
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5114-2
  • Copyright © 2018 by ASME

abstract

Vibrations in rotating machinery cause many problems such as excessive noise and the vibration transmission to the supporting structure. In addition, the vibration isolation of the machinery with a wide range of rotational speed is a vital requirement and different to realize in practical engineering. As one of the key components in rotating machinery, bearing is not only the major vibration excitation source, but also the main vibration transmission path. Therefore, the mechanical property of the bearing has a significant effect on the vibration of the rotating machinery. Compared with traditional mechanical bearing, the equivalent stiffness and damping of magnetic bearing can be changed by adjusting its control parameters. On this basis, a novel design strategy of parameters switched magnetic bearing and high static low dynamic stiffness (HSLDS) supports for the vibration isolation of rotating machinery is proposed in this article. The design changes the equivalent linear stiffness and damping of the magnetic bearing by adjusting the control parameters according to the rotor speed, which will improve the vibration isolation capability of magnetic bearing at different rotor speed. Meanwhile, to further reduce the vibration transmission, the rotating machinery was suspended by nonlinear isolator with high static low dynamic stiffness characteristic. As an example, a rotating machinery system consisting of a rigid rotor supported by parameters switched magnetic bearings and high static low dynamic stiffness supports is studied. In this model, the rotor is excited by the unbalance force with different rotational speed. The amplitude of force acted on the base and the maximum relative displacement between the journal and the bearing are used to judge the isolation performance. Simulation results show that the demonstrated the effectiveness of this design strategy and the force transmission is significantly reduced with a wide rotational speed range.

Copyright © 2018 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In