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Single-structured hybrid gas-magnetic bearing and its rotordynamic performance

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Nonlinear Dynamics Aims and scope Submit manuscript

Abstract

This work proposes a novel hybrid gas-magnetic bearing (HGMB) which has single bearing structure. The gas bearing and the active magnetic bearing (AMB) share the same airgap, and the closed magnetic poles are taken as the bushing of the gas bearing. Controllable electromagnetic forces are applied to adjust system dynamic characteristics. Numerical results demonstrate better rotating accuracy, suppressed sub-synchronous vibration, lower energy consumption compared with rigid gas bearings and AMB, and less air friction losses than conventional HGMBs, indicating the suitability of the proposed bearing for cryogenic turbomachinery.

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Abbreviations

AMB:

Active magnetic bearing

AMD:

Active magnetic damper

C h :

Nominal airgap of the single-structured HGMB (m)

C g :

Nominal airgap of the rigid self-acting gas bearing (m)

FDM:

Finite difference method

FEM:

Finite element modeling

GFB:

Gas foil bearing

h min :

Minimum gas film thickness of the HGMB (m)

H :

Dimensionless gas film thickness (m)

HFMB:

Hybrid foil-magnetic bearing

HGMB:

Hybrid gas-magnetic bearing

Mode A:

Rigid gas bearing

Mode B:

Active magnetic bearing

Mode C:

Single-structured HGMB in aerodynamic mode

Mode D:

Single-structured HGMB in full hybrid mode

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Acknowledgements

The authors are grateful for the supports of the Program of the National Natural Science Foundation of China (No. 51836009) and research fund of State Key Laboratory of Technologies in Space Cryogenic Propellants.

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Authors and Affiliations

  1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Qing Liu & Li Wang

  2. Beijing Satellite Manufacturing Factory, 104 Youyi Road, Haidian District, Beijing, 100094, China

    Yuanyuan Li

  3. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing, 100028, China

    Gang Lei

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  1. Qing Liu
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  2. Li Wang
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  4. Gang Lei
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Correspondence to Li Wang.

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Liu, Q., Wang, L., Li, Y. et al. Single-structured hybrid gas-magnetic bearing and its rotordynamic performance. Nonlinear Dyn 104, 333–348 (2021). https://doi.org/10.1007/s11071-021-06295-5

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