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Load Performances Analysis of Orifice Compensated High-Speed Externally Pressurized Spherical Gas Bearing

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Abstract:

The influence of parameters to load performances of a high-speed externally pressurized spherical gas bearing compensated by two-rows of orifices has been studied numerically based on finite element method (FEM). Reynolds equation governing the flow field in the clearance space in spherical coordinates system is transformed into a analogous style in Descartesian coordinates by parameter substitution, and Galerkin weighted residual method is applied to reduce the order of derivatives of the transformed equation. Pressure distribution on the gas-film is obtained by solving of the equation. On the basis of theories, influences of rotating speed, nominal gas-film thickness and supplying pressure to load carrying capacity and stiffness are analyzed. Comparison of performances between hydrostatic and hybrid state of the bearing has also presented.

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Periodical:

Applied Mechanics and Materials (Volumes 10-12)

Pages:

732-736

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.10-12.732

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Online since:

December 2007

Authors:

Ying Xue Yao, Dong Li Qin, L. Zhou

Keywords:

Finite Element Model (FEM), Hybrid, Load Performance, Spherical Gas Bearing

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

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[10] [20] [30] 0. 1 0. 3 0. 5 0. 7 0. 9 0. 025mm 3 0. 025mm 0 0. 035mm 3 0. 035mm 0 × rpm.

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[4] [10] × rpm.

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[4] [10] × rpm.

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[4] [10] × rpm.

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[4] [10] Stiffness〔N·µm -1〕 ε.

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0. 5.

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[1] 1. 5 0. 1 0. 3 0. 5 0. 7 0. 9 0. 025mm 3 0. 025mm 0 0. 035mm 3 0. 035mm 0× rpm.

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[4] [10] × rpm.

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[4] [10] × rpm.

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[4] [10] × rpm.

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[4] [10] Dimensionless load ε Fig. 9 Influence of supply pressure to radial load performances.

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[10] [20] [30] 400. 1 0. 3 0. 5 0. 7 0. 025mm 3 0. 025mm 0 0. 035mm 3 0. 035mm 0 ε × rpm.

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[4] [10] × rpm.

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[4] [10] × rpm.

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[4] [10] × rpm.

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[4] [10] Stiffness〔N·µm -1〕 Fig. 10 Influence of supply pressure to axial load stiffness.

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