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

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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:

Edited by:

Kai Cheng, Yingxue Yao and Liang Zhou

Pages:

732-736

Citation:

Y. X. Yao et al., "Load Performances Analysis of Orifice Compensated High-Speed Externally Pressurized Spherical Gas Bearing", Applied Mechanics and Materials, Vols. 10-12, pp. 732-736, 2008

Online since:

December 2007

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$38.00

[1] D. Liu, Y.H. Liu and Sh.J. Chen: Externally Pressurized Gas Lubrication (Harbin Institute of Technology, China 1990) (in Chinese).

[2] J.J. Du, D. Liu and Y.X. Yao: Tribology, Vol. 22 (2002)No. 1, p.66 (in Chinese).

[3] Y.X. Yao, D.L. Qin, H.B. Zhang: Key Engineering Materials, Vol. 316 (2006), pp.860-863.

[4] Jerry C.T. Su, K.N. Lie: Tribology International, Vol. 36 (2003), pp.717-726.

[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.

[4] [10] × rpm.

[4] [10] × rpm.

[4] [10] × rpm.

[4] [10] Stiffness〔N·µm -1〕 ε.

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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.

[4] [10] × rpm.

[4] [10] × rpm.

[4] [10] × rpm.

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

[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.

[4] [10] × rpm.

[4] [10] × rpm.

[4] [10] × rpm.

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

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