0
Research Papers: Hydrodynamic Lubrication

Experimental Evaluation of the Structure Characterization of a Novel Hybrid Bump-Metal Mesh Foil Bearing

[+] Author and Article Information
Kai Feng

State Key Laboratory of Advanced Design and
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: kfeng@hnu.edu.cn

Yuman Liu

State Key Laboratory of Advanced Design and
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: liuyuman@hnu.edu.cn

Xueyuan Zhao

State Key Laboratory of Advanced Design and
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: xy_zhao@hnu.edu.cn

Wanhui Liu

State Key Laboratory of Advanced Design and
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: duozhu@yeah.net

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received April 4, 2015; final manuscript received August 17, 2015; published online October 15, 2015. Assoc. Editor: Daejong Kim.

J. Tribol 138(2), 021702 (Oct 15, 2015) (9 pages) Paper No: TRIB-15-1108; doi: 10.1115/1.4031496 History: Received April 04, 2015; Revised August 17, 2015

Rotors supported by gas foil bearings (GFBs) experience stability problem caused by subsynchronous vibrations. To obtain a GFB with satisfactory damping characteristics, this study presented a novel hybrid bump-metal mesh foil bearing (HB-MMFB) that consists of a bump foil and metal mesh blocks in an underlying supporting structure, which takes advantage of both bump-type foil bearings (BFBs) and MMFBs. A test rig with a nonrotating shaft was designed to estimate structure characterization. Results from the static load tests show that the proposed HB-MFBs exhibit an excellent damping level compared with the BFBs with a similar size because of the countless microslips in the metal mesh blocks. In the dynamic load tests, the HB-MFB with a metal mesh density of 36% presents a viscous damping coefficient that is approximately twice that of the test BFB. The dynamics structural coefficients of HB-MFBs, including structural stiffness, equivalent viscous damping, and structural loss factor, are all dependent on excitation frequency and motion amplitude. Moreover, they exhibit an obvious decrease with the decline in metal mesh density.

FIGURES IN THIS ARTICLE
<>
Copyright © 2016 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of HB-MFB

Grahic Jump Location
Fig. 2

Photograph of HB-MFB

Grahic Jump Location
Fig. 3

Test rig for the static load test

Grahic Jump Location
Fig. 4

Test rig for the dynamic load test

Grahic Jump Location
Fig. 5

Static load versus bearing displacement plots: (a) HB-MFB with a relative density of 36% and (b) BFB

Grahic Jump Location
Fig. 7

Results of the static load tests of HB-MFBs with different mesh densities (36%, 28%, and 20%): (a) static load versus bearing displacement and (b) structural stiffness versus bearing displacement

Grahic Jump Location
Fig. 6

Structural stiffness versus bearing displacement plots: (a) HB-MFB with a relative density of 36% and (b) BFB

Grahic Jump Location
Fig. 9

Dynamic force performance versus the excitation frequency with a motion amplitude of 12 m plots for HB-MFB with metal mesh densities of 36%, 28%, and 20%: (a) calculated dynamic structural stiffness, (b) equivalent viscous damping, and (c) structural loss factor

Grahic Jump Location
Fig. 10

Dynamic structural characteristics versus excitation frequency plots for the increasing motion amplitude of HB-MFB (28%): (a) structural stiffness, (b) equivalent viscous damping, and (c) structural loss factor

Grahic Jump Location
Fig. 8

Dynamic structural characteristics versus excitation frequency with a motion amplitude of 12 m plots for HB-MFB (36%) and BFB: (a) structural stiffness, (b) equivalent viscous damping, and (c) loss factor

Tables

Errata

Discussions

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 Journal Articles
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