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.
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April 2016
Research-Article
Experimental Evaluation of the Structure Characterization of a Novel Hybrid Bump-Metal Mesh Foil Bearing
Kai Feng,
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
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: kfeng@hnu.edu.cn
Search for other works by this author on:
Yuman Liu,
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
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: liuyuman@hnu.edu.cn
Search for other works by this author on:
Xueyuan Zhao,
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
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: xy_zhao@hnu.edu.cn
Search for other works by this author on:
Wanhui Liu
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
Manufacturing for Vehicle Body,
College of Mechanical and Vehicle Engineering,
Hunan University,
Changsha, Hunan 410082, China
e-mail: duozhu@yeah.net
Search for other works by this author on:
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
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
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
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
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. Apr 2016, 138(2): 021702 (9 pages)
Published Online: October 15, 2015
Article history
Received:
April 4, 2015
Revised:
August 17, 2015
Citation
Feng, K., Liu, Y., Zhao, X., and Liu, W. (October 15, 2015). "Experimental Evaluation of the Structure Characterization of a Novel Hybrid Bump-Metal Mesh Foil Bearing." ASME. J. Tribol. April 2016; 138(2): 021702. https://doi.org/10.1115/1.4031496
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