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Technical Briefs

Design and Experiment of Oil Lubricated Five-Leaf Foil Bearing Test-Bed

[+] Author and Article Information
H.-J. Xu1

Department of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P.R. Chinaxuhuaijin@tom.com

Z.-S. Liu, G.-H. Zhang, Y.-L. Wang

Department of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P.R. China

1

Corresponding author.

J. Eng. Gas Turbines Power 131(5), 054505 (Jun 09, 2009) (4 pages) doi:10.1115/1.3078703 History: Received August 25, 2008; Revised September 08, 2008; Published June 09, 2009

Multileaf foil bearing has various advantages including long-life, high-speed, low power loss, etc. Oil lubricated multileaf foil bearing compared with gas lubricated foil bearing is more favorable to greatly decrease foil performance requirements, foil surface coating technology, and foil processing. The special oil lubricated five-leaf foil bearing test-bed is designed and established, and a speed of 30,000 rpm is achieved primarily. The experiments including the influence of different radial clearances on rotor dynamical characteristics, speed run-up and coastdown, etc., are implemented on the test-bed. The experimental results indicate that oil lubricated multileaf foil bearing can offer high-speed, long-life, and lower friction loss. Radial clearance plays an important role to rotor dynamical characteristics. Moreover, oil lubricated multileaf foil bearing represents strong adaptive capacity of speed run-up and coastdown, and the capacity of withstanding impact and vibration.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Multileaf foil bearing configuration (o), journal foil (a), and thrust foil (b) design

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Figure 2

Structure of five-leaf foil bearing test-bed

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Figure 3

Bode diagrams in vertical motions at the nondrive (c) and drive (d) ends with a speed of 20,069 rpm

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Figure 4

Axis orbits at the drive end with speeds of 20,069 rpm (e) and 27,224 rpm (f)

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Figure 5

Waterfalls in vertical motion from 8000 rpm to 20,000 rpm (g) and from 21,000 rpm to 8000rpm (h) at the drive end

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Figure 6

Bode diagrams at the drive end with speeds of 20,134 rpm (q) and 30,368 rpm (s); radial clearance of 20 μm

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Figure 7

Axis orbits at the drive end with speeds of 20,134 rpm (u) and 30,368 rpm (v); radial clearance of 20 μm

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