0
Research Papers: Gas Turbines: Structures and Dynamics

A General Purpose Test Facility for Evaluating Gas Lubricated Journal Bearings

[+] Author and Article Information
B. Ertas

Rotating Equipment Group, Vibration and Dynamics Laboratory, GE Global Research Center, 1 Research Circle, Niskayuna, NY 12309ertas@research.ge.com

M. Drexel

Rotating Equipment Group, Vibration and Dynamics Laboratory, GE Global Research Center, 1 Research Circle, Niskayuna, NY 12309drexel@crd.ge.com

J. Van Dam

Rotating Equipment Group, Vibration and Dynamics Laboratory, GE Global Research Center, 1 Research Circle, Niskayuna, NY 12309vandam@research.ge.com

D. Hallman

Rotating Equipment Group, Vibration and Dynamics Laboratory, GE Global Research Center, 1 Research Circle, Niskayuna, NY 12309hallman@crd.ge.com

J. Eng. Gas Turbines Power 131(2), 022502 (Dec 19, 2008) (8 pages) doi:10.1115/1.2979004 History: Received December 05, 2007; Revised June 22, 2008; Published December 19, 2008

The present work describes the detailed design and operational capabilities of a general purpose test facility developed to evaluate the dynamics and performance of gas lubricated journal bearings. The component level test facility was developed to serve as an initial tollgate test platform for certifying gas lubricated journal bearings into aircraft engine applications. A rotating test rig was engineered to test 70–120 mm diameter bearings at 40,000–80,000 rpm and 1200°F. The test rig described in this paper possesses design elements that enable the simultaneous application of dynamic and static load profiles of up to 1000 lb while monitoring and measuring the bearing torque. This capability allows for the characterization of several critical metrics such as bearing lift off speed characteristics, load capacity, and frequency dependent rotordynamic force coefficients. This paper discusses the functionality of the test facility and presents sample test measurements from several experiments.

FIGURES IN THIS ARTICLE
<>
Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Test facility layout (dimensions in millimeters)

Grahic Jump Location
Figure 2

Test rig cross section

Grahic Jump Location
Figure 3

Floating end and fixed end bearing pedestal cross sections

Grahic Jump Location
Figure 4

Air buffer seal design and oil mist flow path

Grahic Jump Location
Figure 5

Fixed-end rotor vibration: long rotor waterfall plot at 1200°F

Grahic Jump Location
Figure 6

Bearing housing installed in the test rig with the torque measuring device

Grahic Jump Location
Figure 7

Example start-up and shutdown bearing torque signature

Grahic Jump Location
Figure 8

Load capacity test setup

Grahic Jump Location
Figure 9

Load capacity test: example output

Grahic Jump Location
Figure 10

High temperature test setup: long rotor with the carriage housing assembly

Grahic Jump Location
Figure 11

Gas lubricated test bearing setup for rotordynamic characterization

Grahic Jump Location
Figure 12

Example X direction pseudorandom forced excitation measurements

Grahic Jump Location
Figure 13

Asynchronous rotordynamic force coefficients: example results

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