A facility and apparatus are described which determine stiffness, damping, and added-mass rotordynamic coefficients plus steady-state operating characteristics of high speed hydrostatic journal bearings. The apparatus has a current top speed of 29800 rpm with a bearing diameter of 7.62 cm (3 in.). Purified warm water, 55°C (130°F), is used as a test fluid to achieve elevated Reynolds numbers during operation. The test-fluid pump yields a bearing maximum inlet pressure of 6.9 Mpa (1000 psi). Static load on the bearing is independently controlled and measured. Orthogonally mounted external shakers are used to excite the test stator in the direction of, and perpendicular to, the static load. The apparatus can independently calculate all rotordynamic coefficients at a given operating condition.
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April 1994
Research Papers
A Test Apparatus and Facility to Identify the Rotordynamic Coefficients of High-Speed Hydrostatic Bearings
Dara Childs
,
Dara Childs
Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843
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Keith Hale
Keith Hale
Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843
Search for other works by this author on:
Dara Childs
Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843
Keith Hale
Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843
J. Tribol. Apr 1994, 116(2): 337-343 (7 pages)
Published Online: April 1, 1994
Article history
Received:
December 2, 1992
Revised:
July 14, 1993
Online:
June 5, 2008
Citation
Childs, D., and Hale, K. (April 1, 1994). "A Test Apparatus and Facility to Identify the Rotordynamic Coefficients of High-Speed Hydrostatic Bearings." ASME. J. Tribol. April 1994; 116(2): 337–343. https://doi.org/10.1115/1.2927226
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