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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Imbalance Response of a Rotor Supported on Flexure Pivot Tilting Pad Journal Bearings in Series With Integral Squeeze Film Dampers

[+] Author and Article Information
L. San Andrés, O. De Santiago

Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123

J. Eng. Gas Turbines Power 125(4), 1026-1032 (Nov 18, 2003) (7 pages) doi:10.1115/1.1492831 History: Received December 01, 2000; Revised March 01, 2001; Online November 18, 2003
Copyright © 2003 by ASME
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References

Figures

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Test rig for measurements of imbalance response of rotor supported on tilting pad bearings and squeeze film dampers
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Assembled ISFD and tilting pad bearing
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Predicted equivalent stiffness and damping synchronous force coefficients for tilting pad bearings and integral dampers, including supports flexibility. Drive and support.
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Summary of imbalance response of rotor supported on FPJBs. Measurement at rotor midspan (vertical direction). Locked ISFDs.
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Shaft centerline motion for test with no imbalance. Rotor supported on FPJBs in series with ISFDs. Drive end, static load: 247.3 N.
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Summary of imbalance response of rotor supported on series FPJB-ISFDs. Measurements at rotor midspan in the vertical and horizontal directions. ISFDs active.
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Measured first critical speed versus imbalance distance for tests on rotor supported on series FPJB-ISFDs
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Average peak-peak rotor response at first critical speed versus imbalance distance for rotor supported on FPJB-ISFDs. Vertical direction and horizontal planes.
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Comparison of predicted and measured horizontal synchronous response for 18.6 gram imbalance (u=49 microns). Measurements at rotor midspan (integral dampers active).

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