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Vibration characteristics of the HPOTP (High Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Engine)A review is presented of various rotordynamic problems which have been encountered and eliminated in developing the current flight engines, and continuing subsynchronous problems which are being encountered in developing a 109% power level engine. The basic model for the High Pressure Oxygen Turbopump (HPOTP) of the SSME including the structural dynamic model for the rotor and housing and component models for the liquid and gas seals, turbine-clearance excitation forces, and impeller-diffuser forces are discussed. Results from a linear model are used to examine the synchronous response and stability characteristics of the HPOTP, examining bearing load and stability problems associated with the second critical speed. Various seal modifications are examined and shown to have favorable consequences with respect to bearing reactions and stability.
Document ID
19850018584
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Childs, D. W. (Texas A&M Univ. College Station, TX, United States)
Moyer, D. S. (Texas A&M Univ. College Station, TX, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA. Marshall Space Flight Center Advan. High Pressure O2(H2 Technol
Subject Category
Structural Mechanics
Accession Number
85N26895
Funding Number(s)
CONTRACT_GRANT: NAS8-34505
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19850018551Collected WorksAdvanced High Pressure O2/H2 Technology
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