NTRS - NASA Technical Reports Server

Back to Results
Cage stability analysis for SSME HPOTP bearingsA numerical model of cage motion (CAGEDYN) was used to analyze the stability of bearing cages in the Space Shuttle main engine (SSME) high pressure oxygen turbopump (HPOTP). The stability of existing bearing geometries, as well as perturbations of these geometries, was analyzed for various operating conditions. Results of the analyses show that some combinations of operating parameters, exacerbated by the sparse lubrication that exist in the HPOTP bearings, can cause unstable cage oscillations. Frequencies of cage oscillations were predicted by the CAGEDYN numerical model by Fourier analysis of predicted cage motions. Under conditions that cause unstable cage motion, high frequency oscillations were predicted that could cause premature cage failures.
Document ID
Document Type
Conference Paper
Merriman, T. L.
(Battelle Columbus Labs. OH, United States)
Kannel, J. W.
(Battelle Columbus Labs. OH, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1988
Publication Information
Publication: NASA, Marshall Space Flight Center, Advanced Earth-to-Orbit Propulsion Technology 1988, Volume 1
Subject Category
Mechanical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available