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High pressure oxygen turbopump bearing cage stability analysesThe low service life of the high pressure oxygen turbopump (HPOTP) bearings used in the space shuttle main engine was examined by use of the Battelle "BASDAP' bearing computer stability model. The dynamic instability of the bearing cage resulted in excessive wear and eventual failure of the unit. By maintaining a cage/race clearance of no more than 0.25 millimeters (0.010 inches), ball/pocket clearance of no less than 0.54 millimeters (0.025 inches), dynamic balancing of the cages, and maintaining adequate lubricant films between the balls and races, cage instability and subsequent bearing degradation can be reduced.
Document ID
19840011747
Document Type
Contractor Report (CR)
Authors
Merriman, T. L.
(Battelle Columbus Labs. OH, United States)
Kannel, J. W.
(Battelle Columbus Labs. OH, United States)
Date Acquired
September 4, 2013
Publication Date
March 8, 1984
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-CR-170991
NAS 1.26:170991
Accession Number
84N19815
Funding Number(s)
CONTRACT_GRANT: NAS8-34908
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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