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Optimal speed sharing characteristics of a series-hybrid bearing.A series-hybrid bearing assembly consisting of a conical hydrostatic fluid-film bearing and a ball bearing is described. Computer studies are used to predict friction torque and life characteristics of a 150-mm ball bearing. A conical hydrostatic fluid-film bearing is designed for minimum friction and maximum speed reduction of the ball-bearing component of the series-hybrid bearing. At a thrust load of 4000 lb and speeds corresponding to DN (bearing bore in millimeters times shaft speed in rpm) values of 3 and 4 million, ball-bearing speed may be reduced to 30%. This speed reduction corresponds to ball-bearing fatigue life improvement factors of 3.4 at 3 million DN and 5.9 at 4 million DN. An oil flow rate at 18.2 lb/min is required to maintain a fluid-film thickness of 0.001 in. in the hydrostatic bearing.
Document ID
19730029544
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nypan, L. J.
(San Fernando Valley State College Northridge, Calif., United States)
Scibbe, H. W.
Hamrock, B. J.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1972
Subject Category
Machine Elements And Processes
Report/Patent Number
ASME PAPER 72-LUB-39
Meeting Information
Meeting: International Lubrication Conference
Location: New York, NY
Country: US
Start Date: October 9, 1972
End Date: October 12, 1972
Sponsors: American Society of Mechanical Engineers, American Society of Lubrication Engineers
Accession Number
73A14346
Distribution Limits
Public
Copyright
Other

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