| タイトル | Experimental Characterization and Analytical Comparison of Rolling Element Bearing Radial Stiffness |
| 著者（英） | Earhart, Eric; Strong, Nunley; Darden, Mark; Chilcoat, Thaddeus; Becht, David |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 2010-05-12 |
| 言語 | eng |
| 内容記述 | Rocket engine turbopumps often employ rolling element bearings for rotor support. These bearings frequently provide the primary mechanical interface between the stationary and rotating parts, and are relied upon to provide an adequate stiffness characteristic to ensure small rotor deflection due to a variety of sources of radial load. The rotordynamic design of a turbopump, however, requires a more detailed understanding of the bearing's load-deflection characteristic, to accurately predict critical speed location and response. Accordingly, engineers have developed tools to predict the load-deflection relationship for rolling element bearings. These tools allow the engineer to account for rolling element bearing geometric parameters as well as operational parameters, many of which have been shown to significantly influence a bearing's force-deflection characteristics. To that end, a static test rig has been designed, built, and tested to experimentally measure the radial stiffness of a rolling element bearing in a realistic mounting configuration. The objective of this paper is to report these experimental results and provide a comparison to analytical predictions. |
| NASA分類 | Spacecraft Propulsion and Power |
| レポートNO | M09-0791 |
| 権利 | Copyright |
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