| タイトル | Optimal speed sharing characteristics of a series-hybrid bearing |
| 本文（外部サイト） | http://hdl.handle.net/2060/19720019878 |
| 著者（英） | Scibbe, H. W.; Hamrock, B. J.; Nypan, L. J. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1972-01-01 |
| 言語 | eng |
| 内容記述 | 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-millimeter 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-hydrid bearing. At a thrust load of 4000 pounds 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 by 30 percent. 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 of 18.2 pounds per minute is required to maintain a fluid-film thickness of 0.001 inch in the hydrostatic bearing. |
| NASA分類 | MACHINE ELEMENTS AND PROCESSES |
| レポートNO | 72N27528
E-6507
NASA-TM-X-68093 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/203084 |
