| 摘要 |
<p>The service life of turbomolecular pumps comprising rotors that are mounted on mechanical rolling bearings, is frequently limited by the rolling bearings. In order to increase the service life of the rolling bearings, according to the invention a bearing cage (12) is provided, which, in addition to the openings (14) that are used to receive rolling elements, comprises recesses (18) for providing lubricant. The recesses are open at least partially in the direction of the rolling element opening.</p> |
