| 摘要 |
A dynamoelectric machine, such as a motor, has its rotor shaft journaled in antifriction bearings which are seated in an opening of the machine housing and are sealed from the interior and exterior of the machine by elastically deformable glide-ring structures, the bearing space communicating with the outside through lubricant injection and drainage duct means. A cover is rigidly mounted on the machine housing on the inner side thereof and coaxially surrounds the shaft. The cover and the shaft form together an annular air gap labyrinth having fixed parts mounted on the cover and rotatable parts fastened to the rotor shaft, the respective parts of the labyrinth seal straddling each other so that the effective length of the air gap is correspondingly extended. A glide-ring seal coaxially surrounds the shaft and is seated on the shaft to seal the extended air gap. |
