| 摘要 |
<p>The invention relates to a water aerating device, having a vertical shaft with a propeller, resting on three bearings, namely on an upper rolling friction bearing, an intermediary rolling bearing, having an adjustable position, and a sliding bearing. The rolling friction bearings comprise a bearing, a housing, a cover and two sealing elements, while the sliding bearing comprises a bush and an antifriction composition. The device also comprises a piston lubricator and two lubricating pipes, mounted inside the housing.</p> |
