| 摘要 |
A submersible electric pump for polluted waters has electric motor with gasket by shaft, this is equipped at outside with a case for water supply there, this cools the electric motor, and a pump connected and placed at one shaft with it. The cavity in which the gasket is placed is connected to the cavity of the case, for instance through openings in the lower support of the electric motor, through those water is supplied there under pressure that exceeds the pressure of polluted water in front of it formed by the pump. |
