| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electro-corrosion preventing device of an underwater pump or an aeration/stirring device using the underwater pump capable of permanently providing an electro-corrosion preventing effect at a low cost by reducing a potential generated at a rotor part and a stator part at the time of driving motor without requiring a painting and a coating on the rotor part, etc. SOLUTION: A motor shaft 1 and a rotor part continued thereto and a bearing bracket 6 and a stator part continued thereto are electrically conducted through a conductive grease. A current flowing anode comprising a metal having a low potential is provided on a liquid-contact portion. An electro-corrosion phenomenon is not caused by reducing a potential generated at the rotor part and the stator part at the time or operation of underwater pump or the aeration/stirring device using the underwater pump.</p> |
