| 摘要 |
PURPOSE: An underwater motor installed in a hot water circulating pump is provided to prevent an impeller from floating by closely adhering a carbon bearing to the end of a shaft through the tension of a leaf spring. CONSTITUTION: A hot water storage tank(10) stores hot water and heats the stored water. A shaft is combined with an impeller(18) by passing through a boss(15) protruded from the center of an impeller housing(14). A first metal ring(36) and a second metal ring are fitted between the shaft and the boss. A carbon bearing(32) is contacted with the upper side of the shaft. A leaf spring(34) elastically adheres the carbon bearing to the end of the shaft. |
