| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pump capable of reducing influence of high cycle heat fatigue due to mixture of high temperature water and cooling water.SOLUTION: A pump includes: a rotational shaft 6 that rotates around an axis line O; a casing 2 that defines a gap S1 between itself and the rotational shaft 6 through which cooling water W2 circulates toward a lower side to be one side of the direction of the axis line O, and defines a lower space S2 in which high temperature water W1 higher than the cooling water W2 exists below the gap S1; and a cavity formation part 9 that is provided in the casing 2, and defines a cavity C between the lower space S2 and the gap S1.</p> |
