| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the speed of an impeller from decreasing even when thrust balance temporarily breaks down and the impeller and a casing come into contact with each other, in a magnetic coupling pump including the encapsulated-type impeller, and the casing for covering the impeller so that the impeller can rotate about a rotational axis and move in the direction of the axis that extends from the rotational axis. <P>SOLUTION: Tapered surfaces 24 and 55 are formed on at least a portion of at least one-side surfaces of surfaces 24 and 53 of the impeller 10 and surfaces 66 and 86 of the casing 60 facing each other in the axis direction Da so that the interval between the surfaces gradually changes progressively in the radial direction Dr perpendicular to the axis direction Da. <P>COPYRIGHT: (C)2013,JPO&INPIT |
