| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a drainage pump preventing influence on axial thrust of an impeller. <P>SOLUTION: The drainage pump 1 includes a motor 10, a rotary shaft 24 rotated by the motor 10, a plurality of impellers 61, 62 connected with the rotary shaft 24, and a casing 40 for storing the plurality of impellers 61, 62. The plurality of impellers 61, 62 each have at least one blade 73 displaced in a rotating direction. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
