| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump having an extended life. SOLUTION: A main shaft 16 is rotatably supported in a casing 13 by ball bearings 14, 15, and the casing 13 has a suction opening 11 and a discharge opening 12. An impeller 17 is connected to a shaft end part of the main shaft 16, and the impeller 17 is structured to be driven and rotated by a canned motor 18 via the main shaft 16. A front shroud 44 is provided to the axial front side of the impeller 17 and a rear shroud 45 is provided to the axial rear side. An axially confronting predetermined axial gap 47 is formed between the casing 13 and the front shroud 44. Radially confronting seal parts 48, 49 are arranged between the casing 13 and the front shroud 44. COPYRIGHT: (C)2010,JPO&INPIT
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