| 摘要 |
PROBLEM TO BE SOLVED: To reduce loss by straightening flow in a passage of a vortex pump. SOLUTION: This vortex pump is provided with a casing 12 with a passage circumferentially formed inside, and a disk-shaped impeller 16 having a plurality of blades circumferentially disposed at equal spaces, and rotatably supported to the casing so that the blades 16a turn along the passage 28. A shroud ring 14 is disposed along the passage 28, and the radial cross section of the passage 28 is formed in annular shape. COPYRIGHT: (C)2004,JPO&NCIPI
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