| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump side case for reducing pressure loss, in a part where a rib is formed to connect a support component portion constituting at least a part of a support shaft part extending form an inner face of a curved part for rotatably supporting an impeller. SOLUTION: The pump side case 3 comprises: a curved part 3b whose cross-section is curved so that the inside diameter becomes smaller from an impeller housing part X side toward an inlet port 3e side; the rib 3g extending from the curved part 3b to a center axis side of the inlet port 3e; and a support part 3h that is a part of the support shaft part disposed to a tip of the rib 3g and arranged on the center shaft of the inlet port 3e for supporting the impeller member 5. The support part 3h is formed rather on the impeller housing part X side than the inlet port 3e side end part of the curved part 3b. The rib 3g extends straightly from the inlet port 3e side end part of the curved part 3b to the support part 3h, and a passage area of a rib part passage T constituted of the rib and the curved part 3b is set to be larger than the passage area of the inlet port 3e. COPYRIGHT: (C)2005,JPO&NCIPI
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