| 摘要 |
PROBLEM TO BE SOLVED: To provide an impeller superior in fluid delivering performance, by improving the fluid delivering quantity without changing the shape of a blade, and increasing a rotating speed. SOLUTION: A plurality (for example, five) of fluid control parts 7 respectively composed of a linear projection formed in parallel with the direction of a shaft 3 are formed on an outer peripheral face of a cup part 1 at axial symmetric equal positions to the shaft. Here, a radial dimension of each fluid control part 7 is determined to be 1/3 or less of a radial dimension of the blade 5, a dimension in the shaft direction of each fluid control part 7 is determined to be 1/3-6/5 of a dimension in the shaft direction of the cup part 1, and a width w in the circumferential direction of each fluid control part 7 is determined to be less than an clearance between the adjacent blades 5. Whereby the air flow can be controlled to increase the air blasting quantity be each fluid control part 7. COPYRIGHT: (C)2003,JPO
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