| 摘要 |
PROBLEM TO BE SOLVED: To provide a fan capable of realizing a stable rotation in its rotation part, lessening the deviation of a balance weight by improving a fan mechanism, and efficiently obtaining a high wind pressure. SOLUTION: A double-sided D-cut part formed on the contour of a shaft 7 and the double-sided D-cut holes formed on a yoke 6 and auxiliary fans 10 and 11 are fixed in an axial direction by a nut 13 with spacers 12 as a filler piece. The shaft 7 and the main fans 14 and 15 are similarly fixed by a nut 18 with spacers 17 as a filler piece. Further, a static vane 16 is arranged by attaching to a housing 1 between both main fans 14 and 15 without engaging with the shaft 7. The reverse V-shaped folding parts are formed on the outer peripheries of the main fan 15 and the auxiliary fan 11, and a weight for balancing is loaded on the folded inner side in order to correct the unbalance of weight.
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