| 摘要 |
PURPOSE:To enhance the efficiency of a blower, by forming plural rotors in a hollow type and a discharge groove, which discharges fluid taken into from a fluid intake hole, in the rotor and driving it by a timing set gear. CONSTITUTION:Plural rotors 3, formed into hollow shape, are driven by a timing set gear 21 in a casing 2 feeding out fluid. The rotor 3 forms a discharge groove 10, which discharges fluid taken into from a fluid intake hole 7, in a direction of the rotor 3 in its axial line. The timing set gear 21 forms its gear part movable in the direction of rotation for a boss part 23. Accordingly, the fluid to be fed is prevented from its leakage from a clearance in a slide contact part of the rotor by enabling the fluid to be discharged from a discharge groove 9 by rotating the rotor 3 with centrifugal force.
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