| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a machining cost, while securing high sealing performance of a clearance between a casing and an impeller, in a fluid machine. <P>SOLUTION: Conduits 21, 22 are formed to a casing 14, a rotational shaft 12 is rotatably supported by the casing 14, and a runner 13 rotatable around and integral with the rotational shaft 12 is disposed to the conduits 21, 22. A first seal device 23 is disposed to a rotational clearance S1 between an inner peripheral face 14a of the first conduit 21 and an outer peripheral face 17a of the shroud 17 of the runner 13 downstream of the runner 13. A first seal part 34 in which a recess part 31 formed to the inner peripheral face 14a of the second conduit 22 is opposed to a projection part 32 formed to the outer peripheral face 17a of the shroud 17 at a first seal clearance S11 narrower than the rotational clearance S1, and a second seal part 35 in which the inner peripheral face 14a of the second conduit 22 is opposed to a cylindrical part 33 formed to a tip part of the shroud 17 at a second seal clearance S12 narrower than the rotational clearance S1 downstream of the first seal part 34, are provided. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
