To maintain a tip clearance between an impeller and a casing constant without providing a special mechanism and to reduce weight.
A recess 24 is provided along the circumferential direction in a back face (axial end face on a large diameter side) 23 of a disc 22. The recess 24 is formed so that a first deformation amount in which an end 27 on a discharge side of an impeller 20 is tilted to the axial downstream side of a rotational axis C when the impeller 20 is rotated at normal temperatures and at rated speed, and only centrifugal force is applied to the impeller 20, and a second deformation amount in which the end 27 on the discharge side of the impeller 20 is tilted to the axial upstream side of the rotational axis C when a heat source is placed on the side of the back face 23 of the disc 22 for generating a heat quantity equal to the heat quantity generated by a combustor during rated operation and only heat is applied to the impeller 20, are formed to be substantially equal.
| JP6693191 | Centrifugal pump |
| JP2017172418 | ROTARY MACHINE |
MITO RYOSUKE
KONDO MITSURU
IMAE TOMOHIRO
Kunio Ueda
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