Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Compressor Corporation

Daisuke Kawanishi

Akihiro Nakaniwa

Nobuyori Yagi

Hiroki Takagi

Hiroko Kitamoto

Shimpei Okayasu

An impeller including: blades disposed in a circumferential direction of the impeller; a disk located close to a second end side of an axis of the impeller with respect to the blades, to which the blades are attached, and configured to be attached to a rotating shaft; and a shroud located close to a first end side of an axis of the impeller with respect to the blades, and to which the blades are attached. Flow passages are formed by the blades, the disk and the shroud. The blades, the shroud and a first portion of the disk close to the second end side of the axis of the impeller are integrated so as to form a first member. A second portion of the disk close to the first end side of the axis of the impeller forms a second member.

Impeller, rotary machine including the same, and method for manufacturing impeller

A method for manufacturing a machine component includes a process of estimating post-heat-treatment strength for the intermediate form of a base material after a certain mechanical working process is performed, and a process of comparing the estimated strength with reference strength required for a final form. According to a result of the comparison, heat treatment of the base material is performed after one of the mechanical working processes is performed.

Method for manufacturing machine component, and rotary machine equipped with impeller manufactured by means of this method

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Tokyo, Japan

Daisuke Kawanishi