Mitsubishi Heavy Industries Limited

Hiroomi Sakuma

Yasuhiro Ikeda

Hidekazu Uehara

Masaru Sakai

Yuji Harada

Akihiko Umeda

Hitoshi Ito

Takanobu Otani

Toshihiko Matsuo

Yasushi Takayama

Tomoki Hanada

Kentarou Saeki

Hiroshi Kuzumi

The shaft sealing structure includes a seal ring that has abutment portions formed by dividing the seal ring along the axial direction and that is provided around a main shaft in a ring-like manner; a support member that is provided in the seal ring along the circumferential direction of the main shaft; and a thermoswitch that is connected to the support member between the abutment portions and that presses the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during normal operation, in which the seal ring is fixed at a position separated from the main shaft during the normal operation and is moved by the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during the normal operation.

Shaft sealing structure and reactor coolant pump

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Tokyo, Japan

Hiroomi Sakuma