Hitachi, Ltd.

Mitsubishi Heavy Industries Limited

Takanobu Otani

Norifumi Nishikawa

Yasuhiro Ikeda

Yasuharu Namba

Hirotaka Mizuno

Hitoshi Ito

Toshihiko Matsuo

Yasushi Takayama

Tomoki Hanada

Hiroshi Kuzumi

Shoichi Minami

Hidekazu Uehara

Masaru Sakai

Yuji Harada

Akihiko Umeda

Kentarou Saeki

Hiroyuki Tokumasu

Hiroomi Sakuma

A multistage shaft sealing apparatus includes a first sealing unit, a second sealing unit, and a third sealing unit provided, in a sequential order from a side of the apparatus closer to inside of the apparatus, in a fluid leakage passage formed between the rotating shaft or the rotating member and a housing located to surround the rotating shaft or the rotating member. The first sealing unit includes a first runner and a first sealing ring which form a non-contact-type sealing surface; the second sealing unit includes a second runner and a second sealing ring which form a contact-type sealing surface; the third sealing unit includes a third runner and a third sealing ring which form a contact-type sealing surface, and a purge water supply passage supplying purge water to the third sealing unit and a purge water discharge passage discharging the purge water supplied to the third sealing unit.

Multistage shaft sealing apparatus and rotary machine

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

A data access method in an information system including a plurality of data utilization systems connected to a network N, and a plurality of data provision systems connected to a network, wherein a data utilization system transmits a request for utilizing data in a data provision system to another data utilization system Pthrough the network N, the data utilization system, upon receipt of the data utilization request, transmits a processing execution request corresponding to the data utilization request to the data provision system through the network N, the data provision system, upon receipt of the execution request, executes processing corresponding to this execution request and transmits necessary data to the data provision system through the network, and the data provision system receives the data and stores the same.

Information system and data access method

Growing community of inventors

Tokyo, Japan

Takanobu Otani