Title:
Nuclear reactor coolant pump
Document Type and Number:
Japanese Patent JP6086645
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nuclear reactor coolant pump capable of controlling circulation of pressurized water of high temperature and high pressure in abnormal circumstances.SOLUTION: A nuclear reactor coolant pump is provided with a rotary shaft 1, a housing which surrounds the rotary shaft 1, and a leakage preventing seal 30 which is installed so as to demarcate a gap between the rotary shaft 1 and the housing and controls the circulation of high temperature pressurized water in abnormal circumstances. The leakage preventing seal 30 includes: a C-shaped seal ring 31 extending in a circumferential direction of the rotary shaft 1 so as to surround the rotary shaft 1, and having a first end part 41 and a second end part 51 which face each other in the circumferential direction; and a thermal actuator 60 which is driven by the high temperature pressurized water as heat source and reduces a diameter of the seal ring 31 by bringing the first end part 41 and the second end part 51 close to each other.
Inventors:
Hideko Kafuku
Sakaguchi Yukihiro
Sakaguchi Yukihiro
Application Number:
JP2012014044A
Publication Date:
March 01, 2017
Filing Date:
January 26, 2012
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
F04D29/10; F04D7/08; F04D29/12; F04D29/14; G21C15/243
Domestic Patent References:
| JP2009524776A | ||||
| JP4062922U | ||||
| JP59068865U | ||||
| JP2003004145A |
Attorney, Agent or Firm:
Ryuichiro Mori
Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma
Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma