Title:
SEAL DEVICE FOR PUMP, AND PRIMARY COOLANT PUMP
Document Type and Number:
Japanese Patent JP2019044685
Kind Code:
A
Abstract:
To keep a sealing function around a pump shaft even when high-temperature and high-pressure fluid reaches after SBO occurs.SOLUTION: A seal device for a pump in some embodiments comprises a first member, a second member arranged opposite to the first member and having a ring groove, a ring member provided in the ring groove, and a backup ring provided in the ring groove on a low-pressure side to the ring member, and made of a material with a thermal expansion coefficient larger than that of the second member. A gap between the backup ring and the first member is formed larger than a gap between the backup ring and a bottom face of the ring groove.SELECTED DRAWING: Figure 1
Inventors:
HISAI OSAMU
TOKUMASU HIROYUKI
MATSUO TOSHIHIKO
OTANI TAKANOBU
IKEDA YASUHIRO
KUZUMI HIROSHI
NAGO NORIHIRO
MURA YOSHIHIRO
TOKUMASU HIROYUKI
MATSUO TOSHIHIKO
OTANI TAKANOBU
IKEDA YASUHIRO
KUZUMI HIROSHI
NAGO NORIHIRO
MURA YOSHIHIRO
Application Number:
JP2017167918A
Publication Date:
March 22, 2019
Filing Date:
August 31, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
EAGLE IND CO LTD
EAGLE IND CO LTD
International Classes:
F04D29/14; F04D7/08; F04D29/12; F16J15/18
Domestic Patent References:
| JPH03114672U | 1991-11-26 | |||
| JP2011153653A | 2011-08-11 | |||
| JPS611776U | 1986-01-08 | |||
| JP2010133511A | 2010-06-17 | |||
| JPS6192368A | 1986-05-10 | |||
| JPS6322397U | 1988-02-15 | |||
| JP2013151930A | 2013-08-08 |
Attorney, Agent or Firm:
Seishin ip patent business corporation