Title:
ポンプ
Document Type and Number:
Japanese Patent JP6420701
Kind Code:
B2
Abstract:
A pump with a simple structure capable of suppressing contact between a balance disk and a balance seat is realized. A multistage pump 200 includes: a rotating shaft 1; impellers 2 mounted on the rotating shaft 1; a balance mechanism 70 for balancing the axial thrust acting on the rotating shaft 1; a pump casing 3 accommodating the impellers 2 and the balance mechanism 70; a balance pipe 75 for allowing communication between a balance space 73 in the pump casing 3 where the balance mechanism 70 is accommodated and a space on the fluid suction side of the pump casing 3; and a check valve 100 provided in the balance pipe 75 to allow fluid to flow through the check valve in only a direction from the balance space 73 toward the space on the fluid suction side.
Inventors:
Norihiko Hosoda
Akiko Otake
Kuniyasu Mori
Yokota Mitsuo
Akiko Otake
Kuniyasu Mori
Yokota Mitsuo
Application Number:
JP2015061256A
Publication Date:
November 07, 2018
Filing Date:
March 24, 2015
Export Citation:
Assignee:
Ebara Corporation
International Classes:
F04D29/041; B01D61/10; F04D1/08; F04D15/00; F04D29/60
Domestic Patent References:
| JP2013011241A | ||||
| JP2001140604A | ||||
| JP2008215307A | ||||
| JP10288184A | ||||
| JP2011074785A |
Attorney, Agent or Firm:
Shinjiro Ono
Toru Miyamae
Yukio Kanegae
Koichi Kushida
Takahiko Ieari
Toru Miyamae
Yukio Kanegae
Koichi Kushida
Takahiko Ieari