Title:
PUMP DEVICE, PUMP SYSTEM, AND PUMP SYSTEM OPERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/053249
Kind Code:
A1
Abstract:
Provided are a pump device that is free from leakage of liquid hydrogen into an external environment and suitable for high-speed rotation than a pump in which a rotor is liquid-sealed, a pump system, and a pump system operation method. A pump device 2, 2A according to the present invention is connected to a storage tank T1 in which liquid hydrogen and hydrogen gas formed by vaporization of the liquid hydrogen are stored, and feeds the liquid hydrogen. The pump device comprises: a rotating shaft 31; a motor M that rotates the rotating shaft; an impeller 41 that is attached to a front end part 31a of the rotating shaft; housings 30 and 40 that have a motor chamber 36 in which the motor is accommodated and a pump chamber 43 in which the impeller is accommodated, respectively; and a mechanical seal 42 that is attached to the rotating shaft and the housings and seals the motor chamber with respect to the pump chamber. The motor includes a rotor 34 that is attached to the rotating shaft, and a stator 35 that is directly opposed to the rotor in a radial direction of the rotating shaft and rotates the rotor. The hydrogen gas is introduced into the motor chamber.
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Inventors:
KUBOTA YASUSHI (JP)
Application Number:
PCT/JP2023/026022
Publication Date:
March 14, 2024
Filing Date:
July 14, 2023
Export Citation:
Assignee:
NIKKISO CO LTD (JP)
International Classes:
F04D7/02; F04D29/58
Foreign References:
| JP2020060103A | 2020-04-16 | |||
| JP2001173598A | 2001-06-26 | |||
| JPS62159795A | 1987-07-15 | |||
| JPS4723492B1 | ||||
| US20130343932A1 | 2013-12-26 | |||
| CN108512360A | 2018-09-07 |
Attorney, Agent or Firm:
NISHIMURA Keiichi (JP)
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