Hydrogen circulating pump

A circulating pump and hydrogen technology, applied in the direction of pumps, pump components, pump devices, etc., can solve the problems of polluting the hydrogen environment, difficult processing, complex structure, etc., and achieve the effects of avoiding hydrogen leakage, ensuring pressurization effect, and realizing miniaturization

CN113606163APending Publication Date: 2021-11-05杭州氢磁机电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-11-05

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Abstract

The invention relates to a hydrogen circulating pump. The hydrogen circulating pump comprises a pump shell and a rotating assembly located in the pump shell, the pump shell is composed of a cooling machine shell and a volute, the cooling machine shell and the volute jointly form an inner cavity used for containing the rotating assembly and sealed with the outside, the cooling machine shell and the volute are in gas phase communication, and the rotating assembly comprises a rotor shaft and an impeller. Suspension support is formed between the rotating assembly and the pump shell through a magnetic suspension bearing; and during working, the inner cavity is filled with a working medium, and the rotating assembly is suspended in the working medium. The pump has the advantages that the structure is simple, hydrogen sealing can be achieved, the rotating speed of the rotor shaft can be increased to guarantee the hydrogen pressurizing function, and therefore miniaturization can be achieved.
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Description

technical field

[0001] The invention relates to a hydrogen circulation pump. Background technique

[0002] The hydrogen fuel cell system needs to integrate the hydrogen circulation system to export the unreacted hydrogen in the fuel cell stack, and then re-introduce the hydrogen fuel cell stack to participate in the reaction with fresh hydrogen after being filtered and pressurized. The accumulated moisture and impurities are exported and can also wet the newly introduced hydrogen. At present, hydrogen circulation pumps or injectors are mainly used to pressurize this part of hydrogen and send it to the fuel cell again.

[0003] The centrifugal hydrogen circulation pump has high working efficiency and large flow rate, but requires a higher speed. Compared with air, hydrogen is more difficult to compress. The centrifugal hydrogen circulation pump must reach a higher speed to achieve effective compression of hydrogen. Therefore, the centrifugal hydrogen circulation pump also n...

Examples

Embodiment Construction

[0028] The present invention will be further described below according to the accompanying drawings and specific embodiments.

[0029] Depend on figure 1 , figure 2 and Figure 4 As shown, a hydrogen circulation pump of the present invention includes a pump casing and a rotating assembly located inside the pump casing. The pump casing is composed of a cooling casing 1 and a volute 2, and the cooling casing 1 and the volute 2 together form a unit for The inner cavity containing the rotating assembly and sealed with the outside world, the gas phase communication between the cooling casing 1 and the volute 2, when the hydrogen circulation pump of the present invention is working, the inner cavity of the pump casing is filled with working medium, and the rotating assembly is suspended in the working medium. Wherein, the rotating assembly includes the rotor shaft 3 and the impeller 31, and the rotor shaft 3 and the impeller 31 form a suspension support between the magnetic susp...