Corrosion-resistant vortex type hydrogen circulating pump

Abstract

Disclosed is a corrosion-resistant vortex type hydrogen circulating pump, comprising a motor shell, a bearing seat and a flow channel cover plate which are connected, wherein a motor cavity is formed between the motor shell and the bearing seat, an encapsulation stator, an anti-corrosion rotor and a motor shaft are arranged in the motor cavity, and the motor shaft is supported through bearings installed on the motor shell and the bearing seat; a pressurizing cavity is formed between the bearing seat and the flow channel cover plate, the motor shaft penetrates out of the bearing seat, extends into the pressurizing cavity and is provided with an impeller, a communicating hole for communicating the motor cavity with the pressurizing cavity is formed in the bottom of the bearing seat, and the communicating hole is used for keeping pressure balance between the motor cavity and the pressurizing cavity; and an annular flow channel is arranged in the flow channel cover plate, and an air inlet and an air outlet which communicate with the annular flow channel are formed in the flow channel cover plate. The encapsulation stator and the anti-corrosion rotor are high in corrosion resistance, so that hydrogen embrittlement and hydrogen corrosion of the outer surfaces of the encapsulation stator and the anti-corrosion rotor caused by the hydrogen-containing mixed gas are avoided, and corrosion caused by the fact that the hydrogen-containing mixed gas permeates into the encapsulation stator and the anti-corrosion rotor is also avoided.

Description

Technical field: [0001] The invention relates to a corrosion-resistant vortex type hydrogen circulation pump. Background technique: [0002] Fuel cells generate electrical energy through the electrochemical reaction between combustible substances (hydrogen) and oxygen in the air. After the fuel cell reacts, the exhaust gas contains a large amount of hydrogen. If these hydrogen are directly discharged into the atmosphere, on the one hand It is a waste of energy. On the other hand, it causes pollution to the environment. Third, hydrogen is flammable and explosive, which will cause danger. Therefore, it is necessary to recycle the hydrogen. At present, these hydrogen-containing mixed gases are generally circulated back to the fuel cell through a hydrogen circulation pump for recycling. [0003] The current hydrogen circulation pump mainly includes a connected motor housing, a bearing seat and a flow channel cover. A motor cavity is formed between the motor housing and the bear...

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies in the prior art, the present invention provides a corrosion-resistant vortex type hydrogen circulation pump, which solves the problem of poor anti-corrosion and explosion-proof effects of the motor stator and rotor in the past, and solves the pressure in the motor cavity and booster cavity in the past The problem of unbalance solves the problem that the bearing in the bearing seat is impacted by the high-pressure hydrogen-containing mixed gas in the past, which is easily damaged by wear and tear, and causes shutdown maintenance. question

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