Anti-corrosion and anti-explosion vortex type hydrogen circulating pump

Abstract

Disclosed is an anti-corrosion and anti-explosion vortex type hydrogen circulating pump, comprising a motor shell, an impeller shell and a bearing seat which are connected, wherein a motor cavity is formed between the motor shell and the impeller shell, an encapsulation stator, an anti-corrosion rotor and a motor shaft are arranged in the motor cavity, the two ends of the motor shaft are supported through bearings installed on the motor shell and the bearing seat, the motor shaft is in clearance fit with the impeller shell and used for keeping pressure balance between a motor cavity and a pressurizing cavity. An impeller installed on the motor shaft is arranged in the pressurizing cavity, a communicating hole for communicating the motor cavity with the pressurizing cavity is formed in the bottom of the impeller shell, an annular flow channel is formed in the bearing seat, and an air inlet and an air outlet which communicate with the annular flow channel are formed in the bearing seat. The axial balance force of the motor shaft is good, the operation is more stable and reliable, the encapsulation stator is anti-corrosion and anti-explosion, the anti-corrosion rotor is high in corrosion resistance, hydrogen embrittlement and hydrogen corrosion of the outer surfaces and the interiors of the encapsulation stator and the anti-corrosion rotor caused by hydrogen-containing mixed gas are avoided, and normal work of the hydrogen circulating pump is guaranteed.

Description

Technical field: [0001] The invention relates to an anti-corrosion and explosion-proof 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 hous...

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies in the prior art, the present invention provides an anti-corrosion and explosion-proof vortex type hydrogen circulating pump, which solves the problem of poor anti-corrosion and explosion-proof effect 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. problem, which solves the problems of poor axial balance force and poor running stability of the motor drive shaft in the past

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