Hydrogen circulating pump with explosion-proof structure

Abstract

The invention disclosed a hydrogen circulating pump with an explosion-proof structure, which comprises a motor, a gear chamber and a supercharger, wherein a gap is arranged between a driving rotor anda driven rotor in the supercharger, and nonmetal coatings are coated outside the driving rotor and the driven rotor; the supercharger shell and the parts corresponding to the driving rotor and the driven rotor are subjected to surface hard treatment; the rear bearing of the motor is isolated from the motor shell by non-metallic materials to isolate the conductivity between the rotors and the motor shell; a gap is arranged between rotors and a stator of the motor, and nonmetal coatings are coated outside the rotors and the stator. According to the invention, an improved design is carried out between the driving rotor and the driven rotor, and between bearing, the motor rotors and the stator which are components easy to generate sparks in a pump body, so that the situation that sparks are generated due to friction in the pump body is eliminated, the situation that explosion is caused due to contact of the sparks and hydrogen is fundamentally eliminated, the safety coefficient of the hydrogen circulating pump is greatly improved, and the basic requirements of safe production are met.

Description

Technical field: [0001] The invention relates to an explosion-proof structure hydrogen circulation pump. Background technique: [0002] Fuel cells generate electricity through the electrochemical reaction between combustible substances (hydrogen) and oxygen in the air. After the reaction of the fuel cell, the exhaust gas contains a large amount of hydrogen. If the hydrogen is directly discharged into the atmosphere, on the one hand It is a waste of energy. On the other hand, it pollutes the environment. The third is that hydrogen is flammable and explosive, which can cause danger. Therefore, the hydrogen needs to be recycled and reused. At present, the hydrogen-containing mixed gas is generally recycled to the fuel cell through a hydrogen circulation pump for recycling. [0003] In view of the special working environment of hydrogen circulating pumps, hydrogen circulating pumps have very high requirements on their own explosion-proof properties. The existing hydrogen circulating ...

AI Technical Summary

Problems solved by technology

[0003] In view of the special working environment of the hydrogen circulation pump, the hydrogen circulation pump has very high requirements on its own explosion-proof performance. However, the existing hydrogen circulation pump has poor explosion-proof performance. During use, after real-time detection of various parts, it is easy to have the following explosion-prone Where:

[0004] (1) Both the active rotor and the passive rotor in the pump body are made of metal, and friction will generate sparks when rotating, and the contact between the sparks and the hydrogen in the pump body will easily lead to dangerous situations such as explosion;

[0005] (2) The active rotor and passive rotor in the pump body are supported by bearings, and the bearings are also made of metal. The friction between the inner ring, outer ring and balls of the bearing will generate sparks, and the contact between the sparks and the hydrogen in the pump body will easily lead to dangers such as explosion. situation occurs;

[0006] (3) There is a certain degree of electrical conductivity between the motor rotor and the motor housing. The friction between the motor rotor and the stator will generate sparks. If hydrogen gas leaks from the supercharger into the motor, the sparks will also contact the hydrogen gas in the motor. It is easy to cause dangerous situations such as explosion;

[0007] (4) The friction between the supercharger housing and the active rotor, and the supercharger housing and the passive rotor will generate sparks, and the contact between the sparks and the hydrogen in the pump body will easily lead to dangerous situations such as explosions

[0008] In summary, once an explosion occurs, the consequences will be disastrous. Therefore, in the field of hydrogen circulation pumps, the above problems have become technical problems that need to be solved urgently in the industry

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