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Structural characteristics and principles of explosion-proof centrifugal fans

2021-04-13

Explosion-proof centrifugal fans are used in flammable and explosive gas places to avoid safety accidents caused by some flammable and explosive materials. In the application of explosion-proof centrifugal fan, when the conveying gas contains flammable and explosive substances, dust, smoke or fast volatile substances, when the fan is running, there are motor short circuits, line defects, and sparks caused by friction between the centrifugal fan impeller and its components. , It will ignite and detonate the transported substance or gas, which will constitute a serious safety accident and cause serious casualties and economic losses to the user unit.

A variety of explosion-proof axial flow and centrifugal special fans have outstanding performance and stable quality, and have been recognized by many in the market.

Explosion-proof centrifugal fans are used in places with flammable and explosive gases to prevent some flammable and explosive materials from causing safety accidents.

In the application of explosion-proof centrifugal fan, when the conveying gas contains flammable and explosive substances, legal dust, smoke or fast volatile substances, when the fan is in operation, there is a short circuit of the motor, a fault in the wiring, and the friction of the fan impeller and its components produces sparks. , It will ignite and detonate the transported substance or gas, which will cause a serious safety accident and cause serious casualties and economic losses to the user unit.

1. All fan parts in contact with gas must be non-ferrous materials. Aluminum parts are generally used and can work below 250 degrees Celsius.

2. The sealing ring at the impeller and shaft through hole of the fan must be made of non-ferrous materials. Generally use aluminum impeller or aluminum alloy casing. Can work below 250 degrees Celsius.

3. The structure of the fan must ensure that the impeller or shaft friction with its components will not produce sparks when the impeller or shaft is undesirably moved. The motor adopts an explosion-proof special motor that meets the requirements of national certification. Will emit high-temperature sparks and smoke.


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