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What is the difference between axial flow and explosion-proof axial flow fans?

Release Time：2021-07-20

In the use of flammable and explosive gas places, to avoid some flammable and easy to cause safety accidents, ordinary fans, usually used in no flammable and explosive places, explosion-proof axial flow fan and axial flow fan is the biggest difference between the material of the fan and the explosion-proof motor is not explosion-proof.
1. The motor is different: the motor used is different, and the explosion-proof fan must use an explosion-proof motor.
2. Impeller comparison: there are requirements on the material of the impeller and the material of the inner wall of the casing corresponding to the impeller. Axial flow fans are required not to generate sparks in case of collision. For example, aluminum blades and iron inner walls are used, or iron blades are used and aluminum rings are added to the inner walls.
3. The clearance between the impeller and the casing: The explosion-proof fan has a lower limit requirement for the clearance between the impeller and the casing, and the fan often has an upper limit requirement for the clearance in order to pursue efficiency, which is contradictory to each other.
4. Explosion-proof fans have stricter requirements for safety protection at the import and export ends.
5. The explosion-proof axial flow fan adopts the simplest structure of the fan with the direct connection of the motor and the impeller, which changes the current coal mine extraction axial flow ventilation and the complex structure of all axial flow fan belt drive or long shaft drive, which is conducive to operation and maintenance.

The axial flow fan has one of the following situations must be emergency shutdown.
1. Sudden sound changes occur during operation, the speed slows down, and phase-missing operation occurs.
2. The cable is overheated and the motor smells like glue.
3. The temperature of the motor housing exceeds 80 ℃.
In case of the above situation, just press the stop button to cut off the power supply, then "lock" and report to the mine on-duty leader. The axial flow fan is fenced at the entrance of the wind-off area. Therefore, it is necessary to grasp the situation during regular inspection. In case of emergency, corresponding treatment must be done.
It is well-known that axial flow fans play a great role in people's production career after all. In people's small-scale career, they cannot separate the application of fans. This can be seen from the application of axial flow fans of air conditioners. If air conditioners are separated from the sponsorship of axial flow fans, it is difficult to reach the desired consequences of air conditioners. The application of fans can be seen everywhere in their careers.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of FRP in China. The company has Grade II qualification for fire protection facilities engineering, Grade II qualification for construction mechanical and electrical installation engineering, Grade II qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, and an axial fan invention patent, A fan utility model patent, environmental assessment, safety assessment, three simultaneous and other procedures are complete.