The FBDCZ series (formerly BDK62 series) axial flow explosion-proof fans for coal mine main fans are large-scale explosion-proof fans developed based on the ventilation network parameters of our country's coal mines. They offer high efficiency, energy saving, and low noise. The static pressure efficiency of the product can reach above 86%, meeting the level of mine main fans in China. The materials used in these fans have passed the friction spark test at the Chongqing Branch of the China Coal Research Academy and meet the explosion-proof requirements. The overall explosion-proof performance of the unit has passed the explosion-proof inspection of the National Explosion-Proof Electrical Appliance Product Quality Testing Center.

Key Features:

1. To meet the resistance requirements of coal mine ventilation networks and ensure fan efficiency, this unit employs a counter-rotating structure, with the two impellers rotating in opposite directions. This design eliminates the need for a middle guide vane and reduces its losses, thereby enhancing the fan's efficiency.

2. Direct motor-to-impeller connection design minimizes transmission damage accidents and eliminates energy loss in the transmission system, thereby enhancing the efficiency of the fan unit.

3. Motors are all installed in an enclosed housing within the fan's main air duct, which has certain pressure resistance. This housing isolates the motor from the gas-containing air in the fan's air passages and also serves as a heat dissipation device. The housing features two rows of aerodynamic air ducts that connect to the ground atmosphere via the main air duct, allowing fresh air to flow into the housing. Additionally, it maintains a positive pressure inside the housing during the fan's operation.

4. The blower's upper limit device static pressure efficiency can reach over 86%, with a wide efficient range, ensuring the main fan efficiency in the mine's three mining stages is above 75%. This reverses the low operation efficiency of large-scale Chinese mines' main fans, capable of saving a significant amount of electrical energy.

5. The fan can be reversed for reverse airflow, with a reverse airflow capacity of up to 60% of the normal airflow. No additional reverse airflow channel is required, offering the advantages of cost-saving in infrastructure investment and fast reverse airflow speed.

6. The blade installation angle of the impeller is adjustable, allowing for adjustment of the blade angle according to production requirements. This fan features a special design with a performance curve without a hump, ensuring stable operation under any network resistance.

7. This series of fans operates stably with minimal vibration, and both the fan and the diffuser can be mounted on a flatbed cart with wheels for easy movement. They are designed for long-term continuous operation.