Coal mine main fan counter-rotating explosion-proof fan
The FBDCZ series (formerly BDK62 series) fans are large-scale coal mine explosion-proof axial flow fans developed based on the ventilation network parameters of China's coal mines. They offer high efficiency, energy saving, and low noise. The product's maximum static pressure efficiency can reach over 86%, matching the level of main fans used in Chinese mines. 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 entire fan's explosion-proof performance has been certified by 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 model employs a counter-rotating structure. The two impellers rotate in opposite directions, allowing for the elimination of the middle guide vanes and reducing their losses, thereby enhancing the fan's efficiency.
2. Utilizing a direct motor-to-impeller design, it eliminates transmission device damage incidents and reduces 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 main wind tunnel of the fan, which has a certain pressure resistance. This design isolates the motor from the gas-containing air in the fan's ducts and also serves as a heat dissipation mechanism. The housing features two rows of aerodynamic air ducts that connect to the ground atmosphere through the main wind tunnel, allowing fresh air to enter the housing while maintaining a positive pressure inside during the fan's operation.
4. The fan unit's static pressure efficiency can reach over 86%, with a wide high-efficiency range, ensuring the main fan efficiency in the three mining stages is above 75%. This reverses the low operation efficiency of large-scale Chinese mines' main fans, enabling significant energy savings.
5. The fan can be reversed for reverse airflow, with the reverse airflow reaching 60% of the normal airflow. No additional reverse air channel is required, offering the advantages of cost-saving in infrastructure investment and fast reverse air 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 free of humps, ensuring stable operation under any network resistance.
7. This series of fans operates stably with minimal vibration. Both the fan and the diffuser can be mounted on a flatbed truck with wheels, allowing for long-term continuous operation.
