FBDCZ series (formerly BDK62 series) coal mine axial flow fans, as large-scale explosion-proof fans designed based on our country's coal mine ventilation network parameters, boast the advantages of high efficiency, energy saving, and low noise. The product's installed static pressure efficiency can reach over 86%, meeting the level of domestic mine main fans. The materials used in these fans have passed the friction spark test at the Chongqing Branch of the China Coal Research Academy and meet explosion-proof requirements. The overall explosion-proof performance of the fans has passed the explosion-proof inspection of the National Quality Supervision and Inspection Center for Explosion-Proof Electrical Appliance Products.
Key Features:
1. To meet the resistance requirements of coal mine ventilation networks and ensure fan efficiency, this unit 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. The design features direct coupling of the motor and impeller, which 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 within an enclosed housing inside the fan's main air duct, which has a certain pressure resistance. This design isolates the motor from the gas-laden air within the fan's air passage, and also serves as a heat dissipation mechanism. The housing features two rows of aerodynamic air ducts, connecting the main air duct to the ground atmosphere. This allows fresh air to flow into the housing while maintaining a positive pressure inside during the fan's operation.
4. The blower's upper limit device achieves a static pressure efficiency of over 86%, with a broad high-efficiency range, ensuring the main fan efficiency in the mine's three mining stages is above 75%. This reverses the low operational efficiency of large-scale Chinese mines' main fans, saving a significant amount of electrical power.
5. The fan can be reversed for reverse airflow, with the reverse airflow reaching 60% of the normal airflow. No additional reverse airflow channel is required, offering the advantages of cost savings in infrastructure investment and rapid reverse airflow speed.
6. The blade installation angle of the impeller is adjustable, allowing for adjustments to 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, 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.
