Explosion-proof Press-in Fans (FBD Series) Structure:
- Innovative Design: Adopts counter-rotating double-motor structure consisting of a collector, two-stage host unit, diffuser, and anechoic system. It eliminates traditional guide vanes, using energy superposition for better airflow.
- Power System: Direct connection drive with counter-rotating impellers (clockwise and counterclockwise). Blades are prime numbers to each other (e.g., 7 and 11) to minimize airflow pulsation and aerodynamic noise.
- Impeller Design: Ternary flow impeller based on airfoil theory. CFD optimization keeps tip clearance within 0.5%D, ensuring high efficiency between 70%-130% of rated flow.
- Acoustic Control: Features a modular muffler system with resistive intake mufflers and 50mm thick ultra-fine glass wool insulation. Noise levels are kept below 85dB(A).
Frequently Asked Questions (FAQ)
What is the protection rating of the FBD series motor?
The motor protection class reaches IP55 with an insulation class of F, suitable for continuous operation in ambient temperatures up to 40℃.
How does the counter-rotating design benefit underground mining?
The two-stage counter-rotating impellers achieve superior airflow rectification and energy superposition, increasing pressure and efficiency compared to traditional single-stage fans.
Is the noise level suitable for deep mining environments?
Yes, the composite noise suppression technology and modular muffler system ensure the measured noise is lower than 85dB(A), significantly improving the downhole sound environment.
What materials are used for the fan blades?
The blades utilize a three-dimensional curved swept combination orthogonal type and hollow steel plate structure for maximum durability and aerodynamic performance.
Can the airflow and pressure be customized?
The FBD series offers a wide range of models (from FBDNo5.0 to FBDNo11.0) with varying power options from 2x5.5kw to 2x75kw to meet different ventilation requirements.
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