Explosion-proof Press-in Fans (FBD Series) Structure:

FBD series explosion-proof press-in ventilator adopts a counter-rotating double-motor structure, consisting of a collector, two-stage host unit (including impeller and motor), diffuser, and anechoic system. Its innovative design cancels the traditional guide vane device, using two-stage counter-rotating impellers to achieve airflow rectification and energy superposition.

Counter-rotating Power System:

Features a double motor direct connection drive. The first impeller rotates clockwise while the second rotates counterclockwise. The number of blades on the two impellers are prime numbers relative to each other (e.g., 7 and 11 blades), effectively destroying airflow pulsation and reducing aerodynamic noise. The motor protection class is IP55, insulation class F, capable of continuous operation under 40℃ ambient temperature.

Ternary Flow Impeller Design:

Blades are based on airfoil theory, adopting three-dimensional modelling of curved swept combination orthogonal type and hollow steel plate structure. Through CFD optimisation, impeller tip clearance is controlled within 0.5%D to reduce leakage loss. The high-efficiency zone covers 70%-130% of the rated flow rate.

Modular Muffler System:

The machine utilizes composite noise suppression technology, including an air intake resistive muffler, a 50mm thick ultra-fine glass wool sound insulation layer, and a diffuser guide grille. Measured noise levels are lower than 85dB(A), significantly improving the downhole sound environment.