The DSSF series (two-speed) counter-rotating-type axial-flow tunnel ventilator is mainly used in high-speed rail, expressways, railway, diversion tunnels, metal mine tunnels, and other fields. The temperature of the conveying medium does not exceed 60 ° C. It is not more than 95 ± 3% (25 ° C) and is non-corrosive.

Structure and its characteristics

• The fan series has a current collector, a first fan, a secondary fan, a motor, a muffler, and the like. Steel plates weld the body and structure. The impeller is made of aluminum alloy die-casting. It is safe to use and easy to maintain.

• It adopts international advanced ternary flow aerodynamic theory and other high-tech design and manufacturing techniques, such as pulsing combined orthogonal blades and airfoil, which have advanced levels at home and abroad.

• It has a compact structure, low noise, high efficiency, excellent wind performance, high wind pressure, stable operation in the working area, and a wide application range. According to the tunneling surface's length and the roadway's different ventilation requirements, it can be used in the whole machine and in stages to reduce energy consumption. Energy conservation is the ideal equipment for local ventilation of tunnels in the midfield.

• Adopting an outsourced double-type muffling device with ultra-low noise and other characteristics and the sound-absorbing effect is good.

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