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Tunnel / jet fan

  • SDF tunnel fan
SDF tunnel fan

SDF tunnel fan

  • Product description: The SDF tunnel fan is the first fan used in tunnel ventilation. The dust and gas in the tunnel cause the environment in the tunnel to be bad, which will affect the constructors. Tunnel fans solve this problem very well.
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SDF tunnel fan


Main performance characteristics of SDF tunnel fan

1. The SDF tunnel fan consists of two or more working motors, and the adjacent impellers rotate in relative directions. That is, the number of blades of the two stages is prime. The air is obtained from the energy of the first-stage impeller and then sent out after being supercharged by the second-stage impeller. In addition to increasing the airflow energy, the secondary impeller also has the function of static guide vanes in ordinary axial flow fans. While obtaining the straight velocity component in the circumferential direction, it straightens the airflow impact, increases the airflow energy, and reduces the wake vortex. To reduce noise.

2. During the whole working conditions within the range of the fan performance curve, the fan performance has been improved, the power of the two-stage impeller shaft is balanced, and the maximum power is equal. The key problem was solved: the power of the two-stage impeller shaft in the original pair of cyclones was unbalanced. When the pipeline resistance increased, the increase in the power speed of the second-stage shaft caused the shaft power of the impeller of this stage to be too large, which easily burned the motor.

3. Under various operating conditions, the wind pressure is relatively gentle, and the surge phenomenon is small. It also runs smoothly in areas with high wind pressure and small flow, and has a long distance to send air in the underground, and has strong adaptability to complex roadways. Focus on solving the problems of low efficiency, large energy consumption and high noise of the original pair of cyclones.

4. A new type of automatic switching explosion-proof anti-rotational axial flow local fan highlights the advantages of high wind pressure, long air supply distance, and easy switching.

Five, the main performance parameters of SDF tunnel fans

The main technical performance parameters of the fan are: air volume Q, full pressure P, full pressure efficiency η, noise LA, speed n, etc. For other parameters, see the performance parameter table for details.

The performance curve of the fan is based on the GB / T1236--2000 "Performance Test of Industrial Fans with Standardized Air Ducts". Standard air ducts are made and tested for performance, and converted into a temperature t = 20 ℃ and a density ρ = 1.2㎏ / m3, standard state data at atmospheric pressure p = 101325pa.

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