SDS Tunnel Jet Fan Model Parameters 

SDS Tunnel Jet Fan Model Parameters

I. Overall Structure of SDS Tunnel Jet Fan
1) Main Body (Core Section)
Cylindrical casing: formed by steel plate spinning, ensuring coaxiality, and coated with anti-corrosion paint
Blade assembly
Airfoil-shaped aluminum alloy blades + cast steel hub; two schemes for speed adjustment type
Scheme A: The moving blades can be adjusted, and the blade installation angle can be adjusted during shutdown to change the air volume and thrust;
Scheme B: Two-speed motor / frequency conversion speed regulation, adjusting the speed during operation to achieve stepless / two-level speed regulation (the “speed adjustment” meaning commonly used in engineering)
Special axial-flow motor
Specific for tunnel fans, IP55/H insulation level; fire-resistant type can withstand 280°C for 2 hours; bidirectional type supports rapid forward and reverse rotation
Motor bracket, rectifying guide vanes: optimize airflow and reduce vortex loss
2) Components of SDS Tunnel Jet Fan
Inlet and outlet noise suppressors (1D/2D length selectable): perforated plate + sound-absorbing cotton, controlling fan noise
Installation supports / hangers: suspended installation on the tunnel top
Inlet guard net cover, preventing foreign objects from entering
3) Speed Control System (Standard for Speed-Adjustable Fans)
Two-speed control box / frequency conversion control cabinet
Optional: motor bearing temperature monitoring, vibration sensor, remote PLC interface
II. Working Principle of SDS Tunnel Jet Fan
The fan sucks in air and accelerates it to form a high-speed jet, relying on the momentum suction effect to drive the overall flow of a large amount of air in the tunnel;
Speed control function:
During normal traffic volume: low-speed operation, energy saving, and noise reduction;
During traffic peak / fire smoke exhaust: high-speed full-load operation, enhancing ventilation thrust.