FBD SERIES EXPLOSION-PROOF PRESS-IN COUNTER-ROTATING AXIAL FLOW LOCAL FANS
FBDseriesexplosion-proofpress-incounter rotating axial flow local fans are mainly used under mine shafts and the places containing gas, coal dust or inflammable gas of other industrial departments,and can be used for mine tunneling, shaft building and tunnel long-distance ventilation of coal mines,metal mines, chemical mines and other mines.The fans are applicable to places where medium temperature is less than 40 ℃ and humidity is less than 95%±3% (at 25℃ ) and without corrosion.
Key Features
1. The fans of various series all use the simplest transmission device of direct connection between motor and impeller.
2. Wing twisted blades are used, which have high aerodynamic efficiency. The static pressure efficiency of single-stage series fan and counter-rotating series fan devices is as high as above 80%, thus the high efficiency area is wide and energy saving effect is obvious.produced with cylinder wall, and then accident is caused, and make the operation of fans be safer and more reliable.
3. Fans for mines select explosion-proof motors and put motors in isolating chambers of fans to ensure the isolation between wind current and air flow containing gas in fan flow channel and meanwhile, play heat dissipation and diversion function.The wind current pipe makes the surrounding area of motor is connected with atmosphere, which both increases the safety performance of motor and directly dissipate the heat of motor to air and improve the safety of fan operation.
4. In the cylinders of rotating parts of impellers of fans for mines, copper ring devices for inhibiting spark energy are added to prevent deformation from being occurred during high speed running of impellers and spark from being
5. There are various performances and complete specifications in the Company.The fans matching with ventilation networks of various coal mines and non-coal mines are available for selection, and long-term high efficient operation could be guaranteed.
6. Fans could reverse the air flow and the reversal air flow could reach more than 60% of direct air flow. Thus the “S” type air channel, reversal air channel and fan room of traditional air cave outlet could be saved. The fans are especially suitable for places with small site area, surface subsidence and landslide dangers.
7. The main parts of fans use steel plate and section steel installation and welding structure. Blades are in hollow steel plate welding structure, thus strength of blades and overall strength is high.
8. Low noise. Noise of various series of fans could reach requirement of Chinese standards. Besides, in accordance with the requirements of users, mufflers are made and sound arresters and silencers are added in diffusers and diffusion towers to lower the noise in a further way.
