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Products > Mine ventilation fan > > FBD series mine flameproof compression type counter-rotating axial fan
Product name : FBD series mine flameproof compression type counter-rotating axial fan
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  Details:
1. Product profile
 
FBD series of mine flameproof compression type counter-rotating axial flow local fan (hereinafter referred to as fan fan, mainly used in coal mine with methane gas explosive danger, for coal mining face
 
Medium and long distance ventilation. The fan has the characteristics of reasonable structure, high efficiency, obvious energy-saving effect, low noise, long air supply distance and so on. It is an ideal equipment for local ventilation in coal mine. Its structural characteristics are flameproof, counterrotating, silencing, etc. Performance Standard of Axial flow. Ventilator: enterprise Standard q/ sdts002-2007 < fbd series flameproof and pressure-in counter-rotating axial flow local fan > and industry standard mt222-2007 < Technical condition of Coal Mine Local Fan.
 
2. Structural features
(1) the series of fans are composed of an inlet duct, a main duct, a flameproof motor, a first stage impeller, a second stage impeller and a diffuser. The structure is shown in figure 1, and the outer tube and structural parts are welded by steel plates, The inner cylinder is welded with perforated plates, and the inner and outer cylinders are filled with silencing materials. The air ducts are connected by flange bolts and the impeller is connected directly with the motor. The machine is compact, durable and safe to use. The ventilation impeller adopts counterrotating structure, the radial clearance between the fan impeller and the housing should be 1.5 ‰ ~ 3.5 ‰ of the impeller diameter, and the two-stage impeller, etc.This series of fans can be used in multi-purpose, according to the different requirements of ventilator during roadway tunneling, because of reducing the internal resistance of the fan and improving the efficiency of the fan. The first stage fan and the second stage fan can be used either separately or simultaneously. The two motors can be used in 380 / 660v voltage grade, and the air is cooled by the impeller.However, the junction box of the motor is located on the outer side of the fan shell for convenient wiring. There are six terminals and one grounding terminal in the junction box. The user selects the wiring method according to the supply voltage. When the supply voltage is 380 v, the δ connection method is selected. When the supply voltage is 660v, y connection method is used. The motor is connected by δ when the fan leaves factory.) the working principle of this series of fans is that the first stage impeller is very close to the second stage impeller, Driven by a special flameproof motor of the same or different capacity and type, the first stage impeller is opposite to the second stage impeller in the direction of rotation, that is, the first stage impeller rotates clockwise, the second stageThe impeller rotates counterclockwise, and the blade adopts twisted blade. When the air flows into the first impeller to obtain energy and is discharged by the second stage impeller, the two stage impellers are guide vane each other, thus reaching the high wind pressure not easily reached by the ordinary axial flow fan.


Please contact us and get detailed Technical parameters and Drawings.
 
We could Design and Produce the Marine fan,Industrial Fan,and Other Ventilation Equipment according to your detailed requirement !

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