Boiler blower – High-pressure combustion aid centrifugal fan structure: The fan consists of a casing, inlet, impeller, bearing box, overall support, adjustable air door (depending on customer requirements) and motor. Before leaving the factory, the fan undergoes strict testing and the vibration amplitude complies with national standards. For specifications 18 and above, the entire frame is purchased according to customer requirements (usually using concrete foundations).
Boiler blower – High-pressure combustion booster centrifugal fan application: Primarily used for high-pressure forced ventilation in industries such as kilns, forging and smelting furnaces, glass, electroplating, ceramics, batteries, radio electronics, etc. They can also be widely used for material transportation in industries such as food processing, feed processing, mineral powder processing, etc., and are suitable for use with paperboard machinery, tempered glass machinery, etc. The conveying medium includes air and other non-toxic, non-corrosive, non-flammable gases that are not easily explosive, and should not contain viscous substances. For general ventilation and air exchange.
For the transportation of gases with a certain concentration of corrosive substances, corrosion-resistant fans made of glass fiber materials or stainless steel can be used. For the transportation of flammable and explosive gases, explosion-proof fans made of cast aluminum rotors and explosion-proof motors can be used. For the transportation of gases between 80°C and 250°C, water-cooled bearing seats made of ordinary steel plates can be used, while for gases above 250°C, stainless steel materials are recommended.
As the temperature of the conveyed gas increases, the pressure of the centrifugal fan will change accordingly, and the power of the motor may also need to be adjusted. For details, please consult the manufacturer.
Boiler blower – High-pressure combustion-assisting centrifugal fan type
1. This fan adopts a single suction design. The specifications range from No. 4 to No. 24.
2. Each type of fan can also be made in left-hand or right-hand configurations. From the perspective of the motor side, if the impeller rotates clockwise, it is called a right-hand fan and is represented by “right”; if it rotates counterclockwise, it is called a left-hand fan and is represented by “left”.
3. The outlet position of the fan is indicated by the angle of the housing outlet. For 9 – 19 type high-pressure centrifugal fans, the outlet is rectangular, but it can be customized as circular according to customer requirements.
4. The driving methods of the fan are: Type A: directly connected to the motor; Type C: belt drive; Type D: coupling drive.
Boiler blower – Characteristics of the high-pressure combustion centrifugal fan: 1. Compact structure: The appearance is beautiful, with good stability, and installation and maintenance are simple. 2. Smooth operation: The optimized design of the impeller reduces the axial force to the minimum level. The use of high-efficiency impellers and static and dynamic balance processing ensures the smooth operation of the entire machine. No additional vibration reduction devices are required, and the bearing amplitude is ≤ 0.06 mm. 3. Low noise: There is no mechanical friction during operation. The reasonable blade shape reduces noise. The noise generated by the centrifugal blower is of high-frequency type, which can be absorbed by obstacles, so the noise outside the fan room is almost undetectable. 4. Oil-free machinery: The bearings of the fan use grease lubrication, and the bearing life exceeds three years. No oil mist is generated during operation. For special requirements, molybdenum-lithium base grease can be used for bearing lubrication. 5. Centrifugal fan impeller: The impeller adopts a special composite profile, reducing internal leakage and improving volumetric efficiency. 6. Easy adjustment: The butterfly valve at the inlet regulates the flow rate, while the butterfly valve at the outlet regulates the pressure. 7. Driving method: Usually driven by a full copper core, three-level energy efficiency motor. Different voltage motors can be used according to the user’s power grid conditions. 8. Cooling of centrifugal fan: There are two structures for the exhaust bearing seat, namely air-cooled and water-cooled. Due to the gradual compression of the gas in the impeller, the temperature of the exhaust housing is much higher than that of the intake housing. Installing air-cooled or water-cooled devices at the exhaust bearing seat can extend the service life of the bearings. The structural characteristics of the boiler centrifugal blower are as follows: This series of fans adopt advanced proprietary technologies such as high-strength wear-resistant impellers, leak-proof bearing boxes, and hinged axial adjustment doors. 2) The operating range is wide and the fan specifications are closely arranged, making it easy to select the efficient operating point. 3) The adjustable inlet design enables adjustment of the axial and radial clearances between the inlet and the impeller during installation. 4) High-strength wear-resistant impellers, using backward-facing single-blade blades, can reduce air flow impact and ensure stable operation, preventing motor overload, and significantly extending the service life of the fan. This type of fan has the characteristics of high-pressure head coefficient, low peripheral speed, and low noise, and is highly practical. 5) The leak-proof bearing box uses a scraping ring to甩 the oil generated by the high-speed rotating bearings towards the inner wall of the bearing box and return to the oil tank. The semi-open aluminum oil seal is convenient for maintenance， can prevent friction accidents， and increase axial resistance to intercept some thin oil and return it to the oil tank. The external packing cover can block a small amount of thin oil. The upper part of the bearing box is equipped with an air vent plug to reduce the micro positive pressure inside the box and ensure no leakage and excellent dustproof performance.
