• Durability: Vinylester resin, UV protection, extended service life.
• Customizable: Computer strain analysis, G2.5 balance, low vibration risk.
• Easy Maintenance: Oil bath bearings, heat/corrosion resistant, cost-effective.
• Professional Team: Expert wind turbine guidance.
• High aerodynamic efficiency, low noise, corrosion resistance.
• Medium temp range: -20℃ to 80℃, ≤ humidity, ≤ 100mg/m3 dust content.
• Durable Fiberglass Build: Ensures long-lasting performance.
• Ethylene-based fiberglass blades optimize airflow.

Application

The G6-51-1 and Y6-51-1 boiler centrifugal induced draft fans are suitable for the induced draft systems of 2-670t/h steam boilers in thermal power plants, meeting the high-pressure head performance parameters required for fluidized bed furnaces. These industrial centrifugal fans can also be used for dust removal, mine ventilation, and general ventilation systems. The fans efficiently convey air and flue gas containing particulate impurities. When the impurity concentration is less than 200mg/m³, the impeller can last for more than 5 years. If the impurity concentration is higher, the service life will be shorter. The maximum operating temperature of the induced draft fan is 250℃.
 

Form

1.  
2. 1. The blower and exhaust fan are made in single-suction form, with 21 machine numbers ranging from No.8 to No.31.5F, offering a total of 42 specifications.
3. 2. Each fan can be configured in either left-hand or right-hand orientation.
4. 3. The inlet and outlet positions of the fan are indicated by the inlet angle of the air inlet box and the outlet angle of the casing. For example, the outlet is marked as 45°, and the inlet is marked as 135°.
5. 4. The fan uses an F-type transmission mode, with the motor and fan connected by elastic coupling for direct drive.
6. 5. Product example: G6-51-1No.18F right 45°/135° and Y6-51-1No.18F left 45°/135°. In these examples, G and Y represent the boiler blower and boiler induced draft fan, respectively.

Structural Characteristics

1.  
2. 1. The design of this series of fans is based on aerodynamic models refined through over a year of testing. It incorporates patented technologies such as the "adjustable air inlet" and "oblique cone air inlet", as well as proprietary advancements including high-strength wear-resistant impellers, an oil-leakage-proof bearing box, and a self-aligning axial adjustment door.
3. 2. These fans offer a wide high-efficiency operating range, with densely arranged fan numbers that make selecting the optimal operating point easy.
4. 3. Patented Adjustable Air Inlet: This feature allows for axial and radial adjustment of the air inlet relative to the impeller. It helps avoid friction during operation, and during maintenance, the air inlet can be adjusted axially for easy disassembly of the rotor. The oblique cone air inlet eliminates vortex instability, ensuring stable air intake.
5. 4. High-Strength Wear-Resistant Impeller: The impeller uses backward-curved single-plate blades to reduce airflow impact, ensuring good stability and reducing motor overload risks. Wear-resistant welding rods are used to reinforce the high-wear parts of the blades, extending the fan's service life. This design mitigates vibration caused by dust accumulation on the non-working surfaces of hollow blades.
6. 5. Anti-Leakage Bearing Box: This bearing box design features an overlapping oil-slinging ring to prevent oil leakage, and semi-circular aluminum oil seals that reduce axial pressure. The design includes a vent plug to maintain slight positive pressure in the box, ensuring dustproof performance.
7. 6. Self-Aligning Regulating Door: The guide vane fulcrum uses a self-aligning bearing, ensuring that there is no "dead point" during operation. This makes adjustment flexible, safe, and reliable, preventing motor overload.
8. 7. Double-Support Structure: The fans are built with a domestic bearing motor and direct drive system, which helps evenly transmit torque, reduce vibration, and ensure reliable performance.
9. 8. Fully Equipped: The fan comes complete with regulating doors, coupling covers, inlet and outlet flanges, anchor bolts, inlet and outlet soft connections, and vibration measuring instruments for larger models. Additional accessories such as shock absorbers, mufflers, and actuators can be provided as needed.
10. 9. Comprehensive technical parameters are provided, including weight, static and dynamic loads, rotor flywheel torque, resistance torque curve for the fan start process, regulating door resistance torque, and overall dimensions.
11. 10. Key product quality measures include:

• 1. All fans are designed and manufactured according to national and industry standards.
• 2. Performance is verified through similar conversion tests based on the fan model.
• 3. Non-destructive testing is conducted on fans with impeller diameters exceeding 2 meters or circumferential speeds exceeding 100m/s.
• 4. Reinforced blades and wear-resistant welding are applied to areas of high wear on the induced draft fan blades.
• 5. Soft connection belts are used at the fan inlet and outlet to prevent interference caused by deformation stress in the pipeline.
• 6. Fans larger than No.13 are equipped with vibration protection devices to prevent damage.

Performance and Selection

1.  
2. 1. Fan performance is expressed in terms of flow rate, total pressure, shaft speed, shaft power, and efficiency. The listed performance data are calculated based on air with a temperature of t₀=20℃, atmospheric pressure of pₐ=101325Pa, and gas density of ρ₀=1.2kg/m³ for blowers. For induced draft fans, the data are based on an air temperature of t₀=140℃ and a gas density of 0.85kg/m³. The performance curve and data in the performance table assume that the adjustment blade is fully open at 0°. The performance table is used for ordering, and the deviation in total pressure should not exceed ±5% of the design value.
3. 2. The performance data in the table are calculated using model test data.
4. 3. Dealing with Excessive or Insufficient Flow: Excessive or insufficient flow during use is often caused by resistance in the pipe network. Adjustments can be made by opening or closing the regulating door, changing the fan speed, replacing the fan with a higher or lower pressure version, or adjusting the pipe network resistance coefficient (K). When the regulating door is fully open and flow remains insufficient, changing the pipe network to reduce resistance or increasing the fan speed may help. However, the fan speed must not exceed the maximum listed in the performance table.