Energy-Efficient Centrifugal Fan Series | XFS-QS (Plate-Type Blade) Centrifugal Fan

01 

 XFS-QS (Plate-Type Blades) VS (Airfoil-Type Blades)

       The XFS-QS model fan falls within the medium flow and medium pressure range, achieving a maximum fan efficiency of 87%. Suitable for forced draft and induced draft systems in thermal power plants, circulating fluidized bed forced draft and induced draft fans, particularly ideal for power plant induced draft, steel mill dust removal, cement kiln induced draft, and also applicable as centrifugal fans for mine ventilation and general ventilation. For years, the XFS-QS (airfoil blades) has been widely adopted across petroleum, chemical, metallurgical, and power plant sectors. However, due to the hollow design of the airfoil blades, even with wear-resistant coatings, once blades wear to a certain extent, dust accumulates inside the hollow blades after wear-through, affecting rotor balance and causing unit vibration. This is particularly evident in applications with high dust content, such as steel plant dust removal and cement kiln induced draft, where service life is significantly shortened.

     Compared to XFS-QS (airfoil blades), XFS-QS (plate blades) offer advantages in addressing dynamic imbalance issues caused by wear. Even when blades wear down, they do not compromise rotor balance. Performance characteristics: Maximum efficiency is essentially identical. At low flow operating points, plate blades exhibit slightly higher efficiency than airfoil blades, while at high flow points, plate blades show slightly lower efficiency. Furthermore, for the same model, both the casing dimensions and fan inlet/outlet connection sizes remain identical.

    02 

 XFS-QS (Plate-Type Blade) Fan Selection Advantages

        Example: Near the most commonly selected optimal operating point (where fan efficiency exceeds 85%), three operating points are selected. Dimensional parameters for plate-type and airfoil-type blades are calculated and compared. 

Pa=101300Pa

 p1=0.85kg/m³

 n=980r/min

03 

 The XFS-QS (plate-type blade) fan offers the following advantages:

   A: Resolves rotor vibration issues caused by blade wear, extending impeller service life.

 B: When retrofitting existing XFS-QS (airfoil-type) blade fans in the field, no casing replacement is required. Under unchanged foundation and inlet/outlet interfaces, only the impeller and inlet duct need replacement.  

C: High efficiency, with maximum fan efficiency reaching 87%, matching the peak efficiency of airfoil blades. Performance is equivalent to airfoil blades.

 D: Plate blades facilitate easy machining, saving labor, time, and effort. In summary, the XFS-QS (plate-type blades) offers equivalent versatility to airfoil blades while retaining their high efficiency and adding unique advantages. This makes it more competitive in the market than airfoil-equipped XFS-QS fans. 

04

XFS-QS (Plate-Type Blade) Fan Parameters