The popularization of the definition of cross-flow fans
time：
2022-06-28
Cross-flow fans are small high-pressure centrifugal fans with forward-facing multi-blade impellers. The gas enters the impeller from one side of the outer edge of the rotor, and then passes through the interior of the impeller and is discharged from the other side, where the gas is subjected to the force of the blades twice in the impeller. Under the conditions of the same performance, it is small in size and low in speed. Compared with other types of low-speed fans, cross-flow fans have higher efficiency. Its axial width can be selected arbitrarily without affecting the flow state of the gas, and the gas still maintains a uniform flow over the entire width of the rotor. Its outlet section is narrow and long, suitable for installation in various flat equipment for cooling or ventilation.
Introduction
Cross-flow fans are small high-pressure centrifugal fans with forward-facing multi-blade impellers. The gas enters the impeller from one side of the outer edge of the rotor, and then passes through the interior of the impeller and is discharged from the other side, where the gas is subjected to the force of the blades twice in the impeller. Under the conditions of the same performance, it is small in size and low in speed.
Features
Compared with other types of low-speed fans, cross-flow fans have higher efficiency. Its axial width can be selected arbitrarily without affecting the flow state of the gas, and the gas still maintains a uniform flow over the entire width of the rotor. Its outlet section is narrow and long, suitable for installation in various flat equipment for cooling or ventilation.
performance
The performance parameters of the fan mainly include flow, pressure, power, efficiency and speed. In addition, the size of noise and vibration is also the main technical indicators of the fan. The flow is also called the air volume, which is expressed by the volume of the gas flowing through the fan in unit time; the pressure is also called the wind pressure, which refers to the pressure rise value of the gas in the fan, which can be divided into static pressure, dynamic pressure and total pressure; the power is Refers to the input power of the fan, that is, the shaft power. The ratio of the effective power of the fan to the shaft power is called efficiency. The full pressure efficiency of the fan can reach 90%.
future development
The future development of fans will further improve the aerodynamic efficiency, device efficiency and use efficiency of fans to reduce power consumption; replace large centrifugal fans with axial fans with adjustable moving blades; reduce fan noise; Wear resistance of dust exhaust fan impeller and casing; realize variable speed adjustment and automatic adjustment.
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