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What is the common size of the fan stall surge axial flow fan

Release Time：2021-07-20

Fan stall and surge:
Stall: is a kind of hydrodynamic phenomenon caused by the structural characteristics of the blade, such as: the rotation speed of the stall zone, the starting point of the flow, the disappearance point, etc., all have its own laws, and are not affected by the volume and shape of the fan system.
Surge: It is a manifestation of the oscillation characteristics after the fan performance is coupled with the pipeline device. Its basic characteristics such as amplitude and frequency are controlled by the volume of the fan pipeline system. The fluctuation of its flow and pressure power is caused by unstable working conditions. However, the experimental research shows that the axial flow fan of surge phenomenon is always closely related to the flow separation in the blade duct, the increase of the angle of attack is also related to the decrease of the flow rate, so the rotational flow separation is bound to occur in the unstable working condition area of surge.
They are typically designed to handle large volumes of air at low pressure (SP) and are typically available on direct-drive models, where the propeller is mounted on the motor shaft, as well as belt-driven models, where the material used for industrial axial fans is typically mild steel, however, some applications may require aluminum propellers or a lot of aluminum for spark, stainless steel or coating for resistance, some applications of axial fans may also require the fan to be belt-driven outside the airflow without being affected by air flow conditions, such as high temperature, excessive dirt or corrosive pollutants.
Axial flow fans Axial flow fans have common dimensions, voltage characteristics and CFM, etc. They are used to cool many machines from computers and copiers to industrial controllers, vending machines, lighting systems and other electrical equipment in manufacturing and engineering facilities. Axial flow fans exchange hot air by moving hot air in many equipment and systems, which proves that they can save space. Axial flow fans are characterized by small installation and low noise, high efficiency, suitable for air flow through the heat exchanger. The function of the axial fan is similar to that of the propeller. The axial fan moves axially parallel to the rotating motor shaft. The outer rotor motor is directly integrated in the axial impeller to form a compact axial fan unit. In addition, the use of the motor can also achieve accurate control of the air flow. They have speed output, linear or PWM input, bus connection interface and many other functions, they are usually fitted with a wall ring with a short ring or a long flared mouth.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of FRP in China. The company has Grade II qualification for fire protection facilities engineering, Grade II qualification for construction mechanical and electrical installation engineering, Grade II qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, and an axial fan invention patent, A fan utility model patent, environmental assessment, safety assessment, three simultaneous and other procedures are complete.