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Axial fan motor selection rules performance impact

Release Time：2021-07-20

The axial flow fan is developed according to the basic principle that one side of the closed room exhausts the air and the other side of the induced draft fan, and the room will form an "air conditioning fan activity field" in the overall planning (design of large projects or plans). It uses mechanical equipment to exhaust air and induced draft fan to form an air conditioning fan activity field in the system software. This is a new type of environmental maintenance household appliance with clean and fresh indoor air quality.
This kind of separate indoor air quality replacement, cleaning the respiratory system, can clean the air infection in the room, in addition, the air entering the room is fresh, the air conditioning fan entering the axial flow fan in the room is first treated by filtering, sterilization, heating, oxygenation and other treatments. The motor selection of the axial flow fan (full name: axial flow fan) shall follow the following rules: the selection of axial flow fan shall be integrated with the detailed conditions of the new project, according to the local natural astronomy, climate and other norms to carry out a comprehensive analysis, comment on its economic development of professionalism, choose different models.
According to the ventilation volume and application rules, the exhaust volume of the roof axial flow fan is understood, the equipment method is selected according to the exhaust volume and equipment specifications, and the residual pressure of the generator unit is selected according to the transportation spacing and friction resistance. The application of the axial flow fan is standardized. The axial flow fan assumes that the application is not good or the natural environment of the equipment is not good, which not only cannot protect the environment and save energy, but also increases energy consumption.
The radial clearance of the axial flow fan refers to the gap between the blade tip and the inner wall of the casing, and the axial clearance refers to the gap between the two cascades of the impeller. The size of the two gaps has an impact on the performance of the fan.
The radial clearance of the axial flow fan is too large and the negative pressure is high, which will inevitably cause a large air pressure difference between the top of the blade and the two sides of the casing clearance. The air pressure difference is the main cause of axial air leakage. The air leakage is drawn back by the blade and discharged to the atmosphere, forming a "circulating air flow" axial flow fan. The work of this part of the air flow is consumed in vain, thus reducing the efficiency of the fan.
When the rotor rotates, the gas spirally advancing along the axial direction is thrown around by the rotating blades because of the weight of the air itself and the moisture and dust particles contained in the air. The particles of the air are densely near the casing and close to the inner wall. Spirally flow forward, increasing the airflow density and negative pressure in the radial direction. In this case, the radial gap is too large, the change back generates a large amount of cylindrical airflow in the axial direction along the gap ring around the casing, which impacts with the normal airflow, causing the airflow to consume work in vain, thereby reducing efficiency.
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.