How to reduce noise better for GXF axial flow blower.electric fan manufacture

　　When everyone uses the positive pressure blower, they will feel that the noise of the fan is very loud, so they will take certain solutions to deal with it. But in different ways, the results are also different. Are you using the correct way to reduce noise? Here are some ways to correctly reduce the noise of the positive pressure blower, I hope you don't miss it.

　　In fact, the noise of the positive pressure blower is generated when the equipment is supplying air, and the blades are periodically subjected to the pulse of uneven airflow; on the other hand, due to the uneven pressure distribution on the blades , the disturbance to the surrounding gas and parts during rotation also constitutes rotational noise. In addition, due to the turbulent boundary layer generated by the gas flowing through the blade, the vortex leaves, causing the pulsation of the pressure distribution on the blade to generate vortex noise. Rotation noise and eddy current noise combine the aerodynamic noise of the fan, so controlling the aerodynamic noise of the blades is the fundamental to eliminate the fan noise. The shroud, the layout of the motor support and the vertical chamber of the fan and the air-cooled condenser that make up the positive pressure blower also affect the performance of the fan to a considerable extent, which must also be studied in detail.

　　Low noise: The outer casing of the fan is specially designed to greatly reduce the outflow noise. Under the working conditions of unit air volume and unit air pressure, the ratio of A

　　The sound level can be reduced by 2-3dB(A), and at the same time at a lower speed, higher fan pressure can be obtained. in industrial and mining enterprises and high-level civil buildings

　　In the air supply and exhaust system, it can replace the low-pressure centrifugal fan or replace the high-pressure axial fan without a lot of noise reduction measures.

　　Advantages of positive pressure blower:

　　Advantage 1. The airfoil of the positive pressure blower is determined through model test research. The axial flow positive pressure blower adopts a cylindrical hub structure, and the motor is remodeled to reduce the flow loss in structure, so that the fan efficiency is The area of the outlet circle is increased to 77%. Which GXF axial-flow positive pressure blower should be selected, according to the area of the outlet ring, it is increased to 89.5%, which is 3.6dB lower than the A sound level.

　　Advantage 2. The positive pressure blower is divided into 13 machine numbers according to the diameter of the impeller, which are arranged as №2.8, 3.15, 3.55, 4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2. Each machine number is divided into 5 types of installation angles of the blade axial flow positive pressure blower blades, such as 15°, 20°, 25°, 30°, and 35°.

　　Depending on the type of axial flow blower, the noise generated during operation will also vary. Although the high-efficiency axial blower is inevitably noisy, it is still annoying. Because the axial flow blower has such a great relationship with our production, the noise reduction of the axial flow blower operation is naturally a very important topic. Hope this article can give you some reference and help.

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