Spiral duct in the operation process will produce certain noise, if in residential and commercial areas will have a great impact on people's lives. So how can we reduce the noise in the construction process?
The running noise of Jinan ventilation pipe system usually comes from the following aspects:
The vibration of the duct. Because the air duct information is galvanized sheet or metal information, the steel plate thickness and construction technology should be strictly selected according to the construction acceptance standard, such as the air duct manufacturing deviation, straightness, air duct reinforcement, support selection and manufacturing device, etc. At the construction stage, the air outlet should not be close to the equipment as far as possible. The front and back of the fan should be more than 5 meters long. If the number of elbows can be added, the noise can also be reduced. If the air outlet is equipped with a filter, the noise control effect is also very good.
The sound of the fan. We can usually install a muffler
The clash of wind in the duct. Usually in the design stage, we need to consider the problem of noise, design and control the wind speed in the pipe to prevent the wind from whistling. Here are some experiences.
1. Control the air outlet and return air interval to prevent the self-excited appearance and small circulation space during air convection.
2. The dynamic balance adjustment of spiral duct fan impeller system is reasonable, and the fluctuation of positive and negative is no more than 5 threads.
3. The standard of flexible joint device can prevent wind resistance and wind noise caused by loose canvas.
4. The suspension adopts the spring shock absorber connector to reduce the runout or common frequency caused by torsion during operation.
Shandong ventilation pipeline
5. The angle of spiral duct should be reduced as much as possible
There are three ways to connect the corner seam or closing seam of Shandong ventilation pipeline: welding, riveting and biting. Because of the outstanding characteristics of high strength, good tightness, even joint, no damage to the surface quality of the plate, beautiful appearance, easy to complete mechanized processing, the biting joint technology has been widely used.
The common corner seam bite modes are combined corner bite, button bite and corner bite, and the common closed seam bite modes are single flat bite and single vertical bite.