China Fan Muffler Exhaust Pipe Muffler Drum Fan Muffler

Fan muffler, exhaust pipe muffler and drum fan muffler are all in the form of resistive sound absorption and noise reduction with good effect on medium and high frequency broadband characteristics, and good resistance to low, medium frequency and pulsation characteristics. Acoustic sound reduction principle and micro-perforated muffler and impedance composite muffler.
The resistive muffler is an absorption type muffler, which is generally classified into a straight tube type, a sheet type, a flap type, a honeycomb type, a sound flow type, a labyrinth type, and an elbow type according to the structure of the air flow passage. Resistive muffler is the use of sound waves in the porous sound absorbing material to be transmitted by the friction and viscous resistance, which converts the sound energy into heat energy dissipation, thereby achieving the purpose of noise reduction and sound reduction. It is the most widely used type of muffler in all mufflers.
Resistant muffler is different from the muffler and noise reduction principle of resistive muffler. It can not directly absorb sound energy. Instead, it uses the abrupt interface or bypass resonator on the pipeline to make certain frequency sound waves propagating along the pipeline. Reflections, interferences, etc. occur at the site to achieve the purpose of noise reduction and sound reduction. Divided into expansion chamber muffler and resonant muffler. In the actual noise control project, the noise is mostly in a wide frequency band, and the resistive sound absorption noise reduction and the resistance noise reduction structure are usually combined to control the high intensity broadband noise.
1. Impedance sound flow ventilation, exhaust pipe and fan muffler structure principle:
According to the spectral characteristics data obtained by actual testing of various types of wind turbine operating noise sources for industrial use, it is determined in which spectral range the amount of noise reduction is required as the main basis for designing sound absorbers and fluid passages, and a large suction is adopted. A narrow rectangular channel of acoustic material finish to enhance absorption. In addition, when the noise source of the fan is at the maximum noise level, the spectrum value is often more than one, and the requirements for the noise reduction are different for different spectrum bands. For this reason, the GF series ventilation duct silencer and the drum fan silencer are impedance sound flow type, which adopts a resistive structure for sound absorption and noise reduction of high and medium frequency noise and anti-noise and noise reduction for medium and low frequency noise. In the structure, at the same time, high-frequency and low-frequency sound-absorbing and muffling zones are adopted in the resistive channel to maximize the widening of the muffling frequency band to achieve good noise reduction and noise reduction effects. GF series ventilation duct fan muffler and drum fan muffler are suitable for all kinds of centrifugal, axial flow, Roots blower and air compressor.
2. Impedance sound flow type fan muffler (fan muffler) use and product features:
The fan is a kind of general mechanical equipment, and its use range is very wide. The production of electric power, mining, machinery, metallurgy, chemical industry and other industries are inseparable from the fan. The noise generated by the fan during operation often becomes a source of pollution affecting workers' health and interference with the environment. Especially the wind turbines adjacent to the living area, the aerodynamic noise radiated by the air inlet and the air outlet are the main factors polluting the environment and forming public hazards. It is one of the main targets for the pollution pollution control of the industrial sector in China in recent years. Industrial fans are continuous equipment. The International Standards Organization (ISO) has a noise standard of ≤90 decibels for such equipment, which is also the basis for continuous noise compliance in industrial enterprises. However, without the use of muffling measures, the fan inlet and outlet outlets are emitted to the environment. The noise can reach 110-120 decibels, which greatly exceeds the requirements for compliance.
This type of muffler (fan muffler) series products are impedance sound flow type. based on the characteristics of the enthalpy characteristics obtained from the actual test of the noise source of various types of wind turbines in the power plant, the factory determines which spectral range needs to be used as the main basis for designing the sound absorbing sheet structure and fluid passage, and adopts A narrow rectangular channel with a larger sound absorbing material finish to enhance absorption. We know that when the noise source of the fan is at the maximum noise level, the spectrum value is often more than one, and the requirements for the noise reduction are different for different spectrum bands. For this reason, the product adopts a resistive structure that suppresses the sound of high and medium frequency noise, and a resistive structure that suppresses the sound of the medium and low frequency noise. At the same time, two kinds of muffling are used in the resistive channel. Zone to maximize the widening of the muffling band for good noise cancellation. When the user installs the product as required, the limit noise level will not exceed 85-90 decibels.
The impedance sound flow muffler (muffler) introduced in this description is applicable to all kinds of centrifugal and axial flow fans

ventilation, exhaust fan muffler (muffler) and fan muffler ordering instructions:
1. Noise reduction (muffling) object and installation location It is convenient for us to choose the best muffler model for your power plant.2. Interface size for on-site installation and connection of your power plant3. Air volume m3/H, m3/min or m3/sec4. Pressure Pa, KPa, MPa