| Fan muffler | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 Fan muffler, exhaust pipes and mufflers muffler blowers are used in the form of the principle of resistive acoustic noise, and high bandwidth characteristics have better effect on the low, with good results at midrange and pulsation characteristics of resistance to extinction sound principle and sound reduction micro-perforated muffler and impedance composite muffler.
Resistive muffler is an absorption-type muffler, depending on the flow channel structure, generally divided into straight tube, chip, folded plate, cellular, acoustic streaming, etc. labyrinth and elbow style. Resistive muffler is the use of sound waves at the porous sound-absorbing material spread by friction and viscous resistance, the sound energy into heat energy dissipated, so as to achieve the purpose of reducing muffler sound. It is all muffler most widely used of a class muffler.
It muffler and muffler noise resistive principle, it can not directly absorb sound energy, but to use the pipe interface mutations or bypass the resonant cavity, make certain frequency sound waves propagating along the pipeline, the mutation interface occurred at the reflection, interference phenomena, so as to achieve the purpose of reducing muffler sound. Into the expansion chamber muffler and muffler resonance.
Because the actual noise control engineering, the noise in wideband majority, usually resistive acoustic noise reduction and sound reduction muffler structure combine to control the high-intensity broadband noise.
1、Impedance acoustic streaming type of ventilation, exhaust pipes and mufflers fan structural principle: According to the spectral characteristics of various types of industrial noise sources fan running scene made the actual test data to determine how much volume as the main basis for the design muffler absorber and the fluid channel within which the spectral range, while using a large suction sound material finishes narrow rectangular channel, to enhance absorption. Also, the fan noise source at the maximum noise level, its value is often more than one spectrum, while the different spectral bands, its requirements are not the same muffler.
To this end GF series ventilation pipe muffler and muffler blowers are impedance acoustic streaming type, using a pair of high frequency noise from the sound-absorbing silencer structure and role of the resistance against the low-frequency noise from the muffler sound reduction effect of the anti-structure, while using the resistance-type channel high frequency and low frequency sound-absorbing silencer region, to maximize the widened band muffler, the muffler to achieve good noise reduction effect.
GF series ventilation duct fans and blowers muffler muffler applicable to all types of centrifugal, axial, Roots blower and air compressor.
2、Acoustic impedance flow type fan muffler (silencer fan) Uses and Features: Fan is a universal machinery and equipment, the use of a wide range, power, mining, machinery, metallurgy, chemical industry and other sectors of production are inseparable from the fan. Fan noise generated during operation is often an impact on the health of workers and interference environment curse. In particular fan near the living area, the inlet and outlet of the radiation of aerodynamic noise, pollution of the environment is a major factor, forming pollution is one of the industrial sector governance noise pollution in recent years, our main target.
Industrial fans, is a continuous operation of the equipment. International Organization for Standardization (ISO) standards for noise requirements for such equipment for ≤90 decibels, the new standard of our country and the same, this is the industry standard for business continuity basis of noise, but do not use the silencer measures under the circumstances, fan inlet and outlet noise emitted into the environment up to 110 to 120 decibels, much higher than the standard requirements.
This type of muffler (fan muffler) series of products for the acoustic impedance flow pattern. Our power plants based on various fan run site near the noise source characteristics achieved by actual test data to determine how much volume as the main basis for the design muffler sound absorbing sheet structure and the fluid channel within which the spectral range, while using a large sound-absorbing material finishes narrow rectangular channel, to enhance absorption. We know that the fan noise source at the maximum noise level, the spectrum value is often more than one, but for different spectral bands, its requirements are not the same muffler. To do this with a pair of high, medium frequency noise from the muffler structure and role of the resistance of the low-frequency noise from the muffler role of anti-type structure of the product, while using the high-frequency and low-frequency two silencers in the resistance-type channel area, to maximize the widened band muffler, the muffler to achieve good results.
The product is installed when the user presses the requirements, which limit the noise level will not exceed 85 to 90 db.
This note describes the impedance of the sound flow type muffler (silencer) applies to all types of centrifugal, axial fan, in addition, I also design and production of gas turbines, blower, compressor and diesel exhaust and other types of pURPOSE muffler, welcome user information, buy.
Acoustic impedance flow type fan muffler (silencer fan) series and dimensions:
3、Ventilation, exhaust fan muffler (silencer) and fan muffler Ordering Information:
1 muffler (silencer) objects and installation location to facilitate the company to choose the best model for your muffler plant 2 interface dimensions for easy connection to your plant site installation 3 Air flow m3 / H, m3 / min or m3 / sec 4 pressure Pa, <, / SPAN> KPa, MPa | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
  | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 |
|
