In recent years, people have paid more and more attention to noise. The noise of Roots blower is also a kind of environmental pollution. Environmental protection inspectors have also ordered some noisy industrial enterprises to rectify or stop production for rectification. However, the noise of Roots blower cannot be avoided when it is started. How can we not only ensure the normal operation of the machine, but also reduce the noise pollution and avoid the trouble caused by noise.
This requires Roots blower silencer to reduce noise. How many types of Roots blower silencer are there? Let's talk about it in detail:
Muffler is a device that not only allows air flow, but also attenuates or blocks noise transmission. It is simple and effective to use muffler to control aerodynamic noise. Silencers are usually installed in the air inlet or exhaust pipe of the blower, which can greatly reduce the noise radiated from the air inlet or transmitted in the pipe.
There are many types of silencers, such as resistance, resistance and impedance composite, among which the resistance silencer is the most widely used. The basic requirements for various silencers are:
① Good acoustic performance, large noise elimination, low air flow regeneration noise;
② Good aerodynamic performance and small resistance loss;
③ Good structural performance, no rust on internal parts, no leakage of filling materials, convenient installation and maintenance, etc.
1. Resistive silencer
The dissipative muffler is a kind of device that makes use of the sound absorption effect of sound absorption materials to make the noise transmitted along the channel continuously absorbed and gradually attenuated. The sound absorbing materials are fixed on the surrounding wall of the pipe through which the air flows, or arranged in a certain way in the pipe to form a resistive muffler. The commonly used sound absorbing materials are glass wool, foam plastic, etc., which are porous materials. When sound waves are emitted by humans, they will cause air and fiber vibration in porous materials. Due to the effect of friction and viscous resistance, part of the sound energy will be converted into heat energy and dissipated to achieve the purpose of noise elimination.
2. Reactive silencer
Reactive muffler is a kind of equipment that can eliminate noise by controlling acoustic reactance. This muffler does not use sound absorbing materials to directly absorb sound energy, but uses the sudden expansion and contraction of the pipe section to make the noise transmitted along the pipe reflect back to the sound source at the abrupt change; Or, with the help of the resonant cavity next to the pipe, the noise of a certain frequency propagating along the pipe is shorted in the resonant cavity, so as to reduce it.
The reactive muffler is mainly applicable to the elimination of narrow-band noise. For Roots blower, its intake and exhaust noise have obvious broadband characteristics (the low-frequency characteristics of intake noise is slightly stronger). Therefore, the noise elimination effect of reactive muffler is not as good as that of resistive muffler, and its size (volume) is relatively large. However, when resistive muffler is not suitable for use, it is mainly used in some occasions where fiber material is not allowed to escape, so reactive muffler is a common structural type.
3. Impedance composite muffler
The resistive muffler has a good effect on middle and high frequency noise elimination. The reactive muffler is suitable for eliminating narrowband noise in the low and medium frequency range. The combination of the two can form an impedance composite muffler. When roots blower has high intensity broadband noise, this muffler can be used to control noise.
Xinqian Shun Fan has been producing roots blowers for more than 10 years. If you have any questions about the purchase of roots blowers, you can contact our national free customer service hotline: 0531-83663588
Recommended reading: Roots blower Roots blower silencer is a silencer installed on roots blower to reduce dynamic noise of roots blower. Roots blower can effectively reduce the noise value of blower. Let's understand the silencer of Roots blower!
1. Roots blower silencer is also called silencer. According to the different structures, it can be divided into circular and rectangular silencers. Our Jingong silencer is mainly a round silencer, which has obvious noise reduction effect.
2. In addition to using silencers to reduce noise, we can also choose to equip silencing rooms for Roots blower. The multi-function anechoic chamber can effectively reduce the noise of roots blower. At the same time, it can also be operated on the external computer screen to complete various functions of the blower.
3. The roots blower noise reduction equipment shall be equipped according to the size of roots blower. If there are special requirements for the noise of Roots blower when purchasing, we need to tell the manufacturer of Roots blower how many decibels we need to control the noise. monitor.
First, I will give you a reference value! Below 40 decibels, there is no sound. From 60 decibels to 80 decibels, it is about the noise of ordinary vehicles, while from 80 decibels to 100 decibels, it is the noise of ordinary nightclubs. Usually, 70 to 100 decibels will affect our normal life.
After all, silencer is a device that allows air flow but can prevent and reduce sound transmission. It is an important product to eliminate aerodynamic noise. Silencers can block the propagation of sound waves and allow air to flow, which is an effective noise control tool. There are many types of silencers. According to the silencing mechanism, they can be divided into six main types: resistance silencers, heavy-duty silencers, impedance composite silencers, microporous silencers, orifice silencers and active silencers. If you choose, you can also choose high-quality Roots blower silencer according to your mechanical equipment.
The above is the selection skill of Roots blower silencer. When purchasing, users need to provide the inlet and outlet dimensions and air volume of Roots blower. Normally, roots blower silencer is installed on the socket. The silencer of Roots blower shall be treated comprehensively, that is, the silencer and sound insulation room shall be installed at the same time. I hope the above introduction can help you
