专注通风管道加工·排烟罩

　　消声器是利用声的吸收、反射、干涉等原理，降低通风与空调系统中气流噪声的装置。根据消声原理的不同可以分为阻性、抗性、共振型和复合型等。下面为大家介绍一下消声器分类有哪些。

Silencers are devices that use principles such as sound absorption, reflection, and interference to reduce airflow noise in ventilation and air conditioning systems. According to the different principles of noise reduction, it can be divided into resistance, resistance, resonance, and composite types. Below, we will introduce the classification of mufflers.

　　一、阻性消声器

1、 Resistive muffler

　　阻性消声器利用吸声材料的吸声作用而消声的。其构造是把吸声材料固定在气流流动的管道内壁，或按一定方式排列在管道或壳体内构成阻性消声器，吸声材料能够把入射在其上的声能部分地吸收掉。声能之所以能被吸收，是由于吸声材料的多孔性和松散性。

A resistive muffler uses the sound absorption effect of sound-absorbing materials to eliminate noise. Its structure is to fix the sound-absorbing material on the inner wall of the airflow pipeline, or arrange it in a certain way inside the pipeline or shell to form a resistive muffler. The sound-absorbing material can partially absorb the sound energy incident on it. The reason why sound energy can be absorbed is due to the porosity and looseness of sound-absorbing materials.

　　它对于高频和中频噪声效果较好，但对低频噪声消声性能较差。

It has good effects on high-frequency and intermediate frequency noise, but poor noise reduction performance on low-frequency noise.

　　二、共振型消声器

2、 Resonant silencer

　　吸声材料通常对低频噪声的吸收能力很低，单靠增加吸声材料的厚度来提高吸声效果并不经济，为了改善低频噪声的吸声效果，通常采用共振型消声器。共振型消声器的形式是利用管道开孔与共振腔相连接，利用小孔处的空气柱和空腔内的空气构成了弹性共振系统，当外界噪声频率和此共振系统的固有频率相同时，小孔中的空气柱发生共振并与孔壁发生剧烈摩擦，摩擦可以消耗声能，从而达到消声的目的。

Sound absorbing materials usually have a low absorption capacity for low-frequency noise. It is not economical to improve the sound absorption effect solely by increasing the thickness of the sound absorbing material. In order to improve the sound absorption effect of low-frequency noise, resonant silencers are usually used. The form of resonant muffler is connected to the resonant cavity through a pipeline opening, and an elastic resonance system is formed by using the air column at the small hole and the air inside the cavity. When the external noise frequency is the same as the natural frequency of the resonance system, the air column in the small hole resonates and experiences severe friction with the hole wall. Friction can consume sound energy, thereby achieving the purpose of noise reduction.

　　这种消声器具有较强的频率选择性，即有效的频率范围很窄，一般对于低频消声可以产生较大的衰减。其气流阻力小，但因有共振腔而使结构偏大。

This type of muffler has strong frequency selectivity, that is, the effective frequency range is very narrow, and generally can produce significant attenuation for low-frequency noise reduction. Its airflow resistance is small, but the structure is larger due to the presence of a resonant cavity.

　　三、抗性消声器

3、 Resistance silencer

　　抗性消声器由管和小室相连而成，该消声器使利用风管截面的突然改变而使声波向声源方向反射回去而起到消声作用。

A resistance muffler is composed of a tube connected to a small chamber, which uses a sudden change in the cross-section of the air duct to reflect sound waves back in the direction of the sound source, thus playing a silencing role.

　　该消声器对中、低噪声有较好的消声效果，结构简单，由于不使用吸声材料，因而不受高温和腐蚀性气体的影响。低频噪声有一定效果。

This muffler has a good noise reduction effect on medium and low noise levels, with a simple structure. As it does not use sound-absorbing materials, it is not affected by high temperatures and corrosive gases. Eliminating low-frequency noise has a certain effect.

　　四、复合型消声器

4、 Composite muffler

　　复合型消声器集中了阻性和膨胀型消声器的优点，对低频到高频区噪声均具有良好的消声效果。此外对于不能使用纤维吸声材料的空调系统（如净化空调工程），用金属（铝等）结构的微穿孔板消声器可获得良好的效果。

Composite silencers combine the advantages of resistive and expansion silencers, and have good noise reduction effects in the low-frequency to high-frequency range. In addition, for air conditioning systems that cannot use fiber sound-absorbing materials (such as purification air conditioning engineering), using micro perforated plate silencers with metal (aluminum, etc.) structures can achieve good results.

以上是关于 山东通风管道加工 的介绍，若想了解相关知识可请点击：http://www.jnqsg.com 我们将会全心全意为您提供满分服务，欢迎您的来电！

The above is an introduction to the processing of ventilation ducts in Shandong. If you want to learn more about related knowledge, please click: http://www.jnqsg.com We will wholeheartedly provide you with full score service. Welcome to call us!

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