Technical principle of ventilation duct silencer

根据各种工业风机运行现场噪声源的实际测试得到的频谱特性数据，确定所需的消噪量，其中频谱范围是设计吸声器和流体通道的主要依据。同时，采用带有较大吸声材料光洁度的窄矩形通道来增强吸声效果。另外，风机噪声源在大噪声级时，往往有一个以上的频谱值，不同的频谱波段对噪声的要求也不同。

According to the spectrum characteristic data obtained from the actual test of noise sources in the operation site of various industrial fans, the required noise elimination amount is determined, in which the spectrum range is the main basis for the design of sound absorber and fluid channel. At the same time, a narrow rectangular channel with large sound-absorbing material finish is used to enhance the sound-absorbing effect. In addition, when the fan noise source has a large noise level, it often has more than one spectrum value, and different spectrum bands have different requirements for noise.

因此，风机通风管道消声器和鼓式引风机消声器均为阻抗声流型。采用了对高、中频噪声具有吸声降噪作用的阻性结构和对中、低频噪声具有吸声降噪作用的抗阻结构。同时，在阻性通道中采用高频和低频吸声消声区，使消声频带变大，达到良好的降噪效果。

Therefore, the muffler of fan ventilation duct and the muffler of drum induced draft fan are impedance sound flow type. The resistive structure with sound absorption and noise reduction for high and medium frequency noise and the anti resistive structure with sound absorption and noise reduction for medium and low frequency noise are adopted. At the same time, high-frequency and low-frequency sound absorption and silencing areas are adopted in the resistive channel to increase the silencing frequency band and achieve good noise reduction effect.

通风管道消声器的应用及产品特点

Application and product characteristics of ventilation pipe muffler

风机是一种通用的机械设备，具有广泛的应用。电力、矿山、机械、冶金、化工等行业的销售都离不开风机。风机运行时产生的噪声往往成为影响工人健康和扰乱环境的灾难源。特别是生活区附近的风机进、出口辐射的气动噪声是污染环境的主要因素，形成公害。它是近年来我国工业部门噪声污染治理的主要目标之一。

Fan is a kind of general mechanical equipment, which has a wide range of applications. The sales of electric power, mining, machinery, metallurgy, chemical industry and other industries are inseparable from fans. The noise generated by fan operation often becomes a disaster source affecting workers' health and disturbing the environment. In particular, the aerodynamic noise radiated by the inlet and outlet of fans near the living area is the main factor polluting the environment and forms a public hazard. It is one of the main objectives of noise pollution control in China's industrial sector in recent years.

通风管道消声器的目的是为了降低通风管道风机的噪声。根据不久的特点从实际测试获得的数据操作的各种噪声源的球迷在发电厂,工厂需要数量决定了噪声光谱范围为主要依据的吸音表的设计结构和流体通道。同时，采用带有较大吸声材料光洁度的窄矩形通道，增强吸声效果。我们知道，当风机噪声源处于大噪声级时，往往有多个频谱值，不同的频谱波段对噪声的要求是不同的。因此，该产品采用了起降噪中高频率噪声作用的电阻结构和起降噪中低频率噪声作用的反结构。同时在阻性信道中采用高频和低频两种消声区，使消声频带变大，达到良好的消声效果。

The purpose of ventilation duct silencer is to reduce the noise of ventilation duct fan. According to the characteristics of the near future, the number of fans of various noise sources operating from the data obtained from the actual test in the power plant determines the design structure and fluid channel of the sound absorption meter based on the noise spectrum range. At the same time, a narrow rectangular channel with large sound-absorbing material finish is adopted to enhance the sound-absorbing effect. We know that when the fan noise source is at a large noise level, there are often multiple spectrum values, and different spectrum bands have different requirements for noise. Therefore, the product adopts the resistance structure of high-frequency noise in takeoff and landing noise and the anti structure of low-frequency noise in takeoff and landing noise. At the same time, high-frequency and low-frequency silencing areas are adopted in the resistive channel to enlarge the silencing frequency band and achieve good silencing effect.

本文由山东通风管道为您提供，我们的网站是：http://www.jntfgd.com我们将以全心全意的热情为您提供服务，欢迎您的访问！

This article is provided by Shandong ventilation duct. Our website is: http://www.jntfgd.com We will serve you with wholehearted enthusiasm. Welcome to visit!