Noise Source Analysis of Air Compressor

　　空压机是一种噪声较大的设备。在室外安装时，dh90-1离心式空气压缩机在2m处的噪声为114.5db (A)。

　　Air compressor is a kind of equipment with high noise. When installed outdoors, the noise of dh90-1 centrifugal air compressor at 2m is 114.5db (A).

　　空压机噪声包括空气动力噪声、机械噪声和电磁噪声。辐射噪声可分为:空压机机体噪声源;电机噪声源;进气管噪声源;进气口噪声源;排气管噪声源;排气噪声源。采用近场法对各部件的噪声频谱进行了测量，表明该空压机的噪声为中高频噪声。

　　The noise of air compressor includes aerodynamic noise, mechanical noise and electromagnetic noise. Radiated noise can be divided into: air compressor body noise source; motor noise source; intake pipe noise source; intake port noise source; exhaust pipe noise source; exhaust noise source. The noise spectrum of each component is measured by the near field method, which shows that the noise of the air compressor is medium and high frequency noise.

　　二、控制空压机机体噪声和电机噪声，合理的措施是为空压机增设隔音罩。为确保隔音罩的降噪效果，应注意:

　　2. The most reasonable measure to control the noise of the air compressor body and motor is to add a sound insulation cover for the air compressor. In order to ensure the noise reduction effect of the sound insulation cover, attention should be paid to:

　　1. 外壳壁数据应具有足够的隔声能力。本工程采用多层隔声结构，设计隔声能力为30dB (A)。

　　1. Shell wall data should have adequate sound insulation. This project adopts multi-layer sound insulation structure, and the designed sound insulation capacity is 30dB (A).

　　济南空压机

　　Jinan air compressor

　　2. 门、窗、孔等隔音薄件的处理。在本工程中，门、采光窗和通风口应安装消声器。消声器结构的两个设计值为25dB (A)。

　　2. Processing of sound-proof thin parts such as doors, windows and holes. In this project, mufflers should be installed on doors, lighting windows and ventilation outlets. The two design values of muffler structure are 25dB (A).

　　3.内墙吸声处理较强。本项目采用50mm厚离心玻璃棉毡作为吸声数据，其高频吸声性能优异，符合要求的控制噪声频率特性。为了增加低频吸声，在吸声数据后留下50mm厚的空气层。

　　3. The sound absorption treatment of the inner wall is strong. In this project, 50 mm thick centrifugal glass wool felt is used as sound absorption data. Its high frequency sound absorption performance is excellent, and it meets the requirements of controlling noise frequency characteristics. In order to increase low frequency sound absorption, 50 mm thick air layer is left after sound absorption data.

　　由于消费者的需求，空压机无法关闭。在设计中，应用了原气动拧紧机的钢筋混凝土座椅，将隔声罩加成两部分。由于采用了钢筋混凝土支座的支撑，使得隔声罩的主龙骨结构得到简化，便于机器运行时的施工。隔音罩下部70%可采用砖墙，节约管理资金。为了满足设备的维修要求，阀盖是可拆卸的，以便于机械操作的举升;隔声罩下设计有声门，便于管理人员出入和维护。

　　Because of the demand of consumers, the air compressor can not be shut down. In the design, the reinforced concrete seat of the original pneumatic tightener is applied, and the sound insulation cover is added into two parts. Because of the support of reinforced concrete support, the main keel structure of the sound insulation cover is simplified, which is convenient for the construction of machine operation. 70% of the lower part of the sound insulation cover can use brick wall, saving management funds. In order to meet the maintenance requirements of the equipment, the valve cover is removable to facilitate the mechanical operation of lifting; the glottis under the sound insulation cover is designed to facilitate access and maintenance of managers.

　　济南空压机

　　Jinan air compressor

　　空压机隔声罩是一个整体结构

　　The sound insulation cover of air compressor is an integral structure.

　　空压机进气口消声设计

　　Design of Inlet Noise Muffler for Air Compressor

　　空压机空气滤清器可以降低进气口的噪声，但不能满足降噪的要求。进气滤清器1m处测得的噪声为96dB (A)，根据现有条件百叶帘的穿孔率为12%。离心玻璃棉用于百叶吸声数据。玻璃棉不吸水，不受雨水影响性能。适合户外使用。百叶孔降噪能力为12dB(A)。

　　The air filter of air compressor can reduce the noise of air intake, but it can not meet the requirement of noise reduction. The noise measured at 1m of the intake filter is 96 dB (A), and the perforation rate of the blinds is 12% according to the existing conditions. Centrifugal glass wool is used for louver sound absorption data. Glass wool does not absorb water and is not affected by rainwater. Suitable for outdoor use. The noise reduction ability of louver hole is 12 dB (A).

　　以上是济南空压机厂家为大家整理的相关内容，希望能帮到大家，我们的网站是http://www.jnkbjx.com，欢迎大家来电咨询。

　　The above is the relevant content of Jinan air compressor manufacturers for you, hope to help you, our website is http://www.jnkbjx.com, welcome to inquire.