高压星型空压机噪声分析与控制研究

发布时间：2018-06-01 03:30

本文选题：空压机 + 噪声控制　；参考：《合肥工业大学》2014年硕士论文

【摘要】：空压机是量大而面广的通用机械,广泛应用于机械、矿山、化工及建筑等部门,它所产生的噪声级别特别高、影响大,是环境噪声的污染源之一。而本文涉及的高压星型空压机应用在船舶上,噪声不但会引起船舶上一些结构的声振疲劳破坏,而且会对船舱内各种仪器、设备等的正常工作造成一定影响,降低船舶及设备的使用效果、减少船舶及设备的使用寿命,因此研究高压星型空压机噪声超标的原因并对其进行治理是尤为重要。本文按照GJB4058-2000对高压星型空压机进行噪声测试,发现其噪声值超标,分析噪声测量数据,得出进气噪声是空压机主要噪声源的结论,提出了通过设计合理消声器来降低空压机噪声的方法。测量了空压机进气噪声的频谱,得到主要消声频段。通过声学仿真软件LMS Virtual. Lab,分析了不同结构参数对消声器传递损失的影响,结合空压机进气噪声的频谱特性,设计得到空压机进气消声器,并在LMS Virtual. Lab中计算了其传递损失,对于主要消声频带有很好的效果；在Fluent中计算了其压力损失,满足要求。同时将设计的消声器加工出来,安装到高压星型空压机的进气口,测试结果表明改进后的空压机的噪声达标。
[Abstract]:Air compressor is a kind of general machinery with large quantity and wide scope. It is widely used in machinery, mining, chemical industry and construction departments. It produces a high noise level and has a great impact. It is one of the pollution sources of environmental noise. However, when the high pressure star type air compressor is applied to ship, the noise will not only cause the damage of acoustic and vibration fatigue of some structures on the ship, but also affect the normal operation of various instruments and equipment in the cabin. It is very important to study the cause of high pressure star type air compressor noise exceeding the standard and to control it because of reducing the use effect of ship and equipment and reducing the service life of ship and equipment. In this paper, the noise of high pressure star type air compressor is measured according to GJB4058-2000, and its noise value is found to be over the standard. By analyzing the noise measurement data, the conclusion is drawn that the inlet air noise is the main noise source of the air compressor. The method of reducing the noise of air compressor by designing reasonable muffler is put forward. The frequency spectrum of air intake noise of air compressor is measured, and the main frequency band of noise suppression is obtained. Through acoustic simulation software LMS Virtual. The influence of different structure parameters on the transmission loss of muffler is analyzed. Combined with the spectrum characteristics of air intake noise of air compressor, the air compressor intake muffler is designed and fabricated in LMS Virtual. The transmission loss is calculated in Lab, which has a good effect on the main frequency band, and the pressure loss is calculated in Fluent to meet the requirements. At the same time, the designed muffler is machined and installed into the inlet of the high pressure star type air compressor. The test results show that the noise of the improved air compressor is up to standard.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535

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