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本文叙述了涡轮增压器的噪声分布概况,提出了选择降噪对象的原则,并介绍了降噪手段,包括:解释了一种新型的压气机消声器的工作原理;谈到了它的设计要点以及讨论了涡轮增压器中的管道噪声的防治问题.涡轮增压器是一种高速旋转的叶片机械,运转时发出的噪声不仅声级大,而且频率高,是增压柴油机组的主要噪声源.以261P涡轮增压器为例,高压气机进口1m处的噪声最高达123dB(A).其频谱峰值在8000Hz处为121dB;在对人耳最为敏感的中心频率4000Hz处为115.9dB,均达痛阈声级,严重污染环境,危害人体健康.为此,努力降低涡轮增压器的噪声已成为保护环境的当务之急.
This paper describes the noise profile of the turbocharger, proposes the principle of noise reduction object selection, and introduces the noise reduction methods, including: explains the working principle of a new type of compressor silencer; talked about its design points and Discusses the prevention and control of the pipeline noise in the turbocharger.Turbocharger is a kind of high-speed rotation vane machinery, which not only has sound level but also high frequency, which is the main noise source of turbocharged diesel engine unit Taking a 261P turbocharger as an example, the noise at 1m inlet of a high-pressure compressor is up to 123dB (A), its peak is 121dB at 8000Hz and 115.9dB at 4000Hz, the center frequency most sensitive to the human ear Tara pain threshold level, serious pollution of the environment, endangering human health.To this end, efforts to reduce the turbocharger noise has become a top priority for environmental protection.