Pipe multilayer micro perforated plate silencer and machining method thereof

Abstract

The invention is suitable for the field of the acoustic technique, and provides a pipe multilayer micro perforated plate silencer. The pipe multilayer micro perforated plate silencer comprises an outer pipe and micro perforated pipes. The multiple micro perforated pipes are arranged and are arranged on the outer pipe in the radial direction of the outer pipe, and the multiple micro perforated pipes are nested in sequence and used for silencing. The two ends of the outer pipe are closed, and an avoiding hole communicating with the micro perforated pipe located on the innermost layer is formed in the outer pipe. The pipe multilayer micro perforated plate silencer has the beneficial effects that super micropore plates are adopted inside, no fiber sound absorption material is adopted, and thepipe multilayer micro perforated plate silencer has the advantages of being long in service life, free of pollution and resistant to high temperature, dampness and high-speed airflow impacting and isespecially suitable for occasions with high requirements for the environment and occasions with severe environments; and the multiple layers of micropore plates are connected in parallel, the attribute and interlayer spacing of the multiple layers of micropore plates are subjected to acoustic design, and therefore the silencing audio frequency of the silencer is widened, and the silencing performance is improved.

Description

technical field [0001] The invention relates to the technical field of acoustics, in particular to a pipe multi-layer micro-perforated plate muffler and a processing method thereof. Background technique [0002] During the noise development process of the turbocharger, it is necessary to eliminate the reflection noise caused by the work of other turbochargers in the test system. Due to the influence of high-temperature and high-flow airflow in the test system, when the air volume of the traditional resistive muffler is large, it is easy to cause high airflow regeneration noise and reduce the noise reduction performance of the muffler. The micro-perforated plate muffler uses the internal micro-perforated plate to resonate and absorb sound under certain cavity conditions, without the need for traditional porous sound-absorbing materials, and solves the problems of airflow regeneration noise increase and temperature limitation. [0003] However, the traditional single-layer mi...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a pipe multi-layer micro-perforated plate muffler and its processing method, aiming to solve the problems of the traditional single-layer micro-perforated plate muffler with low muffler volume and narrow muffler band

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