Detachable metal sintering silk screen noise reduction device

Abstract

The invention discloses a detachable metal sintering silk screen noise reduction device. The noise reduction device comprises a number sign-shaped supporting frame installed in a pipeline, a pluralityof metal sintering silk screen modules and a plurality of front pressing plates; each metal sintering screen mesh module comprises a front grid frame, M layers of metal sintering silk screens and a rear grid frame, the front grid frame is used for restraining back pressure impact deformation, the rear grid frame is used for restraining airflow direction impact deformation, the M layers of metal sintering silk screens are metal sintering silk screens which are stacked together through laser sintering and are used for pneumatic noise reduction in a wide frequency domain, and frame strips, located between the front grid frame and the rear grid frame, of the front grid frame and the rear grid frame are opposite in position and fixed together; the plurality of metal sintering silk screen modules are fixed on the number sign-shaped supporting frame by the plurality of front pressing plates through screws; and concave-convex structures of different structures are machined on the periphery ofthe metal sintering silk screen modules, and the blocking ratio of the number sign-shaped frame can be reduced through concave-convex connection. According to the noise reduction device, the structure is reasonable and simple, dismounting and mounting are convenient, the noise reduction frequency band is wide, and large impact loads can be borne.

Description

technical field [0001] The invention relates to a detachable metal sintered wire mesh noise reduction device, which is a noise reduction device installed and applied to flowing gas in a pipeline, and belongs to the field of experimental aerodynamics. Background technique [0002] A high-quality flow field in a wind tunnel requires low noise and low turbulence. The noise reduction methods for the transient high-speed wind tunnel pressure regulating valve mainly include laying multi-layer orifice plates and resonant cavity type plate mufflers. The noise reduction of the multi-layer orifice plate is not obvious, mainly relying on the resonant cavity type chip muffler. The pressure loss of the chip muffler is small, and it has a good noise reduction effect for the middle and high frequency bands around 4000Hz. However, there are problems such as large structural blocking ratio, large space occupation, regenerative noise, weakened noise reduction effect at high speed, and small...

AI Technical Summary

Problems solved by technology

However, there are problems such as large structural blocking ratio, large space occupation, regenerative noise, weakened noise reduction effect at high speed, and small low-frequency noise reduction.

Moreover, the resonant cavity-type chip muffler is installed once, and the noise reduction effect is reduced after long-term use. Later maintenance often requires production shutdown, dismantling and maintenance, which is difficult to maintain. For large-sized wind tunnels, the maintenance cost is huge

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