Reactive muffler structure capable of adjusting punching rate

Abstract

The invention discloses a reactive muffler structure capable of adjusting the punching rate. The reactive muffler structure comprises an inner perforated cylinder fixedly connected with a pipeline system, an outer perforated cylinder is connected to the outer side surface of the inner perforated cylinder in a sleeving mode, a shell is connected to the outer side surface of the outer perforated cylinder in a sleeving mode, a plurality of first through holes are evenly formed in the pipe wall of the inner perforated cylinder from one end to the other end, a plurality of second through holes corresponding to the first through holes are formed in the outer perforated cylinder, the shell covers the plurality of second through holes, threads are formed in the outer side surfaces of the two ends of the inner perforated cylinder, and nuts are connected to the two ends of the inner perforated cylinder in a threaded mode. The structure has the advantages that the size of an air chamber behind a perforated pipe is not changed in the adjusting process, large-ratio adjustment can be achieved just through small displacement, and the structure is simple and reliable, high in adjusting sensitivity and precision and higher in application value.

Description

technical field [0001] The invention relates to the technical field of mufflers, in particular to a resistant muffler structure with adjustable perforation rate. Background technique [0002] Mufflers are commonly used to reduce noise associated with combustion engine exhausts, high pressure gas or steam vents, compressors and fans. The sound dampening device allows the passage of fluid while restricting the free passage of noise. In the air flow pipeline, the vibration noise has not been well controlled, and it is the most widely used method when installing a muffler in the fluid pipeline system. The traditional muffler has a good noise reduction effect for a certain frequency band, but in rotating machines, the frequency of the piping system generally changes with the speed. In this case, the traditional muffler structure is difficult to ensure that the machine is running It has better noise reduction effect. Academician Ma Dayou proposed the micro-perforated plate soun...

AI Technical Summary

Problems solved by technology

[0003] The currently published patented technology, from the principle point of view, not only changes the perforation rate, but also changes the volume of the air chamber, reducing the effective working length of the perforation structure; from the structural point of view, there are many transmission links, resulting in the sensitivity of the adjustment Low, small range, poor reliability, and large structure, not strong adaptability

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