Self-adaption intake muffler

Abstract

The invention discloses a self-adaption intake muffler with a self-adaption function, and relates to the muffler used for inhibiting noises of an air intake pipeline. The muffler is composed of left and right adjacent resonant cavities, the interior space of a shell body of the muffler is partitioned into the two resonant cavities through a partition plate between the resonant cavities, and the two resonant cavities are separately connected with a main pipeline through respective pipelines; a rail groove is formed in the inner side of the shell body of the muffler, the shell body of the muffler and the partition plate between the resonant cavities can move relative to the main pipeline, and the motion ranges of the shell body of the muffler and the partition plate can be controlled by springs. According to different pressures generated from different flowing speeds of a medium on an air intake main pipeline, the shell body of the muffler and the partition plate between the resonant cavities move along the formed rail groove, structure parameters of the two resonant cavities can be adjusted in a self-adaption mode to eliminate air intake noises of a corresponding frequency at different flowing speeds, and an excellent noise inhibiting effect of the muffler can be achieved under the more comprehensive working condition.

Description

technical field [0001] The invention relates to the field of pipeline noise, in particular to a muffler for suppressing the noise of an intake pipeline. Background technique [0002] The resonance cavity is a traditional pipe noise suppression device, and its basic structure is as follows: figure 1 shown. The main pipeline 6 is connected with the resonant cavity 2 through the bypass pipeline 5 . The air column in the side branch pipe 5 has a certain sound quality similar to a piston, and the air in the resonance chamber 2 has a certain stiffness like a spring, and the two form a resonance system. When the sound wave is transmitted along the main pipeline 6 to the intersection with the side branch pipeline 5, the air column vibrates under the action of the sound wave, and resonance occurs when the frequency of the sound wave is close to the natural frequency of the system, and the frictional damping during resonance converts a large amount of sound energy Dissipated for he...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the traditional resonant cavity muffler is that it can only have a good noise reduction effect on the noise whose frequency is near the natural frequency, and once the size parameters of the resonant cavity are determined, the natural frequency of the resonant cavity muffler is also determined and cannot be changed again, so Its effective frequency range is relatively single, and it cannot adapt to the actual situation that the medium has different noise frequencies at different flow velocities

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