High-frequency silencer applied to air feeding tubes of automobile intercooler

Abstract

The invention discloses a high-frequency silencer applied to air feeding tubes of an automobile intercooler. The high-frequency silencer applied to the air feeding tubes of the automobile intercooler comprises the intercooler air feeding tubes, wherein a main pipeline is connected to the intercooler air feeding tubes; an opening is axially formed in one side of the wall of the main pipeline, and a housing which is of a chamber structure is mounted at the opening and used for sealing the opening; a plurality of separating plates which are axially arranged at intervals are radially arranged at the inner edge of the housing and can axially form a plurality of resonant cavities in the inner edge of the sealed housing along the main pipeline; the resonant cavities communicate with the main pipeline. With the adoption of the high-frequency silencer applied to the air feeding tubes of the automobile intercooler, the silencing frequency range can be expanded within a limited cabin space, thus the silencing performance is improved, and the squeal, surge and other high-frequency noises generated in the working process of a turbocharger can be effectively reduced.

Description

technical field [0001] The invention relates to the field of automobile mufflers, in particular to a high-frequency muffler used on the intake pipe of an automobile intercooler. Background technique [0002] With the application of turbocharging technology in automobile engines, while improving the power performance of automobiles, the whistling and surge high-frequency noise generated by the turbines are becoming more and more prominent, and gradually become the main contributors to the noise inside the car. The frequency of this noise is mainly concentrated in the range of 1200Hz-2500Hz, some even reach 3000Hz, and the frequency coverage is extremely wide. How to reduce the whistling and surge noise generated during the working process of the turbine and improve the sound quality of the car is particularly important. At present, there are mainly the following ways to solve high-frequency noise: [0003] (1) Add multiple (usually four) quarter-wavelength tubes to the inta...

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Problems solved by technology

[0004] (2) see Figure 5 , three resonant cavities (or more than three) are arranged side by side on the intake pipe 1 of the intercooler to form a high-frequency resonant cavity. The inlet pipe of the cooler is connected, and the noise reduction effect of the high-frequency resonance cavity is obviously better than that of the quarter-wavelength tube, and there is no passing frequency. The number of the resonance cavity determines the number of noise reduction peaks, and the diameter of the radial small circular , the number and the volume of the resonance cavity together determine the bandwidth of a single anechoic peak. The more the number of resonant cavities, the more the number of anechoic peaks, which can widen the anechoic bandwidth to a certain extent; if the original resonance cavity is maintained The number remains the same. In the case of increasing the axial length (cavity length), optimizing the number and diameter of small round through holes can also widen the noise reduction bandwidth to a certain extent, but this high-frequency resonant cavity will also Restricted by the layout of the engine room, its radial dimension and axial length can only be within a certain size range, which affects the number of cavities of the resonant cavity and the number of small round through holes, so that the anechoic frequency band cannot cover the required frequency range well , can not achieve a good noise reduction effect

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