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Novel exhaust silencer special for removing high-frequency noise

An exhaust muffler, high-frequency noise technology, applied in muffler devices, machines/engines, engine components, etc., can solve the problems of unsatisfactory high-frequency noise muffling effect, no resistive sound-absorbing materials are arranged, etc., to achieve sound muffling good effect, good effect

Inactive Publication Date: 2015-01-07
ZHUCHENG HAIDEWEI MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-frequency noise, because the number of perforated pipe sections and perforated plates that are good at high-frequency noise attenuation is small, and there is no resistive sound-absorbing material that is good at high-frequency noise attenuation, it is not effective for high-frequency noise. The noise reduction effect of frequency noise is not ideal

Method used

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  • Novel exhaust silencer special for removing high-frequency noise
  • Novel exhaust silencer special for removing high-frequency noise

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Experimental program
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Effect test

Embodiment Construction

[0010] Such as figure 1 , 2 As shown, the front partition 1 and the rear partition 2 of the present invention divide the interior of the cylinder body 3 into a first chamber 4, a second chamber 5 and a third chamber 6, and an air inlet is installed laterally inside the first chamber 4 Diffusion pipe 7, one end of the air intake diffusion pipe 7 is closed, and an air outlet diffusion pipe 8 is horizontally installed in the inside of the third chamber 6, and one end of the air outlet diffusion pipe 8 is closed, between the intake air diffusion pipe 7 and the air outlet diffusion pipe The outer surfaces of 8 are respectively provided with ventilation nets, and two intermediate pipes 9 are installed between the front partition 1 and the rear partition 2, so that the first cavity 4 and the third cavity 6 are connected.

[0011] Through the above settings, the noise of the engine exhaust pipe enters the first chamber 4 through the ventilation net on the outer surface of the intake ...

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Abstract

The invention provides a novel exhaust silencer special for removing high-frequency noise. The novel exhaust silencer is characterized in that the interior of a cylinder is divided into a first cavity, a second cavity and a third cavity by use of a front separator and a rear separator, an inlet diffuser is transversely mounted inside the first cavity, one end of the inlet diffuser is closed, an exhaust diffuser is transversely mounted inside the third cavity, one end of the exhaust diffuser is closed, a ventilation net is arranged on the outer surface of each of the inlet diffuser and the exhaust diffuser, and two middle tubes are mounted between the front separator and the rear separator so that the first cavity and the third cavity can be communicated with each other.

Description

technical field [0001] The invention relates to an engine exhaust muffler, in particular to a novel special exhaust muffler for removing high-frequency noise. Background technique [0002] At present, the existing engine exhaust muffler mainly adopts the resistant exhaust muffler structure of pipe cross-section expansion and cross-section contraction. Due to the change of acoustic reactance at the sudden change of the section of the sound wave, part of the sound wave is reflected back to the sound source without passing through the muffler. The outlet, so as to achieve the purpose of noise reduction. This kind of resistant exhaust muffler has a good noise reduction effect on middle and low frequency noise. As for high-frequency noise, because the number of perforated pipe sections and perforated plates that are good for high-frequency noise attenuation is small, and there is no resistive sound-absorbing material that is good for high-frequency noise attenuation, it is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/08
Inventor 鞠焕鹏袁军
Owner ZHUCHENG HAIDEWEI MACHINE