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Resonant silencer

A muffler and resonant cavity technology, applied in muffler devices, machines/engines, engine components, etc., can solve the problems that the muffler cannot achieve the noise reduction effect, the volume of the muffler is large, and the noise reduction cost is high.

Inactive Publication Date: 2016-05-18
SHANGHAI LIGER POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This noise reduction measure requires a certain number and size of chambers to achieve the noise reduction goal. When the noise reduction requirement is high, the volume of the muffler is relatively large, so the configuration of a conventional muffler in a confined space may not achieve the obvious or required noise reduction effect. , and the cost of noise reduction is high

Method used

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Embodiment Construction

[0016] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

[0017] Such as figure 1 and figure 2 As shown, the resonance muffler is an assembly composed of metal plates. This embodiment shows that it adopts a cylindrical shape, but it is not limited to this, and it can also be made into a square, oblate or other outer shell. . The main components include:

[0018] Part 1, the lower end cap used to seal the cylinder port;

[0019] Part 2, the sound-absorbing layer near the air inlet made of fireproof fiber or hollow structural material;

[0020] Item 3, the microporous thin metal plate used to seal the sound-absorbing layer;

[0021] Item 4-1 and Item 4-2, two microporous thin metal plates with different apertures constituting the resonant cavity;

[0022] Part 5, the air outlet pipe of the muffler, the air inlet end of the pipe body is equipped with a number of suitable air inle...

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Abstract

The invention discloses a resonant silencer. According to the invention, a resonant cavity (plate body) using a Helmholtz resonance principle for silencing, having a microwell plate high-frequency filter silencing function, and composed of two closely adjacent microplates, is arranged in the inner cavity of a silencer of an engine in a co-cavity accommodating manner. When a high-speed airflow passes through the resonant cavity, a high-frequency filtering effect is generated and a dynamic silencing air column layer of the Helmholtz resonance principle is formed for filtering and absorbing high-frequency noise of the engine; and efficient noise reduction of the silencer of the engine under the condition of a small structure space is realized and an exhaust back pressure of the engine is reduced under the co-action of the co-cavity expansion and expansion reverberation of the airflow, and the resistive sound absorption of sound absorption layers on the two end parts of the silencer, and the output power of the engine is improved as well.

Description

technical field [0001] The invention relates to a muffler structural device for internal combustion engine exhaust gas emission made by utilizing the principle of Helmholtz resonance and the high-frequency filtering and muffler function of a microporous plate. The built-in high-speed airflow resonant cavity (plate) is the basic Structural features and core devices. Background technique [0002] Generally, exhaust emission mufflers (hereinafter referred to as mufflers) of internal combustion engines (including gasoline engines, diesel engines, gas engines, etc., hereinafter referred to as engines) are divided into three types: resistive, resistive, or impedance mixed, and are widely deployed in automobiles, Engineering vehicles, internal gas power tools and other internal combustion power devices, and become an essential device. According to actual needs and possibilities, the muffler will be designed in cylindrical, square, flat, box or return pipe shapes. According to the...

Claims

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Application Information

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IPC IPC(8): F01N1/04
Inventor 顾爱新
Owner SHANGHAI LIGER POWER TECH
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