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Resistive silencing device

A sound-absorbing device and resistive technology, which is applied in the direction of sound-absorbing devices, exhaust devices, engine components, etc., can solve the problems of sound-absorbing material burning and affecting driving safety, etc., to improve sound-absorbing performance, high heat transfer efficiency, and solve porous sound-absorbing layer Effects of combustion and deformation of porous sound-absorbing layers

Inactive Publication Date: 2017-04-05
CHONGQING ZHANRUI AUTOMOBILE FITTING FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resistive muffler has a good effect on middle and high frequency noise reduction, but it will generate a lot of heat energy during its working process, which will easily cause the sound-absorbing material to burn and affect driving safety.

Method used

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  • Resistive silencing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the resistive sound-absorbing device includes a cylinder body 1, a porous sound-absorbing layer 2 and an inner heat-conducting block 3; the porous sound-absorbing layer 2 is arranged on the inner surface of the cylinder body 1, and a plurality of inner heat-conducting blocks 3 are embedded in the porous sound-absorbing layer 2, The inner heat conduction block 3 is in contact with the inner surface of the cylinder body 1 .

[0023] When working, sound waves enter the cylinder body 1, and a part of the sound energy is converted into heat energy by friction in the pores of the porous sound-absorbing layer 2 and dissipated, so that the sound waves passing through the muffler are weakened, and the heat generated during this period is transferred to the cylinder through the inner heat conducting block 3 Body 1, so that the heat can be effectively dissipated. Due to the low heat conduction efficiency of the porous sound-absorbing layer 2 , heat accu...

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PUM

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Abstract

The invention discloses a resistive silencing device. The resistive silencing device comprises a tube body, a porous sound absorbing layer and a plurality of inner heat conduction blocks. The porous sound absorbing layer is arranged on the inner surface of the tube body, and the inner heat conduction blocks are inlaid in the porous sound absorbing layer. The inner heat conduction blocks make contact with the inner surface of the tube body. According to the resistive silencing device, the additionally-arranged inner heat conduction blocks have high heat conduction efficiency, part of heat can be quickly conducted to the tube body, and therefore the heat can be effectively emitted out, and the problems of combustion and deformation of the porous sound absorbing layer due to the excessively-high inner temperature of a resistive silencer are solved.

Description

technical field [0001] The invention relates to a noise reduction device, in particular to a resistive noise reduction device. Background technique [0002] The mufflers commonly used in automobiles are mostly resistive mufflers. Resistive mufflers mainly use porous sound-absorbing materials to reduce noise. Fixing the sound-absorbing material on the inner wall of the airflow channel or arranging it in a certain way in the pipeline constitutes a resistive muffler. When the sound wave enters the resistive muffler, part of the sound energy is rubbed in the pores of the porous material and converted into heat energy and dissipated, which weakens the sound wave passing through the muffler. The resistive muffler has a good effect on middle and high frequency noise reduction, but it will generate a lot of heat energy during its work, which will easily cause the sound-absorbing material to burn and affect driving safety. At the same time, a large amount of heat energy can easily...

Claims

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Application Information

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IPC IPC(8): F01N1/00F01N1/10F01N13/00
Inventor 唐汉林
Owner CHONGQING ZHANRUI AUTOMOBILE FITTING FACTORY
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