Sound insulation structure, sound insulation material and silencing device for automobile

A sound insulation material and sound insulation technology, applied in the superstructure, superstructure sub-assemblies, vehicle parts, etc., can solve the problems of infrasound wave having no effect and human body damage, etc., achieve good heat insulation ability, reduce noise to people hazard, the effect of improving mechanical strength

Inactive Publication Date: 2010-02-24
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the noise component also includes infrasound waves that are most harmful to the human body, which cannot be felt by human hearing. The current noise prevention technology has no effect on infrasound waves, and an effective solution is urgently needed

Method used

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  • Sound insulation structure, sound insulation material and silencing device for automobile
  • Sound insulation structure, sound insulation material and silencing device for automobile

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Embodiment 1

[0017] The intake and exhaust mufflers are used to reduce aerodynamic noise, but this process will inevitably produce airflow friction noise and radiation noise, especially the muffler shell with large area and low rigidity will generate a lot of radiation noise . At present, most of the shells of automobile mufflers have only one layer, or two layers close together, with some sound-absorbing materials sandwiched in between, which has obvious defects in isolating radiated noise. The invention provides a method for isolating radiation noise by vacuum, and the casing of the intake and exhaust muffler is designed as double layers, such as figure 1 As shown, the muffler device consists of an inner shell 2 and an outer shell 4. A certain gap is left in the middle, and then the interlayer is evacuated. Some supporting plates 3 are added at appropriate places, and the inner casing 2, the outer casing 4 are all sealed and connected with the air inlet pipe 1 and the air outlet pipe 5....

Embodiment 2

[0020] At present, automobiles adopt porous sound-absorbing materials arranged on the hood or other body parts to isolate engine radiation noise and wind noise. Acoustic effects are weak. Aiming at this defect, the present invention provides a vacuum sound insulation material, which uses phenolic plastic or other organic materials to produce a sound insulation material, and the sound insulation material adopts the structure of a small vacuum chamber 6 plus a soft plastic 7, and the middle is The flat small vacuum chambers 6 are arranged in an orderly manner according to certain rules, and the two sides are softer soft plastics 7 attached to it for protection. The production of this sound insulation material can choose phenolic plastics, which have the characteristics of high mechanical strength, hard wear resistance, heat resistance and flame retardancy, and other organic materials with similar characteristics can also be used. The vacuum layer of this sound insulation materi...

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Abstract

The invention discloses an inlet and exhaust silencing device, comprising an inner shell and an outer shell, wherein a certain gap is reserved between the two shells and is vacuumed to insulate the radiation noise of the shells of the silencing device. The sound insulation material uses bakelite or other organic materials to form a plurality of vacuum chambers sequentially arranged according to acertain rule, and soft plastics are attached to both sides of the vacuum chambers to perform a protecting function. The silencing device and the sound insulation material can effectively insulate a noise source, enhance the noise elimination performance of an automobile, eliminate the harm of noise to people and enhance the riding comport of the automobile by the characteristic that sound cannot be transmitted in vacuum.

Description

technical field [0001] The invention belongs to the field of automobile applications, and in particular relates to a sound insulation structure for various noise sources of automobiles, a sound insulation material and a noise reduction device for automobiles. Background technique [0002] At present, with the improvement of environmental protection awareness, more and more attention is paid to the harm of noise to people. As the main noise source in life, the noise generated by automobiles is very harmful. Therefore, the regulations have higher and higher requirements for automobile noise. To improve passenger comfort, noise isolation is also very necessary. [0003] The noise sources generated when the car is running mainly include the following aspects. The noise sources of the car include the noise of the intake system, the exhaust system and the radiation noise of the engine. The friction noise between the tire and the road surface, the car body and the air will also be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D25/08B60R13/08
Inventor 刘法永黄世国
Owner CHERY AUTOMOBILE CO LTD
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