CN109505680A - A kind of mobile muffler sound absorption composite layer - Google Patents
A kind of mobile muffler sound absorption composite layer Download PDFInfo
- Publication number
- CN109505680A CN109505680A CN201811305955.2A CN201811305955A CN109505680A CN 109505680 A CN109505680 A CN 109505680A CN 201811305955 A CN201811305955 A CN 201811305955A CN 109505680 A CN109505680 A CN 109505680A
- Authority
- CN
- China
- Prior art keywords
- composite layer
- sound absorption
- polymer composite
- polyimides
- methylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Exhaust Silencers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of mobile muffler sound absorption composite layers, are 6:1 including the porous plate layer being bonded together and polymer composite layer and porous plate layer and the thickness of polymer composite layer ratio；Porous plate layer uses stainless steel material；Polymer composite layer is by polyimides, 2, it is prepared by 2- methylene-bis- (4- methyl-6-tert-butylphenol) and polyester fiber, wherein polyimides, which accounts for 50~70%, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and accounts for 20~30%, polyester fiber, accounts for 10~20%.This mobile muffler can effectively absorb energy in vibration with sound absorption composite layer, and porous material sound absorbing mechanisms collaboration different from two kinds of resonance of film can be made full use of to widen sound absorption frequency domain with the increase of structure level number, especially suitable for mobile muffler.
Description
Technical field
The present invention relates to a kind of sound absorption composite layer, specifically a kind of sound absorption being suitably mounted in mobile muffler is compound
Layer, belongs to field of automobile.
Background technique
Mobile muffler, is mainly used for the noise generated when reducing the engine operation of motor vehicle, and principle is automobile row
Tracheae is made of two different pipelines of length, the two pipelines first separate to cross again, due to the length difference of the two pipelines
Value is equal to the half of the wavelength for the sound wave that automobile is issued, and cancels out each other and weakens so that two column sound waves are interfered in superposition
The sound intensity reduces the sound for being transmitted through, to play the effect of noise reduction.
Automotive muffler can be divided into reactive muffler, dissipative muffler and impedance composite by noise-cancelling theory and structure and eliminate the noise
Device three classes.Wherein dissipative muffler mainly reduces noise using sound-absorbing porous material, and sound-absorbing material is fixed on air-flow
It is arranged in the duct on the inner wall in channel or according to certain way, just constitutes dissipative muffler, sound wave is by passing through the hole of material
After gap, cause the vibration of the air and material in hole, by friction and viscous resistance, sound can be converted to thermal energy and inhaled
It receives, it is general that only there is good sound absorbing performance in high band, in order to obtain preferable sound absorbing performance, material warp in middle low frequency
It often needs to be made very thick；Dissipative muffler is to complete energy conversion using resonance mode and achieve the purpose that sound absorption, Chang Te
Frequency band is determined with preferable sound absorbing performance, and the sound absorbing performance far from this frequency band is poor.
In practical engineering applications, under the premise of how there is comparable mechanical property while material is more frivolous
Good sound absorbing performance is obtained, is the problem for perplexing insider.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of mobile muffler sound absorption composite layer, can effectively be inhaled in vibration
Energy is received, and porous material sound absorbing mechanisms collaboration different from two kinds of resonance of film can be made full use of to open up with the increase of structure level number
Wide sound absorption frequency domain, especially suitable for mobile muffler.
To achieve the above object, this mobile muffler sound absorption composite layer includes the porous plate layer and high score being bonded together
Sub- composite layer and porous plate layer and the thickness of polymer composite layer ratio are 6:1；Porous plate layer uses stainless steel
Matter；Polymer composite layer is by polyimides, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and polyester fibres
Standby to form, wherein polyimides accounts for 50~70%, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and accounts for 20~30%, washs
Synthetic fibre fiber accounts for 10~20%.
As one embodiment of the present invention, polyester fiber is seven-hole hollow polyester fiber.
As one embodiment of the present invention, polymer composite layer is by 50% polyimides, the 2,2- of 30%
It is prepared by methylene-bis- (4- methyl-6-tert-butylphenols) and 20% seven-hole hollow polyester fiber.
As another embodiment of the invention, polymer composite layer by 55% polyimides, the 2 of 35%,
It is prepared by 2- methylene-bis- (4- methyl-6-tert-butylphenol) and 10% seven-hole hollow polyester fiber.
As another embodiment of the invention, polymer composite layer by 70% polyimides, the 2 of 20%,
It is prepared by 2- methylene-bis- (4- methyl-6-tert-butylphenol) and 10% seven-hole hollow polyester fiber.
Compared with prior art, this mobile muffler works as porous plate with sound absorption composite layer due to including porous plate layer
Porous plate layer and polymer composite layer may make up the sound absorption effect of porous material when layer is located at muffler la m；Due to more
Orifice layer and the thickness of polymer composite layer ratio are 6:1, i.e., polymer composite layer is membrane structure, therefore works as high score
The sound absorption effect of film resonance is presented in polymer composite layer when sub- composite layer is located at muffler la m；Due to including
Polymer composite layer comprising polyimides, therefore polymer composite layer has high temperature resistant, fire-retardant characteristic；This vapour
Vehicle muffler absorb sound composite layer can effective absorption sound energy, with the increase of structure level number, can make full use of porous material with it is thin
Sound absorption frequency domain is widened in two kinds of membrane resonance different sound absorption machine collaborations, especially suitable for mobile muffler.
Specific embodiment
This mobile muffler sound absorption composite layer include the porous plate layer being bonded together and polymer composite layer and
Porous plate layer and the thickness of polymer composite layer ratio are 6:1；Porous plate layer uses stainless steel material；Polymer composite
Layer is prepared by polyimides, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and polyester fiber, and wherein polyamides is sub-
Amine, which accounts for 50~70%, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and accounts for 20~30%, polyester fiber, accounts for 10~20%,
Wherein polyester fiber is seven-hole hollow polyester fiber.
Embodiment 1: polymer composite layer is by 50% polyimides, bis- (the 4- methyl-of 30% 2,2- methylene-
6- tert-butyl phenol) and 20% seven-hole hollow polyester fiber prepare.
Embodiment 2: polymer composite layer is by 55% polyimides, bis- (the 4- methyl-of 35% 2,2- methylene-
6- tert-butyl phenol) and 10% seven-hole hollow polyester fiber prepare.
Embodiment 3: polymer composite layer is by 70% polyimides, bis- (the 4- methyl-of 20% 2,2- methylene-
6- tert-butyl phenol) and 10% seven-hole hollow polyester fiber prepare.
Claims (5)
1. a kind of mobile muffler sound absorption composite layer, which is characterized in that including the porous plate layer being bonded together and macromolecule
Composite layer and porous plate layer and the thickness of polymer composite layer ratio are 6:1；Porous plate layer uses stainless steel material；
Polymer composite layer by polyimides, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and polyester fiber prepare and
At wherein polyimides accounts for 50~70%, 2,2- methylene-bis- (4- methyl-6-tert-butylphenol) and accounts for 20~30%, terylene fibre
Dimension accounts for 10~20%.
2. mobile muffler according to claim 1 sound absorption composite layer, which is characterized in that polyester fiber is seven-hole hollow
Polyester fiber.
3. mobile muffler according to claim 2 sound absorption composite layer, which is characterized in that polymer composite layer by
50% polyimides, 30% 2,2- methylene-bis- (4- methyl-6-tert-butylphenols) and 20% seven-hole hollow terylene are fine
Dimension is prepared.
4. mobile muffler according to claim 2 sound absorption composite layer, which is characterized in that polymer composite layer by
55% polyimides, 35% 2,2- methylene-bis- (4- methyl-6-tert-butylphenols) and 10% seven-hole hollow terylene are fine
Dimension is prepared.
5. mobile muffler according to claim 2 sound absorption composite layer, which is characterized in that polymer composite layer by
70% polyimides, 20% 2,2- methylene-bis- (4- methyl-6-tert-butylphenols) and 10% seven-hole hollow terylene are fine
Dimension is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305955.2A CN109505680A (en) | 2018-11-05 | 2018-11-05 | A kind of mobile muffler sound absorption composite layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305955.2A CN109505680A (en) | 2018-11-05 | 2018-11-05 | A kind of mobile muffler sound absorption composite layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109505680A true CN109505680A (en) | 2019-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811305955.2A Pending CN109505680A (en) | 2018-11-05 | 2018-11-05 | A kind of mobile muffler sound absorption composite layer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775533A (en) * | 2019-04-03 | 2020-10-16 | 上海水星家用纺织品股份有限公司 | Honeycomb type element structure sound insulation fabric and preparation method thereof |
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|---|---|---|---|---|
| CN102153933A (en) * | 2011-05-13 | 2011-08-17 | 华东理工大学 | Preparation method for vibration-damping and noise-reducing coating composition |
| CN105133336A (en) * | 2015-09-23 | 2015-12-09 | 芜湖环瑞汽车内饰件有限公司 | Abrasion-resistant and corrosion-resistant sound-absorbing cotton and preparation method thereof |
| CN106633697A (en) * | 2016-12-14 | 2017-05-10 | 天津寻冬科技有限公司 | Novel material of sound absorption sheet material and preparation method of novel material |
| CN107633838A (en) * | 2016-07-19 | 2018-01-26 | 黄礼范 | The silencer and its preparation and assembly method of acoustic metamaterial catch containing through hole |
| CN108292498A (en) * | 2015-11-27 | 2018-07-17 | 株式会社神户制钢所 | porous sound absorbing plate |
-
2018
- 2018-11-05 CN CN201811305955.2A patent/CN109505680A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153933A (en) * | 2011-05-13 | 2011-08-17 | 华东理工大学 | Preparation method for vibration-damping and noise-reducing coating composition |
| CN105133336A (en) * | 2015-09-23 | 2015-12-09 | 芜湖环瑞汽车内饰件有限公司 | Abrasion-resistant and corrosion-resistant sound-absorbing cotton and preparation method thereof |
| CN108292498A (en) * | 2015-11-27 | 2018-07-17 | 株式会社神户制钢所 | porous sound absorbing plate |
| CN107633838A (en) * | 2016-07-19 | 2018-01-26 | 黄礼范 | The silencer and its preparation and assembly method of acoustic metamaterial catch containing through hole |
| CN106633697A (en) * | 2016-12-14 | 2017-05-10 | 天津寻冬科技有限公司 | Novel material of sound absorption sheet material and preparation method of novel material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775533A (en) * | 2019-04-03 | 2020-10-16 | 上海水星家用纺织品股份有限公司 | Honeycomb type element structure sound insulation fabric and preparation method thereof |
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| PB01 | Publication | ||
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Application publication date: 20190322 |