CN108843434A - A kind of automobile exhaust pipe sound-deadening and noise-reducing device - Google Patents
A kind of automobile exhaust pipe sound-deadening and noise-reducing device Download PDFInfo
- Publication number
- CN108843434A CN108843434A CN201810583782.4A CN201810583782A CN108843434A CN 108843434 A CN108843434 A CN 108843434A CN 201810583782 A CN201810583782 A CN 201810583782A CN 108843434 A CN108843434 A CN 108843434A
- Authority
- CN
- China
- Prior art keywords
- sound
- noise
- exhaust pipe
- abatvoix
- deadening
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- 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
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0857—Carbon oxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Silencers (AREA)
Abstract
The present invention relates to a kind of automobile exhaust pipe sound-deadening and noise-reducing devices, belong to automobile exhaust pipe technical field, a kind of automobile exhaust pipe sound-deadening and noise-reducing device, including air inlet pipe, noise reduction ontology and exhaust pipe, the noise reduction ontology includes shell and inner casing, vacuum chamber is equipped between the shell and inner casing, the inner housing inner is equipped with the first split channel and the second split channel, and first split channel and the second split channel are equipped with the first acoustical cotton.The present invention absorbs the carbon dioxide of noise gas by absorption unit of dioxide carbon, and it is filtered by filter screen, sound wave is absorbed by setting split channel, current divider, abatvoix and sound-absorbing pipe, sound-absorbing effect is good, sound-absorbing is high-efficient, it is convenient to clean replacement strainer, is fixed convenient for the installation of silencing means.
Description
Technical field
The present invention relates to automobile exhaust pipe technical field, specifically a kind of automobile exhaust pipe sound-deadening and noise-reducing device.
Background technique
As China's economic development automobile is more more and more universal, people to the riding comfort of vehicle propose it is higher,
The requirement of update, noise have become the important indicator in riding comfort, but the engine of most of automobile is interior at present
Combustion engine, when internal combustion engine, can generate a large amount of noises.The inner wall of traditional automobile exhaust pipe is smooth linear type chamber, is passed through
Silencing cotton is set on inner wall and carrys out noise reduction, but the noise reduction effect of this structure is not very ideal.
Summary of the invention
The purpose of the present invention is to provide a kind of automobile exhaust pipe sound-deadening and noise-reducing devices, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the present invention provides the following technical solutions：
A kind of automobile exhaust pipe sound-deadening and noise-reducing device, including air inlet pipe, noise reduction ontology and exhaust pipe, the noise reduction body exterior are set
There is clip, the clip is equipped with mounting hole, is convenient for for noise reduction ontology being fixed on automobile by clip and mounting hole, described
It is equipped with gasket on the right side of noise reduction ontology, fixed plate is equipped on the right side of gasket, is equipped with bolt in the fixed plate and gasket, institute
The air inlet pipe for being equipped with and being firmly connected with it on the right side of fixed plate is stated, absorption unit of dioxide carbon is equipped with inside the air inlet pipe, passes through spiral shell
Air inlet pipe is connect by bolt with noise reduction ontology, and gasket ensure that the leakproofness of noise reduction ontology, prevents sound wave and gas leakage, described
Exhaust pipe is installed, noise gas enters from air inlet pipe, and carbon dioxide therein is by absorption unit of dioxide carbon on the left of noise reduction ontology
Absorb, sound wave is discharged after the processing of noise reduction ontology from exhaust pipe, and the noise reduction ontology includes shell and inner casing, the shell and
It is equipped with vacuum chamber between inner casing, the possibility that sound wave is spread out of from shell is reduced by vacuum chamber, to reduce noise, in the inner casing
Equipped with the first split channel and the second split channel, first split channel and the second split channel are equipped with the first sound-absorbing
Cotton increases the absorption area of the first acoustical cotton absorption, the sound wave after absorption by the first split channel and the second split channel
Interference is generated in meet, reduces noise, is equipped with the first abatvoix, first abatvoix bottom on the left of first split channel
Portion is equipped with current divider, is equipped with inside the current divider and shunts through-hole, and noise is easier to be absorbed by abatvoix after shunting, and described the
It is equipped with the second abatvoix on the left of one abatvoix, is equipped with sound-absorbing pipe on the left of second abatvoix, the sound-absorbing inside pipe wall is equipped with the
Two acoustical cottons.
As further technical solution of the present invention：Be equipped with circular filter screen among the gasket, the strainer outer diameter with
Air inlet bore is identical, and it is external that the impurity that may contain in gas is blocked in noise reduction sheet by strainer, and impurity effect is avoided to disappear
Audio fruit.
As further technical solution of the invention：The first acoustical cotton shape is hemispherical, increases sound-absorbing face
Product, improves sound-absorbing effect.
As further technical solution of the invention：First abatvoix and the second abatvoix are foamed aluminium sound-absorbing
Plate, sound-absorbing effect are good.
As further technical solution of the invention：The sound-absorbing pipe is helical form suction tube, passes through helical form sound-absorbing
Pipe increases sound-absorbing path and sound-absorbing area, keeps wave absorption more thorough, further promotes sound-absorbing effect.
Compared with prior art, the beneficial effects of the invention are as follows：The two of noise gas are absorbed by absorption unit of dioxide carbon
Carbonoxide, and be filtered by filter screen, sound wave is inhaled by setting split channel, current divider, abatvoix and sound-absorbing pipe
It receives, sound-absorbing effect is good, and sound-absorbing is high-efficient, is convenient to clean replacement strainer, fixes convenient for the installation of silencing means.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of automobile exhaust pipe sound-deadening and noise-reducing device；
Fig. 2 is the main view sectional view of automobile exhaust pipe sound-deadening and noise-reducing device；
Fig. 3 is the structural schematic diagram of gasket in automobile exhaust pipe sound-deadening and noise-reducing device.
In figure：1- air inlet pipe, 2- noise reduction ontology, 3- exhaust pipe, 4- clip, 5- mounting hole, 6- gasket, 7- fixed plate,
8- bolt, 9- absorption unit of dioxide carbon, 10- shell, 11- inner casing, 12- vacuum chamber, the first split channel of 13-, 14- second are shunted
Channel, the first acoustical cotton of 15-, 16- current divider, 17- shunt through-hole, the first abatvoix of 18-, the second abatvoix of 19-, 20- sound-absorbing
Pipe, the second acoustical cotton of 21-, 22- strainer.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
Automobile exhaust pipe sound-deadening and noise-reducing device as shown in Figure 1, 2, 3, including air inlet pipe 1, noise reduction ontology 2 and exhaust pipe 3,
Clip 4 is equipped with outside the noise reduction ontology 2, the clip 4 is equipped with mounting hole 5, is convenient for by clip 4 and mounting hole 5 by noise reduction
Ontology 2 is fixed on automobile, and gasket 6 is equipped on the right side of the noise reduction ontology 2, is equipped with fixed plate 7, institute on the right side of gasket 6
It states and is equipped with bolt 8 in fixed plate 7 and gasket 6, the air inlet pipe 1 being firmly connected with it, institute are equipped on the right side of the fixed plate 7
It states and is equipped with absorption unit of dioxide carbon 9 inside air inlet pipe 1, connect air inlet pipe 1 with noise reduction ontology 2 by bolt 8, gasket 8 is protected
The leakproofness for having demonstrate,proved noise reduction ontology 2 prevents sound wave and gas leakage, is equipped with exhaust pipe 3, noise on the left of the noise reduction ontology 2
Gas enters from air inlet pipe 1, and carbon dioxide therein is absorbed by absorption unit of dioxide carbon 9, and sound wave is after the processing of noise reduction ontology 2
It is discharged from exhaust pipe 3, the noise reduction ontology 2 includes shell 10 and inner casing 11, and vacuum is equipped between the shell 10 and inner casing 11
Chamber 12 reduces the possibility that sound wave is spread out of from shell by vacuum chamber 12, to reduce noise, is equipped with first point in the inner casing 11
Circulation road 13 and the second split channel 14, first split channel 13 and the second split channel 14 are equipped with the first acoustical cotton
15, the absorption area of the first acoustical cotton 15 absorption is increased by the first split channel 13 and the second split channel 14, after absorption
Sound wave generate interference in meet, reduce noise, be equipped with the first abatvoix 18 on the left of first split channel 13, described the
One abatvoix, 18 bottom is equipped with current divider 16, is equipped with inside the current divider 16 and shunts through-hole 17, noise is easier after shunting
It is absorbed by abatvoix, the second abatvoix 19 is equipped on the left of first abatvoix 18, is equipped with and inhales on the left of second abatvoix 19
Sound tube 20,20 inner wall of sound-absorbing pipe are equipped with the second acoustical cotton 21.
Circular filter screen 22 is equipped among the gasket 6,22 outer diameter of strainer is identical as 1 internal diameter of air inlet pipe, passes through filter
The impurity that may contain in gas is blocked in outside noise reduction ontology 2 by net 22, avoids impurity effect erasure effect.
First acoustical cotton, 15 shape is hemispherical, increases sound-absorbing area, improves sound-absorbing effect.
First abatvoix 18 and the second abatvoix 19 are foamed aluminium abatvoix, and sound-absorbing effect is good.
The sound-absorbing pipe 20 is helical form suction tube, increases sound-absorbing path and sound-absorbing face by helical form sound-absorbing pipe 20
Product, keeps wave absorption more thorough, further promotes sound-absorbing effect.
Working principle is as follows：Noise gas enters from air inlet pipe 1, and absorption unit of dioxide carbon 9 absorbs carbon dioxide therein,
Noise gas enters noise reduction ontology 2 after passing through filter screen 22, and successively passes through split channel, current divider 16, abatvoix and sound-absorbing
Pipe absorbs most of noise under the action of acoustical cotton and foamed aluminium abatvoix, and last gas is discharged from exhaust pipe 3, passes through spiral shell
Bolt 8 is convenient to clean replacement strainer, clip 4 and mounting hole 5 convenient for noise reduction ontology 2 to be fixed on automobile.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of automobile exhaust pipe sound-deadening and noise-reducing device, it is characterised in that：Including air inlet pipe（1）, noise reduction ontology（2）And exhaust pipe
（3）, the noise reduction ontology（2）Outside is equipped with clip（4）, the clip（4）Equipped with mounting hole（5）, the noise reduction ontology（2）It is right
Side is equipped with gasket（6）, gasket（6）Right side is equipped with fixed plate（7）, the fixed plate（7）And gasket（6）Inside it is equipped with spiral shell
Bolt（8）, the fixed plate（7）Right side is equipped with the air inlet pipe being firmly connected with it（1）, the air inlet pipe（1）Inside is equipped with dioxy
Change carbon absorption device（9）, the noise reduction ontology（2）Left side is equipped with exhaust pipe（3）, the noise reduction ontology（2）Including shell（10）
And inner casing（11）, the shell（10）And inner casing（11）Between be equipped with vacuum chamber（12）, the inner casing（11）Inside it is equipped with first point
Circulation road（13）With the second split channel（14）, first split channel（13）With the second split channel（14）It is equipped with first
Acoustical cotton（15）, first split channel（13）Left side is equipped with the first abatvoix（18）, first abatvoix（18）Bottom
Equipped with current divider（16）, the current divider（16）Inside, which is equipped with, shunts through-hole（17）, first abatvoix（18）Left side is equipped with
Second abatvoix（19）, second abatvoix（19）Left side is equipped with sound-absorbing pipe（20）, the sound-absorbing pipe（20）Inner wall is equipped with the
Two acoustical cottons（21）.
2. automobile exhaust pipe sound-deadening and noise-reducing device according to claim 1, it is characterised in that：The gasket（6）It is intermediate
Equipped with circular filter screen（22）, the strainer（22）Outer diameter and air inlet pipe（1）Internal diameter is identical.
3. automobile exhaust pipe sound-deadening and noise-reducing device according to claim 1, it is characterised in that：First acoustical cotton（15）
Shape is hemispherical.
4. automobile exhaust pipe sound-deadening and noise-reducing device according to claim 1, it is characterised in that：First abatvoix（18）
With the second abatvoix（19）It is foamed aluminium abatvoix.
5. automobile exhaust pipe sound-deadening and noise-reducing device according to claim 1, it is characterised in that：The sound-absorbing pipe（20）For spiral shell
Revolve shape suction tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583782.4A CN108843434A (en) | 2018-06-08 | 2018-06-08 | A kind of automobile exhaust pipe sound-deadening and noise-reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583782.4A CN108843434A (en) | 2018-06-08 | 2018-06-08 | A kind of automobile exhaust pipe sound-deadening and noise-reducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108843434A true CN108843434A (en) | 2018-11-20 |
Family
ID=64211595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810583782.4A Pending CN108843434A (en) | 2018-06-08 | 2018-06-08 | A kind of automobile exhaust pipe sound-deadening and noise-reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843434A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447602A (en) * | 2017-09-19 | 2017-12-08 | 华东交通大学 | A kind of train wheel and the vacuum cavity type reducing noise for combined system on rail |
| CN112525322A (en) * | 2020-11-18 | 2021-03-19 | 上海申狮物联网科技有限公司 | Intelligent digital regulator |
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| CN101654120A (en) * | 2009-09-08 | 2010-02-24 | 奇瑞汽车股份有限公司 | Sound insulation structure, sound insulation material and silencing device for automobile |
| CN201535187U (en) * | 2009-11-13 | 2010-07-28 | 无锡世一电力机械设备有限公司 | Multi-layered composite exhaust muffler |
| CN102322314A (en) * | 2011-06-27 | 2012-01-18 | 胡洪霞 | Spiral baffler |
| CN105909343A (en) * | 2016-06-02 | 2016-08-31 | 韩群山 | Muffler of journey-increased type electric hybrid automobile |
| CN205638652U (en) * | 2016-06-01 | 2016-10-12 | 哈尔滨艾瑞汽车排气系统有限公司 | Novel bilayer structure exhaust system device |
| CN107630749A (en) * | 2017-10-26 | 2018-01-26 | 江苏东方康弛机电科技有限公司 | A kind of sound attenuated enclosure of diesel generation sets |
| CN108005754A (en) * | 2016-10-28 | 2018-05-08 | 天津烽珊源科技有限公司 | A kind of automobile using sound-deadening and noise-reducing device |
| CN207377636U (en) * | 2017-11-10 | 2018-05-18 | 镇江博泽汽车零部件有限公司 | A kind of high-efficiency environment friendly automotive muffler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2668862Y (en) * | 2003-09-10 | 2005-01-05 | 马恩强 | Corrugated pipe shock-avoiding impedance composite silencer |
| CN101654120A (en) * | 2009-09-08 | 2010-02-24 | 奇瑞汽车股份有限公司 | Sound insulation structure, sound insulation material and silencing device for automobile |
| CN201535187U (en) * | 2009-11-13 | 2010-07-28 | 无锡世一电力机械设备有限公司 | Multi-layered composite exhaust muffler |
| CN102322314A (en) * | 2011-06-27 | 2012-01-18 | 胡洪霞 | Spiral baffler |
| CN205638652U (en) * | 2016-06-01 | 2016-10-12 | 哈尔滨艾瑞汽车排气系统有限公司 | Novel bilayer structure exhaust system device |
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| CN108005754A (en) * | 2016-10-28 | 2018-05-08 | 天津烽珊源科技有限公司 | A kind of automobile using sound-deadening and noise-reducing device |
| CN107630749A (en) * | 2017-10-26 | 2018-01-26 | 江苏东方康弛机电科技有限公司 | A kind of sound attenuated enclosure of diesel generation sets |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447602A (en) * | 2017-09-19 | 2017-12-08 | 华东交通大学 | A kind of train wheel and the vacuum cavity type reducing noise for combined system on rail |
| CN112525322A (en) * | 2020-11-18 | 2021-03-19 | 上海申狮物联网科技有限公司 | Intelligent digital regulator |
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Application publication date: 20181120 |
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