CN204716332U - Impedance composite muffler - Google Patents

Impedance composite muffler Download PDF

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Publication number
CN204716332U
CN204716332U CN201520211236.XU CN201520211236U CN204716332U CN 204716332 U CN204716332 U CN 204716332U CN 201520211236 U CN201520211236 U CN 201520211236U CN 204716332 U CN204716332 U CN 204716332U
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CN
China
Prior art keywords
tube
communicated
noise
cavity
resistive
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.)
Expired - Fee Related
Application number
CN201520211236.XU
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Chinese (zh)
Inventor
王涛
吴熙平
张启智
湛浦军
韩强
柳仲达
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Tongzhou Dila Auto Accessories Co Ltd
Original Assignee
Beijing Tongzhou Dila Auto Accessories Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Tongzhou Dila Auto Accessories Co Ltd filed Critical Beijing Tongzhou Dila Auto Accessories Co Ltd
Priority to CN201520211236.XU priority Critical patent/CN204716332U/en
Application granted granted Critical
Publication of CN204716332U publication Critical patent/CN204716332U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of impedance composite muffler, comprise the housing with inlet hole and air outlet hole, housing is built-in with supplying tube and output tube; Supplying tube one end is communicated to inlet hole, and the other end is communicated to expansion chamber, and expansion chamber is communicated to resonant cavity by resonantron, and is communicated with air outlet hole by output tube; The tube wall of supplying tube is provided with the first resistive noise-reducing structure and resonance noise-reducing structure; The tube wall of output tube is provided with the second resistive noise-reducing structure.Waste gas of the present utility model preliminarily eliminates high, intermediate frequency noise after the first resistive noise-reducing structure by being positioned on supplying tube and the noise-reducing structure that resonates; Waste gas is after entering expansion chamber, and noise is relevant to be eliminated; Eliminate the noise of selected frequency according to resonantron caliber and pipe range by the mode of noise reduction of resonating simultaneously; High frequency noise is eliminated finally by the resistive noise-reducing structure of second on supplying tube.

Description

Impedance composite muffler
Technical field
The utility model relates to a kind of auto-parts technical field, and more particularly, it relates to a kind of impedance composite muffler.
Background technique
Silencing apparatus is as the critical component reducing automobile engine to exhaust noise, and it carrys out stress release treatment by reducing, decaying exhaust gas pulses pressure.
Silencing apparatus can be divided into front hush tube and rear hush tube; Usually in having started, front hush pipe and rear hush pipe are used in combination.
Disclose a kind of existing rear hush pipe structure in FIG, it comprises the supplying tube 01 be placed in shell, and supplying tube 01 one end is communicated with outside, and the other end is successively by exporting outside to after U-tube 02 and output tube 03; Between shell and aforesaid all pipelines, be filled with acoustical cotton, U-tube 02 and output tube 03 offer aperture group and is used for and silencing cotton cooperation formation impedance composite baffler, its erasure effect is not fine.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of acoustical absorptivity can effectively carried in high and low, intermediate frequency range, there is better frequency noise elimination selectivity, be applicable to the impedance composite muffler improving exhaust order silencing noise ability.
For achieving the above object, the utility model provides following technological scheme:
A kind of impedance composite muffler, comprise the housing with inlet hole and air outlet hole, described housing is built-in with supplying tube and output tube;
Described supplying tube one end is communicated to described inlet hole, and the other end is communicated to expansion chamber, and described expansion chamber is communicated to resonant cavity by resonantron, and is communicated with air outlet hole by output tube;
The tube wall of described supplying tube is provided with the first resistive noise-reducing structure and resonance noise-reducing structure;
The tube wall of described output tube is provided with the second resistive noise-reducing structure.
Preferably, described supplying tube comprises preposition pipe and suction tude;
One end of described preposition pipe is communicated to inlet hole, the other end is closed, the tube wall of described preposition pipe offers preposition hole group, and the internal duct of described preposition pipe is communicated to the first resistive cavity being positioned at enclosure interior by preposition hole group, is filled with silencing cotton in described first resistive cavity;
Described preposition hole group, the first resistive cavity and be positioned at the first resistive cavity silencing cotton form described in the first resistive noise-reducing structure;
The sidewall of the described preposition pipe of one end connection of described suction tude, the other end is communicated to expansion chamber, and the tube wall of described suction tude is provided with resonance noise-reducing structure.
Preferably, offer inlet hole group at the tube wall of described suction tude, the internal duct of described suction tude is communicated to the second resonating cativty being positioned at housing by inlet hole group;
Resonance noise-reducing structure described in described inlet hole group, the second resonating cativty are formed.
Preferably, described expansion chamber comprises by the first expansion chamber of expansion chamber baffle for separating and the second expansion chamber, and described expansion chamber dividing plate offers multiple through hole;
Described supplying tube is communicated to the first expansion chamber, and described first expansion chamber is communicated to the inside of resonant cavity by resonantron,
Described second expansion chamber is communicated to air outlet hole by output tube.
Preferably, the tube wall of described output tube offers delivery outlet group, the internal duct of described output tube is communicated to the 3rd resistive cavity being positioned at housing by delivery outlet group, is filled with silencing cotton in described 3rd resistive cavity;
Described delivery outlet group, the 3rd cavity and the silencing cotton being positioned at the 3rd resistive cavity form the second resistive noise-reducing structure.
Compared with prior art, waste gas of the present utility model preliminarily eliminates high, intermediate frequency noise after the first resistive noise-reducing structure by being positioned on supplying tube and the noise-reducing structure that resonates; Waste gas is after entering expansion chamber, and noise is relevant to be eliminated; Eliminate the noise of selected frequency according to resonantron caliber and pipe range by the mode of noise reduction of resonating simultaneously; High frequency noise is eliminated finally by the resistive noise-reducing structure of second on supplying tube.
Accompanying drawing explanation
Fig. 1 is prior art;
Fig. 2 is the cut-away view of the utility model impedance composite muffler embodiment.
Accompanying drawing marks: 1, the first cavity; 2, the second cavity; 3, the 3rd cavity; 4, the 4th cavity; 5, preposition pipe; 51, preposition hole group; 6, suction tude; 61, inlet hole group; 62, air inlet dividing plate; 63, the second resonating cativty; 7, output tube; 71, delivery outlet group; 72, dividing plate is exported.
Embodiment
With reference to Fig. 2, the utility model impedance composite muffler embodiment is described further.
The concrete structure of a kind of impedance composite muffler that what the present embodiment was exemplary disclose, its
Comprise housing, become the first cavity 1, second cavity 2, the 3rd cavity 3 and the 4th cavity 4 in enclosure interior by three pieces of baffle for separatings;
First cavity 1 offers inlet hole and air outlet hole, and preposition pipe 5 one end being simultaneously positioned at the first cavity 1 is communicated to inlet hole, and the other end blocks, and offers preposition hole group 51 on its sidewall simultaneously; So, the noise entered by inlet hole just can enter in the first cavity 1 by preposition hole group 51, and in the first cavity 1, be filled with silencing cotton, then noise is after entering the first resistive cavity be made up of the first cavity 1 and silencing cotton, repeatedly can vibrate in the gap of silencing cotton, produce with acoustical cotton and rub, convert acoustic energy to heat energy consumption.
One end of this enforcement suction tude 6 is communicated with on the sidewall of preposition pipe 5 through dividing plate, and the other end is by being communicated with in the 3rd cavity 3 through the second cavity 2; Side by side, the sidewall of suction tude 6 offers inlet hole group 61, the outer side wall of suction tude 6 and air inlet dividing plate 62 form the second resonating cativty 63 sealed; So, the noise entering suction tude 6 by entering to the second resonating cativty 63 after inlet hole group 61, in the second resonating cativty 63 internal resonance noise reduction.
Wherein, the resonant silencing frequency of the second resonating cativty 63 is determined by the cavity volume of the aperture of its inlet hole group 61, hole count and the second resonating cativty 63, improves the noise reduction scope that the present embodiment is specifically suitable for.
Waste gas is after entering to the 3rd cavity 3 by suction tude 6, on the one hand by stretching to the resonantron in the second cavity 2, resonance noise reduction is carried out by being directed in the second cavity 2 with noise in the 3rd cavity 3,3rd cavity 3 is communicated to the 4th cavity 4 on the other hand, 3rd cavity 3 and the 4th cavity 4 constitute expansion chamber in fact, and waste gas is through the 3rd cavity 3 and the 4th cavity 4
After enter in output tube 7, reach the effect of expansion noise reduction.
Wherein, the frequency of carrying out resonant silencing in the second cavity 2 is determined by resonantron caliber and pipe range.
In addition, be communicated with by aperture between the 3rd cavity 3 of the present embodiment and the 4th cavity 4, to improve the frequency of remaining noise, to strengthen the effect of follow-up resistive noise reduction.
Moreover, the present embodiment preferably offers delivery outlet group 71 on output tube 7, the outer wall of output tube 7 is formed the 3rd resistive cavity of sealing by exporting dividing plate 72, the internal duct of output tube 7 is communicated to the 3rd resistive cavity by delivery outlet group 71, is filled with silencing cotton in the 3rd resistive cavity simultaneously; So, the noise of medium, high frequency enters to the 3rd resistive cavity by input hole group, rubs to convert acoustic energy to heat energy and exhaust in the gap of the silencing cotton of the 3rd resistive cavity, reaches the object removing medium, high frequency noise.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (5)

1. an impedance composite muffler, is characterized in that, comprises the housing with inlet hole and air outlet hole, and described housing is built-in with supplying tube and output tube;
Described supplying tube one end is communicated to described inlet hole, and the other end is communicated to expansion chamber, and described expansion chamber is communicated to resonant cavity by resonantron, and is communicated with air outlet hole by output tube;
The tube wall of described supplying tube is provided with the first resistive noise-reducing structure and resonance noise-reducing structure;
The tube wall of described output tube is provided with the second resistive noise-reducing structure.
2. impedance composite muffler according to claim 1, is characterized in that, described supplying tube comprises preposition pipe and suction tude;
One end of described preposition pipe is communicated to inlet hole, the other end is closed, the tube wall of described preposition pipe offers preposition hole group, and the internal duct of described preposition pipe is communicated to the first resistive cavity being positioned at enclosure interior by preposition hole group, is filled with silencing cotton in described first resistive cavity;
Described preposition hole group, the first resistive cavity and be positioned at the first resistive cavity silencing cotton form described in the first resistive noise-reducing structure;
The sidewall of the described preposition pipe of one end connection of described suction tude, the other end is communicated to expansion chamber, and the tube wall of described suction tude is provided with resonance noise-reducing structure.
3. impedance composite muffler according to claim 2, it is characterized in that, offer inlet hole group at the tube wall of described suction tude, the internal duct of described suction tude is communicated to the second resonating cativty being positioned at housing by inlet hole group;
Resonance noise-reducing structure described in described inlet hole group, the second resonating cativty are formed.
4. impedance composite muffler according to claim 1, it is characterized in that, described expansion chamber comprises by the first expansion chamber of expansion chamber baffle for separating and the second expansion chamber, and described expansion chamber dividing plate offers multiple through hole;
Described supplying tube is communicated to the first expansion chamber, and described first expansion chamber is communicated to the inside of resonant cavity by resonantron,
Described second expansion chamber is communicated to air outlet hole by output tube.
5. impedance composite muffler according to claim 1, it is characterized in that, the tube wall of described output tube offers delivery outlet group, the internal duct of described output tube is communicated to the 3rd resistive cavity being positioned at housing by delivery outlet group, is filled with silencing cotton in described 3rd resistive cavity;
Described delivery outlet group, the 3rd cavity and the silencing cotton being positioned at the 3rd resistive cavity form the second resistive noise-reducing structure.
CN201520211236.XU 2015-04-09 2015-04-09 Impedance composite muffler Expired - Fee Related CN204716332U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520211236.XU CN204716332U (en) 2015-04-09 2015-04-09 Impedance composite muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520211236.XU CN204716332U (en) 2015-04-09 2015-04-09 Impedance composite muffler

Publications (1)

Publication Number Publication Date
CN204716332U true CN204716332U (en) 2015-10-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520211236.XU Expired - Fee Related CN204716332U (en) 2015-04-09 2015-04-09 Impedance composite muffler

Country Status (1)

Country Link
CN (1) CN204716332U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105888775A (en) * 2016-05-31 2016-08-24 清华大学苏州汽车研究院(相城) Automobile exhausting silencer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105888775A (en) * 2016-05-31 2016-08-24 清华大学苏州汽车研究院(相城) Automobile exhausting silencer

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151021

Termination date: 20170409