CN206397562U - A kind of secondary silencer of automobile exhaust system - Google Patents

A kind of secondary silencer of automobile exhaust system Download PDF

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Publication number
CN206397562U
CN206397562U CN201720015374.XU CN201720015374U CN206397562U CN 206397562 U CN206397562 U CN 206397562U CN 201720015374 U CN201720015374 U CN 201720015374U CN 206397562 U CN206397562 U CN 206397562U
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CN
China
Prior art keywords
silencer
perforated pipe
resonant cavity
main
automobile exhaust
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Application number
CN201720015374.XU
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Chinese (zh)
Inventor
黎仁聪
杨庆
周雪琴
钟山
董浪平
田华川
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.)
Chongqing Changan Automobile Co Ltd
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Chongqing Changan Automobile Co Ltd
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Priority to CN201720015374.XU priority Critical patent/CN206397562U/en
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Abstract

The utility model is related to a kind of secondary silencer of automobile exhaust system, including resonant cavity and through the main perforated pipe of the resonant cavity, dividing plate is provided between main perforation pipe outer wall shakes cavity wall together, resonant cavity is divided at least two resonator chambers by the dividing plate, secondary perforated pipe is arranged with outside main perforated pipe in wherein one resonant cavity, the two ends of the secondary perforated pipe and the resonator chamber where it are affixed;The utility model is solved in the case where silencer separation series is certain, and noise reduction is widened by changing acoustic wave filter structure.

Description

A kind of secondary silencer of automobile exhaust system
Technical field
The utility model is related to automobile exhaust system;More particularly to a kind of secondary silencer of automobile exhaust system.
Background technology
Automobile exhaust noise is one of main component of automobile noise, and the quality of silencer soundproof effect directly affects vapour The NVH performances and the degree to pollution from environmental noise of car.Current automobile exhaust system is using two grades of noise countermeasures, i.e., in exhaust Major and minor two silencers are installed in system.Above-mentioned secondary silencer mainly uses mono-level resonant cavate silencer, is mainly shown as Perforation is offered on main perforated pipe, and in outside cylinder formation mono-level resonant chamber.
But, automobile exhaust noise is broadband noise, and main preceding 4 order frequency noise is up to 1000Hz.List at this stage The resonant secondary silencer noise elimination frequency band of level is narrower, it is difficult to reduce the demand of actual noise reduction completely.
In the prior art, have by the way that resonant cavity is divided into multistage come noise reduction, but in the certain situation of silencer length Under, the series that it separates is limited, therefore in the case where silencer length is certain, how to change acoustic wave filter structure to widen noise reduction Effect, into urgent problem to be solved.
The content of the invention
The purpose of this utility model is, in the case where silencer separation series is certain, by changing acoustic wave filter structure Widen noise reduction.
In order to achieve the above object, the utility model provides a kind of automobile exhaust system secondary silencer, including resonant cavity and Through the main perforated pipe of the resonant cavity, dividing plate is provided between main perforation pipe outer wall shakes cavity wall together, the dividing plate will altogether The chamber that shakes is divided at least two resonator chambers, and secondary perforated pipe, the pair are arranged with outside the main perforated pipe in wherein one resonant cavity The two ends of perforated pipe are connected with the resonator chamber where it.
Further, the resonator chamber is three, and the secondary perforated pipe is located at intermediate resonance chamber.
Further, the ring flange of connection fixed thereto is provided with the two ends of the main perforated pipe.
The beneficial effects of the utility model are:In limited space, resonator chamber is formed by increasing secondary perforated pipe, The noise reduction scope of silencer is widened.The utility model is simple in construction simultaneously, characteristics of compact layout.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is two chambers with the experiment effect figure of parallel resonance silencer and two chambers without parallel resonance silencer;
Fig. 3 is three chambers with the experiment effect figure of parallel resonance silencer and three chambers without parallel resonance silencer;
In figure:The main perforated pipes of 1-, 11- ring flanges;2- resonant cavities, 21- left end caps, 22- right end caps, 23- cylinders;3- every Plate;4- pair perforated pipes;The resonance cavity volumes of 5- first;The resonance cavity volumes of 6- second;The resonance cavity volumes of 7- the 3rd.
Embodiment
Referring to Fig. 1, the utility model automobile exhaust system pair silencer, including resonant cavity 2, main perforated pipe 1.Resonant cavity 2 Including left end cap 21, cylinder 23 and right end cap 22, left end cap 21 is sealedly connected on the left end of cylinder 23, and right end cap 22 is tightly connected In the right-hand member of cylinder 23.Center through-resonance of the main perforated pipe 1 being fixedly connected with left end cap 21 and right end cap 22 from resonant cavity 2 Chamber 2.Dividing plate 3 is interval between the inwall of resonant cavity 2 and the outer wall of main perforated pipe 1, two pieces of dividing plates 3 being parallel to each other will be altogether The chamber 2 that shakes has been divided into three resonator chambers, and three resonator chambers are successively from left to right:The first resonance resonance cavity volume of cavity volume 5, second 6 and the 3rd resonance cavity volume 7.Secondary perforated pipe 4 is provided with the second resonance cavity volume 6, secondary perforated pipe 4 is sheathed on outside main perforated pipe 1, Its two ends extends to dividing plate 3, and is fixedly connected with dividing plate 3.Ring flange 11, this reality are fixedly connected with the two ends of main perforated pipe 1 It is connected to new by ring flange 11 on engine exhaust conduit.
The arrangement of the relative second resonance cavity volume 6 of above-mentioned secondary perforated pipe 4, constitute the second resonance cavity volume 6 and allies the communists Shake cavity volume, and the above-mentioned silencer under such structure is referred to as:Three chambers band parallel resonance silencer.Without above-mentioned secondary perforated pipe 4 Silencer is then referred to as:Three chambers are without parallel resonance silencer.
In the above-described embodiments, resonant cavity 2 has been divided into three resonance cavity volumes by dividing plate 3.Certainly, changing with dividing plate quantity Become, its quantity for resonating cavity volume can also change therewith.Such as one piece dividing plate 3, then form two resonance cavity volumes;Three pieces of dividing plates 3, then Form four resonance cavity volumes.
Referring to Fig. 2, when resonance cavity volume is two, two chambers band parallel resonance silencer and two chambers are without parallel resonance silencer Experiment effect figure.
Two chambers have good soundproof effect without parallel resonance silencer in intermediate frequency and high frequency, but in 640Hz or so almost There is no soundproof effect.Two chamber silencers are added after secondary perforated pipe, and soundproof effect has been lifted in 460-860 frequency domains, and is disappeared Acoustic curve is more gentle, and full frequency-domain has good effect.
Referring to Fig. 2, when resonance cavity volume is three, three chambers band parallel resonance silencer and three chambers are without parallel resonance silencer Experiment effect figure.
The universal soundproof effect of three chamber silencers is relatively good, in three chambers after a certain secondary perforated pipe of chamber increase, from After 300Hz, soundproof effect has been lifted in each frequency, effect is lifted on high frequency more obvious.
With reference to above-mentioned Fig. 2 and Fig. 3, it can be seen that the silencer with secondary perforated pipe can effectively expand original silencer The scope of noise reduction.
It is a complex engineering that silencer, which is eliminated the noise, punching rate, aperture, and the factor such as cavity volume, which can influence to eliminate the noise, imitates Really.The combination of different structure also needs careful calculating with using.Therefore, the Contrast on effect in above-mentioned Fig. 2, Fig. 3 is identical at certain The effect that specific structure is issued to, not any similar structures can have such effect.But, from Fig. 2, Fig. 3 contrast From the point of view of, the effect with parallel resonance silencer is better than the effect without parallel resonance silencer.

Claims (3)

1. a kind of secondary silencer of automobile exhaust system, including resonant cavity(2)With through the resonant cavity(2)Main perforated pipe(1), In main perforated pipe(1)Outer wall and resonant cavity(2)Dividing plate is provided between inwall, the dividing plate is by resonant cavity(2)It is divided at least two Resonator chamber a, it is characterised in that resonant cavity wherein(2)Interior main perforated pipe(1)Secondary perforated pipe is arranged with outside(4), institute State secondary perforated pipe(4)Two ends and resonator chamber where it is affixed.
2. the secondary silencer of automobile exhaust system as claimed in claim 1, it is characterised in that the resonator chamber is three, institute State secondary perforated pipe(4)Positioned at intermediate resonance chamber.
3. the secondary silencer of automobile exhaust system as claimed in claim 2, it is characterised in that in the main perforated pipe(1)Two Ring flange of the end provided with connection fixed thereto(11).
CN201720015374.XU 2017-01-06 2017-01-06 A kind of secondary silencer of automobile exhaust system Active CN206397562U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720015374.XU CN206397562U (en) 2017-01-06 2017-01-06 A kind of secondary silencer of automobile exhaust system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720015374.XU CN206397562U (en) 2017-01-06 2017-01-06 A kind of secondary silencer of automobile exhaust system

Publications (1)

Publication Number Publication Date
CN206397562U true CN206397562U (en) 2017-08-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720015374.XU Active CN206397562U (en) 2017-01-06 2017-01-06 A kind of secondary silencer of automobile exhaust system

Country Status (1)

Country Link
CN (1) CN206397562U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107489490A (en) * 2017-09-26 2017-12-19 奇瑞汽车股份有限公司 Exhaust silencer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107489490A (en) * 2017-09-26 2017-12-19 奇瑞汽车股份有限公司 Exhaust silencer

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