CN203050848U - Vehicle muffler - Google Patents

Vehicle muffler Download PDF

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Publication number
CN203050848U
CN203050848U CN 201220640778 CN201220640778U CN203050848U CN 203050848 U CN203050848 U CN 203050848U CN 201220640778 CN201220640778 CN 201220640778 CN 201220640778 U CN201220640778 U CN 201220640778U CN 203050848 U CN203050848 U CN 203050848U
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CN
China
Prior art keywords
internal partition
pipe
noise elimination
vent
elimination chamber
Prior art date
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Expired - Lifetime
Application number
CN 201220640778
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Chinese (zh)
Inventor
魏鹏辉
杨亮
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
Original Assignee
Chongqing Changan Automobile 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.)
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Priority to CN 201220640778 priority Critical patent/CN203050848U/en
Application granted granted Critical
Publication of CN203050848U publication Critical patent/CN203050848U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model discloses a vehicle muffler, which is provided with four chambers, wherein an air inlet inner tube, an air outlet inner tube, an inner insert tube and a middle buffer tube are arranged in the four chambers. Ventilation holes are arranged in air inlet and outlet tubes and the inner insert tube, sound absorption materials are filled in a muffling chamber, and the middle buffer tube with a through hole is added, thus the performance of eliminating low-frequency, medium-frequency and high-frequency noise of a muffler can be effectively improved, the sound of a gas exhaust port is enabled to be pure and clean, the backpressure of a gas exhaust system is low, the structure is simple, the working reliability is high, the durability is excellent, and the manufacture cost is low.

Description

A kind of automotive muffler
Technical field
The utility model relates to the vent systems of motor car engine, is specifically related to a kind of automotive muffler.
Background technique
Along with automobile popularizing at home, client is more and more fastidious to the NVH performance of automobile, and vent systems reduces the vent systems noise and becomes the thorny problem that car load factory has to face as one of main noise source of automobile.Under the exhaust space condition of limited, vent systems low frequency sound deadening capacity and medium-high frequency sound deadening capacity be a pair of contradiction often.Before, I have proposed the model utility that name is called " a kind of automobile exhaust muffler " to State Patent Office, its application number is 2012202443994, be at the thunder a exhaust silencer of exploitation of automobile exhaust mouth low frequency, (direction of arrow is airflow direction and the path flow through among the figure) as shown in Figure 1.This vent systems low frequency noise elimination effect is very outstanding, but medium-high frequency noise elimination effect is relatively poor, and exhaust back pressure is also higher.Under the exhaust space condition of limited, solving vent systems low frequency sound deadening capacity and medium-high frequency sound deadening capacity simultaneously becomes a difficult problem that needs to be resolved hurrily.
Summary of the invention
Can not solve the problem of low frequency sound deadening capacity and medium-high frequency sound deadening capacity simultaneously at existing vent systems, the utility model provides a kind of automotive muffler, have preferably low frequency, intermediate frequency and high-frequency noise sound deadening capacity, relief opening sound is clean purely, the vent systems back pressure is low, simple in structure, the functional reliability height.
The technical solution of the utility model is as follows:
A kind of automotive muffler, comprise housing, lay respectively at the front cover of housing front-end and back-end enclosing housing and rear end cover, pipe and the interior pipe of giving vent to anger in first internal partition, second internal partition, the 3rd internal partition, air inlet, described first internal partition, second internal partition, the 3rd internal partition are divided into four chambers with described housing inner chamber, from left to right be followed successively by the first noise elimination chamber, the second noise elimination chamber, the 3rd noise elimination chamber and the 4th noise elimination chamber, it is characterized in that: be distributed with vent on first internal partition and second internal partition, do not have vent on the 3rd internal partition.
Be provided with pipe, the interior pipe of giving vent to anger, interpolation pipe and intermediate buffering pipe in the air inlet in the described housing; Pipe puts in from front cover in the described air inlet, passes first internal partition and second internal partition to the, three noise elimination chambers successively; Pipe passes first internal partition, second internal partition and the 3rd internal partition successively since the first noise elimination chamber in described the giving vent to anger, and stretches out from rear end cover; Described interpolation pipe passes described first internal partition, second internal partition and the 3rd internal partition to the four noise elimination chambers successively since the first noise elimination chamber; All there is not vent on pipe, give vent to anger interior pipe and the interpolation pipe in the described air inlet; Be distributed with vent on the described intermediate buffering pipe, it passes described first internal partition and second internal partition to the, three noise elimination chambers since the first noise elimination chamber.
The volume of the described second noise elimination chamber is less than the 3rd noise elimination chamber, and preferably the volume ratio of the described first noise elimination chamber, the second noise elimination chamber, the 3rd noise elimination chamber and the 4th noise elimination chamber is 5:4:10:10.
The indoor sound absorbing material that is filled with of described second noise elimination cavity is used for improving high-frequency noises, and better, described sound absorbing material is the glass fibre of 100-300g.
The air outlet of pipe and the distance of the 3rd internal partition are 70-80mm in the described air inlet, can improve the air-flow regenerated noise under the prerequisite that does not reduce the low frequency sound deadening capacity.
The suction port of pipe is the bell mouth shape structure in described the giving vent to anger, and is used for improving the air-flow regenerated noise and reduces exhaust back pressure.
Pipe, the interior pipe of giving vent to anger, interpolation pipe and intermediate buffering pipe are fixing with the internal partition welding of passing separately in the described air inlet, increase reliable in structure, durability.
Automotive muffler of the present utility model mainly is by structures such as internal partition, chamber, hush tube, intermediate buffering pipes, utilizes the principles such as interference, reflection of sound wave, relies on specified structure to eliminate noise.
Basic principle is, 1) cooperating by interpolation pipe and internal partition, the directing exhaust gas air-flow is by pipe in the air inlet, air-flow is more successively by aperture and each noise elimination chamber on the perforation dividing plate, noise is eliminated the noise by expansion cavity and internal partition reflection at the mouth of pipe successively, and partial noise is eliminated by the sound wave interference principle by the place at the perforation dividing plate; 2) air-flow passes through from middle separator tube, and air-flow is unobstructed, adds the indoor glass fibre that is filled with of second noise elimination cavity, can eliminate the part high-frequency noises; Have the intermediate buffering pipe of vent, can partly eliminate because air-flow passes the air-flow regenerated noise that produces from the vent of first internal partition and second internal partition is high-frequency noises, can reduce owing to air-flow all passes the bigger exhaust back pressure that produces from vent simultaneously; 3) connect the 4th noise elimination chamber by interpolation pipe and constitute structure of resonant cavity, utilize air in the resonant cavity under the sound wave effect, to weaken acoustic wave energy with friction energy loss that the interpolation tube wall produces, utilize this low-frequency resonance chamber emphasis to eliminate low frequency section noise.
The beneficial effects of the utility model:
1) the utility model is not because turnover tracheae and interpolation pipe have vent, the indoor filling sound absorbing material of noise elimination cavity, increase the intermediate buffering pipe that has through hole, can effectively improve low frequency, intermediate frequency and high-frequency noise through evidence and eliminate performance, and preparation process is simple, effectively reduces the silencing apparatus cost.
2) silencing apparatus low frequency of the present utility model, intermediate frequency and high-frequency noise sound deadening capacity are good, relief opening sound is clean purely, and the vent systems back pressure is low, and is simple in structure, functional reliability height, good endurance.
Description of drawings
Fig. 1 is that application number is the silencing apparatus concrete structure figure of 2012202443994 model utility, and arrow has been illustrated the air current flow direction among the figure;
Fig. 2 is silencing apparatus concrete structure figure of the present utility model, and arrow has been illustrated the air current flow direction among the figure;
Fig. 3 is the structure diagram of first internal partition 2 of the present utility model and second internal partition 3;
Fig. 4 is the structure diagram of the 3rd internal partition 4 of the present utility model.
Among the figure: 1, front cover; 2, first internal partition; 3, second internal partition; 4, the 3rd internal partition; 5, rear end cover; 6, pipe in the air inlet; 7, the interior pipe of giving vent to anger; 8, interpolation pipe; 9, the first noise elimination chamber; 10, the second noise elimination chamber; 11, the 3rd noise elimination chamber; 12, the 4th noise elimination chamber; 13, bell mouth shape structure; 14, housing; 15, intermediate buffering pipe; 16, sound absorbing material.
Embodiment
Below in conjunction with accompanying drawing 2,3,4 the invention will be further described.
Referring to Fig. 2,3,4, silencing apparatus of the present utility model is four pipes, four cavity configurations, comprise housing 14, lay respectively at front cover 1 and the rear end cover 5 of housing 14 front-end and back-end enclosing housings, from left to right vertically be provided with first internal partition 2, second internal partition 3 and the 3rd internal partition 4 respectively at described housing 14, be distributed with vent on first internal partition 2 and second internal partition 3, do not have vent on the 3rd internal partition 4.
Referring to Fig. 2, described three internal partitions are divided into four chambers with described housing 14 inner chambers, from left to right being followed successively by the first noise elimination chamber 9, the second noise elimination chamber 10, the 3rd noise elimination chamber 11 and the 4th noise elimination chamber 12 its volume ratios is 5:4:10:10, can reach better low frequency noise elimination effect; The indoor sound absorbing material 16 that is filled with of second noise elimination cavity is the 200g glass fibre.
Pipe 7, interpolation pipe 8 and intermediate buffering pipe 15 in housing 14, being welded with and managing 6 in the air inlet that is parallel to each other, giving vent to anger.
Referring to Fig. 2,3,4, pipe 6 is welded on the front cover 1 in the air inlet, passes first internal partition 2 and second internal partition 3 successively, and is connected and fixed by spot welding with described first internal partition 2 and second internal partition 3 respectively; The air outlet of pipe 6 is communicated with the 3rd noise elimination chamber 11 in the described air inlet, and with the distance of the 3rd internal partition 4 be 70mm, can under the prerequisite that does not reduce the low frequency sound deadening capacity, improve the air-flow regenerated noise.
Pipe 7 is welded on the rear end cover 5 in giving vent to anger, pass first internal partition 2, second internal partition 3 and the 3rd internal partition 4 successively, respectively with described in be connected and fixed by spot welding every 2,3 plates, be connected with described internal partition 4 full welds, its suction port is communicated with the first noise elimination chamber 9, and be bell mouth shape structure 13, have the air-flow of improvement regenerated noise and reduce the exhaust resistance effect.
All there is not vent on pipe 6, the interior pipe 7 of giving vent to anger in the air inlet; There is not perforation in the air inlet on the pipe 6 mainly in order to prevent too early in giving vent to anger, the revealing away the pipe 7 of low-frequency noise; Do not have perforation structure on the pipe 7 in giving vent to anger, this structure can effectively reduce the second order radiated noise of the motor slow-speed of revolution (2000rpm is following) relief opening by verification experimental verification.
There is not vent on the interpolation pipe 8, since the first noise elimination chamber 9, pass first internal partition 2, second internal partition 3 and the 3rd internal partition 4 successively, respectively with described in be connected and fixed by spot welding every 2,3 plates, be connected with described internal partition 4 full welds, its outlet end is communicated with the 4th noise elimination chamber 12.Interpolation pipe 8 is communicated with the 4th noise elimination chamber 12, form the low-frequency resonance chamber, can effectively weaken low frequency section noise energy, reach the purpose of eliminating low-frequency noise, volume by adjusting the 4th noise elimination chamber 12 and caliber and the length of interpolation pipe 8, the CF center frequency that makes described the 4th noise elimination chamber 12 is 50Hz, can eliminate low-frequency noise better.
Have the vent of some on the intermediate buffering pipe 15, described intermediate buffering pipe 15 is since the first noise elimination chamber 9, pass first internal partition 2 and second internal partition 3 successively, be connected and fixed by spot welding with described two internal partitions respectively, its outlet end is communicated with the 3rd noise elimination chamber 11.
By above structure, pipe 6, give vent to anger interior pipe 7, interpolation pipe 8 and intermediate buffering pipe 15 have the fixed connection point more than three, reliable in structure, good endurance in each air inlet in described housing 14.
Exhaust airstream is from managing 6 to the 3rd noise elimination chambers 11 through once expanding and reflect noise reduction in the air inlet; Part air-flow passes second internal partition 3 and first internal partition 2 successively, weakens noise energy through a plurality of vents interference on the described internal partition and noise elimination cavity locular wall reflection noise reduction, eliminates part medium and low frequency noise; Another part air-flow (main air flow) passes through from middle separator tube 15, air-flow is unobstructed, add in the second noise elimination chamber 10 and be filled with glass fibre, can eliminate the part high-frequency noises, have the intermediate buffering pipe 15 of vent, can partly eliminate because air-flow passes the air-flow regenerated noise that produces from the vent of first internal partition 2 and second internal partition 3 is high-frequency noises, can reduce owing to air-flow all passes the bigger pressure loss that produces from vent simultaneously.At last, air-flow through the 9 reflection noise eliminations of the first noise elimination chamber, is discharged from the interior pipe 7 of giving vent to anger finally by 13 collections of bell mouth shape structure again, thereby significantly reduces the discharge of low frequency, intermediate frequency and high-frequency noise.
The utility model can effectively reduce the discharge of low frequency, intermediate frequency and high-frequency noise through evidence, has preferably low frequency, intermediate frequency and high-frequency noise sound deadening capacity, relief opening sound is clean purely, and the vent systems back pressure is low, and is simple in structure, the functional reliability height.

Claims (8)

1. automotive muffler, comprise housing, lay respectively at the front cover of housing front-end and back-end enclosing housing and rear end cover, pipe and the interior pipe of giving vent to anger in first internal partition, second internal partition, the 3rd internal partition, air inlet, described first internal partition, second internal partition, the 3rd internal partition are divided into four chambers with described housing inner chamber, from left to right be followed successively by the first noise elimination chamber, the second noise elimination chamber, the 3rd noise elimination chamber and the 4th noise elimination chamber, it is characterized in that: be distributed with vent on first internal partition and second internal partition, do not have vent on the 3rd internal partition;
Be provided with pipe, the interior pipe of giving vent to anger, interpolation pipe and intermediate buffering pipe in the air inlet in the described housing;
Pipe puts in from front cover in the described air inlet, passes described first internal partition and second internal partition to the, three noise elimination chambers successively;
Pipe passes described first internal partition, second internal partition and the 3rd internal partition successively since the first noise elimination chamber in described the giving vent to anger, and stretches out from rear end cover;
Described interpolation pipe passes described first internal partition, second internal partition and the 3rd internal partition to the four noise elimination chambers successively since the first noise elimination chamber;
All there is not vent on pipe, give vent to anger interior pipe and the interpolation pipe in the described air inlet;
Be distributed with vent on the described intermediate buffering pipe, it passes described first internal partition and second internal partition to the, three noise elimination chambers since the first noise elimination chamber.
2. automotive muffler according to claim 1, it is characterized in that: the volume of the described second noise elimination chamber is less than the 3rd noise elimination chamber.
3. automotive muffler according to claim 1 is characterized in that: the indoor sound absorbing material that is filled with of described second noise elimination cavity.
4. automotive muffler according to claim 3, it is characterized in that: described sound absorbing material is the glass fibre of 100-300g.
5. automotive muffler according to claim 1 is characterized in that: the air outlet of pipe and the distance of the 3rd internal partition are 70-80mm in the described air inlet.
6. automotive muffler according to claim 1 is characterized in that: the suction port of pipe is the bell mouth shape structure in described the giving vent to anger.
7. automotive muffler according to claim 1 is characterized in that: pipe, the interior pipe of giving vent to anger, interpolation pipe and intermediate buffering pipe are fixed with the internal partition welding of passing separately in the described air inlet.
8. automotive muffler according to claim 1 is characterized in that: the volume ratio 5:4:10:10 of the described first noise elimination chamber, the second noise elimination chamber, the 3rd noise elimination chamber and the 4th noise elimination chamber.
CN 201220640778 2012-11-28 2012-11-28 Vehicle muffler Expired - Lifetime CN203050848U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220640778 CN203050848U (en) 2012-11-28 2012-11-28 Vehicle muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220640778 CN203050848U (en) 2012-11-28 2012-11-28 Vehicle muffler

Publications (1)

Publication Number Publication Date
CN203050848U true CN203050848U (en) 2013-07-10

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ID=48733809

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220640778 Expired - Lifetime CN203050848U (en) 2012-11-28 2012-11-28 Vehicle muffler

Country Status (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352738A (en) * 2013-07-25 2013-10-16 成都陵川特种工业有限责任公司 Silencer
CN106050751A (en) * 2016-07-22 2016-10-26 宁波方太厨具有限公司 Silencer of range hood
CN107956751A (en) * 2017-11-28 2018-04-24 徐工集团工程机械有限公司 Silencing apparatus and sweeping machine
CN108798828A (en) * 2018-06-25 2018-11-13 南京世界村汽车动力有限公司 A kind of car engine silencer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352738A (en) * 2013-07-25 2013-10-16 成都陵川特种工业有限责任公司 Silencer
CN106050751A (en) * 2016-07-22 2016-10-26 宁波方太厨具有限公司 Silencer of range hood
CN107956751A (en) * 2017-11-28 2018-04-24 徐工集团工程机械有限公司 Silencing apparatus and sweeping machine
CN107956751B (en) * 2017-11-28 2023-10-31 江苏徐工国重实验室科技有限公司 Silencing device and sweeping machine
CN108798828A (en) * 2018-06-25 2018-11-13 南京世界村汽车动力有限公司 A kind of car engine silencer

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Granted publication date: 20130710