CN2786287Y - Exhaust muffler for heavy automobile engine - Google Patents
Exhaust muffler for heavy automobile engine Download PDFInfo
- Publication number
- CN2786287Y CN2786287Y CN 200520009254 CN200520009254U CN2786287Y CN 2786287 Y CN2786287 Y CN 2786287Y CN 200520009254 CN200520009254 CN 200520009254 CN 200520009254 U CN200520009254 U CN 200520009254U CN 2786287 Y CN2786287 Y CN 2786287Y
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- CN
- China
- Prior art keywords
- hush tube
- aperture
- exhaust muffler
- muffling
- outlet pipe
- 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
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Abstract
The utility model relates to an exhaust muffler for a heavy automobile engine, which is characterized in that two to four partition boards are installed in a shell body (1); more than one muffling pipes (9) are fixed on the partition boards; the muffling pipes (9), an air outlet pipe (10) and an air inlet pipe (11) are independent pipelines; the muffling pipes are distributed along the radial circumference of the shell body (1) and are arrayed in the axial direction in a mode of displacement; one end of each of the muffling pipes is closed, and the other end is provided with an opening; the pipe wall of each of the muffling pipes is provided with small holes, and the total area of the small holes is larger than the total section area of the same muffling pipe (9). The exhaust muffler for a heavy automobile engine has the advantage of reasonable and compact structure; the muffling quantity can reach the value more than 25 dB (A), and the highest value can reach 31.5 dB (A); the exhaust muffler for a heavy automobile engine completely meets the requirements of a new standard GB 1495-2002 of China, and compared with the original muffler, the muffling quantity of the utility model is increased by more than ten decibels; the power loss ratio is small, and theperformances are superior.
Description
Technical field:
The utility model relates to a kind of silencing apparatus, especially the heavy-duty car engine exhaust muffler.
Background technique:
At present, China's heavy-duty car adopts (240-450) PS supercharged diesel engine mostly, with its equipped mutually silencing apparatus, although its profile, size, structure, performance are different, but form by housing, end cap, dividing plate, hush tube, suction tude, steam outlet pipe mostly, the hush tube that is adopted all is through-pipe structure, usually has only a hush tube, it is same pipeline that hush tube, suction tude, steam outlet pipe are also arranged, and the aperture that distributes on hush tube is the arrangement of sphere of movements for the elephants shape, hole pitch is unequal, as shown in Figure 1.Therefore, existing silencing apparatus noise elimination effect is relatively poor, and it is all very little to insert loss (sound deadening capacity), only shellfish to tens decibel in a measure.Do not satisfy the GB1495-2002 NBS.The power loss ratio that has is very big, very oil consumption.
The purpose of this utility model:
In order to overcome the defective of prior art, it is effective that the purpose of this utility model provides a kind of noise elimination, and its sound deadening capacity meets the heavy-duty car engine exhaust muffler of national new standard GB1495-2002.
Concrete scheme of the present utility model is: design a kind of heavy-duty car engine exhaust muffler, comprise housing, back backplate, rear end cover, hush tube, steam outlet pipe, suction tude, front cover, apron plate, it is characterized in that: 2～4 dividing plates are installed in housing, on dividing plate, are fixed with more than one hush tube; Hush tube, steam outlet pipe, suction tude are independent tubes, and hush tube is pressed the housing radial circumference and distributed, and axially dislocation is arranged; One end of each hush tube seals, and the other end is an opening; Have aperture on the hush tube tube wall, the summation of little hole area is greater than the summation of this hush tube sectional area, and aperture is done preferable in a triangle.
Also have aperture on described steam outlet pipe, the suction tude, aperture area summation is greater than the summation of the sectional area of steam outlet pipe that is depended on or suction tude.
Described aperture on hush tube, steam outlet pipe, suction tude is interspersed, and the distance between each aperture equates as far as possible.
Described at housing or/and front cover or/and the inwall of rear end cover is provided with alkali-free glass cotton and alkali-free glass cloth, the alkali-free glass cotton is positioned between the two; Arranged outside at alkali-free glass cloth has backplate, has aperture on described backplate.
The utility model constitutes seal space jointly by housing and front and rear cover, and plays the sound insulation effect; Is 3～5 chambeies with 2～4 dividing plates with the silencing apparatus volume separation, plays buffering, stable and eliminate the effect of basic, normal, high audio-frequency noise respectively; Stamp out many apertures on hush tube, steam outlet pipe, suction tude, the distance between each aperture equates as far as possible; And, make air-flow flow out equably or flow into from aperture with the endcapped of hush tube; Simultaneously, hush tube in the housing is made one or two or three or four or the like, hush tube and steam outlet pipe, suction tude are not same pipes, and press the housing radial circumference and distribute, axially dislocation is arranged, make the common air-flow path of forming of hush tube and the cavity flow direction of steering flow and the even propagation of sound wave in an orderly manner, further play the noise elimination effect; Or/and front cover or/and the inwall of rear end cover is provided with alkali-free glass cotton and alkali-free glass cloth and backplate, plays sound absorption, thereby guarantees sound deadening capacity, reach the effective purpose of eliminating the noise at housing.
Adopt the beneficial effect of such scheme to be: sound deadening capacity reaches as high as 31.5dB (A) up to more than the 25dB (A), satisfies the requirement of national new standard GB1495-2002 fully, increases by tens decibels sound deadening capacity than original silencing apparatus; And power loss ratio is little, superior performance.
Description of drawings:
Fig. 1 is the conventional muffler structural representation;
Fig. 2 is a plan view of the present utility model;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the C-C sectional view of Fig. 2.
Please see Figure 2, Fig. 3, Fig. 4, the utility model mainly is made up of housing 1, back backplate 5, rear end cover 6, alkali-free glass cloth 7, alkali-free glass cotton 8, eight hush tubes 9, steam outlet pipe 10, suction tude 11, front cover 12, apron plates 13, wherein constitute seal space jointly by housing 1, rear end cover 6, front cover 12,2～4 dividing plates are installed in housing 1, are first chamber 2, second chamber 3 and the 3rd chamber 4 with the silencing apparatus volume separation; On dividing plate, be fixed with more than one hush tube 9; Hush tube 9, steam outlet pipe 10, suction tude 11 are independent tubes, and hush tube 9 is pressed housing 1 radial circumference and distributed (as Fig. 4), and axially (as Fig. 2) arranged in dislocation; One end of each hush tube 9 seals, and the other end is an opening, has aperture on hush tube 9 tube walls, and the summation of little hole area is greater than the summation of these hush tube 9 sectional areas.Be Pin Zixing between the adjacent aperture, also can directly do aperture in a triangle.
Present embodiment also has aperture on steam outlet pipe 10, suction tude 11, aperture area summation is greater than the summation of the sectional area of steam outlet pipe 10 that is depended on or suction tude 11.
As Fig. 2, shown in Figure 3: the aperture on hush tube 9, steam outlet pipe 10, suction tude 11 is interspersed, and the distance between each aperture equates.
Also can see from Fig. 2: at housing 1 or/and front cover 12 or/and the inwall of rear end cover 6 is provided with alkali-free glass cotton 8 and alkali-free glass cloth 7, alkali-free glass cotton 8 is positioned between the two.Arranged outside at alkali-free glass cloth 7 has backplate 5 or 13, has aperture on described backplate, is convenient to sound wave and is absorbed by alkali-free glass cotton 8 and alkali-free glass cloth 7.
Pipe and tail pipe constitute automobile engine exhaust system jointly before the utility model and enmgine exhaust, the silencing apparatus.The suction tude of muffler assembly is connected with pipe before the silencing apparatus, and the pipe the other end is connected with the automobile engine to exhaust manifold outlet before the silencing apparatus, and the air outlet of muffler assembly is connected with tail pipe, and logical atmosphere.
The silencing apparatus mounting point: generally be installed in above the sinistral carriage of automotive body back or below, also can be installed in below the automobile front beam as required.
Working principle:
Before high temperature and high speed pulse pneumatic that motor is discharged is by enmgine exhaust, silencing apparatus, manage, enter the intake noise reduction pipe of silencing apparatus, and a hundreds of aperture that passes through hush tube disperses ejection, enter in silencing apparatus first cavity, the air current flow direction changes 90 °, the gas that enters in first chamber is fully expanded, is cushioned, airspeed descends greatly, energy reduces, the partial noise frequency is filtered, be filtered one by one in afterwards second chamber of the noise frequency that leaked, the 3rd chamber, the 4th chamber, noise is reduced.Then, gas from middle hush tube that one, two chambeies are connected a hundreds of aperture ejection, enter in second chamber and expand, cushion, the air current flow direction changes 90 ° again; In like manner, connect two, three chambeies or connect the middle hush tube in three, four chambeies, all have many apertures, air current flow all changes 90 °.The gas degree reduces, and air-flow velocity is near mean velocity, and the noise that is produced is also less.At last, gas enters exhaust duct by the aperture in the exhausting silencer pipe of silencing apparatus, then, enters in the atmosphere by muffler tail pipe again.
In sum, the noise elimination of heavy-duty car exhaust silencer is to adopt the long-pending optimisation technique of airflow section, and the air-flow of pulsing is at a high speed become the low speed steady flow, reduces noise; Adopt micropore jet, low frequency is shifted to middle and high frequency, be easy to eliminate the noise; Repeatedly change the air current flow direction, make sound wave and airflow breakaway, reduce noise; The sound wave that utilizes gas flow to produce has phase difference, makes the crest of sound wave and the trough part of cancelling out each other, and reduces noise.
Claims (5)
1. heavy-duty car engine exhaust muffler, comprise housing (1), back backplate (5), rear end cover (6), hush tube (9), steam outlet pipe (10), suction tude (11), front cover (12), apron plate (13), it is characterized in that: 2～4 dividing plates are installed in housing (1), on dividing plate, are fixed with more than one hush tube (9); Hush tube (9), steam outlet pipe (10), suction tude (11) are independent tubes, and hush tube (9) is pressed housing (1) radial circumference and distributed, and axially dislocation is arranged; One end of each hush tube (9) seals, and the other end is an opening; Have aperture on hush tube (9) tube wall, the summation of little hole area is greater than the summation of this hush tube (9) sectional area.
2. heavy-duty car engine exhaust muffler according to claim 1 is characterized in that: steam outlet pipe (10), suction tude also have aperture on (11), and aperture area summation is greater than the summation of the sectional area of steam outlet pipe that is depended on (10) or suction tude (11).
3. heavy-duty car engine exhaust muffler according to claim 1 and 2 is characterized in that: the aperture on hush tube (9), steam outlet pipe (10), suction tude (11) is interspersed, and the distance between each aperture equates.
4. heavy-duty car engine exhaust muffler according to claim 3, it is characterized in that: at housing (1) or/and front cover (12) or/and the inwall of rear end cover (6) is provided with alkali-free glass cotton (8) and alkali-free glass cloth (7), alkali-free glass cotton (8) is positioned between the two.
5. heavy-duty car engine exhaust muffler according to claim 4 is characterized in that: the arranged outside at alkali-free glass cloth (7) has backplate (5 or 13), has aperture on backplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520009254 CN2786287Y (en) | 2005-05-09 | 2005-05-09 | Exhaust muffler for heavy automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520009254 CN2786287Y (en) | 2005-05-09 | 2005-05-09 | Exhaust muffler for heavy automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2786287Y true CN2786287Y (en) | 2006-06-07 |
Family
ID=36774862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520009254 Expired - Fee Related CN2786287Y (en) | 2005-05-09 | 2005-05-09 | Exhaust muffler for heavy automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2786287Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894872A (en) * | 2017-02-06 | 2017-06-27 | 潘泉方 | Vehicle/locomotive engine exhaust emissions flood prevents permeable exhaust silencer |
-
2005
- 2005-05-09 CN CN 200520009254 patent/CN2786287Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894872A (en) * | 2017-02-06 | 2017-06-27 | 潘泉方 | Vehicle/locomotive engine exhaust emissions flood prevents permeable exhaust silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060607 Termination date: 20140509 |