CN202946221U - Internal combustion engine silencer and internal combustion engine - Google Patents
Internal combustion engine silencer and internal combustion engine Download PDFInfo
- Publication number
- CN202946221U CN202946221U CN 201220524390 CN201220524390U CN202946221U CN 202946221 U CN202946221 U CN 202946221U CN 201220524390 CN201220524390 CN 201220524390 CN 201220524390 U CN201220524390 U CN 201220524390U CN 202946221 U CN202946221 U CN 202946221U
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- cavity
- expansion cavity
- combustion engine
- internal combustion
- expansion
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Abstract
The utility model discloses an internal combustion engine silencer and an internal combustion engine. The internal combustion engine exhaust silencer comprises a cylinder body, a gas inlet pipe, and a gas outlet pipe. An expansion cavity is formed in the cylinder body. The gas inlet pipe and the gas outlet pipe are communicated with the expansion cavity. A resonant cavity is formed in the cylinder body. A resonant cavity separating plate for separating the expansion cavity and the resonant cavity is further arranged in the cylinder body. A connecting pipe for communicating the expansion cavity and the resonant cavity is arranged on the resonant cavity separating plate. The gas inlet pipe and the gas outlet pipe are communicated with the expansion cavity. When gas penetrates through the internal combustion engine silencer, the gas penetrates through the gas inlet pipe into the expansion cavity, intermediate-frequency noise can be eliminated. In addition, part of the gas into the expansion cavity can enter the resonant cavity through the connecting pipe on the resonant cavity separating plate, a standing wave is formed in the resonant cavity, and thus low-frequency noise is eliminated. Therefore, noise of the gas exhausted by the expansion cavity and the resonant cavity can be effectively reduced.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of internal combustion engine exhaust silencer and internal-combustion engine.
Background technique
Silencing apparatus is to stop sound transmission and a kind of device of allowing air-flow to pass through, silencing apparatus is set for eliminating the important measures of exhaust sound.The application area of silencing apparatus is comparatively extensive, such as, be equipped with silencing apparatus in the passage of the vent systems of internal-combustion engine, aerodynamic force equipment (as blower, air compressor) or gas handling system, vent systems.
Take internal-combustion engine as example, the exhaust silencer that present internal-combustion engine uses is provided with expansion cavity, and the suction tude of exhaust silencer and steam outlet pipe all are communicated with expansion cavity, gas enters silencing apparatus from suction tude, discharge from steam outlet pipe, a part of noise can be disappeared, and the gas noise of discharge is minimized again.
Yet this reactive muffler is relatively good to the mid-frequency noise effect, and can't eliminate the lower exhaust sound of frequency ratio, and is in addition, also limited to the soundproof effect of high-frequency noise.
In view of this, how improving the internal combustion engine exhaust silencer internal structure, can eliminate outstanding low-frequency noise, is the technical problem that those skilled in the art need to be resolved hurrily.
The model utility content
For solving the problems of the technologies described above, the utility model provides a kind of internal combustion engine exhaust silencer, and this internal combustion engine exhaust silencer is provided with resonant cavity and aluminum fiberboard, has eliminated the low frequency exhaust sound.
The internal combustion engine exhaust silencer that the utility model provides, have cylindrical shell, suction tude and steam outlet pipe, comprise expansion cavity in described cylindrical shell, described suction tude and described steam outlet pipe are communicated with described expansion cavity, also be provided with resonant cavity in described cylindrical shell, and the resonant cavity dividing plate that separates described expansion cavity and described resonant cavity, described resonant cavity dividing plate is provided with the connecting tube that is communicated with described expansion cavity and described resonant cavity, and described suction tude and described steam outlet pipe all are communicated with described expansion cavity.
Preferably, described resonant cavity is positioned at an end of described cylindrical shell; The number of described expansion cavity is more than one, and each described expansion cavity is cut apart and formed by being arranged at expansion cavity dividing plate in cylindrical shell, and described suction tude is communicated with the expansion cavity near described resonant cavity, and described steam outlet pipe is communicated with the expansion cavity away from described resonant cavity.
Preferably, end portion cavity and the dividing plate between adjacent expansion cavity at the described cylindrical shell the other end is aluminum fiberboard; And described steam outlet pipe is communicated with the expansion cavity adjacent with described end expansion cavity.
Preferably, described resonant cavity sequentially is provided with the first expansion cavity, the second expansion cavity, the 3rd expansion cavity between the expansion cavity of described end; Described suction tude, described steam outlet pipe are communicated with described the first expansion cavity, described the 3rd expansion cavity respectively.
Preferably, be provided with perforated pipe in described the second expansion cavity; One end of described perforated pipe is connected to the expansion cavity dividing plate between described the second expansion cavity and described the 3rd expansion cavity mutually, and the other end runs through the expansion cavity dividing plate between described the second expansion cavity and described the first expansion cavity; Described perforated pipe is provided with the aperture that is communicated with described the first expansion cavity and described the second expansion cavity.
Preferably, also be provided with 4 equally distributed Inserting Tubes in described cylindrical shell, described Inserting Tube connects the expansion cavity dividing plate between described the second expansion cavity and described the 3rd expansion cavity, in order to be communicated with described the second expansion cavity and described the 3rd expansion cavity.
Preferably, described cylindrical shell comprises urceolus and inner core, is provided with thermal-protective material between described urceolus and described inner core.
Preferably, described thermal-protective material is heat insulation asbestos.
Preferably, described inner core is provided with aperture.
When the high pressure-temperature gas that internal-combustion engine is discharged passed through this silencing apparatus, in suction tude entered the expansion cavity of silencing apparatus inside, expansion cavity utilized the sudden change that in duct acoustics, pipeline section amasss to cause the variation of acoustic impedance, thereby has eliminated the mid-frequency noise of gas; In addition, the noise corresponding with the resonance cavity resonant frequency that enters in expansion chamber can be tackled by resonant cavity via connecting tube, thereby disappears corresponding low-frequency noise.
In further embodiment, at expansion cavity place corresponding to steam outlet pipe, also be provided with aluminum fiberboard, aluminum fiberboard can sponge the high-frequency noise of gas.Therefore the noise via this silencing apparatus can be eliminated in the scope of basic, normal, high frequency.
The utility model also provides a kind of internal-combustion engine, comprises gas exhaust piping, is in series with internal combustion engine exhaust silencer in described gas exhaust piping, and described internal combustion engine exhaust silencer is the described internal combustion engine exhaust silencer of above-mentioned any one.Because above-mentioned internal combustion engine exhaust silencer has above-mentioned technique effect, the internal-combustion engine with this internal combustion engine exhaust silencer also has identical technique effect.
Description of drawings
Fig. 1 provides the structural representation of a kind of embodiment of internal combustion engine exhaust silencer for the utility model.
In Fig. 1:
1 resonant cavity, 2 resonant cavity dividing plates, 3 first expansion cavities, 4 first expansion cavity dividing plates, 5 second expansion cavities, 6 second expansion cavity dividing plates, 7 the 3rd expansion cavities, 8 steam outlet pipes, 9 aluminum fiberboards, 10 cavitys, 11 heat insulation asbestos, 12 Inserting Tubes, 13 inner cores, 14 perforated pipes, 141 apertures, 15 suction tude, 16 connecting tubes, 17 urceolus, 18 sound absorption apertures
Embodiment
Core of the present utility model is to provide a kind of internal combustion engine exhaust silencer, and this internal combustion engine exhaust silencer is provided with resonant cavity and aluminum fiber acoustic board, has eliminated low, high frequency exhaust sound.Another core of the present utility model is to provide a kind of internal-combustion engine that comprises above-mentioned internal combustion engine exhaust silencer.
In order to make those skilled in the art understand better the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 provides the structural representation of a kind of embodiment of internal combustion engine exhaust silencer for the utility model.
Internal combustion engine exhaust silencer in this embodiment has cylindrical shell, and is located at suction tude 15 and steam outlet pipe 8 on cylindrical shell.Inner barrel has expansion cavity, and suction tude 15 and steam outlet pipe 8 all are communicated with expansion cavity, and gas then is discharged through steam outlet pipe 8 after suction tude 15 flows into expansion cavities.Also be provided with resonant cavity 1 in the cylindrical shell of silencing apparatus, resonant cavity 1 and expansion cavity are separated by resonant cavity dividing plate 2, and resonant cavity dividing plate 2 is provided with connecting tube 16, and connecting tube 16 is communicated with resonant cavities 1 and adjacent expansion cavity with it.
Particularly, the two ends of the inner barrel shown in figure are respectively resonant cavity 1 and end portion cavity 10, separate by two expansion cavity dividing plates (the first expansion cavity dividing plate 4 as shown in FIG. and the second expansion cavity dividing plate 6) the first expansion cavity 3, the second expansion cavity 5, the 3rd expansion cavity 7 that forms between resonant cavity 1 and end portion cavity 10, be that each expansion cavity and resonant cavity 1 sequentially arrange along the cylindrical shell length direction, the expansion cavity adjacent with resonant cavity 1 is the first expansion cavity 3, and connecting tube 16 is communicated with the first expansion cavity 3 and resonant cavity 1.Wherein, suction tude 15 is communicated with the first expansion cavity 3, and steam outlet pipe 8 is communicated with the 3rd expansion cavity 7.
When the suction tude 15 of the noise that internal-combustion engine is discharged by silencing apparatus enters the first expansion cavity 3 of silencing apparatus inside, the first expansion cavity 3 utilizes the long-pending sudden change of pipeline section in duct acoustics to cause the variation of acoustic impedance, eliminate the mid-frequency noise of gas, all the other expansion cavities further reach the effect of eliminating mid-frequency noise; And when entering the first expansion cavity 3, the exhaust sound that the resonant frequency of resonant cavity 1 is identical can be tackled by resonant cavity 1, produce resonance at the interior formation standing wave of resonant cavity 1, thereby the exhaust sound of this frequency that disappears, traditional dissipative muffler is difficult to eliminate low-frequency noise, and silencing apparatus of the present utility model is provided with resonant cavity 1, by the resonant frequency of resonant cavity 1 is set, can reach the effect of eliminating low-frequency noise.
For the various embodiments described above, the dividing plate between end portion cavity 10 and the 3rd expansion cavity 7 can be aluminum fiberboard 9, and wherein, steam outlet pipe 8 is communicated with three expansion cavity 7 adjacent with end portion cavity 10.Because aluminum fiberboard 9 is fibrous structure, have the micro hole on it, the micro hole can be used as a kind of damping, and during through this micro hole, portion of energy can be absorbed by micro hole damping, namely have the ability of absorbing high-frequency vibration noise when gas flow.When the 3rd expansion cavity 7 flowed to steam outlet pipe 8, the noise of gas can be by the aluminum fiberboard 9 absorbing high-frequency noises of the 3rd expansion cavity 7, thereby further reduce exhaust sound when noise.Be provided with end portion cavity 10 in this embodiment, obviously, it is also passable not arranging, but the end portion cavity 10 that arranges can improve the acoustically effective of aluminum fiberboard 9, and along with the length increase of end portion cavity 10, the acoustically effective of aluminum fiberboard 9 can increase thereupon.This shows, after expansion cavity, resonant cavity, aluminum fiberboard 9 are set, in, exhaust sound low, high frequency all can be eliminated by this silencing apparatus.
In above-described embodiment, in order farthest to play filter action, reach soundproof effect preferably, be provided with altogether three expansion cavities, each expansion cavity can be connected by perforated pipe 14, Inserting Tube 12.As shown in the figure, wherein in the second expansion cavity 5, perforated pipe 14 can be set, and an end of perforated pipe 14 is connected to the second expansion cavity dividing plate 6 between the second expansion cavity 5 and the 3rd expansion cavity 7 mutually, the other end of perforated pipe 14 runs through the first expansion cavity dividing plate 4 between the second expansion cavity 5 and the first expansion cavity 3, in order to be communicated with the first expansion cavity 3; And perforated pipe 14 is provided with the aperture 141 of communication bores pipe 14 inner chambers and the second expansion cavity 5.As can be seen from the figure, perforated pipe 14 is provided with some along its circumferential, axial uniform aperture 141, noise enters in perforated pipe 14 from the first expansion cavity 3, and in aperture 141 entered into the second expansion cavity 5, uniform aperture 141 was conducive to gas uniform and flow to rapidly the second expansion cavity 5.
Further, also be provided with 4 Inserting Tubes 12 in cylindrical shell, the second expansion cavity dividing plate 6 that Inserting Tube 12 connects between the second expansion cavity 5 and the 3rd expansion cavity 7 is in order to be communicated with the second expansion cavity 5 and the 3rd expansion cavity 7.Four Inserting Tubes 12 (only illustrating two in figure) are set, along circumferentially being distributed on the second expansion cavity dividing plate 6 places here.By the description of perforated pipe 14 as can be known, gas can lose certain energy by the aperture 141 on perforated pipe 14 time, therefore, can expect, the communication means between each expansion cavity all can adopt the structure of perforated pipe 14, thereby farthest eliminates noise.Because the distance between steam outlet pipe 8 and suction tude 15 is generally fixed, correspondingly, the limited length of expansion cavity, and need to reserve the space that connects steam outlet pipe 8, all adopt the structure connection of perforated pipe 14 spatially to be not easy to implement between adjacent expansion cavity, therefore in this embodiment, the second expansion cavity 5 and the 3rd expansion cavity 7 adopt Inserting Tube 12 to be communicated with, the meeting spatial demand is the scheme of comparatively optimizing.
In addition, for the various embodiments described above, can further optimize.The cylindrical shell of silencing apparatus can comprise urceolus 17 and inner core 13, and between urceolus 17 and inner core 13 filling with insulation material, as shown in the figure, each expansion cavity, resonant cavity 1, expansion cavity dividing plate, resonant cavity dividing plate 2 all are positioned at inner core 13 inside.So the silencing apparatus of design forms double layer construction, can reduce the vibration of silencing apparatus outer surface and the secondary radiation noise of generation; In addition, when high-temperature gas passed through silencing apparatus, the inner barrel temperature can raise, and heat is passed to the outer wall of cylindrical shell, obviously, after being designed to double insulation structure, can reduce the temperature of silencing apparatus outer wall, avoided human body to scald, and improved safety coefficient.The thermal-protective material of filling between inner core 13 and urceolus 17 can be heat insulation asbestos 11, can be also heat barrier foam, or other has the material of heat insulating function.
In addition, in the various embodiments described above, sound absorption aperture 18 can be set on inner core 13, the hole wall of sound absorption aperture 18 adopts the damping sound-absorbing material to make, and after gas entered cylinder lumen, sound absorption aperture 18 also can reduce gas noise to a certain extent.
Except above-mentioned internal combustion engine exhaust silencer, the utility model also provides a kind of internal-combustion engine, comprises gas exhaust piping, is in series with internal combustion engine exhaust silencer in gas exhaust piping, and described internal combustion engine exhaust silencer is the described internal combustion engine exhaust silencer of above-mentioned arbitrary embodiment.Because above-mentioned internal combustion engine exhaust silencer has above-mentioned technique effect, the internal-combustion engine with this silencing apparatus also has identical technique effect, repeats no more herein.
Above a kind of silencing apparatus provided by the utility model and internal-combustion engine with this silencing apparatus all are described in detail.Used specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. internal combustion engine exhaust silencer, have cylindrical shell, suction tude (15) and steam outlet pipe (8), comprise expansion cavity in described cylindrical shell, it is characterized in that, also be provided with resonant cavity (1) in described cylindrical shell, and the resonant cavity dividing plate (2) that separates described expansion cavity and described resonant cavity, described resonant cavity dividing plate (2) is provided with the connecting tube (16) that is communicated with described expansion cavity and described resonant cavity (1), and described suction tude (15) and described steam outlet pipe (8) all are communicated with described expansion cavity.
2. internal combustion engine exhaust silencer as claimed in claim 1, is characterized in that, described resonant cavity (1) is positioned at an end of described cylindrical shell; The number of described expansion cavity is more than one, each described expansion cavity is cut apart and is formed by being arranged at expansion cavity dividing plate in cylindrical shell, and described suction tude (15) is communicated with the expansion cavity near described resonant cavity (1), and described steam outlet pipe (8) is communicated with the expansion cavity away from described resonant cavity (1).
3. internal combustion engine exhaust silencer as claimed in claim 2, it is characterized in that, the described cylindrical shell the other end is provided with end portion cavity (10), is provided with aluminum fiberboard (11) between described end portion cavity (10) and the adjacent expansion cavity that is communicated with described steam outlet pipe (8).
4. internal combustion engine exhaust silencer as claimed in claim 3, is characterized in that, described resonant cavity (1) sequentially is provided with the first expansion cavity (3), the second expansion cavity (5), the 3rd expansion cavity (7) between described end portion cavity (10); Described suction tude (15), described steam outlet pipe (8) are communicated with described the first expansion cavity (3), described the 3rd expansion cavity (7) respectively.
5. internal combustion engine exhaust silencer as claimed in claim 4, is characterized in that, is provided with perforated pipe (14) in described the second expansion cavity (5); One end of described perforated pipe (14) is connected to the expansion cavity dividing plate between described the second expansion cavity (5) and described the 3rd expansion cavity (7) mutually, and the other end runs through the expansion cavity dividing plate between described the second expansion cavity (5) and described the first expansion cavity (3); Described perforated pipe (14) is provided with the aperture (141) that is communicated with described perforated pipe (14) inner chamber and described the second expansion cavity (5).
6. internal combustion engine exhaust silencer as described in claim 4 or 5, it is characterized in that, also be provided with 4 equally distributed Inserting Tubes (12) in described cylindrical shell, described Inserting Tube (12) connects the expansion cavity dividing plate between described the second expansion cavity (5) and described the 3rd expansion cavity (7), in order to be communicated with described the second expansion cavity (5) and described the 3rd expansion cavity (7).
7. as the described internal combustion engine exhaust silencer of claim 1-5 any one, it is characterized in that, described cylindrical shell comprises urceolus (17) and inner core (13), is provided with thermal-protective material between described urceolus (17) and described inner core (13).
8. internal combustion engine exhaust silencer as claimed in claim 7, is characterized in that, described thermal-protective material is heat insulation asbestos (11).
9. internal combustion engine exhaust silencer as claimed in claim 7, is characterized in that, described inner core is provided with sound absorption aperture (18).
10. an internal-combustion engine, comprise gas exhaust piping, is in series with internal combustion engine exhaust silencer in described gas exhaust piping, it is characterized in that, described internal combustion engine exhaust silencer is the described internal combustion engine exhaust silencer of claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524390 CN202946221U (en) | 2012-10-12 | 2012-10-12 | Internal combustion engine silencer and internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524390 CN202946221U (en) | 2012-10-12 | 2012-10-12 | Internal combustion engine silencer and internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946221U true CN202946221U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220524390 Expired - Lifetime CN202946221U (en) | 2012-10-12 | 2012-10-12 | Internal combustion engine silencer and internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946221U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889115A (en) * | 2012-10-12 | 2013-01-23 | 徐工集团工程机械股份有限公司科技分公司 | Internal combustion engine silencer and internal combustion engine |
| CN105156176A (en) * | 2014-06-04 | 2015-12-16 | 埃贝赫排气技术股份有限公司 | Muffler |
-
2012
- 2012-10-12 CN CN 201220524390 patent/CN202946221U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889115A (en) * | 2012-10-12 | 2013-01-23 | 徐工集团工程机械股份有限公司科技分公司 | Internal combustion engine silencer and internal combustion engine |
| CN102889115B (en) * | 2012-10-12 | 2015-07-15 | 徐工集团工程机械股份有限公司科技分公司 | Internal combustion engine silencer and internal combustion engine |
| CN105156176A (en) * | 2014-06-04 | 2015-12-16 | 埃贝赫排气技术股份有限公司 | Muffler |
| CN105156176B (en) * | 2014-06-04 | 2018-02-23 | 埃贝赫排气技术股份有限公司 | Muffler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130522 Effective date of abandoning: 20150715 |
|
| RGAV | Abandon patent right to avoid regrant |