CN102606268B - Reactive muffler for engineering machine - Google Patents
Reactive muffler for engineering machine Download PDFInfo
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- CN102606268B CN102606268B CN 201210106785 CN201210106785A CN102606268B CN 102606268 B CN102606268 B CN 102606268B CN 201210106785 CN201210106785 CN 201210106785 CN 201210106785 A CN201210106785 A CN 201210106785A CN 102606268 B CN102606268 B CN 102606268B
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- hush pipe
- hush
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Abstract
The invention discloses a reactive muffler for an engineering machine, which comprises a flange plate, a connecting pipe, a barrel and a smoke exhaust pipe. The inside of the barrel is sequentially divided into a cavity I, a cavity II and a cavity III by a front partition board and a rear partition board from front to back, two first sound attenuation barrels which are positioned in the cavity I and the cavity II are disposed on the front partition board, two second sound attenuation barrels are arranged in the cavity II, a third sound attenuation barrel is disposed in the cavity III, the first sound attenuation barrels and the second sound attenuation barrels are arranged along the axial direction of the barrel, the third sound attenuation barrel is perpendicular to the first sound attenuation barrels and the second sound attenuation barrels, the connecting pipe and the smoke exhaust pipe are perpendicularly connected onto the barrel and are spatially perpendicularly arranged in a crossed manner, the connecting pipe is communicated with the cavity I, the smoke exhaust pipe is communicated with the cavity III, and the flange plate is connected with the cavity I via the connecting pipe. The reactive muffler is reasonable in structure, fine in acoustic performance and long in service life, regenerated noise of airflow is low, and a muffler effect for low, medium and high-frequency noise of exhaust of an engine is remarkable.
Description
Technical field
The present invention relates to a kind of silencing apparatus, especially a kind of reactive muffler for engineering machinery.
Background technique
Engineering machinery is mainly used in industry as the major component of social development, agricultural, fields such as traffic.Yet its noise problem that produces is a problem demanding prompt solution always.Reactive muffler has obtained extensive use as the silencer that the car combustion engine vent systems extensively adopts in fields such as engineering machinery, and the research and development of well behaved silencing apparatus have great importance.Because have that the operation operating mode of engineering machinery is abominable, the vibration of power and equipment (motor, fluid power system and power train etc.), can produce strong vibration and noise when pretending industry.Along with the modernization construction engineering development.Engineering machinery more and more develops towards complicated, maximization and speed up direction.Its vibration and noise problem seem more outstanding, and the noise of building construction has become one of the main noise source in city.Reactive muffler is one of main path of existing Control Engineering mechanical noise, the raising of silencing apparatus design level has important meaning for promoting China's engineering machinery complete machine quality, and inserting loss and the pressure loss is to estimate two very important evaluation indexes of silencing apparatus acoustic attenuation performance and aerodynamic quality.The design studies silencing apparatus makes it when increasing transmission loss, guarantee the pressure loss in the scope of motor requirement with the interior important means that reduces noise that becomes.
Chinese patent ZL201020675590.5 discloses a kind of diesel engine silencer, and it comprises muffler body, is installed on suction tude and tailpipe on the muffler body; Described muffler body is divided into three noise elimination chambers by preceding dividing plate and rear bulkhead; Described suction tude links to each other with interpolation pipe; Dividing plate is provided with four gas diversion tubes that are communicated with first chamber and second chamber before described; Described rear bulkhead is provided with the perforated pipe that is communicated with second chamber and the 3rd chamber.But this patent is the straight-through type silencing apparatus, and air flow direction is single, does not take full advantage of offseting mutually of air-flow.
Chinese patent ZL201110201160.9 discloses a kind of diesel engine exhaust muffler of composite structure, it comprises flange, muffler body, suction tude, tailpipe, comprise the preceding perforated pipe that places muffler body inside, preceding interpolation pipe, back interpolation pipe and back perforated pipe, be provided with the preceding dividing plate and the rear bulkhead that muffler body are divided into three chambers in the described muffler body, described flange links to each other with preceding perforated pipe one end by suction tude, the center of dividing plate arranges preceding interpolation pipe before described, N back interpolation pipe is set on the described rear bulkhead, and each back interpolation pipe equates to the centre distance of rear bulkhead, total cross-section area of N back interpolation pipe is less than the cross-section area of preceding interpolation pipe, wherein N 〉=2 and N are positive integer, and the front end of described tailpipe links to each other with back poling one end.But this patent is pure reactive muffler, does not use sound-absorbing material, and is not obvious at the acoustically effective of medium-high frequency section.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of rational in infrastructure, acoustical behavior is good, long service life, the air-flow regenerated noise is little, the noise elimination outstanding effect of the basic, normal, high audio-frequency noise of engine exhaust is used for the reactive muffler of engineering machinery.
For achieving the above object, the present invention adopts following technical proposals:
A kind of reactive muffler for engineering machinery comprises flange plate, connecting tube, cylindrical shell, smoke-ejecting pipe, according to inferior from front to back cylindrical shell is divided into chamber I, chamber II, chamber III by preceding dividing plate and rear bulkhead in the described cylindrical shell; Described preceding dividing plate is provided with two and is arranged in chamber I and two first hush pipes of chamber II, is provided with two second hush pipes in the chamber II, is provided with the 3rd hush pipe in the chamber III; Described first hush pipe and second hush pipe are all axial arranged along cylindrical shell, the 3rd hush pipe and first hush pipe and second hush pipe are arranged vertically, described connecting tube and smoke-ejecting pipe are vertically connected on the cylindrical shell, and the square crossing spatially of connecting tube and smoke-ejecting pipe is arranged, connecting tube is communicated with chamber I, and smoke-ejecting pipe chamber III is communicated with; Described flange plate links to each other with chamber I by connecting tube.
Described first, second, and third hush pipe is the direct current perforated pipe, and wherein, the length of first hush pipe in chamber I is 90% ± 5% of chamber I length, and the length in chamber II is 40% ± 5% of chamber II length; Second hush pipe runs through chamber II; The length of the 3rd hush pipe in chamber III is 90% ± 5% of chamber III length.
The punching rate of described first, second, and third hush pipe is 25% ± 5%, and the hole diameter on described first, second, and third hush pipe is 5mm.
Described cylindrical shell is divided into inner barrel and outer cylinder body, and two ends are by end plate closes, and quieter material is equipped with in the centre of inner barrel and outer cylinder body.
The ingress of described first hush pipe, second hush pipe and the 3rd hush pipe is all sealed by closure plate.
Advantage of the present invention is: (1) three chamber composite structure, and the link position of connecting tube and smoke-ejecting pipe and each perforated pipe makes the flow direction of air-flow reasonable, makes air-flow take full advantage of the flowing space of cavity; (2) use of a plurality of chambeies and a plurality of direct current perforated pipes makes air-flow and flows in each chamber and in the aperture, has increased sound deadening capacity, can also effectively reduce the air-flow regenerated noise, makes silencing apparatus that good noise elimination effect be arranged in full frequency band; (3) rational perforated pipe punching rate and size design and distribution scheme have increased air-flow effectively by area, thereby have reduced the air-flow regenerated noise.(4) first chambers can be subjected to the impact of exhaust, but the noise elimination effect in order to obtain can not increase the volume of first chamber arbitrarily, so increased the interpolation pipe shunting, makes it more reasonable.
Description of drawings
Fig. 1 is plan view of the present invention;
Fig. 2 is the left sectional view at connecting tube axis of the present invention place;
1 smoke-ejecting pipe wherein, 2 smoke evacuation bases, 3 the 3rd hush pipes, dividing plates before 4,5 second hush pipes, 6 cylindrical shells, 7 flange plate, 8 first hush pipes, 9 fixed plates, 10 second closure plates, 11. first closure plate, 12 the 3rd closure plates, 13 rear bulkheads, 14 end plates, 15 connecting tubes, 16 pipes that leak, 17 chamber I, 18 chamber II, 19 chamber III.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2, shown in, be used for the reactive muffler of engineering machinery, comprise flange plate 7, connecting tube 15, cylindrical shell 6, smoke-ejecting pipe 1, dividing plate 4 and rear bulkhead 13 are divided into cylindrical shell 6 chamber I17, chamber II18, chamber III19 successively before being provided with in the described cylindrical shell 6; Connecting tube 15 and smoke-ejecting pipe 1 all with 6 vertical linking to each other of cylindrical shell, smoke-ejecting pipe 1 is arranged on the cylindrical shell on 6 by smoke evacuation base 2; Connecting tube 15 and smoke-ejecting pipe 1 square crossing spatially arrange that connecting tube 15 and smoke-ejecting pipe 1 are communicated with chamber I17, chamber III19 respectively; Flange plate 7 links to each other with chamber I17 by connecting tube 15; Be provided with two first hush pipes 8 in the chamber I17, be provided with two second hush pipes 5 in the chamber II18, be provided with the 3rd hush pipe 3 in the chamber III19.First hush pipe 8 and second hush pipe 5 are all axial arranged along cylindrical shell 6, and the 3rd hush pipe 3 and first hush pipe 8 and second hush pipe 5 are arranged vertically.The 3rd hush pipe 3 peripheries are provided with fixed plate 9.The cylindrical shell bottom that is positioned at chamber III19 is provided with the pipe 16 that leaks.
First, second, and third hush pipe 8,5,3 is the direct current perforated pipe, and wherein, the length of first hush pipe 8 in chamber I17 is 90% ± 5% of chamber I17 length, and the length in chamber II18 is 40% ± 5% of chamber II18 length; Second hush pipe 5 runs through chamber II18; The length of the 3rd hush pipe 3 in chamber III19 is 90% ± 5% of chamber III19 length.
First, second, and third hush pipe 8,5,3 punching rate are that 25% ± 5%, first, second, and third hush pipe 8,5,3 hole diameter are 5mm.
Cylindrical shell 6 is divided into inner barrel and outer cylinder body, and two ends are by end plate 14 sealing, and quieter material is equipped with in the centre of inner barrel and outer cylinder body.
First hush pipe, second hush pipe and the 3rd hush pipe 8,5,3 ingress are respectively by first closure plate 11, second closure plate 10,12 sealings of the 3rd closure plate.
During use, flange plate 7 is connected outlet pipe, make the gas of discharge enter chamber I17 by connecting tube 15, gas is entered in first hush pipe 8 by the aperture on the perforated pipe, enter chamber II18 subsequently, gas among the chamber II18 is entered in second hush pipe 5 by the aperture on the perforated pipe, enters chamber III14 subsequently; Gas among the chamber III14 enters the 3rd hush pipe 3 by the aperture on the perforated pipe, and last air-flow is discharged by smoke-ejecting pipe 1.Gas is constantly expanded contraction in this a series of action, this structural design has not only improved the air-flow divergence ratio of gas, thereby has increased sound deadening capacity, and has effectively reduced the air-flow regenerated noise.
Each silencer of inner barrel be combined as the impedance composite noise elimination structure, can lower the basic, normal, high audio-frequency noise of engine exhaust.
Though above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (3)
1. a reactive muffler that is used for engineering machinery comprises flange plate, connecting tube, cylindrical shell, smoke-ejecting pipe, according to inferior from front to back cylindrical shell is divided into chamber I, chamber II, chamber III by preceding dividing plate and rear bulkhead in the described cylindrical shell; Described preceding dividing plate is provided with two and is arranged in chamber I and two first hush pipes of chamber II, is provided with two second hush pipes in the chamber II, is provided with the 3rd hush pipe in the chamber III; It is characterized in that, described first hush pipe and second hush pipe are all axial arranged along cylindrical shell, the 3rd hush pipe and first hush pipe and second hush pipe are arranged vertically, described connecting tube and smoke-ejecting pipe are vertically connected on the cylindrical shell, and the square crossing spatially of connecting tube and smoke-ejecting pipe is arranged, connecting tube is communicated with the chamber I, and smoke-ejecting pipe chamber III is communicated with; Described flange plate links to each other with the chamber I by connecting tube; Described cylindrical shell is divided into inner barrel and outer cylinder body, and two ends are by end plate closes, and quieter material is equipped with in the centre of inner barrel and outer cylinder body; The ingress of described first hush pipe, second hush pipe and the 3rd hush pipe is all sealed by closure plate.
2. the reactive muffler for engineering machinery as claimed in claim 1, it is characterized in that, described first, second, and third hush pipe is the direct current perforated pipe, wherein, the length of first hush pipe in the chamber I is 90% ± 5% of chamber I length, and the length in the chamber II is 40% ± 5% of chamber II length; Second hush pipe runs through the chamber II; The length of the 3rd hush pipe in the chamber III is 90% ± 5% of chamber III length.
3. the reactive muffler for engineering machinery as claimed in claim 2 is characterized in that, the punching rate of described first, second, and third hush pipe is 25% ± 5%, and the hole diameter on described first, second, and third hush pipe is 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210106785 CN102606268B (en) | 2012-04-12 | 2012-04-12 | Reactive muffler for engineering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210106785 CN102606268B (en) | 2012-04-12 | 2012-04-12 | Reactive muffler for engineering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102606268A CN102606268A (en) | 2012-07-25 |
| CN102606268B true CN102606268B (en) | 2013-07-17 |
Family
ID=46523969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210106785 Expired - Fee Related CN102606268B (en) | 2012-04-12 | 2012-04-12 | Reactive muffler for engineering machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN102606268B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321716B (en) * | 2013-07-08 | 2015-09-16 | 山东大学 | The reactive muffler structure that a kind of perforated pipe and narrow slit resonant cavity combine |
| CN104675478A (en) * | 2015-03-11 | 2015-06-03 | 河南柴油机重工有限责任公司 | Exhaust muffler for box type generating unit |
| CN106321193A (en) * | 2016-10-25 | 2017-01-11 | 力帆实业(集团)股份有限公司 | Rear silencer of sedan |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534568A (en) * | 1939-05-01 | 1941-03-10 | Burgess Battery Co | Improvements in or relating to silencing devices for flowing, pulsating gases |
| CN87207078U (en) * | 1987-05-20 | 1988-03-09 | 张鹏翊 | Bag with coated binder |
| JPH11117724A (en) * | 1997-10-13 | 1999-04-27 | Hoei Kogyo Kk | Muffler for internal combustion engine |
| GB2346413B (en) * | 1999-02-05 | 2003-08-13 | Komatsu Mfg Co Ltd | Exhaust silencer |
| CN2809234Y (en) * | 2005-07-27 | 2006-08-23 | 林辉江 | Exhaust muffler for diesel engine of railway passenger car with air conditioner |
| CN2816372Y (en) * | 2005-08-15 | 2006-09-13 | 林辉江 | IC engine exhausting silencer for passenger and goods automobile |
| CN201318206Y (en) * | 2008-12-05 | 2009-09-30 | 福建泰德机械工业有限公司 | Three-stage silencer for diesel generator group |
| CN201714459U (en) * | 2010-05-28 | 2011-01-19 | 浙江大学 | Automobile exhaust silencer |
| CN201687551U (en) * | 2010-06-01 | 2010-12-29 | 安徽江淮汽车股份有限公司 | Heavy truck muffler |
| CN201865723U (en) * | 2010-11-24 | 2011-06-15 | 郑州三维内燃机净化消声技术有限公司 | Automobile exhaust silencer |
| CN102322326B (en) * | 2011-07-07 | 2013-01-23 | 力士德工程机械股份有限公司 | Novel muffler for excavator |
| CN202544980U (en) * | 2012-04-12 | 2012-11-21 | 山东大学 | Reactive muffler for engineering machine |
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2012
- 2012-04-12 CN CN 201210106785 patent/CN102606268B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN102606268A (en) | 2012-07-25 |
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Granted publication date: 20130717 |