CN102606268A - Reactive muffler for engineering machine - Google Patents

Reactive muffler for engineering machine Download PDF

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Publication number
CN102606268A
CN102606268A CN2012101067851A CN201210106785A CN102606268A CN 102606268 A CN102606268 A CN 102606268A CN 2012101067851 A CN2012101067851 A CN 2012101067851A CN 201210106785 A CN201210106785 A CN 201210106785A CN 102606268 A CN102606268 A CN 102606268A
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China
Prior art keywords
chamber
pipe
hush pipe
hush
cavity
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Application number
CN2012101067851A
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Chinese (zh)
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CN102606268B (en
Inventor
周以齐
王丽
方建华
薛源
窦青青
徐新东
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Shandong University
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Shandong University
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Publication of CN102606268B publication Critical patent/CN102606268B/en
Expired - Fee Related legal-status Critical Current
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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

The reactive muffler that is used for engineering machinery
Technical field
The present invention relates to a kind of silencing apparatus, especially a kind of reactive muffler that is used 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 the noise problem that it produced 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 muffler design level has important meaning for promoting China's engineering machinery complete machine quality, and inserting the 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; Said muffler body is divided into three noise elimination chambers by preceding dividing plate and rear bulkhead; Said 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 said; Said 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 make full use of offseting each other 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 inner, 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 said muffler body, said flange links to each other with preceding perforated pipe one end through suction tude; The center of dividing plate is provided with preceding interpolation pipe before said; N back interpolation pipe is set on the said rear bulkhead, and each back interpolation pipe is equal 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 said 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 the deficiency of above-mentioned existing technology; 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 realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of reactive muffler that is used for engineering machinery comprises flange plate, connecting tube, cylindrical shell, smoke-ejecting pipe, and interior the complying with by preceding through preceding dividing plate and rear bulkhead of said cylindrical shell is divided into chamber I, chamber II, chamber III to back time with cylindrical shell; Said 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; Said first hush pipe and second hush pipe are all axial arranged along cylindrical shell; The 3rd hush pipe is arranged with second hush pipe is vertical with first hush pipe; Said 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 arranges that connecting tube is communicated with chamber I, and smoke-ejecting pipe chamber III is communicated with; Said flange plate links to each other with chamber I through connecting tube.
Said first, second is the direct current perforated pipe with the 3rd hush 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.
Said first, second be 25% ± 5% with the punching rate of the 3rd hush pipe, said first, second be 5mm with hole diameter on the 3rd hush pipe.
Said cylindrical shell is divided into inner barrel and outer cylinder body, and two ends are through end plate closes, and quieter material is equipped with in the centre of inner barrel and outer cylinder body.
The ingress of said first hush pipe, second hush pipe and the 3rd hush pipe is all sealed through 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 make full use of the flowing space of cavity; (2) use of a plurality of chambeies and a plurality of direct current perforated pipes is flowed air-flow in each chamber with in the aperture, increased sound deadening capacity, can also effectively reduce the air-flow regenerated noise, makes silencing apparatus that good noise elimination effect arranged in full frequency band; (3) rational perforated pipe punching rate and size design and distribution scheme have increased air communication effectively and have crossed area, thereby reduced the air-flow regenerated noise.(4) first chambers can receive 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 a 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
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
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 chamber I17, chamber II18, chamber III19 with cylindrical shell 6 successively before being provided with in the said 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 through smoke evacuation base 2; Connecting tube 15 arranges that with smoke-ejecting pipe 1 square crossing spatially connecting tube 15 is communicated with chamber I17, chamber III19 respectively with smoke-ejecting pipe 1; Flange plate 7 links to each other with chamber I17 through 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, the 3rd hush pipe 3 and first hush pipe 8 and second hush pipe, 5 vertical layouts.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 is the direct current perforated pipe with the 3rd hush pipe 8,5,3, 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 is 25% ± 5% with the punching rate of the 3rd hush pipe 8,5,3, and the hole diameter of first, second and the 3rd hush pipe 8,5,3 is 5mm.
Cylindrical shell 6 is divided into inner barrel and outer cylinder body, and two ends are through end plate 14 sealing, and quieter material is equipped with in the centre of inner barrel and outer cylinder body.
The ingress of first hush pipe, second hush pipe and the 3rd hush pipe 8,5,3 is respectively through 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 get into chamber I17 through connecting tube 15, gas is got in first hush pipe 8 by the aperture on the perforated pipe, gets into chamber II18 subsequently; Gas among the chamber II18 is got in second hush pipe 5 by the aperture on the perforated pipe, gets into chamber III14 subsequently; Gas among the chamber III14 gets into 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 barrel be combined as the impedance composite noise elimination structure, can lower the basic, normal, high audio-frequency noise of engine exhaust.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present 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 need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.

Claims (5)

1. a reactive muffler that is used for engineering machinery comprises flange plate, connecting tube, cylindrical shell, smoke-ejecting pipe, and interior the complying with by preceding through preceding dividing plate and rear bulkhead of said cylindrical shell is divided into chamber I, chamber II, chamber III to back time with cylindrical shell; Said 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; Said first hush pipe and second hush pipe are all axial arranged along cylindrical shell; The 3rd hush pipe arranges with second hush pipe is vertical that with first hush pipe said connecting tube and smoke-ejecting pipe are vertically connected on the cylindrical shell, and connecting tube and smoke-ejecting pipe square crossing spatially layout; Connecting tube is communicated with chamber I, and smoke-ejecting pipe chamber III is communicated with; Said flange plate links to each other with chamber I through connecting tube.
2. the reactive muffler that is used for engineering machinery as claimed in claim 1; It is characterized in that; Said first, second is the direct current perforated pipe with the 3rd hush pipe; 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.
3. the reactive muffler that is used for engineering machinery as claimed in claim 2 is characterized in that, said first, second be 25% ± 5% with the punching rate of the 3rd hush pipe, said first, second be 5mm with hole diameter on the 3rd hush pipe.
4. the reactive muffler that is used for engineering machinery as claimed in claim 1 is characterized in that said cylindrical shell is divided into inner barrel and outer cylinder body, and two ends are through end plate closes, and quieter material is equipped with in the centre of inner barrel and outer cylinder body.
5. the reactive muffler that is used for engineering machinery as claimed in claim 1 is characterized in that, the ingress of said first hush pipe, second hush pipe and the 3rd hush pipe is all sealed through closure plate.
CN 201210106785 2012-04-12 2012-04-12 Reactive muffler for engineering machine Expired - Fee Related CN102606268B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN 201210106785 CN102606268B (en) 2012-04-12 2012-04-12 Reactive muffler for engineering machine

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CN102606268A true CN102606268A (en) 2012-07-25
CN102606268B CN102606268B (en) 2013-07-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321716A (en) * 2013-07-08 2013-09-25 山东大学 Reactive muffler structure with combination of perforated pipes and narrow-slit resonant cavities
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

Citations (12)

* Cited by examiner, † Cited by third party
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
US6241044B1 (en) * 1999-02-05 2001-06-05 Komatsu Ltd. Exhaust silencer and communicating pipe thereof
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
CN201687551U (en) * 2010-06-01 2010-12-29 安徽江淮汽车股份有限公司 Heavy truck muffler
CN201714459U (en) * 2010-05-28 2011-01-19 浙江大学 Automobile exhaust silencer
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
CN102322326A (en) * 2011-07-07 2012-01-18 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

Patent Citations (12)

* Cited by examiner, † Cited by third party
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
US6241044B1 (en) * 1999-02-05 2001-06-05 Komatsu Ltd. Exhaust silencer and communicating pipe thereof
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
CN102322326A (en) * 2011-07-07 2012-01-18 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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321716A (en) * 2013-07-08 2013-09-25 山东大学 Reactive muffler structure with combination of perforated pipes and narrow-slit resonant cavities
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

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Granted publication date: 20130717