CN106121774A - A kind of low noise combined type multi-cavity exhaust silencer - Google Patents

A kind of low noise combined type multi-cavity exhaust silencer Download PDF

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Publication number
CN106121774A
CN106121774A CN201610591809.5A CN201610591809A CN106121774A CN 106121774 A CN106121774 A CN 106121774A CN 201610591809 A CN201610591809 A CN 201610591809A CN 106121774 A CN106121774 A CN 106121774A
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CN
China
Prior art keywords
perforated pipe
cavity
dividing plate
suppressor case
exhaust silencer
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.)
Pending
Application number
CN201610591809.5A
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Chinese (zh)
Inventor
李舜酩
谭延峥
程春
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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Application filed by Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN201610591809.5A priority Critical patent/CN106121774A/en
Publication of CN106121774A publication Critical patent/CN106121774A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/04—Throttling-expansion and resonance

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention discloses a kind of low noise combined type multi-cavity exhaust silencer, including suppressor case, front perforated pipe, rear perforated pipe, the first to the 3rd dividing plate；Front perforated pipe inserts from the front end of suppressor case, and the front front end of perforated pipe welds with the front end of suppressor case, rear perforated pipe inserts from the rear end of suppressor case, and the rear rear end of perforated pipe is welded with the rear end of suppressor case, does not contacts between front perforated pipe with rear perforated pipe；Annular the first dividing plate it is provided with between front perforated pipe and suppressor case, annular second partition and the 3rd dividing plate it is provided with between rear perforated pipe and suppressor case, suppressor case is divided into four chambeies by the first to the 3rd dividing plate from front to back, the middle part being positioned at the first cavity segment at front perforated pipe is circumferentially equipped with noise elimination through hole, is positioned at the 3rd chamber at rear perforated pipe, the middle part of the 4th cavity segment is circumferentially equipped with noise elimination through hole.The present invention is directed to medium and low frequency acoustic attenuation performance preferable, sound deadening capacity is big, outlet noise is little.

Description

A kind of low noise combined type multi-cavity exhaust silencer
Technical field
The present invention relates to a kind of low noise combined type multi-cavity exhaust silencer, be specifically related to a kind of diesel engine exhaust system Low noise combined type multi-cavity exhaust silencer in system, belongs to exhaust silencer technical field.
Background technology
Acoustic filter is that one can either allow air-flow to pass through, and can effectively reduce again the device of noise transmission in pipeline.Along with Noise emission standard is increasingly strict both at home and abroad, and noise emission controls to become more and more valued in working process of diesel engine and asks Topic.Diesel engine, compared with gasoline engine, has more serious problem of noise pollution.Develop the exhaust silencer with outstanding noise reduction It it is the important means reducing diesel engine noise.And existing diesel engine exhaust muffler, in, low frequency have acoustic attenuation performance poor, The shortcomings such as volume is big, reproduced air-flow noise is big.
Summary of the invention
The technical problem to be solved is: provides a kind of low noise combined type multi-cavity exhaust silencer, overcomes In the existing exhaust silencer of diesel engine, low frequency acoustic attenuation performance is poor, volume is big, reproduced air-flow noise is big shortcoming.
The present invention solves above-mentioned technical problem by the following technical solutions:
A kind of low noise combined type multi-cavity exhaust silencer, including suppressor case, front perforated pipe, rear perforated pipe, first To the 3rd dividing plate；Described front perforated pipe inserts from the front end of suppressor case, and the front end of front perforated pipe and suppressor case Front end is welded, and rear perforated pipe inserts from the rear end of suppressor case, and the rear end weldering of the rear end of rear perforated pipe and suppressor case Connect, do not contact between front perforated pipe with rear perforated pipe；Annular the first dividing plate it is provided with between front perforated pipe and suppressor case, Being provided with annular second partition and the 3rd dividing plate between rear perforated pipe and suppressor case, the first to the 3rd dividing plate is by acoustic filter Housing is divided into four chambeies from front to back, and being positioned at the middle part of the first cavity segment at front perforated pipe, to be circumferentially equipped with noise elimination logical Hole, the middle part being positioned at the 3rd cavity segment at rear perforated pipe is circumferentially equipped with noise elimination through hole, is positioned at the 4th chamber at rear perforated pipe The middle part of part is circumferentially equipped with noise elimination through hole.
As the further scheme of the present invention, described exhaust silencer also includes flange, described flange and front perforated pipe Front end is welded, for being coupled together with exhaustor by exhaust silencer.
As the preferred version of the present invention, the noise elimination between described first dividing plate, the first dividing plate and suppressor case front end Front perforated tube portion between device housing, the first dividing plate and front perforated pipe front end constitutes the first expansion cavity of exhaust silencer；The One dividing plate, second partition, suppressor case between the first dividing plate and second partition, between the first dividing plate and second partition before Perforated tube portion and rear perforated tube portion constitute the second expansion cavity of exhaust silencer；Second partition, the 3rd dividing plate, second partition And the rear perforated tube portion between suppressor case, second partition and the 3rd dividing plate between the 3rd dividing plate constitutes exhaust silencer The 3rd resonant cavity；3rd dividing plate, suppressor case between the 3rd dividing plate and suppressor case rear end, the 3rd dividing plate with after wear Rear perforated tube portion between pipe rear end, hole constitutes the 4th expansion cavity of exhaust silencer.
As the preferred version of the present invention, described front perforated pipe is long at a length of second expansion cavity of the second expansion cavity part Degree 1/4, rear perforated pipe the second expansion cavity part a length of second expansion cavity length 1/2.
As the preferred version of the present invention, described first expansion cavity, the second expansion cavity, length l of the 4th expansion cavity can be led to Cross following formula to be calculated:
f = ( 2 n + 1 ) c 4 l ,
Wherein, f represents the first expansion cavity, the second expansion cavity, target frequency of noise elimination that the 4th expansion cavity is corresponding, c expression sound Speed, n is integer.
As the preferred version of the present invention, the length of described 3rd resonant cavity can be by resonant cavity volume divided by resonant cavity Sectional area obtains, and resonant cavity volume can be calculated by following formula:
f 0 = c 2 π G V ,
Wherein, V represents resonant cavity volume, f0Representing the resonant frequency of resonant cavity, c represents the velocity of sound,S0 Represent the sectional area of single noise elimination through hole, l0The wall thickness of perforated pipe in expression resonant cavity, d represents the diameter of single noise elimination through hole, t Represent the number of noise elimination through hole.
The present invention uses above technical scheme compared with prior art, has following technical effect that
1, low noise combined type multi-cavity exhaust silencer of the present invention, eliminates the noise for medium and low frequency exhaust noise, and sound deadening capacity is big, Outlet noise is little.
2, low noise combined type multi-cavity exhaust silencer of the present invention, exhaust back pressure is little, engine power loss is little.
3, low noise combined type multi-cavity exhaust silencer of the present invention, volume is little, easy to use, simple in construction.
4, low noise combined type multi-cavity exhaust silencer of the present invention, easy for installation, low cost of manufacture, is easy to processing and realizes Through engineering approaches, has wide application prospect.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of low noise combined type multi-cavity exhaust silencer of the present invention.
Fig. 2 is the side structure schematic diagram of low noise combined type multi-cavity exhaust silencer of the present invention.
Fig. 3 is that the sound deadening capacity of one of them embodiment of the present invention is with frequency variation curve figure.
Wherein, 1-flange, perforated pipe before 2-, 3-suppressor case, 4-the first dividing plate, perforated pipe after 5-, 6-second partition, 7-the 3rd dividing plate, the noise elimination through hole in 8-the first chamber, the noise elimination through hole in 9-the 3rd chamber, the noise elimination through hole in 10-the 4th chamber, 11-tail pipe.
Detailed description of the invention
Embodiments of the present invention are described below in detail, and the example of described embodiment is shown in the drawings, the most ad initio Represent same or similar element to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
The present invention is directed to the low frequency region within 1000Hz, eliminate the noise and resonant cavity with interfering based on expansion cavity acoustic reflection The principle of resonant silencing, works out a kind of low noise combined type multi-cavity exhaust silencer with outstanding noise reduction.
As depicted in figs. 1 and 2, low noise combined type multi-cavity exhaust silencer of the present invention includes flange 1, flange 1 with front wear Hole pipe 2 welds, and the front end of front perforated pipe 2 is welded with the front end of suppressor case 3, welds between suppressor case 3 and front perforated pipe 2 Connecing the first dividing plate 4, the rear end of suppressor case 3 is welded, between suppressor case 3 and rear perforated pipe 5 with the rear end of rear perforated pipe 5 Welding second partition 6；The 3rd dividing plate 7 is welded between second partition 6 with suppressor case 3 rear end；The rear end of suppressor case 3 with Tail pipe 11 welds；Front perforated pipe 2 is circumferentially arranged in the middle part in the first chamber the noise elimination through hole 8 in the first chamber；Rear perforated pipe 5 exists Circumferentially arrange the noise elimination through hole 9 in the 3rd chamber in the middle part in the 3rd chamber；Rear perforated pipe 5 the 4th chamber middle part circumferentially Arrange the noise elimination through hole 10 in the 4th chamber.
Suppressor case on the left of first dividing plate, the first dividing plate and the front perforated pipe on the left of the first dividing plate constitute exhausting silencer Device the first expansion cavity；First dividing plate, second partition, the suppressor case between the first dividing plate and second partition, the first dividing plate are right Rear perforated pipe on the left of the front perforated pipe of side and second partition constitutes exhaust silencer the second expansion cavity；Second partition, the 3rd every Rear perforated pipe between suppressor case and second partition and the 3rd dividing plate between plate, second partition and the 3rd dividing plate constitutes row Gas acoustic filter the 3rd resonant cavity；Suppressor case on the right side of 3rd dividing plate, the 3rd dividing plate and the rear perforated pipe on the right side of the 3rd dividing plate Constitute exhaust silencer the 4th expansion cavity.
The noise elimination through hole 8 in the first chamber is positioned at the middle part of the first expansion cavity；The noise elimination through hole 9 in the 3rd chamber is positioned at the 3rd resonant cavity Middle part；The noise elimination through hole 10 in the 4th chamber is positioned at the middle part of the 4th expansion cavity.
The operation principle of the present invention is: in expansion cavity, when wave length of sound is much larger than acoustic filter each several part size, and pipe Interior air column moves as piston, different pipes and expansion chambers combination, is equivalent to different acoustic mass and the combination of acoustic compliance, Suitable combination prevents from the noise of some frequency and passes through acoustic filter, thus reaches noise elimination purpose.In resonant cavity, work as sound When wave loops is to the noise elimination lead to the hole site of perforated pipe, owing to acoustic impedance suddenlys change, a part of acoustic reflection goes back, and a part of sound wave enters Enter to eliminate the noise in through hole and resonant cavity.When frequency of sound wave and resonant cavity resonant frequency close to time, air is on noise elimination through hole wall Constantly vibrate friction, under the effect of viscous damping and heat conduction, constantly consume acoustic wave energy, reach noise elimination purpose.
To expansion cavity, it is S in cross section1Pipeline in insert a segment length be l, cross section be S2Pipeline (expansion chambers), i.e. structure Becoming simplest single-unit Extonsion Group, its sound intensity transmission coefficient is:
τ = 4 4 cos 2 ( k l ) + ( S 2 / S 1 + S 1 / S 2 ) 2 sin 2 ( k l ) = I 2 I 1 - - - ( 1 )
Wherein, k is wave number, and k=2 π/λ, λ is wave length of sound；I1And I2It is respectively by the sound intensity before and after expansion chambers.In It is that sound deadening capacity is:
Δ L = 10 * lg I 1 I 2 = 10 * lg [ 1 + 1 4 ( m - 1 m ) 2 sin 2 ( k l ) ] - - - ( 2 )
Represent divergence ratio, it can be seen that as kl=n π, i.e.Time (n=0,1,2 ...), sin2(kl) =0, sound deadening capacity Δ L=0, show that sound wave can be undampedly by acoustic filter, and this is that the main of single-unit Extonsion Group lacks Point.Now, corresponding frequency referred to as acoustic filter pass through frequency:
f m i n = n 2 π c - - - ( 3 )
WhenTime, sin2(kl)=1, sound deadening capacity is maximum, can derive corresponding frequencies during sound deadening capacity maximum For:
f m a x = ( 2 n + 1 ) c 4 l - - - ( 4 )
Inlet tube and the outlet of expansion are inserted in suppressor case, by theory analysis by method respectively that utilize inner connecting tube Understand, the expansion cavity to a length of L, be equal to when inserting length of tubeTime, can in cancelling (3) n be odd number pass through frequency.When Insertion length of tube is equal toTime, can in cancelling (4) n be even number by frequency, the two combines, available ideal disappearing Sound effective value.
To resonant cavity, determine that the resonant frequency of resonant cavity is most important.Take single resonant cavity, be provided with t noise elimination through hole, that The resonant frequency f of resonant cavity0Can be expressed as:
f 0 = c 2 π G V - - - ( 5 )
Wherein, V represents resonant cavity volume, obtains the length of resonant cavity, c expression sound divided by the sectional area of resonant cavity with volume Speed, G is conductivity, and expression formula is as follows:
G = tS 0 l 0 + π d / 4 - - - ( 6 )
Wherein, S0Represent the sectional area of single noise elimination through hole, l0The wall thickness of perforated pipe in expression resonant cavity, d represents single and disappears The diameter of sound through hole.
From formula (5) and formula (6): resonant cavity volume is the least, noise elimination through hole sectional area is the biggest, then the resonance frequency of resonant cavity Rate is the biggest.
The pure tone sound deadening capacity (transmission loss) that frequency is f is by single resonant cavity:
T L = 10 * lg ( 1 + G V 4 S 2 ( f / f 0 - f 0 / f ) 2 ) - - - ( 7 )
Wherein, S is that perforated pipe inner wall section amasss.From formula (7): resonant cavity volume is the biggest, noise elimination through hole sectional area more Greatly, then the sound deadening capacity of resonant cavity is the biggest.
Therefore, by rationally selecting the individual of the number of noise elimination through hole, single hole sectional area, resonant cavity volume and resonant cavity Number, so that acoustic filter has enough sound deadening capacities in broad frequency band, reaches noise elimination purpose.Consider size limitation, to expansion Open chamber, expansion cavity length dimension can be calculated according to target frequency of noise elimination and formula (4)；To resonant cavity, according to formula (5) and formula (6) resonant cavity length size can be calculated.
Below by way of finite element simulation and the soundproof effect of test explanation low noise combined type multi-cavity exhaust silencer.Pass through Noise measurement is tested, and records within the energy of certain diesel exhaust noise is mainly distributed on 2000Hz, within particularly 1000Hz Energy is concentrated the most.The present embodiment designed accordingly, front perforated pipe internal diameter is 50.5mm, and wall thickness is 1mm；Rear perforated pipe internal diameter is 42mm, wall thickness is 1mm；Suppressor case internal diameter is 97mm, wall thickness 1.5mm；There are 12 row totally 228 noise elimination through holes, hole in first chamber Footpath is 4mm；There are 3 row totally 45 noise elimination through holes in 3rd chamber, and aperture is 4mm；There are 10 row totally 190 noise elimination through holes, aperture in 4th chamber For 4mm；Each cavity length size is respectively 103mm, 187mm, 50mm, 102mm, and front perforated pipe is in the length of the second expansion cavity part Be the 1/4 of the second expansion cavity length, rear perforated pipe the second expansion cavity part a length of second expansion cavity length 1/2；Respectively Chamber dividing plate wall thickness is 1mm.
By simulation calculation, obtain the transmission loss of the present embodiment.From figure 3, it can be seen that the present embodiment 1130Hz, There is formant in 1820Hz, 2100Hz, 3310Hz, 3920Hz, transmission loss substantially, within 2400Hz medium and low frequency and 3300Hz with On high frequency acoustic attenuation performance preferable, up to 93dB, reached noise elimination purpose.
It is installed to this diesel engine on certain type tractor corresponding form perfect Agricultural Machinery Design, carries out multi-state Actual measurement.The present embodiment, in the fixation noise testing of tractor, at distance exhaust silencer air exit 10cm, is starting Under machine maximum speed and conventional severe gear, compared with original acoustic filter, the sound pressure level recorded reduces 6dB (A).Do not changing Under the conditions of other noise radiations of tractor, according to country's testing standard, record only by exhaust silencer outlet sound pressure level reduction Contribution, the other sound pressure level of the driver's ear caused reduces, and by originally becoming lower than GB 2dB (A) higher than GB, significantly reduces Noise also improves crew comfort.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within scope Within.

Claims (6)

1. a low noise combined type multi-cavity exhaust silencer, it is characterised in that include suppressor case, front perforated pipe, after wear Kong Guan, the first to the 3rd dividing plate；Described front perforated pipe inserts from the front end of suppressor case, and the front end of front perforated pipe and noise elimination The front end welding of device housing, rear perforated pipe inserts from the rear end of suppressor case, and the rear end of rear perforated pipe and suppressor case Rear end welding, do not contact between front perforated pipe with rear perforated pipe；It is provided with annular between front perforated pipe and suppressor case First dividing plate, is provided with annular second partition and the 3rd dividing plate between rear perforated pipe and suppressor case, first to the 3rd every Suppressor case is divided into four chambeies by plate from front to back, is positioned at the middle part of the first cavity segment circumferentially at front perforated pipe Being equipped with noise elimination through hole, the middle part being positioned at the 3rd cavity segment at rear perforated pipe is circumferentially equipped with noise elimination through hole, at rear perforated pipe The middle part being positioned at the 4th cavity segment is circumferentially equipped with noise elimination through hole.
Low noise combined type multi-cavity exhaust silencer the most according to claim 1, it is characterised in that described exhaust silencer is also Including flange, described flange welds with the front end of front perforated pipe, for being coupled together with exhaustor by exhaust silencer.
Low noise combined type multi-cavity exhaust silencer the most according to claim 2, it is characterised in that described first dividing plate, The front perforated pipe portion between suppressor case, the first dividing plate and front perforated pipe front end between one dividing plate and suppressor case front end Divide the first expansion cavity of composition exhaust silencer；First dividing plate, second partition, acoustic filter between the first dividing plate and second partition Housing, front perforated tube portion between the first dividing plate and second partition and rear perforated tube portion constitute the second expansion of exhaust silencer Open chamber；Second partition, the 3rd dividing plate, suppressor case, second partition and the 3rd dividing plate between second partition and the 3rd dividing plate Between rear perforated tube portion constitute exhaust silencer the 3rd resonant cavity；After 3rd dividing plate, the 3rd dividing plate and suppressor case Rear perforated tube portion between suppressor case, the 3rd dividing plate and rear perforated pipe rear end between end constitutes the of exhaust silencer Four expansion cavities.
Low noise combined type multi-cavity exhaust silencer the most according to claim 3, it is characterised in that described front perforated pipe is The 1/4 of a length of second expansion cavity length of two expansion cavity parts, rear perforated pipe is a length of the second of the second expansion cavity part The 1/2 of expansion cavity length.
Low noise combined type multi-cavity exhaust silencer the most according to claim 3, it is characterised in that described first expansion cavity, Second expansion cavity, length l of the 4th expansion cavity can be calculated by following formula:
f = ( 2 n + 1 ) c 4 l ,
Wherein, f represents the first expansion cavity, the second expansion cavity, target frequency of noise elimination that the 4th expansion cavity is corresponding, and c represents the velocity of sound, n For integer.
Low noise combined type multi-cavity exhaust silencer the most according to claim 3, it is characterised in that described 3rd resonant cavity Length can be obtained divided by the sectional area of resonant cavity by resonant cavity volume, and resonant cavity volume can be calculated by following formula:
f 0 = c 2 π G V ,
Wherein, V represents resonant cavity volume, f0Representing the resonant frequency of resonant cavity, c represents the velocity of sound,S0Represent single The sectional area of individual noise elimination through hole, l0Representing the wall thickness of perforated pipe in resonant cavity, d represents the diameter of single noise elimination through hole, and t represents and disappears The number of sound through hole.
CN201610591809.5A 2016-07-25 2016-07-25 A kind of low noise combined type multi-cavity exhaust silencer Pending CN106121774A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106894925A (en) * 2017-01-10 2017-06-27 同济大学 A kind of multi-cavity combination perforation silencer for eliminating vehicle Charge air inlet broadband noise
CN107587960A (en) * 2017-09-22 2018-01-16 杭叉集团股份有限公司 Intake muffler and diesel fork lift truck
CN107701264A (en) * 2017-11-25 2018-02-16 华东交通大学 A kind of integral exhaust purifying muffler for being used to improve sound quality
CN108470561A (en) * 2018-04-28 2018-08-31 力帆实业(集团)股份有限公司 A kind of full range impedance composite muffler
CN108979799A (en) * 2018-07-16 2018-12-11 山东艾泰克环保科技股份有限公司 A kind of harvest machinery fire extinguishing star silencer
CN110030060A (en) * 2017-12-27 2019-07-19 本田技研工业株式会社 Exhaust silencer structure for vehicle
CN113153492A (en) * 2021-04-20 2021-07-23 潘泉方 Silencer for air inlet and outlet of large and medium-sized air compressors or internal combustion engines or engines
CN113838447A (en) * 2021-09-08 2021-12-24 青岛海尔空调器有限总公司 Control method and system of silencer

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6158546A (en) * 1999-06-25 2000-12-12 Tenneco Automotive Inc. Straight through muffler with conically-ended output passage
CN2523957Y (en) * 2001-08-30 2002-12-04 中国一拖集团有限公司 Four chamber exhaust silencer of engine
CN2646393Y (en) * 2003-08-27 2004-10-06 洛阳西苑车辆与动力检验所有限公司 Four-chamber impedance composite type exhaust muffler of engine
CN1626780A (en) * 2003-12-12 2005-06-15 丰田自动车株式会社 Exhaust muffling device
CN201241746Y (en) * 2008-08-21 2009-05-20 安徽江淮汽车股份有限公司 Electric impedance silencer for light truck
CN102392717A (en) * 2011-10-25 2012-03-28 湛江市华夏***有限公司 Automobile silencer with five chambers
CN202431338U (en) * 2011-12-31 2012-09-12 杭州银轮科技有限公司 Catalytic conversion muffler of diesel engine
CN203035323U (en) * 2013-01-04 2013-07-03 飞鹿电器(福建)有限公司 Five-cavity muffler of mute generator unit
CN203847218U (en) * 2013-12-31 2014-09-24 三河市科达科技有限公司 High-power tractor silencer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6158546A (en) * 1999-06-25 2000-12-12 Tenneco Automotive Inc. Straight through muffler with conically-ended output passage
CN2523957Y (en) * 2001-08-30 2002-12-04 中国一拖集团有限公司 Four chamber exhaust silencer of engine
CN2646393Y (en) * 2003-08-27 2004-10-06 洛阳西苑车辆与动力检验所有限公司 Four-chamber impedance composite type exhaust muffler of engine
CN1626780A (en) * 2003-12-12 2005-06-15 丰田自动车株式会社 Exhaust muffling device
CN201241746Y (en) * 2008-08-21 2009-05-20 安徽江淮汽车股份有限公司 Electric impedance silencer for light truck
CN102392717A (en) * 2011-10-25 2012-03-28 湛江市华夏***有限公司 Automobile silencer with five chambers
CN202431338U (en) * 2011-12-31 2012-09-12 杭州银轮科技有限公司 Catalytic conversion muffler of diesel engine
CN203035323U (en) * 2013-01-04 2013-07-03 飞鹿电器(福建)有限公司 Five-cavity muffler of mute generator unit
CN203847218U (en) * 2013-12-31 2014-09-24 三河市科达科技有限公司 High-power tractor silencer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106894925A (en) * 2017-01-10 2017-06-27 同济大学 A kind of multi-cavity combination perforation silencer for eliminating vehicle Charge air inlet broadband noise
CN107587960A (en) * 2017-09-22 2018-01-16 杭叉集团股份有限公司 Intake muffler and diesel fork lift truck
CN107701264A (en) * 2017-11-25 2018-02-16 华东交通大学 A kind of integral exhaust purifying muffler for being used to improve sound quality
CN107701264B (en) * 2017-11-25 2023-12-19 华东交通大学 Integrated exhaust purification muffler for improving sound quality
CN110030060A (en) * 2017-12-27 2019-07-19 本田技研工业株式会社 Exhaust silencer structure for vehicle
CN110030060B (en) * 2017-12-27 2021-06-01 本田技研工业株式会社 Exhaust muffler structure for vehicle
CN108470561A (en) * 2018-04-28 2018-08-31 力帆实业(集团)股份有限公司 A kind of full range impedance composite muffler
CN108979799A (en) * 2018-07-16 2018-12-11 山东艾泰克环保科技股份有限公司 A kind of harvest machinery fire extinguishing star silencer
CN113153492A (en) * 2021-04-20 2021-07-23 潘泉方 Silencer for air inlet and outlet of large and medium-sized air compressors or internal combustion engines or engines
CN113838447A (en) * 2021-09-08 2021-12-24 青岛海尔空调器有限总公司 Control method and system of silencer

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Application publication date: 20161116