CN106468198B - Silencer and engineering machinery - Google Patents
Silencer and engineering machinery Download PDFInfo
- Publication number
- CN106468198B CN106468198B CN201610289625.3A CN201610289625A CN106468198B CN 106468198 B CN106468198 B CN 106468198B CN 201610289625 A CN201610289625 A CN 201610289625A CN 106468198 B CN106468198 B CN 106468198B
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- Prior art keywords
- noise elimination
- elimination cavity
- pipe
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- chamber
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Classifications
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- 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
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- 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
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- 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
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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)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention relates to a kind of silencer and engineering machinery, wherein silencer includes shell, shell is between air inlet pipe and an air outlet pipe and communicates therewith, the noise elimination cavity of multiple connections is equipped in shell, noise elimination cavity includes the first noise elimination cavity, first noise elimination cavity has at least two sub- chambers with air inlet pipe serial communication, and at least two sub- chambers include the second sub- chamber positioned at the first sub- chamber of airintake direction most downstream and positioned at airintake direction most upstream, and the first sub- chamber is only connected with sub- chamber adjacent thereto.Except being eliminated the noise in silencer of the invention except through multiple noise elimination cavities, it is in addition additionally arranged at least two sub- chambers again, at least two sub- chambers are formed by noise elimination route as collateral branch's noise elimination route, at least two-stage noise elimination is carried out in the same noise elimination cavity, the noise that at least two different frequencies can be cut down, substantially improves noise elimination effect.
Description
Technical field
The present invention relates to technical field of engineering machinery more particularly to a kind of silencer and engineering machinery.
Background technique
Exhaust noise is one of Main Noise Sources of engineering machinery, and silencer is filled as the main noise elimination of vehicle exhaust system
It sets, performance quality decides the noise level of vehicle.In recent years, increasingly strict with legislations for noise, silencer is set
Meter requires also to be gradually increased, while engine speed gradually shows the feature of the slow-speed of revolution, so as to cause exhaust fundamental frequency and its again
Frequency shows the feature of low frequency.Engineering machinery exhaust noise is the broadband noise based on middle low frequency, therefore it is required that silencer
There are excellent middle low-frequency range acoustic characteristics on the basis of taking into account full frequency band and eliminating the noise.
The design of existing engineering machinery silencer is mostly no to be directed to the higher crest frequency of respective host exhaust noise,
Experience structure is generallyd use, or even a acoustic wave filter structure is used for multiple vehicles, is directed to respective host due to being designed without
The higher crest frequency of exhaust noise, noise elimination effect is bad after causing to be attached on vehicle or even certain biggish frequency ranges of noise produce
Life passes through frequency.
In addition, due in engineering machinery piggyback pod space it is limited, the volume of silencer is usually smaller, so silencer is most
Exhaust noise is reduced using perforation enlargement of pipe and the method for shrinking some labyrinths such as unit, filling sound-absorbing material, it is complicated
Internal structure causes exhaust back pressure larger, therefore causes biggish energy loss.
Summary of the invention
The purpose of the present invention is to propose to a kind of silencer and engineering machinery, to solve silencer noise elimination effect in the prior art
The bad problem of fruit.
It to achieve the above object, include shell the present invention provides a kind of silencer, the shell is located at air inlet pipe and goes out
It between tracheae and communicating therewith, the noise elimination cavity of multiple connections is equipped in the shell, the noise elimination cavity includes the first noise elimination cavity,
First noise elimination cavity has at least two sub- chambers with the air inlet pipe serial communication, and at least two sub- chamber includes being located at
The sub- chamber of the first of airintake direction most downstream and the second sub- chamber positioned at airintake direction most upstream, the first sub- chamber only and with its phase
Adjacent sub- chamber is connected.
Further, the air inlet pipe extends through first noise elimination cavity, and the first sub- chamber and the second sub- chamber are located at
Between the air inlet pipe and the shell, the second sub- chamber is communicated with the air inlet pipe；Or the gas outlet of the air inlet pipe
In first noise elimination cavity.
Further, at least two sub- chambers are along the radial arrangement of the shell or along the axial cloth of the shell
It sets.
Further, first noise elimination cavity is located at inlet end or the middle position of the shell.
Further, the first axially extending pipe, the first sub- chamber position are equipped between the air inlet pipe and the shell
Between first pipe and the shell.
Further, radial partition is equipped in first noise elimination cavity, for first noise elimination cavity to be divided into axial direction
At least two sub- chambers of arrangement.
Further, multiple noise elimination cavities include third noise elimination cavity and the 4th noise elimination cavity, are set in the third noise elimination cavity
There is the second pipe, second pipe is equipped with multiple holes, and the air inlet of second pipe is pierced by the third noise elimination cavity, second pipe
Gas outlet be equipped with third pipe, the gas outlet of the third pipe is pierced by the third noise elimination cavity and extends to the 4th noise elimination cavity
In, the diameter of the third pipe is less than the diameter of second pipe.
Further, the second noise elimination cavity, the air inlet pipe are equipped between first noise elimination cavity and the third noise elimination cavity
Gas outlet and the air inlet of second pipe protrude into second noise elimination cavity.
Further, the length that the air inlet pipe protrudes into second noise elimination cavity accounts for the 1/3 of the second noise elimination cavity length,
And/or second pipe protrudes into the length of second noise elimination cavity and accounts for the 1/4 of the second noise elimination cavity length.
Further, the air inlet pipe mutually staggers in the axial direction with second pipe.
Further, the 4th noise elimination cavity is located at the outlet side of the shell, and the escape pipe disappears through the described 4th
The operatic tunes, and the air inlet of the escape pipe protrudes into the third noise elimination cavity.
To achieve the above object, the present invention also provides a kind of engineering machinery, including above-mentioned silencer.
Based on the above-mentioned technical proposal, the present invention in the first noise elimination cavity by being arranged at least two and air inlet pipe serial communication
Sub- chamber, and the first sub- chamber positioned at airintake direction most downstream is only connected with sub- chamber adjacent thereto, it means that
Except being eliminated the noise in silencer of the invention except through multiple noise elimination cavities, and at least two sub- chambers are in addition additionally arranged, at least
Two sub- chambers are formed by noise elimination route as collateral branch's noise elimination route, and at least two-stage noise elimination, energy are carried out in the same noise elimination cavity
The noise for enough cutting down at least two different frequencies, substantially improves noise elimination effect.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is cross-sectional view of the silencer one embodiment of the present invention along central axes.
Fig. 2 is the schematic diagram of internal structure of silencer one embodiment of the present invention.
Fig. 3 is cross-sectional view of another embodiment of silencer of the present invention along central axes.
Fig. 4 is the mounting structure schematic diagram of silencer one embodiment of the present invention.
In figure: 1- air inlet pipe, 2- the 4th manage, 3- first partition, 4- shell, 5- second partition, 6- second manage, 7- third every
Plate, 8- third pipe, 9- escape pipe, 10- first are managed, and 11- the 5th is managed, the first noise elimination cavity of 12-, the second noise elimination cavity of 13-, 14- third
Noise elimination cavity, the 4th noise elimination cavity of 15-, 16- radial direction partition, 17- mounting base, the sub- chamber of 21- first, the sub- chamber of 22- second.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
The limitation of the scope of the present invention.
In order to improve the noise elimination effect of silencer, the present invention proposes a kind of improved silencer of structure, as shown in Figure 1, should
Silencer includes shell 4, and the shell 4 is between air inlet pipe 1 and escape pipe 9, and the first end and air inlet of the shell 4
Pipe 1 is connected to, and the second end of the shell 4 is connected to escape pipe 9, the noise elimination cavity equipped with multiple connections in the shell 4, and at least one
A noise elimination cavity is connected to the air inlet pipe 1 or the escape pipe 9, so that exhaust enters silencer by air inlet pipe 1, through disappearing
After each noise elimination cavity in sound device is eliminated the noise, it is discharged by escape pipe 9.
Multiple noise elimination cavities in above-mentioned silencer include the first noise elimination cavity 12, first noise elimination cavity 12 have with it is described into
At least two sub- chambers of 1 serial communication of tracheae, at least two sub- chamber include the first sub- chamber positioned at airintake direction most downstream
21 and the second sub- chamber 22 positioned at airintake direction most upstream, the first sub- chamber 21 be serially connected and be connected to the second sub- chamber 22, second son
Chamber 22 and air inlet pipe 1 are in fluid communication, and the first sub- chamber 21 is only connected with sub- chamber adjacent thereto, in other words, the first son
Chamber 21 is not connected to other sub- chambers in other noise elimination cavities or the first noise elimination cavity, only the sub- chamber adjacent with the first sub- chamber 21 with
First sub- chamber 21 is connected to, and certainly, connection herein refers to directly being connected to.As shown in Figure 1, there are two being set in the first noise elimination cavity 12
Sub- chamber, the respectively first sub- chamber 21 and the second sub- chamber 22 are provided only with the 5th pipe 11 being connected to the first sub- chamber on first sub- chamber 21,
And the first sub- chamber 21 is only connected to the second sub- chamber 22.
By the way that the sub- chamber of at least two with air inlet pipe serial communication are arranged in the first noise elimination cavity, and to be located at air inlet
The sub- chamber 21 of the first of direction most downstream is only connected with sub- chamber adjacent thereto, it means that in addition to logical in silencer of the invention
It crosses except multiple noise elimination cavities are eliminated the noise, and is in addition additionally arranged at least two sub- chambers, at least two sub- chambers are formed by noise elimination road
Line carries out at least two-stage noise elimination in the same noise elimination cavity, can cut down at least two different frequencies as collateral branch's noise elimination route
Noise, substantially improve noise elimination effect.
It should be noted that silencer of the present invention is equipped with multiple noise elimination cavities, can be set in wherein any one noise elimination cavity
The sub- chamber of above-mentioned at least two is set, as long as can be realized above-mentioned effect.In embodiment as shown in Figure 1, however it is not limited to
At least two sub- chambers are set in first noise elimination cavity 12, can also be equally arranged in other noise elimination cavities, setting at least two
The purpose of sub- chamber mainly it is original eliminated the noise by multiple noise elimination cavities on the basis of be further added by least one collateral branch's noise elimination road
Line can cut down the noise of more multi-frequency in this way.
In a preferred embodiment, the first noise elimination cavity 12 is located at inlet end or the middle position of the shell 4.
Have in multiple noise elimination cavities of silencer it is some be directly connected to air inlet pipe 1, such as air inlet pipe 1 pass through the noise elimination cavity,
Or the outlet end of air inlet pipe 1 is located inside the noise elimination cavity；And in addition do not connect directly with air inlet pipe 1 then there are also some noise elimination cavities
It is logical, but be connected to indirectly with air inlet pipe 1 by the connection between noise elimination cavity and noise elimination cavity, therefore at least two sub- chambers and air inlet
Pipe 1 is also possible to not be connected to directly.
It is located at the second of airintake direction most upstream in at least two set sub- chambers at least one noise elimination cavity
The mode that sub- chamber 22 is connected to air inlet pipe 1 at least there are two types of: one is the air inlet pipe 1 to extend through first noise elimination cavity
12, the first sub- chamber 21 and the second sub- chamber 22 between the air inlet pipe 1 and the shell 4, the second sub- chamber 22 with
The air inlet pipe 1 communicates；Another kind is that the gas outlet of the air inlet pipe 1 is located in first noise elimination cavity 12, at this time air inlet pipe 1
It is directly connected to the second sub- chamber 22, no setting is required the 4th pipe 2.
For first way, the second sub- chamber 22 can the 4th pipe 2 on the side wall by the way that the air inlet pipe 1 is arranged in
The air inlet pipe 1 is connected to.Here the number of the 4th set pipe 2 can be one, or it is multiple, it specifically can basis
Actual conditions are selected.
4th pipe 2 is set on the side wall of air inlet pipe 1, to be connected to the second sub- chamber 22 and air inlet pipe 1, such first noise elimination cavity
12 are formed the resonant silencing chamber of at least two-stage, when sound wave incident, on resonant frequency, into the second sub- chamber 22 and the first son
The sound wave of chamber 21 generates violent resonant interaction in the 4th pipe 2 and the 5th pipe 11, and sound energy has been lost, thus abatement at least two
The noise of frequency range.
The arrangement form of chamber at least two, can be along the radial direction arrangement of the shell 4；It can also be along the shell
4 axial arrangement.
As shown in Fig. 2, the first axially extending pipe 10 is equipped between the air inlet pipe 1 and the shell 4, first son
Chamber 21 is between first pipe 10 and the shell 4.The outer wall and the shell of the air inlet pipe 1 is arranged in first pipe 10
Between the inner wall of body 4, first noise elimination cavity 12 is divided into the first sub- chamber 21 and the second sub- chamber 22, the first sub- chamber 21
It is sequentially connected in series with the described second sub- chamber 22 along the radial direction of the shell 4, wherein in radial directions, the first sub- chamber 21 is located at
Outside, the second sub- chamber 22 are located inside.
As shown in figure 3, radial partition 16 is equipped in first noise elimination cavity 12, for separating first noise elimination cavity 12
For at least two sub- chambers axially arranged.First noise elimination cavity 12 is divided into the first sub- chamber 21 and the by the radial direction partition 16
Two sub- chambers 22, the first sub- chamber 21 and the second sub- chamber 22 are sequentially connected in series along the axial direction of the shell 4, wherein
On axial direction, the second sub- chamber 22 is relative to the first sub- chamber 21 closer to the first end of shell 4.
In two embodiments as shown in Figures 2 and 3, the air inlet pipe 1 run through first noise elimination cavity 12, it is described into
Tracheae 1 is connected to the described first sub- chamber 21 by the 4th pipe 2, the tube wall of first pipe 10 or the radial partition 16
It is equipped with the 5th pipe 11, the 5th pipe 11 is for being connected to the described first sub- chamber 21 and the second sub- chamber 22.In this way, first disappears
At least two-stage resonant cavity is formd in the operatic tunes 12, by being used in series for two-stage resonant cavity, damages the transmitting of the first noise elimination cavity 12
Loss of production gives birth at least two resonance peaks, by adjusting number, the length and diameter of the 4th pipe 2 and the 5th pipe 11, adjustable two
The frequency of a resonance peak, is at exhaust noise peak value, generally can choose at engine exhaust fundamental frequency and its frequency multiplication.
Other than the first above-mentioned noise elimination cavity 12, multiple noise elimination cavities can also include third noise elimination cavity 14 and the 4th
Noise elimination cavity 15, the third noise elimination cavity 14 is interior to be equipped with the second pipe 6, wherein the number of the second pipe 6 can carry out according to the actual situation
Flexible setting, multiple second pipes 6 are parallel with one another, such as in the embodiment shown in Figure 2, and there are three the settings of the second pipe 6, and this
Three the second pipes 6 are evenly arranged in a circumferential direction.
The tube wall of second pipe 6 is equipped with multiple holes, wherein the punching rate of second pipe 6 can for 20%~
25%, the diameter in each hole can choose 4mm~6mm on second pipe 6.Expand in this way, third noise elimination cavity 14 forms perforated tube
Noise elimination cavity is opened, is eliminated the noise by each perforation on the second pipe 6.Number, arrangement form and second by adjusting the second pipe 6
The deadening frequency band and sound deadening capacity of the adjustable third noise elimination cavity 14 of the number in hole on pipe 6.
The air inlet of second pipe 6 is pierced by the third noise elimination cavity 14, and the outlet side of second pipe 6 is connected with third
Pipe 8, the gas outlet of the third pipe 8 are pierced by the third noise elimination cavity 14 and extend in the 4th noise elimination cavity 15, and described
The diameter of three pipes 8 is less than the diameter of second pipe 6.In this way, exhaust a part into the second pipe 6 is discharged by third pipe 8
Or enter in the 4th noise elimination cavity 15, by the resonant interaction of the 4th noise elimination cavity 15, a part of sound energy can be lost, enhancing is eliminated the noise
Effect.
On the basis of the above embodiments, can also be arranged between first noise elimination cavity 12 and the third noise elimination cavity 14
The air inlet of at least one second noise elimination cavity 13, the gas outlet of the air inlet pipe 1 and second pipe 6 protrudes into described second and disappears
The diameter of the operatic tunes 13, the diameter of the air inlet pipe 1 and second pipe 6 is respectively less than the diameter of second noise elimination cavity 13.Second
Noise elimination cavity 13 is expanding noise elimination cavity, and by sound wave, in circulation, the mutation of sectional area occurs to reflect noise of decaying, and reaches and disappears
The purpose of sound.By adjusting the main deadening frequency band of the adjustable chamber of length of the second noise elimination cavity 13, by adjusting air inlet pipe 1
What the length for protruding into the second noise elimination cavity 13 with the second pipe 6 can eliminate the second noise elimination cavity 13 passes through frequency.
Preferably, the length that the air inlet pipe 1 protrudes into second noise elimination cavity 13 accounts for 13 total length of the second noise elimination cavity
1/3 and/or second pipe 6 protrude into the length of second noise elimination cavity 13 and account for the 1/ of 13 total length of the second noise elimination cavity
4, what which can preferably eliminate the second noise elimination cavity 13 passes through frequency.
In order to expand air-flow sufficiently, air-flow is prevented to be directly entered second pipe 6, institute after the air inlet pipe 1 outflow
Air inlet pipe 1 is stated to mutually stagger on axial position with second pipe 6.
Further to improve noise elimination effect, the 4th noise elimination cavity 15 is located at the outlet side of the shell 4, third pipe 8
Gas outlet can be protruded into inside the 4th noise elimination cavity 15, and the escape pipe 9 runs through the 4th noise elimination cavity 15, the escape pipe 9
Air inlet protrudes into the third noise elimination cavity 14.In this way, exhaust enters the 4th noise elimination cavity 15 by third pipe 8, then return again to
Third noise elimination cavity 14 is eliminated the noise.Multiple third pipes 8 and the 4th noise elimination cavity 15 constitute parallel resonant silencing chamber, can produce one
Peak value is lost in a transmitting, by adjusting the frequency of the adjustable peak value of diameter and length of third pipe 8, to reinforce silencer
Whole noise elimination effect can also eliminate the noise at other exhaust peak values.
Silencer in various embodiments of the present invention is suitably applied in all kinds of engineering machinery or vehicle, to reduce all kinds of engineerings
Noise caused by being vented in mechanical or vehicle.
When specific installation, silencer can be mounted in engineering machinery using mounting base 17 as shown in Figure 4 can be with
The interconnected position of exhaust, the mounting base 17 include support portion and mounting plate, mounting hole can be set on mounting plate, to pass through
Bolt is removably mounted on the corresponding position of engineering machinery, and support portion is then directly fixedly connected with the first end of silencer, can
It can be connected by the gap between two support portions with the exhaust pipe of engine with connection types, air inlet pipe 1 such as selection welding.
The installation holder structure is simple, easy for installation, high reliablity.
The specific structure that 1~3 pair of silencer of the present invention and engineering machinery implement example with reference to the accompanying drawing is illustrated:
As shown in Figures 2 and 3, silencer is divided into four by shell 4, first partition 3, second partition 5, third partition 7 and disappears
Acoustic chamber, respectively the first noise elimination cavity 12, the second noise elimination cavity 13, third noise elimination cavity 14 and the 4th noise elimination cavity 15.Suppressor case 4
Both ends be connected separately with air inlet pipe 1 and escape pipe 9.
Air inlet pipe 1 passes through the first noise elimination cavity 12, and protrudes into the second noise elimination cavity 13, and three are provided in third noise elimination cavity 14
Second pipe 6, so that third noise elimination cavity 14 is communicated with the second noise elimination cavity 13, in the welding position of every second pipe 6 on third partition 7
It is provided with third pipe 8, third noise elimination cavity 14 is connected to by third pipe 8 with the 4th noise elimination cavity 15, and escape pipe 9 runs through the 4th noise elimination cavity
15, and be connected to third noise elimination cavity 14.
In embodiment as shown in Figure 2, the first noise elimination cavity 12 is separated into the first sub- chamber 21 and the second sub- chamber by the first pipe 10
22, it is provided at least one the 4th pipe 2 on the side wall of air inlet pipe 1, multiple 5th pipes are provided on the side wall of the first pipe 10
11, tandem resonant cavity is formed by the 4th pipe 2 and the 5th pipe 11 between the first sub- chamber 21 and the second sub- chamber 22 and air inlet pipe 1.
In embodiment as shown in Figure 3, the first noise elimination cavity 12 is separated into the first sub- chamber 21 and the second son by radial partition 16
Chamber 22 is provided with multiple 5th pipes 11 on radial partition 16, by the between the first sub- chamber 21 and the second sub- chamber 22 and air inlet pipe 1
Four pipes 2 and the 5th pipe 11 form tandem resonant cavity.
When silencer works, air-flow enters from air inlet pipe 1, and a part of air-flow enters the first noise elimination cavity 12 by the 4th pipe 2,
By returning to air inlet pipe 1 after two-stage resonant silencing；Another part air-flow is directly entered the second noise elimination cavity 13, by expansion and shrinks
Enter the second pipe 6 after noise elimination；Enter third after eliminating the noise into air-flow a part in the second pipe 6 by the aperture on the second pipe 6
Noise elimination cavity 14 is discharged after eliminating the noise using expansion with contraction by escape pipe 9；Into another part air-flow warp in the second pipe 6
It crosses third pipe 8 and enters the 4th noise elimination cavity 15, return to the second pipe 6 by resonant silencing, third noise elimination cavity is then entered by aperture
14, it again passes by after expansion is eliminated the noise with contraction and is discharged by escape pipe 9.
Pass through the explanation to silencer of the present invention and multiple embodiments of engineering machinery, it can be seen that silencer of the present invention and
Engineering machinery, which implements example, at least has the advantages that one or more of:
1, by the combination of various forms of resonon chambers and expansion cavity, exhaust airstream is made to pass through multiple resonant silencing and expansion
With shrink noise elimination after be discharged, for the larger exhaust fundamental frequency of engineering machinery exhaust noise spectrum signature, especially noise peak and
Low-frequency range realizes preferable noise elimination effect in frequency multiplication etc., reduces the radiated noise of vehicle；
2, by reasonable each chamber parameter setting, the frequency of noise elimination range of silencer has been widened, sound deadening capacity is increased；
3, the Parallel Design of the series connection of multistage sub- chamber and a plurality of noise elimination route, compensates for the low cutoff of existing silencer
The problem of frequency, improves the transmitting loss of low-frequency range, noise elimination peak value can be generated at multiple frequencies, greatly reduces exhaust
Noise at fundamental frequency and its frequency multiplication；
4, structurally reasonable, airflow channel is smooth, generates lesser exhaust back pressure, reduces engine power loss, is easy to add
Work manufacture.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (11)
1. a kind of silencer, which is characterized in that including shell (4), the shell (4) be located at air inlet pipe (1) and escape pipe (9) it
Between and communicate therewith, the noise elimination cavity of multiple connections is equipped in the shell (4), the noise elimination cavity includes the first noise elimination cavity
(12), first noise elimination cavity (12) has an at least two sub- chambers with the air inlet pipe (1) serial communication, and described at least two
Sub- chamber includes the second sub- chamber (22) positioned at the first sub- chamber (21) of airintake direction most downstream and positioned at airintake direction most upstream, institute
The first sub- chamber (21) is stated only to be connected with sub- chamber adjacent thereto；Multiple noise elimination cavities include third noise elimination cavity (14) and the 4th
Noise elimination cavity (15), is equipped with the second pipe (6) in the third noise elimination cavity (14), and second pipe (6) is equipped with multiple holes, and described second
The air inlet of pipe (6) is pierced by the third noise elimination cavity (14), and the gas outlet of second pipe (6) is equipped with third pipe (8), and described the
The gas outlet of three pipes (8) is pierced by the third noise elimination cavity (14) and extends in the 4th noise elimination cavity (15), the third pipe
(8) diameter is less than the diameter of second pipe (6).
2. silencer according to claim 1, which is characterized in that the air inlet pipe (1) extends through described first and eliminates the noise
Chamber (12), the first sub- chamber (21) and the second sub- chamber (22) are described between the air inlet pipe (1) and the shell (4)
Second sub- chamber (22) communicates with the air inlet pipe (1)；Or the gas outlet of the air inlet pipe (1) is located at first noise elimination cavity
(12) in.
3. silencer according to claim 1, which is characterized in that diameter of at least two sub- chambers along the shell (4)
To arrangement or along the axial direction arrangement of the shell (4).
4. silencer according to claim 1, which is characterized in that first noise elimination cavity (12) is located at the shell (4)
Inlet end or middle position.
5. silencer according to claim 3, which is characterized in that be equipped between the air inlet pipe (1) and the shell (4)
The first axially extending pipe (10), the first sub- chamber (21) are located between first pipe (10) and the shell (4).
6. silencer according to claim 3, which is characterized in that be equipped with radial partition in first noise elimination cavity (12)
(16), for first noise elimination cavity (12) to be divided into at least two sub- chambers axially arranged.
7. silencer according to claim 1, which is characterized in that first noise elimination cavity (12) and the third noise elimination cavity
(14) the second noise elimination cavity (13) are equipped between, the air inlet of the gas outlet of the air inlet pipe (1) and second pipe (6) protrudes into
Second noise elimination cavity (13).
8. silencer according to claim 7, which is characterized in that the air inlet pipe (1) protrudes into second noise elimination cavity
(13) length account for the second noise elimination cavity (13) length 1/3 and/or it is described second pipe (6) protrude into second noise elimination cavity
(13) length accounts for the 1/4 of the second noise elimination cavity (13) length.
9. silencer according to claim 1, which is characterized in that the air inlet pipe (1) and second pipe (6) are in axial direction
On mutually stagger.
10. silencer according to claim 1, which is characterized in that the 4th noise elimination cavity (15) is located at the shell (4)
Outlet side, the escape pipe (9) runs through the 4th noise elimination cavity (15), and the air inlet of the escape pipe (9) protrudes into institute
It states in third noise elimination cavity (14).
11. a kind of engineering machinery, which is characterized in that including the described in any item silencers of such as claim 1~10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289625.3A CN106468198B (en) | 2016-05-04 | 2016-05-04 | Silencer and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289625.3A CN106468198B (en) | 2016-05-04 | 2016-05-04 | Silencer and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106468198A CN106468198A (en) | 2017-03-01 |
| CN106468198B true CN106468198B (en) | 2019-09-24 |
Family
ID=58229939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610289625.3A Active CN106468198B (en) | 2016-05-04 | 2016-05-04 | Silencer and engineering machinery |
Country Status (1)
| Country | Link |
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| CN113771593A (en) * | 2021-09-27 | 2021-12-10 | 重庆建设车用空调器有限责任公司 | Multi-stage noise elimination structure of rotary vane type compressor shell of air conditioner for vehicle |
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| CN203604023U (en) * | 2013-10-14 | 2014-05-21 | 成信绿集成股份有限公司 | Vacuum moisture-regaining tail gas silencer |
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| CN205618217U (en) * | 2016-05-04 | 2016-10-05 | 徐工集团工程机械有限公司 | Silencer and engineering machine tool |
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| US20020162703A1 (en) * | 2001-02-08 | 2002-11-07 | Forsythe Patrick J. | Q-pack silencer |
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| CN203604023U (en) * | 2013-10-14 | 2014-05-21 | 成信绿集成股份有限公司 | Vacuum moisture-regaining tail gas silencer |
| CN203925671U (en) * | 2014-05-28 | 2014-11-05 | 成都陵川特种工业有限责任公司 | Symmetric type three chamber bafflers |
| CN203867666U (en) * | 2014-06-04 | 2014-10-08 | 邵阳学院 | Exhaust purification and noise elimination integrated device |
| CN204591402U (en) * | 2015-01-14 | 2015-08-26 | 四川汽车工业股份有限公司 | A kind of exhaust silencer for turbosupercharged engine |
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