CN106481420B - Silencer, engine and engineering mechanical device - Google Patents
Silencer, engine and engineering mechanical device Download PDFInfo
- Publication number
- CN106481420B CN106481420B CN201610301256.5A CN201610301256A CN106481420B CN 106481420 B CN106481420 B CN 106481420B CN 201610301256 A CN201610301256 A CN 201610301256A CN 106481420 B CN106481420 B CN 106481420B
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- chamber
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- pipe
- silencer
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
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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
Abstract
The present invention relates to a kind of silencers, engine and engineering mechanical device, wherein, silencer includes shell, air inlet pipe and exhaust pipe, air inlet pipe and exhaust pipe are located on shell, the noise elimination cavity of multiple connections is equipped in shell, noise elimination cavity includes multiple main noise elimination cavities, at least one main noise elimination cavity has at least two sub- chambers of serial communication, at least two sub- chambers include: the first sub- chamber positioned at airintake direction downstream and the second sub- chamber positioned at airintake direction upstream, first sub- chamber is only connected to the second sub- chamber, first sub- chamber is divided into the cavity of multiple isolation airtight each other, each cavity passes through the second sub- chamber and is connected to air inlet pipe, exhaust pipe is connected to the second sub- chamber.Silencer of the invention can eliminate peak value of the noise under multiple specific frequencies simultaneously by the cavity of multiple isolation airtight each other, eliminate the noise to realize to the noise of specific frequency.
Description
Technical field
The present invention relates to engineering mechanical device technical fields more particularly to a kind of silencer, engine and engineering machinery to set
It is standby.
Background technique
Engine is the Main Noise Sources of engineering machinery, and noise is made of exhaust noise and Surface Radiation Noise, and is dropped
The low most common measure of exhaust noise is using exhaust silencer.
Currently, in engineering machinery using it is more be reactive muffler or impedance composite muffler.Above-mentioned silencer master
Will a certain wide-band noise to exhaust noise it is effective, but be difficult targetedly to engine ignition fundamental frequency and frequency multiplication noise
It eliminates the noise.Therefore, silencer internal structure design how is improved, special frequency channel noise can be targetedly reduced,
It is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The purpose of the present invention is to propose to a kind of silencer, engine and engineering mechanical device, such silencer can have needle
The exhaust noise at specific frequency point is eliminated to property.
To achieve the above object, first aspect present invention provides a kind of silencer, including shell, air inlet pipe and exhaust
Pipe, the air inlet pipe and the exhaust pipe are set on the housing, and the noise elimination cavity of multiple connections is equipped in the shell, described to disappear
The operatic tunes includes multiple main noise elimination cavities, at least one described main noise elimination cavity have serial communication at least two sub- chambers, it is described at least
Two sub- chambers include: the first sub- chamber positioned at airintake direction downstream and the second sub- chamber positioned at airintake direction upstream, and described first
Sub- chamber is only connected to the described second sub- chamber,
The first sub- chamber is divided into the cavity of multiple isolation airtight each other, and each cavity passes through second son
Chamber is connected to the air inlet pipe, and the exhaust pipe is connected to the described second sub- chamber.
Further, the volume of at least two cavitys and/or cross sectional shape are different.
Further, second son is intracavitary is equipped with multiple perforated pipes, and multiple perforated pipes and the cavity one are a pair of
It should be connected to, each cavity passes through the corresponding perforated pipe and is connected to the air inlet pipe.
Further, at least two perforated pipes have different latus rectums, height and/or punching rate.
Further, the noise elimination cavity further includes the inlet chamber positioned at the main noise elimination cavity upstream, and the air inlet pipe passes through
The inlet chamber is connected to the main noise elimination cavity, and the both ends of the perforated pipe connect with the inlet chamber and the first sub- chamber respectively
It is logical.
Further, one end of the perforated pipe is equipped with communicating pipe, and the perforated pipe passes through the company with corresponding cavity
Siphunculus realizes connection.
Further, the latus rectum size and/or length of at least two communicating pipes are different.
Further, the described first sub- chamber and the second sub- chamber along the silencer longitudinal arrangement.
Further, the noise elimination cavity further includes the discharge chamber positioned at the main noise elimination cavity downstream, and the exhaust pipe runs through
The discharge chamber and the first sub- chamber are connected to the described second sub- chamber, and the exhaust pipe is connected to the discharge chamber, and with described
The one sub- airtight isolation of chamber.
Further, the shell includes inner housing and outer housing, and the inner housing is equipped with opening, in the inner housing
It is equipped with third perforated pipe between the outer housing, is disposed with multiple sound attenuation holes on the third perforated pipe.
Further, there is gap between the outer housing and the third perforated pipe.
Further, the latus rectum size of the sound attenuation hole is gradually increased from the inner housing towards the outer housing.
To achieve the above object, second aspect of the present invention provides a kind of engine, including disappearing described in above-described embodiment
Sound device.
To achieve the above object, third aspect present invention provides a kind of engineering mechanical device, including above-described embodiment institute
The silencer and/or engine stated.
Based on the above-mentioned technical proposal, silencer of the invention, by the way that main noise elimination cavity is at least divided into the of serial communication
One sub- chamber and the second sub- chamber, the first sub- chamber are only connected to the second sub- chamber, and the first sub- chamber is divided into multiple isolation airtight each other
Cavity separates the transmission path of the gas entered in each cavity by the second sub- chamber, and each cavity is used as a resonance
The component part of muffling unit, when the muffling unit frequency of noise elimination for being vented crest frequency with being configured by cavity is close, just
Resonance can occur in each cavity to eliminate peak value of the noise under the frequency, to targetedly make an uproar to specific frequency
Sound realize eliminate the noise, while the gas in each cavity be blocked after can again return to the second sub- chamber, gas is in the mistake back and forth to circulate
Noise elimination effect is enhanced in journey.
It in another embodiment of the present invention, can be according to engine when such silencer being applied to engine
Working frequency configures the parameters of silencer, and this makes it possible to targetedly eliminate at engine ignition fundamental frequency and frequency multiplication
Noise, to reach good noise elimination noise reduction 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 the outline structural diagram of one embodiment of silencer of the present invention；
Fig. 2 is the cross-sectional view of the Section A-A of silencer shown in Fig. 1；
Fig. 3 is enlarged diagram at the B of silencer shown in Fig. 2；
Fig. 4 is the C-C cross-sectional view of silencer shown in Fig. 2；
Fig. 5 is the D-D cross-sectional view of silencer shown in Fig. 2；
Fig. 6 is the structural schematic diagram of one embodiment of third perforated pipe in silencer shown in Fig. 2；
Fig. 7 is the structural schematic diagram of one embodiment of inner housing in silencer shown in Fig. 2.
Description of symbols
1- air inlet pipe；2- exhaust pipe；3- first end cover；4- inner housing；5- second end cover；6- first partition；7-
Third partition；8- inlet chamber；The main noise elimination cavity of 9-；10- discharge chamber；11- second partition；The sub- chamber of 12- second；13- first
Sub- chamber；The first perforated pipe of 14-；The second perforated pipe of 15-；16- communicating pipe；17- demarcation plate；18- cavity；19- outer housing；
The gap 20-；21- third perforated pipe；22- support construction；23- sound attenuation hole.
Specific embodiment
The present invention described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.So
The various aspects of restriction can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially,
It is considered as preferred or advantageous any feature can be considered as preferred or advantageous feature group with other one or more
It closes.
The terms descriptions merely for convenience such as " first " that occurs in the present invention, " second " have same names to distinguish
Different building blocks, be not offered as successively or primary-slave relation.
In the description of the present invention, it is to be understood that, term " on ", "lower", "inner", "outside", " transverse direction ", " longitudinal direction " etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention, and
It is not that the device of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limiting the scope of the invention.
According to the practical application request of silencer, in order to eliminate the noise at specific frequency, the present invention provides one
Kind silencer, in a schematical embodiment, as depicted in figs. 1 and 2, which includes shell, air inlet pipe 1 and exhaust
Pipe 2, air inlet pipe 1 and exhaust pipe 2 are located on shell, the noise elimination cavity of multiple connections are equipped in shell, noise elimination cavity includes that multiple masters disappear
The operatic tunes 9, at least one main noise elimination cavity 9 have at least two sub- chambers of serial communication, and at least two sub- chambers include: positioned at air inlet side
The sub- chamber 13 of first downstream and the second sub- chamber 12 positioned at airintake direction upstream, the first sub- chamber 13 only connect with the second sub- chamber 12
It is logical, it is therefore an objective to make gas after entering the first sub- chamber 13 by the second sub- chamber 12, can not continue to circulate forward, the can only be rested on
One sub- chamber 13 is returned according to original route.
Wherein, the first sub- chamber 13 is divided into the cavity 18 of multiple isolation airtight each other, C-C cross-sectional view as shown in Figure 4, often
A cavity 18 is connected to by the second sub- chamber 12 with air inlet pipe 1, and exhaust pipe 2 is connected to the second sub- chamber 12.Air inlet pipe 1 and the second son
The mode of communicating of chamber 12 can choose directly connection, by pipeline connection or by the modes such as noise elimination cavity indirect communication, exhaust pipe 2
It can also be selected in these types of structure with the mode of communicating of the second sub- chamber 12.
In this embodiment, flowing into the intracorporal gas of shell from air inlet pipe 1 has two circulation paths, first, gas passes through the
Two sub- chambers 12 enter in each cavity 18, and by the barrier effect of cavity 18, portion gas will continue to be back to the second sub- chamber
12, if the silencer is mounted on the exhaust outlet of engine, in the process, when gas move back and forth when, due to by friction and
Damping, can enable a part of sound be changed into thermal energy and consume.Second, gas enters in the second sub- chamber 12 after realization noise elimination, directly
Connected the discharge of exhaust pipe 2.The gas being discharged from exhaust pipe 2 had both included the gas after directly being eliminated the noise by second of path
Body also includes the gas for returning to the second sub- chamber 12 in the first path from cavity 18.
The principle of resonant silencing is utilized in the silencer of the embodiment, can by the analysis to the embodiment course of work
In the cavity 18 for knowing multiple isolation airtight each other in the silencer, the gas that the second sub- chamber 12 enters in each cavity 18 will be passed through
The transmission path of body separates, component part of each cavity 18 as a resonant silencing unit.It, can when designing silencer
To match difference as silencer by the setting quantity of adjusting cavity 18 and the parameters such as the volume of each cavity 18 and/or shape
Frequency of noise elimination will be each when the vibration frequency of external sound wave is close with the frequency of noise elimination that is configured by cavity 18
Resonance occurs in cavity 18 to eliminate peak value of the noise under the frequency, to targetedly realize to the noise of specific frequency
It eliminates the noise.At the same time, the gas in each cavity 18 can again return to the second sub- chamber 12 after being blocked, and gas is back and forth circulating
Noise elimination effect is enhanced in the process.
In the ideal situation, the noise of each specific frequency can correspond to a Frequency point, but in practical applications,
The noise of each specific frequency is the narrow band noise comprising the Frequency point.
Since silencer of the present invention has the characteristic that can eliminate specific frequency noise, thus such silencer is especially suitable
The engine used on to all kinds of equipment the progress noise elimination noise reductions, such as various types of vehicles that there is rotation driving or execute function
Deng.At work due to such equipment, noise is larger in equipment work fundamental frequency and the amplitude at frequency multiplication, compared with other frequency ranges,
Energy of the noise at fundamental frequency and frequency multiplication accounts for the large percentage of gross energy, thus when such silencer of use, it can be according to equipment
Working frequency design silencer structural parameters, enabling silencer to the multiple discrete point in frequency of equipment, (main includes setting
Standby work fundamental frequency and frequency multiplication) at exhaust noise simultaneously eliminated, to efficiently realize noise elimination noise reduction.
In a kind of embodiment for configuring frequency of noise elimination, at least two cavitys 18 have different volumes and/or section shape
Shape.In the design process, by carrying out capacity distribution to the first sub- chamber 13, different frequency of noise elimination can be matched.Such as Fig. 4 institute
Show, be circular shell according to section, the axial multiple demarcation plates 17, Duo Gefen of setting can be parallel in the first sub- chamber 13
The two separations can be changed by changing the angle between two neighboring demarcation plate 17 along the radial distribution of shell in partition 17
The volume of cavity 18 between plate 17.This set form structure is simple, is easy to adjust the volume of cavity 18, and conveniently makes cavity
18 and second sub- chamber 12 be interconnected.
On the basis of the above embodiments, in order to enable silencer to design frequency of noise elimination value more abundant, thus
Suitable for more different types of noise sources, in another embodiment, A-A cross-sectional view and D- shown in fig. 5 as shown in Figure 2
D cross-sectional view is equipped with multiple perforated pipes in the second sub- chamber 12, and multiple perforated pipes are connected to the one-to-one correspondence of cavity 18, each cavity
18 are connected to by corresponding perforated pipe with air inlet pipe 1.In this embodiment, each cavity 18 is with corresponding perforated pipe with regard to suitable
In constituting a resonant silencing unit, when exhaust crest frequency and the muffling unit allotted out by cavity 18 and perforated pipe
When frequency of noise elimination is close, resonance will occur in each cavity to eliminate the noise under the frequency.
Further, communicating pipe 16 is opened up in one end of perforated pipe, perforated pipe is connected by communicating pipe 16 and the first sub- chamber 13
Logical, communicating pipe 16 mutually staggers in the axial direction with exhaust pipe 2.When gas moves back and forth in muffling unit, communicating pipe 16 energy
Friction and damping action are enough played, a part of sound can be enable to be changed into thermal energy and consume.Preferably, at least two communicating pipe 16
Latus rectum size and/or length it is different.In this embodiment, each cavity 18 and corresponding communicating pipe 16 and the common structure of perforated pipe
At a resonant silencing unit.
Preferably, multiple perforated pipes have different parameters, such as with different diameters, height or punching rate, with
More frequency of noise elimination can be matched according to actual needs.
By taking Fig. 5 as an example, set in the second sub- chamber 12 there are two the first perforated pipe 14 and two the second perforated pipes 15, and first
Perforated pipe 14 and the setting of the second perforated pipe 15 interval, the diameter of the first perforated pipe 14 are greater than the second perforated pipe 15.This four perforation
Pipe is corresponded with four cavitys 18 shown in Fig. 4 respectively.Wherein, punching rate refers to the gross area and list perforated on unit area
Position area ratio.In a kind of specific setting form, the punching rate of the first perforated pipe 14 and/or the second perforated pipe 15 is
12%-18%.
It is illustrated by structure to above-mentioned each embodiment and effect, the main improvement of silencer of the present invention is
Main noise elimination cavity 9 is divided at least two sub- chambers, and wherein the sub- chamber positioned at airintake direction most downstream can be real as resonant cavity
It now eliminates the noise, and the first sub- chamber 13 is more crucially divided into the cavity 18 of multiple isolation airtight each other, or further exist
The multiple perforated pipes of setting in second sub- chamber 12, a plurality of cavities 18 correspond with perforated pipe and pass through the realization of communicating pipe 16 and are connected to,
Structural parameters in this way by adjusting the volume and/or sectional area of each cavity 18, each perforated pipe (such as latus rectum, height, are worn
Porosity) and communicating pipe 16 parameter, so that it may the frequency of noise elimination for the muffling unit that adjustment is configured by cavity 18, multiple noise eliminations
Unit can eliminate multiple peaks spectrums simultaneously.If being not provided with perforated pipe in the second sub- chamber 12, and in the first sub- chamber 13 not
Be divided into a plurality of cavities 18, then can only eliminate the noise of a certain wide-band, due to can not flexible configuration frequency of noise elimination, thus cannot
Eliminate the noise of specific frequency point or narrow band frequency.
Setting form as one preferred, the first sub- chamber 13 and the second sub- chamber 12 along silencer longitudinal arrangement, this
The longitudinal direction that place mentions refers to the bulk flow direction of gas, i.e. vertical direction in Fig. 2 embodiment.In this embodiment, each
Noise elimination cavity is distributed on the same line, and the circulation path of detour can be reduced to the greatest extent by flowing into the intracorporal gas of shell from inlet tube 1 in this way,
Be conducive to reduce the exhaust back pressure of silencer.Certainly, in other setting forms, for embodiment illustrated in fig. 2, the first sub- chamber 13
It can also arrange by horizontal direction with the second sub- chamber 12.
On the basis of the various embodiments described above, noise elimination cavity further includes the inlet chamber 8 positioned at main 9 upstream of noise elimination cavity, air inlet pipe 1
It is connected to by inlet chamber 8 with main noise elimination cavity 9, the both ends of the first perforated pipe 14 are connected to inlet chamber 8 and the first sub- chamber 13 respectively.Gas
Body can eliminate the noise in inlet chamber 8 first before entering the second sub- chamber 12, can further enhance noise elimination effect.
As shown in Fig. 2, air inlet pipe 1 protrudes into inlet chamber 8, air inlet pipe 1 can pass through multiple holes on end and/or side wall
It is connected to inlet chamber 8, one end that air inlet pipe 1 protrudes into inlet chamber 8 is designed as communicating structure, and in at least partly long of air inlet pipe 1
Multiple holes are arranged on degree, can reduce the exhaust back pressure of silencer.
Further, noise elimination cavity may also include the discharge chamber 10 positioned at main 9 downstream of noise elimination cavity, and exhaust pipe 2 runs through discharge chamber
10 and first sub- chamber 13 be connected to the second sub- chamber 12, exhaust pipe 2 is connected to discharge chamber 10, and with the first sub- chamber 13 is airtight is isolated.
Inlet chamber 8, the second sub- chamber 12, the sub- chamber 13 of third and discharge chamber 10 are arranged in series along airintake direction in this way.
Preferably, multiple holes are arranged in at least partly length of exhaust pipe 2, can plays and further decreases silencer exhaust
The effect of back pressure.In a kind of optional setting form, the punching rate of exhaust pipe 2 is 25% ± 5%.Herein it should be noted that
It is that exhaust pipe 2 is not provided with hole in the length protruded into the first sub- chamber 13, to guarantee that the first sub- chamber 13 only connects with the second sub- chamber 12
It is logical.
Further, it is equipped with lateral partition in exhaust pipe 2, the pressure loss of gas flowing can be reduced, which will
The preferred division scale value range from the one end for protruding into shell of exhaust pipe 2 is 1-1.5.
In order to be separated out each noise elimination cavity mentioned in above-described embodiment, as shown in Fig. 2, from close to air inlet pipe 1 in shell
One end rise be successively arranged first partition 6, second partition 11 and third partition 7, form inlet chamber between first partition 6 and shell
8, the second sub- chamber 12 is formed between first partition 6 and second partition 11, and the first son is formed between second partition 11 and third partition 7
Chamber 13, between third partition 7 and shell formed discharge chamber 10, the both ends of perforated pipe respectively with first partition 6 and second partition 11
Connection, exhaust pipe 2 protrude into the intracorporal one end of shell and are connected on second partition 11 across third partition 7.Shell is equipped with first end
Lid 3 and second end cover 5, air inlet pipe 1 are fixed in second end cover 5, and exhaust pipe 2 is fixed in first end cover 3.
On the basis of the various embodiments described above, in order to make silencer reach more preferably performance, in an improved embodiment
In, enlarged drawing at B as shown in Figure 3, shell includes inner housing 4 and outer housing 19, structural schematic diagram as shown in Figure 6 and Figure 7,
Inner housing 4 is equipped with opening 41, realizes to make noise enter the region between inner housing 4 and outer housing 19 by opening 41
It is further to eliminate the noise.Moreover, being equipped with third perforated pipe 21 between inner housing 4 and outer housing 19, arranged on third perforated pipe 21
There are multiple sound attenuation holes 23.Preferably, sound attenuation hole 23 is variable diameter hole.The structural schematic diagram of inner housing 4 as shown in Figure 7, opening 41 are in
Rectangle, and it is evenly distributed along the axial and circumferential of inner housing 4, in addition, shape selected by opening 41 and arrangement mode are to noise elimination
For effect without materially affect, the gross area that opening 41 occupies is bigger, and more noises can be made to circulate outward by inner housing 4, from
And reach better noise elimination effect.
In this embodiment, gas can also further pass through the opening on inner housing 4 after each noise elimination cavity is eliminated the noise
41 enter between inner housing 4 and outer housing 19, are eliminated the noise with being realized by the sound attenuation hole 23 on third perforated pipe 21.Preferably,
The radial thickness of third perforated pipe 21 is 4mm-10mm.The structure of the embodiment is to eliminate noise using the principle of micropore sympathetic response.
Preferably, Fig. 6 is the structural schematic diagram of third perforated pipe 21, and the latus rectum size of sound attenuation hole 23 is from 4 direction of inner housing
Outer housing 19 is gradually increased.Preferably, sound attenuation hole 23 is 0.8mm-1.2mm close to the aperture of 4 one end of inner housing, close to shell
The aperture of 19 one end of body is 1.4mm-2mm, can also be certainly other sizes according to noise reduction Demand Design.
On this basis, as shown in figure 3, there is gap 20 between outer housing 19 and third perforated pipe 21, which is to utilize
The principle that gap is eliminated the noise eliminates noise.It is supported in gap 20 by support construction 22, for example, support construction 22 can choose
Core material, more core materials push third perforated pipe 21 to guarantee to form gap 20 between outer housing 19 and third perforated pipe 21.
It is preferably cylindrical structure by muffler desing in practice in order to make silencer facilitate processing, thus inner casing
Body 4, outer housing 19 and third perforated pipe 21 are hollow cylindrical structure, and adaptably, core material is annular structure.
For embodiment shown in Fig. 3, gas, can be further by inner housing 4 after each noise elimination cavity is eliminated the noise
Opening 41 enter sound attenuation hole 23, then into gap 20, wherein sound attenuation hole 23 is played similarly eliminates the noise work with acoustic resonator
With sound wave, which enters after void layer 20, constantly to be reflected or reflect, and the loss of sound energy is caused, to reach further noise reduction purpose.
Secondly, the present invention also provides a kind of engine, including silencer described in the various embodiments described above, silencer can be with
It is mounted on the exhaust ports of engine.Due to silencer of the invention by the volume of each cavity 18 of reasonable disposition, each wear
The structure size (such as latus rectum, height, punching rate) of hole pipe and the diameter of communicating pipe 16, can carry out multiple specific frequencies
Targetedly eliminate the noise.In view of fundamental engine and frequency multiplication noise amplitude are larger, thus can be according to hair when designing silencer
The working frequency of motivation configures the parameters of silencer, this makes it possible to targetedly eliminate engine ignition fundamental frequency and
Noise at frequency multiplication, to reach good noise elimination noise reduction effect.In some preferred embodiments, the exhaust back pressure of silencer compared with
It is low, the influence caused by engine exhaust can be reduced.
In order to make those skilled in the art to silencer of the invention have deeper into understanding, below in conjunction with shown in Fig. 2
Specific embodiment, the course of work of such silencer is described in detail.
The silencer is mounted on to the exhaust end of engine, so that motor exhaust can enter air inlet by pipeline first
Pipe 1, gas enter inlet chamber 8 from air inlet pipe 1 by the hole on end or side wall first, then from the first perforated pipe 14 and second
The end of perforated pipe 15 enters, and enters corresponding cavity 18 by communicating pipe 16, and gas continues return the after being stopped
In one perforated pipe 14 and the second perforated pipe 15, it is connected between each perforated pipe by the sub- chamber 12 of Kong Junyu second on side wall, the
Gas part in two sub- chambers 12 is discharged by the end of exhaust pipe 2, partially enters discharge chamber 10 by the hole of 2 side wall of exhaust pipe
Further realize noise elimination.
Gas can also flow to third perforated pipe from the opening 41 on inner housing 4 while eliminating the noise by main noise elimination cavity 9
21 sound attenuation hole 23 carries out micro silencer, then flows to progress gap noise elimination in gap 20, and the noise elimination structure being arranged in shell rises
The effect eliminated the noise to auxiliary.
In addition, being equipped with engine described in the various embodiments described above the present invention also provides a kind of engineering mechanical device.This
The silencer of invention has been applied to the noise elimination of engine in loading machine.Disappear since engine of the invention has passed through at work
Sound device eliminates the higher fundamental frequency of energy and frequency multiplication noise, considerably reduces the noise to external radiation, thus such engineering machine
For tool equipment in operation, the noise outwardly radiated in environment is less, has preferably environmental-protecting performance.
In addition to this, it if there is also other noise sources in addition to engine in engineering mechanical device, such as other holds
The present invention can also be mounted in the exhaust pathway of these noise sources, can thus eliminate this by row component or driving part
The noise of the specific frequency of a little noise source radiations.
A kind of silencer provided by the present invention, engine and engineering mechanical device are described in detail above.This
Specific embodiment is applied in text, and principle and implementation of the present invention are described, and the explanation of above embodiments is
It is used to help understand method and its core concept of the invention.It should be pointed out that coming for those skilled in the art
It says, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention, these improvement and modification
It also falls within the protection scope of the claims of the present invention.
Claims (13)
1. a kind of silencer, which is characterized in that including shell, air inlet pipe (1) and exhaust pipe (2), the air inlet pipe (1) and described
Exhaust pipe (2) is set on the housing, the noise elimination cavity of multiple connections is equipped in the shell, the noise elimination cavity includes that multiple masters disappear
The operatic tunes (9), at least one described main noise elimination cavity (9) have at least two sub- chambers of serial communication, at least two sub- chamber packet
It includes: the first sub- chamber (13) positioned at airintake direction downstream and the second sub- chamber (12) positioned at airintake direction upstream, first son
Chamber (13) is only connected to the described second sub- chamber (12),
The first sub- chamber (13) is divided into the cavity (18) of multiple isolation airtight each other, and each cavity (18) passes through institute
It states the second sub- chamber (12) to be connected to the air inlet pipe (1), the exhaust pipe (2) is connected to the described second sub- chamber (12)；
Multiple perforated pipes are equipped in the second sub- chamber (12), multiple perforated pipes and the cavity (18), which correspond, to be connected
Logical, each cavity (18) is connected to by the corresponding perforated pipe with the air inlet pipe (1).
2. silencer according to claim 1, which is characterized in that the volume of at least two cavitys (18) and/or cut
Face shape is different.
3. silencer according to claim 1, which is characterized in that at least two perforated pipes have different latus rectums,
Height and/or punching rate.
4. silencer according to claim 1, which is characterized in that the noise elimination cavity further includes being located at the main noise elimination cavity
(9) inlet chamber (8) of upstream, the air inlet pipe (1) is connected to by the inlet chamber (8) with the main noise elimination cavity (9), described to wear
The both ends of hole pipe are connected to the inlet chamber (8) and the first sub- chamber (13) respectively.
5. silencer according to claim 1, which is characterized in that one end of the perforated pipe is equipped with communicating pipe (16), institute
It states perforated pipe and realizes connection by the communicating pipe (16) with corresponding cavity (18).
6. silencer according to claim 5, which is characterized in that the latus rectum size of at least two communicating pipes (16)
And/or length is different.
7. silencer according to claim 1, which is characterized in that the first sub- chamber (13) and the second sub- chamber (12)
Along the longitudinal arrangement of the silencer.
8. silencer according to claim 1, which is characterized in that the noise elimination cavity further includes being located at the main noise elimination cavity
(9) discharge chamber (10) in downstream, the exhaust pipe (2) is through the discharge chamber (10) and the first sub- chamber (13) and second son
Chamber (12) connection, the exhaust pipe (2) is connected to the discharge chamber (10), and with the described first sub- chamber (13) is airtight is isolated.
9. any silencer according to claim 1~8, which is characterized in that the shell includes inner housing (4) and shell
Body (19), the inner housing (4) are equipped with opening (41), equipped with the between the inner housing (4) and the outer housing (19)
Three perforated pipes (21) are disposed with multiple sound attenuation holes (23) on the third perforated pipe (21).
10. silencer according to claim 9, which is characterized in that the outer housing (19) and the third perforated pipe
(21) there are gap (20) between.
11. silencer according to claim 9, which is characterized in that the latus rectum size of the sound attenuation hole (23) is from described interior
Shell (4) is gradually increased towards the outer housing (19).
12. a kind of engine, which is characterized in that including any silencer of claim 1~11.
13. a kind of engineering mechanical device, which is characterized in that including claim 1~the 11 any silencer and/or right
It is required that engine described in 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107170436A (en) * | 2017-07-26 | 2017-09-15 | 安徽理工大学 | A kind of collapsible resonance noise reduction method and set composite |
| CN110359981B (en) * | 2019-07-19 | 2023-08-01 | 江苏徐工工程机械研究院有限公司 | Muffler, internal combustion engine vehicle using the same, and method of controlling noise elimination thereof |
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| CN205172688U (en) * | 2015-11-30 | 2016-04-20 | 刘维兵 | Vehicle exhaust gas purifier |
| CN205618238U (en) * | 2016-05-09 | 2016-10-05 | 徐工集团工程机械有限公司 | Silencer, engine and engineering machinery equipment |
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| JP2004124708A (en) * | 2002-09-30 | 2004-04-22 | Honda Motor Co Ltd | Muffler for engine |
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| CN106481420A (en) | 2017-03-08 |
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