CN104832248A - Gasoline engine exhaust silencer - Google Patents
Gasoline engine exhaust silencer Download PDFInfo
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- CN104832248A CN104832248A CN201510237704.5A CN201510237704A CN104832248A CN 104832248 A CN104832248 A CN 104832248A CN 201510237704 A CN201510237704 A CN 201510237704A CN 104832248 A CN104832248 A CN 104832248A
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- reduction dish
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Abstract
The invention provides a gasoline engine exhaust silencer. The gasoline engine exhaust silencer comprises an air inlet bent pipe, an outer barrel, a silencing assembly, a tail pipe and a tail cover which are connected in sequence, wherein the silencing assembly is arranged in the outer barrel, and comprises a porous silencing pipe and a primary silencing disk; one end of the porous silencing pipe is connected with one end of the air inlet bent pipe, and the other end of the porous silencing pipe is provided with a blanking cap for forming a blind end; the pipe wall of the porous silencing pipe is provided with a plurality of first silencing holes; the primary silencing disk is arranged in the outer barrel and is positioned on one side along the exhaust directions of the first silencing holes; the tail pipe is inserted into the tail cover; one end of the tail pipe is arranged in the outer barrel, and the other end of the tail pipe is taken as an exhaust end which is arranged outside the outer barrel. The gasoline engine exhaust silencer is simple in structure, and has a good silencing effect; by adopting the silencer, sound waves carried by pulse air current in an exhausting process can be effectively consumed or shielded in a scientific and environment-friendly way, and additional metal sound and noise pollution caused by the impact of pulse air current on metals are effectively lowered.
Description
Technical field
The present invention relates to a kind of mechanical sound insulating devices, more particularly, relate to a kind of gasoline engine exhaust silencing apparatus.
Background technique
Along with the raising of the growing of scientific and technological level and people's living standard, various Motor Vehicle is widely used in daily life, as the motorcycle and automobile etc. that are widely used as a kind of conventional traffic tool.Because the factor of its power of motor can produce larger noise, so various noise elimination equipment is widely applied on motorcycle and automobile, to reach the object reducing noise.
Silencing apparatus a kind ofly allows air-flow to pass through and the device of attenuate acoustic noise, is one of important spare part on motorcycle and automobile.The quality of Muffler Performance not only affects the size of its noise, and has considerable influence to the power of motor, the performance such as oil consumption and moment of torsion.Wherein, the noise-cancelling theory of silencing apparatus is that utilize chamber and pipe appropriately combined produces two kinds and be used for eliminating the noise: one be utilize pipeline section suddenly change (i.e. the change of acoustic reactance) sound wave along pipe transmmision is reflected back to Sounnd source direction, thus make sound energy reflection reposition; Two is the reflections utilizing several interface, the sound wave of original first forward direction is made to get back to initial point again, and the forward direction that again turns back, this point with not yet converged by the sound wave of second forward direction reflected, and both are equal on amplitude, phase place differs from the odd-multiple of 180 degree, thus interferes with each other and offset.
But although existing silencing apparatus has certain noise elimination effect, soundproof effect is not obvious and undesirable; And air-flow directly impacts metal shell, and to make metal shell vibrate large, the noise causing metal shell vibrate causing also comparatively greatly, thus affects the overall performance of motorcycle or motor car engine.Meanwhile, existing acoustic wave filter structure more complicated, reach same soundproof effect muffler volume used comparatively large, cost is higher.
Summary of the invention
The object of the invention is to overcome shortcoming of the prior art with not enough, the gasoline engine exhaust silencing apparatus that a kind of structure is simple and soundproof effect is good is provided; This silencing apparatus can effectively consume the sound wave entrained by the pulsing airflow in its exhaust process or shield, it consumes or shields the mode science environmental protection of sound wave, and the additional metal sound effectively reducing pulsing airflow to impact metal and produce and noise pollution.
In order to achieve the above object, the present invention is achieved by following technical proposals: a kind of gasoline engine exhaust silencing apparatus, comprises the intake elbow, outer cylinder body, the sound attenuation assembly be arranged in outer cylinder body, tail pipe and the tail-hood that connect successively; It is characterized in that: described sound attenuation assembly comprises porous hush pipe and one-level noise reduction dish, described porous hush pipe one end is connected with one end of intake elbow, and the other end is provided with blanking cover and forms cecum; The tube wall of described porous hush pipe is provided with several the first sound attenuation holes, and one-level noise reduction dish to be arranged in outer cylinder body and to be positioned at the side of the first sound attenuation hole discharge directions; Described tail pipe interts on tail-hood, and its one end is arranged in outer cylinder body, and the other end is that exhaust end is located at outside outer cylinder body.
In such scheme, the air-flow of discharging from intake elbow directly by porous hush pipe to mutually liquidating at blanking cover in the blanking cover, continuous print pulsing airflow forms relative highpressure at the cecum of blanking cover, this blanking cover is by between molecule, perfectly elastic impact between molecule and blanking cover and between molecule and tube wall, the molecular motion of collision rift is finally made to become rambling from there being directivity, no longer there is the flow direction, more no longer bunchy, become without impact force, thus make the collision between gas molecule to produce metallic sound, namely regeneration noise and noise pollution can not be produced.And, one-level noise reduction dish is positioned at the structure of the side of the first sound attenuation hole discharge directions, the gas of discharging from the first sound attenuation hole is made all to be discharged to tail pipe by one-level noise reduction dish, the sound wave of then eliminating the noise through first time is again by noise elimination that one-level noise reduction dish carries out repeatedly, can sound energy consumption or shield the propagation of acoustic wave segment effectively further, finally make sound become steadily soft, the metal vibration also making silencing apparatus produce is little, effectively reduces noise pollution.
Simultaneously; flow velocity and the kinetic energy of the air-flow after porous hush pipe fully consumes kinetic energy are all significantly reduced; air-flow after cecum recoil diffuses to outer cylinder body by the first sound attenuation hole; the airflow strikes of dispersion is reduced to the intensity of outer cylinder body inwall and concentration degree; decrease the metal cylinder noise clashing into and pound out; and make outer cylinder body temperature basis equalization everywhere; avoid the generation causing silencing apparatus Partial ablation phenomenon because local temperature is too high, so also effectively can protect the outward appearance application (or outward appearance electrodeposited coating) of silencing apparatus.
More particularly, described one-level noise reduction dish is arranged in outer cylinder body and the side being positioned at the first sound attenuation hole discharge directions refers to: one end that described porous hush pipe is provided with blanking cover is interted on one-level noise reduction dish, and one-level noise reduction dish is positioned at the side of the first sound attenuation hole discharge directions.In this scenario, one-level noise reduction dish can play two effects: be the supporting effect that one-level noise reduction dish can play to porous hush pipe on the one hand; On the other hand, one-level noise reduction dish can play the effect of again eliminating the noise, specifically such, the gas of discharging from the first sound attenuation hole is all discharged to tail pipe by one-level noise reduction dish, the sound wave of then eliminating the noise through first time, can sound energy consumption or shield the propagation of acoustic wave segment effectively further again by the noise elimination that one-level noise reduction dish carries out repeatedly, finally makes sound become steadily soft, also the metal vibration making silencing apparatus produce is little, effectively reduces noise pollution.
Or described one-level noise reduction dish is arranged in outer cylinder body and the side being positioned at the first sound attenuation hole discharge directions refers to: described one-level noise reduction dish is arranged on outer cylinder body and is connected with blanking cover, and one-level noise reduction dish is positioned at the side of the first sound attenuation hole discharge directions.
Described one-level noise reduction dish and blanking cover are integrated part, one-level noise reduction dish and blanking cover one-body molded.In this scenario, one-level noise reduction dish can be one-body molded with blanking cover, and also can be connected with blanking cover be combined by the mode of welding by one-level noise reduction dish, therefore, this one-level noise reduction dish can play three effects: one is the effect that one-level noise reduction dish can play blanking cover; Two is supporting effects that one-level noise reduction dish can play to porous hush pipe; Three is that one-level noise reduction dish can play the effect of again eliminating the noise, specifically such, the gas of discharging from the first sound attenuation hole is all discharged to tail pipe by one-level noise reduction dish, the sound wave of then eliminating the noise through first time is again by noise elimination that one-level noise reduction dish carries out repeatedly, can sound energy consumption or shield the propagation of acoustic wave segment effectively further, finally make sound become steadily soft, the metal vibration also making silencing apparatus produce is little, effectively reduces noise pollution.
Described sound attenuation assembly also comprises the secondary noise reduction dish be arranged in outer cylinder body; Inner chamber and the blanking cover of described porous hush pipe form the first noise elimination cavity; Outer cylinder body is divided into the second noise elimination cavity, the 3rd noise elimination cavity and the 4th noise elimination cavity by described one-level noise reduction dish and secondary noise reduction dish successively; Described porous hush pipe is arranged in the second noise elimination cavity; One end of described tail pipe is arranged in the 4th noise elimination cavity.
Described one-level noise reduction dish is uniformly distributed and is provided with the second sound attenuation hole, and described secondary noise reduction dish is uniformly distributed and is provided with the 3rd sound attenuation hole.
The aperture d of first sound attenuation hole of at least 60%, the second sound attenuation hole or the 3rd sound attenuation hole is: 0<d≤4.5mm.
Hole centre distance H >=3d between any first sound attenuation hole, between any second sound attenuation hole or between any 3rd sound attenuation hole; Wherein d is the aperture of the first sound attenuation hole, the second sound attenuation hole or the 3rd sound attenuation hole.
The silencing apparatus used on the market now, the aperture of its sound attenuation hole is substantially all more than or equal to 5mm, and the centre distance in its hole is large all not, cause the soundproof effect of silencing apparatus bad undesirable, improve soundproof effect if want, the internal structure of silencing apparatus be transformed, make acoustic wave filter structure complicated, thus improve manufacture cost.Relative to the silencing apparatus that existing macropore and the little structure of hole centre distance cause soundproof effect poor, while silencing apparatus of the present invention utilizes the mode of aperture noise reduction principle and enlarged hole centre distance then can simplify silencing apparatus internal structure, reach good noise elimination noise reduction effect.Concrete principle is such: the present invention utilizes aperture to allow air-flow to pass through, the easier sound energy consumption of sound attenuation hole that aperture is little, shielding sound wave, and make the frequency translation of sound adult ear be not easy the high frequency noise heard, aperture noise reduction is more scientific, and cost is lower.Meanwhile, the hole centre distance of sound attenuation hole sufficiently large sound wave just can be made to pass sound attenuation hole after do not converge, or converge less, the effect reducing noise could be improved like this.And hole centre distance increases also to the Drilling operation of porous hush pipe, one-level noise reduction dish or secondary noise reduction dish, thus can reduce production difficulty, also improves its rigid construction.
Described blanking cover and porous hush pipe last ranked first the outer peripheral minimum range L >=D of sound attenuation hole, wherein, D is the pipe radius of porous hush pipe.The setting of minimum range L of the present invention can provide sufficient room to realize mutually colliding between gas molecule, thus change the moving direction of gas molecule, finally make the motion of gas molecule become disorderly and unsystematic, no longer bunchy, reduce the effect of air-flow to the shock generation additional noise of metal to reach.
Described blanking cover is arc surfaced blanking cover, one end that the cambered surface of blanking cover is connected towards porous hush pipe with intake elbow.The rebound surface of blanking cover is set to cambered surface by the present invention, and the air-flow molecule that can make rebounds returns is diversity, does not have the flow direction; Therefore, with next ripple airflow collision after, air-flow molecular motion becomes disorderly and unsystematic from there being directivity, no longer have the flow direction, more no longer bunchy, thus air-flow molecular change must without impact force.Compared with the blanking cover of plane, the blanking cover of cambered surface makes the air-flow molecule rebounding have diversity, can further improve the soundproof effect of silencing apparatus.
Above-mentioned gasoline engine exhaust silencing apparatus is work like this:
(1) air-flow that petrol engine is discharged directly enters porous hush pipe from intake elbow, and air-flow main flow directly rushes at blanking cover along porous hush pipe and consumes in the first noise elimination cavity.Main flow pulsing airflow will clash into blanking cover, consume a part of kinetic energy; Now, the pulsing airflow to airintake direction recoil constantly liquidates mutually with another part pulsing airflow rushing at blanking cover cecum, and forms relative highpressure at porous hush pipe inner chamber tail end, in the mutual impact process of air-flow, can reach soundproof effect.The first sound attenuation hole that porous hush pipe sidewall is opened allows gas molecule to pass through, but sound energy consumption or shield the propagation of acoustic wave segment effectively.
(2) after consuming, eliminate kinetic energy and the vibration of pulsing airflow largely, make the air-flow in silencing apparatus keep steadily soft.
All gas disperses out to enter the second noise elimination cavity from the first sound attenuation hole of porous hush pipe, and then enters the 3rd noise elimination cavity by the second sound attenuation hole on one-level noise reduction dish.Gas enters the 4th noise elimination cavity by the 3rd sound attenuation hole on secondary noise reduction dish more subsequently.
Wherein, the second sound attenuation hole and the 3rd sound attenuation hole allow gas molecule to pass through, but sound energy consumption or shield the propagation of acoustic wave segment effectively.Last gas steadily leniently discharges external environment by tail pipe, reduces exhaust noise largely.
In whole process, air-flow liquidates mutually at porous hush pipe inner chamber tail end, and form relative highpressure at porous hush pipe inner chamber tail end, not only consume the kinetic energy of air-flow, direction is constantly changed by the mutual collision between gas molecule, the motion of gas molecule is made to become disorderly and unsystematic, no longer bunchy.Thus the metallic sound that efficiently avoid airflow strikes metal and produce, be also additional noise.Collision between gas molecule can not produce metallic sound, and the bore dia of first sound attenuation hole of at least 60%, the second sound attenuation hole or the 3rd sound attenuation hole is less, effectively consumes and shields acoustic wave segment.The mode science environmental protection of noise reduction of the present invention, instead of and traditional utilize asbestos etc. valuable and country prohibits the use not environmentally material is eliminated the noise, meet the requirement of national energy-saving environmental protection completely.Meanwhile, the metal vibration that mutually liquidating between air-flow causes is also relatively little, to the effect reducing the vibrations of car load when high speed operation and also play.
Compared with prior art, tool of the present invention has the following advantages and beneficial effect:
1, the soundproof effect of gasoline engine exhaust silencing apparatus of the present invention is good, the moving direction of gas is changed by the mutual collision between gas molecule, the motion of gas molecule is made to become disorderly and unsystematic, no longer bunchy, largely avoided the metallic sound that air-flow produces the shock of silencing apparatus parts metals; Meanwhile, because the bore dia of each sound attenuation hole is less, adopt pitch-row, quantity all scientific design aperture noise reduction technology out in aperture and hole, these apertures allow gas to pass through, but sound energy consumption or shield the propagation of acoustic wave segment effectively.
2, one-level noise reduction dish of the present invention is positioned at the structure of the side of the first sound attenuation hole discharge directions, the gas of discharging from the first sound attenuation hole is made all to be discharged to tail pipe by one-level noise reduction dish, the sound wave of then eliminating the noise through first time is again by noise elimination that one-level noise reduction dish carries out repeatedly, can sound energy consumption or shield the propagation of acoustic wave segment effectively further, sound is finally made to become steadily soft, also the metal vibration making silencing apparatus produce is little, effectively reduces noise pollution.
3, acoustic wave filter structure of the present invention is simple, production process simple, long service life, cost are low, soundproof effect good and highly versatile, because air-flow is straight-through, flows to the process not having to reflux, so the power loss of silencing apparatus is little in silencing apparatus inside.Be conducive to universal and promote.
Accompanying drawing explanation
Fig. 1 is the structural representation of gasoline engine exhaust silencing apparatus in embodiment one;
Fig. 2 is A direction view in Fig. 1;
Fig. 3 is B direction view in Fig. 1;
Fig. 4 is the structural representation of porous hush pipe in embodiment one;
Fig. 5 is the structural representation of gasoline engine exhaust silencing apparatus in embodiment two;
Fig. 6 is C direction view in Fig. 5;
Fig. 7 is D direction view in Fig. 5;
Fig. 8 is the schematic diagram that in embodiment two, porous hush pipe is connected with one-level noise reduction dish;
Fig. 9 is the structural representation of gasoline engine exhaust silencing apparatus in embodiment three;
Figure 10 is E direction view in Fig. 9;
Figure 11 is F direction view in Fig. 9;
Wherein, 1 be intake elbow, 2 be outer cylinder body, 3 be tail pipe, 4 be tail-hood, 5 be porous hush pipe, 6 be one-level noise reduction dish, 7 be secondary noise reduction dish, 8 for blanking cover, 9 be the first sound attenuation hole, 10 be the first noise elimination cavity, 11 be the second noise elimination cavity, 12 to be the 3rd noise elimination cavity, 13 be the 4th noise elimination cavity, 14 be the 3rd sound attenuation hole for mesopore, 15 is the second sound attenuation hole, 16.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment one
One end that the present embodiment is provided with blanking cover for porous hush pipe is interted on one-level noise reduction dish to being described below.
As shown in Figures 1 to 4, gasoline engine exhaust silencing apparatus of the present invention comprises the intake elbow 1, outer cylinder body 2, the sound attenuation assembly be arranged in outer cylinder body 2, tail pipe 3 and the tail-hood 4 that connect successively; Wherein, the secondary noise reduction dish 7 that sound attenuation assembly comprises porous hush pipe 5, one-level noise reduction dish 6 and is arranged in outer cylinder body 2, porous hush pipe 5 one end is connected with one end of intake elbow 1, and the other end is provided with blanking cover 8 and forms cecum, and the tube wall of porous hush pipe 5 is provided with several the first sound attenuation holes 9.And tail pipe 3 interts on tail-hood 4, its one end is arranged in silencing apparatus outer cylinder body 2, and the other end is that exhaust end is located at outside outer cylinder body 2.
In the present embodiment, one end that porous hush pipe 5 is provided with blanking cover 8 is interted on one-level noise reduction dish 6, and one-level noise reduction dish 6 is positioned at the side of the first sound attenuation hole 9 discharge directions.In this scenario, one-level noise reduction dish 6 can play two effects: be the supporting effect that one-level noise reduction dish 6 can play to porous hush pipe 5 on the one hand; On the other hand, one-level noise reduction dish 6 can play the effect of again eliminating the noise, specifically such, the gas of discharging from the first sound attenuation hole 9 is all discharged to tail pipe 3 by one-level noise reduction dish 6, the sound wave of then eliminating the noise through first time, can sound energy consumption or shield the propagation of acoustic wave segment effectively further again by the noise elimination that one-level noise reduction dish 6 carries out repeatedly, finally makes sound become steadily soft, also the metal vibration making silencing apparatus produce is little, effectively reduces noise pollution.
The inner chamber of porous hush pipe 5 of the present invention and blanking cover 8 form the first noise elimination cavity 10, and outer cylinder body 2 is divided into the second noise elimination cavity 11, the 3rd noise elimination cavity 12 and the 4th noise elimination cavity 13 by one-level noise reduction dish 6 and secondary noise reduction dish 7 successively, porous hush pipe 5 is arranged in the second noise elimination cavity 12, and one end of tail pipe 3 is arranged in the 4th noise elimination cavity 13.
As shown in Figure 3, one-level noise reduction dish 6 is for offering the noise reduction dish of mesopore 14, and one end that porous hush pipe 5 is provided with blanking cover 8 is firmly interted on one-level noise reduction dish by mesopore 14 for the schematic diagram of one-level noise reduction dish 6 of the present invention.One-level noise reduction dish 6 is also uniformly distributed and is provided with the second sound attenuation hole 15.As shown in Figure 2, secondary noise reduction dish 7 is uniformly distributed and is provided with the 3rd sound attenuation hole 16 schematic diagram of secondary noise reduction dish 7 of the present invention.The present invention, in order to solve leakage water problem, is provided with recess bottom one-level noise reduction dish 6 and secondary noise reduction dish 7.
In order to improve soundproof effect, first sound attenuation hole 9, second sound attenuation hole 15 of the present invention at least 60% or the aperture d of the 3rd sound attenuation hole 16 are: 0<d≤4.5mm, and the hole centre distance H between any first sound attenuation hole 9, between any second sound attenuation hole 15 or between any 3rd sound attenuation hole 16 is 3d; Wherein d is the aperture of the first sound attenuation hole 9, second sound attenuation hole 15 or the 3rd sound attenuation hole 16.Relative to the silencing apparatus that existing macropore and the little structure of hole centre distance cause soundproof effect poor, while silencing apparatus of the present invention utilizes the mode of aperture noise reduction principle and enlarged hole centre distance then can simplify silencing apparatus internal structure, reach good noise elimination noise reduction effect.Concrete principle is such: the present invention utilizes aperture to allow air-flow to pass through, the easier sound energy consumption of sound attenuation hole that aperture is little, shielding sound wave, and make the frequency translation of sound adult ear be not easy the high frequency noise heard, aperture noise reduction is more scientific, and cost is lower.Meanwhile, the hole centre distance of sound attenuation hole sufficiently large sound wave just can be made to pass sound attenuation hole after do not converge, or converge less, the effect reducing noise could be improved like this.
As shown in Figure 4, last ranked first the outer peripheral minimum range L >=D of sound attenuation hole 9 to blanking cover 8 of the present invention with porous hush pipe 5, and wherein, D is the pipe radius of porous hush pipe 5.The setting of minimum range L of the present invention can provide sufficient room to realize mutually colliding between gas molecule, thus change the moving direction of gas molecule, finally make the motion of gas molecule become disorderly and unsystematic, no longer bunchy, reduce the effect of air-flow to the shock generation additional noise of metal to reach.In order to improve soundproof effect further, blanking cover 8 of the present invention is arc surfaced blanking cover, one end that the cambered surface of blanking cover 8 is connected towards porous hush pipe 5 with intake elbow 1.The rebound surface of blanking cover 8 is set to cambered surface by the present invention, and the air-flow molecule that can make rebounds returns is diversity, does not have the flow direction; Therefore, with next ripple airflow collision after, air-flow molecular motion becomes disorderly and unsystematic from there being directivity, no longer have the flow direction, more no longer bunchy, thus air-flow molecular change must without impact force.Compared with the blanking cover of plane, the blanking cover 8 of cambered surface makes the air-flow molecule rebounding have diversity, can further improve the soundproof effect of silencing apparatus.
Above-mentioned gasoline engine exhaust silencing apparatus is work like this:
(1) air-flow that petrol engine is discharged directly enters porous hush pipe 5 from intake elbow 1, and air-flow main flow directly rushes at blanking cover 8 along porous hush pipe 5 and consumes in the first noise elimination cavity 10.Main flow pulsing airflow will clash into blanking cover 8, consume a part of kinetic energy; Now, the pulsing airflow to airintake direction recoil constantly liquidates mutually with another part pulsing airflow rushing at blanking cover 8 cecum, and forms relative highpressure at porous hush pipe 5 inner chamber tail end, in the mutual impact process of air-flow, can reach soundproof effect.The first sound attenuation hole 9 that porous hush pipe 5 sidewall is opened allows gas molecule to pass through, but sound energy consumption or shield the propagation of acoustic wave segment effectively.
(2) after consuming, eliminate kinetic energy and the vibration of pulsing airflow largely, make the air-flow in silencing apparatus keep steadily soft.
All gas disperses out to enter the second noise elimination cavity 11 from the first sound attenuation hole 9 of porous hush pipe 5, and then enters the 3rd noise elimination cavity 12 by the second sound attenuation hole 15 on one-level noise reduction dish 6.Gas enters the 4th noise elimination cavity 13 by the 3rd sound attenuation hole 16 on secondary noise reduction dish 7 more subsequently.
Wherein, the second sound attenuation hole 15 and the 3rd sound attenuation hole 16 allow gas molecule to pass through, but sound energy consumption or shield the propagation of acoustic wave segment effectively.Last gas steadily leniently discharges external environment by tail pipe 3, reduces exhaust noise largely.
In whole process, air-flow liquidates mutually at porous hush pipe 5 inner chamber tail end, and form relative highpressure at porous hush pipe 5 inner chamber tail end, not only consume the kinetic energy of air-flow, direction is constantly changed by the mutual collision between gas molecule, the motion of gas molecule is made to become disorderly and unsystematic, no longer bunchy.Thus the metallic sound that efficiently avoid airflow strikes metal and produce, be also additional noise.Collision between gas molecule can not produce metallic sound, and the bore dia of first sound attenuation hole 10, second sound attenuation hole 15 of at least 60% or the 3rd sound attenuation hole 16 is less, effectively consumes and shields acoustic wave segment.The mode science environmental protection of noise reduction of the present invention, instead of and traditional utilize asbestos etc. valuable and country prohibits the use not environmentally material is eliminated the noise, meet the requirement of national energy-saving environmental protection completely.Meanwhile, the metal vibration that mutually liquidating between air-flow causes is also relatively little, to the effect reducing the vibrations of car load when high speed operation and also play.
Embodiment two
The present embodiment and embodiment one difference are only: as shown in Fig. 5 to 8, and one-level noise reduction dish 6 and blanking cover 8 are connected to form one.
In the present embodiment, one-level noise reduction dish 6 to be arranged in outer cylinder body 2 and to be connected with blanking cover 8, and one-level noise reduction dish 6 is positioned at the side of the first sound attenuation hole 9 discharge directions, and wherein, blanking cover 8 is connected with the middle part of one-level noise reduction dish 6, and one-body molded with one-level noise reduction dish 6.
In the present embodiment, one-level noise reduction dish 6 to be also connected with blanking cover 8 by the mode of welding and to combine, and therefore, this one-level noise reduction dish 6 can play three effects: one is the effect that one-level noise reduction dish 6 can play blanking cover 8; Two is supporting effects that one-level noise reduction dish 6 can play to porous hush pipe 5; Three is that one-level noise reduction dish 6 can play the effect of again eliminating the noise, specifically such, the gas of discharging from the first sound attenuation hole 9 is all discharged to tail pipe 3 by one-level noise reduction dish 6, the sound wave of then eliminating the noise through first time is again by noise elimination that one-level noise reduction dish 6 carries out repeatedly, can sound energy consumption or shield the propagation of acoustic wave segment effectively further, finally make sound become steadily soft, the metal vibration also making silencing apparatus produce is little, effectively reduces noise pollution.
Other structure of the present embodiment is consistent with embodiment one.
Embodiment three
The present embodiment and embodiment one difference are only: as shown in Figs. 9 to 11, and one end that porous hush pipe 5 is provided with blanking cover 8 is not interted on one-level noise reduction dish 6.The one-level noise reduction dish 6 of the present embodiment to be arranged in outer cylinder body 2 and to be positioned at the side of the first sound attenuation hole 9 discharge directions, and away from porous hush pipe 5.The one-level noise reduction dish 6 of the present embodiment does not arrange mesopore, and it is uniformly distributed and is provided with the second sound attenuation hole 15.
Other structure of the present embodiment is consistent with embodiment one.
Embodiment four
The present embodiment and embodiment one difference are only: the hole centre distance 3d<H<5d between any first sound attenuation hole, between any second sound attenuation hole or between any 3rd sound attenuation hole; Wherein d is the aperture of the first sound attenuation hole, the second sound attenuation hole or the 3rd sound attenuation hole.
The present embodiment hole centre distance is 3d<H<5d, can reduce the Drilling operation to porous hush pipe, one-level noise reduction dish or secondary noise reduction dish, thus increase its rigid construction, also can reach good noise elimination noise reduction effect.Therefore, the situation that the scope that arranges of the present embodiment mesopore centre distance is porous hush pipe, the rigid construction of one-level noise reduction dish or secondary noise reduction dish and noise elimination noise reduction effect match, an equinoctial point can be reached, rigid construction requirement can be reached, noise elimination noise reduction effect can be mentioned again.
Other structure of the present embodiment is consistent with embodiment one.
Embodiment five
The present embodiment and embodiment one difference are only: the hole centre distance H >=5d between any first sound attenuation hole, between any second sound attenuation hole or between any 3rd sound attenuation hole; Wherein d is the aperture of the first sound attenuation hole, the second sound attenuation hole or the 3rd sound attenuation hole.
Other structure of the present embodiment is consistent with embodiment one.
Above-described embodiment is the present invention's preferably mode of execution; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. a gasoline engine exhaust silencing apparatus, comprises the intake elbow, outer cylinder body, the sound attenuation assembly be arranged in outer cylinder body, tail pipe and the tail-hood that connect successively; It is characterized in that: described sound attenuation assembly comprises porous hush pipe and one-level noise reduction dish, described porous hush pipe one end is connected with one end of intake elbow, and the other end is provided with blanking cover and forms cecum; The tube wall of described porous hush pipe is provided with several the first sound attenuation holes, and one-level noise reduction dish to be arranged in outer cylinder body and to be positioned at the side of the first sound attenuation hole discharge directions; Described tail pipe interts on tail-hood, and its one end is arranged in outer cylinder body, and the other end is that exhaust end is located at outside outer cylinder body.
2. gasoline engine exhaust silencing apparatus according to claim 1, it is characterized in that: described one-level noise reduction dish is arranged in outer cylinder body and the side being positioned at the first sound attenuation hole discharge directions refers to: one end that described porous hush pipe is provided with blanking cover is interted on one-level noise reduction dish, and one-level noise reduction dish is positioned at the side of the first sound attenuation hole discharge directions.
3. gasoline engine exhaust silencing apparatus according to claim 1, it is characterized in that: described one-level noise reduction dish is arranged in outer cylinder body and the side being positioned at the first sound attenuation hole discharge directions refers to: described one-level noise reduction dish is arranged on outer cylinder body and is connected with blanking cover, and one-level noise reduction dish is positioned at the side of the first sound attenuation hole discharge directions.
4. gasoline engine exhaust silencing apparatus according to claim 3, is characterized in that: described one-level noise reduction dish and blanking cover are integrated part, one-level noise reduction dish and blanking cover one-body molded.
5. gasoline engine exhaust silencing apparatus according to any one of claim 1 to 4, is characterized in that: described sound attenuation assembly also comprises the secondary noise reduction dish be arranged in outer cylinder body; Inner chamber and the blanking cover of described porous hush pipe form the first noise elimination cavity; Outer cylinder body is divided into the second noise elimination cavity, the 3rd noise elimination cavity and the 4th noise elimination cavity by described one-level noise reduction dish and secondary noise reduction dish successively; Described porous hush pipe is arranged in the second noise elimination cavity; One end of described tail pipe is arranged in the 4th noise elimination cavity.
6. gasoline engine exhaust silencing apparatus according to claim 5, is characterized in that: described one-level noise reduction dish is uniformly distributed and is provided with the second sound attenuation hole, and described secondary noise reduction dish is uniformly distributed and is provided with the 3rd sound attenuation hole.
7. gasoline engine exhaust silencing apparatus according to claim 6, is characterized in that: the aperture d of first sound attenuation hole of at least 60%, the second sound attenuation hole or the 3rd sound attenuation hole is: 0<d≤4.5mm.
8. gasoline engine exhaust silencing apparatus according to claim 7, is characterized in that: the hole centre distance H >=3d between any first sound attenuation hole, between any second sound attenuation hole or between any 3rd sound attenuation hole; Wherein d is the aperture of the first sound attenuation hole, the second sound attenuation hole or the 3rd sound attenuation hole.
9. gasoline engine exhaust silencing apparatus according to claim 1, is characterized in that: described blanking cover and porous hush pipe last ranked first the outer peripheral minimum range L >=D of sound attenuation hole, wherein, D is the pipe radius of porous hush pipe.
10. gasoline engine exhaust silencing apparatus according to claim 1, is characterized in that: described blanking cover is arc surfaced blanking cover, one end that the cambered surface of blanking cover is connected towards porous hush pipe with intake elbow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510237704.5A CN104832248A (en) | 2015-05-12 | 2015-05-12 | Gasoline engine exhaust silencer |
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| CN201510237704.5A CN104832248A (en) | 2015-05-12 | 2015-05-12 | Gasoline engine exhaust silencer |
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| CN104832248A true CN104832248A (en) | 2015-08-12 |
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| CN201510237704.5A Pending CN104832248A (en) | 2015-05-12 | 2015-05-12 | Gasoline engine exhaust silencer |
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| CN (1) | CN104832248A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3074220A1 (en) * | 2017-11-27 | 2019-05-31 | Psa Automobiles Sa | EXHAUST MUFFLER |
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| CN201568112U (en) * | 2009-09-30 | 2010-09-01 | 重庆恒科机械制造有限公司 | Exhaust muffler |
| JP2012189020A (en) * | 2011-03-11 | 2012-10-04 | Honda Motor Co Ltd | Exhaust device of internal combustion engine |
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| CN204663625U (en) * | 2015-05-12 | 2015-09-23 | 杨萧睿 | A kind of gasoline engine exhaust silencing apparatus |
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| JP2003262113A (en) * | 2002-03-08 | 2003-09-19 | Kawasaki Heavy Ind Ltd | Muffler for engine and motorcycle |
| CN201474753U (en) * | 2009-04-27 | 2010-05-19 | 广东银河摩托车集团有限公司 | Mute muffler |
| CN201568112U (en) * | 2009-09-30 | 2010-09-01 | 重庆恒科机械制造有限公司 | Exhaust muffler |
| JP2012189020A (en) * | 2011-03-11 | 2012-10-04 | Honda Motor Co Ltd | Exhaust device of internal combustion engine |
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| FR3074220A1 (en) * | 2017-11-27 | 2019-05-31 | Psa Automobiles Sa | EXHAUST MUFFLER |
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Application publication date: 20150812 |