CN216278081U - Filtering exhaust silencing device based on metal rubber - Google Patents

Abstract

The utility model discloses a filtering exhaust silencing device based on metal rubber, which mainly relates to the technical field of automobile exhaust silencing equipment; the silencer comprises a cylindrical silencing shell, wherein an air inlet cover body is arranged at the front end of the silencing shell, an air outlet cover body is arranged at the rear end of the silencing shell, round hole limiting plates are arranged in the air inlet cover body and the air outlet cover body respectively, a plurality of groups of round holes with different inner diameters are arranged on the round hole limiting plates, a first metal rubber block and a silencing pipeline are sequentially arranged in the silencing shell from front to back, a back cavity and a second metal rubber block are sequentially arranged in the silencing pipeline from back to front, and a stepped hole is formed in the rear end of the second metal rubber block; the utility model introduces the metal rubber as a noise elimination element, effectively solves the adverse effects of high-temperature oxidation, water vapor permeation and the like, and the problem that the material of the porous material is easy to deteriorate in a humid environment, and effectively prevents the pipeline from being blocked.

Description

Filtering exhaust silencing device based on metal rubber

Technical Field

The utility model relates to the technical field of automobile exhaust silencing equipment, in particular to a filtering exhaust silencing device based on metal rubber.

Background

At present, a silencing device is mostly filled with silencing filler, and a porous medium is used for sound absorption and the like for silencing, and due to the reasons of high-temperature oxidation sound absorption filler, water vapor permeation sound absorption filler and the like, and the porous material is easy to cause the situation of pore blockage in a humid environment, the material is deteriorated, so that the sound absorption performance of the material is influenced. In daily life, the exhaust pipe is soaked or dampened, and the muffler device is easily corroded after a long time, so that the muffling effect is reduced. On the other hand, at present, the silencer often utilizes the principle of micro-perforated plate holes to muffle sound, so the diameter of the holes needing to be designed is very small, and after the silencer is used for a long time, an air passage is easily blocked by burning wastes such as accumulated carbon black and the like, and is difficult to clean.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, and provides a filtering exhaust silencing device based on metal rubber, which introduces the metal rubber as a silencing element, effectively solves the adverse effects of high-temperature oxidation, water vapor permeation and the like, and the problem that a porous material is easy to deteriorate in a humid environment, and effectively prevents a pipeline from being blocked.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a filter exhaust silencing device based on metal rubber, includes the amortization shell of tube-shape, the front end of amortization shell is equipped with the lid that admits air, and the rear end is equipped with the lid of giving vent to anger, admit air the lid, give vent to anger and all be equipped with the round hole limiting plate in the lid, be equipped with the different round hole of a plurality of internal diameters of group on the round hole limiting plate, from first metal rubber piece, amortization pipeline in proper order backward forward in the amortization shell, be equipped with cavity behind one's back, second metal rubber piece forward in the amortization pipeline from the back in proper order, the rear end of second metal rubber piece is equipped with the shoulder hole.

Preferably, the air inlet cover body and the air outlet cover body are detachably connected with the silencing shell, and sealing pieces are arranged between the air inlet cover body and the air outlet cover body and between the air inlet cover body and the silencing shell.

Preferably, a positioning circular tube matched with the second metal rubber block is arranged in the silencing pipeline, and a limiting ring is arranged on the inner side of the rear end of the positioning circular tube.

Preferably, the silencing pipe comprises a tapered pipe and a straight pipe fixed at the rear end of the tapered pipe, the front end of the tapered pipe is fixedly connected with the inner wall of the silencing shell, the outer diameter of the rear end of the tapered pipe is smaller than that of the front end of the tapered pipe, the outer diameter of the straight pipe is the same as that of the rear end of the tapered pipe, and the rear end face of the straight pipe and the rear end face of the silencing shell are located on the same plane.

Preferably, the rear end of the tapered pipeline and the front end of the straight pipeline are both provided with a plurality of through holes.

Preferably, a metal rubber sound-deadening layer is filled between the outer wall of the tapered pipeline and the inner wall of the sound-deadening shell.

Preferably, the length of the back cavity is not less than one third of the length of the straight pipeline.

Preferably, the porosity of the first metal rubber block is 65% -75%, and the wire diameter of the metal wire is smaller than 1 mm.

Preferably, the porosity of the second metal rubber block and the porosity of the metal rubber noise reduction layer are both 75% -85%, and the wire diameter of the metal wire is smaller than 1 mm.

Preferably, the second metal rubber block comprises a columnar metal rubber block and a plurality of annular metal rubber blocks with different inner diameters, which are sequentially arranged from front to back.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model effectively solves the adverse effects of high-temperature oxidation, water vapor permeation and the like of the existing filling silencing filler by utilizing the characteristics of high and low temperature resistance, corrosion resistance, fatigue aging resistance and the like of the metal rubber, and the problem that the material of the porous material is easy to deteriorate in a humid environment. And the pipeline is effectively prevented from being blocked by adjusting the porosity.

2. In addition, the metal rubber material has the advantages of small equipment and tool consumption, low preparation cost and the like in the preparation process, and based on the natural advantages of the metal rubber, the pipeline noise reduction device has the advantages of low manufacturing cost, simple structure, easiness in disassembly and good noise reduction performance.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a silencer housing;

FIG. 3 is a schematic structural view of a second metal rubber block;

fig. 4 is a structural schematic diagram of the circular hole limiting plate.

Reference numerals shown in the drawings: 1. a sound deadening housing; 2. an air intake cover body; 3. an air outlet cover body; 4. a circular hole limiting plate; 5. a first metal rubber block; 6. a sound-deadening duct; 61. positioning a circular tube; 62. a through hole; 7. a back cavity; 8. a second metal rubber block; 81. a stepped hole; 9. a metal rubber sound deadening layer;

Detailed Description

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

In the prior art, metal rubber has good environmental adaptability as a fiber porous sound absorption material. The metal rubber is a porous elastic material prepared by a specific process method, metal wire turns in the metal rubber are mutually crossed and hooked to form mutually communicated pores, and fluid such as air is allowed to pass through the pores, so that the effective porosity is high. The metal rubber material has a large number of interconnected and disordered pores from the surface to the inside, and has higher sound absorption coefficient than materials such as porous aluminum and the like.

Example (b): as shown in fig. 1-4, the present invention relates to a filtering exhaust muffler device based on metal rubber, which includes a cylindrical muffler housing 1, wherein an air inlet cover 2 is disposed at the front end of the muffler housing 1, an air outlet cover 3 is disposed at the rear end of the muffler housing, and the air inlet cover 2 is connected to an automobile exhaust pipe, preferably, for convenience of disassembly and maintenance of the present invention, the air inlet cover 2 and the air outlet cover 3 are detachably connected to the muffler housing 1, external threads can be processed at the front and rear ends of the muffler housing 1, corresponding internal threads are processed on the air inlet cover 2 and the air outlet cover 3, and sealing members are disposed between the air inlet cover 2 and the muffler housing 1, for example, during threaded connection, the sealing strips can be wound around the threads, and the sealing strips can ensure the sealing performance between the air inlet cover 2 and the air outlet cover 3 and the muffler housing 1. All be equipped with round hole limiting plate 4 in the lid 2, the lid 3 of giving vent to anger of admitting air, be equipped with the different round hole of a plurality of groups internal diameter on the round hole limiting plate 4, as shown in figure 4, every group round hole all arranges along the axial lead ring array of round hole limiting plate 4, admits air and all can adopt the welded mode to be connected between lid 2, the lid 3 of giving vent to anger and the round hole limiting plate 4. When tail gas flows through the round hole limiting plate 4, the flow velocity of the entering tail gas and the exhaust tail gas is reduced due to the diversion effect of the round hole, and noise can be reduced.

The first metal rubber block 5 and the silencing pipeline 6 are sequentially arranged in the silencing shell 1 from front to back, the total length of the silencing pipeline 6 is two thirds of that of the silencing shell 1, and the first metal rubber block 5 is completely filled in the remaining one third of the silencing shell 1. The air inlet cover body 2, the silencing shell 1, the silencing pipeline 6 and the air outlet cover body 3 are all coaxially arranged.

Preferably, the silencing pipe 6 comprises a tapered pipe with a large front end and a small rear end and a straight pipe welded at the rear end of the tapered pipe, the front end of the tapered pipe is welded on the inner wall of the silencing shell 1, the outer diameter of the rear end of the tapered pipe is smaller than that of the front end of the tapered pipe, the outer diameter of the straight pipe is the same as that of the rear end of the tapered pipe, and the rear end face of the straight pipe and the rear end face of the silencing shell 1 are located on the same plane. And a metal rubber silencing layer 9 is filled between the outer wall of the tapered pipeline and the inner wall of the silencing shell 1.

Furthermore, the rear end of the tapered pipeline and the front end of the straight pipeline are both provided with a plurality of through holes 62, so that part of the tail gas entering the silencing pipeline 6 can enter the metal rubber silencing layer 9 through the through holes 62, and the other part of the tail gas enters the second metal rubber block 8 through the silencing pipeline 6.

The utility model discloses a noise reduction pipe, including amortization pipeline 6, the cavity 7 behind one's back, second metal rubber piece 8 are equipped with from the back forward in proper order in the amortization pipeline 6, the rear end of second metal rubber piece 8 is equipped with shoulder hole 81, adopts the ladder cavity structure behind one's back, can improve low frequency sound absorption performance to a certain extent to because sound absorbing material's installation space is limited, adopt behind one's back the design of cavity to realize subtracting the heavy demand.

Preferably, for the installation of the second metal rubber block of convenience, the welding has the location pipe 61 that suits with second metal rubber block 8 in the amortization pipeline 6, the inboard of the rear end of location pipe 61 is equipped with the spacing ring, adopts the integral type structure between spacing ring and the location pipe 61, and the internal diameter of spacing ring is less than the external diameter of second metal rubber block 8, location pipe 61 is located the straight pipeline of amortization pipeline 6 and is located the rear side of through-hole 62. Preferably, for the convenience of the second metal rubber block, the second metal rubber block 8 includes the different cyclic annular metal rubber blocks of column metal rubber block and a plurality of internal diameter that set gradually from the front to the back, and the thickness of different cyclic annular metal rubber blocks is different, fills back in the pipe 61 of location in proper order with the different cyclic annular metal rubber blocks of column metal rubber block and a plurality of internal diameter, accomplishes the preparation of second metal rubber block promptly.

Preferably, the length of the back cavity 7 is not less than one third of the length of the straight pipe of the silencing pipe 6, so that a resonance peak can move to low frequency, the low-frequency sound absorption performance is improved, the effect is equivalent to increase of the material thickness, and a resonance phenomenon still exists when the cavity thickness is large.

Preferably, the porosity of the first metal rubber block 5 is 65% -75%, and the wire diameter of the metal wire is less than 1mm, the entering exhaust gas can be firstly roughly filtered, and simultaneously, the primary silencing treatment is carried out.

Preferably, the porosities of the second metal rubber block 8 and the metal rubber sound-deadening layer 9 are 75-85%, and the wire diameter of the metal wire is smaller than 1mm, so that the residual tail gas can be further filtered and subjected to sound-deadening treatment, and the purpose of sound deadening is achieved. Because the wire of second metal rubber piece 8 sets up the diameter ratio and is thinner, is less than 1mm for the area of contact of wire and air increases, has increased viscous friction and heat conduction loss. When the thickness of the second metal rubber block 8 is relatively thick, the propagation distance of sound waves in the material can be increased, so that the attenuation of the sound waves in the material is increased, and the low-frequency sound absorption performance is improved. When the thickness is larger, the sound wave can be approximately transmitted without reflection in the material, and most of the sound wave is absorbed on the surface of the material.

When the exhaust gas inlet cover is used, the exhaust gas enters the inside of the air inlet cover body 2 through the exhaust pipe, the gas firstly passes through the circular hole limiting plate 4 in the air inlet cover body 2, and when the exhaust gas flows through the circular hole limiting plate 4 in the air inlet cover body 2, the flow guiding effect of the circular hole on the circular hole limiting plate 4 reduces the flow speed of the entering exhaust gas and reduces the noise. The decelerated tail gas enters the first metal rubber block 5, the porosity of the first metal rubber block 5 is 65% -75%, the wire diameter is smaller than 1mm, when sound waves enter the first metal rubber block 5, air in the holes moves and rubs metal wire turns, due to the viscosity and the heat conduction effect of the air, the sound energy is converted into heat energy to be dissipated, the first metal rubber block 5 firstly performs coarse filtration on the entering tail gas, and simultaneously performs primary silencing treatment. Tail gas after preliminary dust removal gets into amortization pipeline 6, partly through-hole 62 that sets up through amortization pipeline 6, get into metal rubber noise damping layer 9, partly straight pipeline along amortization pipeline 6 gets into second metal rubber piece 8, the porosity of metal rubber noise damping layer 9 and second metal rubber piece 8 is 75% -85%, further filter and amortization processing remaining tail gas, and cavity 7 makes the formant toward low frequency movement behind the back through the design, low frequency sound absorption performance has been improved, thereby further reach the purpose of sound absorption. The treated tail gas is finally discharged at a low speed through the flow guiding effect of the circular hole limiting plate 4 in the vent cover body 3, so that the aim of silencing is fulfilled.

In order to overcome the defects in the prior art, the utility model introduces metal rubber as a noise elimination element. The metal rubber has small hygroscopicity (generally less than 5%), so that the metal rubber has little influence on the sound absorption performance, and has the advantages of high and low temperature resistance, corrosion resistance, fatigue aging resistance and the like, thereby effectively solving the adverse effects of high-temperature oxidation, water vapor permeation and the like. In addition, the metal rubber has controllable porosity, so that the metal rubber can be easily made into various complicated shapes. So can effectually filter exhaust gas particulate matter through adjusting its porosity, prevent that the amortization pipeline from blockking up. In addition, the metal rubber material has the advantages of small equipment and tool consumption, low preparation cost and the like in the preparation process, and based on the natural advantages of the metal rubber, the metal rubber has the advantages of low manufacturing cost, simple structure, easiness in disassembly and good noise elimination performance.

Claims (10)

1. The utility model provides a filter exhaust silencing device based on metal rubber, includes amortization shell (1) of tube-shape, the front end of amortization shell (1) is equipped with air inlet cover body (2), and the rear end is equipped with air outlet cover body (3), its characterized in that: all be equipped with round hole limiting plate (4) in lid (2) admits air, the lid of giving vent to anger (3), be equipped with the different round hole of a plurality of internal diameters of group on round hole limiting plate (4), from first metal rubber piece (5), amortization pipeline (6) in proper order forward backward in amortization shell (1), be equipped with cavity behind one's back (7), second metal rubber piece (8) forward backward in amortization pipeline (6) in proper order, the rear end of second metal rubber piece (8) is equipped with shoulder hole (81).

2. A filtering exhaust silencing device based on metal rubber according to claim 1, characterized in that: the air inlet cover body (2) and the air outlet cover body (3) are detachably connected with the silencing shell (1), and sealing pieces are arranged among the air inlet cover body (2), the air outlet cover body (3) and the silencing shell (1).

3. A filtering exhaust silencing device based on metal rubber according to claim 1, characterized in that: be equipped with in amortization pipeline (6) and fix a position pipe (61) that suit with second metal rubber piece (8), the inboard of the rear end of fixing a position pipe (61) is equipped with the spacing ring.

4. A filtering exhaust silencing device based on metal rubber according to claim 1, characterized in that: the noise reduction pipeline (6) comprises a tapered pipeline and a straight pipeline fixed at the rear end of the tapered pipeline, the front end of the tapered pipeline is fixedly connected with the inner wall of the noise reduction shell (1), the outer diameter of the rear end of the tapered pipeline is smaller than that of the front end of the tapered pipeline, the outer diameter of the straight pipeline is the same as that of the rear end of the tapered pipeline, and the rear end face of the straight pipeline and the rear end face of the noise reduction shell (1) are located on the same plane.

5. The metal rubber-based filtering exhaust muffler device according to claim 4, wherein: the rear end of the tapered pipeline and the front end of the straight pipeline are both provided with a plurality of through holes (62).

6. A filtering exhaust silencing device based on metal rubber according to claim 4 or 5, characterized in that: and a metal rubber silencing layer (9) is filled between the outer wall of the reducing pipeline and the inner wall of the silencing shell (1).

7. The metal rubber-based filtering exhaust muffler device according to claim 4, wherein: the length of the back cavity (7) is not less than one third of the length of the straight pipeline.

8. A filtering exhaust silencing device based on metal rubber according to claim 1, characterized in that: the porosity of the first metal rubber block (5) is 65% -75%, and the wire diameter of the metal wire is smaller than 1 mm.

9. A filtering exhaust silencing device based on metal rubber according to claim 6, characterized in that: the porosity of the second metal rubber block (8) and the porosity of the metal rubber noise reduction layer (9) are both 75-85%, and the wire diameter of the metal wire is smaller than 1 mm.

10. A filtering exhaust silencing device based on metal rubber according to claim 1, characterized in that: the second metal rubber block (8) comprises a columnar metal rubber block and a plurality of annular metal rubber blocks with different inner diameters, wherein the columnar metal rubber block and the plurality of annular metal rubber blocks are sequentially arranged from front to back.

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