CN210925471U

CN210925471U - Broadband combined type silencing element

Info

Publication number: CN210925471U
Application number: CN201921137746.1U
Authority: CN
Inventors: 欧浩鑫; 吕名群
Original assignee: Changsha Weichuang Environmental Engineering Equipment Co ltd
Current assignee: Changsha Weichuang Environmental Engineering Equipment Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-07-03
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a broadband combined type silencing element, which comprises a sound-insulation through pipe and a plurality of silencing pipes arranged in the sound-insulation through pipe, wherein the silencing pipes are arranged in the sound-insulation through pipe in parallel, each silencing pipe comprises an inner silencing pipe and an outer silencing pipe which are sleeved inside and outside, a silencing chamber is arranged between the inner silencing pipe and the outer silencing pipe, and porous materials are filled in the silencing chamber; the utility model discloses a silencer, including the amortization inner tube, the pipe of amortization inner tube is intraductal to give vent to anger the end and has set gradually air current speed reduction chamber and amortization chamber by the inlet end, the interval is equipped with the amortization ring of multichannel closed type on the inner wall in air current speed reduction chamber, the inner wall in amortization chamber evenly is equipped with a plurality of bleeder vents, bleeder vent and amortization room intercommunication, the inner wall in amortization chamber is close to the outlet end and is equipped with annular venthole, venthole and amorti. The noise reduction and silencing device has the characteristic of good noise reduction and silencing.

Description

Broadband combined type silencing element

Technical Field

The utility model relates to a silencing equipment technical field especially relates to a wide band combination formula amortization component.

Background

Silencers are a device that prevents sound transmission while allowing airflow through, and are an important measure for eliminating aerodynamic noise. The silencer is a device for reducing noise, which is arranged on an airflow channel of air power equipment (such as a blower, an air compressor, a boiler exhaust port, a generator, a water pump and other equipment with high noise at an exhaust port) or in an air inlet and exhaust system.

When the gas passes through the pipeline, noise is generated due to friction with the pipe wall, and particularly for some high-speed gases, the faster the gas flow speed is, the louder the sound generated by the friction is, and the user experience is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wide band combination formula amortization component for connect the noise in order to reduce gaseous production on the outlet duct of aerodynamic device.

The utility model adopts the technical proposal that: a broadband combined type silencing element comprises a sound-insulation through pipe and a plurality of silencing pipes arranged in the sound-insulation through pipe, wherein the silencing pipes are arranged in the sound-insulation through pipe in parallel, each silencing pipe comprises a silencing inner pipe and a silencing outer pipe which are sleeved inside and outside, a silencing chamber is arranged between each silencing inner pipe and each silencing outer pipe, and porous materials are filled in each silencing chamber;

the utility model discloses a silencer, including the amortization inner tube, the pipe of amortization inner tube is intraductal to give vent to anger the end and has set gradually air current speed reduction chamber and amortization chamber by the inlet end, the interval is equipped with the amortization ring of multichannel closed type on the inner wall in air current speed reduction chamber, the inner wall in amortization chamber evenly is equipped with a plurality of bleeder vents, bleeder vent and amortization room intercommunication, the inner wall in amortization chamber is close to the outlet end and is equipped with annular venthole, venthole and amorti.

Further optimize, the pipe wall of the sound insulation through pipe comprises an inner layer sound-deadening layer and an outer layer sound-deadening layer, and a sound-deadening cotton filling layer is arranged between the inner layer sound-deadening layer and the outer layer sound-deadening layer.

Further optimize, inlayer amortization layer includes honeycomb damping layer, interior protective layer and outer protective layer are established respectively at the inside and outside two sides on honeycomb damping layer.

The honeycomb damping layer is formed by compounding two layers of honeycomb plates with honeycomb structures, the honeycomb structures of the two honeycomb plates are distributed in a vertical symmetrical mode, each honeycomb structure comprises a plurality of circular truncated cone-shaped honeycomb units, the honeycomb units of the two honeycomb plates correspond to one another, and the top surfaces of the honeycomb units are arranged in a dumbbell shape relatively.

Further optimized, the air holes are obliquely arranged from the air inlet end of the silencing cavity to the air outlet end of the silencing cavity).

Preferably, the sound attenuation ring is made of elastic material.

The utility model has the advantages that: after the air current got into the hush pipe, when the air current slows down the chamber through the air current, can reduce the wind speed of air current through the amortization ring, reduce the friction of gas and pipe wall, thereby preliminary amortization, when the air current passes through the hush chamber, some gas directly discharges from the gas outlet, some gas gets into the hush chamber by the bleeder vent, the gaseous micropore tissue that gets into porous material of the intussuseption of hush chamber intussuseption is after, gas speed is slowed down greatly, slowly get rid of from the venthole at last, and simultaneously, the noise that the outside syllable-dividing siphunculus of hush pipe can further reduction air current produced, thereby reach the mesh that the amortization was fallen and make.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic cross-sectional view of an embodiment of a broadband combined muffler element of the present invention;

FIG. 2 is a schematic view of the structure of the silencer duct;

FIG. 3 is a front sectional view of the silencer duct;

fig. 4 is a schematic cross-sectional view of the wall of the sound-insulating duct.

Detailed Description

As shown in fig. 1 to 3, the broadband combined type silencing element includes a sound-proof through pipe 100 and a plurality of silencing tubes 200 disposed in the sound-proof through pipe 100, the silencing tubes 200 are arranged in parallel in the sound-proof through pipe 100, the silencing tubes 200 include an inner silencing tube 210 and an outer silencing tube 220 sleeved inside and outside, a silencing chamber 300 is disposed between the inner silencing tube 210 and the outer silencing tube 220, and the silencing chamber 300 is filled with a porous material;

the air flow deceleration cavity 211 and the silencing cavity 212 are sequentially arranged from the air inlet end to the air outlet end in the silencing inner tube 210, a plurality of closed silencing rings 400 are arranged on the inner wall of the air flow deceleration cavity 211 at intervals, a plurality of air holes 500 are uniformly formed in the inner wall of the silencing cavity 212, the air holes 500 are communicated with the silencing chamber 300, an annular air outlet 600 is formed in the inner wall of the silencing cavity 212 close to the air outlet end, and the air outlet 600 is communicated with the silencing chamber 300.

After the sound insulation through pipe 100 enters the air outlet pipe of the corresponding aerodynamic device, the air is shunted and enters each silencing pipe 200. After the air flow enters the silencing tube 200, when the air flow passes through the air flow decelerating cavity 211, the air speed of the air flow can be reduced through the silencing ring 400, and the friction between the air and the tube wall is reduced, so that the preliminary silencing is realized.

When the gas flows through the silencing chamber 212, a part of the gas is directly discharged from the gas outlet of the silencing inner tube 210, a part of the gas enters the silencing chamber 300 through the gas holes 500, and the silencing chamber 300 is filled with a porous material, which can be a sponge, a sound-absorbing cotton or other materials with a large number of microporous structures. After the gas enters the microporous structure of the porous material, the gas speed is greatly reduced, and finally the gas is slowly discharged from the gas outlet 600, so that the noise of the gas flow is reduced. Meanwhile, the sound insulation through pipe 100 outside the silencing pipe 200 can further isolate noise generated by airflow, thereby achieving the purpose of silencing and reducing noise.

As shown in fig. 4, the wall of the sound-proof through pipe 100 includes an inner sound-deadening layer 110 and an outer sound-deadening layer 120, and a sound-deadening cotton filling layer 130 is disposed between the inner sound-deadening layer 110 and the outer sound-deadening layer 120. After the noise of the air flow is reduced through the silencing pipe 200, the generated noise is absorbed through the silencing cotton filling layer 130, and then the noise is further reduced, and the noise reduction effect is improved.

Further, the inner sound-deadening layer 110 includes a honeycomb damping layer 111, an inner protective layer 112 and an outer protective layer 113, and the inner protective layer 112 and the outer protective layer 113 are respectively disposed on the inner surface and the outer surface of the honeycomb damping layer 111. The honeycomb damping layer 111 has a high structural strength, has a light weight, and has a good sound insulation effect, and can reduce the overall weight of the sound insulation through pipe 100.

Further, the honeycomb damping layer 111 is formed by compounding two honeycomb plates 700 with honeycomb structures, the honeycomb structures of the two honeycomb plates 700 are distributed in a vertical symmetrical mode, each honeycomb structure comprises a plurality of circular truncated cone-shaped honeycomb units, the honeycomb units of the two honeycomb plates 700 correspond to one another one by one, and the top surfaces of the honeycomb units are arranged in a dumbbell shape relatively.

The air holes 500 are obliquely arranged from the air inlet end of the silencing cavity 212 to the air outlet end of the silencing cavity 212, so that the air inlets of the air holes 500 face the air inlet direction of the silencing pipe 200, more air enters the silencing chamber 300, the flow rate of directly exhausting the air is reduced, and the noise reduction effect is improved.

The silencing ring 400 is made of an elastic material, and when the silencing ring 400 made of the elastic material slows down the flow rate of gas, excessive friction noise cannot be generated, and meanwhile, a part of energy can be absorbed, so that the effect of reducing noise is achieved. The elastic material can be made of rubber and the like.

Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. A broadband combined type silencing element is characterized in that: the sound-absorbing and sound-absorbing device comprises a sound-insulating through pipe (100) and a plurality of sound-absorbing pipes (200) arranged in the sound-insulating through pipe (100), wherein the sound-absorbing pipes (200) are arranged in the sound-insulating through pipe (100) in parallel, each sound-absorbing pipe (200) comprises a sound-absorbing inner pipe (210) and a sound-absorbing outer pipe (220) which are sleeved inside and outside, a sound-absorbing chamber (300) is arranged between each sound-absorbing inner pipe (210) and each sound-absorbing outer pipe (220), and porous materials are filled in each sound-absorbing chamber (300);

the intraductal air current speed reduction chamber (211) and amortization chamber (212) of having set gradually by the inlet end to the end of giving vent to anger of amortization inner tube (210), the interval is equipped with the amortization ring (400) of multichannel closed type on the inner wall of air current speed reduction chamber (211), the inner wall of amortization chamber (212) evenly is equipped with a plurality of bleeder vents (500), bleeder vent (500) and amortization room (300) intercommunication, it is equipped with annular venthole (600) to be close to the outlet end on the inner wall of amortization chamber (212), venthole (600) and amortization room (300) intercommunication.

2. The broadband combination silencer element of claim 1, wherein: the pipe wall of the sound-insulation through pipe (100) comprises an inner sound-deadening layer (110) and an outer sound-deadening layer (120), and a sound-deadening cotton filling layer (130) is arranged between the inner sound-deadening layer (110) and the outer sound-deadening layer (120).

3. The broadband combination silencer element of claim 2, wherein: the inner-layer sound-absorbing layer (110) comprises a honeycomb damping layer (111), an inner protection layer (112) and an outer protection layer (113), wherein the inner protection layer (112) and the outer protection layer (113) are respectively arranged on the inner surface and the outer surface of the honeycomb damping layer (111).

4. The broadband combination silencer element of claim 3, wherein: the honeycomb damping layer (111) is formed by compounding two honeycomb plates (700) with honeycomb structures, the honeycomb structures of the two honeycomb plates (700) are distributed in an up-and-down symmetrical mode, each honeycomb structure comprises a plurality of circular truncated cone-shaped honeycomb units, the honeycomb units of the two honeycomb plates (700) correspond to one another, and the top surfaces of the honeycomb units are arranged in a dumbbell shape oppositely.

5. The broadband modular sound attenuating element of any one of claims 1 to 4, wherein: the air holes (500) are obliquely arranged from the air inlet end of the silencing cavity (212) to the air outlet end of the silencing cavity (212).

6. The broadband modular sound attenuating element of any one of claims 1 to 4, wherein: the sound dampening ring (400) is made of an elastic material.