CN211087922U - Damping noise eliminator with high insertion loss - Google Patents
Damping noise eliminator with high insertion loss Download PDFInfo
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- CN211087922U CN211087922U CN201921565505.7U CN201921565505U CN211087922U CN 211087922 U CN211087922 U CN 211087922U CN 201921565505 U CN201921565505 U CN 201921565505U CN 211087922 U CN211087922 U CN 211087922U
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- damping
- sound absorption
- sound
- keel
- woven fabric
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- 238000013016 damping Methods 0.000 title claims abstract description 50
- 238000003780 insertion Methods 0.000 title claims abstract description 15
- 230000037431 insertion Effects 0.000 title claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000004744 fabric Substances 0.000 claims abstract description 22
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 22
- 239000003365 glass fiber Substances 0.000 claims abstract description 19
- 239000011358 absorbing material Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 12
- 229910052755 nonmetal Inorganic materials 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 230000003584 silencer Effects 0.000 abstract description 31
- 230000030279 gene silencing Effects 0.000 description 13
- 238000009434 installation Methods 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a damping noise eliminator with high insertion loss, which comprises a sound absorption module, a protection module and a flow guide module; the protection module comprises an anechoic sheet, the anechoic sheet comprises a keel (2), glass fiber cloth/non-woven fabric (3) covering the outer layer of the keel (2), and a damping net piece (4) arranged on the outer layer of the glass fiber cloth/non-woven fabric (3), and the glass fiber cloth/non-woven fabric (3) and the damping net piece (4) are both provided with array holes; the sound absorption module comprises a sound absorption layer made of sound absorption materials (1), the sound absorption layer is arranged on the inner layer of the keel (2), and array holes matched with the glass fiber cloth/non-woven fabric (3) and the damping net piece (4) are formed in the sound absorption layer and used for reflecting and absorbing sound wave energy; the flow guide module comprises a flow guide cover. The utility model discloses a damping noise eliminator, sound absorption module pass through sound absorbing material and absorb the sound wave, have improved the upper limit value that the silencer head-on wind speed can allow, have improved noise eliminator's the performance of making an uproar of falling.
Description
Technical Field
The utility model belongs to the technical field of the silencer, more specifically relates to a damping noise eliminator of high insertion loss.
Background
Noise has a great influence on the environment, and therefore, in an industrial production process, in order to protect the environment and solve the problem of noise generation of electromechanical equipment, various forms of noise dampers are designed and used. However, the existing mufflers, especially mufflers for electromechanical devices such as large fans, central air conditioners, motors, water pumps, etc., have some problems, deficiencies or defects.
The vent system outlet is typically provided with a muffler to control airflow noise. The silencer is divided into a sheet type silencer and a matrix type silencer according to different structural forms. The important structural component of the silencer is a silencing sheet, and the silencer is generally composed of a plurality of silencing sheets according to a certain arrangement rule. When the air volume of a ventilation system is large and the installation size of the silencer is limited, the upper limit value allowed by the head-on air speed of the silencer is seriously influenced by overlarge regenerative noise of a general silencer, so that the sectional area of the silencer can only be enlarged. However, when the ventilation system is limited in space, it causes difficulty in installation.
SUMMERY OF THE UTILITY MODEL
To the above defect of prior art or improve the demand, the utility model provides a damping noise eliminator of high insertion loss, sound absorption module pass through sound absorbing material and absorb the sound wave, and protection module then will fix and shock attenuation protection to sound absorption module, plays supplementary noise reduction effect simultaneously, and the water conservancy diversion module has improved the upper limit value that the silencer head-on wind speed can allow, has improved noise eliminator's the performance of making an uproar that falls.
In order to achieve the above object, the present invention provides a damping noise-abatement device with high insertion loss, which comprises a sound absorption module, a protection module and a flow guide module; wherein,
the protection module comprises an acoustic sheet, the acoustic sheet comprises a keel, glass fiber cloth/non-woven fabric covered on the outer layer of the keel, and a damping net piece arranged on the outer layer of the glass fiber cloth/non-woven fabric, and the glass fiber cloth/non-woven fabric and the damping net piece are both provided with array holes;
the sound absorption module comprises a sound absorption layer made of sound absorption materials, the sound absorption layer is arranged on the inner layer of the keel, provided with array holes matched with the glass fiber cloth/non-woven fabric and the damping net piece and used for reflecting and absorbing sound wave energy;
the flow guide module comprises flow guide covers which are arranged at two ends of the protection module and connected with the protection module, and the flow guide covers are of a streamline arc structure or a quadrangular frustum flow guide structure and realize the flow guide effect of the damper device.
Furthermore, the protection module is of a rectangular annular structure, and the damping net piece is made of nonmetal or damping materials and punched.
Further, the sound absorption material is loose porous material and is filled in the interlayer of the keel.
Further, the keel comprises a plurality of rectangular frames.
Furthermore, the air guide sleeve is a streamline air guide sleeve which is made of metal or nonmetal materials and has a streamline arc structure, and two sides of the streamline air guide sleeve are respectively connected with the protection module.
Furthermore, the long sides of the silencing pieces are connected in sequence to form a rectangular silencing annular structure, and the two ends of the silencing piece are provided with quadrangular frustum pyramid-shaped air guide sleeves.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
1. the utility model discloses a damping noise eliminator, sound absorption module pass through sound absorbing material and absorb the sound wave, and protection module then will fix and shock attenuation protection to sound absorption module, plays supplementary noise reduction effect simultaneously, and water conservancy diversion module has improved the upper limit value that the silencer head-on wind speed can allow, has improved noise eliminator's the performance of making an uproar of falling.
2. The utility model discloses a damping noise eliminator, damping net piece have replaced traditional metal or the mesh piece that non-metallic hard material punched a hole, can cut down the vibration of the damping net piece that the turbulent air flow that gets into the silencer arouses fast, with the energy rapid consumption of this part turbulent flow to reduce the secondary sound that the flow caused the vibration and arouse, reduce the noise of regeneration, improve insertion loss.
3. The utility model discloses a damping noise eliminator, because the noise regeneration is reduced, the suitable wind speed of silencer obtains improving to reduce the volume of silencer, reduce the space and occupy.
4. The utility model discloses a damping noise eliminator is provided with the protective layer that glass silk cloth/non-woven fabrics are constituteed below damping net piece, and simultaneously, glass silk cloth/non-woven fabrics possess outstanding heat resistance and humidity resistance, and this makes the long-time function of noise elimination piece have ensured.
5. The utility model discloses a damping noise eliminator, sound absorbing material fill in the fossil fragments intermediate layer, and be loose porous material mostly, when sound spreads into component material surface into, sound energy partly is reflected, and partly pierces through the material, and one in addition because vibration or sound of component material rub with surrounding medium when wherein propagating, become heat energy by sound energy conversion, and sound energy is lost.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of an arc damping muffler device according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of an arc damping muffler device according to an embodiment of the present invention;
fig. 3 is an expanded schematic view of an arc damping muffler device according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a matrix muffler device according to an embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-sound absorption material, 2-keel, 3-glass fiber cloth/non-woven fabric, 4-damping net sheet, 5-streamline air guide sleeve and 6-quadrangular frustum pyramid type air guide sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, an embodiment of the present invention provides an arc damping muffler device, which mainly includes three parts, namely a sound absorption module, a protection module and a flow guide module. The sound absorption module mainly comprises sound absorption materials 1 and is the core part of the whole sound absorption sheet. The protection module comprises a keel 2, glass fiber cloth/non-woven fabric 3 and a damping net piece 4, and the flow guide module consists of a flow guide cover 5. The sound absorption module absorbs sound waves through the sound absorption material 1, and the protection module fixes and protects the sound absorption module in a damping mode and plays a role in assisting noise reduction. The diversion module improves the upper limit value allowed by the head-on wind speed of the silencer, and solves the problem that when the wind volume of a ventilation system is large and the installation size of the silencer is limited, the upper limit value allowed by the head-on wind speed of the silencer is seriously influenced by overlarge regenerative noise of a common silencer, so that the sectional area of the silencer can only be enlarged, but when the space of the ventilation system is limited, the silencer brings difficulty to installation and construction.
As shown in fig. 1, 2 and 3, the protection module comprises a keel 2, a glass cloth 3/non-woven fabric and a damping mesh 4. The main body of the silencing sheet is a rectangular cylinder, the internal material is arranged into a vertically symmetrical structure, two ends of the silencing sheet are provided with air guide hoods 5, and the upper end and the lower end of the silencing sheet are covered on the surface by damping meshes 4. The damping net 4 is in a rectangular sheet shape, and a plurality of holes are formed in the surface of the damping net. Secondly, the damping mesh 4 replaces the traditional mesh punched by metal or nonmetal hard materials, so that the vibration of the damping mesh 4 caused by turbulent airflow entering the silencer can be quickly reduced, the energy of the turbulent airflow is quickly consumed, secondary sound caused by flow-induced vibration is reduced, regenerative noise is reduced, and insertion loss (the insertion loss refers to the difference between the sound pressure level or the sound power level before and after the silencer is installed, which is measured by a certain fixed point in space) is improved. The regenerative noise is reduced, and the applicable wind speed of the silencer is improved, so that the volume of the silencer is reduced, and the occupied space is reduced. A protective layer consisting of glass fiber cloth/non-woven fabric 3 is arranged below the damping net piece 4, and meanwhile, the glass fiber cloth/non-woven fabric 3 has excellent heat resistance and moisture resistance, so that long-time operation of the silencing piece is guaranteed. In addition, the glass fiber cloth/non-woven fabric 3 has high tensile strength and good insulating property, and has good protection effect on the internal sound attenuation material 1. The keel 2 is positioned below a protective layer formed by the glass fiber cloth/non-woven fabric 3, and the keel 2 consists of a plurality of rectangular frames, namely, the sound absorption material 1 is fixed, and the whole protective module is also fixed. The sound absorption module mainly comprises a sound absorption material 1, wherein the sound absorption material 1 is filled in a keel 2 interlayer and is mostly made of loose and porous materials, when sound is transmitted to the surface of a component material, part of sound energy is reflected, part of sound energy penetrates through the material, and part of sound energy is converted into heat energy by friction with surrounding media due to vibration of the component material or sound transmission in the component material, and the sound energy is lost, namely the sound is absorbed by the sound absorption material 1. The flow guide module mainly comprises a flow guide cover 5, wherein the flow guide cover 5 is positioned at two ends of the silencing sheet and is of a semi-arc structure, and metal or non-metal materials can be selectively arranged according to the use environment to form the flow guide cover 5. In addition, the air guide sleeve 5 can guide the air flow to the damping net piece 4, the upper limit value allowed by the head-on air speed of the silencer is increased, and the silencing quantity is increased.
As shown in fig. 4, another embodiment of the present invention provides a matrix type noise-reduction sheet, the main body of which is a rectangular cylinder, four surfaces of which are provided with damping meshes 4, and the interior of which is provided with sound-absorbing material 1, keel 2, and glass fiber cloth 3/non-woven fabric. The main structure of the silencer is similar to that of the first embodiment, long sides of a plurality of silencing pieces are sequentially connected to form a rectangular silencer frame, and then quadrangular frustum pyramid-shaped guide covers 6 are arranged at two ends of the rectangular silencer frame, so that the facing air flow can be guided to four surfaces provided with damping net pieces 4, the upper limit value allowed by the facing air speed of the silencer is increased, and the silencing amount is increased.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (6)
1. A damping noise eliminator with high insertion loss is characterized by comprising a sound absorption module, a protection module and a flow guide module; wherein,
the protection module comprises an anechoic sheet, the anechoic sheet comprises a keel (2), glass fiber cloth/non-woven fabric (3) covering the outer layer of the keel (2), and a damping net piece (4) arranged on the outer layer of the glass fiber cloth/non-woven fabric (3), and the glass fiber cloth/non-woven fabric (3) and the damping net piece (4) are both provided with array holes;
the sound absorption module comprises a sound absorption layer made of sound absorption materials (1), the sound absorption layer is arranged on the inner layer of the keel (2), and array holes matched with the glass fiber cloth/non-woven fabric (3) and the damping net piece (4) are formed in the sound absorption layer and used for reflecting and absorbing sound wave energy;
the flow guide module comprises flow guide covers which are arranged at two ends of the protection module, are connected with the protection module and are of streamline arc structures or quadrangular frustum pyramid flow guide structures, and the flow guide effect of the damper device is achieved.
2. The damping and noise-eliminating device with high insertion loss according to claim 1, characterized in that the protection module is a rectangular ring structure, and the damping mesh (4) is made of non-metal or damping material and punched.
3. A high insertion loss damping and sound-attenuating device as claimed in claim 1, characterized in that the sound-absorbing material (1) is a loose porous material filled in the interlayer of the keel (2).
4. A high insertion loss damped sound attenuating device according to any one of claims 1-3, characterised in that the keel (2) comprises a plurality of rectangular frames.
5. The damping and noise-eliminating device with high insertion loss according to any one of claims 1 to 3, wherein the fairings are streamline fairings (5), the streamline fairings (5) are made of metal or nonmetal materials and are in streamline arc structures, and two sides of the streamline fairings are respectively connected with the protection modules.
6. A high insertion loss damping muffler device according to any one of claims 1-3, wherein the long sides of the muffling sheets are connected in sequence to form a rectangular muffling annular structure, and the rectangular muffling annular structure is provided with quadrangular frustum pyramid fairings (6) at two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921565505.7U CN211087922U (en) | 2019-09-20 | 2019-09-20 | Damping noise eliminator with high insertion loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921565505.7U CN211087922U (en) | 2019-09-20 | 2019-09-20 | Damping noise eliminator with high insertion loss |
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| Publication Number | Publication Date |
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| CN211087922U true CN211087922U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921565505.7U Active CN211087922U (en) | 2019-09-20 | 2019-09-20 | Damping noise eliminator with high insertion loss |
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| Country | Link |
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| CN (1) | CN211087922U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595052A (en) * | 2019-09-20 | 2019-12-20 | 武汉源海博创科技有限公司 | Silencer with adjustable and excellent performance adapting to air inlet parameters |
-
2019
- 2019-09-20 CN CN201921565505.7U patent/CN211087922U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595052A (en) * | 2019-09-20 | 2019-12-20 | 武汉源海博创科技有限公司 | Silencer with adjustable and excellent performance adapting to air inlet parameters |
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