CN219916697U - Low resistance loss bent plate muffler - Google Patents
Low resistance loss bent plate muffler Download PDFInfo
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- CN219916697U CN219916697U CN202320612583.8U CN202320612583U CN219916697U CN 219916697 U CN219916697 U CN 219916697U CN 202320612583 U CN202320612583 U CN 202320612583U CN 219916697 U CN219916697 U CN 219916697U
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- plate
- muffler
- curved
- curved surface
- noise elimination
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- 230000008030 elimination Effects 0.000 claims abstract description 21
- 238000003379 elimination reaction Methods 0.000 claims abstract description 21
- 229920000742 Cotton Polymers 0.000 claims abstract description 19
- 230000030279 gene silencing Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000003365 glass fiber Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 241000628997 Flos Species 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000011358 absorbing material Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Exhaust Silencers (AREA)
Abstract
The utility model provides a low resistance loss bent plate muffler, which belongs to the technical field of mufflers, and comprises: a plurality of curved surface noise elimination boards that are parallel to each other, there is the clearance between two adjacent curved surface noise elimination boards, and the two sides of every curved surface noise elimination board are the perforated plate, and it is cotton to fill between two perforated plates to have the noise elimination. The utility model has the advantages of larger sound attenuation and lower resistance loss coefficient, and meets the design requirement of the aero-acoustic wind tunnel.
Description
Technical Field
The utility model belongs to the technical field of silencers, and particularly relates to a low-resistance-loss bent plate silencer.
Background
In a pneumatic acoustic wind tunnel, the test environment requires low background noise, sound sources such as fans and the like are required to be subjected to noise elimination treatment, a muffler is added in a wind tunnel airflow pipeline, in addition, in order to reduce the overall airflow resistance loss of the wind tunnel, the design energy ratio of the wind tunnel is increased, and the muffler also needs to have a lower resistance loss coefficient, so that the design of the low resistance loss bent plate muffler is necessary, has a larger noise elimination amount, and simultaneously has a lower resistance loss coefficient, and meets the design requirement of the pneumatic acoustic wind tunnel.
The conventional muffler for pipelines such as an acoustic wind tunnel is a sheet muffler, and the resistance loss is large, so that the power of a wind tunnel power system is further increased, and the manufacturing cost is increased.
Disclosure of Invention
In order to solve the problems that the wind tunnel power system power is further increased and the manufacturing cost is increased due to larger resistance loss of the sheet type muffler in the related art, the utility model provides a low resistance loss bent plate muffler, which comprises the following technical scheme:
a low drag loss bent plate muffler comprising: a plurality of curved surface noise elimination boards that are parallel to each other, there is the clearance between two adjacent curved surface noise elimination boards, and the two sides of every curved surface noise elimination board are the perforated plate, and it is cotton to fill between two perforated plates to have the noise elimination.
Optionally, the noise-damping cotton is wrapped with glass fiber cloth.
Alternatively, the distance between two adjacent curved surface silencing plates is 100-300 mm.
Alternatively, the curved muffler plate and the perforated plate are secured together by a plurality of vertical beams.
Optionally, the vertical beam is perpendicular to the curved surface silencing plate and the plate surface of the perforated plate.
Optionally, the vertical beam is welded on the curved surface muffler plate and the perforated plate.
Optionally, the perforated plate is fixed to the curved muffler plate by rivets.
Optionally, the noise-reducing cotton is superfine glass silk floss.
Optionally, the low-resistance-loss curved plate muffler is mounted on the upper and lower walls of the inner side of the pipeline, each curved surface muffler plate is perpendicular to the upper and lower walls of the inner side of the pipeline, and each curved surface muffler plate is welded with the upper and lower walls of the inner side of the pipeline through a steel plate.
Optionally, the low-resistance-loss bent plate muffler is mounted on the left and right walls of the inner side of the pipeline, each curved surface muffler plate is perpendicular to the left and right walls of the inner side of the pipeline, and each curved surface muffler plate is welded with the left and right walls of the inner side of the pipeline through a steel plate.
Alternatively, the perforated plate is made of stainless steel material.
The low-resistance-loss bent plate muffler provided by the utility model has excellent pneumatic and acoustic characteristics. In the aspect of pneumatic performance, an air flow channel between the bent plate silencing plates is in a contracted-expanded shape, and the flow channel curve is carefully designed, so that the air flow pressure loss can be reduced as much as possible; in the aspect of acoustic performance, the bent plate muffler can effectively reduce the propagation of direct sound due to the bending of the airflow channel, increase the reflection times of sound waves in the airflow channel, improve the noise reduction performance of the muffler, and effectively reduce the high-frequency failure phenomenon of noise reduction in the conventional sheet muffler, thereby having better inhibition effect on the broadband noise of the fan.
The utility model has the advantages of larger sound attenuation and lower resistance loss coefficient, and meets the design requirement of the aero-acoustic wind tunnel.
Drawings
FIG. 1 is a schematic view of a low drag loss curved plate muffler according to an embodiment of the present utility model;
FIG. 2 is a top view of a low drag loss curved plate muffler provided by an embodiment of the present utility model;
FIG. 3 is a schematic view of a curved muffler structure according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of welding a curved muffler plate and an inner side of a pipe according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to specific embodiments and figures.
The present utility model provides a low resistance loss bent plate muffler, referring to fig. 1 and 2, comprising: a plurality of curved muffler plates 10 parallel to each other, and a gap exists between two adjacent curved muffler plates, preferably, the distance between two adjacent curved muffler plates 10 is 100-300 mm.
As shown in fig. 3, each curved muffler plate 10 has perforated plates 20 on both sides, which serve as supports and sound-transmitting. A soundproofing cotton 30 is filled between the two perforated plates 20.
Further, in another embodiment, the glass fiber cloth can be used for sewing the noise elimination cotton, the noise elimination cotton is wrapped by the glass fiber cloth, the service life of the noise elimination cotton sound absorption material can be prolonged, and flying dust of the noise elimination cotton sound absorption material after aging can be further prevented. The glass fiber cloth does not influence the sound absorption performance of the noise elimination cotton.
As shown in fig. 3, the curved muffler plate 10 and the perforated plate 20 may be fixed together by vertical beams 40, which are preferably perpendicular to the surfaces of the curved muffler plate 10 and the perforated plate 20.
In addition, the perforated plate can also be fixed on the curved surface muffler plate through rivets.
The utility model is mainly used for the air flow pipeline which needs low resistance loss and high sound attenuation, such as the aero-acoustic wind tunnel.
When the low-resistance-loss bent plate muffler is installed, the low-resistance-loss bent plate muffler can be installed on the upper wall and the lower wall of the inner side of a pipeline. For example, as shown in fig. 1, the low resistance loss curved plate muffler provided by the present utility model may include 12 curved muffler plates parallel to each other, each of which is perpendicular to the upper and lower walls inside the pipe 100. Each curved-surface muffler plate is welded to the upper and lower walls of the inside of the pipe 100 through a steel plate, the steel plate welded to the upper wall of the inside of the pipe is an upper top plate 200, and the steel plate welded to the lower wall of the inside of the pipe is a lower top plate 300, as shown in fig. 4; the distance between two adjacent curved surface silencing plates is 200mm.
As shown in fig. 3, each curved muffler plate 10 is provided with a stainless steel perforated plate 20 on both sides. A noise damping cotton 30, which is ultra fine glass silk floss, is filled between the two perforated plates 20.
In order to prolong the service life of the sound absorbing material of the sound absorbing cotton, further prevent flying dust after the sound absorbing material of the sound absorbing cotton ages, the superfine glass silk floss is sewed by adopting glass fiber cloth.
As shown in fig. 3, the vertical beams 40 are welded to the curved muffler plate 10 and the perforated plate 20, and the curved muffler plate 10 and the perforated plate 20 are fixed together by the vertical beams 40.
The number of the air flow channels of the low-resistance-loss bent plate muffler is 11, the overall flow rate of the low-resistance-loss bent plate muffler is about 75%, the silencing length is 5.5m, and the silencing length refers to the distance from the pipeline inlet A to the pipeline outlet B.
When the low-resistance-loss bent plate muffler is installed, the low-resistance-loss bent plate muffler can be installed on the left wall and the right wall of the inner side of a pipeline. The low resistance loss curved plate muffler provided by the utility model can comprise 12 mutually parallel curved surface muffler plates, wherein each curved surface muffler plate is perpendicular to the left wall and the right wall of the inner side of the pipeline, and each curved surface muffler plate is welded with the left wall and the right wall of the inner side of the pipeline through a steel plate. The distance between two adjacent curved surface silencing plates is 200mm. The two sides of each curved surface muffler plate are stainless steel perforated plates. And superfine glass silk floss is filled between the two perforated plates. The superfine glass fiber cotton is wrapped by glass fiber cloth to prolong the service life of the sound absorbing material of the sound absorbing cotton and further prevent flying dust after the sound absorbing material of the sound absorbing cotton is aged. The perforated plate is fixed on the curved surface silencing plate through rivets.
The foregoing has outlined rather broadly the more detailed description of the utility model in order that the detailed description thereof that follows may be better understood, and in order that the present utility model may be better understood. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. In addition, the utility model is not fully described in the conventional technology.
Claims (10)
1. A low drag loss curved plate muffler, comprising: a plurality of curved surface noise elimination boards that are parallel to each other, there is the clearance between two adjacent curved surface noise elimination boards, and the two sides of every curved surface noise elimination board are the perforated plate, and it is cotton to fill between two perforated plates to have the noise elimination.
2. The low drag loss curved plate muffler of claim 1, wherein,
the noise elimination cotton is wrapped by glass fiber cloth.
3. The low drag loss curved plate muffler of claim 1, wherein,
the distance between two adjacent curved surface silencing plates is 100-300 mm.
4. The low drag loss curved plate muffler of claim 1, wherein,
the curved surface silencing plate and the perforated plate are fixed together through a plurality of vertical beams.
5. The low drag loss curved plate muffler of claim 4, wherein,
the vertical beam is vertical to the surface of the curved surface silencing plate and the surface of the perforated plate.
6. The low drag loss bent-plate muffler according to claim 4 or 5, wherein,
the vertical beam is welded on the curved surface silencing plate and the perforated plate.
7. The low drag loss curved plate muffler of claim 1, wherein,
the perforated plate is fixed on the curved surface silencing plate through rivets.
8. The low drag loss curved plate muffler of claim 1, wherein,
the noise elimination cotton is superfine glass silk floss.
9. The low drag loss curved plate muffler of claim 1, wherein,
the low-resistance-loss bent plate muffler is arranged on the upper wall and the lower wall of the inner side of the pipeline, each bent plate muffler is perpendicular to the upper wall and the lower wall of the inner side of the pipeline, and each bent plate muffler is welded with the upper wall and the lower wall of the inner side of the pipeline through a steel plate.
10. The low drag loss curved plate muffler of claim 1, wherein,
the low-resistance-loss bent plate muffler is arranged on the left wall and the right wall of the inner side of the pipeline, each bent plate muffler is perpendicular to the left wall and the right wall of the inner side of the pipeline, and each bent plate muffler is welded with the left wall and the right wall of the inner side of the pipeline through a steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320612583.8U CN219916697U (en) | 2023-03-25 | 2023-03-25 | Low resistance loss bent plate muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320612583.8U CN219916697U (en) | 2023-03-25 | 2023-03-25 | Low resistance loss bent plate muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219916697U true CN219916697U (en) | 2023-10-27 |
Family
ID=88437838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320612583.8U Active CN219916697U (en) | 2023-03-25 | 2023-03-25 | Low resistance loss bent plate muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219916697U (en) |
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2023
- 2023-03-25 CN CN202320612583.8U patent/CN219916697U/en active Active
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