CN212587212U - Novel sheet type silencer - Google Patents
Novel sheet type silencer Download PDFInfo
- Publication number
- CN212587212U CN212587212U CN202020857898.5U CN202020857898U CN212587212U CN 212587212 U CN212587212 U CN 212587212U CN 202020857898 U CN202020857898 U CN 202020857898U CN 212587212 U CN212587212 U CN 212587212U
- Authority
- CN
- China
- Prior art keywords
- sound absorption
- shell
- plate
- perforated
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a novel sheet type silencer, which comprises a shell and a silencing sheet arranged in the shell, wherein both ends of the shell are provided with conical sealing heads, the shell is provided with an air inlet and an air outlet, the positions of the air inlet and the air outlet in the shell are respectively provided with an adjusting device, the silencing sheet comprises perforated sound absorption panels at both sides, the inner sides of the two perforated sound absorption panels are respectively provided with a micropore sound absorption plate, sound absorption materials are filled between the micropore sound absorption plates and the perforated sound absorption panels to manufacture a sound absorption layer, a partition plate is arranged between the two micropore sound absorption plates, and a cavity is formed between the partition plate, the micropore sound absorption plates and a shell of the silencing sheet; the adjusting device is symmetrically arranged on the inner wall of the conical sealing head and comprises a motor, a moving track is arranged on the inner wall of the conical sealing head, a threaded rod is arranged on the motor, and a moving plate is arranged in the moving track. The utility model discloses simple structure, the size that can control business turn over wind gap guarantees that the pipeline exhausts unblocked, the resistance is little, the suitability is strong, and noise elimination effect is good.
Description
Technical Field
The utility model relates to an air pipe noise elimination equipment field, concretely relates to novel piece formula silencer.
Background
Mufflers are effective devices for controlling the outward propagation of aerodynamic noise. It is a component of the piping system, and after internal acoustic treatment, it can reduce the propagation of noise and does not affect the air flow. In order to achieve the purpose of noise reduction, a silencer is generally required to be installed in a ventilating duct, whether the ventilating duct is large in air volume and strong in wind power and generates large noise in large ventilating ducts such as an aircraft engine test bed, an underground railway, a highway tunnel, an underground warehouse and a power station, or the ventilating duct is small in air volume and weak in wind power and generates small noise in a household ventilating system.
The conventional resistive sheet type muffler generally performs well in terms of medium-high frequency sound-deadening performance, but is less satisfactory in terms of low frequency sound-deadening performance, which is determined by the characteristics of the porous sound-absorbing material. Therefore, how to improve the existing sheet type silencer to enable the existing sheet type silencer to have good low-frequency sound absorption performance is a research direction of the existing silencer, and the size of the vent of the existing silencer is fixed, so that the existing silencer cannot be used in various silencing occasions, and the applicability is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a novel piece formula silencer, simple structure, the size that can control business turn over wind gap guarantees that the pipeline exhausts unblocked, the resistance is little, the suitability is strong, and noise elimination effect is good.
In order to solve the technical problem, the utility model provides a novel sheet type silencer, which comprises a shell and a silencing sheet arranged in the shell, wherein conical sealing heads are arranged at two ends of the shell, the shell is provided with an air inlet and an air outlet, adjusting devices are arranged at the positions of the air inlet and the air outlet in the shell, the silencing sheet comprises perforated sound absorption panels at two sides, microporous sound absorption plates are arranged at the inner sides of the two perforated sound absorption panels, sound absorption materials are filled between the microporous sound absorption plates and the perforated sound absorption panels to form sound absorption layers, a partition plate is arranged between the two microporous sound absorption plates, a cavity is formed between the partition plate, the microporous sound absorption plates and a shell of the silencing sheet, and the cavity is communicated with the outside only through holes in the microporous sound absorption plates; the adjusting device is symmetrically arranged on the inner wall of the conical sealing head and comprises a motor, a moving track is arranged on the inner wall of the conical sealing head, a threaded rod is arranged on the motor, a moving plate is arranged in the moving track, and an internal thread matched with the threaded rod is arranged on the moving plate.
Further, the perforated sound absorption panel is a perforated galvanized sheet material or a perforated aluminum sheet.
Further, the sound absorption layer is made of centrifugal glass wool.
Furthermore, a conical flow guide structure is arranged at a position, close to the air inlet, of the silencing piece, and comprises a windward portion and an inclined portion connected with the windward portion, and the inclined portion has a set inclination angle relative to the extending direction of the silencing piece.
Furthermore, an avoiding part is arranged at a position, close to the air outlet, of the silencing sheet, and the thickness of the avoiding part is smaller than that of the silencing sheet.
Further, the motor adopts a stepping motor.
The utility model has the advantages that: 1. the perforated sound absorption panel, the microporous sound absorption plate, the silencing material, the partition plate and the cavity are matched to form the silencing sheet, and the silencing sheet has excellent sound absorption performance in low, medium and high frequency sections;
2. the air inlet and the air outlet can be controlled by the adjusting device according to the air quantity, and the air inlet and the air outlet are wide in application range.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the silencing sheet of the present invention.
The reference numbers in the figures illustrate: 1. a housing; 2. a sound-deadening sheet; 21. a perforated sound absorbing panel; 22. a microporous acoustic panel; 23. a sound absorbing layer; 24. a partition plate; 25. a cavity; 3. a conical end enclosure; 4. an air inlet; 5. An air outlet; 6. a motor; 7. a threaded rod; 8. moving the plate; 9. a conical flow guide structure; 10. a windward portion; 11. an inclined portion; 12. an avoidance part.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1 to 2, an embodiment of the novel plate muffler of the present invention includes a housing 1 and a sound-absorbing plate 2 disposed in the housing 1, both ends of the housing 1 are provided with tapered end sockets 3, the housing 1 is provided with an air inlet 4 and an air outlet 5, the interior of the housing 1 is provided with adjusting devices at the positions of the air inlet 4 and the air outlet 5, the sound-absorbing plate 2 includes perforated sound-absorbing panels 21 at both sides, the inner sides of the two perforated sound-absorbing panels 21 are provided with microporous sound-absorbing panels 22, sound-absorbing layers 23 are formed by filling sound-absorbing materials between the microporous sound-absorbing panels 22 and the perforated sound-absorbing panels 21, a partition plate 24 is disposed between the two microporous sound-absorbing panels 22, a cavity 25 is formed between the partition plate 24, the microporous sound-absorbing panels 22 and the casing of the sound-absorbing plate 2, and the cavity 25 is communicated with the; the adjusting device is symmetrically arranged on the inner wall of the conical seal head 3 and comprises a motor 6, a moving track is arranged on the inner wall of the conical seal head 3, a threaded rod 7 is arranged on the motor 6, a moving plate 8 is arranged in the moving track, and an internal thread matched with the threaded rod 7 is arranged on the moving plate 8.
When the device is used, firstly, the adjusting device of the air inlet and outlet 5 is started, the two moving plates 8 are closed to block the air inlet and outlet 5 in an initial state, the distance between the two moving plates 8 is adjusted according to the air volume, the motor 6 is utilized to drive the threaded rod 7 to rotate, the rotating motion of the motor 6 can be changed into the linear motion of the moving plates 8 due to the threaded connection of the moving plates 8 and the threaded rod 7, the moving plates 8 are limited in the moving track, the distance between the two moving plates 8, namely the sizes of the air inlet 4 and the air outlet 5, can be adjusted through the motor 6, air flow enters from the air inlet 4 after the adjustment is finished, the inner sides of the two perforated sound absorption panels 21 are respectively provided with the microporous sound absorption plates 22, sound absorption materials are filled between the microporous sound absorption plates 22 and the perforated sound absorption panels 21 to manufacture sound absorption layers 23, form cavity 25 between micropore acoustic baffle 22 and the 2 shells of noise elimination piece, cavity 25 only communicates with the external world through the hole on the micropore acoustic baffle 22, and cavity 25 is as the back of the body chamber, and built-in micropore acoustic baffle 22, baffle 24 and the 2 shells of noise elimination piece form micropore resonance sound absorption structure jointly, have improved low frequency noise elimination performance to a certain extent, simultaneously again with the fixed sound absorbing material of micropore acoustic baffle 22 to can keep sound-absorbing layer 23, keep the good well high frequency noise elimination performance of traditional piece formula silencer resistance.
The perforated sound absorption panel 21 is a perforated galvanized plate or a perforated aluminum plate, and the sound absorption layer 23 is made of centrifugal glass wool, so that the sound absorption effect of the sound absorption sheet 2 can be improved as much as possible.
The conical flow guide structure 9 is arranged at the position, close to the air inlet 4, of the silencing piece 2, the conical flow guide structure 9 comprises a windward part 10 and an inclined part 11 connected with the windward part 10, the inclined part 11 has a set inclined angle relative to the extending direction of the silencing piece 2, and airflow enters an inner cavity of the shell from the air inlet 4 and first collides with a windward side; after the airflow collides with the windward side, the airflow rebounds to the inner wall of the shell, and after rebounding, the airflow continues to move towards the air outlet 5 between the side wall of the silencing piece 2 and the inner wall of the shell (or between the side wall of the other silencing piece 2); the air current collides with the inclined part 11, and after rebounding, the air current also continues to move towards the air outlet 5 between the side wall of the silencing piece 2 and the inner wall of the shell (or between the side wall of another silencing piece 2), so that the moving path of the air current is increased, although the action of the windward side is approximately the same as that of the inclined surface, the resistance of the air current entering the inner cavity of the silencer can be reduced by the inclined surface, the chip silencer is also suitable for occasions with small air flow, namely, is suitable for an air current output part with small power, and the application range is wider.
The position of the silencing piece 2 close to the air outlet 5 is provided with an avoiding part 12, the thickness of the avoiding part 12 is smaller than that of the silencing piece 2, the motor 6 adopts the stepping motor 6, and the control precision is high.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (6)
1. A novel sheet type silencer is characterized by comprising a shell and a silencing sheet arranged in the shell, wherein conical seal heads are arranged at two ends of the shell, the shell is provided with an air inlet and an air outlet, adjusting devices are arranged at positions of the air inlet and the air outlet in the shell, the silencing sheet comprises perforated sound absorption panels at two sides, microporous sound absorption plates are arranged at inner sides of the two perforated sound absorption panels, sound absorption materials are filled between the microporous sound absorption plates and the perforated sound absorption panels to manufacture sound absorption layers, partition plates are arranged between the two microporous sound absorption plates, cavities are formed among the partition plates, the microporous sound absorption plates and a silencing sheet shell, and the cavities are communicated with the outside only through holes in the microporous sound absorption plates;
the adjusting device is symmetrically arranged on the inner wall of the conical sealing head and comprises a motor, a moving track is arranged on the inner wall of the conical sealing head, a threaded rod is arranged on the motor, a moving plate is arranged in the moving track, and an internal thread matched with the threaded rod is arranged on the moving plate.
2. The new plate muffler of claim 1, wherein the perforated sound absorbing panel is a perforated galvanized sheet or a perforated aluminum sheet.
3. The new plate muffler of claim 1, wherein the sound absorbing layer is a centrifugal glass wool.
4. The novel plate muffler as claimed in claim 1, wherein the muffling plate is provided with a conical flow guiding structure near the air inlet, the conical flow guiding structure comprises a windward portion and an inclined portion connected to the windward portion, and the inclined portion has a predetermined inclination angle with respect to the extending direction of the muffling plate.
5. The novel plate muffler as claimed in claim 1, wherein the muffling plate is provided with an avoiding portion at a position close to the air outlet, and the thickness of the avoiding portion is smaller than that of the muffling plate.
6. The new plate muffler as claimed in claim 1, wherein the motor is a stepping motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857898.5U CN212587212U (en) | 2020-05-21 | 2020-05-21 | Novel sheet type silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857898.5U CN212587212U (en) | 2020-05-21 | 2020-05-21 | Novel sheet type silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212587212U true CN212587212U (en) | 2021-02-23 |
Family
ID=74642046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020857898.5U Active CN212587212U (en) | 2020-05-21 | 2020-05-21 | Novel sheet type silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212587212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192481A (en) * | 2021-04-29 | 2021-07-30 | 大连理工大学 | Coiled Helmholtz resonator for controlling low-frequency noise |
-
2020
- 2020-05-21 CN CN202020857898.5U patent/CN212587212U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192481A (en) * | 2021-04-29 | 2021-07-30 | 大连理工大学 | Coiled Helmholtz resonator for controlling low-frequency noise |
| CN113192481B (en) * | 2021-04-29 | 2023-11-24 | 大连理工大学 | Coiled Helmholtz resonator for low-frequency noise control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110595052B (en) | Silencer with adjustable and excellent performance adapting to air inlet parameters | |
| CN2921306Y (en) | Impedance composite noise silencer | |
| CN105351037A (en) | Small-hole high-frequency noise eliminator | |
| CN212587212U (en) | Novel sheet type silencer | |
| CN102691549A (en) | Impedance combined type silencer | |
| CN106401697B (en) | A kind of diesel generating set composite muffler | |
| CN207993473U (en) | A kind of micropunch complex muffler | |
| CN214741561U (en) | Sound attenuation structure, muffler and unmanned aerial vehicle based on super material of acoustics | |
| CN104088689A (en) | Straight pipe type silencer | |
| CN207634397U (en) | Ventilation silencer | |
| CN212360095U (en) | Noise elimination structure for air compressor | |
| CN206726756U (en) | A kind of Combined type muffler for being convenient for changing muffling unit | |
| CN210460820U (en) | Exhaust silencer for pneumatic applicator motor | |
| CN205330766U (en) | Aperture high frequency silencer | |
| CN201943779U (en) | Impedance compound silencer | |
| CN111677697A (en) | Motor sweeper fan silencing device | |
| CN204716362U (en) | Engineering machinery noise-reducing silencer | |
| CN111503410A (en) | Helmholtz type silencer | |
| CN113153825A (en) | A silencing device and fan for fan | |
| CN211342993U (en) | Self-silencing axial flow fan ventilation system for tunnel | |
| CN203925669U (en) | A kind of exhaust silencer for urban small automobile | |
| RU157128U1 (en) | COMBINED SILENCER OF AERODYNAMIC NOISE | |
| CN114215707A (en) | Noise eliminator and wind generating set | |
| CN219453255U (en) | Pipeline silencing tool | |
| CN206131784U (en) | Labyrinth silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |