CN216478060U - Noise reduction cabinet for high-speed centrifugal fan - Google Patents
Noise reduction cabinet for high-speed centrifugal fan Download PDFInfo
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- CN216478060U CN216478060U CN202122656649.7U CN202122656649U CN216478060U CN 216478060 U CN216478060 U CN 216478060U CN 202122656649 U CN202122656649 U CN 202122656649U CN 216478060 U CN216478060 U CN 216478060U
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Abstract
The utility model discloses a noise reduction cabinet for a high-speed centrifugal fan, which comprises a cabinet body, wherein an air inlet chamber, a main machine chamber and an electric control chamber are arranged on the cabinet body, a main machine is arranged in the main machine chamber, control equipment for controlling the operation of the main machine is arranged in the electric control chamber, the air inlet chamber is communicated with the main machine chamber, and a baffling and noise reduction assembly is arranged in the air inlet chamber along the air inlet direction; the baffling and silencing assembly comprises a plurality of sound insulation baffles which are sequentially arranged along the vertical direction and the air inlet direction, the adjacent sound insulation baffles are vertically staggered with each other, and a passage for air circulation is formed at the staggered position; the utility model effectively eliminates the noise of the air inlet flow by the baffling type resistive silencing design, has wide silencing frequency band, effectively reduces the air flow noise of the air inlet channel, solves the coincidence effect, has high sound insulation and avoids sound insulation and sound leakage.
Description
Technical Field
The utility model relates to the technical field of air intake noise elimination, in particular to a noise reduction cabinet for a high-speed centrifugal fan.
Background
The high-speed centrifugal fan is widely applied to the industrial field, but the high-speed centrifugal fan has high rotating speed, wide noise frequency band and high noise level, so that the noise pollution problem exists in practical application, and the noise of the whole machine is higher than the industrial noise limit value due to the wide-frequency characteristic of the rotating noise of the main machine caused by the inlet and exhaust pulsation noise.
The air inlet channel of the existing cabinet body has a single structure, has no noise elimination function, and has the problem of airflow noise amplification with structural irrationality. The cabinet body has a single structure, large sound insulation amount and high trafficability characteristic, and can cause serious noise leakage at a certain frequency, so that the whole noise level is high.
SUMMERY OF THE UTILITY MODEL
The technical purpose is as follows: the utility model discloses a noise reduction cabinet for a high-speed centrifugal fan, which effectively reduces the airflow noise of an air inlet channel and aims to overcome the defects of single structure, high air inlet noise and lack of noise elimination function of the existing centrifugal fan cabinet body.
The technical scheme is as follows: in order to achieve the technical purpose, the utility model adopts the following technical scheme:
a noise reduction cabinet for a high-speed centrifugal fan comprises a cabinet body, wherein an air inlet chamber, a main machine chamber and an electric control chamber are arranged on the cabinet body, a main machine is arranged in the main machine chamber, control equipment for controlling the operation of the main machine is arranged in the electric control chamber, the air inlet chamber is communicated with the main machine chamber, and a baffling and silencing assembly is arranged in the air inlet chamber along the air inlet direction; baffling amortization subassembly includes along perpendicular and a plurality of sound-proof baffle that the direction set gradually that admits air, staggers each other in the vertical between the adjacent sound-proof baffle, forms the route of circulation of air in crisscross position.
Preferably, the sound insulation baffle of the utility model adopts a double-layer perforated plate composite sound insulation structure, and comprises a sound absorption layer positioned in the center and double-layer perforated plates symmetrically arranged on two sides of the sound absorption layer, wherein a gap is arranged between the two perforated plates forming the double-layer perforated plates to form a sound absorption cavity.
Preferably, the sound absorption layer is wrapped with a facing layer, a damping sound insulation layer is arranged between the facing layer and the double-layer perforated plate, and the inner side surface of the double-layer perforated plate is attached to the damping sound insulation layer.
Preferably, the double-layer perforated plate is made of aluminum alloy or galvanized plate.
Preferably, the double-layer perforated plate comprises a first perforated plate positioned on the outer side and a second perforated plate positioned on the inner side, the aperture of the first perforated plate is 0.1-15 mm, and the perforation rate is 1-10%; the aperture of the second perforated plate is 0.5 mm-10 mm, and the perforation rate is 0.5% -15%; the thickness of the sound absorption cavity is 5mm-80 mm.
Preferably, the material of the facing layer of the present invention is glass fiber cloth, non-woven fabric or film.
Preferably, the material of the sound absorption layer of the present invention adopts ultra-fine glass wool or polyurethane foam.
Preferably, the sound absorption layer has the thickness of 25 mm-100 mm and the volume weight of 20kg/m3~50 kg/m3The moisture content is 0.2% -3%, the mass moisture absorption rate is 2% -8%, and the hydrophobic rate is more than or equal to 98%.
Preferably, the air inlet filter is arranged at the front end of the baffling and silencing assembly.
Preferably, the sound-insulating baffle of the utility model is divided into a first sound-insulating baffle, a second sound-insulating baffle and a third sound-insulating baffle which are sequentially arranged along the air inlet direction, the top of the first sound-insulating baffle is fixed with the upper surface of the air inlet chamber of the cabinet body, a support plate is horizontally arranged below the second sound-insulating baffle, the support plate fixes the second sound-insulating baffle, the top of the third sound-insulating baffle is fixedly connected with the cabinet body, an air inlet channel is formed between the lower end of the first sound-insulating baffle and the support plate, between the upper end of the second sound-insulating baffle and the top plate of the top of the air inlet chamber, and between the lower end of the third sound-insulating baffle and the bottom of the air inlet chamber, and air can flow in a broken line to silence among the three sound-insulating baffles.
Has the advantages that: the noise reduction cabinet for the high-speed centrifugal fan provided by the utility model has the following beneficial effects:
1. the utility model effectively eliminates the noise of the air inlet flow and simultaneously effectively reduces the outward radiation noise of the main engine room through the baffling type resistive silencing channel formed by the sound-proof baffle plates.
2. The double-layer perforated plate composite sound insulation structure has good sound absorption performance for medium-high frequency noise, and effectively avoids the coincidence effect of sound insulation.
3. The second perforated plate is tightly attached to the damping sound insulation layer, so that the airflow vibration is effectively reduced, the sound insulation quantity is improved, and the protective surface layer wraps the sound absorption layer, so that the broadband noise radiated outwards by the host room is effectively absorbed.
4. The utility model has simple structure, can be assembled quickly, and effectively reduces the noise of the whole machine to the noise of the air inlet flow by air inlet noise elimination and cabinet sound insulation. The method has good noise reduction effect on the medium and high frequency band noise.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the cabinet of the present invention taken along the direction of air intake;
FIG. 3 is a structural view of the acoustic baffle of the present invention;
the air conditioner comprises a cabinet body 1, an air inlet chamber 2, a host chamber 3, an electric control chamber 4, a host 5, a sound absorption layer 6, a double-layer perforated plate 7, a protective surface layer 8, a damping sound insulation layer 9, an air inlet filter 10, a first sound insulation baffle 11, a second sound insulation baffle 12, a third sound insulation baffle 13, a support plate 14 and an exhaust blow-down pipe 15.
Detailed Description
The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, without thereby limiting the scope of the utility model to the described embodiment.
As shown in fig. 1 and 2, the noise reduction cabinet for a high-speed centrifugal fan disclosed by the present invention comprises a cabinet body 1, wherein an air inlet chamber 2, a main machine chamber 3 and an electric control chamber 4 are arranged on the cabinet body 1, a main machine 5 is arranged in the main machine chamber 3, a control device for controlling the operation of the main machine is arranged in the electric control chamber 4, the air inlet chamber 2 is communicated with the main machine chamber 3, and a baffling noise reduction assembly is arranged in the air inlet chamber 2 along an air inlet direction; baffling amortization subassembly includes along perpendicular and a plurality of sound-proof baffle that the direction set gradually that admits air, staggers each other in the vertical between the adjacent sound-proof baffle, forms the route of circulation of air in crisscross position.
The sound insulation baffle of the utility model is divided into a first sound insulation baffle 11, a second sound insulation baffle 12 and a third sound insulation baffle 13 which are arranged in sequence along the air inlet direction, the top of the first sound insulation baffle 11 is fixed with the upper surface of the air inlet chamber 2 of the cabinet body, a supporting plate 14 is horizontally arranged below the second sound-proof baffle plate 12, the second sound-proof baffle plate 12 is fixed by the supporting plate 14, the top of the third sound-proof baffle plate 13 is fixedly connected with the cabinet body 1, an air inlet channel is formed between the lower end of the first sound-proof baffle plate 11 and the support plate 14, between the upper end of the second sound-proof baffle plate 12 and the top plate at the top of the air inlet chamber, and between the lower end of the third sound-proof baffle plate 13 and the bottom of the air inlet chamber, air flows among the three sound-proof baffle plates in a broken line manner to be silenced, and finally enters the main machine chamber 3 through the air inlet channel below the third sound-proof baffle plate 13, an exhaust vent pipe 15 is arranged at the top of the main machine chamber 3, and gas is compressed by a high-speed centrifugal fan to do work and then is exhausted from the exhaust vent pipe 15.
In order to improve the silencing effect and meet the silencing requirements of different frequency bands, the sound insulation baffle adopts a double-layer perforated plate composite sound insulation structure, and comprises a sound absorption layer 6 positioned in the center and double-layer perforated plates 7 symmetrically arranged on two sides of the sound absorption layer, a gap is arranged between the two perforated plates forming the double-layer perforated plates to form a sound absorption cavity, and the sound absorption bandwidth is effectively widened by the sound absorption structure of the double-layer perforated plates.
According to the utility model, the protective layer 8 is wrapped outside the sound absorption layer 6, so that broadband noise radiated outwards by a main engine room is effectively absorbed; a damping sound insulation layer 9 is arranged between the protective layer 8 and the double-layer perforated plate 7, and the inner side surface of the double-layer perforated plate 7 is tightly attached to the damping sound insulation layer 9, so that the airflow vibration is effectively reduced, and the sound insulation quantity is improved.
The double-layer perforated plate 7 is made of aluminum alloy or galvanized plate, the double-layer perforated plate 7 comprises a first perforated plate positioned on the outer side and a second perforated plate positioned on the inner side, and the aperture of the first perforated plate is 0.1-15 mm, preferably 0.2 mm; the perforation rate is 1% -10%, and the preferable rate is 3%; the aperture of the second perforated plate is 0.5 mm-10 mm, preferably 1 mm; the perforation rate is 0.5% -15%, and the preferable rate is 3%; the sound-absorbing cavity has a thickness of 5mm to 80mm, preferably 10 mm.
The material of the protective layer 8 comprises but is not limited to glass fiber cloth, non-woven fabric or film, the material of the sound absorption layer 6 comprises but is not limited to superfine glass wool or polyurethane foam plastic, and the thickness of the sound absorption layer 6 is 25 mm-100 mm, preferably 55 mm; the volume weight is 20kg/m3~50 kg/m3Preferably 36 kg/m3Contains; the water rate is 0.2% -3%, and the water rate is preferably 0.8%; the mass moisture absorption rate is 2% -8%, and the preference is 3.5%; the hydrophobic rate is more than or equal to 98 percent, the flow resistance is proper, the pores are uniform, and the sound absorption performance and the chemical stability are higher.
When the utility model is used, air eliminates airflow noise through the baffling type air inlet silencing passage, enters the main machine room 3 from the air inlet passage below the third sound-proof baffle 13, is compressed by the high-speed centrifugal fan to do work, and is discharged from the exhaust emptying section 15.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.
Claims (10)
1. A noise reduction cabinet for a high-speed centrifugal fan is characterized by comprising a cabinet body (1), wherein an air inlet chamber (2), a main machine chamber (3) and an electric control chamber (4) are arranged on the cabinet body (1), a main machine (5) is arranged in the main machine chamber (3), control equipment for controlling the operation of the main machine is arranged in the electric control chamber (4), the air inlet chamber (2) is communicated with the main machine chamber (3), and a baffling and silencing assembly is arranged in the air inlet chamber (2) along the air inlet direction; baffling amortization subassembly includes along perpendicular and a plurality of sound-proof baffle that the direction set gradually that admits air, staggers each other in the vertical between the adjacent sound-proof baffle, forms the route of circulation of air in crisscross position.
2. The cabinet of claim 1, wherein the baffle adopts a double-layer perforated plate composite sound insulation structure, and comprises a sound absorption layer (6) in the center and double-layer perforated plates (7) symmetrically arranged on two sides of the sound absorption layer, and a gap is arranged between the two perforated plates forming the double-layer perforated plates to form a sound absorption cavity.
3. The noise reduction cabinet for the high-speed centrifugal fan is characterized in that a facing layer (8) wraps the outside of the sound absorption layer (6), a damping sound insulation layer (9) is arranged between the facing layer (8) and the double-layer perforated plate (7), and the inner side surface of the double-layer perforated plate (7) is attached to the damping sound insulation layer (9).
4. The noise reduction cabinet for the high-speed centrifugal fan as claimed in claim 3, wherein the double-layer perforated plate (7) is made of aluminum alloy or galvanized plate.
5. The noise reduction cabinet for the high-speed centrifugal fan is characterized in that the double-layer perforated plate (7) comprises a first perforated plate and a second perforated plate, wherein the first perforated plate is located on the outer side, the hole diameter of the first perforated plate is 0.1-15 mm, and the perforation rate is 1% -10%; the aperture of the second perforated plate is 0.5 mm-10 mm, and the perforation rate is 0.5% -15%; the thickness of the sound absorption cavity is 5mm-80 mm.
6. A noise reduction cabinet for a high-speed centrifugal fan according to claim 3, characterized in that the material of the facing layer (8) is glass fiber cloth, non-woven fabric or film.
7. The noise reduction cabinet for the high-speed centrifugal fan is characterized in that the sound absorption layer (6) is made of superfine glass wool or polyurethane foam.
8. A noise reduction cabinet for a high-speed centrifugal fan according to claim 7, characterized in that the sound absorption layer (6) has a thickness of 25 mm-100 mm and a volume weight of 20kg/m3~50 kg/m3The moisture content is 0.2% -3%, the mass moisture absorption rate is 2% -8%, and the hydrophobic rate is more than or equal to 98%.
9. A noise reduction cabinet for high-speed centrifugal fan according to claim 1, characterized in that the inlet air filter (10) is arranged at the front end of the baffle silencing assembly.
10. A noise reducing cabinet for a high speed centrifugal fan according to claim 1, the sound insulation baffle is divided into a first sound insulation baffle (11), a second sound insulation baffle (12) and a third sound insulation baffle (13) which are sequentially arranged along the air inlet direction, the top of the first sound insulation baffle (11) is fixed with the upper surface of the air inlet chamber (2) of the cabinet body, a supporting plate (14) is horizontally arranged below the second sound-insulating baffle (12), the second sound-insulating baffle (12) is fixed by the supporting plate (14), the top of the third sound-insulating baffle (13) is fixedly connected with the cabinet body (1), an air inlet channel is formed between the lower end of the first sound-proof baffle (11) and the support plate (14), between the upper end of the second sound-proof baffle (12) and the top plate at the top of the air inlet chamber, and between the lower end of the third sound-proof baffle (13) and the bottom of the air inlet chamber, and air flows in a broken line among the three sound-proof baffles to be silenced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122656649.7U CN216478060U (en) | 2021-11-02 | 2021-11-02 | Noise reduction cabinet for high-speed centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122656649.7U CN216478060U (en) | 2021-11-02 | 2021-11-02 | Noise reduction cabinet for high-speed centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216478060U true CN216478060U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122656649.7U Active CN216478060U (en) | 2021-11-02 | 2021-11-02 | Noise reduction cabinet for high-speed centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216478060U (en) |
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2021
- 2021-11-02 CN CN202122656649.7U patent/CN216478060U/en active Active
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