CN212959302U - Cabinet type air inlet channel silencing device - Google Patents
Cabinet type air inlet channel silencing device Download PDFInfo
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- CN212959302U CN212959302U CN202021888315.1U CN202021888315U CN212959302U CN 212959302 U CN212959302 U CN 212959302U CN 202021888315 U CN202021888315 U CN 202021888315U CN 212959302 U CN212959302 U CN 212959302U
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Abstract
The utility model discloses a cabinet type air inlet channel noise eliminator, which belongs to the technical field of noise control and is used for being installed in an air inlet channel of a cabinet body, comprising a fixed support, a noise elimination unit and a mounting rack, wherein the fixed support fixes the noise elimination unit in the mounting rack side by side, and the mounting rack is integrally installed in the air inlet channel; the silencing unit is a composite structure formed by combining a sound absorption layer, a protective surface layer and a perforated plate, and a flow guide channel is arranged at the air inlet end of the silencing unit; the utility model discloses simple structure, easily preparation, maintenance simple to operate can be used to various types and model rack inlet air channel, can effectively eliminate the noise of aerodynamic nature noise, casing and the mechanical noise of bearing radiation, basic vibration radiation of rack air inlet.
Description
Technical Field
The utility model relates to a noise control field technical field, concretely relates to cabinet type inlet air channel noise eliminator.
Background
The cabinet type high-speed centrifugal fan, the compressor and the air compressor are widely applied to industries such as medicine, environmental protection, chemical engineering, petroleum and the like, the cabinet type structure is compact, convenient to install and high in integration, meanwhile, the cabinet type structure can isolate radiation noise of a machine body to a certain degree, but an air inlet channel ensures that air flow enters, aerodynamic noise radiation is large, noise of the machine body is large, noise energy values are high in medium and high frequency bands, and people are irritated and have abnormal pulse and heart; the existing cabinet type air inlet channel has high noise radiation energy level, the existing air inlet channel silencing device adopts a complex sound insulation plate structure, the flowing of air flow is seriously influenced, the air inlet area is large, an air inlet silencer cannot be designed, and the appearance and the space of a cabinet are seriously influenced by conventional silencing measures.
SUMMERY OF THE UTILITY MODEL
The technical purpose is as follows: to prior art at the not enough of cabinet type inlet air duct noise elimination existence, the utility model discloses a simple structure, noise elimination effect is good, dismantles convenient cabinet type inlet air duct noise eliminator.
The technical scheme is as follows: in order to achieve the technical purpose, the utility model adopts the following technical scheme:
a cabinet type air inlet channel silencing device is arranged at an air inlet channel inlet of a cabinet body and comprises silencing units, fixing supports and mounting racks, wherein the silencing units are arranged side by side; the silencing units are of a symmetrical structure and comprise a sound absorption layer positioned in the center, a protective layer on two sides of the sound absorption layer, a first perforated plate and a second perforated plate on the outer side of the protective layer, a first cavity layer is formed between the first perforated plate and the protective layer, a second cavity layer is formed between the first perforated plate and the second perforated plate, silencing channels are formed between the second perforated plates of adjacent silencing units, and the end parts of the silencing channels are provided with flow guide channels for guiding gas to enter; the two layers of perforated plates are combined, so that the sound absorption frequency is effectively widened, the silencing frequency band is wide, and the noise-absorbing sound-absorbing device is well suitable for wide-band noise of a fan, an air compressor, a compressor and the like.
The air inlet direction of the flow guide channel is vertical to the flow guide channel and is fixed at the end part of the silencing channel; the flow guide channel is formed by two arc-shaped flow guide sheets and comprises a first arc-shaped flow guide sheet and a second arc-shaped flow guide sheet; the two arc-shaped flow deflectors are respectively fixed at the end parts of the second perforated plates of the adjacent silencing units; the arc-shaped flow deflector optimizes the inflow conditions of the inlet, reduces airflow disorder and effectively reduces the regenerative noise of the airflow, the air inlet direction is vertical to the flow guide channel, so that the sound waves are bent, and the medium-high frequency noise elimination effect is improved; the inside airfoil water conservancy diversion piece that sets up of water conservancy diversion passageway separates water conservancy diversion passageway entry position into two passageways that path width is the same, makes and admits air more gently, reduces the air current noise from the import.
The silencing unit is fixedly arranged in the mounting frame through a fixed support, the fixed support is of a groove-shaped structure, is fixedly arranged at the upper end and the lower end of the silencing unit and is detachably connected with the silencing unit, and the bottom of the fixed support is fixedly connected with the mounting frame; the air inlet channel of the cabinet body is wholly arranged in the mounting frame, the silencing units are arranged in a modularized mode, integral disassembly and partial maintenance are facilitated, and cost is saved.
Preferably, the first arc-shaped flow deflector comprises two arc-shaped structures which are respectively a first arc-shaped section and a second arc-shaped section, the first arc-shaped section protrudes outwards along the flow guide channel, the second arc-shaped section is recessed inwards along the flow guide channel, one end of the second arc-shaped section is in arc transition with the first arc-shaped section, and the other end of the second arc-shaped section is fixedly connected with the noise elimination unit; the shape of the second arc-shaped guide vane is an arc which is concave inwards along the guide channel.
Preferably, the airfoil water conservancy diversion piece adopts the arc shape, including first spacer of both ends laminating and second spacer, wherein first spacer radian radius is less than the second spacer, and first spacer is located and is close to first arc water conservancy diversion piece one side in the water conservancy diversion passageway, and cross-section route continuous variation through the water conservancy diversion passageway reduces the air current and hinders and decreases, does not influence the efficiency of admitting air, makes the more equipartition that admits air, from the source control noise of admitting air.
Preferably, the distance of the air inlet of the flow guide channel is 25-100 mm, the distance of the narrowest position is 10-50 mm, the radius of the arc of the first arc section is 20-50 mm, the radius of the arc of the second arc section is 10-50 mm, and the radius of the arc of the second arc-shaped flow guide sheet is 15-45 mm.
Preferably, the maximum hollow distance of the airfoil flow deflector is 10-20 mm, the radian radius of the first spacer is 5-30 mm, the radian radius of the second spacer is 10-35 mm, and the arc height of the first spacer is 5-15 mm.
Preferably, the outer surface of the mounting frame is made of an elastic material and is tightly attached to the inner surface of the cabinet body, so that gas is prevented from entering the cabinet body through a fit clearance and affecting the noise elimination effect.
Preferably, the sound absorption layer is made of superfine glass wool or polyurethane foam plastic, preferably superfine glass wool, the thickness of the sound absorption layer is 20-150 mm, and the volume weight of the sound absorption layer is 20kg/m3~50 kg/m3The water content is 0.2% -3%, the mass moisture absorption rate is 2% -8%, and the hydrophobic rate is not less than 98%; and the flow resistance is proper, the pores are uniform, and the sound absorption performance and the chemical stability are higher.
Preferably, the protective layer is made of one of glass fiber cloth, non-woven fabric or film, preferably glass fiber cloth; first perforated plate and second perforated plate adopt aluminum alloy or galvanized sheet, preferred galvanized sheet, and the aperture is 0.1~10mm, and the hole interval is 1~30mm, and perforated plate thickness is 0.2~5mm, and the perforation rate is 5% ~40%, the use of perforated plate and veil, well, low frequency acoustic absorption coefficient can improve to some extent, has constituted a compound sound absorbing structure, the low frequency pulsation noise of effective absorption intake.
Preferably, the thickness of the first cavity layer is 10-80 mm, the thickness of the second cavity layer is 5-100 mm, and the double-layer cavity is arranged, so that the noise elimination frequency band is widened by utilizing airflow resonance, and the noise elimination of various cabinet type fans is effectively adapted.
The utility model discloses during the use, according to cabinet body shape, the noise elimination unit of installation suitable size and quantity constitutes noise eliminator that admits air, fixes in cabinet body inlet air channel, and the air current passes through the water conservancy diversion passageway and gets into the noise elimination passageway, after the noise elimination of noise elimination unit, gets into the internal portion of cabinet.
Has the advantages that: the utility model optimizes the gas inflow condition and further reduces the air flow regeneration noise through the flow guide channel formed by the arc-shaped flow guide sheet; the double-layer cavity is arranged, so that the noise elimination frequency band is widened, the noise elimination device is well suitable for wide-band noise of a fan, an air compressor, a compressor and the like, and the application range is wide; the perforated plate, the facing layer and the sound absorption layer form a composite sound absorption structure, so that the noises of low, medium and high frequency bands are effectively eliminated, the silencing frequency band is wide, and the high-frequency failure frequency of a silencing channel is high; the modularized design can be integrally disassembled or partially replaced, the operation is simple and convenient, and the cost is saved.
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 installed in a cabinet type air intake duct;
FIG. 2 is a sectional view of the present invention installed in a cabinet type air intake duct;
fig. 3 is a perspective view of the noise elimination unit of the present invention;
FIG. 4 is a partial enlarged view of the muffler unit of the present invention;
fig. 5 is a plan view of a perforated plate according to the present invention;
FIG. 6 is an enlarged view of the diversion channel of the present invention;
the device comprises a cabinet body 1, a fixed support 2, a silencing unit 3, a flow guide channel 4, a mounting frame 5, a silencing channel 6 and an airfoil flow deflector 7; 301-sound absorbing layer, 302-armor layer, 303-first cavity layer, 304-first perforated plate, 305-second perforated plate, 306-second cavity layer, 401-first arc-shaped flow deflector, 402-second arc-shaped flow deflector, 403-first arc section, 404-second arc section, 701-first spacer, 702-second spacer.
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, which are not intended to limit the scope of the invention as described herein.
As shown in fig. 1, fig. 2 is the utility model provides a cabinet type air inlet channel noise eliminator, install in the air inlet channel of the cabinet body 1, including fixed bolster 2, noise elimination unit 3 and mounting bracket 5, noise elimination unit 3 passes through fixed bolster 2 to be fixed side by side in mounting bracket 5, form noise elimination passageway 6 between the adjacent noise elimination unit 3, the 6 tip of noise elimination passageway sets up the water conservancy diversion passageway 4 that the guide gas got into, elastic material is adopted to 5 surfaces of mounting bracket, and closely laminate with 1 internal surface of the cabinet body, make the air current only get into the cabinet body through noise elimination passageway 6, mounting bracket 5 can make the whole installation of dismantling of noise eliminator, be convenient for maintain.
The fixed support 2 adopts a groove structure, is positioned at the upper end and the lower end of the silencing unit 3, is fixedly connected with the mounting frame 5 at the bottom, and the silencing unit 3 is clamped between the two fixed supports 2 through the mounting grooves of the fixed support 2, so that the replacement and the maintenance are convenient, and the maintenance cost is saved.
As shown in fig. 2 and 6, the flow guide channel 4 is composed of a first arc-shaped flow guide plate 401 and a second arc-shaped flow guide plate 402 on the outer side, the air inlet direction of the flow guide channel 4 is perpendicular to the channel direction of the flow guide channel 4, the width of the inlet path is 25-100 mm, and the inside of the flow guide channel 4 is provided with an airfoil-shaped flow guide plate 7 for separation.
The first arc-shaped flow deflector 401 comprises two sections of arc structures, namely a first arc section 403 and a second arc section 404, the first arc section 403 protrudes outwards along the flow guide channel 4, the arc radius is 20-50 mm, the second arc section 404 is recessed inwards along the flow guide channel 4, one end of the second arc section is in arc transition with the first arc section 403, the other end of the second arc section is fixedly connected with the noise elimination unit 3, and the arc radius is 15-35 mm; the shape of the second arc-shaped guide vane 402 is an arc which is concave along the guide channel 4, and the radius of the arc is 15-45 mm.
Wing section water conservancy diversion piece 7 adopts circular arc shape's hollow structure, including both ends laminating first spacer 701 and second spacer 702, wherein first spacer 701 radian radius is less than second spacer 702, and first spacer 701 is located and is close to first arc water conservancy diversion piece 401 one side in water conservancy diversion passageway 4, and the biggest hollow distance of wing section water conservancy diversion piece is 10~20mm, and first spacer radian radius is 5~30mm, and second spacer radian radius is 10~35mm, first spacer circular arc height is 5~15 mm.
As shown in fig. 3 and 4, the silencing unit 3 is a symmetrical structure, and includes a sound absorbing layer 301, a facing layer 302 and a double-layer perforated plate, where the facing layer 302 is located on both sides of the sound absorbing layer 301 and used for compressing the sound absorbing layer 301; double-deck perforated plate is located the both sides of armour layer 302, and from interior to exterior is first perforated plate 304 and second perforated plate 305 in proper order, and double-deck perforated plate has effectively widened the sound absorption frequency, and the noise elimination frequency band is wide, has adapted to broadband noise such as fan, air compressor machine, compressor well.
The sound absorption layer 301 is made of superfine glass wool or polyurethane foam plastic, preferably superfine glass wool, the thickness is 20-150 mm, the volume weight is 20kg/m 3-50 kg/m3, the water content is 0.2% -3%, the mass moisture absorption rate is 2% -8%, and the hydrophobic rate is not less than 98%.
The protective layer 302 is made of one of glass fiber cloth, non-woven fabric or thin film, a first cavity layer 303 is formed between the first perforated plate 304 and the protective layer 302, and the thickness of the first cavity layer 303 is 10-80 mm; a second cavity layer 306 is formed between the first perforated plate 304 and the second perforated plate 305, and the thickness of the second cavity layer 306 is 5-100 mm.
As shown in FIG. 5, the first perforated plate 304 and the second perforated plate 305 are made of materials including but not limited to aluminum alloy or galvanized plate, preferably galvanized plate, the hole diameter is 0.1 mm-10 mm, the hole pitch is 1 mm-30 mm, and the plate thickness is 0.2 mm-5 mm, preferably 0.3 mm. The perforation rate is 5% -40%.
The utility model provides a cabinet type inlet air channel noise eliminator, through 5 integral mountings of mounting bracket in 1 inlet air channel of the cabinet body, 5 surfaces of mounting bracket and inlet air channel laminating, the gas water conservancy diversion passageway 4 that constitutes through arc water conservancy diversion piece 401 gets into noise elimination passageway 6, and noise elimination unit 3 through 6 both sides of noise elimination passageway falls the noise elimination of making an uproar admitting air, and final gas gets into the internal portion of cabinet.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (9)
1. The utility model provides a cabinet type inlet air channel noise eliminator, fixes the inlet air channel entrance at the cabinet body (1), its characterized in that: comprises a silencing unit (3), a fixed support (2) and a mounting rack (5); the silencing unit (3) is fixed inside the mounting rack (5) through the fixing support (2), and the mounting rack (5) is integrally fixed at the inlet of an air inlet channel of the cabinet body (1);
a silencing channel (6) is formed between the adjacent silencing units (3), and a flow guide channel (4) for guiding gas to enter is arranged at the end part of the silencing channel (6).
2. The cabinet type air inlet channel silencing device of claim 1, wherein: the flow guide channel (4) is composed of a first arc-shaped flow guide piece (401) and a second arc-shaped flow guide piece (402) on the outer side, the air inlet direction of the flow guide channel (4) is perpendicular to the channel direction of the flow guide channel (4), and an airfoil-shaped flow guide piece (7) for separation is arranged inside the flow guide channel (4).
3. The cabinet type air inlet channel silencing device of claim 2, wherein: the first arc-shaped flow deflector (401) comprises two sections of arc structures, namely a first arc section (403) and a second arc section (404), wherein the first arc section (403) protrudes outwards along the flow guide channel (4), the second arc section (404) is recessed inwards along the flow guide channel (4), one end of the second arc section is in arc transition with the first arc section (403), and the other end of the second arc section is fixedly connected with the noise elimination unit (3); the shape of the second arc-shaped guide vane (402) adopts an arc which is concave along the guide channel (4);
the wing section water conservancy diversion piece (7) adopt the circular arc shape, including both ends laminating first spacer (701) and second spacer (702), wherein first spacer (701) radian radius is less than second spacer (702), and first spacer (701) are located and are close to first arc water conservancy diversion piece (401) one side in water conservancy diversion passageway (4).
4. The cabinet type air inlet channel silencing device of claim 1, wherein: the silencing unit (3) is of a symmetrical structure and comprises a sound absorption layer (301) in the center, a facing layer (302) located on two sides of the sound absorption layer (301) and used for pressing the sound absorption layer (301), a first perforated plate (304) and a second perforated plate (305) located on the outermost side of the silencing unit (3), a first cavity layer (303) is formed between the first perforated plate (304) and the facing layer (302), and a second cavity layer (306) is formed between the first perforated plate (304) and the second perforated plate (305).
5. The cabinet type air inlet channel silencing device of claim 4, wherein: the noise elimination unit (3) is installed side by side inside the installation frame (5), the fixed support (2) adopts a groove structure and is installed at the upper end and the lower end of the noise elimination unit (3), and the bottom of the fixed support (2) is fixedly connected with the installation frame (5).
6. The cabinet type air inlet channel silencing device of claim 4, wherein: the sound absorption layer (301) is made of superfine glass wool or polyurethane foam plastic, and the thickness of the sound absorption layer is 20mm
150mm, 0.2-3% of water content and 20kg/m of volume weight3 
50 kg/m3Mass moisture absorption rate of 2%
The 8 percent hydrophobic rate is more than or equal to 98 percent.
7. The cabinet type air inlet channel silencing device of claim 4, wherein: the protective layer (302) is made of one of glass fiber cloth, non-woven fabrics and thin films, the thickness of the first cavity layer (303) is 10-80 mm, and the thickness of the second cavity layer (306) is 5-100 mm.
8. The cabinet type air inlet channel silencing device of claim 4, wherein: the first perforated plate (304) and the second perforated plate (305) are made of aluminum alloy or galvanized plates, the aperture is 0.1-10 mm, the hole spacing is 1-30 mm, and the perforation rate is 5% -40%.
9. The cabinet type air inlet channel silencing device of claim 1, wherein: the outer surface of the mounting frame (5) is made of elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021888315.1U CN212959302U (en) | 2020-09-02 | 2020-09-02 | Cabinet type air inlet channel silencing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021888315.1U CN212959302U (en) | 2020-09-02 | 2020-09-02 | Cabinet type air inlet channel silencing device |
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| Publication Number | Publication Date |
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| CN212959302U true CN212959302U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021888315.1U Active CN212959302U (en) | 2020-09-02 | 2020-09-02 | Cabinet type air inlet channel silencing device |
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| CN (1) | CN212959302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474934A (en) * | 2022-03-01 | 2022-05-13 | 合肥华聚微科新材料有限责任公司 | Supercritical foaming micro-nano hole lightweight composite board capable of being used for plastic uptake and preparation process thereof |
-
2020
- 2020-09-02 CN CN202021888315.1U patent/CN212959302U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474934A (en) * | 2022-03-01 | 2022-05-13 | 合肥华聚微科新材料有限责任公司 | Supercritical foaming micro-nano hole lightweight composite board capable of being used for plastic uptake and preparation process thereof |
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