CN215370298U - Axial fan noise reduction device - Google Patents
Axial fan noise reduction device Download PDFInfo
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- CN215370298U CN215370298U CN202121062444.XU CN202121062444U CN215370298U CN 215370298 U CN215370298 U CN 215370298U CN 202121062444 U CN202121062444 U CN 202121062444U CN 215370298 U CN215370298 U CN 215370298U
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Abstract
The utility model discloses an axial flow fan noise reduction device which comprises a support hanger, an axial flow fan body and a noise reduction structure, wherein the support hanger comprises a first support hanger and a second support hanger, the axial flow fan body is arranged on the second support hanger, the noise reduction structure coats the axial flow fan body, the noise reduction structure is arranged on the first support hanger, and the noise reduction structure is of a multilayer structure. The utility model has the advantages that: the device has three layers, and each layer has a noise reduction function. The first layer from inside to outside is a closed-cell foam plastic layer, the main noise reduction functional section, and the thickness of the main noise reduction functional section is determined according to the noise reduction requirement, so that the effect of basically meeting the noise reduction is achieved; the second layer is a hard fiberboard layer, and plays a role in reinforcing to ensure the service life of the device while reducing noise; the third layer of material is a galvanized steel sheet layer, and after decorative effects such as spray painting and the like are used, the device is more attractive to install and is suitable for various installation places.
Description
Technical Field
The utility model relates to the technical field of axial flow fans, in particular to a noise reduction device of an axial flow fan.
Background
The axial flow fan is simple and convenient to mount and wide in use range, and the operation noise range is approximately 55-75dB (A). When a general axial flow fan is installed, pipeline type silencers are arranged in front of and behind an air pipe, and have a good silencing effect on aerodynamic noise in the air pipe. However, the axial flow fan installed in a region with a person or nearby generates noise by being transmitted and vibrated outwards through the fan casing, which causes serious influence on the psychology of the person, especially in places with strict requirements on noise decibel, and often receives related complaints.
However, the axial flow fan has obvious disadvantages in terms of noise, one is that the axial flow fan is easy to generate low-frequency sound, namely common humming sound, so that noise pollution is easy to cause, the working environment is influenced, long-time work is not facilitated, and how to reduce vibration and noise also becomes a problem in the industry.
Therefore, an axial flow fan noise reduction device needs to be designed, and the purpose is to overcome the defect that noise decibels generated by an axial flow fan in the prior art cannot be controlled within the allowable range of each place.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that noise decibels generated by an axial flow fan in the prior art cannot be controlled within the allowable range of each place.
The utility model is realized by the following technical scheme:
the utility model provides a device of making an uproar falls in axial fan, includes a gallows, axial fan body and amortization structure, a gallows includes a first gallows and a second gallows, axial fan body sets up on a second gallows, amortization structure cladding axial fan body, the amortization structure sets up on a first gallows, the amortization structure is multilayer structure.
The prior art can set up pipeline formula silencer before and after the tuber pipe when general axial fan installs, has better noise elimination to the aerodynamic noise in the tuber pipe, but to if someone region or near axial fan, it is far away not enough to only install pipeline formula silencer noise elimination, and it is still not neglected to produce the noise with vibrations outward propagation through the fan casing, causes serious influence to people's psychology, especially has the place of strict requirement to the noise decibel, often receives relevant complaint.
The structure that the axial flow fan body is coated by the silencing structure is added, the silencing structure is of a structure that the axial flow fan body is surrounded by a multilayer structure, and sound can be effectively silenced by the multilayer structure.
Furthermore, the silencing structure comprises a first silencing layer, a second silencing layer and a third silencing layer, wherein the first silencing layer, the second silencing layer and the third silencing layer are sequentially stacked from inside to outside, the first silencing layer is a closed-pore foam plastic layer, the second silencing layer is a hard fiberboard layer, and the third silencing layer is a perforated galvanized steel sheet layer;
the materials used by the closed-cell foam plastic layer, the hard fiberboard layer and the perforated galvanized steel sheet layer are the prior art, the first layer from inside to outside is the closed-cell foam plastic layer which can effectively absorb the noise of medium-frequency sound waves, the thickness of the material can be properly adjusted according to the requirement of sound absorption coefficient, and the layer is a main noise reduction section; the second layer is a hard fiberboard layer, the hard fiberboard also has a good absorption effect on the noise of the medium-frequency sound wave, and the second layer of hard fiberboard layer can play a role in protection after being wrapped outside because the first layer of plastic foam material is loose and easy to damage; the third layer is a perforated galvanized steel sheet layer with the thickness of 0.75mm, and the noise reduction structure performs noise reduction by one layer.
Further, a gasket is arranged on the cross frame of the first support and hanger, the width of the gasket is larger than that of the cross frame of the first support and hanger, and the gasket is connected with the bottom wall of the perforated galvanized steel sheet layer;
the width of the gasket is larger than that of the cross frame of the first support and hanger, so that the bottom surface of the device is protected from being damaged by the steel support, and meanwhile, the shock absorption effect is achieved.
Furthermore, the silencing structure is a square cavity, the axial flow fan body is arranged in the square cavity, water pipes are arranged on two sides of the axial flow fan body, a water outlet is formed in the upper end of each water pipe, a water inlet is formed in the lower end of each water pipe, and the water pipes, the water outlets and the water inlets are all arranged on the closed-cell foam plastic layers.
Further, the upper surface of the silencing device is provided with a hole, and the second hanging bracket penetrates through the hole and is fixedly connected with an axial flow fan;
the hole with the diameter of about 100mm is formed, and the axial flow fan is fixedly arranged on the second hanging bracket.
Further, double layers of butyl rubber are arranged inside and outside the holes;
the double-layer butyl rubber is arranged inside and outside the hole, and the butyl rubber has good shock absorption and sound insulation effects and is long in service life.
Further, a damper is arranged below the axial flow fan body and connected with the second support hanger;
the shock absorber is used for directly absorbing shock of the axial flow fan body.
Furthermore, mufflers are arranged on two sides of the perforated galvanized steel sheet layer, and air pipes are arranged on two sides of each muffler;
the silencer is arranged on the perforated galvanized steel sheet layer to perform two-layer silencing.
Further, the thickness of the perforated galvanized steel sheet layer is 0.6-0.85 mm, small holes with the diameter of 0.8-1.2mm are formed in the surface of the steel sheet of the perforated galvanized steel sheet layer, and the aperture ratio is 1-5%;
the noise reduction and sound absorption material absorbs sound, and simultaneously, air vibration and fiber friction of small holes in the material convert sound energy into heat energy. The DN15 galvanized steel pipe is pre-buried in the first layer of material of the device, and flowing water in a normal temperature state is used as a medium, so that the temperature of the noise reduction device is reduced, and the sound absorption coefficient and the service life of the device are improved.
Furthermore, the type of the supporting and hanging bracket is angle steel or channel steel.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the axial flow fan noise reduction device has three layers, and each layer has a noise reduction function. The first layer from inside to outside is a closed-cell foam plastic layer, the main function section of noise reduction is realized, and the thickness of the main function section is determined according to the noise reduction requirement, so that the effect of noise reduction is basically met.
2. According to the axial flow fan noise reduction device, the second layer is the hard fiberboard layer, and the effect of reinforcement is achieved while noise reduction is achieved, so that the service life of the device is guaranteed.
3. According to the axial flow fan noise reduction device, the third layer is made of the galvanized steel sheet layer, and after decorative effects such as spray painting are used, the device is more attractive to install and is suitable for various installation places.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a structural elevation of the present invention.
Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
The device comprises a 1-axial flow fan, a 2-shock absorber, a 3-closed cell type foam plastic layer, a 4-hard fiberboard layer, a 5-perforated galvanized steel plate layer, 6-butyl rubber, a 7-gasket, 81-a first hanger, 82-a second hanger, 9-a silencer, 10-an air pipe, 11-a water inlet, 12-a water outlet and 13-a water pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1-2, the utility model relates to a noise reduction device for an axial flow fan 1, which comprises a support hanger, an axial flow fan 1 body and a noise reduction structure, wherein the support hanger comprises a first support hanger 81 and a second support hanger 82, the axial flow fan 1 body is arranged on the second support hanger 82, the noise reduction structure covers the axial flow fan 1 body, the noise reduction structure is arranged on the first support hanger 81, the noise reduction structure is a multilayer structure, the structure arrangement of the noise reduction structure covering the axial flow fan 1 body is added, the noise reduction structure is an arrangement structure of the multilayer structure enclosing the axial flow fan 1 body, and the noise reduction of the multilayer structure can be effectively performed on sound.
Example 2
As shown in fig. 1-2, this embodiment is based on embodiment 1, and the sound-deadening structure includes a first sound-deadening layer, a second sound-deadening layer, and a third sound-deadening layer, which are sequentially stacked from inside to outside, where the first sound-deadening layer is a closed-cell foam plastic layer 3, the second sound-deadening layer is a hard fiberboard layer 4, and the third sound-deadening layer is a perforated galvanized steel sheet layer 5; the closed-cell foam plastic layer 3, the hard fiberboard layer 4 and the perforated galvanized steel sheet layer 5 are made of the materials in the prior art, the first closed-cell foam plastic layer 3 from inside to outside can effectively absorb the noise of medium-frequency sound waves, the thickness of the materials can be properly adjusted according to the requirement of sound absorption coefficient, and the closed-cell foam plastic layer is a main noise reduction section; the second layer is a hard fiberboard layer 4, the hard fiberboard also has a good absorption effect on the noise of medium-frequency sound waves, and the second layer of hard fiberboard layer 4 can play a role in protection after being wrapped outside because the first layer of plastic foam material is loose and easy to damage; the third layer is a perforated galvanized steel sheet layer 5 with the thickness of 0.75mm, and the noise reduction structure performs noise reduction by one layer.
A gasket 7 is arranged on the cross frame of the first support and suspension bracket 81, the width of the gasket 7 is greater than that of the cross frame of the first support and suspension bracket 81, and the gasket 7 is connected with the bottom wall of the perforated galvanized steel sheet layer 5; the width of the gasket 7 is greater than the width of the cross frame of the first support and hanger 81, so that the bottom surface of the device is protected from being damaged by the steel bracket, and the damping effect is achieved.
The noise reduction structure is a square cavity, the axial flow fan 1 body is arranged in the square cavity, water pipes 13 are arranged on two sides of the axial flow fan 1 body, a water outlet 12 is arranged at the upper end of each water pipe 13, a water inlet 11 is arranged at the lower end of each water pipe 13, and the water pipes 13, the water outlet 12 and the water inlet 11 are all arranged on the closed-cell foam plastic layer 3.
The upper surface of the silencing device is provided with a hole, and the second support and hanger 82 penetrates through the hole and is fixedly connected with the axial flow fan 1; the holes with the diameter of about 100mm are formed, and the axial flow fan 1 is fixedly arranged on the second support hanger 82.
Double layers of butyl rubber 6 are arranged inside and outside the holes; the double-layer butyl rubber 6 is arranged inside and outside the hole, the butyl rubber 6 has good shock absorption and sound insulation effects, and the service life is long.
A damper 2 is arranged below the body of the axial flow fan 1, and the damper 2 is connected with a second support bracket 82; the damper 2 is used for directly damping the axial flow fan 1 body.
A silencer 9 is arranged on two sides of the perforated galvanized steel sheet layer 5, and air pipes 10 are arranged on two sides of the silencer 9; the muffler 9 is arranged on the perforated galvanized steel sheet layer 5 for two-layer noise reduction.
The thickness of the perforated galvanized steel sheet layer 5 is 0.6mm-0.85mm, small holes with the diameter of 0.8-1.2mm are formed in the surface of the steel sheet of the perforated galvanized steel sheet layer 5, and the aperture ratio is 1-5%; the noise reduction and sound absorption material absorbs sound, and simultaneously, air vibration and fiber friction of small holes in the material convert sound energy into heat energy. The DN15 galvanized steel pipe is pre-buried in the first layer of material of the device, and flowing water in a normal temperature state is used as a medium, so that the temperature of the noise reduction device is reduced, and the sound absorption coefficient and the service life of the device are improved.
The supporting and hanging bracket is of an angle steel or a channel steel.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a device of making an uproar falls in axial fan, its characterized in that, includes a gallows, axial fan (1) body and amortization structure, a gallows includes a first gallows (81) and a second gallows (82), axial fan (1) body sets up on first gallows (81), amortization structure cladding axial fan (1) body, the amortization structure sets up on a second gallows (82), the amortization structure is multilayer structure.
2. The axial flow fan noise reduction device according to claim 1, wherein the noise reduction structure comprises a first noise reduction layer, a second noise reduction layer and a third noise reduction layer, the first noise reduction layer, the second noise reduction layer and the third noise reduction layer are sequentially stacked from inside to outside, the first noise reduction layer is a closed-pore foam plastic layer (3), the second noise reduction layer is a hard fiberboard layer (4), and the third noise reduction layer is a perforated galvanized steel sheet layer (5).
3. The axial fan noise reduction device according to claim 1, wherein a gasket (7) is arranged on the cross frame of the first support and hanger (81), the width of the gasket (7) is larger than that of the cross frame of the first support and hanger (81), and the gasket (7) is connected with the bottom wall of the perforated galvanized steel plate layer (5).
4. The axial flow fan noise reduction device according to claim 1, wherein the noise reduction structure is a square cavity, the axial flow fan (1) body is arranged in the square cavity, water pipes (13) are arranged on two sides of the axial flow fan (1) body, a water outlet (12) is arranged at the upper end of each water pipe (13), a water inlet (11) is arranged at the lower end of each water pipe (13), and the water pipes (13), the water outlet (12) and the water inlet (11) are all arranged on the closed-cell foam plastic layer (3).
5. The axial flow fan noise reduction device according to claim 1, wherein the noise reduction structure has a hole on an upper surface thereof, and the second hanger (82) is fixedly connected to the body of the axial flow fan (1) through the hole.
6. The axial flow fan noise reduction device according to claim 5, wherein a double layer of butyl rubber (6) is arranged inside and outside the holes.
7. The axial flow fan noise reduction device according to claim 1, wherein a damper (2) is arranged below the body of the axial flow fan (1), and the damper (2) is connected with the second support and hanger (82).
8. The axial flow fan noise reduction device according to claim 2, wherein mufflers (9) are arranged on two sides of the perforated galvanized steel sheet layer (5), and air pipes (10) are arranged on two sides of the mufflers (9).
9. The axial flow fan noise reduction device according to claim 2, wherein the thickness of the perforated galvanized steel sheet layer (5) is 0.6mm to 0.85mm, small holes with the diameter of 0.8 mm to 1.2mm are formed in the surface of the steel sheet of the perforated galvanized steel sheet layer (5), and the aperture ratio is 1% to 5%.
10. The axial flow fan noise reduction device of claim 1, wherein the support hanger is of a type of angle steel or channel steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121062444.XU CN215370298U (en) | 2021-05-18 | 2021-05-18 | Axial fan noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121062444.XU CN215370298U (en) | 2021-05-18 | 2021-05-18 | Axial fan noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215370298U true CN215370298U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121062444.XU Active CN215370298U (en) | 2021-05-18 | 2021-05-18 | Axial fan noise reduction device |
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| Country | Link |
|---|---|
| CN (1) | CN215370298U (en) |
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2021
- 2021-05-18 CN CN202121062444.XU patent/CN215370298U/en active Active
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