Fan sound insulation device

Abstract

The utility model relates to the technical field of sound insulation and noise reduction, and particularly discloses a fan sound insulation device which comprises a multi-layer sound insulation structure covering the outer wall of a shell and a plurality of honeycomb holes formed in the inner surface of the shell and used for absorbing sound. The multi-layer sound insulation structure comprises a corrugated plate covering the outer wall of the shell, a peripheral sound insulation plate covering the outer wall of the corrugated plate, a multi-layer sound insulation structure fixedly connected to the outer side of the shell and covering the outer wall of the shell, and a plurality of honeycomb holes formed in the shell. The corrugated plate is fixedly connected to the outer side of the shell and covers the outer wall of the shell, and the peripheral sound insulation structure is fixedly connected to the side, away from the shell, of the corrugated plate and covers the outer wall of the corrugated plate. The problems that when the draught fan works, large noise generated by friction between a pneumatic structure and air cannot be reduced, and the environment and personnel are affected are solved.

Description

Technical Field

[0001] This application relates to the technical field of sound insulation and noise reduction, and specifically discloses a fan sound insulation device. Background Art

[0002] A fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine and is widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and induced draft in boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household electrical appliances, drying and selection of grains, air source of wind tunnels and inflation and propulsion of hovercrafts, etc.

[0003] The fan includes a housing, a disc-shaped chamber formed inside the housing, an installation hole opened on one side of the disc-shaped chamber, an installation seat installed on the installation hole, the installation seat is used to fix the pneumatic structure and the motor, the pneumatic structure is a fan blade coaxially sleeved on the output shaft of the motor, an air inlet is opened on the housing on the other side of the disc-shaped chamber and extends outwards to form an air inlet pipe communicating with the air inlet, an air outlet passage communicating with the disc-shaped chamber is formed inside the housing, the fan blade is driven to rotate by starting the motor, air is inhaled from the air inlet into the air inlet pipe, and the inhaled air flows inside the housing through the pneumatic structure and is finally discharged from the housing through the air outlet passage.

[0004] However, most of the existing fan housings are single-layer structures and do not have sound insulation effects. They cannot reduce the relatively large noise generated by the friction between the pneumatic structure and the air when the fan is working, which will have an impact on the environment and personnel.

[0005] Therefore, in view of this, the inventor provides a fan sound insulation device to solve the above problems. Content of the Utility Model

[0006] The purpose of the present utility model is to solve the problems that most of the existing fan housings are single-layer structures and do not have sound insulation effects. They cannot reduce the relatively large noise generated by the friction between the pneumatic structure and the air when the fan is working, which will have an impact on the environment and personnel.

[0007] To achieve the above purpose, the basic scheme of the present utility model provides a fan sound insulation device, including: a multi-layer sound insulation structure covering the outer wall of the housing and a number of honeycomb holes for sound absorption opened on the inner surface of the housing, and the multi-layer sound insulation structure includes a corrugated board covering the outer wall of the housing and an outer peripheral sound insulation board covering the outer wall of the corrugated board.

[0008] The principle and effect of this basic scheme are as follows:

[0009] Compared with the prior art, the utility model is provided with a multi-layer sound insulation structure on the outer side of the shell, and a number of honeycomb holes are opened on the shell. When the fan blades are driven to rotate by the motor, air is inhaled from the air inlet into the air inlet pipe. The inhaled air flows in the shell through the pneumatic structure and finally is discharged from the air outlet passage out of the shell. During the operation of the fan, the noise generated by the friction or impact between the pneumatic structure and the air is silenced through the multi-layer sound insulation structure and the honeycomb holes, solving the problem that the existing fan shells are mostly single-layer structures, without sound insulation effect, and cannot reduce the relatively large noise generated by the friction between the pneumatic structure and the air during the operation of the fan, which will affect the environment and personnel.

[0010] Furthermore, it also includes a number of steel pipes that sequentially fix the outer peripheral sound insulation board, the corrugated board and the shell, and the inner cavity of the steel pipe is filled with sound insulation materials. The steel pipes fixedly connect the outer peripheral sound insulation board, the corrugated board and the shell, making it difficult for the three to vibrate relatively, and reducing the noise generated by their relative vibration.

[0011] Furthermore, it also includes a number of protrusions provided on the inner wall of the shell, and the honeycomb holes are all opened on the protrusions. The size of the end of the honeycomb hole facing the disc-shaped chamber is larger than that of the other end, and the inner wall gap of the honeycomb hole gradually decreases from the end facing the disc-shaped chamber to the other end. The honeycomb holes can not only reduce the noise during the operation of the fan, but also reduce the weight of the shell.

[0012] Furthermore, sound insulation materials are filled between adjacent protrusions. Filling sound insulation materials between the protrusions further enhances the noise reduction effect of the shell on the noise generated during the operation of the fan.

[0013] Furthermore, an anti-vibration assembly for preventing the fan from vibrating is provided on the outer side of the outer peripheral sound insulation board. The anti-vibration assembly includes support feet fixedly connected to the outer peripheral sound insulation board and used for supporting the fan, and a number of support columns fixedly connected to both ends of the bottom of the support feet. The support columns include two anti-vibration pads that are spliced with each other and used for supporting the support feet, and sound insulation and shock absorption materials provided on the inner side of the anti-vibration pads and attached to the anti-vibration pads. The anti-vibration pads are fixedly connected to the bottom of the support feet. The anti-vibration washers, anti-vibration pads and sound insulation and shock absorption materials can greatly reduce the vibration and noise of the fan.

[0014] Furthermore, exhaust holes and exhaust grooves are opened below the anti-vibration pads. The exhaust grooves are communicated with the exhaust holes and are symmetrically distributed on both sides of the exhaust holes. The vibration of the motor will squeeze the anti-vibration pads, and the exhaust grooves can discharge a part of the air pressed down during vibration, which can greatly reduce the vibration amplitude of the fan. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Shows a schematic diagram of a fan sound insulation device proposed in an embodiment of the present application;

[0017] Figure 2 Shows a partial cross-sectional view of a fan sound insulation device proposed in an embodiment of the present application;

[0018] Figure 3 Shows a partial cross-sectional view of a fan sound insulation device proposed in an embodiment of the present application;

[0019] Figure 4 Shows a partial schematic diagram of a fan sound insulation device proposed in an embodiment of the present application. Detailed implementation manners

[0020] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in combination with the accompanying drawings and preferred embodiments, will detail the specific implementation manners, structures, features, and their effects of the present utility model as follows.

[0021] The reference numerals in the accompanying drawings of the specification include: outer sound insulation board 1, housing 2, protrusion 3, honeycomb holes 4, corrugated plate 5, sound insulation and shock absorption material 6, sound insulation material 7, support feet 8, shockproof cushion plate 9, steel pipe 11.

[0022] A fan sound insulation device, as shown in embodiments such as Figure 1 and Figure 2 shown: It includes a multi-layer sound insulation structure covering the outer wall of the housing 2 and a plurality of honeycomb holes 4 opened on the housing 2 for sound absorption. The multi-layer sound insulation structure includes a corrugated plate 5 covering the outer wall of the housing 2 and an outer sound insulation board 1 covering the outer wall of the corrugated plate 5. Inner surface

[0023] In this embodiment, the wall thickness of the corrugated plate 5 and the outer sound insulation board 1 surrounding the outside of the disk-shaped cavity of the housing 2 gradually thickens from both ends to the middle.

[0024]

[0024] There are 8 steel pipes 11 passing through and sequentially fixing the outer sound insulation board 1, the corrugated board 5 and the housing 2 between the outer sound insulation board 1 and the housing 2, and sound insulation material 7 is filled in the inner cavity of the steel pipes 11. Specifically, both ends of the steel plate are fixedly installed between the outer sound insulation board 1 and the housing 2. The outer wall of the middle part of the steel pipe 11 is fixedly connected with the corrugated board 5, and the inner cavity of the steel pipe 11 is filled with sound insulation material 7, and the sound insulation material 7 is specifically foamed coarse-pore sea of rubber and plastic. And in this embodiment, the length and size of the steel pipe 11 change with the thickness of the housing 2, the corrugated board 5 and the outer sound insulation board 1. The steel pipe 11 uniformly fixes the outer sound insulation board 1, the corrugated board 5 and the housing 2, making it difficult for the three to vibrate relatively, reducing the noise generated by the relative vibration of the three. The foamed coarse-pore sponge of rubber and plastic in the inner cavity of the steel pipe 11 also plays a noise reduction effect at the same time.

[0025] On one side of the housing 2 facing the disc-shaped chamber, a number of protrusions 3 are integrally formed. The honeycomb holes 4 are all opened on the protrusions 3. The size of one end of the honeycomb hole 4 facing the disc-shaped chamber is larger than that of the other end, and the inner wall gap of the honeycomb hole 4 gradually decreases from one end facing the disc-shaped chamber to the other end. The honeycomb holes 4 can not only reduce the noise during the operation of the fan, but also reduce the weight of the housing 2. Sound insulation material 7 is filled between adjacent protrusions 3. The sound insulation material 7 is specifically foamed coarse-pore sponge of rubber and plastic, strengthening the noise reduction effect of the housing 2 on the noise generated during the operation of the fan.

[0026] In this embodiment, an anti-vibration assembly for preventing the vibration of the fan is installed outside the outer sound insulation board 1. The anti-vibration assembly includes support feet 8 fixedly installed on the outer sound insulation board 1 and used for supporting the fan and support columns fixedly installed at both ends of the bottom of the support feet 8. The support columns include two anti-vibration pads 9 spliced with each other and used for supporting the support feet 8 and sound insulation and shock absorption material 6 installed on the inner side of the anti-vibration pads 9 and fitting with the anti-vibration pads 9. The anti-vibration pads 9 are fixedly installed at the bottom of the support feet 8. Specifically, the two anti-vibration pads 9 in the support column are arc-shaped, and the two anti-vibration pads 9 can be spliced into a cylinder. The anti-vibration pads 9 are welded to the bottom of the support feet 8. The sound insulation and shock absorption material 6 is installed between the two anti-vibration pads 9, and the outer wall of the sound insulation and shock absorption material 6 closely adheres to the inner walls of the two anti-vibration pads 9. The sound insulation and shock absorption material 6 is oil-resistant rubber. The oil-resistant rubber has good resistance to the pressing-in of hard objects and good elastic recovery force, and can greatly reduce the vibration noise of the fan. Exhaust holes and exhaust grooves are also opened below the anti-vibration pads 9. The exhaust grooves are communicated with the exhaust holes and symmetrically distributed on both sides of the exhaust holes. The vibration of the fan motor will squeeze the anti-vibration pads 9, and the exhaust holes and exhaust grooves can discharge a part of the air pressed down during vibration, which can greatly reduce the amplitude of the fan vibration.

[0027] When the utility model is in use, when the fan starts to work, the fan blades are driven to rotate electrically, and air is sucked from the air inlet into the air inlet pipe. The sucked air flows in the housing 2 through the pneumatic structure and is finally discharged from the housing 2 through the air outlet passage. When the pneumatic structure in the fan operates, it will generate a large amount of noise due to friction or impact with the air. The honeycomb holes 4 and corrugated plates 5 on the housing 2 will effectively reduce the noise generated by the pneumatic structure; the fan will also generate noise due to vibration during operation. The shock-proof pads 9 and sound-insulating and shock-absorbing materials 6 installed at the bottom of the support feet 8 will reduce the vibration noise of the fan. The exhaust holes and exhaust grooves below the shock-proof pads 9 will discharge a part of the air pressed down when the fan vibrates, further reducing the amplitude of the fan vibration to a greater extent.

[0028] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form an equivalent embodiment with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fan sound insulation device, characterized in that, Comprising: A multi-layer sound insulation structure covering the outer wall of the housing and a number of honeycomb holes for sound absorption opened on the inner surface of the housing. The multi-layer sound insulation structure includes a corrugated plate covering the outer wall of the housing and a peripheral sound insulation plate covering the outer wall of the corrugated plate.

2. The fan sound insulation device according to claim 1, characterized in that, It further includes a number of steel pipes for successively fixing the peripheral sound insulation plate, the corrugated plate and the housing, and the inner cavity of the steel pipe is filled with sound insulation material.

3. The aero-engine sound insulation device according to claim 1, wherein, It further includes a number of protrusions provided on the inner wall of the housing. The honeycomb holes are all opened on the protrusions. The size of the end of the honeycomb hole facing the disc-shaped chamber is larger than that of the other end, and the inner wall gap of the honeycomb hole gradually decreases from the end facing the disc-shaped chamber to the other end.

4. The aero-engine sound insulation device according to claim 3, characterized in that, Sound insulation material is filled between adjacent protrusions.

5. The fan sound insulation device according to claim 1, characterized in that, A shock-proof component for preventing the vibration of the fan is provided on the outer side of the peripheral sound insulation plate. The shock-proof component includes support feet fixed on the peripheral sound insulation plate and used for supporting the fan and a number of support columns fixed at both ends of the bottom of the support feet. The support column includes two shock-proof cushion plates spliced with each other and used for supporting the support feet and a sound insulation and shock-absorbing material provided on the inner side of the shock-proof cushion plate and attached to the shock-proof cushion plate. The shock-proof cushion plate is fixed at the bottom of the support feet.

6. The blower sound insulation device according to claim 5, wherein, Exhaust holes and exhaust grooves are opened below the shock-proof cushion plate. The exhaust grooves are communicated with the exhaust holes and symmetrically distributed on both sides of the exhaust holes.

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