CN112177984B - A fan noise reduction structure - Google Patents

Abstract

The application relates to a fan noise reduction structure, and relates to the technical field of fan noise reduction. The support structure is provided with a vibration reduction structure for reducing the vibration of the axial flow fan. The noise reduction structure includes a sound absorption component for absorbing the noise of the axial flow fan and an anti-sound component for reflecting the noise of the axial flow fan. The sound absorption component is arranged inside the anti-sound component. , the sound-absorbing component includes a first sound-absorbing layer, a second sound-absorbing layer and a third sound-absorbing layer, the first sound-absorbing layer is arranged on the inner side of the second sound-absorbing layer, and the second sound-absorbing layer is arranged on the third sound-absorbing layer Inside, the first sound-absorbing layer is provided with a number of sound-absorbing holes, the third sound-absorbing layer is composed of a plurality of arc plates, and the plurality of arc plates are arranged at intervals, and the second sound-absorbing layer is the center of the array. distributed. The present application has the effect of reducing the noise of the axial flow fan.

Description

A fan noise reduction structure

technical field

The present application relates to the technical field of fan noise reduction, and in particular, to a fan noise reduction structure.

Background technique

Axial flow fans are very widely used, that is, the airflow in the same direction as the axis of the fan blades, such as electric fans, air conditioner outdoor fans are axial flow fans. It is called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are usually used in applications with high flow requirements and low pressure requirements. Axial fans fix the position and move the air. Axial fans are mainly composed of fan impeller and casing.

Ordinary axial flow fans can be used for ventilation in general factories, warehouses, offices, residences, etc., and can also be used for air coolers (air coolers), evaporators, condensers, spray drops, etc. There are also mine shafts. The power of the axial flow fan is relatively large, resulting in a relatively large noise of the axial flow fan.

In view of the above-mentioned related technologies, the inventor believes that due to the relatively large noise of the axial flow fan, it will cause adverse effects on people's production and life.

SUMMARY OF THE INVENTION

In order to reduce the adverse effects on people's daily life due to the high noise of the axial flow fan, the present application provides a noise reduction structure for a fan.

A fan noise reduction structure provided by the present application adopts the following technical solutions:

A fan noise reduction structure, including an axial flow fan, a noise reduction structure for reducing the noise of the axial flow fan is arranged on the periphery of the axial flow fan, the noise reduction structure is cylindrical, and the bottom of the noise reduction structure is fixedly connected with a support The support structure is provided with a vibration damping structure for reducing the vibration of the axial flow fan;

The noise reduction structure includes a sound absorption component for absorbing the noise of the axial flow fan and an anti-sound component for reflecting the noise of the axial flow fan, and the sound absorption component is arranged inside the anti-sound component.

By adopting the above technical solutions, the noise reduction structure is used to reduce the noise of the axial flow fan, the support structure is used to support the axial flow fan, and the vibration damping structure is used to reduce the vibration of the axial flow fan. The noise is first absorbed by the sound-absorbing component, the noise passing through the sound-absorbing component is reflected by the anti-sound component to the sound-absorbing component, and the sound-absorbing component re-absorbs the reflected noise again. to absorb.

Preferably, the sound absorbing assembly includes a first sound absorbing layer, a second sound absorbing layer and a third sound absorbing layer, the first sound absorbing layer is arranged inside the second sound absorbing layer, and the second sound absorbing layer is The layer is arranged inside the third sound absorbing layer.

By adopting the above technical solution, the first sound absorbing layer absorbs the noise for the first time, the second sound absorbing layer absorbs the noise passing through the first sound absorbing layer, and the third sound absorbing layer absorbs the noise passing through the second sound absorbing layer to absorb.

Preferably, the first sound-absorbing layer is provided with a number of sound-absorbing holes; the third sound-absorbing layer is composed of a plurality of arc plates, and the plurality of the arc plates are arranged at intervals along the circumferential direction of the first sound-absorbing layer .

By adopting the above technical solution, the sound-absorbing holes are used to absorb noise. After the noise enters the sound-absorbing holes, the sound waves collide left and right on the side walls of the sound-absorbing holes, and the energy of the sound waves is gradually consumed; when the sound waves enter between the arc plates, the sound waves are The side wall of the arc plate collides, and the energy of the sound wave is gradually consumed to realize the absorption of noise.

Preferably, the anti-sound assembly includes a first anti-sound layer, a second anti-sound layer and a third anti-sound layer, the first anti-sound layer is fixed outside the third sound-absorbing layer, and the second anti-sound layer It is fixed on the outside of the first anti-sound layer, and the third anti-sound layer is fixed on the outside of the second anti-sound layer.

By adopting the above technical solution, the first anti-sound layer, the second anti-sound layer and the third anti-sound layer reflect the noise passing through the sound absorbing component in turn, so as to prevent the noise from passing through the anti-sound component, so as to realize that the anti-sound component has better sound quality. sound insulation effect.

Preferably, the support structure includes a fixed plate and a plurality of support seats, the fixed plate is arranged on the bottom of the noise reduction structure, and a plurality of the support seats are arranged on the bottom of the fixed plate.

By adopting the above technical solution, the support seat supports the fixing plate, and the fixing plate is attached to the bottom of the noise reduction structure, so that the fixing plate has better firmness.

Preferably, a plurality of grooves are formed in the fixing plate; the damping structure includes a plurality of buffer assemblies and buffer plates located in the grooves, a plurality of the buffer assemblies are fixedly connected, and the buffer plates are located adjacent to each other. between the buffer components.

By adopting the above-mentioned technical solution, the buffer components attenuate the vibration generated by the axial flow fan, and the multiple buffer components simultaneously reduce the vibration of the axial flow fan, thereby improving the vibration reduction effect.

Preferably, the buffer assembly includes an elastic member and a limit shaft, the limit shaft penetrates the elastic member; a sliding groove is formed on the inner wall of the groove in the height direction; the buffer plate is integrally connected with a sliding groove The sliding block is slidably fitted in the chute.

By adopting the above technical solution, the elastic member is used to weaken the vibration of the axial flow fan, the limit shaft defines the elastic member, and the slider slides in the chute, so that the buffer plate moves up and down in the height direction of the groove.

Preferably, the noise reduction structure is provided with a cooling structure for cooling the axial flow fan.

By adopting the above technical solution, the cooling structure is used to cool the noise reduction structure, thereby indirectly cooling the axial flow fan.

Preferably, the cooling structure includes a water inlet pipe, a first cooling pipe, a second cooling pipe, a third cooling pipe, a water tank and a water pump, one end of the water inlet pipe is communicated with the water pump, and the other end is communicated with the first cooling pipe. The first cooling pipe passes through the first sound absorption layer and communicates with the second cooling pipe, the second cooling pipe passes through the second sound absorption layer and communicates with the third cooling pipe, and the third cooling pipe passes through the third sound absorption layer and the water tank Connected.

By adopting the above technical solution, the water inlet pipe flows water into the first cooling pipe, the water in the first cooling pipe cools the first sound-absorbing layer, the water in the first cooling pipe flows into the second cooling pipe, and the water in the second cooling pipe The second sound absorption layer is cooled, the water in the second cooling pipe flows into the third cooling pipe, and the water in the third cooling pipe is directed to the third sound absorption layer.

Preferably, the axial flow fan includes a driving motor, a plurality of fan blades and a plurality of fixing rods, the driving motor is fixed on the inner side of the first sound absorbing layer by the plurality of fixing rods, and the plurality of the fan blades are coaxially fixed on the inner side of the first sound absorbing layer. on the motor shaft of the drive motor.

By adopting the above technical solution, a plurality of fixing rods fix the drive motor inside the first sound absorbing layer, the drive motor drives the drive motor shaft to rotate, and the rotation of the motor shaft of the drive motor drives the fan blades to rotate.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application.

FIG. 2 is an exploded schematic diagram of an embodiment of the present application.

FIG. 3 is a cross-sectional view of an embodiment of the present application.

FIG. 4 is a partial exploded schematic diagram of an embodiment of the present application.

FIG. 5 is a schematic structural diagram of a vibration damping structure in an embodiment of the present application.

Description of reference numerals: 1. Axial flow fan; 11. Drive motor; 12. Fan blade; 13. Fixed rod; 2. Noise reduction structure; 3. Sound-absorbing component; 31. First sound-absorbing layer; hole; 32, second sound absorption layer; 33, third sound absorption layer; 331, arc plate; 4, anti-sound assembly; 41, first anti-sound layer; 42, second anti-sound layer; 43, third anti-sound layer Acoustic layer; 5, cooling structure; 51, water inlet pipe; 52, first cooling pipe; 53, second cooling pipe; 54, third cooling pipe; 55, water tank; 56, water pump; 6, supporting structure; 61, fixing plate; 62, support seat; 63, groove; 631, chute; 7, damping structure; 71, damping assembly; 711, elastic part; 712, limit shaft; 72, buffer plate; 721, slider.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-5.

The embodiment of the present application discloses a fan noise reduction structure. 1 and 2, the fan noise reduction structure includes an axial flow fan 1 and a noise reduction structure 2, the noise reduction structure 2 is installed on the periphery of the axial flow fan 1, and a support structure 6 is welded at the bottom of the noise reduction structure 2. A vibration reduction structure 7 is provided. The vibration reduction structure 7 is used to reduce the vibration of the axial flow fan 1. The noise reduction structure 2 is provided with a cooling structure 5 for cooling the axial flow fan 1; the noise generated by the operation of the axial flow fan 1 is reduced. After the noise structure 2 absorbs and reflects, the noise is reduced, and the vibration damping structure 7 attenuates the vibration generated by the axial flow fan 1 during operation.

1 and 2 , the noise reduction structure 2 includes a sound absorption component 3 for absorbing the noise of the axial flow fan 1 and an anti-sound component 4 for reflecting the noise of the axial flow fan 1 .

1 and 2 , the axial flow fan 1 includes a driving motor 11 , a plurality of fan blades 12 and a plurality of fixing rods 13 . The driving motor 11 is welded to the inside of the noise reduction structure 2 through the plurality of fixing rods 13 , and the plurality of fixing rods 13 Welded on the periphery of the drive motor 11 , the plurality of fan blades 12 are coaxially welded on the motor shaft of the drive motor 11 , the drive motor 11 drives the motor shaft to rotate, and the drive motor 11 drives the plurality of fan blades 12 to rotate.

2 and 3 , the sound absorbing assembly 3 includes a first sound absorbing layer 31 , a second sound absorbing layer 32 and a third sound absorbing layer 33 , the first sound absorbing layer 31 is welded on the periphery of the fixing rod 13 , and the first sound absorbing layer 31 is welded to the periphery of the fixing rod 13 . The layer 31 is steel plate, the second sound-absorbing layer 32 is leather, the third sound-absorbing layer 33 is aluminum plate, the first sound-absorbing layer 31 is glued and fixed on the inner side of the second sound-absorbing layer 32, and the second sound-absorbing layer 32 is glued It is fixed on the inner side of the third sound-absorbing layer 33, the cross-sections of the first sound-absorbing layer 31 and the second sound-absorbing layer 32 are circular, and the diameter of the second sound-absorbing layer 32 is larger than that of the first sound-absorbing layer 31; when the motor is driven 1. When noise is generated, the first sound absorbing layer 31 absorbs the noise for the first time, the second sound absorbing layer 32 absorbs the noise passing through the first sound absorbing layer 31, and the third sound absorbing layer 33 absorbs the noise passing through the second sound absorbing layer 33. The noise of layer 32 is absorbed.

2 and 3, the first sound absorbing layer 31 is provided with a plurality of sound absorbing holes 311, the sound absorbing holes 311 are evenly opened on the first sound absorbing layer 31, and the shape of the sound absorbing holes 311 is circular The third sound-absorbing layer 33 is composed of a plurality of arc plates 331, the length direction of the third sound-absorbing layer 33 is consistent with the axial direction of the first sound-absorbing layer 31, a plurality of arc plates 331 are arranged at intervals, and a plurality of arc plates 331 The second sound absorbing layer 32 is distributed in an array.

2 and 3, the anti-sound assembly 4 includes a first anti-sound layer 41, a second anti-sound layer 42 and a third anti-sound layer 43, the first anti-sound layer 41 is a steel plate, and the second anti-sound layer 42 is lead plate, the third anti-sound layer 43 is a steel plate, the cross sections of the first anti-sound layer 41, the second anti-sound layer 42 and the third anti-sound layer 43 are all circular, and the first anti-sound layer 41, the second The radii of the acoustic layer 42 and the third anti-sound layer 43 gradually increase; the first anti-sound layer 41 is fixed on the outside of the third acoustic absorbing layer 33 by welding, and the second acoustic layer 42 is fixed on the first anti-sound layer 41 by welding On the outside, the third anti-sound layer 43 is fixed to the outside of the second anti-sound layer 42 by welding.

1 and 2, the cooling structure 5 includes a water inlet pipe 51, a first cooling pipe 52, a second cooling pipe 53, a third cooling pipe 54, a water tank 55 and a water pump 56, and the water tank 55 is placed beside the axial flow fan 1 side, The water tank 55 is a hollow cylinder, and the water pump 56 is fixed on the top of the water tank 55 by bolts. The water pump 56 is connected to the water tank 55 through a water pipe. Passing through the first sound absorbing layer 31 and communicating with the second cooling pipe 53 , the first cooling pipe 52 extends along the axial direction of the first sound absorbing layer 31 , and the second cooling pipe 53 penetrates the second sound absorbing layer 32 and the third cooling pipe 54 The second cooling pipe 53 extends axially along the second sound absorbing layer 32 , the third cooling pipe 54 penetrates the third sound absorbing layer 33 and communicates with the water tank 55 , and the third cooling pipe 54 extends along the length direction of the third sound absorbing layer 33 , the water pump 56 pumps out the water in the water tank 55, and flows the extracted water to the water inlet pipe 51, and the water in the water inlet pipe 51 flows through the first cooling pipe 52, the second cooling pipe 53 and the third cooling pipe 54 in turn, and finally, The water in the third cooling pipe 54 flows into the water tank 55 to form a closed cycle.

4 and 5 , the support structure 6 includes a fixed plate 61 and a plurality of support seats 62 , the top surface of the fixed plate 61 is fitted and fixed to the bottom of the noise reduction structure 2 by welding, and a plurality of grooves are opened in the fixed plate 61 63 , a plurality of grooves 63 are distributed at the four corners of the fixing plate 61 , a plurality of support seats 62 are arranged at the bottom of the fixing plate 61 , and the number of the support seats 62 is equal to the number of the grooves 63 .

4 and 5 , the damping structure 7 includes a plurality of buffer assemblies 71 and a buffer plate 72 located in the groove 63 , the plurality of buffer assemblies 71 are welded and fixed, and the buffer plates 72 are located between adjacent buffer assemblies 71 .

4 and 5, the buffer assembly 71 includes an elastic member 711 and a limit shaft 712, the limit shaft 712 penetrates through the elastic member 711; the inner wall of the groove 63 in the height direction is provided with a chute 631; the buffer plate 72 is integrally formed A sliding block 721 is connected with the sliding block 721 , and the sliding block 721 is slidably fitted in the sliding groove 631 .

The implementation principle of a fan noise reduction structure in the embodiment of the present application is as follows: first, when the axial flow fan 1 is working, the noise generated by the axial flow fan 1 is sequentially absorbed by the first sound absorbing layer 31 , the second sound absorbing layer 32 and the third sound absorbing layer 32 . The noise absorbed by the sound absorbing layer 33 but not absorbed by the sound absorbing component 3 is reflected by the noise of the first anti-sound layer 41 , the second anti-sound layer 42 and the third anti-sound layer 43 in turn, and the noise enters the sound absorbing component 3 again , the noise is absorbed by the sound absorbing component 3 again, thereby forming a noise absorbing cycle.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (1)

1. A fan noise reduction structure, comprising an axial fan (1), characterized in that: a noise reduction structure (2) for reducing the noise of the axial fan (1) is provided on the periphery of the axial fan (1), so The noise reduction structure (2) is cylindrical, the bottom of the noise reduction structure (2) is fixedly connected with a support structure (6), and the support structure (6) is provided with a damper for reducing the vibration of the axial fan (1). Vibration structure (7); The noise reduction structure (2) includes a sound absorption component (3) for absorbing the noise of the axial flow fan (1) and an anti-sound component (4) for reflecting the noise of the axial flow fan (1), and the sound absorption component (3) is provided with Inside the anti-sound assembly (4); The sound absorbing assembly (3) includes a first sound absorbing layer (31), a second sound absorbing layer (32) and a third sound absorbing layer (33), the first sound absorbing layer (31) being arranged on the second sound absorbing layer (31) Inside the sound absorbing layer (32), the second sound absorbing layer (32) is disposed inside the third sound absorbing layer (33); the first sound absorbing layer (31) is configured as a steel plate, and the second sound absorbing layer (31) is The sound layer (32) is configured as leather, and the third sound-absorbing layer (33) is configured as an aluminum plate; The first sound-absorbing layer (31) is provided with a plurality of sound-absorbing holes (311); The third sound-absorbing layer (33) is composed of a plurality of arc plates (331), and the plurality of the arc plates (331) are arranged at intervals along the circumference of the first sound-absorbing layer (31); The anti-sound assembly (4) comprises a first anti-sound layer (41), a second anti-sound layer (42) and a third anti-sound layer (43), and the first anti-sound layer (41) is fixed on the third The outer ring of the sound absorbing layer (33), the second sound reflection layer (42) is fixed on the outer ring of the first sound reflection layer (41), and the third sound reflection layer (43) is fixed on the second sound reflection layer ( 42) Outer ring; the first anti-sound layer (41) is configured as a steel plate, the second acoustic layer (42) is configured as a lead plate, and the third acoustic layer (43) is configured as a steel plate; The noise reduction structure (2) is provided with a cooling structure (5) for cooling the axial flow fan (1); The cooling structure (5) includes a water inlet pipe (51), a first cooling pipe (52), a second cooling pipe (53), a third cooling pipe (54), a water tank (55) and a water pump (56). One end of the water inlet pipe (51) is communicated with the water pump (56), and the other end is communicated with the first cooling pipe (52), the first cooling pipe (52) passing through the first sound absorbing layer (31) and the second cooling pipe (53) ), the second cooling pipe (53) penetrates the second sound absorbing layer (32) and communicates with the third cooling pipe (54), and the third cooling pipe (54) penetrates the third sound absorbing layer (33) and The water tank (55) is connected; The supporting structure (6) includes a fixing plate (61) and a plurality of supporting seats (62), the fixing plate (61) is fitted on the bottom of the noise reduction structure (2), and a plurality of the supporting seats (62) is arranged at the bottom of the fixing plate (61); the fixing plate (61) is provided with a plurality of grooves (63); the vibration damping structure (7) includes a plurality of buffer assemblies (71) located in the grooves (63) ) and a buffer plate (72), a plurality of the buffer assemblies (71) are fixedly connected, and the buffer plates (72) are located between adjacent buffer assemblies (71); The buffer assembly (71) includes an elastic member (711) and a limit shaft (712), and the limit shaft (712) penetrates the elastic member (711); A chute (631) is provided on the inner wall of the groove (63) in the height direction; A slider (721) is integrally connected to the buffer plate (72), and the slider (721) is slidably fitted in the chute (631); The axial flow fan (1) includes a driving motor (11), a plurality of fan blades (12) and a plurality of fixing rods (13), and the driving motor (11) is fixed on the first Inside the sound absorbing layer (31), a plurality of the fan blades (12) are coaxially fixed on the motor shaft of the driving motor (11).

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