Noise control device for axial fan

Abstract

The application relates to the technical field of axial flow fans, in particular to a noise control device for an axial flow fan, which comprises an outer shell, a noise reduction assembly and a base, the outer shell is a tubular channel structure, the noise reduction assembly is arranged on the inner side wall of the outer shell, the noise reduction assembly is composed of a sound insulation piece and a sound absorption piece, an annular support beam is integrally formed on the inner side wall of the outer shell, and the base is connected with the outer shell; the noise control device for the axial flow fan is composed of the outer shell, the noise reduction assembly and the base, the noise reduction assembly is composed of the sound insulation piece and the sound absorption piece, the sound insulation piece is composed of a primary plate body, a secondary plate body and a tertiary plate body, and the sound absorption piece is embedded in a cavity formed by the outer shell, the primary plate body and the secondary plate body, so that sound waves are transmitted to the sound absorption piece position and are absorbed through the guiding effect of the sound insulation piece, and the diffusion of noise is effectively weakened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of axial flow fan, in particular to a noise control device for axial flow fan. BACKGROUND

[0002] The axial flow fan is divided into large, medium and small axial flow fans according to the use place, and the suitable axial flow fan is selected according to the requirement.

[0003] The axial flow fan produces a large noise in actual use due to the large airflow friction between the blade and the airflow, and the noise environment affects the health of the surrounding staff. SUMMARY

[0004] The present application aims to provide a noise control device for axial flow fan to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a noise control device for axial flow fan, comprising:

[0006] The outer shell is a tubular channel structure, and the inner side wall of the outer shell is integrally formed with an annular support beam.

[0007] The noise reduction assembly is arranged on the inner side wall of the outer shell and is composed of a sound insulation piece and a sound absorption piece.

[0008] The base is connected with the outer shell.

[0009] Preferably, the annular support beam is provided with multiple channels at equal intervals, the cross beams are welded to the inner side wall of the annular support beam, and the cross beams are arranged in a circle, and the annular support beam is welded with a rear support and a front support, the drive motor is installed on the rear support and the front support, and the fan blades are fixedly installed on the rotor of the drive motor.

[0010] Preferably, the sound insulation piece is composed of a first plate body, a second plate body and a third plate body, the first plate body, the second plate body and the third plate body are integrally formed, and the first plate body, the second plate body and the third plate body are all sound insulation plates.

[0011] Preferably, the first plate body, the second plate body and the third plate body are arranged in a Z shape, and the first plate body is welded to the inner side wall of the outer shell.

[0012] Preferably, the tangent at the intersection of the primary plate body and the outer shell is perpendicular to the setting direction of the primary plate body, and the secondary plate body is an arc-shaped plate body, and the secondary plate body is coaxially arranged with the outer shell.

[0013] Preferably, the tertiary plate body is arranged at an angle of 30 degrees with the primary plate body, and the sound-absorbing member is embedded in the cavity formed by the outer shell, the primary plate body and the secondary plate body.

[0014] Preferably, the sound-absorbing member is sound-absorbing cotton, and the sound-absorbing member is fixedly glued to the inner side wall of the outer shell, and a gap is left between the sound-absorbing member and the secondary plate body, and the gap between the sound-absorbing member and the secondary plate body gradually decreases from the opening side of the sound-insulating member to the inner side of the sound-insulating member.

[0015] Preferably, the opening between the sound-insulating members is arranged to face the opposite direction of the rotating direction of the fan blades.

[0016] Preferably, the base is composed of a base frame and a shock-absorbing rubber plate, the base frame is fixedly welded to the outer side wall of the outer shell, and the shock-absorbing rubber plate is fixedly glued to the lower side of the base frame.

[0017] Preferably, the shock-absorbing rubber plate is a flexible rubber plate, and anti-skid grooves are formed in the lower side of the shock-absorbing rubber plate, the anti-skid grooves are semispherical notches, and a plurality of groups of anti-skid grooves are uniformly formed in the lower side of the shock-absorbing rubber plate.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] 1. By setting the noise control device for the axial flow fan composed of the outer shell, the noise reduction assembly and the base, and by setting the noise reduction assembly to be composed of the sound-insulating member and the sound-absorbing member, and by setting the sound-insulating member to be composed of the primary plate body, the secondary plate body and the tertiary plate body, and by embedding the sound-absorbing member in the cavity formed by the outer shell, the primary plate body and the secondary plate body, the sound wave is transmitted to the sound-absorbing member position by the guiding effect of the sound-insulating member and is absorbed there, thereby effectively reducing the diffusion of noise.

[0020] 2. A gap is left between the sound-absorbing member and the secondary plate body, and the gap between the sound-absorbing member and the secondary plate body is set to gradually decrease from the opening side of the sound-insulating member to the inner side of the sound-insulating member, thereby effectively improving the contact effect of the sound-absorbing member and the sound wave, thereby improving the absorption effect of noise. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure of the present application is shown in the figure;

[0022] Figure 2 The longitudinal half-sectional view of the present application is shown in the figure;

[0023] Figure 3 As Figure 2 Enlarged view of structure at A in the middle;

[0024] Figure 4 As

[0025] Figure 5 As Figure 4 Enlarged view of structure at B in the middle;

[0026] Figure 6 As Figure 5 Enlarged view of structure at C in the middle.

[0027] In the figure: outer shell 1, base 2, annular support beam 3, cross beam 4, rear support 5, front support 6, drive motor 7, fan blade 8, sound insulation piece 9, sound absorption piece 10, first stage plate body 11, second stage plate body 12, third stage plate body 13, base frame 14, shock absorbing rubber plate 15, anti-skid groove 16. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] In order to make the purpose, technical solutions of the present application clear, complete and more clear and understandable, the embodiments of the present application will be described in further detail below with reference to the drawings. It should be understood that the specific embodiments described here are some of the embodiments of the present application, rather than all the embodiments of the present application, and are only used to explain the embodiments of the present application, and do not limit the embodiments of the present application, and all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0033] Please see Figures 1-6 The present invention provides the following three preferred embodiments.

[0034] Example 1

[0035] A noise control device for an axial flow fan includes a housing 1, a noise reduction component, and a base 2. The housing 1 has a tubular channel structure. The noise reduction component is disposed on the inner wall of the housing 1 and is composed of a sound insulation component 9 and a sound absorption component 10. An annular support beam 3 is integrally formed on the inner wall of the housing 1. The base 2 is connected to the housing 1.

[0036] The annular support beam 3 is provided with multiple beams at equal intervals. The crossbeam 4 is welded to the inner wall of the annular support beam 3. The crossbeam 4 is arranged in a circle. The annular support beam 3 is welded to a rear bracket 5 and a front bracket 6. The rear bracket 5 and the front bracket 6 are equipped with drive motors 7. The rotor of the drive motor 7 is fixedly mounted with fan blades 8.

[0037] The sound insulation component 9 is composed of a primary panel 11, a secondary panel 12, and a tertiary panel 13. The primary panel 11, secondary panel 12, and tertiary panel 13 are integrally formed and are all sound-insulating materials. They are arranged in a Z-shape. The primary panel 11 is welded to the inner wall of the outer shell 1. The tangent at the intersection of the primary panel 11 and the outer shell 1 is perpendicular to the direction of the primary panel 11. The secondary panel 12 is an arc-shaped panel and is coaxial with the outer shell 1. The tertiary panel 13 is at a 30-degree angle to the primary panel 11. The included angle is set, and the sound-absorbing component 10 is embedded in the cavity formed by the outer shell 1, the primary plate 11, and the secondary plate 12. The noise control device for the axial fan is composed of the outer shell 1, the noise reduction component, and the base 2. The noise reduction component is composed of the sound insulation component 9 and the sound-absorbing component 10. The sound insulation component 9 is composed of the primary plate 11, the secondary plate 12, and the tertiary plate 13. The sound-absorbing component 10 is embedded in the cavity formed by the outer shell 1, the primary plate 11, and the secondary plate 12. Through the guiding effect of the sound insulation component 9, the sound waves are absorbed at the position of the sound-absorbing component 10, thereby effectively reducing the diffusion of noise.

[0038] Example 2

[0039] Based on Embodiment 1, the sound-absorbing component 10 is sound-absorbing cotton, and the sound-absorbing component 10 is fixedly glued to the inner wall of the outer shell 1. A gap is left between the sound-absorbing component 10 and the secondary plate 12. The gap between the sound-absorbing component 10 and the secondary plate 12 is set to gradually decrease from the opening side of the sound insulation component 9 to the inner side of the sound insulation component 9. The gap between the sound-absorbing component 10 and the secondary plate 12 is left, and it is ensured that the gap between the sound-absorbing component 10 and the secondary plate 12 gradually decreases from the opening side of the sound insulation component 9 to the inner side of the sound insulation component 9. This effectively improves the contact effect between the sound-absorbing component 10 and the sound waves, thereby improving the noise absorption effect.

[0040] Example 3

[0041] Based on Embodiment 2, the openings between the sound insulation components 9 are oriented in the opposite direction to the rotation direction of the fan blades 8. Taking advantage of the high gas density on the fan blade surface and the higher sound wave vibration transmission efficiency, the sound waves can be more fully transmitted to the location of the sound absorption component 10 for absorption.

[0042] Example 4

[0043] Based on Embodiment 3, the base 2 is composed of a base frame 14 and a shock-absorbing rubber plate 15. The base frame 14 is fixedly welded to the outer wall of the outer shell 1, and the shock-absorbing rubber plate 15 is fixedly glued to the lower side of the base frame 14 to prevent the overall vibration of the axial fan from generating friction noise with the bottom surface.

[0044] The shock-absorbing rubber plate 15 is a flexible rubber plate, and the lower side of the shock-absorbing rubber plate 15 is provided with anti-slip grooves 16. The anti-slip grooves 16 are hemispherical grooves, and multiple sets of anti-slip grooves 16 are evenly provided on the lower side of the shock-absorbing rubber plate 15 to improve the stability of the axial flow fan on the ground.

[0045] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A noise control device for an axial flow fan, characterized in that: The noise control device for the axial fan includes: The outer shell (1) is a tubular channel structure, and an annular support beam (3) is integrally formed on the inner side wall of the outer shell (1). The noise reduction component is disposed on the inner sidewall of the outer shell (1) and is composed of a sound insulation component (9) and a sound absorption component (10); Base (2), which is connected to the outer shell (1); The sound insulation component (9) is composed of a primary plate (11), a secondary plate (12) and a tertiary plate (13). The primary plate (11), the secondary plate (12) and the tertiary plate (13) are integrally formed, and the primary plate (11), the secondary plate (12) and the tertiary plate (13) are all sound insulation materials. The first-level plate (11), the second-level plate (12), and the third-level plate (13) are arranged in a Z-shape, and the first-level plate (11) is welded to the inner wall of the outer shell (1). The sound-absorbing component (10) is sound-absorbing cotton, and the sound-absorbing component (10) is fixedly glued to the inner wall of the outer shell (1), and there is a gap between the sound-absorbing component (10) and the secondary plate (12), and the gap between the sound-absorbing component (10) and the secondary plate (12) is set to gradually decrease from the opening side of the sound insulation component (9) to the inner side of the sound insulation component (9); The openings between the sound insulation components (9) are oriented in the opposite direction to the rotation direction of the fan blades (8).

2. The noise control device for an axial flow fan according to claim 1, characterized in that: The annular support beam (3) is provided with multiple beams at equal intervals. Its crossbeam (4) is welded to the inner wall of the annular support beam (3). The crossbeam (4) is provided with a circle. The annular support beam (3) is welded to a rear bracket (5) and a front bracket (6). The rear bracket (5) and the front bracket (6) are equipped with drive motors (7). The rotor of the drive motor (7) is fixedly equipped with fan blades (8).

3. The noise control device for an axial flow fan according to claim 1, characterized in that: The direction of the tangent at the intersection of the primary plate (11) and the outer shell (1) is perpendicular to the setting direction of the primary plate (11), and the secondary plate (12) is an arc-shaped plate, and the secondary plate (12) and the outer shell (1) are set on the same axis.

4. The noise control device for an axial flow fan according to claim 3, characterized in that: The third-level plate (13) and the first-level plate (11) are set at a 30-degree angle, and the sound-absorbing component (10) is embedded in the cavity formed by the outer shell (1), the first-level plate (11) and the second-level plate (12).

5. A noise control device for an axial flow fan according to claim 1, characterized in that: The base (2) is composed of a base frame (14) and a shock-absorbing rubber plate (15). The base frame (14) is fixedly welded to the outer wall of the outer shell (1), and the shock-absorbing rubber plate (15) is fixedly glued to the lower side of the base frame (14).

6. A noise control device for an axial flow fan according to claim 5, characterized in that: The shock-absorbing rubber plate (15) is a flexible rubber plate, and an anti-slip groove (16) is provided on the lower side of the shock-absorbing rubber plate (15). The anti-slip groove (16) is a hemispherical groove, and multiple sets of anti-slip grooves (16) are evenly provided on the lower side of the shock-absorbing rubber plate (15).

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