External noise reduction structure for axial flow fan

Abstract

The utility model discloses an external noise reduction structure for an axial flow fan, which belongs to the technical field of axial flow fans, and is characterized by comprising an axial flow fan body, the outer wall of the axial flow fan body is movably connected with a protection structure, the bottom of the axial flow fan body is fixedly connected with a supporting structure, and the supporting structure is fixedly connected with the axial flow fan body. The inner wall of the mounting frame is movably connected with the outer wall of the axial flow fan body, the inner side of the mounting frame is fixedly connected with the outer side of a fixing block, the inner wall of the fixing block is movably connected with the outer wall of the axial flow fan body, and the outer wall of the fixing block is movably connected with the inner wall of a noise reduction block. An existing axial flow fan usually adopts a single noise reduction means, such as a single-layer sound absorption material or a sound insulation plate, the optimization effect on low-frequency noise is limited, and a plurality of existing axial flow fans generally neglect the influence of vibration, so that extra noise is generated during equipment operation, and the strict requirements of various occasions on the low-frequency noise are difficult to meet.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, and in particular to an external noise reduction structure for axial flow fans. Background Technology

[0002] Axial flow fans are a type of fan that works by having air or other gases enter along a direction parallel to the fan's rotation axis and exit in the same direction. The airflow path through the fan is essentially straight and coaxial with the rotation axis. The main components of an axial flow fan include blades, a hub, and a motor. The blades are mounted on the hub, and when the motor drives the hub to rotate, the blades push the air, causing it to move axially. This type of fan typically has high flow rate and low pressure characteristics, making it suitable for applications requiring large amounts of ventilation but not high pressure requirements. Axial flow fans are commonly found in air conditioning systems, cooling towers, duct ventilation systems, and some industrial applications, such as ventilation in large factories or warehouses. They can also be used in smoke extraction systems or as part of household appliances. Axial flow fans are widely used.

[0003] Existing axial flow fans typically employ a single noise reduction method, such as a single layer of sound-absorbing material or sound insulation board. This method has limited effectiveness in optimizing low-frequency noise. Furthermore, many axial flow fans currently neglect the impact of vibration, resulting in additional noise during operation and making it difficult to meet the stringent low-frequency noise requirements of various applications.

[0004] To address this, an external noise reduction structure for axial flow fans is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide an external noise reduction structure for axial flow fans, which can solve the problem that existing axial flow fans usually use a single noise reduction method, such as a single layer of sound-absorbing material or sound insulation board, which has limited effect on optimizing low-frequency noise. In addition, many axial flow fans generally ignore the influence of vibration, resulting in additional noise during equipment operation, making it difficult to meet the strict requirements for low-frequency noise in various occasions.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an external noise reduction structure for an axial flow fan, comprising an axial flow fan body, wherein a protective structure is movably connected to the outer wall of the axial flow fan body, and a support structure is fixedly connected to the bottom of the axial flow fan body;

[0007] The protective structure includes a mounting frame, a fixing block, a noise reduction block, and a sealing block. The inner wall of the mounting frame is movably connected to the outer wall of the axial flow fan body. The inner side of the mounting frame is fixedly connected to the outer side of the fixing block. The inner wall of the fixing block is movably connected to the outer wall of the axial flow fan body. The outer wall of the fixing block is movably connected to the inner wall of the noise reduction block. The outer side of the noise reduction block is movably connected to the inner side of the mounting frame. The outer wall of the noise reduction block is movably connected to the inner wall of the sealing block. The outer side of the sealing block is movably bolted to the inner side of the mounting frame.

[0008] Preferably, a fixing plate is fixedly connected to the bottom of the axial flow fan body, and an mounting plate is fixedly connected to the bottom of the fixing plate.

[0009] Preferably, a connector is inserted into the inner wall of the mounting plate, a vibration damping pad is fixedly connected to the bottom of the connector, and the top of the vibration damping pad is movably connected to the bottom of the mounting plate.

[0010] Preferably, a lifting block is fixedly connected to the outer side of the mounting plate, and the bottom of the lifting block is movably connected to the top of the vibration isolation pad.

[0011] Preferably, the top of the mounting plate has a connection hole, and the inner wall of the connection hole is movably connected to the outer wall of the connector.

[0012] Preferably, the top of the lifting block has an installation hole, and the top of the mounting plate has a round hole.

[0013] Preferably, the mounting bracket is fixedly connected to the outside of the mounting bracket, and there are two mounting brackets, two fixing blocks, two noise reduction blocks, and two sealing blocks.

[0014] Preferably, a fixing ring is fixedly connected to the left side of the inner wall of the axial flow fan body, and a protective block is bolted to the left side of the fixing ring. The outer wall of the protective block is movably connected to the inner wall of the axial flow fan body.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The protective structure provided in this application, through the multi-layer combination design of fixed blocks, noise reduction blocks and sealing blocks, can achieve layered optimization processing for low-frequency, mid-frequency and high-frequency noise, significantly improving the noise suppression effect. At the same time, the overall modular design facilitates installation, maintenance and replacement, ensuring the long-term stability of the noise reduction function.

[0017] 2. The support structure set up in this application achieves stable support and efficient vibration isolation for the axial flow fan body through the synergistic effect of the fixing plate, mounting plate, connector and vibration isolation pad, effectively reducing the vibration transmission during the operation of the axial flow fan body, improving the operational reliability of the equipment, and the setting of the hoisting block makes the installation and hoisting operation of the axial flow fan body more convenient. At the same time, the modular design provides flexibility for multi-scenario applications. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the external noise reduction structure for the axial flow fan of this utility model;

[0019] Figure 2 This is a diagram showing the disassembled protective structure of this utility model;

[0020] Figure 3 This is a diagram showing the disassembled support structure of this utility model;

[0021] Figure 4 This is an exploded view of the connecting part of the axial flow fan body of this utility model;

[0022] Figure 5 This utility model Figure 1 A bottom view of the rear of the overall structure.

[0023] In the diagram, 1. Axial flow fan body; 2. Protective structure; 21. Mounting bracket; 22. Fixing block; 23. Noise reduction block; 24. Enclosure block; 3. Support structure; 31. Fixing plate; 32. Mounting plate; 33. Connecting piece; 34. Vibration isolation pad; 35. Lifting block; 4. Connecting hole; 5. Mounting hole; 6. Round hole; 7. Mounting piece; 8. Fixing ring; 9. Protective block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 The present invention provides the following technical solution:

[0026] An external noise reduction structure for an axial flow fan includes an axial flow fan body 1, a protective structure 2 movably connected to the outer wall of the axial flow fan body 1, and a support structure 3 fixedly connected to the bottom of the axial flow fan body 1.

[0027] The protective structure 2 includes a mounting frame 21, a fixing block 22, a noise reduction block 23, and a sealing block 24. The inner wall of the mounting frame 21 is movably connected to the outer wall of the axial flow fan body 1. The inner side of the mounting frame 21 is fixedly connected to the outer side of the fixing block 22. The inner wall of the fixing block 22 is movably connected to the outer wall of the axial flow fan body 1. The outer wall of the fixing block 22 is movably connected to the inner wall of the noise reduction block 23. The outer side of the noise reduction block 23 is movably connected to the inner side of the mounting frame 21. The outer wall of the noise reduction block 23 is movably connected to the inner wall of the sealing block 24. The outer side of the sealing block 24 is movably bolted to the inner side of the mounting frame 21.

[0028] In this embodiment: the support structure 3 at the bottom of the axial flow fan body 1 allows for stable installation of the axial flow fan body 1. The protective structure 2 on the outer wall of the axial flow fan body 1 is mounted on the outer wall of the axial flow fan body 1 via a mounting bracket 21. The fixing block 22 is fixed to the inner side of the mounting bracket 21 and stabilized on the outer wall of the axial flow fan body 1. The fixing block 22 is a micro-perforated metal plate, which can achieve the purpose of optimizing low-frequency noise. The noise reduction block 23 is made of porous sound-absorbing material and is set in the middle layer of the protective structure 2 to absorb mid-frequency noise. The sealing block 24 is connected to the mounting bracket 21 and forms the outermost layer of noise reduction. The sealing block 24 is a high-density composite board, which can isolate high-frequency noise. Through the cooperation between the structure and materials, the protective structure 2 can suppress noise leakage to the greatest extent.

[0029] Specifically, such as Figure 3 , Figure 4 , Figure 5 As shown, a fixing plate 31 is fixedly connected to the bottom of the axial flow fan body 1, and an mounting plate 32 is fixedly connected to the bottom of the fixing plate 31.

[0030] Specifically, such as Figure 3 , Figure 4 , Figure 5 As shown, a connector 33 is inserted into the inner wall of the mounting plate 32, and a vibration isolation pad 34 is fixedly connected to the bottom of the connector 33. The top of the vibration isolation pad 34 is movably connected to the bottom of the mounting plate 32.

[0031] Specifically, such as Figure 3 , Figure 5 , Figure 4 As shown, a lifting block 35 is fixedly connected to the outer side of the mounting plate 32, and the bottom of the lifting block 35 is movably connected to the top of the vibration isolation pad 34.

[0032] In this embodiment: the support structure 3 is provided, wherein the fixing plate 31 is fixed to the bottom of the axial flow fan body 1 to achieve the purpose of support, the mounting plate 32 fixed to the bottom of the fixing plate 31 can be used to install and fix the axial flow fan body 1, the lifting blocks 35 fixed on both sides of the mounting plate 32 can be used to lift the axial flow fan body 1, and the vibration isolation pad 34, which is made of rubber material and is stabilized at the bottom of the mounting plate 32 by the connecting piece 33, achieves the purpose of isolating the vibration of the axial flow fan body 1 to a certain extent.

[0033] Specifically, such as Figure 3 As shown, the top of the mounting plate 32 is provided with a connection hole 4, and the inner wall of the connection hole 4 is movably connected to the outer wall of the connector 33.

[0034] Specifically, such as Figure 1 , Figure 3 , Figure 4 As shown, the top of the lifting block 35 has an installation hole 5, and the top of the mounting plate 32 has a round hole 6.

[0035] In this embodiment: the connecting hole 4 opened in the mounting plate 32 is used for the connector 33 to be installed on the mounting plate 32, so as to stabilize the vibration isolation pad 34 set at the bottom of the mounting plate 32. The mounting hole 5 opened in the top of the lifting block 35 is used for the user to lift the axial flow fan body 1 through the lifting block 35. The round hole 6 opened in the top of the mounting plate 32 is used for the mounting plate 32 to be installed and fixed, so as to stabilize the axial flow fan body 1 through the fixing plate 31.

[0036] Specifically, such as Figure 1 , Figure 4 As shown, the mounting bracket 21 is fixedly connected to the outer side of the mounting bracket 21. There are two mounting brackets 21, two fixing blocks 22, two noise reduction blocks 23 and two sealing blocks 24.

[0037] Specifically, such as Figure 4 , Figure 5 As shown, a fixing ring 8 is fixedly connected to the left side of the inner wall of the axial flow fan body 1, and a protective block 9 is bolted to the left side of the fixing ring 8. The outer wall of the protective block 9 is movably connected to the inner wall of the axial flow fan body 1.

[0038] In this embodiment: by setting the mounting bracket 21 with the mounting component 7 fixed on the outside, the two protective structures 2 can be bolted to the outer wall of the axial flow fan body 1 to achieve the purpose of noise reduction when the axial flow fan body 1 is in use. By fixing the inner wall of the axial flow fan body 1 with the fixing ring 8, the protective block 9 can be installed on the inner wall of the axial flow fan body 1 to achieve the purpose of protecting the axial flow fan body 1.

[0039] Working Principle: When the axial flow fan body 1 is required, firstly, the support structure 3 at the bottom of the axial flow fan body 1 provides support. The fixing plate 31 is fixed to the bottom of the axial flow fan body 1. The mounting plate 32 fixed to the bottom of the fixing plate 31 allows the axial flow fan body 1 to be installed and fixed. The lifting blocks 35 fixed to both sides of the mounting plate 32 allow the axial flow fan body 1 to be lifted. Furthermore, the vibration isolation pads 34, made of rubber, are stabilized at the bottom of the mounting plate 32 by the connecting parts 33, achieving a certain degree of isolation from vibration of the axial flow fan body 1. This allows for a stable installation of the axial flow fan body 1. The protective structure 2 is set on the outer wall of the axial flow fan body 1. The protective structure 2 is installed on the outer wall of the axial flow fan body 1 through the mounting bracket 21. The fixing block 22 is fixed to the inner side of the mounting bracket 21 and stabilized on the outer wall of the axial flow fan body 1. The fixing block 22 is a micro-perforated metal plate, which can achieve the purpose of optimizing low-frequency noise. The noise reduction block 23 is made of porous sound-absorbing material and is set in the middle layer of the protective structure 2 to absorb mid-frequency noise. The sealing block 24 is connected to the mounting bracket 21 to form the outermost layer of noise reduction. The sealing block 24 is a high-density composite board to isolate high-frequency noise. Through the cooperation between the structure and materials, the protective structure 2 suppresses noise leakage to the greatest extent.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An external noise reduction structure for an axial flow fan, comprising an axial flow fan body (1), characterized in that: The outer wall of the axial flow fan body (1) is movably connected to a protective structure (2), and the bottom of the axial flow fan body (1) is fixedly connected to a support structure (3). The protective structure (2) includes a mounting frame (21), a fixing block (22), a noise reduction block (23), and a sealing block (24). The inner wall of the mounting frame (21) is movably connected to the outer wall of the axial flow fan body (1). The inner side of the mounting frame (21) is fixedly connected to the outer side of the fixing block (22). The inner wall of the fixing block (22) is movably connected to the outer wall of the axial flow fan body (1). The outer wall of the fixing block (22) is movably connected to the inner wall of the noise reduction block (23). The outer side of the noise reduction block (23) is movable to the inner side of the mounting frame (21). The outer wall of the noise reduction block (23) is movably connected to the inner wall of the sealing block (24). The outer side of the sealing block (24) is movably bolted to the inner side of the mounting frame (21).

2. The external noise reduction structure for an axial flow fan according to claim 1, characterized in that: A fixing plate (31) is fixedly connected to the bottom of the axial flow fan body (1), and an mounting plate (32) is fixedly connected to the bottom of the fixing plate (31).

3. The external noise reduction structure for an axial flow fan according to claim 2, characterized in that: A connector (33) is inserted into the inner wall of the mounting plate (32), and a vibration damping pad (34) is fixedly connected to the bottom of the connector (33). The top of the vibration damping pad (34) is movably connected to the bottom of the mounting plate (32).

4. The external noise reduction structure for an axial flow fan according to claim 3, characterized in that: A lifting block (35) is fixedly connected to the outside of the mounting plate (32), and the bottom of the lifting block (35) is movably connected to the top of the vibration isolation pad (34).

5. The external noise reduction structure for an axial flow fan according to claim 3, characterized in that: The top of the mounting plate (32) is provided with a connection hole (4), and the inner wall of the connection hole (4) is movably connected to the outer wall of the connector (33).

6. The external noise reduction structure for an axial flow fan according to claim 4, characterized in that: The top of the lifting block (35) is provided with an installation hole (5), and the top of the mounting plate (32) is provided with a round hole (6).

7. The external noise reduction structure for an axial flow fan according to claim 1, characterized in that: The mounting bracket (21) is fixedly connected to the outside of the mounting component (7), and there are two of each of the mounting bracket (21), fixing block (22), noise reduction block (23) and sealing block (24).

8. The external noise reduction structure for an axial flow fan according to claim 1, characterized in that: A fixing ring (8) is fixedly connected to the left side of the inner wall of the axial flow fan body (1), and a protective block (9) is bolted to the left side of the fixing ring (8). The outer wall of the protective block (9) is movably connected to the inner wall of the axial flow fan body (1).

Images