Noise reduction and shock absorption fan

Abstract

The utility model belongs to fan technical field, concretely relates to a noise reduction shock attenuation fan, including fan main part, the air inlet of fan main part is fixed with the horn cover, the one end of horn cover stretches into the inside of fan main part and is provided with the sawtooth structure along the circumference, the inside of horn cover is arrayed with a plurality of fairing along the circumference direction, the side of fairing is opened and is provided with a plurality of first sound absorbing hole, the inside center of horn cover is equipped with the gradual change bullet block, the diameter of gradual change bullet block gradually increases along the airflow direction towards the inside of fan main part, the gradual change bullet block and horn cover form an annular air inlet channel, the side of gradual change bullet block is located in the fan main part and is equipped with the arc lip edge for the flow guide. The utility model can pass through the cooperation design of many components, realizes the turbulent flow suppression of air intake, the noise absorption of multiple positions, motor shaft vibration buffering, reaches the purpose that promotes the air intake efficiency, reduces the overall noise, strengthens the operation stability and prolongs the service life.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically relating to a noise-reducing and vibration-damping fan. Background Technology

[0002] As a core device for gas transport and ventilation, fans have been widely used in industrial plant ventilation and cooling, civil central air conditioning, laboratory environmental control, and medical equipment. With increasing environmental protection requirements and users' emphasis on user experience, noise, vibration, and energy efficiency issues during fan operation have become increasingly prominent, becoming key bottlenecks restricting their application in demanding scenarios.

[0003] Problems with existing technology: Traditional fans often use a straight-tube or simple flared-outlet air intake structure. When the airflow enters the fan, it is easy to form irregular turbulence at the edge of the air intake. This not only generates high-frequency airflow noise, but also causes uneven airflow distribution, resulting in an imbalance of forces on the fan impeller. Some areas are overloaded with airflow, while others are underloaded, directly causing a decrease in air intake efficiency. At the same time, the turbulence impacting the impeller blades can also cause low-frequency vibration, forming a "noise-vibration" coupled interference. Utility Model Content

[0004] The purpose of this utility model is to provide a noise reduction and vibration damping fan that can achieve the goals of suppressing airflow turbulence, absorbing noise at multiple locations, and buffering motor shaft vibration through the collaborative design of multiple components, thereby improving airflow efficiency, reducing overall noise, enhancing operational stability, and extending service life.

[0005] The specific technical solution adopted by this utility model is as follows: A noise reduction and vibration damping fan includes a fan body, an air inlet of the fan body is fixed with a horn cover, and one end of the horn cover that extends into the fan body is provided with a serrated structure along the circumference. The inner side of the speaker cover has multiple guide ribs arranged in a circumferential direction, and multiple first sound-absorbing holes are opened through one side of the guide ribs. A gradient bullet block is provided at the center of the inside of the horn cover. The diameter of the gradient bullet block gradually increases towards the inside of the fan body along the airflow direction. An annular air intake channel is formed between the gradient bullet block and the horn cover.

[0006] One side of the gradient warhead block is located inside the fan body and has an arc-shaped lip for guiding the airflow.

[0007] The air outlet of the main body of the fan is provided with honeycomb sound-absorbing cotton.

[0008] The inner and outer sides of the fan body are provided with soundproof covers corresponding to the motor shaft. The soundproof covers enclose the rotating connection between the motor shaft and the fan body. The outer wall of the soundproof covers has a plurality of second sound-absorbing holes arranged in a circumferential direction.

[0009] A damping rubber ring is provided at the rotatable connection between the soundproof cover and the motor shaft. The damping rubber ring is fixedly sleeved on the motor shaft, and its outer wall is rotatably connected to the fan body through a bearing sleeve.

[0010] The technical effects achieved by this utility model are as follows: The speaker cover of this invention can expand the air intake area and improve the air intake efficiency; the annular air intake channel formed by the gradient bullet block and the speaker cover can smoothly transition the airflow, effectively reduce turbulence and reduce turbulence noise; the sawtooth structure can divide the large-scale vortex generated during air intake into multiple small-scale vortices, converting low-frequency noise into high-frequency noise and improving the overall auditory experience; the guide rib guides the airflow to flow stably, and the first sound-absorbing hole directly absorbs airflow noise, further weakening the noise intensity during the air intake stage.

[0011] The soundproof cover of this invention seals the rotating connection between the motor shaft and the fan body, preventing vibration noise from spreading outward. The second sound-absorbing hole absorbs residual noise in the enclosed space, achieving dual noise control. The damping rubber ring not only absorbs the vibration generated by the rotation of the motor shaft and eliminates vibration noise, but also controls the axial balance of the motor shaft, reduces additional vibration and noise caused by axial offset, improves the rotational stability of the motor shaft, and extends the service life of the fan. Attached Figure Description

[0012] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the horn cover and the gradient bullet block of this utility model; Figure 4 This is a cross-sectional structural diagram of the soundproof cover of this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 1. Fan body; 2. Horn cover; 3. Serrated structure; 4. Guide rib; 5. First sound absorption hole; 6. Gradient bullet block; 7. Arc-shaped lip; 8. Honeycomb sound-absorbing cotton; 9. Sound insulation cover; 10. Damping rubber ring; 11. Second sound absorption hole. Detailed Implementation

[0014] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0015] like Figures 1-3 As shown, a noise reduction and vibration damping fan includes a fan body 1, an air inlet of the fan body 1 is fixed with a horn cover 2, and one end of the horn cover 2 that extends into the fan body 1 is provided with a serrated structure 3 along the circumference. The inner side of the speaker cover 2 has multiple guide ribs 4 arranged in a circumferential direction. Multiple first sound absorption holes 5 are opened through one side of the guide ribs 4. The diameter of the first sound absorption holes 5 is set to 3-5mm and the hole spacing is set to 8-10mm, which can effectively absorb airflow noise. A gradient bullet block 6 is provided at the center of the inside of the horn cover 2. The diameter of the gradient bullet block 6 gradually increases towards the inside of the fan body 1 along the airflow direction, and an annular air intake channel is formed between the gradient bullet block 6 and the horn cover 2.

[0016] Based on the above structure, the horn cover 2 can expand the air intake area and improve the air intake efficiency. In conjunction with the gradient bullet block 6, it can smoothly transition the airflow entering the annular air intake channel, effectively reducing turbulence generated during the airflow process, reducing turbulence noise, and ensuring that the airflow flows stably into the fan, thereby improving the fan's air intake efficiency and operational stability. The sawtooth structure 3 can divide large-scale vortices into multiple small-scale vortices, converting low-frequency noise into high-frequency noise, thereby improving the overall auditory experience. The gradient bullet block 6 can effectively reduce airflow turbulence. As shown in Figure 3, one side of the gradient bullet block 6 is provided with an arc-shaped lip 7 for guiding the flow inside the main body 1 of the fan.

[0017] According to the above structure, the arc-shaped lip 7 extends into the fan body 1 and bends outward in an arc shape with a bending angle of 30-45°. This facilitates the guidance of airflow, allowing the airflow to blow towards the fan impeller inside the fan body 1, reducing the impact noise between the airflow and the impeller, while improving the impeller's air delivery efficiency and ensuring the overall operating performance of the fan.

[0018] like Figure 1 As shown, the inner side of the air outlet of the fan body 1 is provided with honeycomb sound-absorbing cotton 8. The honeycomb sound-absorbing cotton 8 is made of polyurethane material, with a thickness of 15-20mm and a honeycomb pore diameter of 5-8mm, which effectively blocks the noise of the air outlet.

[0019] Based on the above structure, the honeycomb sound-absorbing cotton 8 can effectively reduce the noise at the air outlet of the main body of the fan 1, reduce noise interference to the surrounding environment, and further improve the overall noise reduction effect of the equipment.

[0020] Soundproof covers 9 are provided on the inner and outer sides of the fan body 1 corresponding to the position of the motor shaft. The soundproof covers 9 enclose the rotating connection between the motor shaft and the fan body 1. The outer wall of the soundproof covers 9 has a plurality of second sound-absorbing holes 11 arranged in a circumferential direction. like Figure 1 and Figure 4 As shown, a damping rubber ring 10 is provided at the rotatable connection between the soundproof cover 9 and the motor shaft. The damping rubber ring 10 is fixedly sleeved on the motor shaft, and its outer wall is rotatably connected to the fan body 1 through a bearing sleeve.

[0021] According to the above structure, the soundproof cover 9 and the second sound-absorbing hole 11 can seal the rotating connection between the motor shaft and the fan body 1, effectively preventing the vibration noise generated at this part from spreading outward. At the same time, the multiple second sound-absorbing holes 11 arrayed along the circumferential direction on the outer wall of the soundproof cover 9 can absorb the noise in the enclosed space, further weakening the noise intensity and achieving dual control of the noise at the motor shaft connection. The damping rubber ring 10 is made of a material with good shock absorption and noise reduction performance, which can effectively absorb the vibration generated during the rotation of the motor shaft and eliminate vibration noise, achieving the dual effect of noise reduction and shock absorption. At the same time, the damping rubber ring 10 can also control the axial balance of the motor shaft, reduce the additional vibration and noise caused by the axial offset of the motor shaft, improve the stability of the motor shaft rotation, and extend the service life of the fan.

[0022] The working principle of this utility model is as follows: airflow enters through the annular air inlet channel of the horn cover 2, the sawtooth structure 3 divides the large-scale vortex, the guide rib 4 and the first sound absorption hole 5 guide the sound absorption, the gradient bullet block 6 reduces turbulence, and the arc-shaped lip 7 guides the airflow to the impeller; the honeycomb sound-absorbing cotton 8 at the air outlet reduces exhaust noise; the sound insulation cover 9, the second sound absorption hole 11 and the damping rubber ring 10 work together to eliminate the vibration noise of the motor shaft rotation, realize multi-dimensional noise reduction and vibration reduction, and improve equipment performance and user experience.

[0023] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A noise-reducing and vibration-damping fan, comprising a fan body (1), characterized in that: The air inlet of the fan body (1) is fixed with a horn cover (2), and the end of the horn cover (2) that extends into the fan body (1) is provided with a serrated structure (3) along the circumference. The inner side of the speaker cover (2) is arranged with multiple guide ribs (4) along the circumferential direction, and multiple first sound-absorbing holes (5) are opened through one side of the guide ribs (4). The horn cover (2) has a gradient bullet block (6) at its center. The diameter of the gradient bullet block (6) increases gradually towards the inside of the fan body (1) along the airflow direction. The gradient bullet block (6) and the horn cover (2) form an annular air intake channel.

2. The noise reduction and vibration damping fan according to claim 1, characterized in that: The gradient warhead block (6) has an arc-shaped lip (7) for guiding the flow inside the fan body (1) on one side.

3. The noise reduction and vibration damping fan according to claim 1, characterized in that: The air outlet of the main body of the fan (1) is provided with honeycomb sound-absorbing cotton (8).

4. The noise reduction and vibration damping fan according to claim 1, characterized in that: The inner and outer sides of the fan body (1) are provided with soundproof covers (9) corresponding to the positions of the motor shaft. The soundproof covers (9) enclose the rotating connection between the motor shaft and the fan body (1) between the two. The outer wall of the soundproof covers (9) has a plurality of second sound-absorbing holes (11) arranged in a circumferential direction.

5. A noise-reducing and vibration-damping fan according to claim 4, characterized in that: The soundproof cover (9) is provided with a damping rubber ring (10) at the rotatable connection between the motor shaft and the soundproof cover (9). The damping rubber ring (10) is fixedly sleeved on the motor shaft, and its outer wall is rotatably connected to the fan body (1) through a bearing sleeve.

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