Low noise high speed fan

Abstract

The utility model relates to fan technical field discloses a low noise high -speed fan, including base and two groups of rubber pad, two groups rubber pad all are fixed in the top of base, the top of two groups rubber pad all is fixed with support block, the top of support block is fixed with shell, install the shell to one side of shell, the inner wall of install shell is fixed with sound absorption cotton, the utility model discloses through setting up rubber pad, silica gel pad and synthetic rubber pad can be convenient for the vibration of fan generation to carry out the buffer, through the vibration energy of self deformation absorption, can reduce the overall noise, simultaneously through setting up sound absorption cotton, sound absorption board, glass fiber cotton and sound absorption board can reduce the overall noise, when the sound wave enters the micropore, will be with the hole wall friction, collision, will sound energy convert into heat energy and consume, avoid the repeated reflection and superposition of sound wave in the airtight ventilation pipe, thereby greatly reduce the noise intensity in the pipeline.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically a low-noise high-speed fan. Background Technology

[0002] High-speed fans drive the blades to rotate at high speeds, generating strong airflow. They feature high air pressure, large flow rate, and fast response, and are widely used in pneumatic conveying, industrial dust removal, electronic cooling, and aerospace fields. They are the core equipment for efficient airflow control.

[0003] In some scenarios, it is necessary to overcome airflow resistance. The insufficient air pressure of low-speed fans will cause airflow to be unable to be effectively transmitted. Therefore, high-speed fans are required. However, the sound absorption effect of the inner wall of the casing in traditional high-speed fans is poor. At the same time, the vibration energy is transmitted to the entire fan structure through the rigid connection between the outer shell and the base, causing the outer shell, support and other components to resonate. At the resonance frequency, the structural amplitude is significantly amplified, forming a low-frequency "humming" noise. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise, high-speed fan to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-noise high-speed fan, comprising a base and two sets of rubber pads, wherein both sets of rubber pads are fixed to the top of the base, and a support block is fixed to the top of each set of rubber pads, and a shell is fixed to the top of the support block. The mounting shell is installed on one side of the outer shell. The inner wall of the mounting shell is fixed with sound-absorbing cotton. The inner wall of the outer shell is fixed with a sound-absorbing plate and glass fiber cotton, and the sound-absorbing plate and glass fiber cotton are designed in a ring shape.

[0006] Preferably, a silicone pad is fixed to the top of the base, and a synthetic rubber pad is fixed to the top of the silicone pad.

[0007] Preferably, the top of the synthetic rubber pad is fixed with a support frame, and the number of support frames is set to multiple sets.

[0008] Preferably, a connecting plate is fixed to the top of the support frame, and the top of the connecting plate is fixedly connected to the outer side of the outer shell.

[0009] Preferably, a guide frame is fixed to one side of the outer shell, and a sound-absorbing plate is fixed to the inner wall of the guide frame, and the sound-absorbing plate is made of glass wool.

[0010] Preferably, a ventilation pipe is installed on the inner wall of the guide frame, and one end of the ventilation pipe is connected to the inner wall of the outer shell. A cover is fixed to one side of the guide frame by bolts.

[0011] Preferably, a drive mechanism for driving airflow is fixed to the top of the guide frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes rubber pads, silicone pads, and synthetic rubber pads to buffer vibrations generated by the fan. By absorbing vibration energy through their own deformation, they reduce the transmission of vibration to the base and external environment. Simultaneously, they prevent direct collision and friction between the metal outer shell and the base, reducing "structural friction noise" at its source and lowering overall noise. Furthermore, the use of sound-absorbing cotton, sound-absorbing panels, fiberglass cotton, and sound-absorbing boards further reduces overall noise. The porous structure of the sound-absorbing cotton and fiberglass cotton captures sound waves generated by high-speed airflow. When sound waves enter the micropores, they rub and collide with the pore walls, converting sound energy into heat energy and dissipating it. This prevents sound waves from repeatedly reflecting and superimposing within the sealed ventilation duct, thereby significantly reducing the noise intensity within the duct. Attached Figure Description

[0013] Figure 1 A schematic diagram of a preferred embodiment of the low-noise high-speed fan provided by this utility model; Figure 2 A schematic diagram of the outer shell and mounting shell structure provided by this utility model; Figure 3 A schematic diagram of the base and rubber pad structure provided by this utility model; Figure 4 for Figure 2 A magnified structural diagram of point A shown.

[0014] In the diagram: 1. Base; 2. Rubber pad; 3. Support block; 4. Outer shell; 5. Mounting shell; 6. Sound-absorbing cotton; 7. Sound-absorbing panel; 8. Fiberglass cotton; 9. Silicone pad; 10. Synthetic rubber pad; 11. Support frame; 12. Connecting plate; 13. Guide frame; 14. Silencing plate; 15. Ventilation duct; 16. Cover; 17. Drive mechanism. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-4As shown, a low-noise high-speed fan includes a base 1 and two sets of rubber pads 2. Both sets of rubber pads 2 are fixed to the top of the base 1, and a support block 3 is fixed to the top of each set of rubber pads 2. A housing 4 is fixed to the top of the support block 3. The base 1 serves as the supporting foundation for the entire fan, bearing the weight of all the upper structures, ensuring the stability of the fan during installation, and preventing additional vibrations caused by the shift of the center of gravity during operation. The rubber pads 2 are installed between the base 1 and the support block 3, using the high elasticity of rubber to absorb the vibration transmitted by the support block 3. It should be noted that the vibration mainly comes from the high-speed operation of the drive mechanism 17. This blocks the transmission of vibration to the base 1 and the mounting surface, reducing structural resonance noise. The support block 3 is used to connect the rubber pads 2 and the housing 4, acting as an "intermediate support." It not only fixes the position of the housing 4 but also provides a stable force carrier for the rubber pads 2, preventing the housing 4 from directly contacting the base 1 and causing direct vibration transmission. The housing 4 is used to isolate the noise from the components during operation and to provide a mounting carrier for the sound-absorbing panel 7 and the fiberglass cotton 8. The noise reduction material on the inner wall further weakens the internal noise.

[0017] Mounting housing 5 is installed on one side of housing 4. Sound-absorbing cotton 6 is fixed to the inner wall of mounting housing 5. Sound-absorbing panels 7 and fiberglass cotton 8 are fixed to the inner wall of housing 4, and the sound-absorbing panels 7 and fiberglass cotton 8 are designed in a ring shape. Mounting housing 5, installed on one side of housing 4, is mainly used to accommodate or assist in the installation of auxiliary components of the fan. The sound-absorbing cotton 6 on its inner wall can specifically absorb local noise in that area, preventing noise leakage from the side. The sound-absorbing cotton 6, fixed to the inner wall of mounting housing 5, captures sound waves through its porous structure, converting sound energy into heat energy for dissipation, weakening local noise inside mounting housing 5, and supplementing the overall noise reduction effect of housing 4, especially for mid-to-high frequency noise. The sound-absorbing panels 7 cover a large area inside housing 4, absorbing structural vibration noise generated by the motor and fan blades. On the other hand, to suppress the "secondary noise" generated by the resonance of the outer shell 4 itself, the glass fiber cotton 8 and the sound-absorbing panel 7 are fixed together on the inner wall of the outer shell 4. It has high temperature resistance and can adapt to the heat generated by the motor in the drive mechanism 17. It can focus on absorbing the mid-to-high frequency aerodynamic noise in the high temperature environment inside the outer shell 4, such as the airflow noise generated by the high speed rotation of the fan blades, and further reduce the noise intensity in the core area. It should be noted that when the sound wave propagates to the surface of the sound-absorbing material, it will quickly penetrate into the interior of the material. The interior of the sound-absorbing material often has a large number of fiber structures or dense pore networks. During the propagation of the sound wave inside the material, it will continuously collide with the fibers or pore walls. Each collision is like a small "impact", which makes the energy of the sound wave gradually disperse and transfer.

[0018] A silicone pad 9 is fixed to the top of the base 1, and a synthetic rubber pad 10 is fixed to the top of the silicone pad 9. The silicone pad 9 is located between the base 1 and the synthetic rubber pad 10, which supplements the shock absorption effect of the rubber pad 2. The silicone is elastic and resistant to aging, and can absorb the residual vibration between the base 1 and the support frame 11. The synthetic rubber pad 10 is wear-resistant and fatigue-resistant, and can withstand the pressure and vibration transmitted by the support frame 11 for a long time, further buffering the vibration transmitted from the outer shell 4 to the base 1 through the connecting plate 12 and the support frame 11.

[0019] A support frame 11 is fixed to the top of the synthetic rubber pad 10, and the number of support frames 11 is set to multiple sets; a connecting plate 12 is fixed to the top of the support frame 11, and the top of the connecting plate 12 is fixedly connected to the outside of the outer shell 4; the support frame 11 distributes the support plate 12, disperses the weight and vibration transmitted by the outer shell 4, and avoids local force concentration that may cause deformation of the base 1 or the outer shell 4; at the same time, it improves the connection stability between the outer shell 4 and the base 1, prevents the outer shell 4 from shifting when the fan is running, and the connecting plate 12 evenly transmits the weight of the outer shell 4 to multiple sets of support frames 11, avoiding the outer shell 4 relying only on the support block 3 for single-point support, further improving the stability of the installation of the outer shell 4, and reducing the vibration and noise caused by uneven force on the outer shell 4.

[0020] A guide frame 13 is fixed to one side of the outer casing 4. A sound-absorbing plate 14, made of glass wool, is fixed to the inner wall of the guide frame 13. A ventilation pipe 15 is installed on the inner wall of the guide frame 13, and one end of the ventilation pipe 15 is connected to the inner wall of the outer casing 4. A cover 16 is fixed to one side of the guide frame 13 by bolts. The guide frame 13 guides the airflow from the outer casing 4 into the ventilation pipe 15 to ensure a stable airflow path. It also provides a fixing space for the sound-absorbing plate 14 to further reduce noise at the airflow outlet. It is noted that both the guide frame 13 and the ventilation pipe 15 are set in two sets, one set for... One set is for air intake, and the other set is for air exhaust. The sound-absorbing plate 14 is made of glass wool, which can absorb the aerodynamic noise generated when the airflow enters the ventilation pipe 15 from the outer shell 4. It should be noted that since there are two sets of guide frame 13, sound-absorbing plate 14 and ventilation pipe 15, they can absorb the aerodynamic noise generated when the airflow exits the ventilation pipe 15 from the outer shell 4, and prevent the noise from spreading outward with the airflow through the ventilation pipe 15. At the same time, the glass wool material is resistant to airflow erosion and is not easily deformed after long-term use. The ventilation pipe 15 is the airflow output and input channel of the fan. When the cover 16 is opened, the sound-absorbing plate 14 inside the guide frame 13 can be cleaned and tidied.

[0021] The top of the guide frame 13 is fixed with a drive mechanism 17 for driving airflow; the drive mechanism 17 includes a motor and a fan blade, which generates negative or positive pressure by driving the fan blade to rotate at high speed, thereby pushing the airflow to flow in the outer casing 4 and the ventilation pipe 15, and is the power source for the fan to achieve high-speed air delivery or exhaust.

[0022] Working Principle: When the power is turned on, the motor in the drive mechanism 17 starts, driving the fan blades to rotate. At this time, the base 1 serves as the supporting foundation for the entire fan, stably bearing the weight of all the upper structures, ensuring that the fan will not shake due to the shift in the center of gravity at the moment of startup. Two sets of rubber pads 2 are located between the base 1 and the support block 3. Utilizing the high elasticity of rubber, they begin to absorb the impending vibration. At the same time, the silicone pad 9 and the synthetic rubber pad 10 also enter a standby state. The silicone pad 9, with its good elasticity and aging resistance, is ready to absorb any residual vibration that may occur. The synthetic rubber pad 10, with its wear-resistant and fatigue-resistant properties, is ready to withstand subsequent pressure and vibration. The motor speed gradually increases, and the fan blades rotate at high speed. With the cooperation of the guide frame 13 and the ventilation pipe 15, a stable airflow channel is formed. One set of ventilation pipes 1 5 is responsible for drawing outside air into the outer shell 4, while another set expels the air from the outer shell 4, thus achieving airflow circulation. During this process, the sound-absorbing plate 14 uses the porous structure of glass wool to absorb the aerodynamic noise generated during airflow. When the fan is running, the vibration generated by the high-speed operation of the drive mechanism 17 is mostly absorbed by the rubber pad 2, blocking the transmission to the base 1 and the mounting platform. The support block 3 serves as an intermediate support to stabilize the position of the outer shell 4. The sound-absorbing plate 7 and glass fiber cotton 8 on the inner wall of the outer shell 4 play their roles. The sound-absorbing plate 7 absorbs structural vibration noise and the "secondary noise" generated by the resonance of the outer shell 4. The glass fiber cotton 8 is resistant to high temperature and absorbs mid-to-high frequency aerodynamic noise in high-temperature environments. At the same time, the support frame 11 distributes the support connecting plate 12, dispersing the weight and vibration of the outer shell 4 and reducing the vibration noise caused by uneven force.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-noise, high-speed fan, comprising a base (1), characterized in that, Also includes: Two sets of rubber pads (2) are fixed to the top of the base (1), and a support block (3) is fixed to the top of each set of rubber pads (2). A shell (4) is fixed to the top of the support block (3). The mounting shell (5) is installed on one side of the outer shell (4). The inner wall of the mounting shell (5) is fixed with sound-absorbing cotton (6). The inner wall of the outer shell (4) is fixed with sound-absorbing plate (7) and glass fiber cotton (8), and the sound-absorbing plate (7) and glass fiber cotton (8) are designed in a ring shape.

2. The low-noise high-speed fan according to claim 1, characterized in that: A silicone pad (9) is fixed to the top of the base (1), and a synthetic rubber pad (10) is fixed to the top of the silicone pad (9).

3. The low-noise high-speed fan according to claim 2, characterized in that: The top of the synthetic rubber pad (10) is fixed with a support frame (11), and the number of support frames (11) is set to multiple sets.

4. A low-noise high-speed fan according to claim 3, characterized in that: The top of the support frame (11) is fixed with a connecting plate (12), and the top of the connecting plate (12) is fixedly connected to the outside of the outer shell (4).

5. A low-noise high-speed fan according to claim 1, characterized in that: A guide frame (13) is fixed on one side of the outer shell (4), and a sound-absorbing plate (14) is fixed on the inner wall of the guide frame (13), and the sound-absorbing plate (14) is made of glass wool.

6. A low-noise high-speed fan according to claim 5, characterized in that: The inner wall of the guide frame (13) is equipped with a ventilation pipe (15), and one end of the ventilation pipe (15) is connected to the inner wall of the outer shell (4). A cover (16) is fixed to one side of the guide frame (13) by bolts.

7. A low-noise high-speed fan according to claim 5, characterized in that: The top of the guide frame (13) is fixed with a drive mechanism (17) for driving the airflow.

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