Axial flow fan silencing box

Abstract

The utility model relates to the technical field of noise reduction of axial flow fans, and discloses an axial flow fan noise reduction box which comprises a noise reduction box body, noise reduction cylinders are fixedly connected to the left side and the right side of the noise reduction box body, noise absorption hole plates are fixedly connected to the inner walls of the noise reduction cylinders, and noise absorption cotton is fixedly connected between the noise absorption hole plates and the noise reduction cylinders. A filtering mechanism is arranged on the inner wall of the sound-absorbing pore plate, vibration generated by the noise-reducing supporting mechanism and the axial flow fan are guided to move along a sliding block and a sliding way, so that springs on the upper side and the lower side of the noise-reducing supporting mechanism contract or stretch out, and then a damper and a rubber supporting block of the noise-reducing supporting mechanism move; when the noise reduction box is used, the springs on the upper side and the lower side of the noise reduction box contract or stretch out or stretch out, then the dampers and the rubber supporting blocks absorb and relieve the vibration, the vibration is prevented from being directly transmitted to the draught fan and the surrounding structure, the situation that the generated vibration interferes with the noise reduction effect of the noise reduction box is avoided, and the overall noise reduction performance of the noise reduction box is improved.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan silencing technology, specifically to an axial flow fan silencing box. Background Technology

[0002] During operation, axial flow fans generate noise due to blade rotation, airflow disturbance, and mechanical vibration. This noise not only interferes with the working environment, affecting personnel comfort and work efficiency, but may also have a negative impact on the surrounding environment and residents' lives. Therefore, noise control of axial flow fans is necessary, and silencers, as an effective noise control method, are widely used in the noise control of axial flow fans.

[0003] According to the patent website, a noise reduction device for an axial flow fan (authorization announcement number CN 220354154 U) is described as follows: "An axial flow fan noise reduction device includes an axial flow fan body, fan blades are arranged inside the axial flow fan body, a gas filter screen is arranged on the outer surface of the axial flow fan body, a filter mechanism is arranged on the outer surface of the gas filter screen, and the filter mechanism includes a silencer cylinder arranged on the outer surface of the axial flow fan body, and the filter screen is arranged on the outer surface of the silencer cylinder."

[0004] Regarding the above description, the applicant believes the following issues exist:

[0005] In this practical application, a filter screen is installed on the outer surface of the silencer. While the silencer reduces noise from the axial flow fan body, the filter screen can also filter large particles of impurities in the air drawn into the axial flow fan body. However, in actual use, the axial flow fan will generate vibrations during operation. Since there is no vibration damping device to isolate and absorb these vibrations, they will be directly transmitted to the fan itself and the surrounding structure. Moreover, the vibrations will interfere with the noise reduction effect of the silencer box, resulting in a significant reduction in noise reduction performance. Therefore, it is necessary to improve the axial flow fan silencer box. Utility Model Content

[0006] The purpose of this utility model is to provide a silencer box for axial flow fans to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an axial flow fan silencer box, comprising a silencer box body, with silencer cylinders fixedly connected to the left and right sides of the silencer box body, a sound-absorbing perforated plate fixedly connected to the inner wall of the silencer cylinder, sound-absorbing cotton fixedly connected between the sound-absorbing perforated plate and the silencer cylinder, a filter mechanism provided on the inner wall of the sound-absorbing perforated plate, a noise reduction support mechanism provided inside the silencer box body, and an axial flow fan provided inside the noise reduction support mechanism;

[0008] The noise reduction support mechanism includes a noise reduction component and a support component, wherein the support component is disposed outside the noise reduction component;

[0009] The noise reduction component includes a partition plate, which is fixedly connected to the inner wall of the silencer box body. Sound insulation cotton is fixedly connected between the partition plate and the silencer box body. Slide rails are fixedly connected to the front and rear inner sides of the partition plate. A slider is slidably connected to the inner side of the slide rails. A damper is rotatably connected to the inner wall of the partition plate. A fixing block is rotatably connected to the output end of the damper. Springs are fixedly connected to the inner sides of the top and bottom of the partition plate to reduce the noise of the axial flow fan during operation.

[0010] Preferably, a groove is provided at the position corresponding to the slider of the slide rail, and the slider is slidably connected in the groove to facilitate restricting the movement of the slider.

[0011] Preferably, the partition plate has a hole at the corresponding position of the damper, and the damper is rotatably connected in the hole to facilitate the absorption of energy brought by vibration.

[0012] Preferably, the support assembly includes a rubber support block, which is fixedly connected to the inner side of the bottom of the partition plate. A support cylinder is fixedly connected to the top of the rubber support block, a clip is fixedly connected to the inner wall of the support cylinder, and a support frame is fixedly connected to the inner wall of the support cylinder, which facilitates improving the fixing effect of the axial flow fan.

[0013] Preferably, the fixing block is fixedly connected to the top and bottom of the support cylinder, the slider is fixedly connected to the front and rear sides of the support cylinder, and the axial flow fan is fixedly connected to the outside of the support frame, which facilitates the fixing of the axial flow fan.

[0014] Preferably, the filtration mechanism includes a fixed sleeve, which is fixedly connected to the inner top of the sound-absorbing perforated plate. A locking block is inserted into the inner side of the fixed sleeve, and a bolt is threadedly connected between the locking block and the fixed sleeve. A filter plate is fixedly connected to the bottom of the locking block, and a positioning block is fixedly connected to the bottom of the filter plate. A positioning sleeve is fixedly connected to the inner bottom of the partition plate, which facilitates the filtration of impurities in the air.

[0015] Preferably, the positioning sleeve has a groove at the position corresponding to the positioning block, and the positioning block is inserted into the groove to facilitate positioning of the filter plate.

[0016] Compared with the prior art, the present invention provides an axial flow fan silencer box, which has the following beneficial effects:

[0017] 1. The axial flow fan silencer box, through the noise reduction support mechanism, causes the axial flow fan to move along the slider and guide rail when it vibrates. This causes the springs on the upper and lower sides to contract or extend, which in turn causes the damper and rubber support block to move. The damper and rubber support block absorb and mitigate these vibrations, preventing them from being directly transmitted to the fan itself and the surrounding structure. This avoids the vibrations interfering with the silencer box's noise reduction effect and improves the overall noise reduction performance of the device.

[0018] 2. The axial flow fan silencer box, through its set filtration mechanism, filters the air drawn in by the axial flow fan during operation, and further prevents dust from adhering to the axial flow fan. This allows the device to filter solid impurities in the air and prevent floating dust from adhering to the internal sound-absorbing cotton and affecting the sound-absorbing effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0021] Figure 2 This is a front sectional view of the present invention.

[0022] Figure 3 This is a schematic diagram of the left side structure of the noise reduction support mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the left side structure of the noise reduction component of this utility model;

[0024] Figure 5 This is a schematic diagram of the left side structure of the support component of this utility model;

[0025] Figure 6 This is a schematic diagram of the unfolded structure of the filter mechanism of this utility model on the left side.

[0026] In the diagram: 1. Silencer body; 2. Silencer cylinder; 3. Sound-absorbing perforated plate; 4. Sound-absorbing cotton; 5. Filtering mechanism; 6. Axial flow fan; 7. Noise reduction support mechanism; 71. Noise reduction component; 72. Support component; 711. Partition plate; 712. Sound insulation cotton; 713. Slide rail; 714. Slider; 715. Damper; 716. Fixing block; 717. Spring; 721. Rubber support block; 722. Support cylinder; 723. Clip; 724. Support frame; 51. Fixing sleeve; 52. Clip; 53. Bolt; 54. Filter plate; 55. Positioning block; 56. Positioning sleeve. Detailed Implementation

[0027] 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.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example 1:

[0030] Based on existing technology, the axial flow fan described herein generates vibration during operation. Since there is no vibration damping device for isolation and absorption, this vibration is directly transmitted to the fan itself and surrounding structures. Furthermore, the resulting vibration interferes with the noise reduction effect of the silencer box, significantly reducing its noise reduction performance. For further information on this issue, please refer to [link / reference needed]. Figure 1-6 This utility model provides a technical solution: an axial flow fan silencer box, including a silencer box body 1, silencer cylinders 2 fixedly connected to the left and right sides of the silencer box body 1, sound-absorbing perforated plates 3 fixedly connected to the inner wall of the silencer cylinders 2, sound-absorbing cotton 4 fixedly connected between the sound-absorbing perforated plates 3 and the silencer cylinders 2, a filter mechanism 5 provided on the inner wall of the sound-absorbing perforated plates 3, a noise reduction support mechanism 7 provided inside the silencer box body 1, and an axial flow fan 6 provided inside the noise reduction support mechanism 7;

[0031] The noise reduction support mechanism 7 includes a noise reduction component 71 and a support component 72, with the support component 72 disposed outside the noise reduction component 71;

[0032] The noise reduction component 71 includes a partition 711, which is fixedly connected to the inner wall of the silencer body 1. Sound insulation cotton 712 is fixedly connected between the partition 711 and the silencer body 1. Slide rails 713 are fixedly connected to the inner sides of the front and rear sides of the partition 711. A slider 714 is slidably connected to the inner side of the slide rails 713. A damper 715 is rotatably connected to the inner wall of the partition 711. A fixing block 716 is rotatably connected to the output end of the damper 715. Springs 717 are fixedly connected to the inner sides of the top and bottom of the partition 711 to reduce the noise of the axial flow fan 6 during operation.

[0033] Furthermore, grooves are provided at the corresponding positions of the slide rail 713 and the slider 714, and the slider 714 is slidably connected in the groove, which facilitates restricting the movement of the slider 714.

[0034] Furthermore, the partition 711 and the damper 715 are provided with holes at corresponding positions, and the damper 715 is rotatably connected in the holes to facilitate the absorption of energy brought by vibration.

[0035] Furthermore, the support assembly 72 includes a rubber support block 721, which is fixedly connected to the inner bottom of the partition 711. A support cylinder 722 is fixedly connected to the top of the rubber support block 721. A clip 723 is fixedly connected to the inner wall of the support cylinder 722, and a support frame 724 is fixedly connected to the inner wall of the support cylinder 722, which facilitates improving the fixing effect of the axial flow fan 6.

[0036] Furthermore, the fixing block 716 is fixedly connected to the top and bottom of the support cylinder 722, and the slider 714 is fixedly connected to the front and rear sides of the support cylinder 722, and the axial flow fan 6 is fixedly connected to the outside of the support frame 724, so as to facilitate the fixing of the support axial flow fan 6.

[0037] Example 2:

[0038] To address the issue of filtering airborne impurities and preventing dust from affecting noise reduction performance using existing technologies, please refer to [link / reference needed]. Figure 6 Furthermore, in conjunction with Embodiment 1, the filter mechanism 5 includes a fixed sleeve 51, which is fixedly connected to the inner top of the sound-absorbing plate 3. A locking block 52 is inserted into the inner side of the fixed sleeve 51, and a bolt 53 is threadedly connected between the locking block 52 and the fixed sleeve 51. A filter plate 54 is fixedly connected to the bottom of the locking block 52, and a positioning block 55 is fixedly connected to the bottom of the filter plate 54. A positioning sleeve 56 is fixedly connected to the inner bottom of the partition plate 711 to facilitate the filtration of impurities in the air.

[0039] Furthermore, the positioning sleeve 56 has a groove at the corresponding position of the positioning block 55, and the positioning block 55 is inserted into the groove to facilitate positioning of the filter plate 54.

[0040] In actual operation, when the device is in use, the noise generated by the disordered airflow at the air outlet and air inlet during the operation of its axial flow fan 6 is effectively absorbed by the sound-absorbing perforated plates 3 and sound-absorbing cotton 4 in the silencer 2 set on both sides. At the same time, the vibration and noise generated by the operation of the axial flow fan 6 are absorbed and mitigated by the noise reduction support mechanism 7. The axial flow fan 6 moves along the slider 714 and slide rail 713, causing the upper and lower springs 717 to contract or extend, which in turn causes the damper 715 and rubber support block 721 to move, causing the upper and lower springs 717 to contract or extend. The damper 715 and rubber support block 721 absorb and mitigate these vibrations, preventing them from being directly transmitted to the fan itself and the surrounding structure. Furthermore, the filter mechanism 5 filters the intake air by the filter plate 54 during the operation of the axial flow fan 6, further preventing dust from adhering to the axial flow fan 6. This allows the device to filter solid impurities in the air and prevent floating dust from adhering to the internal sound-absorbing cotton 4 and affecting the noise reduction effect.

[0041] 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.

Claims

1. A silencer for an axial fan, comprising a silencer body (1), characterised in that: The sound-absorbing box body (1) is fixedly connected with sound-absorbing cylinders (2) on the left and right sides, sound-absorbing hole plates (3) are fixedly connected to the inner walls of the sound-absorbing cylinders (2), sound-absorbing cotton (4) is fixedly connected between the sound-absorbing hole plates (3) and the sound-absorbing cylinders (2), filter mechanisms (5) are arranged on the inner walls of the sound-absorbing hole plates (3), and noise reduction supporting mechanisms (7) are arranged inside the sound-absorbing box body (1). The noise reduction supporting mechanism (7) comprises a noise reduction assembly (71) and a supporting assembly (72), and the supporting assembly (72) is arranged outside the noise reduction assembly (71). The noise reduction assembly (71) comprises a partition plate (711) fixedly connected to the inner wall of the sound-absorbing box body (1), sound-absorbing cotton (712) fixedly connected between the partition plate (711) and the sound-absorbing box body (1), sliding grooves (713) fixedly connected to the inner sides of the front and back of the partition plate (711), sliding blocks (714) slidingly connected to the inner sides of the sliding grooves (713), dampers (715) rotatably connected to the inner wall of the partition plate (711), fixed blocks (716) rotatably connected to the output ends of the dampers (715), and springs (717) fixedly connected to the inner sides of the top and bottom of the partition plate (711).

2. The silencer for an axial fan according to claim 1, wherein: Grooves are formed in the corresponding positions of the sliding grooves (713) and the sliding blocks (714), and the sliding blocks (714) are slidingly connected in the grooves.

3. The silencer for an axial fan according to claim 1, wherein: Holes are formed in the corresponding positions of the partition plate (711) and the dampers (715), and the dampers (715) are rotatably connected in the holes.

4. The silencer for an axial fan according to claim 1, wherein: The supporting assembly (72) comprises rubber supporting blocks (721) fixedly connected to the inner side of the bottom of the partition plate (711), supporting cylinders (722) fixedly connected to the top of the rubber supporting blocks (721), clamping frames (723) fixedly connected to the inner wall of the supporting cylinders (722), and supporting frames (724) fixedly connected to the inner wall of the supporting cylinders (722).

5. A silencer for an axial fan as claimed in claim 4, characterized in that: The fixed blocks (716) are fixedly connected to the top and bottom of the supporting cylinders (722), the sliding blocks (714) are fixedly connected to the left and right sides of the supporting cylinders (722), and the axial flow fans (6) are fixedly connected to the outside of the supporting frames (724).

6. The silencer for an axial fan according to claim 1, wherein: The filter mechanism (5) comprises a fixed sleeve (51) fixedly connected to the inner side of the top of the sound-absorbing hole plate (3), a clamping block (52) inserted into the inner side of the fixed sleeve (51), bolts (53) threadedly connected between the clamping block (52) and the fixed sleeve (51), a filter plate (54) fixedly connected to the bottom of the clamping block (52), a positioning block (55) fixedly connected to the bottom of the filter plate (54), and a positioning sleeve (56) fixedly connected to the inner side of the bottom of the partition plate (711).

7. An axial fan silencer according to claim 6, wherein: Grooves are formed in the corresponding positions of the positioning sleeve (56) and the positioning block (55), and the positioning block (55) is inserted into the groove.

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