Stainless steel silencing static pressure box for integrated fan

Abstract

The stainless steel noise elimination static pressure box comprises a main fan and auxiliary fans located on the two sides of the main fan, an air inlet cover is arranged outside the main fan and the auxiliary fans in a sleeved mode, a shell is arranged on the rear side of the air inlet cover, the two sides of the inner wall of the shell are fixedly connected with the two auxiliary fans respectively, and the inner bottom of the shell is in sliding connection with the main fan. A main flow guide plate is arranged at the position, corresponding to the main fan, of the rear side in the shell, an auxiliary flow guide plate is arranged at the position, corresponding to the auxiliary fan, of the rear side in the shell, the main flow guide plate is fixedly connected with the rear side of the main fan, push plates used for pushing the auxiliary flow guide plate to rotate are arranged on the two sides of the main flow guide plate, and an air outlet is formed in the top of the rear side of the shell. The air inlet amount is adjusted by adjusting the position of the main fan, meanwhile, the main flow guide plate and the auxiliary flow guide plate can be synchronously and correspondingly adjusted, noise reduction in different use scenes is achieved, functionality is high, practicability is high, and application and popularization are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of fan noise reduction technology, specifically to an integrated stainless steel noise reduction static pressure box for fans. Background Technology

[0002] A plenum chamber is an essential component in air supply systems, used to reduce dynamic pressure, increase static pressure, stabilize airflow, and reduce airflow vibration, thus improving air supply performance. A plenum chamber is a device that allows airflow while effectively preventing or reducing the outward propagation of sound energy.

[0003] A fan is a gas compression and conveying machine that converts rotational mechanical energy into gas pressure energy and kinetic energy, and then transports the gas outwards. Fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling, as well as for ventilation and induced draft in boilers and industrial furnaces. In some specific locations, there are requirements for quiet operation of the fan; therefore, the fan needs to be used in conjunction with a silencer plenum chamber. Currently, silencer plenum chambers and fans are usually installed separately, not as a single unit, which can lead to problems such as incompatibility or poor noise reduction.

[0004] For example, utility model patent CN219301000U discloses a silencing static pressure box, including a main body; the main body is provided with an air inlet and an air outlet, and an airflow cavity communicating with the air inlet and the air outlet is formed inside; the main body comprises, from the inside to the outside, a composite pinhole aluminum sound-absorbing plate, a porous composite sound-absorbing material, and a galvanized steel plate. Although its sound-absorbing structure composed of a composite pinhole aluminum sound-absorbing plate and a porous composite sound-absorbing material has a better sound absorption and noise reduction effect than the traditional single sound-absorbing material sound-absorbing structure, its actual performance for different types of fans still needs to be verified. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an integrated stainless steel silencer static pressure box for fans.

[0006] The technical solution of this utility model is:

[0007] An integrated stainless steel silencer plenum box for fans includes a main fan, auxiliary fans located on both sides of the main fan, an air inlet hood covering the main fan and the auxiliary fans, a housing behind the air inlet hood, two auxiliary fans fixedly connected to the inner walls of the housing on both sides, a sliding connection between the bottom of the housing and the main fan, a main guide plate corresponding to the position of the main fan on the rear side of the housing, and a secondary guide plate corresponding to the position of the auxiliary fans on the rear side of the housing, the main guide plate being fixedly connected to the rear side of the main fan, push plates for pushing the secondary guide plates to rotate on both sides of the main guide plate, and an air outlet on the top of the rear side of the housing.

[0008] Furthermore, a drive motor is provided at the center of the top of the housing, and a push rod is provided at the output end of the drive motor. A slot is provided on the top of the housing corresponding to the extension direction of the push rod, and the push rod is fixedly connected to the top of the main fan through a fixing rod passing through the slot.

[0009] Explanation: The main fan is moved by a drive motor, thereby adjusting the position of the main fan and controlling the air intake volume.

[0010] Furthermore, when the push rod extends to its maximum length, the main fan is located in front of the auxiliary fan; when the push rod extends to its minimum length, the main fan and the auxiliary fan are flush.

[0011] Note: When the main fan is located outside the auxiliary fan, the air intake is moderate, and further noise reduction can be optimized. When the main fan and auxiliary fan are level, the air intake is large, and noise reduction needs to be reasonably controlled.

[0012] Furthermore, the main flow plate is fixedly connected to the rear side of the main fan via a connecting rod, and the slider at the bottom of the main fan is slidably connected to the groove at the center of the bottom of the housing.

[0013] Note: The main fan is kept stable during movement by using sliders and chutes.

[0014] Furthermore, a spring shaft is provided at the bottom of the left front end of the sub-guide plate located on the left side, and a spring shaft is provided at the bottom of the right front end of the sub-guide plate located on the right side. The spring shaft is rotatably connected to the bottom of the housing.

[0015] Note: The spring shaft design allows the secondary guide plate to automatically reset after being pushed and rotated.

[0016] Furthermore, each of the upper sides of the main flow plate is provided with a flow guide extension plate, which extends to the middle position of the corresponding two secondary flow guide plates. The front sides of the main flow plate, the flow guide extension plate, and the secondary flow guide plates are all arc-shaped.

[0017] Note: The curved guide surface can effectively reduce wind noise, and by extending the guide plate, the secondary guide plate can maintain a high overall noise reduction effect during rotation.

[0018] Furthermore, the maximum rotation angle of the secondary guide vane is 30° to 40°.

[0019] Note: Limiting the maximum rotation angle of the secondary guide vane prevents a decrease in noise reduction effect due to excessive rotation.

[0020] Furthermore, the rotation radius of the main fan blades is 1.5 to 2 times that of the auxiliary fan blades.

[0021] Note: By limiting the ratio of fan blades between the main fan and the auxiliary fan, a reasonable air intake is ensured, resulting in better noise reduction and sound attenuation.

[0022] The beneficial effects of this utility model are:

[0023] (1) The integrated stainless steel silent static pressure box for fans of this utility model integrates three sets of fans of different specifications with the outer shell to form an integrated structure, further reducing the noise brought by the air intake. The air intake volume can be adjusted by adjusting the position of the main fan. At the same time, the main guide plate and the secondary guide plate can be adjusted synchronously, realizing noise reduction in different usage scenarios. It has strong functionality and high practicality, which is conducive to its widespread use.

[0024] (2) The various guide plates mounted on the integrated stainless steel silencing static pressure box for the fan of this utility model cooperate with each other to form a continuous airflow, noise reduction and sound absorption duct. For different working modes, when the main fan extends forward, the airflow is uniform, the air volume is moderate and the noise is low. When the main fan and the auxiliary fan are aligned, the air force of the main fan is increased, and the noise can be kept low by adjusting the position of each guide plate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an integrated stainless steel silencer static pressure box for fans according to this utility model;

[0026] Figure 2 This is a front view of an integrated stainless steel silencer static pressure box for fans according to this utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of an integrated stainless steel silencer static pressure box for fans, omitting the rear of the shell.

[0028] Figure 4 This utility model provides an integrated stainless steel silencer static pressure box for fans, but the internal structure of the shell is omitted.

[0029] Figure 5 This is a rear view of an integrated stainless steel silencer static pressure box for fans according to this utility model.

[0030] Among them, 1-main fan, 11-slider, 2-auxiliary fan, 3-air inlet hood, 4-shell, 41-air outlet, 42-slot, 43-slide groove, 5-main flow plate, 51-push plate, 52-connecting rod, 53-flow guide extension plate, 6-auxiliary flow guide plate, 61-spring shaft, 7-drive motor, 71-push rod, 72-fixed rod. Detailed Implementation

[0031] Example 1

[0032] like Figure 1and Figure 2 As shown, an integrated stainless steel silencer static pressure box for fans includes a main fan 1 and auxiliary fans 2 located on both sides of the main fan 1. The rotation radius of the blades of the main fan 1 is 1.8 times that of the blades of the auxiliary fans 2. An air inlet hood 3 is provided on the outside of the main fan 1 and the auxiliary fans 2. A housing 4 is provided on the rear side of the air inlet hood 3. The inner walls of the housing 4 are fixedly connected to the two auxiliary fans 2 on both sides respectively. The bottom of the housing 4 is slidably connected to the main fan 1. A main guide plate 5 is provided on the rear side of the housing 4 corresponding to the position of the main fan 1. A secondary guide plate 6 is provided on the rear side of the housing 4 corresponding to the position of the auxiliary fans 2. The main guide plate 5 is fixedly connected to the rear side of the main fan 1. Push plates 51 for pushing the secondary guide plate 6 to rotate are provided on both sides of the main guide plate 5. An air outlet 41 is provided on the top rear side of the housing 4.

[0033] like Figure 2 and Figure 3 As shown, a drive motor 7 is provided at the center of the top of the housing 4, and a push rod 71 is provided at the output end of the drive motor 7. The drive motor 7 and the push rod 71 are commercially available electro-hydraulic push rods. A slot 42 is provided on the top of the housing 4 corresponding to the extension direction of the push rod 71. The push rod 71 is fixedly connected to the top of the main fan 1 through a fixing rod 72 that passes through the slot 42. When the push rod 71 extends to its maximum length, the main fan 1 is located in front of the auxiliary fan 2. When the push rod 71 extends to its minimum length, the main fan 1 is flush with the auxiliary fan 2.

[0034] like Figure 4 and Figure 5 As shown, the main guide plate 5 is fixedly connected to the rear side of the main fan 1 by a connecting rod 52. The slider 11 at the bottom of the main fan 1 is slidably connected to the sliding groove 43 at the center of the bottom of the housing 4. The left front end bottom of the auxiliary guide plate 6 on the left side is provided with a spring shaft 61, and the right front end bottom of the auxiliary guide plate 6 on the right side is provided with a spring shaft 61. The spring shaft 61 is rotatably connected to the bottom of the housing 4. There is a guide extension plate 53 on each side of the upper part of the main guide plate 5. The guide extension plate 53 extends to the middle position of the corresponding two auxiliary guide plates 6. The front sides of the main guide plate 5, the guide extension plate 53, and the auxiliary guide plate 6 are all arc-shaped. The maximum rotation angle of the auxiliary guide plate 6 is 35°. The main guide plate 5, the guide extension plate 53, and the auxiliary guide plate 6 are all commercially available porous moisture-proof calcium silicate sound-absorbing boards.

[0035] Example 2

[0036] The difference between this embodiment and Embodiment 1 is that:

[0037] The rotation radius of the main fan 1 blade is 1.5 times that of the auxiliary fan 2 blade, and the maximum rotation angle of the auxiliary guide vane 6 is 30°.

[0038] Example 3

[0039] The difference between this embodiment and Embodiment 1 is that:

[0040] The rotation radius of the main fan 1 blade is twice that of the auxiliary fan 2 blade, and the maximum rotation angle of the auxiliary guide vane 6 is 40°.

[0041] Working principle:

[0042] The working principle of the integrated stainless steel silencer static pressure box for fans of this utility model is briefly explained below.

[0043] When in use, the main fan 1 is located in front of the auxiliary fan 2 when in the initial position. At this time, the air intake is kept moderate and the air is guided in parallel by each guide plate to achieve noise reduction.

[0044] When it is necessary to further increase the air intake, the drive motor 7 is turned on, which drives the push rod 71 to move backward. The push rod 71 drives the fixed rod 72 to move backward, thereby driving the main fan 1 to move backward. The slider 11 slides in the slide groove 43 to prevent the main fan 1 from being misaligned when it moves. At the same time, the push plate 51 contacts the auxiliary guide plate 6. If it continues to move, it will push the auxiliary guide plate 6 to rotate, so that the auxiliary guide plate 6 rotates around the spring shaft 61 as the center until the main fan 1 is kept flush with the two auxiliary fans 2. At this time, after the two auxiliary guide plates 6 rotate, they form a wrap around the main guide plate 5. At the same time, the two guide extension plates 53 are kept in the gap between the main guide plate 5 and the auxiliary guide plate 6, forming a surround state, which improves the noise reduction and sound attenuation effect of the air coming from behind the main fan 1.

[0045] Even with increased air intake, good noise reduction and silencing effects can still be maintained.

Claims

1. An integrated stainless steel silencer static pressure box for fans, characterized in that, Includes a main fan (1), auxiliary fans (2) located on both sides of the main fan (1), an air inlet hood (3) is fitted around the main fan (1) and the auxiliary fans (2), a housing (4) is provided on the rear side of the air inlet hood (3), the inner walls of the housing (4) are fixedly connected to the two auxiliary fans (2) respectively, the bottom of the housing (4) is slidably connected to the main fan (1), a main flow plate (5) is provided on the rear side of the housing (4) corresponding to the position of the main fan (1), a secondary flow plate (6) is provided on the rear side of the housing (4) corresponding to the position of the auxiliary fans (2), the main flow plate (5) is fixedly connected to the rear side of the main fan (1), push plates (51) are provided on both sides of the main flow plate (5) for pushing the secondary flow plate (6) to rotate, and an air outlet (41) is provided on the top of the rear side of the housing (4).

2. The integrated stainless steel silencer static pressure box for fans according to claim 1, characterized in that, A drive motor (7) is provided at the top center of the housing (4). A push rod (71) is provided at the output end of the drive motor (7). A slot (42) is provided at the top of the housing (4) corresponding to the extension direction of the push rod (71). The push rod (71) is fixedly connected to the top of the main fan (1) through a fixing rod (72) that passes through the slot (42).

3. The integrated stainless steel silencer static pressure box for fans according to claim 2, characterized in that, When the push rod (71) extends to its maximum length, the main fan (1) is located in front of the auxiliary fan (2). When the push rod (71) extends to its minimum length, the main fan (1) and the auxiliary fan (2) are flush.

4. The integrated stainless steel silencer static pressure box for fans according to claim 1, characterized in that, The main flow plate (5) is fixedly connected to the rear side of the main fan (1) by a connecting rod (52), and the slider (11) provided at the bottom of the main fan (1) is slidably connected to the sliding groove (43) provided at the center of the bottom of the housing (4).

5. The integrated stainless steel silencer static pressure box for fans according to claim 1, characterized in that, The sub-guide plate (6) located on the left side has a spring shaft (61) at the bottom of its left front end, and the sub-guide plate (6) located on the right side has a spring shaft (61) at the bottom of its right front end. The spring shaft (61) is rotatably connected to the bottom of the housing (4).

6. The integrated stainless steel silencer static pressure box for fans according to claim 1, characterized in that, Each of the upper sides of the main flow plate (5) is provided with a flow extension plate (53), which extends to the middle position of the corresponding two secondary flow plates (6). The front sides of the main flow plate (5), the flow extension plate (53), and the secondary flow plates (6) are all arc-shaped.

7. The integrated stainless steel silencer static pressure box for fans according to claim 1, characterized in that, The maximum rotation angle of the secondary guide vane (6) is 30° to 40°.

8. The integrated stainless steel silencer static pressure box for fans according to claim 1, characterized in that, The rotation radius of the blades of the main fan (1) is 1.5 to 2 times that of the rotation radius of the blades of the auxiliary fan (2).

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