A noise reduction device for an axial flow fan

Abstract

The utility model relates to fan noise reduction technical field, concretely relates to a kind of axial fan noise reduction device, including connecting seat and structural assembly, structural assembly includes installation pole, connecting sleeve, noise reduction cylinder, sound-absorbing board, limiting component, flow guide, shell and connecting component, installation pole is fixedly connected with connecting seat, and located in the side of connecting seat, connecting sleeve is sleeved in the outside of connecting seat, and is slidably connected with connecting seat, noise reduction cylinder is fixedly connected with connecting sleeve, and located in the side of connecting sleeve, sound-absorbing board is connected with noise reduction cylinder by limiting component, limiting component is installed on noise reduction cylinder, and sound-absorbing board is positioned, flow guide is fixedly connected with noise reduction cylinder, and located in noise reduction cylinder, shell is sleeved in the outside of noise reduction cylinder, and is detachably connected with connecting seat, connecting component connects noise reduction cylinder and shell, solve the prior art although can reduce fan noise, but, device maintenance is inconvenient, dust is easy to accumulate after long-term operation, affect the problem of noise reduction effect.

Description

Technical Field

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

[0002] Axial flow fans are a commonly used type of fan. They are characterized by high airflow and high air velocity. When a large volume of air flows out of the fan casing at high speed, it often collides and rubs against the outlet structure of the casing, generating noise. In environments requiring high airflow and low noise, traditional axial flow fans cannot effectively reduce noise.

[0003] The prior art CN216975352U discloses an axial flow fan noise reduction device, including a chassis and a fan blade rotatably disposed inside the chassis. One end of the fan blade is provided with a motor that drives the fan blade to rotate. The device also includes a noise reduction housing disposed at the air outlet of the chassis. Inside the noise reduction housing, a plurality of noise reduction discs are arranged at intervals along the air outlet direction. The noise reduction discs are provided with noise reduction holes, and the noise reduction holes on adjacent noise reduction discs are staggered. Guide grilles are provided between the noise reduction holes on adjacent noise reduction discs. This effectively deflects and buffers the airflow at the fan outlet, thereby effectively reducing the fan noise.

[0004] While existing axial flow fan noise reduction devices can reduce fan noise, they are inconvenient to maintain and dust tends to accumulate after long-term operation, affecting the noise reduction effect. Utility Model Content

[0005] The purpose of this invention is to provide a noise reduction device for axial flow fans, which solves the problem that although the existing technology can reduce fan noise, the device is inconvenient to maintain and dust easily accumulates after long-term operation, affecting the noise reduction effect.

[0006] To achieve the above objectives, this utility model provides a noise reduction device for an axial flow fan, including a connecting seat and a structural assembly. The structural assembly includes a mounting rod, a connecting sleeve, a noise reduction cylinder, a sound-absorbing plate, a limiting component, a flow guide, a housing, and a connecting component. The mounting rod is fixedly connected to the connecting seat and located on one side of the connecting seat. The connecting sleeve is sleeved on the outside of the connecting seat and slidably connected to the connecting seat. The noise reduction cylinder is fixedly connected to the connecting sleeve and located on one side of the connecting sleeve. The sound-absorbing plate is connected to the noise reduction cylinder through the limiting component, which is installed on the noise reduction cylinder and limits the position of the sound-absorbing plate. The flow guide is fixedly connected to the noise reduction cylinder and located inside the noise reduction cylinder. The housing is sleeved on the outside of the noise reduction cylinder and detachably connected to the connecting seat. The connecting component connects the noise reduction cylinder and the housing.

[0007] The limiting component includes a first clamping plate and a second clamping plate. The first clamping plate is fixedly connected to the noise reduction cylinder and is located on the outside of the noise reduction cylinder. The second clamping plate is fixedly connected to the noise reduction cylinder and is located on the side of the noise reduction cylinder closer to the first clamping plate.

[0008] The connecting component includes a connecting plate and a fixing base. The connecting plate is fixedly connected to the noise reduction cylinder and is located at the end of the noise reduction cylinder. The fixing base is fixedly connected to the noise reduction cylinder and is located at the end of the noise reduction cylinder near the connecting plate.

[0009] The structural component also includes a buffer rubber ring, which is sleeved on the outside of the mounting rod and fixedly connected to the mounting rod.

[0010] The structural component also includes a handle, which is disposed on the connecting plate and located on one side of the connecting plate.

[0011] This utility model discloses a noise reduction device for an axial flow fan, comprising a connecting base and structural components. The structural components include a mounting rod, a connecting sleeve, a noise reduction cylinder, a sound-absorbing plate, a limiting component, a flow guide, a housing, and a connecting component. The mounting rod is fixedly connected to the connecting base and located on one side of the connecting base. The connecting sleeve is fitted onto the outside of the connecting base and slidably connected to it. The noise reduction cylinder is fixedly connected to the connecting sleeve and located on one side of it. The sound-absorbing plate is connected to the noise reduction cylinder via the limiting component, which is installed on the noise reduction cylinder and limits the position of the sound-absorbing plate. The flow guide is fixedly connected to the noise reduction cylinder and located inside it. The housing is fitted onto the outside of the noise reduction cylinder and detachably connected to the connecting base. The connecting component connects the noise reduction cylinder and the housing. This invention solves the problem that while existing technologies can reduce fan noise, they are inconvenient to maintain, and dust easily accumulates after long-term operation, affecting the noise reduction effect. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of the axial flow fan noise reduction device of this utility model.

[0014] Figure 2 This is a structural schematic diagram of the sound-absorbing plate and the limiting component of this utility model.

[0015] Figure 3 This is a structural schematic diagram of the connecting component of this utility model.

[0016] In the diagram: 101-Connecting seat, 102-Mounting rod, 103-Connecting sleeve, 104-Noise reduction cylinder, 105-Silence plate, 106-First clamping plate, 107-Second clamping plate, 108-Flow guide, 109-Housing shell, 110-Connecting plate, 111-Fixing seat, 112-Buffer rubber ring, 113-Handle. Detailed Implementation

[0017] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0018] The embodiment of this application is as follows: Please see Figures 1-3 , Figure 1 This is a schematic diagram of the overall structure of the axial flow fan noise reduction device of this utility model. Figure 2 This is a structural schematic diagram of the sound-absorbing plate 105 and the limiting component of this utility model. Figure 3 This is a structural schematic diagram of the connecting component of this utility model.

[0019] This utility model discloses an axial flow fan noise reduction device, comprising a connecting base 101, a mounting rod 102, a connecting sleeve 103, a noise reduction cylinder 104, a sound-absorbing plate 105, a first clamping plate 106, a second clamping plate 107, a flow guide 108, a housing 109, a connecting plate 110, a fixing base 111, a buffer rubber ring 112, and a handle 113. It solves the problem that while existing technologies can reduce fan noise, they suffer from inconvenient maintenance and dust accumulation after long-term operation, affecting the noise reduction effect. It is understood that the aforementioned solution can also be used to improve convenience.

[0020] In this embodiment, the connecting seat 101 has a hollow horn-shaped structure, and the small-diameter end can be connected to the air outlet of the axial flow fan. By setting the structural components on the connecting seat 101, the problem of the prior art being inconvenient to maintain and prone to dust accumulation after long-term operation, thus affecting the noise reduction effect, is solved.

[0021] The mounting rod 102 is fixedly connected to the connecting seat 101 and located on one side of the connecting seat 101. The connecting sleeve 103 is sleeved on the outside of the connecting seat 101 and slidably connected to the connecting seat 101. The noise reduction cylinder 104 is fixedly connected to the connecting sleeve 103 and located on one side of the connecting sleeve 103. The silencing plate 105 is connected to the noise reduction cylinder 104 through the limiting member. The limiting member is installed on the noise reduction cylinder 104 and limits the silencing plate 105. The flow guide 108 is fixedly connected to the noise reduction cylinder 104 and located inside the noise reduction cylinder 104. The housing 109 is sleeved on the outside of the noise reduction cylinder 104 and detachably connected to the connecting seat 101. The connecting component connects the noise-reducing cylinder 104 to the housing 109. Multiple smooth cylinders, each mounted evenly on one side of the large-diameter opening of the connecting seat 101, are mounted on the mounting rods 102. The number of connecting sleeves 103 is the same as the number of mounting rods 102. Multiple connecting sleeves 103 are respectively fitted onto the mounting rods 102 and can slide on them. The noise-reducing cylinder 104 is an open cylinder with several fine holes in the middle. Multiple connecting sleeves 103 are fixedly connected to the outer side of the noise-reducing cylinder 104. The noise-reducing cylinder 104 is connected to the mounting rods 102 via the connecting sleeves 103, providing stable support for the noise-reducing cylinder 104. The sound-absorbing plate 10... 5. Multiple arc-shaped panels made of glass wool are installed on the outside of the noise reduction cylinder 104 via multiple sets of limiting components. These limiting components restrict the sound-absorbing plate 105, allowing it to be installed on the outer periphery of the noise reduction cylinder 104. The flow guide 108 is conical and fixedly installed inside the noise reduction cylinder 104 via a fixing bracket, with the cone tip facing the air outlet of the axial flow fan. Guided by the flow guide 108, the air blown by the axial flow fan diffuses towards the inner wall of the noise reduction cylinder 104, forming a resonant structure under the action of several fine holes. This absorbs specific frequency noise through the Helmholtz resonance effect. Furthermore, the fine holes disperse the airflow, reduce the flow velocity, and decrease aerodynamic noise caused by turbulence and impact. Combined with... The sound-absorbing plate 105 has a porous structure that captures and absorbs sound wave energy, reducing reflected noise and thus achieving noise reduction. The shell 109 is a hollow cylinder with open ends, fitted onto the outside of the noise-reducing cylinder 104. One end is connected to the connecting seat 101 by bolts, and the other end is connected to the noise-reducing cylinder 104 by the connecting member. After removing the bolts, the noise-reducing cylinder 104 can be removed by sliding outwards for later cleaning and maintenance. The pull-out design allows the noise-reducing cylinder 104 and the sound-absorbing plate 105 to be pulled outwards, facilitating later maintenance. This solves the problem that although existing technologies can reduce fan noise, the device is inconvenient to maintain, and dust easily accumulates after long-term operation, affecting the noise reduction effect.

[0022] Secondly, the first clamping plate 106 is fixedly connected to the noise reduction cylinder 104 and is located on the outside of the noise reduction cylinder 104; the second clamping plate 107 is fixedly connected to the noise reduction cylinder 104 and is located on the side of the noise reduction cylinder 104 close to the first clamping plate 106. Both the first clamping plate 106 and the second clamping plate 107 are L-shaped, and there are multiple of them. One first clamping plate 106 and one second clamping plate 107 are arranged opposite to each other. The silencing plate 105 can be installed between the corresponding first clamping plate 106 and the second clamping plate 107. The silencing plate 105 is clamped by the first clamping plate 106 and the second clamping plate 107, thereby realizing the limiting and fixing of the silencing plate 105.

[0023] Meanwhile, the connecting plate 110 is fixedly connected to the noise-reducing cylinder 104 and located at the end of the noise-reducing cylinder 104; the fixing seat 111 is fixedly connected to the noise-reducing cylinder 104 and located at the end of the noise-reducing cylinder 104 near the connecting plate 110. The connecting plate 110 has an L-shaped cross-section and is located at the end of the noise-reducing cylinder 104 away from the connecting seat 101. There are multiple fixing seats 111, which are evenly distributed on the outer periphery of the end of the noise-reducing cylinder 104. The fixing seat 111 has threaded holes, and the housing 109 and the connecting plate 110 can be fixed to the fixing seat 111 by bolts, so that the housing 109, the connecting plate 110 and the noise-reducing cylinder 104 are fixed together. Through the connecting components, the end of the housing 109 and the end of the noise-reducing cylinder 104 are fixedly connected, thereby improving stability.

[0024] In addition, the buffer rubber ring 112 is sleeved on the outside of the mounting rod 102 and fixedly connected to the mounting rod 102. The buffer rubber ring 112 is disposed on multiple mounting rods 102. After the connecting sleeve 103 is installed on the mounting rod 102, the buffer rubber ring 112 is located between the mounting rod 102 and the connecting sleeve 103, which can achieve a flexible buffering effect. Through the buffer rubber ring 112, vibration noise can be avoided after the connecting sleeve 103 is connected to the mounting rod 102.

[0025] Finally, the handle 113 is provided on the connecting plate 110 and located on one side of the connecting plate 110, so that the noise reduction cylinder 104 can be easily pulled out through the handle 113.

[0026] In this embodiment, during use, the device is connected to the outlet of an axial flow fan. Air from the axial flow fan enters the device, and under the action of the guide member 108, the air is guided, causing it to expand outwards and contact the inner wall of the noise reduction cylinder 104. Since the inner wall of the noise reduction cylinder 104 has a porous structure, a resonant structure is formed by the action of several fine pores. Specific frequency noise is absorbed through the Helmholtz resonance effect. Furthermore, the several fine pores can disperse the airflow, reduce the flow velocity, and reduce aerodynamic noise caused by turbulence and impact. Combined with the porous structure of the sound-absorbing plate 105 itself, it captures and absorbs sound wave energy, reducing reflected noise, thereby achieving the purpose of noise reduction. During disassembly and maintenance, remove all bolts on the housing 109, and then pull the noise reduction cylinder 104 outward through the handle 113. The noise reduction cylinder 104 and the sound-absorbing plate 105 can then slide outward to achieve disassembly. After cleaning, the noise reduction cylinder 104 and the sound-absorbing plate 105 can be reinstalled, which greatly improves convenience and solves the problem that although the existing technology can reduce fan noise, the device is inconvenient to maintain and dust easily accumulates after long-term operation, affecting the noise reduction effect.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A noise reduction device for an axial flow fan, comprising a connecting base, characterized in that, It also includes structural components; The structural components include a mounting rod, a connecting sleeve, a noise-reducing cylinder, a sound-absorbing plate, a limiting component, a flow guide, a housing, and a connecting component. The mounting rod is fixedly connected to the connecting seat and located on one side of the connecting seat. The connecting sleeve is sleeved on the outside of the connecting seat and slidably connected to the connecting seat. The noise-reducing cylinder is fixedly connected to the connecting sleeve and located on one side of the connecting sleeve. The sound-absorbing plate is connected to the noise-reducing cylinder through the limiting component, which is installed on the noise-reducing cylinder and limits the position of the sound-absorbing plate. The flow guide is fixedly connected to the noise-reducing cylinder and located inside the noise-reducing cylinder. The housing is sleeved on the outside of the noise-reducing cylinder and detachably connected to the connecting seat. The connecting component connects the noise-reducing cylinder and the housing.

2. The axial flow fan noise reduction device as described in claim 1, characterized in that, The limiting component includes a first clamping plate and a second clamping plate. The first clamping plate is fixedly connected to the noise reduction cylinder and is located on the outside of the noise reduction cylinder. The second clamping plate is fixedly connected to the noise reduction cylinder and is located on the side of the noise reduction cylinder closer to the first clamping plate.

3. The axial flow fan noise reduction device as described in claim 1, characterized in that, The connecting component includes a connecting plate and a fixing base. The connecting plate is fixedly connected to the noise reduction cylinder and is located at the end of the noise reduction cylinder. The fixing base is fixedly connected to the noise reduction cylinder and is located at the end of the noise reduction cylinder near the connecting plate.

4. The axial flow fan noise reduction device as described in claim 1, characterized in that, The structural component also includes a buffer rubber ring, which is sleeved on the outside of the mounting rod and fixedly connected to the mounting rod.

5. The axial flow fan noise reduction device as described in claim 3, characterized in that, The structural component also includes a handle, which is disposed on the connecting plate and located on one side of the connecting plate.

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