Cotton-added noise reduction structure for centrifugal fan volute

Abstract

The utility model relates to the technical field of sound attenuation and noise reduction, in particular to a centrifugal fan volute cotton-added sound attenuation structure which comprises a surrounding plate, a mesh plate, sound attenuation cotton, two side plates and an air collection assembly, an air outlet is formed between the two side plates, and the thickness of the sound attenuation cotton is 20 mm. When external air fluid enters from the air collecting assembly and then flows out from the air outlet, and meanwhile, when the fluid passes through the inner cavity of the device, noise generated when the fluid makes contact with and rubs against the mesh plate and the silencing cotton can be attracted by the silencing cotton, and the mesh plate and the surrounding plate are connected in a full-length welding mode, so that metal friction sound generated during vibration can be avoided, and the noise reduction effect is achieved. Therefore, through cooperation of the mesh plate and the coaming, the problem that a conventional volute is only provided with one coaming, and consequently the overall rigidity is weak is solved, the overall rigidity is improved, and through cooperation of the silencing cotton, noise is prevented from being generated when gas flows.

Description

Technical Field

[0001] The utility model relates to the technical field of silencing and noise reduction, in particular to a centrifugal fan volute with cotton silencing structure. Background Art

[0002] The ventilation system silencing and noise reduction technology usually uses a silencer box (or silencer pipe) at the front end of the fan outlet to eliminate some of the noise from the airflow at the outlet.

[0003] The noise generated by the sound of the airflow and the friction between the airflow and the inner wall of the volute casing in the core flow field of the fan has not been reduced. At present, the rapid flow of gas will cause the original single enclosure of the volute to vibrate, thereby generating noise. Utility Model Content

[0004] The purpose of the utility model is to provide a centrifugal fan volute with cotton silencer structure, which solves the problem that the noise generated by the sound of the airflow and the friction between the airflow and the inner wall of the volute in the core flow field of the fan in the prior art is not reduced, and the rapid flow of gas will cause the original single enclosure of the volute to vibrate, thereby generating noise.

[0005] To achieve the above-mentioned purpose, the utility model provides a centrifugal fan volute cotton-added silencer structure, comprising a surrounding plate, a mesh plate, silencer cotton, two side plates and an air collecting assembly, an air outlet is arranged between the two side plates, the mesh plate is welded to the two side plates and is located above the two side plates, the two side plates are relatively parallel, the surrounding plate is welded to the two side plates and is located above the mesh plate, the silencer cotton is arranged between the mesh plate and the surrounding plate, and the silencer cotton has a thickness of 20 mm.

[0006] Wherein, the centrifugal fan volute with cotton and silencer structure also includes a volute tongue, which is welded to the two side plates and is located between the two side plates.

[0007] Wherein, the wind collecting component includes a wind collector and a circular frame, the circular frame has a plurality of mounting holes, the circular frame is arranged on the side plate on the right side, and the wind collector is fixedly connected to the circular frame.

[0008] Among them, the centrifugal fan volute cotton-added silencer structure also includes a filter plate, two slots and two blocks, the two slots are respectively fixedly connected to the circular frame, the two blocks are respectively fixedly connected to the filter plate, and the two blocks are respectively snap-fitted with the corresponding slots.

[0009] Wherein, the centrifugal fan volute with cotton silencer structure also includes two friction pads, and the two friction pads are respectively fixedly connected to the side surfaces of the corresponding clamping blocks.

[0010] The utility model provides a centrifugal fan volute with cotton-added silencer structure. When external air fluid enters from the wind collecting component and then flows out from the air outlet, while the fluid passes through the inner cavity of the device, the fluid contacts the mesh plate and the silencer cotton, and the noise generated by friction will be attracted by the silencer cotton. The mesh plate and the enclosure are connected by full welding, so as to avoid the sound of metal friction during vibration. Therefore, the cooperation of the mesh plate and the enclosure solves the problem that the conventional volute has only one enclosure, resulting in weak overall rigidity, thereby improving the overall rigidity. Moreover, the cooperation of the silencer cotton can avoid noise during gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0012] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0013] Figure 2 It is an overall cross-sectional view of the first embodiment of the utility model.

[0014] Figure 3 The utility model Figure 2 A magnified view of the local structure at A.

[0015] Figure 4 It is an overall structural diagram of the second embodiment of the utility model.

[0016] Figure 5 The utility model Figure 4 Enlarged view of the local structure at point B.

[0017] 101-enclosure, 102-mesh plate, 103-silencer cotton, 104-side plate, 105-snail tongue, 106-air collector, 107-ring frame, 108-air outlet, 109-mounting hole, 201-filter plate, 202-slot, 203-block, 204-friction pad. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] First embodiment:

[0020] See also Figures 1 to 3 ,in, Figure 1It is a schematic diagram of the overall structure of the first embodiment of the utility model. Figure 2 is a sectional view of the whole of the first embodiment of the utility model, Figure 3 The utility model Figure 2 A magnified view of the local structure at A.

[0021] The utility model provides a centrifugal fan volute with cotton-added silencer structure, comprising a surrounding plate 101, a mesh plate 102, silencer cotton 103, two side plates 104, an air collecting component and a volute tongue 105, wherein the air collecting component comprises an air collector 106 and a circular ring frame 107, an air outlet 108 is arranged between the two side plates 104, and the circular ring frame 107 has a plurality of mounting holes 109.

[0022] With respect to this specific embodiment, when external air fluid enters from the wind collecting component and then flows out from the air outlet 108, while the fluid passes through the inner cavity of the device, the fluid contacts the mesh plate 102 and the sound-absorbing cotton 103, and the noise generated by friction will be attracted by the sound-absorbing cotton 103, and the mesh plate 102 and the enclosure 101 are connected by full welding, so as to avoid the sound of metal friction during vibration. Therefore, through the cooperation of the mesh plate 102 and the enclosure 101, the problem that the conventional volute has only one enclosure 101, resulting in weak overall rigidity, is solved, and the overall rigidity is improved. Through the cooperation of the sound-absorbing cotton 103, noise is avoided during gas flow. When the air fluid enters the inner cavity, the fluid can be smoothly discharged from the air outlet 108 through the guidance of the volute tongue 105. External air fluid enters the inner cavity of the device through the air collector 106 , and the air collector 106 fixes the circular frame 107 on the side plate 104 by passing a plurality of fixing bolts through the mounting holes 109 , thereby fixing the air collector 106 .

[0023] Among them, an air outlet 108 is arranged between the two side panels 104, the mesh plate 102 is welded to the two side panels 104 and is located above the two side panels 104, the two side panels 104 are relatively parallel, the enclosure 101 is welded to the two side panels 104 and is located above the mesh plate 102, the sound-absorbing cotton 103 is arranged between the mesh plate 102 and the enclosure 101, and the thickness of the sound-absorbing cotton 103 is 20 mm. When external air fluid enters from the wind collecting component and then flows out from the air outlet 108, while the fluid passes through the inner cavity of the device, the fluid contacts the mesh plate 102 and the sound-absorbing cotton 103, and the noise generated by friction will be attracted by the sound-absorbing cotton 103, and the mesh plate 102 and the enclosure 101 are connected by full welding, so as to avoid the sound of metal friction during vibration. Therefore, the cooperation between the mesh plate 102 and the enclosure 101 solves the problem that the conventional volute has only one enclosure 101, resulting in weak overall rigidity, thereby improving the overall rigidity, and the cooperation of the sound-absorbing cotton 103 can avoid noise during gas flow.

[0024] Secondly, the volute tongue 105 is welded to the two side plates 104 and is located between the two side plates 104. When the air fluid enters the inner cavity, the fluid can be smoothly discharged from the air outlet 108 through the guidance of the volute tongue 105.

[0025] Meanwhile, the circular frame 107 has a plurality of mounting holes 109, the circular frame 107 is arranged on the right side plate 104, and the air collector 106 is fixedly connected to the circular frame 107. External air fluid enters the inner cavity of the device through the air collector 106, and the air collector 106 fixes the circular frame 107 on the side plate 104 by passing a plurality of fixing bolts through the mounting holes 109, thereby fixing the air collector 106.

[0026] When using the centrifugal fan volute with cotton silencer structure of the utility model, when external air fluid enters from the wind collecting component and then flows out from the air outlet 108, when the fluid passes through the inner cavity of the device, the fluid contacts the mesh plate 102 and the silencer cotton 103, and the noise generated by friction will be attracted by the silencer cotton 103, and the mesh plate 102 and the enclosure 101 are connected by full welding, so as to avoid the sound of metal friction during vibration. Therefore, the cooperation of the mesh plate 102 and the enclosure 101 solves the problem that the conventional volute has only one enclosure 101, resulting in weak overall rigidity, and improves the overall rigidity. In addition, the cooperation of the silencer cotton 103 avoids noise during gas flow. When the air fluid enters the inner cavity, the fluid can be smoothly discharged from the air outlet 108 through the guidance of the volute tongue 105. External air fluid enters the inner cavity of the device through the air collector 106 , and the air collector 106 fixes the circular frame 107 on the side plate 104 by passing a plurality of fixing bolts through the mounting holes 109 , thereby fixing the air collector 106 .

[0027] Second embodiment:

[0028] Based on the first embodiment, please refer to Figure 4 and Figure 5 ,in, Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the utility model. Figure 5 The utility model Figure 4 Enlarged view of the local structure at point B.

[0029] The utility model provides a centrifugal fan volute with cotton added silencer structure, which also includes a filter plate 201, two slots 202, two blocks 203 and two friction pads 204.

[0030] With respect to this specific embodiment, when the fluid passes through the air collector 106, the dust and impurities on the fluid will adhere to the air collector 106, and will clog the air collector 106 after a long time. However, the air collector 106 is troublesome to disassemble and is not convenient for quick cleaning. At this time, the filter plate 201 is set on the outside of the air collector 106 through the cooperation of the two slots 202 and the two blocks 203, so as to filter the dust and impurities in the fluid. When the filter plate 201 needs to be replaced and cleaned, it is only necessary to pull the filter plate 201 outward to disengage the two blocks 203 from the corresponding slots 202. The operation is simple and quick. The friction force is improved by the setting of the two friction pads 204, so that the two blocks 203 can be more firmly engaged in the corresponding slots 202.

[0031] The two slots 202 are respectively fixedly connected to the annular frame 107, the two blocks 203 are respectively fixedly connected to the filter plate 201, and the two blocks 203 are respectively snap-fitted with the corresponding slots 202. When the fluid passes through the wind collector 106, the dust and impurities on the fluid will adhere to the wind collector 106, and will block the wind collector 106 after a long time. However, the wind collector 106 is troublesome to disassemble and is not convenient for quick cleaning. At this time, the filter plate 201 is arranged outside the wind collector 106 through the cooperation of the two slots 202 and the two blocks 203, so as to filter the dust and impurities in the fluid. When the filter plate 201 needs to be replaced and cleaned, it is only necessary to pull the filter plate 201 outward to disengage the two blocks 203 from the corresponding slots 202, and the operation is simple and quick.

[0032] Secondly, the two friction pads 204 are respectively fixedly connected to the side surfaces of the corresponding clamping blocks 203. The arrangement of the two friction pads 204 increases the friction force, so that the two clamping blocks 203 can be more firmly clamped in the corresponding clamping slots 202.

[0033] When using the centrifugal fan volute with cotton silencer structure of the present invention, when the fluid passes through the air collector 106, the dust and impurities on the fluid will adhere to the air collector 106, and will clog the air collector 106 after a long time. However, the air collector 106 is troublesome to disassemble and is not convenient for quick cleaning. At this time, the filter plate 201 is arranged on the outside of the air collector 106 through the cooperation of the two slots 202 and the two blocks 203, so as to filter the dust and impurities in the fluid. When the filter plate 201 needs to be replaced and cleaned, it is only necessary to pull the filter plate 201 outward to disengage the two blocks 203 from the corresponding slots 202. The operation is simple and quick. The friction force is increased by the arrangement of the two friction pads 204, so that the two blocks 203 can be more firmly engaged in the corresponding slots 202.

[0034] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A centrifugal fan volute with cotton silencing structure, characterized in that: It includes a surrounding plate, a mesh plate, sound-absorbing cotton, two side plates and an air collecting component. An air outlet is arranged between the two side plates. The mesh plate is welded to the two side plates and is located above the two side plates. The two side plates are relatively parallel. The surrounding plate is welded to the two side plates and is located above the mesh plate. The sound-absorbing cotton is arranged between the mesh plate and the surrounding plate, and the thickness of the sound-absorbing cotton is 20 mm.

2. The centrifugal fan volute with cotton silencing structure according to claim 1, characterized in that: The centrifugal fan volute with cotton and silencer structure also includes a volute tongue, which is welded to the two side plates and is located between the two side plates.

3. The centrifugal fan volute with cotton-added silencer structure according to claim 2, characterized in that: The wind collecting component includes a wind collector and a circular frame. The circular frame has a plurality of mounting holes. The circular frame is arranged on the side plate on the right side. The wind collector is fixedly connected to the circular frame.

4. The centrifugal fan volute with cotton-added silencer structure according to claim 3, characterized in that: The centrifugal fan volute cotton-added silencer structure also includes a filter plate, two slots and two blocks. The two slots are fixedly connected to the annular frame respectively, the two blocks are fixedly connected to the filter plate respectively, and the two blocks are respectively snap-fitted with the corresponding slots.

5. The centrifugal fan volute with cotton-added silencer structure according to claim 4, characterized in that: The centrifugal fan volute with cotton and silencer structure also includes two friction pads, and the two friction pads are respectively fixedly connected to the side surfaces of the corresponding clamping blocks.

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