CN222026007U - A noise reduction mechanism for a centrifugal fan - Google Patents
A noise reduction mechanism for a centrifugal fan Download PDFInfo
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- CN222026007U CN222026007U CN202421100726.8U CN202421100726U CN222026007U CN 222026007 U CN222026007 U CN 222026007U CN 202421100726 U CN202421100726 U CN 202421100726U CN 222026007 U CN222026007 U CN 222026007U
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- impeller
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- air outlet
- noise reduction
- fan
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- 230000009467 reduction Effects 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 title claims abstract description 16
- 229920000742 Cotton Polymers 0.000 claims abstract description 18
- 241000886569 Cyprogenia stegaria Species 0.000 claims description 26
- 230000030279 gene silencing Effects 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本实用新型公开了一种离心式通风机降噪机构，包括具有出风口的风机壳和安装于风机壳内的叶轮，所述叶轮四周的风机壳内壁上设有与叶轮配合的消音结构；所述消音结构包括若干个在风机壳内壁倾斜设置的导风板，所述导风板之间设有消音棉；所述导风板的倾斜方向与叶轮的转动方向相同，本实用新型克服了现有技术的不足，离心通风机内壁上的通风机构能够吸收叶轮转动过程中产生的噪音，大幅降低噪音污染。
The utility model discloses a centrifugal fan noise reduction mechanism, comprising a fan casing with an air outlet and an impeller installed in the fan casing, wherein a noise reduction structure cooperating with the impeller is arranged on the inner wall of the fan casing around the impeller; the noise reduction structure comprises a plurality of air guide plates obliquely arranged on the inner wall of the fan casing, and noise reduction cotton is arranged between the air guide plates; the inclination direction of the air guide plates is the same as the rotation direction of the impeller. The utility model overcomes the shortcomings of the prior art, and the ventilation mechanism on the inner wall of the centrifugal fan can absorb the noise generated during the rotation of the impeller, thereby greatly reducing noise pollution.
Description
Technical Field
The utility model relates to the technical field of noise reduction mechanisms, and in particular belongs to a noise reduction mechanism of a centrifugal ventilator.
Background
The centrifugal fan belongs to one of impeller machines, is widely applied to various fields of energy sources, environment, aviation and the like, and is one of main energy consumption equipment in industrial and agricultural production. The centrifugal ventilator forms negative pressure in the blower by means of rotation of the impeller, and sucks in external air and discharges the external air out of the blower through the impeller flow channel and the volute. And the centrifugal fan impeller can generate larger noise in the rotating process of the centrifugal fan impeller, and has larger influence on staff around the use environment.
Disclosure of utility model
The utility model aims to provide a noise reduction mechanism of a centrifugal ventilator, which overcomes the defects of the prior art and effectively reduces noise.
In order to solve the problems, the technical scheme adopted by the utility model is as follows:
The noise reduction mechanism of the centrifugal ventilator comprises a fan shell with an air outlet and an impeller arranged in the fan shell, wherein a noise reduction structure matched with the impeller is arranged on the inner wall of the fan shell around the impeller;
The silencing structure comprises a plurality of air deflectors obliquely arranged on the inner wall of the fan shell, and silencing cotton is arranged between the air deflectors; the inclination direction of the air deflector is the same as the rotation direction of the impeller.
Further, the distance between the tail end of the air deflector and the impeller from the lower end of the air outlet to the upper end of the air outlet along the rotation direction of the impeller becomes larger gradually.
Further, the silencing cotton between the air deflectors arranged on the fan shell between the lower end of the air outlet in the rotation direction of the impeller and the top of the impeller is not contacted with the fan shell, and the silencing cotton is positioned at the lower part of the air deflectors.
Further, an air outlet pipe is further arranged on the air outlet, and a plurality of outwards inclined conical air outlet frames are arranged on the inner wall of the air outlet pipe; the inner diameter of the conical air outlet frame is smaller than the inner diameter of the air outlet pipe.
Furthermore, noise reduction cotton is arranged between the air outlet frames.
Further, the fan shell of the lower end of the air outlet along the rotation direction of the impeller is also provided with an inverted triangle-shaped air guide block, the upper end face of the air guide block and the lower end of the air outlet are positioned on the same horizontal plane, and the distance between the air guide block and the impeller is smaller than the distance between the air guide plate and the impeller.
Compared with the prior art, the utility model has the following implementation effects:
1. the ventilation mechanism on the inner wall of the centrifugal ventilator can absorb noise generated in the rotation process of the impeller, so that noise pollution is greatly reduced;
2. According to the centrifugal ventilator, the distance between the air deflector and the impeller is changed, so that air sucked into the ventilator shell by the impeller can be continuously compressed forwards and conveyed to the air outlet, compressed air can be stored between the air deflectors which are obliquely arranged, the oblique direction of the air deflector is the same as the rotation direction of the impeller, and high-pressure air flow can be released to the rotation direction of the impeller when the air quantity sucked by the impeller is reduced, so that the stability of air outlet of the centrifugal ventilator is maintained;
3. the interior toper air-out frame and the amortization cotton of being equipped with of play tuber pipe that this centrifugal fan set up, the region between the toper air-out frame of mutually supporting stores and absorbs the noise, noise when reducing the air-out of play tuber pipe, and toper air-out frame internal diameter is less than the air-out tuber pipe internal diameter, and the space grow when making the air current flow out the air-out pipe, has further reduced the noise of air current.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a left side view of the present utility model;
FIG. 3 is a schematic view of the structure of the present utility model;
Fig. 4 is an enlarged view at a in fig. 3.
1. A fan housing; 2. an air outlet pipe; 3. an impeller; 31. a fan blade; 32. a rotating shaft; 4. an air deflector; 5. silencing cotton; 6. and (5) an air outlet frame.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific direction to construct and operate in a specific direction, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-4, the noise reduction mechanism of the centrifugal ventilator of the utility model comprises a fan shell 1 with an air outlet and an impeller 3 arranged in the fan shell 1, wherein the impeller 3 is arranged on the fan shell 1 through a rotating shaft 32, the rotating shaft 32 is driven to rotate by an external power device, a fan blade 31 is arranged on the impeller 3, and when the impeller 3 rotates, the fan blade 31 sucks air into the fan shell 1 and flows out from the air outlet on the fan shell 1.
The inner wall of the fan shell 1 around the impeller 3 is provided with a silencing structure matched with the impeller 3, the silencing structure comprises a plurality of air deflectors 4 obliquely arranged on the inner wall of the fan shell 1, and silencing cotton 5 is arranged between the air deflectors 4; the fan shell 1 at the lower end of the air outlet along the rotation direction of the impeller 3 is also provided with an inverted triangle-shaped air guide block, the upper end surface of the air guide block and the lower end of the air outlet are positioned on the same horizontal plane, and the distance between the air guide block and the impeller 3 is smaller than the distance between the air deflector 4 and the impeller 3. The inclination direction of the air deflector 4 is the same as the rotation direction of the impeller 3; the distance between the tail end of the air deflector 4 and the impeller 3 between the lower end of the air outlet and the upper end of the air outlet along the rotation direction of the impeller 3 gradually becomes larger, the structure ensures that the air sucked into the fan shell 1 by the impeller 3 can be continuously compressed forward and conveyed to the air outlet, compressed air can be stored between the air deflectors 4 which are obliquely arranged, the inclination direction of the air deflector 4 is the same as the rotation direction of the impeller 3, and high-pressure air flow can be released to the rotation direction of the impeller 3 when the air suction amount of the impeller 3 is reduced, so that the stability of the air outlet of the centrifugal fan is maintained. And the noise reduction cotton 5 between the air guide plates 4 arranged on the fan shell 1 between the lower end of the air outlet in the rotation direction of the impeller 3 and the top of the impeller 3 is not in contact with the fan shell 1, and the noise reduction cotton 5 is positioned at the lower part of the air guide plates 4, so that the noise generated during rotation of the impeller 3 can be firstly absorbed by the noise absorption cotton between the air guide plates 4, and the noise passing through the noise absorption cotton can be reflected back to the noise reduction cotton 5 to be absorbed again by the inner wall of the fan shell 1, thereby effectively reducing noise pollution.
In addition, an air outlet pipe 2 is also arranged on the air outlet of the air blower shell 1, and a plurality of outwards inclined conical air outlet frames 6 are arranged on the inner wall of the air outlet pipe 2; the internal diameter of toper air-out frame 6 is less than the internal diameter of air-out pipe 2, be equipped with amortization cotton 5 between the air-out frame 6, when the air current that flows from the air outlet passes through air-out frame 6, the wind direction is corrected, flow forward, and the noise that the wind direction correction in-process produced can be absorbed by amortization cotton 5 between the air-out frame 6, and the internal diameter of air-out frame 6 is less than the internal diameter of air-out pipe 2, make the space grow that the air current after flowing through air-out frame 6 flows through, the air current velocity of flow descends, the air-out wind noise obtains the reduction again.
Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a mechanism of making an uproar falls in centrifugal fan which characterized in that: the fan comprises a fan shell with an air outlet and an impeller arranged in the fan shell, wherein the inner wall of the fan shell around the impeller is provided with a silencing structure matched with the impeller;
The silencing structure comprises a plurality of air deflectors obliquely arranged on the inner wall of the fan shell, and silencing cotton is arranged between the air deflectors; the inclination direction of the air deflector is the same as the rotation direction of the impeller.
2. A centrifugal fan noise reduction mechanism according to claim 1, wherein: the distance between the tail end of the air deflector and the impeller from the lower end of the air outlet to the upper end of the air outlet along the rotation direction of the impeller becomes larger gradually.
3. A centrifugal fan noise reduction mechanism according to claim 1, wherein: the silencing cotton between the air deflectors arranged on the fan shell between the lower end of the air outlet in the rotation direction of the impeller and the top of the impeller is not contacted with the fan shell, and is positioned at the lower part of the air deflectors.
4. A centrifugal fan noise reduction mechanism according to claim 1, wherein: an air outlet pipe is further arranged on the air outlet, and a plurality of outwards inclined conical air outlet frames are arranged on the inner wall of the air outlet pipe; the inner diameter of the conical air outlet frame is smaller than the inner diameter of the air outlet pipe.
5. The noise reduction mechanism of a centrifugal fan according to claim 4, wherein: and silencing cotton is arranged between the air outlet frames.
6. A centrifugal fan noise reduction mechanism according to claim 1, wherein: the fan shell of the lower end of the air outlet along the rotation direction of the impeller is also provided with an inverted triangle-shaped air guide block, the upper end face of the air guide block and the lower end of the air outlet are positioned on the same horizontal plane, and the distance between the air guide block and the impeller is smaller than the distance between the air guide plate and the impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421100726.8U CN222026007U (en) | 2024-05-20 | 2024-05-20 | A noise reduction mechanism for a centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421100726.8U CN222026007U (en) | 2024-05-20 | 2024-05-20 | A noise reduction mechanism for a centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222026007U true CN222026007U (en) | 2024-11-19 |
Family
ID=93434172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421100726.8U Active CN222026007U (en) | 2024-05-20 | 2024-05-20 | A noise reduction mechanism for a centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222026007U (en) |
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2024
- 2024-05-20 CN CN202421100726.8U patent/CN222026007U/en active Active
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