CN216554605U - Silencing volute and centrifugal fan thereof - Google Patents
Silencing volute and centrifugal fan thereof Download PDFInfo
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- CN216554605U CN216554605U CN202123073657.5U CN202123073657U CN216554605U CN 216554605 U CN216554605 U CN 216554605U CN 202123073657 U CN202123073657 U CN 202123073657U CN 216554605 U CN216554605 U CN 216554605U
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Abstract
The utility model provides a silencing volute and a centrifugal fan thereof, comprising: a body provided with an impeller accommodating chamber; the body includes: the impeller comprises a front plate, a middle plate and a rear plate, wherein the front plate and the rear plate are respectively arranged on two end walls of the middle plate, and the front plate, the middle plate and the rear plate are enclosed to form an impeller accommodating cavity; the body further includes: at least one circumferential guide plate which is of an arc structure and is arranged around the inner side wall of the middle plate, each circumferential guide plate is arranged in a multi-layer mode in the axial direction, and a set distance B is reserved between the circumferential guide plates of adjacent layers; the air outlet guide plate is arranged at the air outlet of the body, two ends of the air outlet guide plate are respectively connected with the front plate and the rear plate, and the impeller accommodates the air in the cavity and transmits the air to the air outlet through the air outlet guide plate. The utility model can reduce the noise of the volute when in work.
Description
Technical Field
The utility model relates to the technical field of volutes, in particular to a silencing volute and a centrifugal fan thereof.
Background
The volute is used as an important component of a centrifugal fan system and plays an important role in the performance of the whole centrifugal fan system. The molded line of the volute in the existing centrifugal fan (such as the range hood with the application number of CN 201610716200.6) is continuously changed according to the flow in the rotation direction of the airflow, the sectional area of the flow channel is changed accordingly, and the airflow is uniformly guided to the air outlet along the circumferential direction of the impeller. The gas enters the volute and the impeller along the axial inlet, and because of the size limitation of the multi-wing fan, the gas flow cannot uniformly enter the volute in the process of rotating from the axial direction to the circumferential direction, so that the gas flow cannot uniformly enter a volute flow channel when being thrown out from an air outlet of the impeller, and a certain speed difference is generated in the axial direction of the gas flow. In addition, the airflow in the volute channel flows along the circumferential direction, partial airflow is separated from circumferential airflow and tangential airflow at the air outlet, the cross section area of the air outlet is enlarged due to the requirement of pressure conversion, and eddy currents are easily generated at the air outlet. The uneven axial airflow and the eddy generated at the air outlet affect the performance of the whole machine and the noise.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a silencing volute and a centrifugal fan thereof, which can guide airflow in the volute and avoid vortex at an air outlet.
To this end, a muffling volute is provided, comprising:
a body provided with an impeller accommodating chamber;
the body includes: the impeller comprises a front plate, a middle plate and a rear plate, wherein the front plate and the rear plate are respectively arranged on two end walls of the middle plate, and the front plate, the middle plate and the rear plate are enclosed to form an impeller accommodating cavity;
the body further includes:
at least one circumferential guide plate which is of an arc structure and is arranged around the inner side wall of the middle plate, each circumferential guide plate is arranged in a multi-layer mode in the axial direction, and a set distance B is reserved between the circumferential guide plates of adjacent layers;
the air outlet guide plate is arranged at the air outlet of the body, two ends of the air outlet guide plate are respectively connected with the front plate and the rear plate, and the impeller accommodates the air in the cavity and transmits the air to the air outlet through the air outlet guide plate.
Furthermore, the inner arc end face of each circumferential guide plate faces the impeller accommodating cavity, and the outer arc end face of each circumferential guide plate is fixedly connected with the inner side wall of the middle plate.
Further, in any piece of circumferential guide plate, the distance between the inner arc end face and the outer arc end face of the circumferential guide plate is gradually increased towards the direction of the air outlet.
Further, the number of circumferential baffles of each stage in the axial direction towards the front plate or the rear plate increases in sequence.
Further, the circumferential guide plates in each level are arranged at equal intervals.
Furthermore, the circumferential guide plates in each level are arranged at equal intervals to the side walls of the middle plates corresponding to the level.
Furthermore, the plane where the air outlet guide plate is located is perpendicular to the plane where the circumferential guide plate is located.
Further, the air outlet guide plate is provided with two to towards keeping away from the direction that the impeller held the chamber arranges in proper order, is close to the length that the air outlet guide plate in impeller held the chamber will be less than keeps away from the length of the air outlet guide plate in impeller held the chamber.
A centrifugal fan, comprising:
the impeller is connected with an external power supply to take electricity;
the silencer volute is characterized by further comprising the silencing volute, and the impeller is embedded into the impeller accommodating cavity.
Further, the distance between the inner arc end face of each circumferential guide plate and the outer diameter of the impeller is not less than a set distance A, and the set distance A is greater than zero.
Has the advantages that:
according to the hardware structure of the silencing volute, the circumferential guide plates of multiple layers are arranged on the inner wall of the middle plate, the distance between the circumferential guide plates of adjacent layers is the set distance B, so that circumferential airflow in the body enters gaps between the circumferential guide plates of all layers, and the circumferential guide plates of all layers weaken mutual influence between axial airflow and axial airflow. In addition, an air outlet guide plate is also arranged at the air outlet of the body, so that the circumferential airflow passing through the air outlet is output to the outside of the air outlet along the air outlet guide plate, and the mutual infection of the tangential airflow and the circumferential airflow at the air outlet is avoided to generate vortex.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic view of the construction of a muffling volute of the present invention;
FIG. 2 is a schematic view of another angle configuration of the muffling volute of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;
fig. 5 is a partially exploded view of the present invention.
Description of reference numerals: 1-body; 1.1-front panel; 1.2-rear panel; 1.3-middle plate; 2-an impeller; 3-circumferential flow guide plate; 3.1-first stage baffles; 3.2-second stage baffles; 3.3-third stage baffles; 4-air outlet guide plate; 4.1-a first air outlet deflector; 4.2-air outlet second guide plate.
Detailed Description
The utility model is further described with reference to the following examples.
Referring to fig. 1, the voice coil casing in the present embodiment includes: a body 1 provided with an impeller housing chamber; the body 1 comprises: the impeller comprises a front plate 1.1, a middle plate 1.3 and a rear plate 1.2, wherein the front plate 1.1 and the rear plate 1.2 are respectively arranged on two end walls of the middle plate 1.3, and the front plate 1.1, the middle plate 1.3 and the rear plate 1.2 are enclosed to form an impeller accommodating cavity; the body 1 further comprises: at least one circumferential guide plate 3 which is of an arc structure and is arranged around the inner side wall of the middle plate 1.3, each circumferential guide plate 3 is arranged in a multi-layer mode in the axial direction, and a set distance B is reserved between the circumferential guide plates 3 of adjacent layers; the air outlet guide plate 4 of at least one slice, it sets up the air outlet department and both ends of body 1 are connected respectively the front bezel 1.1 reaches the back plate 1.2, the impeller holds the wind warp in the chamber the air outlet guide plate 4 court the transmission of air outlet. Through being equipped with the circumference guide plate 3 of multistage on the inner wall of medium plate 1.3, the distance between the circumference guide plate 3 of adjacent hierarchy is for setting for distance B for the clearance between the circumference guide plate 3 of each hierarchy is got into to circumference air current in the body 1, and the circumference guide plate 3 of each hierarchy has weakened the influence each other between axial air current and the axial air current. In addition, an air outlet guide plate 4 is also arranged at the air outlet of the body 1, so that the circumferential airflow passing through the air outlet is output to the outside of the air outlet along the air outlet guide plate 4, and the mutual infection of the tangential airflow and the circumferential airflow at the air outlet is avoided to generate vortex.
Furthermore, the inner arc end face of each circumferential guide plate 3 faces the impeller accommodating cavity, and the outer arc end face of each circumferential guide plate is fixedly connected with the inner side wall of the middle plate 1.3.
Further, in any one circumferential guide plate 3, the distance between the inner arc end surface and the outer arc end surface gradually increases toward the direction of the air outlet.
Further, the number of circumferential baffles 3 of each stage in the axial direction towards the front plate 1.1 or the rear plate 1.2 increases in sequence.
Further, the circumferential baffles 3 in each level are equally spaced.
Further, the circumferential guide plates 3 in each level are arranged at equal intervals to the side walls of the middle plates 1.3 corresponding to the level.
Further, the plane where the air outlet guide plate 4 is located is perpendicular to the plane where the circumferential guide plate 3 is located.
Further, the air outlet guide plate 4 is provided with two to towards keeping away from the direction that the impeller held the chamber arranges in proper order, is close to the length that the air outlet guide plate 4 in the impeller held the chamber will be less than keeps away from the length of the air outlet guide plate 4 in the impeller held the chamber.
A centrifugal fan, comprising:
the impeller is connected with an external power supply to take electricity;
the silencer volute is characterized by further comprising the silencing volute, and the impeller is embedded into the impeller accommodating cavity.
Further, the distance between the inner arc end face of each circumferential guide plate 3 and the outer diameter of the impeller is not less than a set distance a, and the set distance a is greater than zero.
Each circumferential guide plate 3 is respectively arranged in parallel with the front plate 1.1 and the rear plate 1.2.
Furthermore, each circumferential guide plate is arranged in multiple layers in the axial direction, and a set distance B is reserved between the circumferential guide plates of adjacent layers.
Each circumferential guide plate is arranged in parallel with the front plate 1.1/the rear plate 1.2.
Referring to fig. 2 to 5, in this embodiment, a circumferential guide plate 3 is disposed on a middle plate 1.3, and is divided into three stages, which are a first stage guide plate 3.1, a second stage guide plate 3.2, a third stage guide plate 3.3, and the first stage guide plate 3.1 is a piece disposed in the middle of the middle plate 1.3 along the rotation direction of the impeller 2. The second-stage guide plate 3.2 is two pieces of equal-distance axial arrangement on the inner wall of the middle plate 1.3. The third-stage guide plates 3.3 are three and are arranged on the inner wall of the middle plate 1.3 at equal intervals along the axial direction. Each guide plate uses the center of the impeller 2 as an original point, the left and right directions are transverse axes, the up and down directions are longitudinal axes to define four quadrants for distribution, and the guide plates start from a first quadrant and end at an air outlet of a second quadrant of the shell 1 along the rotation direction of the impeller 2. The distance between the top of the guide plate and the outer diameter of the impeller 2 is A, A is more than 0, and A is preferably 15 mm. Each stage of guide plates has a circumferential distance of B, and the guide plates can have a certain distance or mutually staggered and preferably have a distance of 0 mm. The circumferential guide plate 3 is fixed on the middle plate 1.3 and can be riveted, welded and the like, and the number of the guide plate sections ranges from 2 sections to 5 sections, and 3 sections are preferred. In this embodiment, an air outlet guide plate 4 is also arranged at the air outlet, which is respectively a first air outlet guide plate 4.1 and a second air outlet guide plate 4.2, and the air outlet guide plate equally divides the air outlet 3 (the distance from the air outlet section to two line segments which are parallel to the air outlet section and tangent to the volute tongue). The first guide plate of the air outlet section is parallel to the air outlet section, the bottom end of the first guide plate is in certain distance or contact with the third-stage guide plate 3.3, and the top end of the first guide plate is connected with the air outlet of the shell 1. The second guide plate is parallel to the first guide plate, the bottom end of the second guide plate is aligned with the horizontal tangent of the volute tongue, the top end of the second guide plate is connected to the air outlet of the shell 1 and is respectively contacted with the front plate 1.1 and the rear plate 1.2 in the front-back direction, and the installation mode can be riveting or welding and the like.
According to the flowing characteristics of airflow in a volute flow channel, a three-stage guide plate is arranged at the middle plate 1.3. Due to the structural characteristics of the multi-wing fan, the airflow at the air outlet of the impeller 2 is not uniform along the axial direction, and the speed difference exists. In addition, the velocity of the air flow also varies in the circumferential direction, and these factors affect the stability of the air flow in the axial direction. According to the embodiment, according to the increase of the flow at each section of the shell 1, the middle plate 1.3 is circumferentially provided with the multi-stage guide plates, so that the guide effect is achieved in the circumferential direction, and meanwhile, the axial disturbance of the airflow is restrained in the axial direction, so that the airflow is more uniform. At the air outlet, the airflow is separated from tangential airflow and circumferential airflow, meanwhile, at the air outlet, partial pressure conversion of the air needs to be completed, and the change of pressure and speed easily causes backflow vortex of the airflow at the volute tongue or in the middle of the air outlet of the shell 1, so that the performance of the fan is influenced. This embodiment is through setting up two guide plates in air outlet department, and the guide air current progressively gets into the air outlet passageway from the outside, reduces the influence of each other between the air current. In order to avoid the air flow at the air outlet from impacting the guide plate, the bottom of the second guide plate 4.2 at the air outlet is designed to be higher than the volute tongue, and the length of the second guide plate 4.2 at the air outlet is smaller than that of the first guide plate 4.1 at the air outlet.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A muffling volute, comprising:
a body provided with an impeller accommodating chamber;
the body includes: the impeller comprises a front plate, a middle plate and a rear plate, wherein the front plate and the rear plate are respectively arranged on two end walls of the middle plate, and the front plate, the middle plate and the rear plate are enclosed to form an impeller accommodating cavity;
characterized in that, the body still includes:
at least one circumferential guide plate which is of an arc structure and is arranged around the inner side wall of the middle plate, each circumferential guide plate is arranged in a multi-layer mode in the axial direction, and a set distance B is reserved between the circumferential guide plates of adjacent layers;
the air outlet guide plate is arranged at the air outlet of the body, two ends of the air outlet guide plate are respectively connected with the front plate and the rear plate, and the impeller accommodates the air in the cavity and transmits the air to the air outlet through the air outlet guide plate.
2. The muffling volute of claim 1, wherein the inner arc end surface of each circumferential flow guiding plate faces the impeller accommodating chamber, and the outer arc end surface of each circumferential flow guiding plate is fixedly connected to the inner side wall of the middle plate.
3. The muffling volute of claim 2, wherein in any one of the circumferential baffles, the distance between the inner arc end surface and the outer arc end surface gradually increases toward the outlet.
4. The acoustic volute of claim 1, wherein the number of circumferential baffles in each level in the axial direction toward the front plate or the back plate increases sequentially.
5. The acoustic volute of claim 4, wherein the circumferential baffles in each level are equally spaced.
6. The muffling volute of claim 5, wherein the circumferential baffles in each level are equally spaced to fill the sidewall of the middle plate corresponding to the level.
7. The acoustic volute of claim 1, wherein the plane of the air outlet deflector is perpendicular to the plane of the circumferential deflector.
8. The muffling volute of claim 7, wherein the air outlet flow guiding plate has two pieces, and the two pieces are sequentially arranged in a direction away from the impeller accommodating cavity, and the length of the air outlet flow guiding plate close to the impeller accommodating cavity is smaller than the length of the air outlet flow guiding plate away from the impeller accommodating cavity.
9. A centrifugal fan, comprising:
the impeller is connected with an external power supply to take electricity;
characterized in that it also comprises a silencing volute according to any one of claims 1 to 8, the impeller being embedded in the impeller housing chamber.
10. The centrifugal fan of claim 9, wherein: the distance between the inner arc end face of each circumferential guide plate and the outer diameter of the impeller is not less than a set distance A, and the set distance A is greater than zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123073657.5U CN216554605U (en) | 2021-12-07 | 2021-12-07 | Silencing volute and centrifugal fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123073657.5U CN216554605U (en) | 2021-12-07 | 2021-12-07 | Silencing volute and centrifugal fan thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216554605U true CN216554605U (en) | 2022-05-17 |
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ID=81540125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123073657.5U Active CN216554605U (en) | 2021-12-07 | 2021-12-07 | Silencing volute and centrifugal fan thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216554605U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788957A (en) * | 2022-11-29 | 2023-03-14 | 广东顺威精密塑料股份有限公司 | Volute with vortex generator and multi-wing centrifugal fan using volute |
-
2021
- 2021-12-07 CN CN202123073657.5U patent/CN216554605U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788957A (en) * | 2022-11-29 | 2023-03-14 | 广东顺威精密塑料股份有限公司 | Volute with vortex generator and multi-wing centrifugal fan using volute |
| CN115788957B (en) * | 2022-11-29 | 2023-05-30 | 广东顺威精密塑料股份有限公司 | Volute with vortex generator and multi-wing centrifugal fan using same |
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