CN219509874U

CN219509874U - Noise-reducing centrifugal wind wheel and centrifugal fan using same

Info

Publication number: CN219509874U
Application number: CN202320238474.4U
Authority: CN
Inventors: 梁炜亮; 叶涛; 覃万翔; 韦宏茂
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-08-11
Anticipated expiration: 2033-02-17

Abstract

The utility model discloses a noise reduction centrifugal wind wheel and a centrifugal fan using the same, wherein the centrifugal wind wheel comprises an air inlet guide ring, blades and a chassis, wherein at least one blade is arranged on the blades, the blades are connected between the air inlet guide ring and the chassis, and the blades are uniformly distributed around the axial line of the chassis in the circumferential direction; the outer side end of the blade comprises a first edge and a second edge which are connected from top to bottom, the shape of the first edge is a straight line, the shape of the second edge is an arc, and the bottom end of the second edge faces to the axis of the chassis. The noise reduction centrifugal wind wheel and the centrifugal fan using the same provided by the scheme reduce the possibility of secondary vortex generation, thereby achieving the purposes of reducing noise and improving the aerodynamic performance of the centrifugal wind wheel, and are simple and reasonable in structure, reliable in performance and low in cost, and are beneficial to overcoming the defects in the prior art.

Description

Noise-reducing centrifugal wind wheel and centrifugal fan using same

Technical Field

The utility model relates to the technical field of centrifugal wind wheels, in particular to a noise-reducing centrifugal wind wheel and a centrifugal fan using the same.

Background

Centrifugal fans are machines that increase the pressure of a gas by mechanical energy and then transport the gas out. The centrifugal fan in the prior art generally comprises a volute and a centrifugal wind wheel, and the operation principle is as follows: the centrifugal wind wheel is driven by the motor to rotate in the volute, does work on gas in the volute, changes the flow direction of the gas through the volute and increases the pressure of the gas, so that a pressure difference is formed between an air inlet and an air outlet of the volute, and the circulation of the gas is ensured.

In the prior art, the tail edges of blades inside the centrifugal wind wheel are generally linear plate-shaped blades, so that when the centrifugal wind wheel rotates, the inside moving airflow is easy to flow and separate under the action of fluid viscous force, reverse pressure gradient and rotating coriolis force, secondary vortex is formed, the working efficiency of the centrifugal wind wheel is low, and the pneumatic performance and working noise of the centrifugal fan are influenced.

Disclosure of Invention

The utility model aims to provide a noise-reducing centrifugal wind wheel and a centrifugal fan using the same, which reduce the possibility of secondary vortex generation, thereby achieving the purposes of reducing noise and improving the aerodynamic performance of the centrifugal wind wheel.

To achieve the purpose, the utility model adopts the following technical scheme:

the noise-reducing centrifugal wind wheel comprises an air inlet guide ring, blades and a chassis, wherein at least one blade is arranged on the blades, the blades are connected between the air inlet guide ring and the chassis, and the blades are uniformly distributed around the axial line of the chassis in the circumferential direction;

the outer side end of the blade comprises a first edge and a second edge which are connected from top to bottom, the shape of the first edge is a straight line, the shape of the second edge is an arc, and the bottom end of the second edge faces to the axis of the chassis.

Preferably, the first edge and the second edge are smoothly transited.

Preferably, the height of the outer end of the blade is H, the length of the first edge is H, and

preferably, the height of the outer end of the blade is H, the radius of the circumference of the second edge is R, and

preferably, the shape of the outer edge of the air inlet guide ring is a straight line, and the outer edge of the air inlet guide ring and the first edge are positioned on the same vertical line.

Preferably, the shape of the outer edge of the chassis is an arc, and the second edge smoothly transitions with the outer edge of the chassis.

Preferably, the height of the outer end of the blade is H, the radius of the circumference of the outer edge of the chassis is r, and

preferably, the radius of the circumference of the second edge is the same as the radius of the circumference of the outer edge of the chassis.

A centrifugal fan uses the noise-reducing centrifugal wind wheel.

The technical scheme provided by the embodiment of the utility model can have the following beneficial effects:

the outside tip of blade is including being the first edge of linear type and being the second edge of pitch arc type for the air current that gets into centrifugal wind wheel can be followed the lower part of blade and arranged to centrifugal wind wheel's outside fast, thereby has reduced the possibility that secondary vortex produced, thereby reaches the purpose that reduces the noise and improve centrifugal wind wheel aerodynamic performance, and simple structure is reasonable, dependable performance, with low costs.

Drawings

Fig. 1 is a schematic structural view of a noise reduction centrifugal wind wheel of the present utility model.

Fig. 2 is a side view of a noise reducing centrifugal wind wheel of the present utility model.

Fig. 3 is a partial structural cross-sectional view of a noise reduction centrifugal wind wheel of the present utility model.

Wherein: the air intake guide ring 1, the blades 2, the first edge 21, the second edge 22 and the chassis 3.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The technical scheme provides a noise reduction centrifugal wind wheel, which comprises an air inlet guide ring 1, blades 2 and a chassis 3, wherein at least one blade is arranged on each blade 2, the blades 2 are connected between the air inlet guide ring 1 and the chassis 3, and the blades 2 are uniformly distributed around the axial line of the chassis 3 in the circumferential direction;

the outer end of the blade 2 comprises a first edge 21 and a second edge 22 connected from top to bottom, the first edge 21 being rectilinear in shape, the second edge 22 being arc in shape, and the bottom end of the second edge 22 being directed towards the axis of the chassis 3.

In order to solve the above technical problems, the present technical solution provides a noise reduction centrifugal wind wheel, as shown in fig. 1-3, including an air intake guide ring 1, a chassis 3, and blades 2 evenly distributed around the axial circumference of the chassis 3 between the air intake guide ring 1 and the chassis 3. Specifically, the outer side end portion (i.e., the blade tail edge) of the blade 2 includes a first edge 21 in a linear shape and a second edge 22 in an arc shape, so that a low-energy airflow cluster formed by the airflow entering the centrifugal wind wheel can be quickly discharged to the outside of the centrifugal wind wheel from the lower portion of the blade 2, the possibility of secondary vortex generation is reduced, the purposes of reducing noise and improving the aerodynamic performance of the centrifugal wind wheel are achieved, and the centrifugal wind wheel has the advantages of simple and reasonable structure, reliable performance and low cost.

Further, the first edge 21 and the second edge 22 are smoothly transitioned.

In one embodiment of the present disclosure, the first edge 21 and the second edge 22 are smoothly transitioned, which is advantageous for further avoiding the branching of the airflow entering the centrifugal wind wheel.

Further described, the outer end of the blade 2 has a height H, the first edge 21 has a length H, and

in a preferred embodiment of the present solution, as shown in fig. 3, the ratio between the length of the first edge 21 and the height of the outer end of the blade 2 is preferably 0.4-0.7, which is advantageous to ensure that the low energy air mass exiting the centrifugal wind wheel is concentrated in the lower part of the trailing edge of the blade 22 on the one hand, so as to effectively ensure that the air mass is discharged as soon as possible, and on the other hand, since the air flow located in the upper part of the trailing edge of the blade 22 is a normal flowing air flow, the above-mentioned preference can avoid influencing the flow of the normal air flow.

Further described, the height of the outer end of the blade 2 is H, theThe second edge 22 is located at a radius R

In another preferred embodiment of the present solution, as shown in fig. 3, the ratio between the radius of the circumference of the second edge 22 and the height of the outer end of the blade 2 is preferably 0.6-1.5, i.e. the radius of the circumference of the second edge 22 is preferably chosen, which is advantageous for further ensuring a fast discharge of the low energy air mass located in the lower part of the trailing edge of the blade 22 from the centrifugal wind wheel.

Further, the outer edge of the air intake guide ring 1 is in a straight line, and the outer edge of the air intake guide ring 1 and the first edge 21 are located on the same vertical line.

Further, the shape of the outer edge of the chassis 3 is an arc, and the second edge 22 smoothly transitions with the outer edge of the chassis 3.

In a more preferred embodiment of the technical scheme, the action effect of the linear edge is prolonged to the outer side edge of the air inlet guide ring 1, and meanwhile, the action effect of the arc type is prolonged to the outer side edge of the chassis 3, so that the corresponding action of the outer side end shape of the blade 2 on the air flow is increased.

Further described, the height of the outer end of the blade is H, the radius of the circumference of the outer edge of the chassis 3 is r, and

further, the radius of the circumference of the second edge 22 is the same as the radius of the circumference of the outer edge of the chassis 3.

In another preferred embodiment of the present technical solution, the second edge 22 and the outer edge of the chassis 3 are continuously curved with the same center of circle, so as to further ensure smooth discharge of the low-energy airflow clusters, thereby achieving the purposes of reducing noise and improving aerodynamic performance of the centrifugal wind wheel.

A centrifugal fan uses the noise-reducing centrifugal wind wheel.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims

1. The utility model provides a centrifugal wind wheel of making an uproar falls which characterized in that: the wind inlet guide ring, the blades and the chassis are at least provided with one blade, the blades are connected between the wind inlet guide ring and the chassis, and the blades are uniformly distributed around the axial line of the chassis in the circumferential direction;

2. A noise reducing centrifugal wind wheel according to claim 1, wherein: the first edge and the second edge smoothly transition.

3. A noise reducing centrifugal wind wheel according to claim 1, wherein: the height of the outer end of the blade is H, the length of the first edge is H, and

4. a noise reducing centrifugal wind wheel according to claim 1, wherein: the height of the outer end part of the blade is H, the circumference radius of the second edge is R, and

5. a noise reducing centrifugal wind wheel according to claim 1, wherein: the shape of the outer side edge of the air inlet guide ring is a straight line, and the outer side edge of the air inlet guide ring and the first edge are positioned on the same vertical line.

6. A noise reducing centrifugal wind wheel according to claim 1, wherein: the shape of the outer side edge of the chassis is an arc, and the second edge smoothly transitions with the outer side edge of the chassis.

7. The noise-reducing centrifugal wind wheel according to claim 6, wherein: the height of the outer end part of the blade is H, the circumference radius of the outer edge of the chassis is r, and

8. a noise reducing centrifugal wind wheel according to claim 7, wherein: the radius of the circumference of the second edge is the same as the radius of the circumference of the outer edge of the chassis.

9. A centrifugal fan, characterized in that: use of a noise reducing centrifugal wind wheel according to any one of claims 1-8.