CN216381966U

CN216381966U - Axial fan with double-stage blades

Info

Publication number: CN216381966U
Application number: CN202121989816.3U
Authority: CN
Inventors: 叶博森; 余上芳
Original assignee: Guangzhou Longhui Electronic Technology Co ltd
Current assignee: Guangzhou Longhui Electronic Technology Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-04-26
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses a double-order blade axial flow fan which comprises an outer ring, an inner connecting disc and a plurality of connecting sheets, wherein each connecting sheet comprises a first connecting blade and a second connecting blade, the end part of each first connecting blade is connected with the end part of each second connecting blade, each connecting sheet is provided with a bottom plane, a first-order wind inlet angle is formed between each first connecting blade and the bottom plane, a second-order wind inlet angle is formed between each second connecting blade and the bottom plane, and the first-order wind inlet angle is larger than the second-order wind inlet angle. The design of the double-step blade is adopted, the design of different wind angles of the step blade ensures that the same blade has two different wind angles simultaneously when the fan blade runs, the turbulent flow formed by airflow is favorably dispersed, the fan noise is reduced, the lateral ring design of the fan blade ensures the balance stability and strong wind pressure of the fan running, the unbalance amount of the fan blade is greatly reduced, and the deformation and the outward expansion of the blade are avoided when the turbulent flow noise of the fan running is reduced.

Description

Axial fan with double-stage blades

Technical Field

The utility model relates to the field of fans, in particular to an axial flow fan with double-stage fan blades.

Background

At present, in the electronic industry, the heat generated by electronic components during working is immeasurable, and particularly, an electronic chip grasps the running condition of the whole electronic system; the heat energy can cause serious damage to the components themselves, and can also accelerate the aging of peripheral devices, thereby reducing the service life of the peripheral devices. The heat sink is produced, and the fan is used as a commonly used active heat dissipation element in the heat dissipation system and is not limited in the heat sink; and it plays a vital role in the whole heat-dissipating course; therefore, the performance of the fan is directly related to the heat-clearing performance of the radiator.

However, the existing heat sinks in the electronics industry have the following disadvantages:

in a heat radiation fan in a traditional heat radiator, fan blades play a very important role as main material parts in the fan, and the inlet and outlet directions of air flow are parallel to the axial direction of the fan blades; the blade structure of the existing axial flow fan is mostly a one-order sickle blade, and the common blade is a blade surface blade structure with the same air inlet angle and air outlet angle; in the design of the blade shape of the fan blade, the key problem of design is to enhance the balance of the fan blade in order to achieve larger air volume and air pressure; although the air volume performance advantage is improved, the air pressure under the same noise is difficult to be improved, the turbulent flow noise of the fan during operation is reduced, and the blades are not deformed and are outwards expanded during operation, which is an important problem.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide an axial fan with dual-stage blades, which can solve the problems of blade deformation and outward expansion.

One of the purposes of the utility model is realized by adopting the following technical scheme:

a double-order blade axial flow fan comprises an outer ring, an inner connecting disc and a plurality of connecting sheets, wherein each connecting sheet comprises a first connecting blade and a second connecting blade, the end part of each first connecting blade is connected with the end part of each second connecting blade, each connecting sheet is provided with a bottom plane, a first-order wind inlet angle is formed between each first connecting blade and the bottom plane, a second-order wind inlet angle is formed between each second connecting blade and the bottom plane, and the first-order wind inlet angle is larger than the second-order wind inlet angle; the inner end of the second connecting blade is fixedly connected with the inner side connecting disc, the outer sheet of the first connecting blade is fixedly connected with the outer side circular ring, and the connecting sheets are uniformly distributed between the outer side circular ring and the inner side connecting disc.

Further, the first connecting blade has a width larger than that of the second connecting blade.

Furthermore, the end surfaces of the first connecting blade and the second connecting blade are both arc-shaped.

Further, the first connecting blade includes a thick blade portion, and a thin blade portion joined to the thick blade portion.

Further, the inner connecting disc is disc-shaped, and the circle center of the inner connecting disc coincides with the circle center of the outer ring.

Compared with the prior art, the utility model has the beneficial effects that:

a first-order wind inlet angle is formed between the first connecting blade and the bottom plane, a second-order wind inlet angle is formed between the second connecting blade and the bottom plane, and the first-order wind inlet angle is larger than the second-order wind inlet angle; the inner end of the second connecting blade is fixedly connected with the inner side connecting disc, the outer sheet of the first connecting blade is fixedly connected with the outer side circular ring, and the connecting sheets are uniformly distributed between the outer side circular ring and the inner side connecting disc. The design of the double-step blade is adopted, the design of different wind angles of the step blade ensures that the same blade has two different wind angles simultaneously when the fan blade runs, the turbulent flow formed by airflow is favorably dispersed, the fan noise is reduced, the lateral ring design of the fan blade ensures the balance stability and strong wind pressure of the fan running, the unbalance amount of the fan blade is greatly reduced, and the deformation and the outward expansion of the blade are avoided when the turbulent flow noise of the fan running is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a perspective view of a dual-blade axial fan in accordance with a preferred embodiment of the present invention;

FIG. 2 is a perspective view of the dual-stage blade axial fan shown in FIG. 1;

FIG. 3 is a front view of the dual-stage blade axial fan of FIG. 1;

FIG. 4 is a partial perspective view of the dual-stage blade axial fan shown in FIG. 1;

FIG. 5 is a perspective view of a connecting blade of the dual-stage blade axial fan shown in FIG. 1;

fig. 6 is a perspective view of the connecting piece shown in fig. 5.

In the figure: 10. an outer ring; 20. an inner side connecting disc; 30. connecting sheets; 31. a first connecting blade; 311. a thick leaf portion; 312. a thin leaf portion; 32. and a second connecting blade.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-6, a dual-stage blade axial fan includes an outer ring 10, an inner connecting disc 20, and a plurality of connecting pieces 30, where each connecting piece 30 includes a first connecting blade 31 and a second connecting blade 32, an end of the first connecting blade 31 is connected to an end of the second connecting blade 32, the connecting piece 30 is provided with a bottom plane, a first-order wind inlet angle is formed between the first connecting blade 31 and the bottom plane, a second-order wind inlet angle is formed between the second connecting blade 32 and the bottom plane, and the first-order wind inlet angle is greater than the second-order wind inlet angle; the inner end of the second connecting blade 32 is fixedly connected with the inner connecting disc 20, the outer sheet of the first connecting blade 31 is fixedly connected with the outer circular ring 10, and the connecting pieces 30 are uniformly distributed between the outer circular ring 10 and the inner connecting disc 20. The design of the double-step blade is adopted, the design of different wind angles of the step blade ensures that the same blade has two different wind angles simultaneously when the fan blade runs, the turbulent flow formed by airflow is favorably dispersed, the fan noise is reduced, the lateral ring design of the fan blade ensures the balance stability and strong wind pressure of the fan running, the unbalance amount of the fan blade is greatly reduced, and the deformation and the outward expansion of the blade are avoided when the turbulent flow noise of the fan running is reduced.

Specifically, in actual use, the diameter of the outer ring 10 is equal to the outer diameter of the first connecting blade 31 or the diameter of the second connecting blade 32, so that the wind shear resistance is reduced, the vibration generated by the fan is reduced, and the overall noise generated by the operation of the fan is reduced.

Preferably, the first connecting blade 31 has a width greater than that of the second connecting blade 32. The end surfaces of the first connecting blade 31 and the second connecting blade 32 are both arc-shaped. The first connecting blade 31 includes a thick blade portion 311, and a thin blade portion 312 connected to the thick blade portion 311. The inner connecting disc 20 is disc-shaped, and the circle center of the inner connecting disc 20 coincides with the circle center of the outer ring 10. Whole device compact structure, novel structure, design benefit, the suitability is strong, the facilitate promotion.

Compared with the traditional fan blade under the same noise, the wind quantity is Q for short, the wind pressure is P, the rotating speed provides 15%, the P-Q performance is greatly improved, and experimental data show that P is equivalent to 35% improvement, and Q is equivalent to 39% improvement. The heat-clearing performance of the same radiator and the same heat source is greatly improved compared with that of the traditional fan blades under the same module noise; experimental data show that Δ T is: the average Tc-Tfan increase was 8.53 degrees, corresponding to a 15% increase.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a two-stage flabellum axial fan, includes outside ring, inboard connection pad, a plurality of connection piece, its characterized in that:

the connecting piece comprises a first connecting blade and a second connecting blade, the end part of the first connecting blade is connected with the end part of the second connecting blade, the connecting piece is provided with a bottom plane, a first-order wind inlet angle is formed between the first connecting blade and the bottom plane, a second-order wind inlet angle is formed between the second connecting blade and the bottom plane, and the first-order wind inlet angle is larger than the second-order wind inlet angle;

the inner end of the second connecting blade is fixedly connected with the inner side connecting disc, the outer sheet of the first connecting blade is fixedly connected with the outer side circular ring, and the connecting sheets are uniformly distributed between the outer side circular ring and the inner side connecting disc.

2. The dual-stage blade axial fan of claim 1, wherein: the first connecting blade has a width greater than that of the second connecting blade.

3. The dual-stage blade axial fan of claim 1, wherein: the end surfaces of the first connecting blade and the second connecting blade are arc-shaped.

4. The dual-stage blade axial fan of claim 1, wherein: the first connecting blade comprises a thick blade part and a thin blade part connected with the thick blade part.

5. The dual-stage blade axial fan of claim 1, wherein: the inner side connecting disc is disc-shaped, and the circle center of the inner side connecting disc is coincided with the circle center of the outer side circular ring.