CN216381967U

CN216381967U - Axial fan with double-stage blades

Info

Publication number: CN216381967U
Application number: CN202121989817.8U
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 connecting ring, a middle connecting piece and a plurality of double-order blade main bodies, wherein each double-order blade main body comprises an outer first-order blade and an inner second-order blade; the outer sheet of the first-order blade on the outer side is fixedly connected with the connecting ring on the outer side, and the main bodies of the plurality of double-order blades are uniformly distributed between the connecting ring on the outer side and the middle connecting piece. 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-stage blade axial flow fan comprises an outer connecting ring, a middle connecting piece and a plurality of double-stage blade main bodies, wherein each double-stage blade main body comprises an outer first-stage blade and an inner second-stage blade, the end part of each outer first-stage blade is connected with the end part of each inner second-stage blade, each double-stage blade main body is provided with a bottom plane, a first-stage wind inlet angle is formed between each outer first-stage blade and the bottom plane, a second-stage wind inlet angle is formed between each inner second-stage blade and the bottom plane, and the first-stage wind inlet angle is smaller than the second-stage wind inlet angle; the inner end of the inner side second-order blade is fixedly connected with the middle connecting piece, the outer single of the outer side first-order blade is fixedly connected with the outer side connecting ring, and the plurality of double-order blade main bodies are uniformly distributed between the outer side connecting ring and the middle connecting piece.

Further, the width of the outer first-order blade is larger than that of the inner second-order blade.

Furthermore, the end surfaces of the first-order blades on the outer side and the second-order blades on the inner side are both arc-shaped.

Further, the outer first-order blade comprises a thick blade part and a thin blade part connected with the thick blade part.

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

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

a first-order wind inlet angle is formed between the outer first-order blade and the bottom plane, a second-order wind inlet angle is formed between the inner second-order blade and the bottom plane, and the first-order wind inlet angle is smaller than the second-order wind inlet angle; the inner end of the inner side second-order blade is fixedly connected with the middle connecting piece, the outer single of the outer side first-order blade is fixedly connected with the outer side connecting ring, and the plurality of double-order blade main bodies are uniformly distributed between the outer side connecting ring and the middle connecting piece. 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.

In the figure: 10. an outer connecting ring; 20. a middle connecting piece; 30. a dual-step blade body; 31. the first-order blade on the outer side; 311. a thick leaf portion; 312. a thin leaf portion; 32. and an inner second-order 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 to 4, an axial flow fan with double-stage blades comprises an outer connecting ring 10, a middle connecting piece 20 and a plurality of double-stage blade main bodies 30, wherein each double-stage blade main body 30 comprises an outer first-stage blade 31 and an inner second-stage blade 32, the end of the outer first-stage blade 31 is connected with the end of the inner second-stage blade 32, each double-stage blade main body 30 is provided with a bottom plane, a first-stage inlet angle is formed between the outer first-stage blade 31 and the bottom plane, a second-stage inlet angle is formed between the inner second-stage blade 32 and the bottom plane, and the first-stage inlet angle is smaller than the second-stage inlet angle; the inner ends of the inner second-order blades 32 are fixedly connected with the middle connecting piece 20, the outer single blade of the outer first-order blade 31 is fixedly connected with the outer connecting ring 10, and the double-order blade main bodies 30 are uniformly distributed between the outer connecting ring 10 and the middle connecting piece 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 connecting ring 10 is equal to the outer diameter of the outer first-order blade 31 or the diameter of the inner second-order 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 width of the outer first-order blade 31 is larger than that of the inner second-order blade 32. The end surfaces of the first-order blades 31 on the outer side and the second-order blades 32 on the inner side are both arc-shaped. The outer first-order blade 31 includes a thick blade portion 311 and a thin blade portion 312 connected to the thick blade portion 311. The middle connecting piece 20 is disc-shaped, and the circle center of the middle connecting piece 20 coincides with the circle center of the outer connecting 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 rank flabellum axial fan, includes outside go-between, middle part connecting piece, a plurality of two rank blade main parts, its characterized in that:

the double-step blade main body comprises an outer first-step blade and an inner second-step blade, the end part of the outer first-step blade is connected with the end part of the inner second-step blade, the double-step blade main body is provided with a bottom plane, a first-order wind inlet angle is formed between the outer first-step blade and the bottom plane, a second-order wind inlet angle is formed between the inner second-step blade and the bottom plane, and the first-order wind inlet angle is smaller than the second-order wind inlet angle;

the inner end of the inner side second-order blade is fixedly connected with the middle connecting piece, the outer single of the outer side first-order blade is fixedly connected with the outer side connecting ring, and the plurality of double-order blade main bodies are uniformly distributed between the outer side connecting ring and the middle connecting piece.

2. The dual-stage blade axial fan of claim 1, wherein: the width of the outer first-order blade is larger than that of the inner second-order blade.

3. The dual-stage blade axial fan of claim 1, wherein: the end surfaces of the first-order blades on the outer side and the second-order blades on the inner side are arc-shaped.

4. The dual-stage blade axial fan of claim 1, wherein: the outer first-order 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 middle connecting piece is disc-shaped, and the circle center of the middle connecting piece coincides with the circle center of the outer connecting ring.