CN215633963U

CN215633963U - Axial flow fan blade with less air loss

Info

Publication number: CN215633963U
Application number: CN202121566489.0U
Authority: CN
Inventors: 麦境治; 叶涛; 覃万翔; 韦宏茂; 王汉波
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2022-01-25
Anticipated expiration: 2031-07-09

Abstract

The utility model discloses an axial flow fan blade with less air volume loss, which comprises a rotating shaft and blades, wherein the blades are distributed around the rotating shaft and are provided with a pressure surface and a suction surface; a guide ring is arranged between the outer sides of the blades, and the blades are positioned on the inner side of the guide ring; an aileron is arranged on the outer side of the flow guide ring; by adopting the design of the ailerons of the guide ring, the airflow in the gap between the air duct and the blade flows out from inside to outside and is consistent with the main airflow direction of the axial flow fan blade, so that the gap backflow phenomenon is avoided, and the air volume loss phenomenon is reduced.

Description

Axial flow fan blade with less air loss

Technical Field

The utility model relates to the technical field of axial flow fan blades, in particular to an axial flow fan blade with less air volume loss.

Background

Because of the pressure difference between the pressure surface and the suction surface, the periphery of the common axial flow fan blade can generate vortex, which leads to air loss. In addition, in some situations, the axial flow fan blade needs to be used in cooperation with the air duct, for example, a heat dissipation fan of a household air conditioner outdoor unit has a gap between the fan blade and an outlet of the air duct, which inevitably causes air backflow and air volume loss.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the axial flow fan blade with less air quantity loss.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the axial flow fan blade with less air volume loss comprises a rotating shaft and blades, wherein the blades are distributed around the rotating shaft and are provided with a pressure surface and a suction surface; a guide ring is arranged between the outer sides of the blades, and the blades are positioned on the inner side of the guide ring; and an aileron is arranged on the outer side of the flow guide ring.

According to the axial flow fan blade with less air loss, the design of the auxiliary wings of the guide ring is adopted, so that airflow in a gap between the air channel and the blade flows out from inside to outside in the same direction as the main airflow direction of the axial flow fan blade, the gap backflow phenomenon is avoided, and the air loss phenomenon is reduced.

As some preferred embodiments of the utility model, the ailerons comprise a long cambered surface and a short cambered surface.

As some preferred embodiments of the present invention, the rotation shaft extends in front and rear side directions;

the long arc surface and the pressure surface are positioned in front of the rotating surface of the axial flow fan blade, and the short arc surface and the suction surface are positioned in back of the rotating surface of the axial flow fan blade.

As some preferred embodiments of the present invention, the guide ring is located at a forward position of the blade.

As some preferred embodiments of the utility model, the angle of attack of the aileron is-10 ° to 10 °.

According to some preferred embodiments of the utility model, the length of the front side and the rear side of the guide ring is defined as the length of the guide ring, the maximum length of the front side and the rear side of the aileron is defined as the thickness of the aileron, and the value ratio of the length of the guide ring to the thickness of the aileron is 2-4.

The utility model has the beneficial effects that:

1. by adopting the design of the ailerons of the guide ring, the airflow in the gap between the air duct and the blade flows out from inside to outside and is consistent with the main airflow direction of the axial flow fan blade, so that the gap backflow phenomenon is avoided, and the air volume loss phenomenon is reduced;

2. the axial pressure difference directions of the ailerons and the axial flow fan blades are opposite, so the axial stress directions of the ailerons and the axial flow fan blades are opposite, the axial resultant force of the blades is reduced, and the possibility of fracture of the blade roots of the blades is reduced.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is an operational view of the flap and duct outlet positions of the present invention;

FIG. 4 is a schematic axial force diagram of the present invention.

Reference numerals:

the rotary shaft 100, the blades 200, the guide ring 300, the ailerons 400, the long cambered surface 410 and the short cambered surface 420.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the utility model can be practiced without these specific details, i.e., those skilled in the art can more effectively introduce the essential nature of their work to others skilled in the art using the description and presentation herein.

Furthermore, it should be noted that the terms "front side", "rear side", and the like used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a specific component, and simple, non-inventive adjustments to the above directions by those skilled in the art should not be construed as techniques outside the scope of the present application.

It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe arrangements, etc., have not been described in detail since they are readily understood by those of ordinary skill in the art, in order to avoid obscuring the present invention.

Fig. 1 is a perspective view of an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention provides an axial-flow fan blade with less air loss, including a rotating shaft 100 and blades 200, wherein the blades 200 are distributed around the rotating shaft 100, and the blades 200 have a pressure surface and a suction surface.

Further, referring to fig. 2, a guide ring 300 is disposed between the outer sides of the blades 200, and the blades 200 are disposed inside the guide ring 300. The guide ring 300, in addition to guiding the flow, has a strengthening effect on the structure of the blade 200.

Still further, an aileron 400 is arranged outside the flow guide ring 300.

During actual work, the axial flow fan blade is matched with an air duct for use. Referring to fig. 3, when the axial flow fan blade rotates, due to the pressure difference between the two sides of the aileron, the airflow in the gap between the outlet of the air duct and the blade 200 flows out from inside to outside, and is consistent with the main flow direction of the airflow, so that the gap backflow phenomenon is avoided.

The axial flow fan blade with less air loss disclosed above is only a preferred embodiment of the present invention, and is only used for illustrating the technical solution of the present invention, and is not limited thereto. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details representative of one or more embodiments are not necessarily indicative of any particular order, nor are they intended to be limiting.

In some embodiments, the flap 400 includes a long cambered surface 410 and a short cambered surface 420 for better flow guidance. When the fan blade rotates, the airflow speed on the surface of the cambered surface 410 of the aileron 400 is higher than that on the surface of the short cambered surface 420, the pressure on the surface of the cambered surface 410 is lower than that of the short cambered surface 420, the outer end of the aileron 400 generates vortex, the direction of the vortex points to the front side from the rear side of the rotating surface and is the same as the airflow main flow direction of the blade 200, and therefore the air quantity loss is reduced.

In some embodiments, the shaft 100 extends in a front-to-rear direction. The long cambered surface 410 and the pressure surface are positioned on the front side of the rotating surface of the axial flow fan blade, and the short cambered surface 420 and the suction surface are positioned on the rear side of the rotating surface of the axial flow fan blade.

Referring to fig. 4, when the axial flow fan blade rotates, the axial pressure difference and the stress of the two sides of the aileron 400 are just opposite to the axial pressure difference and the stress of the blade 200, so that the outer end of the aileron 400 generates a vortex, the direction of the vortex points to the front side from the rear side of the rotating surface, and the vortex is the same as the main flow direction of the airflow of the blade 200, thereby reducing the air loss. Meanwhile, the axial resultant force of the blade 200 is reduced, and the possibility of blade root fracture of the blade 200 is reduced.

In some embodiments, the guide ring 300 is located at the front position of the blade 200 to ensure the guide effect.

In some embodiments, the angle of attack of the aileron 400 is-10 to 10, and the aileron 400 does not adversely affect the blowing effect, thereby ensuring the flow guiding effect of the aileron 400.

In some embodiments, the length of the front side and the rear side of the guide ring 300 is defined as the length of the guide ring, the maximum length of the front side and the rear side of the aileron 400 is defined as the thickness of the aileron, and the ratio of the length of the guide ring to the thickness of the aileron is 2-4, so that the guide effect is ensured.

The present invention can be modified and adapted appropriately from the above-described embodiments, according to the principles described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides an axial compressor fan blade that amount of wind loss is less, includes pivot (100), blade (200) are around pivot (100) distribute, blade (200) have pressure surface, suction surface, its characterized in that:

a guide ring (300) is arranged between the outer sides of the blades (200), and the blades (200) are positioned on the inner side of the guide ring (300);

and an aileron (400) is arranged on the outer side of the guide ring (300).

2. The axial-flow fan blade with less air volume loss according to claim 1, characterized in that: the aileron (400) comprises a long cambered surface (410) and a short cambered surface (420).

3. The axial-flow fan blade with less air volume loss according to claim 2, characterized in that: the rotating shaft (100) extends along the front and rear side directions;

the long arc surface (410) and the pressure surface are positioned on the front side of the rotating surface of the axial flow fan blade, and the short arc surface (420) and the suction surface are positioned on the rear side of the rotating surface of the axial flow fan blade.

4. The axial-flow fan blade with less air volume loss according to claim 3, characterized in that: the guide ring (300) is positioned at the position close to the front side of the blade (200).

5. The axial-flow fan blade with less air volume loss according to claim 3, characterized in that: the angle of attack of the ailerons (400) is-10 to 10 degrees.

6. The axial-flow fan blade with less air volume loss according to claim 1, characterized in that: the length of the front side and the rear side of the guide ring (300) is defined as the length of the guide ring, the maximum length of the front side and the rear side of the aileron (400) is defined as the thickness of the aileron, and the value ratio of the length of the guide ring to the thickness of the aileron is 2-4.