CN218717699U

CN218717699U - Fan blade, axial flow fan and air conditioner

Info

Publication number: CN218717699U
Application number: CN202222982637.8U
Authority: CN
Inventors: 马兆俊; 袁国炉; 刘莹; 张帅; 杨昌怀; 莫文斌
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-03-24
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses a fan blade, axial fan and air conditioner is equipped with at least one layer line region on fan blade's the suction surface, and every layer line region separates into a plurality of adjacent blade segments in proper order along fan blade's rotation direction, reduces in proper order along the thickness of all blade segments of rotation direction, makes the crossing department of two arbitrary adjacent blade segments produce the thickness drop. The utility model provides a fan blade sets up the blade segment section that a plurality of thickness reduce in proper order through the rotation direction along fan blade on the suction surface, makes the crossing department of two continuous blade segment sections produce the thickness drop to be formed with the drop structure of echelonment on fan blade's suction surface, this echelonment drop structure can disperse the air current on suction surface, prevents that the vortex from producing the noise reduction.

Description

Fan blade, axial flow fan and air conditioner

Technical Field

The utility model relates to a fan technical field especially relates to a fan blade, axial fan and air conditioner.

Background

The axial flow fan is a machine which increases the gas pressure and discharges the gas by means of the input mechanical energy. It is widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; the propulsion of wind tunnel wind source and air cushion ship inflation, etc. have very important application in various national economy industries. However, when the fan blades rotate, a vortex flow is generated, which causes noise in the axial flow fan. Therefore, in order to reduce the noise of the axial flow fan, the generation of vortex flow during the rotation of the fan blades should be prevented.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve among the above-mentioned prior art technical problem that axial fan during operation noise is big, provide a fan blade, axial fan and air conditioner.

The utility model adopts the technical proposal that:

the utility model provides a fan blade, axial fan and air conditioner, wherein be equipped with at least one layer line region, every on fan blade's the suction surface layer line region along a plurality of adjacent blade segments in proper order are separated into to fan blade's direction of rotation, all along the direction of rotation blade segment's thickness reduces in proper order, makes two arbitrary adjacent the crossing department of blade segment produces the thickness drop.

Further, every be equipped with multichannel water conservancy diversion stripe on the blade section, every the water conservancy diversion stripe sets up along the direction of rotation on the suction surface, multichannel the water conservancy diversion stripe along fan blade's span is to the direction interval setting in proper order.

Preferably, a first lamination area and a second lamination area are sequentially arranged on the suction surface of the fan blade along the rotation direction, the intersection of any two adjacent blade segments in the first lamination area and the second lamination area is arc-shaped, and the sweep angle of the blade segment in the first lamination area is greater than that of the blade segment in the second lamination area.

Preferably, the length of the blade segment in the first lamination area in the rotation direction is 30mm-40mm, and the thickness variation value of the intersection of any two adjacent blade segments in the first lamination area is 1mm-2mm.

Preferably, the length of the blade segment in the second lamination area in the rotation direction is 17mm-19mm, and the thickness deviation value of the intersection of any two adjacent blade segments in the second lamination area is 0.7mm-0.8mm.

Preferably, the ratio of the distance between the guide stripe nearest to the root of the fan blade and the root of the fan blade to the spanwise length of the fan blade is 0.4.

Preferably, the ratio of the distance between the guide stripe farthest from the root of the fan blade and the root of the fan blade to the spanwise length of the fan blade is 0.9.

Preferably, the fan blade is a reverse curved fan blade.

The axial flow fan comprises a hub and the fan blades, wherein the fan blades are distributed on the peripheral wall of the hub at intervals along the circumferential direction of the hub.

An air conditioner comprising an axial flow fan as hereinbefore described.

Compared with the prior art, the utility model provides a fan blade sets up the blade segment section that a plurality of thickness reduce in proper order through the rotation direction along fan blade on the suction surface, makes the crossing department of two continuous blade segment sections produce the thickness drop to be formed with the drop structure of echelonment on fan blade's suction surface, this echelonment drop structure can disperse the air current on suction surface, prevents that the vortex from producing the noise reduction.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural view of an axial flow fan in an embodiment of the present invention;

fig. 2 is a schematic structural view of a fan blade according to an embodiment of the present invention;

fig. 3 is a schematic structural view of another view angle of the fan blade according to the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a fan blade according to an embodiment of the present invention;

1. a fan blade; 11. a first ply area; 12. a second ply grain region; 13. a blade segment; 14. flow guide stripes; 2, a hub.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The axial flow fan is a machine which increases the gas pressure and discharges the gas by means of the input mechanical energy. It is widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilating and air inducing of boilers and industrial kilns; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; the wind source of wind tunnel and the propulsion of air-cushion ship are applied in national economy. However, when the fan blades rotate, a vortex is generated, causing the axial flow fan to generate noise. Therefore, in order to reduce the noise of the axial flow fan, it is necessary to prevent the generation of a vortex flow during the rotation of the fan blades.

Therefore, in order to solve the technical problem that the fan blade of axial fan among the prior art produces the vortex and leads to the noise big rotating the in-process, the utility model provides a fan blade:

the suction surface of the fan blade is provided with at least one striation area, each striation area is divided into a plurality of adjacent blade sections in sequence along the rotation direction of the fan blade, and the thickness of all the blade sections on each fan blade is reduced in sequence along the rotation direction of the fan blade, so that the thickness difference is generated at the intersection of any two adjacent blade sections. Therefore, a step-shaped fall structure is formed on the suction surface of each fan blade along the rotation direction of the fan blade, and the step-shaped fall structure can disperse the airflow on the surface of the suction surface, prevent the generation of vortex and reduce the noise.

In conclusion, the utility model provides a fan blade sets up a plurality of thickness blade segments that reduce in proper order through the direction of rotation along fan blade on the suction surface, makes the crossing department of two continuous blade segments produce the thickness drop to be formed with the drop structure of echelonment on fan blade's suction surface, this echelonment drop structure can disperse the air current on suction surface, prevents that the vortex from producing, the noise reduction.

The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1 to 3, in the present embodiment, a first striation area 11 and a second striation area 12 are provided on a suction surface of the fan blade 1, the first striation area 11 and the second striation area 12 are sequentially arranged at intervals along a rotation direction of the fan blade 1, and both the first striation area 11 and the second striation area 12 extend from a root of the fan blade to a trailing edge of the fan blade along a spanwise direction of the fan blade. Along the rotation direction of the fan blade, the first lamination area 11 is divided into a plurality of sequentially adjacent blade segments 13, the intersection line between two adjacent blade segments 13 is an arc line, the thickness of each blade segment 13 is different, and the thicknesses of all the blade segments in the first lamination area along the rotation direction of the fan blade are sequentially reduced, so that the thickness difference is generated at the intersection of any two adjacent blade segments. The second striation area 12 is divided into a plurality of blade segments 13 which are connected in sequence along the rotation direction of the fan blade, the intersecting line between two adjacent blade segments is an arc line, the thickness of each blade segment is different, and the thickness of all the blade segments in the second striation area along the rotation direction of the fan blade is reduced in sequence, so that the thickness difference is formed at the intersecting position of any two adjacent blade segments. Meanwhile, the thicknesses of all the blade sections on the fan blade are sequentially reduced along the rotation direction of the fan blade, namely, a step-shaped fall structure is formed on the suction surface of the fan blade. And the sweep angle of the blade segment in the first lamination area 11 is greater than that of the blade segment in the second lamination area 12, and the sweep angle refers to an included angle alpha between a connecting line of two ends of an arc-shaped intersection line between any two adjacent blade segments and the diameter of the hub wheel.

Therefore, a step-shaped fall structure is formed on the suction surface of the fan blade, and the step-shaped structure is in a downhill trend along the rotation direction of the fan blade, so that the conversion of an airflow flowing layer on the surface of the suction surface can be accelerated, and airflow is dispersed to prevent the airflow from forming vortex to generate noise. Meanwhile, the grazing angle in the first layer of grain area is larger than that in the second layer of grain area, so that the speed change of the airflow flowing around the suction surface is more hierarchical, and the air quantity and the work doing efficiency of the axial flow fan are improved.

Specifically, as shown in fig. 4, it is found from a plurality of experiments that: the fan blade has the best effect of dispersing the airflow when the length L1 of a single blade segment in the rotation direction in the first laminar region 11 is 30mm-40mm, the length L2 of a single blade segment in the rotation direction in the second laminar region 12 is 17mm-19mm, the thickness deviation value H1 of the intersection of any two adjacent blade segments in the first laminar region 11 is 1mm-2mm, and the thickness deviation value H2 of the intersection of any two adjacent blade segments in the second laminar region 12 is 0.7mm-0.8mm.

Furthermore, the fan blade is in a reverse bending state, the fan blade in the reverse bending state can weaken the diffusion of airflow to the blade root of the fan blade, reduce the formation of large-scale eddy on the suction surface of the fan blade, and stabilize the flow of a flow field.

Further, in order to ensure that the airflow flows along the rotation direction of the fan blade, a plurality of guide stripes 14 are arranged on each blade segment, each guide stripe 14 is arranged on the suction surface of the fan blade and is arranged along the rotation direction of the fan blade, and the plurality of guide stripes are sequentially arranged at intervals along the spanwise direction of the fan blade.

Specifically, in order to promote the amount of wind, make axial fan's acting efficiency maximize in this embodiment, the distance between the nearest water conservancy diversion stripe apart from fan blade root: the length of the fan blade in the spanwise direction =0.4, and the distance between the guide stripe farthest from the fan blade root and the fan blade root: the length of the fan blade in the spanwise direction = 0.9.

In another embodiment, the fan blade 1 is provided with two adjacent first striation areas 11 and second striation areas 12 on the suction side along the shape direction, the first striation areas 11 and the second striation areas 12 covering the entire suction side of the fan blade 1. The first striation area 11 and the second striation area 12 both extend from the root of the fan blade to the trailing edge of the fan blade in the spanwise direction of the fan blade. Along the rotation direction of the fan blade, the first lamination area 11 is divided into a plurality of sequentially adjacent blade segments 13, the intersection line between two adjacent blade segments 13 is an arc line, the thickness of each blade segment 13 is different, and the thicknesses of all the blade segments in the first lamination area along the rotation direction of the fan blade are sequentially reduced, so that the thickness difference is generated at the intersection of any two adjacent blade segments. The second striation area 12 is divided into a plurality of blade segments 13 which are connected in sequence along the rotation direction of the fan blade, the intersecting line between two adjacent blade segments is an arc line, the thickness of each blade segment is different, and the thickness of all the blade segments in the second striation area along the rotation direction of the fan blade is reduced in sequence, so that the thickness difference is formed at the intersecting position of any two adjacent blade segments. Meanwhile, the thicknesses of all the blade sections on the fan blade are sequentially reduced along the rotation direction of the fan blade, namely, a step-shaped fall structure is formed on the suction surface of the fan blade. And the sweep angle of the blade segment in the first lamination area 11 is larger than that of the blade segment in the second lamination area 12, and the sweep angle refers to an included angle alpha between a connecting line at two ends of an arc-shaped intersection line between any two adjacent blade segments and the diameter of the hub wheel.

The utility model also provides an axial fan, including wheel hub 2 and the fan blade 1 that the above proposed, as shown in fig. 1, a plurality of fan blades distribute on wheel hub's perisporium along wheel hub's circumference interval ground, and wheel hub drives fan blade and rotates.

The utility model discloses still provide an air conditioner, axial fan including the above suggestion.

It is noted that the terminology used above is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Fan blade, its characterized in that, be equipped with at least one layer line region on fan blade's the suction surface, every layer line region is along fan blade's direction of rotation is separated into a plurality of adjacent blade sections in proper order, and all along the direction of rotation the thickness of blade section reduces in proper order, makes arbitrary two adjacent the crossing department of blade section produces the thickness fall.

2. The fan blade according to claim 1, wherein a plurality of flow guiding stripes are disposed on each of the blade segments, each of the flow guiding stripes is disposed on the suction surface along a rotation direction, and the plurality of flow guiding stripes are sequentially disposed at intervals along a spanwise direction of the fan blade.

3. The fan blade according to claim 1, wherein the suction surface of the fan blade is provided with a first striation area and a second striation area in sequence along the rotational direction, the intersection of any two adjacent blade segments in the first striation area and the second striation area being curved, and the sweep angle of the blade segment in the first striation area being greater than the sweep angle of the blade segment in the second striation area.

4. The fan blade according to claim 3, wherein the blade segments in the first lamination area have a length in the rotational direction of 30mm to 40mm, and the thickness variation at the intersection of any two adjacent blade segments in the first lamination area is 1mm to 2mm.

5. The fan blade according to claim 4, wherein the blade segments in the second striation zone have a length in the rotational direction of 17mm to 19mm, and the thickness drop at the intersection of any two adjacent blade segments in the second striation zone is 0.7mm to 0.8mm.

6. The fan blade of claim 2 wherein the ratio of the distance of the guide strip nearest the fan blade root to the spanwise length of the fan blade is 0.4.

7. The fan blade according to claim 2 wherein the ratio of the distance between the flow guide stripe furthest from the fan blade root to the spanwise length of the fan blade is 0.9.

8. The fan blade of claim 1 wherein the fan blade is a reverse-curved fan blade.

9. Axial fan comprising a hub, characterized in that it further comprises a fan blade according to any one of claims 1 to 8, a plurality of fan blades being distributed on the peripheral wall of said hub at intervals along the circumferential direction of said hub.

10. An air conditioner characterized by comprising the axial flow fan according to claim 9.