CN216407268U

CN216407268U - Fan blade

Info

Publication number: CN216407268U
Application number: CN202121327138.4U
Authority: CN
Inventors: 陈泽峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-04-29
Anticipated expiration: 2031-06-15

Abstract

The utility model relates to the technical field of fan blade products, in particular to a fan blade, which comprises a hub and a plurality of groups of blades which are annularly distributed on the outer side surface of the hub, wherein the bottom edge surface of each blade is provided with a first arc surface part extending towards the left, the wing end of each blade is provided with a second arc surface part extending from the bottom edge surface of each blade towards the top edge surface of each blade in an anticlockwise mode, the top edge surface of each blade is provided with a third arc surface part, and the third arc surface part is provided with a concave surface part The second arc enables the fan blade to have better bearing capacity when bearing wind pressure, and durability of the fan blade is improved.

Description

Fan blade

Technical Field

The utility model relates to the technical field of fan blade products, in particular to a fan blade.

Background

In daily life, the fan blade is often used as a main way for generating wind power, in the prior art, the wind volume, wind pressure and noise of the fan blade are one of important factors for measuring the quality of the fan blade, and the noise generated by the fan blade in the rotating process affects the life of people.

Disclosure of Invention

The utility model aims to provide a fan blade which is designed for solving at least one technical problem in the background technology.

In order to achieve the purpose, the utility model adopts the following scheme: the utility model provides a fan blade, includes that wheel hub and multiunit blade ring form distribute on the wheel hub lateral surface, the bottom edge face of blade is provided with towards the first cambered surface portion of left extension, the winged end of blade is provided with certainly the bottom edge face of blade is towards the second cambered surface portion of the top edge face and the anticlockwise extension of blade, the top edge face of blade is provided with third cambered surface portion, be provided with concave surface portion on the third cambered surface portion.

Wherein the notch of the concave portion is disposed toward the tip outer side away from the blade.

And a tilting part is arranged at the joint of the third cambered surface part and the wing end of the blade, and the sharp angle of the tilting part faces towards the anticlockwise direction of the fan blade.

The distance from the tilting part to the blade bottom edge surface is greater than the distance from the other end, far away from the tilting part, of the blade top edge surface to the blade bottom edge surface.

Wherein the thickness of the blade top edge surface is close to or equal to the thickness of the blade bottom edge surface.

The blade comprises a suction surface and a pressure surface, and the thickness between the suction surface and the pressure surface is 1-1.8 mm.

The arc width of the third cambered surface part far away from the hub is 1.8-2 mm.

Wherein, the suction surface with the wheel hub junction is provided with first circular arc.

And a second arc is arranged at the joint of the pressure surface and the hub.

The number of the blades is 7 or 9, and the blades are annularly distributed on the outer side face of the hub anticlockwise.

Wherein the angle (b) of the sharp angle on the suction surface is 46.5 °.

Wherein, the contained angle (a) between the bottom edge of blade and the radial line of fan blade extends to 21.5 from 15 gradually.

The fan blade has the advantages that the tangential plane of the fan blade is improved by arranging the first cambered surface portion, the second cambered surface portion and the third cambered surface portion, air flow generated in rotation can better and smoothly enter the suction surface, the air quantity generated by the fan blade is improved, the volume of air cut by the fan blade is reduced by arranging the angle of the fan blade, the softness and comfort of wind power generated by the fan blade are improved, the noise of the fan blade is reduced, the size of the fan blade is not changed by arranging the thickness of the fan blade, the air quantity generated by rotation of the fan blade and the borne wind pressure are improved, and the first circular arc and the second circular arc are arranged, so that the fan blade has better bearing capacity when bearing the wind pressure, and the durability of the fan blade is improved.

Drawings

FIG. 1 is a schematic structural diagram of a fan blade;

FIG. 2 is a schematic structural diagram of a fan blade;

FIG. 3 is a schematic structural diagram of a fan blade;

fig. 4 is a schematic structural diagram of a fan blade.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the purpose of the drawings is to graphically supplement the description of the text portion of the specification, so that each feature and the whole technical solution of the present invention can be visually and vividly understood, but the scope of the present invention should not be construed as being limited thereto.

In the description of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. When a feature is referred to as being "disposed," "secured," or "connected" to another feature, it can be directly disposed, secured, or connected to the other feature or be indirectly disposed, secured, or connected to the other feature.

In the description of the present invention, if "a number" is referred to, it means one or more, if "a number" is referred to, it means two or more, if "more than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

In addition, unless defined otherwise, 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Example (b): as shown in the figures 1-4 of the drawings,

structure 1: the utility model provides a fan blade, is in including hub 1 and the 2 annular distributions of multiunit blade on the 1 lateral surface of hub, the bottom edge face of blade 2 is provided with towards left first arc face portion 201 that extends, the winged end of blade 2 is provided with certainly the bottom edge face of blade 2 is towards the second arc face portion 202 of the top edge face and the anticlockwise extension of blade 2, the top edge face of blade 2 is provided with third arc face portion 203, be provided with concave surface portion 2031 on the third arc face portion 203 for when the fan blade produces the amount of wind in the rotation, the better gathering of wind energy improves the amount of wind of fan blade between blade and blade, and the noise that vibrations and the production of fan blade when rotating can be reduced in first arc face portion, second arc face portion, the setting of third arc face portion simultaneously.

The concave of the concave surface 2031 faces the top outer side far away from the blade 2, so that the noise generated by the blade can be reduced when the fan blade rotates.

The third cambered surface portion 203 and the connection position of the wing end of the blade 2 are provided with a tilting portion 204, the sharp angle of the tilting portion 204 faces towards the anticlockwise direction of the fan blade, and the fan blade can have higher wind power and improve the wind volume of the fan blade when rotating.

The distance from the tilting part 204 to the bottom edge surface of the blade 2 is greater than the distance from the top edge surface of the blade 2 to the other end of the tilting part 204 to the bottom edge surface of the blade 2, so that the blade can bear greater pressure when rotating, the blade is not easy to break, and the stability of the fan blade is improved.

The thickness of the top edge surface of the blade 2 is close to or equal to that of the bottom edge surface of the blade 2, and the blades enable the wind quantity generated by the fan blade to be increased when the fan blade rotates.

The blade 2 comprises a suction surface 205 and a pressure surface 206, wherein the thickness between the suction surface 205 and the pressure surface 206 is 1-1.8 mm, so that the wind volume and the wind pressure of the fan blade can be improved under the condition that the size of the fan blade is not changed.

The arc width of the third cambered surface portion 203 far away from the hub 1 is 1.8-2 mm, so that air flow can enter a suction surface along the third cambered surface portion when flowing through the wing end of the blade, the wind pressure of the blade at the wing end is reduced, and the durability of the blade is improved.

The first arc 207 is arranged at the joint of the suction surface 205 and the hub 1, so that the pressure bearing capacity of the suction surface is improved.

Wherein, the joint of the pressure surface 206 and the hub 1 is provided with a second arc 208, so as to improve the pressure bearing capacity of the pressure surface.

Wherein, the number of the blades 2 is 7 or 9, and the blades are annularly distributed on the outer side surface of the hub anticlockwise.

The angle (b) of the sharp corner on the suction surface 205 is 46.5 degrees, so that the volume of air cut by the fan blade is reduced, the softness and comfort of wind power generated by the fan blade are improved, and the noise of the fan blade is reduced.

The included angle (a) between the bottom edge of the blade 2 and the radial line of the fan blade gradually extends from 15 degrees to 21.5 degrees, so that the volume of air cut by the fan blade is reduced, the softness and comfort of wind power generated by the fan blade are improved, and the noise of the fan blade is reduced.

Structure 2: the difference with the fan blade according to structure 1 is that the angle (b) of the sharp corner on the suction surface 205 is 43.5 °.

Structure 3: the difference with the fan blade of structure 1 is that the angle (b) of the sharp corner on the suction surface 205 is 49.5 °.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a fan blade, includes wheel hub, and multiunit blade annular distributes on the wheel hub lateral surface, its characterized in that: the bottom edge face of blade is provided with towards the first cambered surface portion of left extension, the winged end of blade is provided with certainly the bottom edge face of blade is towards the second cambered surface portion of the top edge face and the anticlockwise extension of blade, the top edge face of blade is provided with the third cambered surface portion, be provided with concave surface portion on the third cambered surface portion.

2. A fan blade according to claim 1, wherein: the recess of the concave portion is disposed toward the tip outer side away from the blade.

3. A fan blade according to claim 1 or 2, wherein: and a tilting part is arranged at the joint of the third cambered surface part and the wing end of the blade, and the sharp angle of the tilting part faces towards the anticlockwise direction of the fan blade.

4. A fan blade according to claim 3, wherein: the distance from the tilting part to the bottom edge surface of the blade is greater than the distance from the other end, far away from the tilting part, of the top edge surface of the blade to the bottom edge surface of the blade.

5. The fan blade of claim 4, wherein: the thickness of the blade top edge surface is close to or equal to the thickness of the blade bottom edge surface.

6. The fan blade of claim 5, wherein: the blade comprises a suction surface and a pressure surface, and the thickness between the suction surface and the pressure surface is 1-1.8 mm.

7. A fan blade according to claim 1 or 6, wherein: the arc width of the third cambered surface part far away from the hub is 1.8-2 mm.

8. The fan blade of claim 6, wherein: a first arc is arranged at the joint of the suction surface and the hub.

9. The fan blade of claim 8, wherein: and a second arc is arranged at the joint of the pressure surface and the hub.

10. A fan blade according to claim 9, wherein: the number of the blades is 7 or 9, and the blades are annularly distributed on the outer side face of the hub anticlockwise.

11. The fan blade of claim 6, wherein: the angle (b) of the sharp angle on the suction surface is 46.5 ± 3 °.

12. A fan blade according to claim 1 or 11, wherein: an included angle (a) between the bottom edge of each blade and the radial line of each fan blade gradually extends from 15 degrees to 21.5 degrees.