Fan blade and fan

Abstract

The fan blade comprises a fan blade body and a layering structure, the fan blade body is provided with an inner cavity, a front edge end and a rear edge end are formed in the width direction of the fan blade body, the layering structure is arranged on the outer surface of the fan blade body, and the layering structure comprises a first part and a second part which are arranged in the width direction of the fan blade body; the first part and the second part are located on the two sides of the plane where the shearing center of the fan blade body is located, and the first part is heavier than the second part. According to the laying layer structure of the fan blade, the first part in the width direction is heavier than the second part, so that the shearing center is arranged towards one side of the front edge end, the first part and the second part are arranged in structures with different weights, adjustment of the shearing center is facilitated through arrangement of the laying layer structure, and the shearing efficiency of the fan blade is improved. Therefore, the stability of the fan blade is improved, long-term stable operation of the fan blade is guaranteed, and the problems that in the prior art, the fan blade is poor in stability, and long-term work is not facilitated are solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to fans, and in particular to a fan blade and a fan. Background Art

[0002] As an important part of renewable energy, wind power generation has developed rapidly around the world in recent years, especially in the fields of offshore wind power and low wind speed wind power. With the advancement of wind power technology and the promotion of market demand, the unit capacity of wind turbines has continued to increase, and the length of blades has gradually increased from the initial 30 meters to more than 100 meters. Even the world's longest wind turbine blade has reached 126 meters, which is matched by a 16-18MW offshore wind turbine. Although this large-scale trend has improved the utilization efficiency and economic benefits of wind energy, it has also brought new technical challenges, especially in the aerodynamic-structural dynamics of blades.

[0003] Large wind turbine blades, as a typical long and flexible structure, will undergo elastic deformation under the action of aerodynamic loads. This deformation will further affect the aerodynamic characteristics of the blades, forming a complex coupling relationship between aerodynamics and structure.

[0004] In the design of a fan, in order to improve the fan's energy efficiency, it is necessary to increase the speed of the blades to increase the fan's air output. However, increasing the speed of the blades will increase the momentum of the blades, thereby increasing the lift of the blades. Therefore, in the process of improving the fan's efficiency, it is necessary to optimize the blade structure to improve the stability of the blade structure.

[0005] For blades with a streamlined structure, the lift of the blades can be further improved by adopting materials with better performance and advanced technologies and processes, but the material cost and manufacturing cost will increase.

[0006] In order to improve the stability of the blade structure and reduce the manufacturing cost, it is necessary to design a special mechanism in the structure of the blade. For example, the prior art discloses a fan blade, including a blade body, the blade body including an inner cavity, the cross section of the blade body is a streamlined structure, that is, the cross section of the inner cavity is a streamlined structure, the inner cavity is arranged along the length direction of the blade body, one end of the inner cavity is provided with an air inlet, the other end of the inner cavity is provided with an air outlet, a plurality of reinforcing ribs are arranged in the blade body, the plurality of reinforcing ribs are evenly arranged along the length direction of the blade body, the plurality of reinforcing ribs surround a sandwich chamber, one end of the sandwich chamber is connected to the air outlet, and the other end of the sandwich chamber is connected to the inner cavity.

[0007] However, by arranging a plurality of reinforcing ribs in the inner cavity of the blade body to improve the strength of the blade body, the arrangement of the reinforcing ribs will increase the weight of the blade body, which is not conducive to improving the efficiency of the fan.

[0008] As can be seen from the above, the fan blades in the prior art have the problem of poor stability and are not conducive to long-term operation. Summary of the invention

[0009] The main purpose of the present invention is to provide a fan blade and a fan to solve the problem that the fan blade in the prior art has poor stability and is not conducive to long-term operation.

[0010] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a fan blade is provided, which includes a blade body and a lamination structure, the blade body having an inner cavity, the blade body forming a leading edge end and a trailing edge end along the width direction, the lamination structure being arranged on the outer surface of the blade body, the lamination structure including a first part and a second part arranged along the width of the blade body, the first part and the second part being located on both sides of the plane where the shear center of the blade body is located, and the weight of the first part is greater than the weight of the second part.

[0011] Further, the material density of the first portion is greater than the material density of the second portion.

[0012] Further, the first part and the second part are made of the same material, and the laying thickness of the first part is greater than the laying thickness of the second part.

[0013] Furthermore, the first part and the second part are made of the same material, and along the length direction of the wind blade body, the laying width of the first part is greater than the laying width of the second part.

[0014] Furthermore, the fan blade also includes a structural component, which is arranged on the inner surface of the blade body, and the structural component is arranged corresponding to the first part.

[0015] Furthermore, along the thickness direction of the fan blade, at least one of the upper surface and the lower surface of the inner cavity that are arranged opposite to each other has a structural member.

[0016] Furthermore, structural members are arranged on both the upper surface and the lower surface, and the structural members on the upper surface and the lower surface are arranged symmetrically.

[0017] Further, the structural member is a cloth; and / or the structural member is a coating.

[0018] Furthermore, the fan blade also includes a reinforcing plate, which is arranged in the inner cavity and between the shear center and the leading edge end along the width direction of the fan blade body; and a counterweight block, which is arranged on the reinforcing plate.

[0019] According to another aspect of the present invention, a fan is provided, and the fan comprises the above-mentioned fan blade.

[0020] Applying the technical solution of the present invention, a fan blade includes a blade body and a lamination structure, the blade body has an inner cavity, the blade body forms a leading edge end and a trailing edge end along the width direction, the lamination structure is arranged on the outer surface of the blade body, the lamination structure includes a first part and a second part arranged along the width of the blade body, the first part and the second part are located on both sides of the plane where the shear center of the blade body is located, and the weight of the first part is greater than the weight of the second part.

[0021] From the above, it can be seen that the ply structure of the fan blade of the present application adopts a first part along the width direction that is heavier than the second part, so as to realize the setting of the shear center toward the leading edge end. By adopting a structural setting of different weights for the first part and the second part, it is beneficial to adjust the shear center through the setting of the ply structure, thereby improving the stability of the fan blade to ensure the long-term stable operation of the fan blade.

[0022] In order to improve the strength of the fan blades, the present application can adjust the shear center of the blades so that the shear center of the blades is close to the leading edge and the aerodynamic center of the fan blades, thereby improving the strength of the fan blades. The fan blades are not easily deformed by force, which is beneficial to achieving the purpose of load reduction and improving the air-elastic coupling effect. It is also beneficial to achieve the stability of the fan blades during long-term outdoor work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic cross-sectional view of a fan blade of the present invention is shown;

[0025] Figure 2 The overall structural schematic diagram of the fan blade of the present invention is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Fan blade body; 110. Inner cavity; 120. Leading edge end; 130. Trailing edge end; 20. Structural member; 30. Reinforcement plate; 40. Counterweight block. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] In order to solve the problem in the prior art that the fan blades have poor stability and are not conducive to long-term operation, the present application provides a fan.

[0032] Among them, the wind turbine of the present application is a large-scale wind power generation wind turbine, which is used in offshore wind farms.

[0033] Specifically, the fan includes a fan body and fan blades arranged on the fan body, and the fan body drives the fan blades to rotate.

[0034] In this embodiment, the fan blades adjust the position of the shear center of the fan blades through structural settings to achieve the movement of the shear center toward the leading edge end 120, which is beneficial to improve the operating stability of the fan blades, thereby ensuring the stability of the fan operation and improving the power generation efficiency.

[0035] like Figure 1 and Figure 2 As shown, the fan blade includes a blade body 10 and a ply structure, the blade body 10 has an inner cavity 110, the blade body 10 forms a leading edge end 120 and a trailing edge end 130 along the width direction, the ply structure is arranged on the outer surface of the blade body 10, the ply structure includes a first part and a second part arranged along the width of the blade body 10, the first part and the second part are located on both sides of the plane where the shear center of the blade body 10 is located, and the weight of the first part is greater than the weight of the second part.

[0036] Among them, the cross-section of the fan blade is a streamlined structure, and the cross-section of the inner cavity 110 is a streamlined structure, which is formed in sequence along the width direction of the fan blade into a leading edge end 120, an aerodynamic center inside the cross-section, a shear center inside the cross-section and a trailing edge end 130.

[0037] Specifically, the ply structure of the fan blade of the present application adopts a first part along the width direction that is heavier than the second part, so as to realize the setting of the shear center toward the leading edge end 120. By adopting a structural setting of different weights for the first part and the second part, it is beneficial to adjust the shear center through the setting of the ply structure, thereby improving the stability of the fan blade to ensure the long-term stable operation of the fan blade.

[0038] The plane where the shear center is located is Figure 1The length direction of the fan blade body 10 is the X direction shown in the figure; the width direction of the fan blade body 10 is the Y direction shown in the figure.

[0039] In order to improve the strength of the fan blades, the present application can adjust the shear center of the blades so that the shear center of the blades is close to the leading edge 120 and also close to the aerodynamic center of the fan blades, thereby improving the strength of the fan blades. The fan blades are not easily deformed by force, which is beneficial to achieving the purpose of load reduction and improving the air-elastic coupling effect. It is also beneficial to achieve the stability of the fan blades during long-term outdoor work.

[0040] In this embodiment, the weight of the first part and the second part can be that the material density of the first part is greater than the material density of the second part. Without adding additional structures to destroy the overall structure, the material density is adjusted to achieve that the weight of the first part is greater than the weight of the second part. Wherein, by laying layers with different seals, the weight of the first part is greater than the weight of the second part. It should be noted that the weight of the first part is greater than the weight of the second part, which means that the weight of the first part per unit area is greater than the weight of the second part.

[0041] In another embodiment, the first part and the second part are made of the same material, and the laying thickness of the first part is greater than that of the second part. The first part of the present application is laid with a thickness greater than that of the second part, so the weight per unit area of ​​the first part is greater than that of the second part.

[0042] In another embodiment, the first part and the second part are made of the same material, and the laying width of the first part is greater than the laying width of the second part along the length direction of the fan blade body 10. By making the laying width of the first part greater than the laying width of the second part, it is helpful to increase the weight of the first part and the weight of the second part, so as to achieve the shear center being set toward the leading edge end 120, thereby improving the stability of the fan blade.

[0043] like Figure 1 and Figure 2 As shown, the fan blade further includes a structural member 20, which is disposed on the inner surface of the fan blade body 10, and the structural member 20 is disposed corresponding to the first portion.

[0044] Among them, by adding an area corresponding to the first part on the inner surface of the inner cavity 110 of the fan blade, the weight of the first part area is further increased to move the shear center toward the leading edge 120, thereby improving the overall structural strength of the fan blade and further improving the overall stability.

[0045] Specifically, along the thickness direction of the fan blade, at least one of the upper and lower surfaces of the inner cavity 110 that are arranged opposite to each other has a structural member 20. The structural member 20 is arranged on one of the surfaces between the upper and lower surfaces, so that the shear center is arranged toward the leading edge end 120; when the structural member 20 is arranged on both the upper and lower surfaces, it is beneficial to improve the structural strength of the fan blade and further ensure the stability of the structure.

[0046] In this embodiment, the upper surface and the lower surface are both provided with structural members 20, and the structural members 20 on the upper surface and the lower surface are symmetrically arranged. The structural members 20 on the upper surface and the lower surface are symmetrically arranged, which is conducive to ensuring the uniformity of the overall structural arrangement of the fan blades while ensuring the strength of the fan blades, thereby improving the stability of the structural arrangement.

[0047] In this embodiment, the structural member 20 is a cloth, and the cloth is attached to the inner surface of the inner cavity 110 .

[0048] In another embodiment, the structural member 20 is a coating, and the coating is coated on the inner surface of the inner cavity 110 .

[0049] like Figure 1 and Figure 2 As shown, the fan blade also includes a reinforcing plate 30 and a counterweight 40 . The reinforcing plate 30 is arranged in the inner cavity 110 . Along the width direction of the fan blade body 10 , the reinforcing plate 30 is arranged between the shear center and the leading edge end 120 , and the counterweight 40 is arranged on the reinforcing plate 30 .

[0050] Specifically, by arranging a reinforcing plate 30 and a counterweight block 40 on the inner cavity 110 in an area corresponding to the first portion, the position of the shear center of the fan blade can be adjusted by the reinforcing plate 30 and the counterweight block 40, thereby improving the stability of the overall structure.

[0051] In this embodiment, the reinforcing plate 30 is supported inside the inner cavity 110, and the reinforcing plate 30 is vertically placed in the inner cavity 110. The reinforcing plate 30 can be used to provide an installation position for the counterweight block 40, which is conducive to adjusting the position of the shear center of the fan blade through the structure of the counterweight block 40 and the reinforcing plate 30. Among them, the counterweight block 40 can be a structural block made of metal.

[0052] In this embodiment, one or more reinforcing plates 30 are provided, and each reinforcing plate 30 is provided with one or more counterweight blocks 40. When a plurality of counterweight blocks 40 are provided on a reinforcing plate 30, the plurality of counterweight blocks 40 are spaced apart along the length and width directions of the reinforcing plate 30, which is conducive to adjusting the arrangement of the counterweights to ensure the stability of the overall structure.

[0053] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0054] The ply structure of the fan blade of the present application adopts a first part along the width direction that is heavier than the second part, so as to realize the setting of the shear center toward the leading edge end 120. The structural setting of the first part and the second part using different weights is beneficial to realize the adjustment of the shear center through the setting of the ply structure, thereby improving the stability of the fan blade to ensure the long-term stable operation of the fan blade.

[0055] In order to improve the strength of the fan blades, the present application can adjust the shear center of the blades so that the shear center of the blades is close to the leading edge 120 and also close to the aerodynamic center of the fan blades, thereby improving the strength of the fan blades. The fan blades are not easily deformed by force, which is beneficial to achieving the purpose of load reduction and improving the air-elastic coupling effect. It is also beneficial to achieve the stability of the fan blades during long-term outdoor work.

[0056] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fan blade, characterized in that: include: A fan blade body (10), wherein the fan blade body (10) has an inner cavity (110), and the fan blade body (10) forms a leading edge end (120) and a trailing edge end (130) along a width direction; A ply structure, wherein the ply structure is arranged on the outer surface of the wind blade body (10), the ply structure comprises a first part and a second part arranged along the width of the wind blade body (10), the first part and the second part are located on both sides of the plane where the shear center of the wind blade body (10) is located, and the weight of the first part is greater than the weight of the second part.

2. The fan blade according to claim 1, characterized in that: The material density of the first portion is greater than the material density of the second portion.

3. The fan blade according to claim 1, characterized in that: The first portion and the second portion are made of the same material, and a laying thickness of the first portion is greater than a laying thickness of the second portion.

4. The fan blade according to claim 1, characterized in that: The first part and the second part are made of the same material, and along the length direction of the wind blade body (10), the laying length of the first part is greater than the laying length of the second part.

5. The fan blade according to any one of claims 1 to 4, characterized in that: The fan blades also include: A structural component (20), wherein the structural component (20) is arranged on the inner surface of the fan blade body (10), and the structural component (20) is arranged corresponding to the first part.

6. The fan blade according to claim 5, characterized in that: Along the thickness direction of the fan blade, at least one of the upper surface and the lower surface of the inner cavity (110) that are arranged opposite to each other has the structural component (20).

7. The fan blade according to claim 6, characterized in that: The structural components (20) are arranged on both the upper surface and the lower surface, and the structural components (20) on the upper surface and the lower surface are arranged symmetrically.

8. The fan blade according to claim 5, characterized in that: The structural member (20) is made of cloth; and / or The structural member (20) is a coating.

9. The fan blade according to any one of claims 1 to 4, characterized in that: The fan blades also include: A reinforcing plate (30), the reinforcing plate (30) being arranged in the inner cavity (110), and being arranged between the shear center and the leading edge end (120) along the width direction of the fan blade body (10); A counterweight block (40), wherein the counterweight block (40) is arranged on the reinforcing plate (30).

10. A fan, characterized in that: The invention comprises the fan blade according to any one of claims 1 to 9.

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