Extended winglet and wind driven generator blade

Abstract

The utility model provides an extended winglet, relates to the technical field of wind power equipment, and solves the technical problems that an extended winglet in the prior art is generally composed of a suction surface and a pressure surface, is internally of a cavity structure, and is easy to deform or damage when bearing a wind load. The lengthened winglet comprises a suction plate and a pressure plate, and the suction plate and the pressure plate are bonded to form a wing body of a cavity structure. One end of the wing body is sealed, and the other end of the wing body is open; the web plate mechanism is arranged in the cavity structure of the wing body, the length direction of the web plate mechanism extends in the length direction of the wing body, and the web plate mechanism is connected with the suction plate and the pressure plate to play a supporting role. A web mechanism is arranged in a cavity structure of a wing body, extends in the length direction of the wing body and is connected with a suction plate and a pressure plate. The suction plate and the pressure plate can be effectively connected through the web plate mechanism, and therefore the overall structural strength of the winglet is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, and in particular to an extended winglet and a wind turbine blade. Background Technology

[0002] Wind turbine blades are one of the core components of a wind power generation system. Their main function is to convert wind energy into mechanical energy, which then drives a generator to produce electricity. The performance of the blades directly determines the power generation efficiency and economics of the wind turbine. With the development of wind power generation technology, the demand for wind turbine power and electricity generation is constantly increasing. Traditional blade designs are gradually showing limitations in terms of length and structural strength, making it difficult to meet the higher power generation demands.

[0003] To improve the power generation efficiency of wind turbines, the industry commonly uses the method of increasing the swept area of ​​the blades to improve the wind energy utilization coefficient. Specifically, by adding extended winglets to the blade tips, the swept area of ​​the blades can be effectively increased, thereby improving the lift-to-drag ratio and wind energy capture capability. This design not only expands the effective working range of the blades but also significantly improves the overall performance of the wind turbine.

[0004] However, to ensure its lightweight nature and avoid increasing the burden on the wind turbine blades, the current extended winglets are usually composed of a suction surface and a pressure surface, with an internal cavity structure.

[0005] Due to the lack of effective reinforcement measures, the winglets are prone to deformation or damage when subjected to wind loads.

[0006] Therefore, there is an urgent need for a solution that can improve the overall strength of the extended winglet in order to overcome the shortcomings of the existing technology. Utility Model Content

[0007] The purpose of this invention is to provide an extended winglet to solve the technical problem in the prior art where extended winglets typically consist of a suction surface and a pressure surface, with an internal cavity structure, making them prone to deformation or damage under wind loads. The preferred technical solutions among the various technical solutions provided by this invention and their numerous technical effects are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] An extended winglet includes:

[0010] A suction plate and a pressure plate are bonded together to form a small wing with a cavity structure; one end of the wing is sealed and the other end is open for fitting onto the end of a wind turbine blade.

[0011] The web plate mechanism is located inside the cavity structure of the wing body, and its length extends along the length of the wing body. It is connected to the suction plate and the pressure plate respectively to provide support.

[0012] Furthermore, the web plate mechanism includes a support plate and two oppositely arranged connecting plates. The support plate is fixedly connected to the opposite sides of the two connecting plates to form an I-shape. The two connecting plates are respectively fixedly connected to the inner walls of the suction plate and the pressure plate.

[0013] Furthermore, the support plate is made of PV material with a thickness between 10-15mm.

[0014] Furthermore, the web plate mechanism also includes bidirectional fabric pasted on two opposite longitudinal sides of the support plate, and the bidirectional fabric is provided in at least one layer.

[0015] Furthermore, the support plate has two layers of bidirectional fabric bonded on each side.

[0016] Furthermore, the web plate mechanism also includes an adhesive ring, which is disposed on the inner wall of the connection end between the wing body and the generator blade, and is bonded between the generator blade and the inner wall of the wing body.

[0017] Furthermore, the adhesive ring is connected to the end of the generator blade, and the adhesive ring seals the cavity formed between the end of the generator blade and the inner wall of the wing body when they are connected.

[0018] Furthermore, the web plate mechanism also includes an adhesive angle set along the gap formed by the adhesion of the suction plate and the pressure plate, the shape of which matches the geometry of the leading edge, trailing edge and end of the winglet.

[0019] A wind turbine blade includes an extended winglet as described in any one of the claims, wherein the open end of the winglet is sleeved at the blade tip, and the end of the winglet is glued to the blade.

[0020] Furthermore, the suction plate of the wing body is bonded to the suction surface of the generator blade, and the pressure plate of the wing body is bonded to the pressure surface.

[0021] This utility model provides an extended winglet and a wind turbine blade, effectively solving the technical problem in the prior art where extended winglets typically consist of suction and pressure surfaces with a hollow internal structure, making them prone to deformation or damage under wind loads. It also significantly improves the structural strength of the extended winglet. The specific technical effects achieved are as follows:

[0022] Improve structural strength

[0023] In this invention, a web plate mechanism is provided inside the cavity structure of the wing body, and the web plate mechanism extends along the length of the wing body and connects with the suction plate and the pressure plate. The web plate mechanism can effectively connect the suction plate and the pressure plate, and can share part of the force when the winglet is subjected to wind load.

[0024] Traditional winglets have only a cavity structure consisting of suction and pressure plates, which are prone to deformation or damage under wind loads. The addition of a web plate mechanism is equivalent to building a supporting frame inside the cavity. When wind loads are applied to the winglet, the web plate mechanism can prevent the suction and pressure plates from collapsing inward or undergoing other forms of deformation, thereby greatly improving the overall structural strength of the winglet.

[0025] Improve wind load resistance

[0026] Wind load is a significant factor affecting the performance of extended winglets. The presence of the web structure enhances the winglet's ability to resist wind load.

[0027] When wind forces act on the winglet surface, the web mechanism distributes the wind load evenly across the entire winglet structure, preventing localized stress concentration. For example, without a web mechanism, the wind load might concentrate primarily on certain weak points in the suction or pressure plates, causing these areas to fail first. With a web mechanism, the wind load is guided and dispersed over a larger area, allowing the winglet to operate normally under higher wind speeds and improving its wind resistance.

[0028] Ensure lightweight design

[0029] Although a web plate mechanism is added, the design still maintains the lightweight characteristics of the winglet. This is because the web plate mechanism is simply a reasonable layout and installation within the cavity, and does not significantly increase the overall weight of the winglet.

[0030] Lightweight design is a crucial principle in wind turbine blade design. Excessively heavy winglets increase the load on the turbine blades, impacting the overall efficiency of the wind power system. This invention addresses the issue of winglet deformation or damage without compromising lightweight design principles, ensuring the winglets possess sufficient strength without placing additional strain on the turbine blades.

[0031] Improve the overall performance of wind turbines

[0032] As a crucial component of wind turbine blades, the performance of the winglet directly impacts the overall performance of the wind turbine unit. By employing the extended winglet provided by this invention, its structural strength and wind load resistance are enhanced, enabling the winglet to operate more stably in practical applications.

[0033] More stable, extended winglets can better fulfill their functions of increasing blade swept area, improving lift-to-drag ratio, and enhancing wind energy capture capability. This helps improve the power generation efficiency of wind turbines, meeting the ever-evolving demands for higher power generation from wind power technology, thereby improving the overall performance of wind turbines.

[0034] In summary, this invention effectively solves the problem of easy deformation or damage of extended winglets in the prior art by setting a web plate mechanism inside the cavity structure of the extended winglet. This solution not only significantly improves the overall structural strength and wind load resistance of the winglet, but also ensures the lightweight design of the winglet, ultimately improving the overall performance of the wind turbine and providing strong support for the development of wind power generation technology. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the connection between the airfoil and the wind turbine blades provided in an embodiment of the present invention;

[0037] Figure 2 This is an internal schematic diagram of the connection between the airfoil and the wind turbine blades provided in an embodiment of this utility model;

[0038] Figure 3 This is a schematic diagram of the adhesive ring structure provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of a portion of the web plate mechanism provided in an embodiment of this utility model.

[0040] Explanation of reference numerals in the attached drawings: 100, airfoil; 110, suction plate; 120, pressure plate; 200, blade; 300, web plate mechanism; 310, adhesive ring; 320, connecting plate; 330, support plate; 340, bidirectional fabric. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] The following is in conjunction with the appendix Figure 1-4 To further illustrate this application, embodiments of this application disclose an extended winglet and a wind turbine blade.

[0045] Example 1

[0046] Reference Figure 1 and Figure 2 As shown, an extended winglet includes a wing body 100 and a web mechanism 300.

[0047] The wing 100 consists of a suction plate 110 and a pressure plate 120. The suction plate 110 and the pressure plate 120 are manufactured using a winglet mold and fixed together in the workshop by bonding, thus forming a cavity structure. One end of the wing 100 is designed to be sealed, which effectively prevents external impurities from entering the cavity and protects the internal structure; while the other end of the wing 100 is open, which is used to fit onto the end of the wind turbine blade 200 for a fixed connection. This design makes the connection between the winglet and the wind turbine blade 200 more convenient and reliable.

[0048] The web plate mechanism 300 is disposed inside the cavity structure of the wing body 100 and connects the suction plate 110 and the pressure plate 120 respectively. The introduction of the web plate mechanism 300 is one of the key improvements of this utility model, which can significantly improve the overall structural strength of the wing body 100. Specifically, the web plate mechanism 300 plays a supporting and reinforcing role between the suction plate 110 and the pressure plate 120, effectively preventing the wing body 100 from deforming or being damaged when subjected to external loads such as wind loads, and greatly improving the wind load resistance of the extended winglet. At the same time, since the web plate mechanism 300 is cleverly disposed inside the cavity, it makes full use of the internal space of the wing body 100 and avoids the problem of increased weight caused by adding an extra external structure, thereby ensuring the lightweight design of the extended winglet, which is of great significance for improving the overall performance of the wind turbine.

[0049] Reference Figure 2 and Figure 4 As shown, the web plate mechanism 300 includes a support plate 330 and two connecting plates 320, which correspond to the suction plate 110 and the pressure plate 120, respectively. The length and width sides of the two connecting plates 320 are arranged opposite each other. The length of the two connecting plates 320 extends along the length of the wing body 100, and the length and width sides of the two connecting plates 320 are fixedly connected to the inner wall of the corresponding suction plate 110 or pressure plate 120. This design ensures that the web plate mechanism 300 is stably installed within the wing body 100, forming a stable connection between the connecting plates 320 and the suction plate 110 and pressure plate 120, thereby improving the overall stability of the wing body 100 structure.

[0050] The support plate 330 is fixedly connected between two connecting plates 320, and the thick sidewalls of the support plate 330 are used for the opposite sides of the two connecting plates 320. The support plate 330 is made of PVC material, which has good corrosion resistance, aging resistance and a certain degree of flexibility. This allows the support plate 330 to maintain stable performance in complex environments. At the same time, its flexibility helps to undergo appropriate deformation when subjected to certain external forces to buffer stress and avoid brittleness due to excessive rigidity.

[0051] Furthermore, the thickness of the support plate 330 is between 10 and 15 mm. In this embodiment, the thickness of the support plate 330 is preferably 13 mm. This thickness range takes into account both strength and weight factors, ensuring that the support plate 330 has sufficient strength to withstand the forces from the connecting plate 320 and other components, while avoiding excessive thickness that would make the overall structure too bulky and affect the lightweight design of the extended winglet.

[0052] In addition, the web plate mechanism 300 also includes at least one layer of bidirectional fabric 340 laid and bonded to the sides of the support plate 330. In this example, two layers of bidirectional fabric 340 are preferably laid on both sides of the support plate 330, and the bidirectional fabric 340 is made of fiberglass cloth. Fiberglass cloth has the characteristics of high strength and high modulus. Laying and bonding it to the sidewalls of the support plate 330 can further enhance the strength and stiffness of the support plate 330. Since the bidirectional fabric 340 has fibers distributed in both directions, it can effectively resist stress from different directions, thereby improving the overall deformation resistance of the web plate mechanism 300. This is of great significance for maintaining the shape stability and structural integrity of the extended winglet.

[0053] Reference Figure 2 and Figure 3 As shown, the web plate mechanism 300 also includes an adhesive ring 310, which is fixedly connected to the inner wall of the cavity structure of the wing body 100 and is disposed at one end of the wing body 100 that is open.

[0054] When the airfoil 100 is connected to the wind turbine blade 200, the wind turbine blade 200 can be inserted into the cavity structure of the airfoil 100 from the open end of the airfoil 100. After insertion, adhesive is filled into the gap between the inner wall of the airfoil 100 and the wind turbine blade 200 to achieve a fixed connection between the airfoil 100 and the wind turbine.

[0055] During this process, due to the presence of the adhesive ring 310, when the wind turbine blade 200 is inserted into the cavity structure of the airfoil 100, the tip of the blade 200 can just abut against the center of the adhesive ring 310. In this way, the adhesive ring 310 can wrap around the outer side of the tip of the wind turbine blade 200 in a ring shape and be precisely positioned between the wind turbine blade 200 and the inner wall of the airfoil 100. This structural arrangement greatly improves the connection performance between the two.

[0056] During use, the fan blades 200 will generate large centrifugal forces and vibrations when rotating. The adhesive ring 310, after being positioned in the above manner, can effectively enhance the stability of the connection and prevent the airfoil 100 from vibrating due to the rotation of the fan blades 200. This is crucial for ensuring the overall smoothness and safety of the fan operation.

[0057] Meanwhile, the adhesive ring 310 also serves to prevent the adhesive from flowing between the fan blade 200 and the airfoil 100. During the adhesive filling process, without the obstruction of the adhesive ring 310, the adhesive might flow irregularly, resulting in uneven distribution and affecting the bonding effect. The adhesive ring 310 effectively limits the flow range of the adhesive, ensuring that it fills and cures only within the predetermined area, thereby improving the quality and reliability of the bond.

[0058] The web structure 300 also includes an adhesive angle formed along the gap created by the bonding of the suction plate 110 and the pressure plate 120. This adhesive angle is made of fiberglass cloth, and its shape matches the geometry of the leading edge, trailing edge, and end of the winglet. Furthermore, the inner adhesive angle is located inside the cavity structure of the wing body 100 and is set in an arc-shaped transition.

[0059] The bonding angles of the fiberglass cloth enhance the strength and stability of the connection between the suction plate 110 and the pressure plate 120. The high strength, good heat resistance, and corrosion resistance of the fiberglass cloth used at the bonding angles effectively prevent cracking or separation of the connection due to external environmental factors (such as temperature changes and humidity) or internal stress during long-term use, thus extending the service life of the entire web plate mechanism 300.

[0060] The shape of the bonding angle matches the geometry of the leading edge, trailing edge, and end of the winglet, allowing the bonding angle to better fit the various parts of the winglet and ensuring a more uniform stress distribution throughout the connection area. When the web mechanism 300 is subjected to various loads during operation, the uniform stress distribution helps to avoid local stress concentration, thereby improving the overall reliability and load-bearing capacity of the web mechanism 300.

[0061] Furthermore, the rounded transition of the bonding angle within the cavity structure of the airfoil 100 further optimizes stress distribution, as the rounded structure disperses stress more effectively than sharp angles. Inside the cavity structure of the airfoil 100, this design helps reduce the risk of structural damage due to stress concentration, while also improving the smoothness of fluid flow (such as air or other media) within the cavity, reducing flow resistance or turbulence caused by structural abrupt changes, thereby enhancing the overall performance of the web mechanism 300.

[0062] Example 2

[0063] Reference Figure 1 and Figure 2 As shown, a wind turbine blade includes a blade 200 and an airfoil 100. The blade 200 is inserted into the cavity structure of the airfoil 100 from its open end. Due to precise design considerations, the blade 200 is ensured to accurately enter the cavity structure of the airfoil 100. This insertion design brings many technical benefits, such as greatly simplifying the assembly process of the wind turbine blade 200. Compared to traditional integral casting or complex welding methods, this method does not require high-precision alignment equipment or special processes such as high-temperature welding, thereby reducing energy consumption and costs in the production process.

[0064] After the wind turbine blade 200 is inserted into the airfoil 100, a certain gap will be formed between the inner wall of the airfoil 100 and the wind turbine blade 200. At this time, an adhesive is used to fill the gap for a fixed connection. The use of this adhesive not only achieves a strong connection, but also has a certain degree of flexibility, which can absorb some vibration energy during the operation of the wind turbine blade 200, reduce the relative vibration between the wind turbine blade 200 and the airfoil 100, and improve the service life of the entire wind turbine blade 200.

[0065] Furthermore, the suction plate 110 of the wing 100 is bonded to the suction surface of the generator blade 200, and the pressure plate 120 of the wing 100 is also bonded to the pressure surface of the generator blade 200. This bonding method has significant technical advantages. On the one hand, bonding allows for a larger contact area, which, compared to mechanical connections such as bolts, can distribute stress more evenly and avoid fatigue damage caused by localized stress concentration. On the other hand, bonding helps maintain the smoothness of the wind turbine blade 200 surface, reducing air resistance and improving the working efficiency of the wind turbine blade 200. Simultaneously, this bonding method facilitates later maintenance; when a component is damaged, it can be easily disassembled and replaced without significantly affecting other components.

[0066] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An extended winglet, characterized in that, include: A suction plate (110) and a pressure plate (120) are bonded together to form a wing body (100) with a cavity structure; one end of the wing body (100) is sealed and the other end is open for fitting onto the end of a wind turbine blade (200); The web plate mechanism (300) is located inside the cavity structure of the wing body (100), and the length direction of the web plate mechanism (300) extends along the length direction of the wing body (100), and is connected to the suction plate (110) and the pressure plate (120) respectively to provide support.

2. The extended winglet according to claim 1, characterized in that, The web plate mechanism (300) includes a support plate (330) and two oppositely arranged connecting plates (320). The support plate (330) is fixedly connected to the opposite sides of the two connecting plates (320) to form an I-shape. The two connecting plates (320) are respectively fixedly connected to the inner walls of the suction plate (110) and the pressure plate (120).

3. An extended winglet according to claim 2, characterized in that, The support plate (330) is made of PV material with a thickness between 10-15mm.

4. An extended winglet according to claim 2, characterized in that, The web plate mechanism (300) also includes a bidirectional fabric (340) pasted on two opposite longitudinal side surfaces of the support plate (330), and the bidirectional fabric (340) is provided with at least one layer.

5. An extended winglet according to claim 4, characterized in that, The support plate (330) has two layers of bidirectional fabric (340) bonded on each side.

6. An extended winglet according to claim 1, characterized in that, The web plate mechanism (300) further includes an adhesive ring (310), which is disposed on the inner wall of the connection end between the airfoil (100) and the generator blade (200), and is bonded between the generator blade (200) and the inner wall of the airfoil (100).

7. An extended winglet according to claim 6, characterized in that, The adhesive ring (310) is connected to the end of the generator blade (200), and the adhesive ring (310) seals the cavity formed between the end of the generator blade (200) and the inner wall of the airfoil (100) when they are connected.

8. An extended winglet according to claim 1, characterized in that, The web plate mechanism (300) also includes an adhesive angle provided along the gap formed by the adhesion of the suction plate (110) and the pressure plate (120), the shape of which matches the geometry of the leading edge, trailing edge and end of the winglet.

9. A wind turbine blade (200), characterized in that, Includes an extended winglet as described in any one of claims 1 to 8, wherein the open end of the wing body (100) is fitted onto the tip of the blade (200), and the end of the wing body (100) is glued to the blade (200).

10. A wind turbine blade (200) according to claim 9, characterized in that, The suction plate (110) of the wing body (100) is bonded to the suction surface of the generator blade (200), and the pressure plate (120) of the wing body (100) is bonded to the pressure surface.

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