Self-adaptive deformation trailing edge shell for wind power blade

Abstract

The utility model relates to the technical field of wind power blades, in particular to a self-adaptive deformation trailing edge shell for a wind power blade, which comprises trailing edge supports, trailing edge support frames are arranged in the trailing edge supports, the trailing edge support frames and the trailing edge supports are integrally formed, a connecting plate is arranged between the two groups of trailing edge supports, and the connecting plate is connected with the trailing edge supports. A reinforcing skin is arranged on the upper portion of the connecting plate, positioning holes are formed in the connecting plate, connecting screws penetrate through the positioning holes, and the reinforcing skin comprises an anti-corrosion coating, a waterproof layer, a reinforcing layer, a base layer and a bonding layer which are sequentially distributed from top to bottom. The connecting screws are additionally arranged at the connecting positions of the rear edge support, the rear edge beam and the front edge shell, mutual connection among the rear edge support, the rear edge beam and the front edge shell can be facilitated, the reinforcing skin with the waterproof and anti-corrosion structure is arranged at the tops of the connecting screws, the connecting positions can be completely wrapped, and the bonding strength of the connecting positions is further improved. And the joint is prevented from being broken due to corrosion.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine blades, in particular to an adaptively deformable trailing edge shell for wind turbine blades. Background Art

[0002] The trailing edge of the fan blade refers to the rear edge of the fan blade, including the curved area and tail structure of the blade. When the fan is running, the trailing edge of the blade faces the airflow, generating resistance and thrust, thereby driving the rotation of the fan.

[0003] The patent specification with announcement number CN220302247U discloses an adaptive deformation trailing edge shell for wind turbine blades and a wind turbine blade, the trailing edge shell includes a trailing edge support structure, a flexible skin and a trailing edge beam, the trailing edge support structure is fixedly bonded to the trailing edge beam as the skeleton of the trailing edge shell, the flexible skin is laid on the pressure surface and suction surface of the trailing edge support structure, and is fixedly bonded to the trailing edge support structure. The utility model can effectively reduce the weight and cost of the blade, and can change the shape according to the wind speed, thereby changing the aerodynamic characteristics of the blade, and then controlling the energy output of the blade.

[0004] However, in the implementation of relevant technologies, it was found that the above-designed adaptive deformable trailing edge shell for wind turbine blades and wind turbine blades have the following problems: since the trailing edge support structure is only connected to other frames or trailing edge beams by bonding at the connection, the strength of the connection is weak and it is easy to cause the blade to crack. In view of this, an adaptive deformable trailing edge shell for wind turbine blades is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an adaptively deformable trailing edge shell for a wind turbine blade.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an adaptively deformable trailing edge shell for a wind turbine blade, comprising a trailing edge bracket, a trailing edge support frame is arranged inside the trailing edge bracket, and the trailing edge support frame and the trailing edge bracket are integrally formed, a connecting plate is arranged between two groups of the trailing edge brackets, and plug-in blocks are fixedly arranged at both front and rear ends of the connecting plate, a plug-in groove is provided at the connection between the plug-in block and the trailing edge bracket, a reinforcing skin is arranged above the connecting plate, and a positioning hole is arranged inside the connecting plate, and a connecting screw is passed through the inside of the positioning hole, the reinforcing skin comprises an anti-corrosion coating, a waterproof layer, a reinforcing layer, a base layer and an adhesive layer distributed in sequence from top to bottom, the width of the adhesively reinforced skin is greater than the width of the connecting plate, the connecting plate is connected to other components by connecting screws, thereby increasing the connection strength, and at the same time, the reinforcing skin is pasted above the connection to completely wrap the connection, thereby further improving the bonding strength of the connection.

[0007] As a further description of the above technical solution: the waterproof layer is epoxy resin, the reinforcement layer is nylon fiber, the waterproof layer and the anti-corrosion coating can improve the overall waterproof and anti-corrosion performance of the reinforced skin and prevent the connection from breaking due to corrosion.

[0008] As a further description of the above technical solution: the base layer is glass fiber, and the reinforced skin is fixed to the connecting plate by an adhesive layer. The base layer made of glass fiber has strong strength and is not easy to break, and a reinforcement layer is added to the base layer to further improve the toughness of the reinforced skin.

[0009] As a further description of the above technical solution: a leading edge shell is arranged on the left side of the trailing edge bracket, and a trailing edge beam is arranged on the right side of the trailing edge bracket, and the trailing edge bracket is used to connect the leading edge shell and the trailing edge beam.

[0010] As a further description of the above technical solution: the trailing edge beam and the leading edge shell are both fixedly connected to the connecting plate by connecting screws, and the connecting screws can facilitate the connection between the connecting plate and the trailing edge beam and the leading edge shell.

[0011] As a further description of the above technical solution: the reinforced skin covers the top of the connecting screws, the reinforced skin is fixedly bonded to the trailing edge beam and the leading edge shell, and the reinforced skin completely covers the connecting screws, which can protect the tops of the connecting screws.

[0012] As a further description of the above technical solution: flexible skins are bonded to the upper and lower sides of the trailing edge bracket, and the flexible skins and the trailing edge bracket constitute a trailing edge shell.

[0013] The utility model has the following beneficial effects:

[0014] The utility model designs an adaptively deformable trailing edge shell for a wind turbine blade. By adding connecting screws at the connection between the trailing edge bracket, the trailing edge beam and the leading edge shell, the three can be conveniently connected to each other. A reinforced skin with a waterproof and anti-corrosion structure is provided on the top of the connecting screws, which can completely wrap the connection, further improve the bonding strength of the connection, and prevent the connection from breaking due to corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model when installed;

[0016] Figure 2 It is a structural schematic diagram of the rear edge bracket of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the reinforced skin of the utility model;

[0018] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0019] Legend:

[0020] 1. Trailing edge bracket; 2. Trailing edge support frame; 3. Connecting plate; 4. Leading edge shell; 5. Flexible skin; 6. Reinforced skin; 601. Anti-corrosion coating; 602. Waterproof layer; 603. Reinforcement layer; 604. Base layer; 605. Adhesive layer; 7. Trailing edge beam; 8. Connecting screws; 9. Positioning hole; 10. Plug-in block; 11. Plug-in slot. DETAILED DESCRIPTION

[0021] Reference Figure 1-4 The utility model provides an adaptive deformation trailing edge shell for a wind turbine blade: it includes a trailing edge bracket 1, a trailing edge support frame 2 is arranged inside the trailing edge bracket 1, and the trailing edge support frame 2 and the trailing edge bracket 1 are integrally formed, a connecting plate 3 is arranged between the two groups of trailing edge brackets 1, and plug-in blocks 10 are fixedly arranged at both front and rear ends of the connecting plate 3, a plug-in groove 11 is provided at the connection between the plug-in block 10 and the trailing edge bracket 1, a reinforcing skin 6 is arranged above the connecting plate 3, and a positioning hole 9 is opened inside the connecting plate 3, and a connecting screw 8 is penetrated inside the positioning hole 9, the reinforcing skin 6 includes an anti-corrosion coating 601, a waterproof layer 602, a reinforcing layer 603, a base layer 604 and an adhesive layer 605 distributed from top to bottom in sequence, the width of the bonded reinforcing skin 6 is greater than the width of the connecting plate 3, the connecting plate 3 is connected to other components by the connecting screws 8, the connection strength is increased, and the reinforcing skin 6 is pasted above the connection to completely wrap the connection, thereby further improving the bonding strength of the connection.

[0022] As a further implementation scheme of the above technical scheme: the waterproof layer 602 is epoxy resin, the reinforcement layer 603 is nylon fiber, the waterproof layer 602 and the anti-corrosion coating 601 can improve the overall waterproof and anti-corrosion performance of the reinforced skin 6, and prevent the connection from breaking due to corrosion.

[0023] As a further implementation scheme of the above technical scheme: the base layer 604 is glass fiber, and the reinforced skin 6 is fixed to the connecting plate 3 by an adhesive layer 605. The base layer 604 made of glass fiber has strong strength and is not easy to break, and a reinforcing layer 603 is added to the base layer 604 to further improve the toughness of the reinforced skin 6.

[0024] As a further implementation scheme of the above technical scheme: a leading edge shell 4 is arranged on the left side of the trailing edge bracket 1 , and a trailing edge beam 7 is arranged on the right side of the trailing edge bracket 1 , and the trailing edge bracket 1 is used to connect the leading edge shell 4 and the trailing edge beam 7 .

[0025] As a further implementation scheme of the above technical scheme: the trailing edge beam 7 and the leading edge shell 4 are both fixedly connected to the connecting plate 3 by connecting screws 8, and the connecting screws 8 can facilitate the connection between the connecting plate 3 and the trailing edge beam 7 and the leading edge shell 4.

[0026] As a further implementation scheme of the above technical scheme: the reinforced skin 6 covers the top of the connecting screws 8, the reinforced skin 6 is fixedly bonded to the trailing edge beam 7 and the leading edge shell 4, and the reinforced skin 6 completely covers the connecting screws 8, which can protect the top of the connecting screws 8.

[0027] As a further implementation scheme of the above technical scheme: flexible skins 5 are bonded to both the upper and lower sides of the trailing edge bracket 1, and the flexible skins 5 and the trailing edge bracket 1 constitute a trailing edge shell.

[0028] The utility model has the following beneficial effects:

[0029] The utility model designs an adaptively deformable trailing edge shell for a wind turbine blade. By adding connecting screws 8 at the connection between the trailing edge bracket 1, the trailing edge beam 7 and the leading edge shell 4, the three can be conveniently connected to each other, and a reinforced skin 6 with a waterproof and anti-corrosion structure is provided on the top of the connecting screws 8, which can completely wrap the connection, further improve the bonding strength of the connection, and prevent the connection from breaking due to corrosion.

[0030] During specific implementation, the trailing edge bracket 1 is plugged into the front and rear ends of the connecting plate 3, the plug-in block 10 on the connecting plate 3 is inserted into the plug-in slot 11 and fixed and bonded at the connection point by glue, and the flexible skin 5 is pasted on the upper and lower sides of the trailing edge bracket 1, and then the leading edge shell 4 is installed on one side of the trailing edge bracket 1, and the trailing edge beam 7 is installed on the other side. During installation, several groups of connecting screws 8 are passed through the positioning holes 9 and are threadedly connected to the leading edge shell 4 or the trailing edge beam 7 respectively, and finally the reinforced skin 6 is pasted on the top of the connecting plate 3, and a part of the reinforced skin 6 is pasted on the connecting plate 3 and the trailing edge bracket 1, and the other part is pasted on the leading edge shell 4 or the trailing edge beam 7. The waterproof layer 602 and the anti-corrosion coating 601 can improve the overall waterproof and anti-corrosion performance of the reinforced skin 6 and prevent the connection from breaking due to corrosion, and the reinforcing layer 603 added on the base layer 604 further improves the toughness of the reinforced skin 6.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptively deformable trailing edge shell for a wind turbine blade, comprising a trailing edge bracket (1), wherein a trailing edge support frame (2) is arranged inside the trailing edge bracket (1), and the trailing edge support frame (2) and the trailing edge bracket (1) are integrally formed, a connecting plate (3) is arranged between two groups of the trailing edge brackets (1), and plug-in blocks (10) are fixedly arranged at both front and rear ends of the connecting plate (3), and a plug-in slot (11) is provided at the connection between the plug-in block (10) and the trailing edge bracket (1), characterized in that: A reinforcing skin (6) is arranged above the connecting plate (3), and a positioning hole (9) is opened inside the connecting plate (3), and a connecting screw (8) is inserted inside the positioning hole (9). The reinforcing skin (6) comprises an anti-corrosion coating (601), a waterproof layer (602), a reinforcing layer (603), a base layer (604) and an adhesive layer (605) which are arranged in sequence from top to bottom, and the width of the adhesive reinforcing skin (6) is greater than the width of the connecting plate (3).

2. The adaptively deformable trailing edge shell for a wind turbine blade according to claim 1, characterized in that: The waterproof layer (602) is epoxy resin, and the reinforcement layer (603) is nylon fiber.

3. The adaptive deformation trailing edge shell for a wind turbine blade according to claim 2, characterized in that: The base layer (604) is glass fiber, and the reinforced skin (6) is fixed to the connecting plate (3) via an adhesive layer (605).

4. The adaptive deformation trailing edge shell for a wind turbine blade according to claim 3, characterized in that: A leading edge shell (4) is arranged on the left side of the trailing edge bracket (1), and a trailing edge beam (7) is arranged on the right side of the trailing edge bracket (1).

5. The adaptively deformable trailing edge shell for a wind turbine blade according to claim 4, characterized in that: The trailing edge beam (7) and the leading edge shell (4) are both fixedly connected to the connecting plate (3) via connecting screws (8).

6. The adaptively deformable trailing edge shell for a wind turbine blade according to claim 5, characterized in that: The reinforced skin (6) covers the top of the connecting screws (8), and the reinforced skin (6) is fixedly bonded to the trailing edge beam (7) and the leading edge shell (4).

7. The adaptively deformable trailing edge shell for a wind turbine blade according to claim 1, characterized in that: Flexible skins (5) are bonded to both the upper and lower sides of the trailing edge bracket (1).

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