Wind power blade tip drainage hole rubber blocking plate

Abstract

The utility model belongs to the technical field of wind power blades, and particularly discloses a wind power blade tip drainage hole rubber blocking plate which comprises a main body structure, non-porous isolating membranes, demolding cloth and double-shaft cloth, the main body structure is of a triangular prism structure, the non-porous isolating membranes cover the two bottom faces of the main body structure and the two adjacent sides in the height direction, and the demolding cloth is arranged on the two bottom faces of the main body structure. The height side corresponding to the shortest side of the bottom side of the main body structure is not covered; the demolding cloth covers the non-porous isolating membrane and covers the two adjacent sides of the main body structure in the height direction; the biaxial cloth wraps the outer side of the demolding cloth after being infiltrated by epoxy resin and covers the two adjacent sides of the main body structure in the height direction; and after curing, demolding is conducted to form an initial body of the rubber baffle, and the initial body of the rubber baffle is cut according to the molded surface of a mold to form a finished product of the rubber baffle. And the problem that the running stability of the blade is damaged due to the fact that residual glue falls off to block the drainage holes and break down a blade root cover plate in the later blade running process can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine blade technology, and in particular relates to a baffle plate for the drainage hole of a wind turbine blade tip. Background Technology

[0002] Wind turbine blades are the core components of wind turbine generators, converting natural wind energy into electrical energy. They are a primary indicator of a wind turbine's design and technological level. The working principle of wind turbine blades is to utilize wind energy, generating mechanical energy through blade rotation, and ultimately converting that mechanical energy into electrical energy. During the manufacturing process of wind turbine blades, particularly in the mold-fitting and bonding process, the blade tip area often suffers from residual adhesive. This adhesive residue, after the blade is installed and in operation, becomes a key focus of after-sales maintenance as the years pass. This residual adhesive not only generates noise but also damages the entire turbine. Because the blade tip has drainage holes, small amounts of residual adhesive can clog these holes, preventing water from draining from the blade and affecting the center of gravity and torque during operation. Larger amounts of residual adhesive can damage the blade as it rotates, even breaking the blade root cover and causing fatal damage to the entire turbine. Therefore, controlling the amount of residual glue extruded from the mold and avoiding blockage of the blade tip drainage holes are key factors in ensuring the long-term stability and safety of wind turbine blades. Utility Model Content

[0003] The purpose of this utility model is to provide a baffle plate for the drainage hole of a wind turbine blade, so as to solve the problem of damage to the blade stability caused by residual glue falling off and blocking the drainage hole, and puncturing the blade root cover plate during the operation of the blade.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a wind turbine blade tip drainage hole baffle plate, comprising a main structure, a non-porous isolation membrane, a release cloth, and a biaxial cloth. The main structure is a triangular prism structure. The non-porous isolation membrane covers the two bottom surfaces and adjacent sides in the height direction of the main structure, and the height side corresponding to the side with the shortest bottom edge of the main structure is not covered. The release cloth covers the outside of the non-porous isolation membrane and covers the adjacent sides in the height direction of the main structure. The biaxial cloth is impregnated with epoxy resin and wrapped around the outside of the release cloth, covering the adjacent sides in the height direction of the main structure. After curing, the baffle plate is demolded to form a preliminary baffle plate body. The preliminary baffle plate body is cut according to the mold surface to form the finished baffle plate body.

[0005] Furthermore, the finished baffle plate is bonded to the windward side of the blade shell using a two-component structural adhesive.

[0006] Furthermore, the outer side of the finished baffle plate is fixed to the front edge adhesive angle.

[0007] Furthermore, the two sets of the finished baffle plates are respectively disposed on the leading edge and trailing edge of the blade, and the two sets of the finished baffle plates are in contact on one side of the leeward side of the blade and the contact ends are shaped to match.

[0008] Furthermore, one set of the finished baffle plates is provided with lightning arrester mounting holes.

[0009] Furthermore, the main structure is assembled by welding angle iron, and the internal space of the main structure is filled with epoxy structural adhesive and then cured.

[0010] Furthermore, the thickness of the angle iron is 3mm.

[0011] The beneficial effects of this technical solution are as follows: The two sets of adhesive baffles in this technical solution are respectively set on the leading edge and trailing edge of the blade, which can increase the bonding surface. After the mold is closed and the adhesive is applied, the structural adhesive can be fully filled into the bonding surface. After the mold is closed, it can not only effectively avoid quality problems such as insufficient adhesive at the tip of the aluminum blade and misalignment of the lightning arrester mounting hole, but also avoid problems such as residual adhesive falling off and clogging the drainage hole and puncturing the blade root cover plate during the later operation of the blade, which can damage the stability of the blade operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram illustrating the connection between the baffle plate for the drainage hole at the tip of a wind turbine blade and the aluminum blade tip according to this utility model.

[0013] Figure 2 This is a structural diagram of the main structure;

[0014] Figure 3 A schematic diagram showing the structure of a non-porous release membrane, a release cloth, and a biaxial cloth covering the exterior of the main structure. Detailed Implementation

[0015] The following detailed description illustrates the specific implementation method:

[0016] The reference numerals in the accompanying drawings include: 1. Main structure, 2. Non-porous isolation membrane, 3. Release cloth, 4. Dual shaft cloth, 5. Aluminum blade tip, 6. Finished baffle plate, 7. Leading edge bonding angle, 8. Bonding surface, 9. Lightning arrester mounting hole.

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The basic implementation examples are as follows: Figure 1-3The image shows a wind turbine blade tip drainage hole baffle, comprising a main structure 1, a non-porous isolation membrane 2, a release cloth 3, and a biaxial cloth 4 (specification H2AX808 [HBX808(+45 / -45)EP]). The main structure 1 is a triangular prism structure, assembled by welding angle iron with a thickness of 3mm. The internal space of the main structure 1 is filled with epoxy structural adhesive and cured. The non-porous isolation membrane 2 covers the two bottom surfaces and adjacent sides in the height direction of the main structure 1, with the side with the shortest bottom edge of the main structure 1 not covered. The release cloth 3 covers the non-porous isolation membrane 2 and adjacent sides in the height direction of the main structure 1. The biaxial cloth 4 is impregnated with epoxy resin and wrapped around the outside of the release cloth 3, covering adjacent sides in the height direction of the main structure 1. After curing, it is demolded to form a preliminary baffle body. The preliminary baffle body is cut according to the mold surface to form the finished baffle body 6. The pre-assembled baffle plate 6 is bonded to the windward side of the blade shell using a two-component structural adhesive. Two sets of pre-assembled baffle plates 6 are respectively located at the leading and trailing edges of the blade, with the two sets of pre-assembled baffle plates 6 contacting each other on the leeward side of the blade and having matching contact ends. One set of pre-assembled baffle plates 6 has a lightning arrester mounting hole 9, and the outer side of the other set of pre-assembled baffle plates 6 is fixed to the leading edge at an adhesive angle 7.

[0019] In this technical solution, the two sets of adhesive baffles 6 are respectively set on the leading edge and trailing edge of the blade, which can increase the bonding surface 8. After the mold is closed and the adhesive is applied, the structural adhesive can be fully filled into the bonding surface 8. After the mold is closed, it can not only effectively avoid quality problems such as insufficient adhesive at the aluminum blade tip 5 and displacement of the lightning arrester mounting hole 9, but also avoid problems such as residual adhesive falling off and clogging the drainage hole and puncturing the blade root cover plate during the later operation of the blade, which can damage the stability of the blade operation.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A baffle plate for drainage holes at the tip of a wind turbine blade, characterized in that: The system includes a main structure (1), a non-porous isolation membrane (2), a release cloth (3), and a biaxial cloth (4). The main structure (1) is a triangular prism structure. The non-porous isolation membrane (2) covers the two bottom surfaces of the main structure (1) and the adjacent sides in the height direction. The height side corresponding to the side with the shortest bottom edge of the main structure (1) is not covered. The release cloth (3) covers the outside of the non-porous isolation membrane (2) and covers the adjacent sides in the height direction of the main structure (1). The biaxial cloth (4) is impregnated with epoxy resin and wrapped around the outside of the release cloth (3) and covers the adjacent sides in the height direction of the main structure (1). After curing, the system is demolded to form a preliminary baffle plate. The preliminary baffle plate is cut according to the mold surface to form the finished baffle plate (6).

2. The wind turbine blade tip drainage hole baffle plate according to claim 1, characterized in that: The finished baffle plate (6) is bonded to the windward side of the blade shell using a two-component structural adhesive.

3. The wind turbine blade tip drainage hole baffle plate according to claim 1, characterized in that: The outer side of the finished baffle plate (6) is fixed to the front edge bonding angle (7).

4. The wind turbine blade tip drainage hole baffle plate according to claim 3, characterized in that: The two sets of the finished baffle plates (6) are respectively located on the leading edge and trailing edge of the blade, and the two sets of the finished baffle plates (6) are in contact on one side of the leeward side of the blade and the contact ends are matched in shape.

5. The wind turbine blade tip drainage hole baffle plate according to claim 4, characterized in that: One of the finished baffle plates (6) is provided with lightning arrester mounting holes (9).

6. The wind turbine blade tip drainage hole baffle plate according to claim 1, characterized in that: The main structure (1) is assembled by welding angle iron, and the internal space of the main structure (1) is filled with epoxy structural adhesive and cured.

7. The wind turbine blade tip drainage hole baffle plate according to claim 6, characterized in that: The angle iron has a thickness of 3mm.

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