CN218953481U

CN218953481U - Carbon fiber curved surface pultrusion plate and girder cap

Info

Publication number: CN218953481U
Application number: CN202223498303.XU
Authority: CN
Inventors: 谢富原; 刘凯; 王明旭; 李孝忠
Original assignee: Zhejiang Tuanyuan Composite Material Co ltd
Current assignee: Guodian United Power Technology Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-02
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a carbon fiber curved surface pultrusion plate and a girder cap, which comprise a pultrusion plate body, wherein the pultrusion plate body is of a curved surface structure, and is curved in the section direction and the length direction; the girder cap is formed by stacking a plurality of pultrusion plates, the lengths and the curvatures of the pultrusion plates are uniformly changed according to the stacking direction, and the heights of gaps between adjacent pultrusion plates are consistent. The stacked girder caps can be conformal with the blade skin, gaps between the girder caps and the blade skin are uniform, and when loaded, each pultrusion plate and the carbon fibers in the pultrusion plate can uniformly bear girder loads, so that stress concentration is avoided.

Description

Carbon fiber curved surface pultrusion plate and girder cap

Technical Field

The utility model relates to the field of carbon fiber pultruded panels, in particular to a carbon fiber curved surface pultruded panel and a girder cap.

Background

The wind power generation is a power generation technology for converting wind energy into electric energy by adopting large blades, with the development of the technology, the single-machine power generation power requirement is larger and larger, the blade size is larger and the requirements on the strength and rigidity of the blade are higher and higher, and the large blades with the main girder caps stacked by the carbon fiber pultrusion plates become the current mainstream technology.

At present, the general wind blade girder cap pultruded plate is made of glass fiber materials or carbon fiber materials, the molded surface of the general wind blade girder cap pultruded plate is straight, the cross section of the general wind blade girder cap pultruded plate is basically rectangular, and part of the general wind blade girder cap pultruded plate is chamfered at four corners of the rectangle to form oblique chamfer angles or arc chamfer angles. The pultruded panels are uniform in specification and convenient for centralized production, packaging and transportation, but when the main girder caps are stacked, a large amount of uneven gaps can be caused due to mismatching of straight pultruded panels and curved surfaces of the skin. After resin infusion, these gaps form areas of concentrated resin, which in turn become areas of weakness and break first when the blade is loaded, resulting in blade failure. In addition, because the pultruded panels are not conformal with the blades, when the blades are loaded, the girder load cannot be uniformly transferred to each pultruded panel, so that the internal stress of the girder cap is concentrated, and the strength and rigidity advantages of the carbon fiber pultruded panels cannot be effectively exerted.

Disclosure of Invention

In order to solve the problems, the utility model provides the carbon fiber curved surface pultrusion plate and the girder cap, which can realize the conformal shape of the girder cap and the blade skin and effectively exert the strength and rigidity advantages of the carbon fiber pultrusion plate.

For this purpose, the technical scheme of the utility model is as follows: a carbon fiber curved surface pultrusion plate comprises a pultrusion plate body, wherein the pultrusion plate body is of a curved surface structure, and the cross section direction and the length direction are both curved surfaces. The cross-sectional curvature and the lengthwise curvature of the pultruded panels are continuously variable.

Preferably, a plurality of pultruded panel bodies having different curvatures and lengths may be stacked and fixed to each other.

Preferably, the pultruded panel body is formed by pressing carbon fibers.

The other technical scheme of the utility model is as follows: a girder cap is formed by stacking a plurality of pultrusion plates, the lengths and curvatures of the pultrusion plates are uniformly changed according to the stacking direction, and the heights of gaps between adjacent pultrusion plates are consistent.

Preferably, a plurality of pultruded panels are stacked from bottom to top, the curvature of the pultruded panels increases from bottom to top in sequence, and the length of the pultruded panels decreases from bottom to top in sequence.

The length and curvature change parameters of each pultrusion plate are obtained by decomposing a main girder cap mathematical model, the number of layers and position numbers are given to the main girder cap, and each pultrusion plate is identified; the complete main girder caps can be stacked according to the number of layers and position numbers, and the shape main body of the main girder caps is consistent with the main girder caps after stacking; and the stacked girder caps can be conformal with the blade skin, and the gaps between the girder caps and the blade skin are uniform.

Preferably, the gaps between adjacent pultruded panels are filled with resin, and the adjacent pultruded panels are fixed together by the resin.

Preferably, the same layer of resin has a uniform thickness and different layers of resin have the same thickness.

Compared with the prior art, the utility model has the beneficial effects that:

1. the main girder caps are stacked by using a set of curved pultrusion plates, the stacked main girder caps can be conformal with the blade skin, the gaps between the main girder caps and the blade skin are uniform, and when loaded, each pultrusion plate and the carbon fibers in each pultrusion plate can uniformly bear the main girder load, so that stress concentration is avoided;

2. the girder cap formed by stacking the curved surface pultrusion plates has the advantages that the gaps between the inner pultrusion plates and the pultrusion plates are uniform, the resin concentration area is uniform when the pouring molding is carried out, the large-area resin concentration is avoided, the load can be uniformly dispersed, and the strength and rigidity advantages of the carbon fiber pultrusion plates are effectively exerted.

Drawings

The following is a further detailed description of embodiments of the utility model with reference to the drawings

FIG. 1 is a schematic view of a curved pultruded panel according to the present utility model;

FIG. 2 is a schematic view of the structure of the spar cap of the present utility model.

Marked in the figure as: the curved surface pultrusion panel 1, the section direction F1, the length direction F2 and the girder cap 2.

Detailed Description

In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such feature, and in the description of the present utility model, the meaning of "a number", "a number" is two or more, unless otherwise specifically defined.

Example 1

The carbon fiber curved surface pultrusion plate 1 of the embodiment comprises a pultrusion plate body, wherein the pultrusion plate body is formed by pressing carbon fibers, the pultrusion plate body is of a curved surface structure, and the cross section direction F1 and the length direction F2 are both curved surfaces. The cross-sectional curvature and the lengthwise curvature of the pultruded panels are continuously variable.

The curvature change of the cross section of the carbon fiber pultrusion plate is obtained by decomposing the profile of the blade and the paving thickness; the carbon fiber curved surface pultrusion plate can be conformal with the profile of the blade when the pultrusion plates are stacked. A set of pultruded plates with different curved surfaces is formed, a main girder cap is mutually stacked, and the main girder cap is conformal with the profile of the blade and can be clung to the skin of the blade.

Example 2

The main girder cap 2 is formed by stacking a plurality of curved-surface pultrusion plates 1, and the lengths and the curvatures of the pultrusion plates are uniformly changed according to the stacking direction; when a plurality of pultrusion panels are stacked from bottom to top, the curvature of the pultrusion panels is sequentially increased from bottom to top, and the length of the pultrusion panels is sequentially reduced from bottom to top.

The length and curved surface curvature change parameters of each pultrusion plate are obtained by decomposing a main girder cap mathematical model, the number of layers and position numbers are given to the main girder cap mathematical model, and each pultrusion plate is identified; the complete main girder caps can be stacked according to the number of layers and position numbers, and the shape main body of the main girder caps is consistent with the main girder caps after stacking; and the stacked girder caps can be conformal with the blade skin, and the gaps between the girder caps and the blade skin are uniform.

The gaps between the adjacent pultruded plates are uniform and the heights are uniform, the adjacent pultruded plates are fixed into a whole through resin, when resin infusion molding is carried out, the areas where the resin is concentrated are uniform, the thickness of the same layer of resin is uniform, the thicknesses of different layers of resin are the same, and no large area of resin is concentrated.

The girder cap 2 formed by stacking a plurality of curved surface pultrusion plates 1 can uniformly bear girder load by each pultrusion plate and carbon fiber inside the pultrusion plate when the girder cap is loaded, so that stress concentration is avoided; simultaneously, the conformal of girder cap and blade covering avoids the inside uneven and the big space that produces between girder cap and the blade covering in space between the inside pultrusion board of girder cap, still further realizes by the conformal of pultrusion board that carbon fiber silk bundle distributes and the conformal of blade, can evenly disperse load to effectively exert the intensity and the rigidity advantage of carbon fiber pultrusion board.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a carbon fiber curved surface pultrusion board which characterized in that: the novel drawing and extruding plate comprises a drawing and extruding plate body, wherein the drawing and extruding plate body is of a curved surface structure, the drawing and extruding plate body is of a curved surface in the cross section direction and the length direction, and the cross section curvature and the length direction curvature of the drawing and extruding plate are continuously changed.

2. A carbon fiber curved pultruded panel according to claim 1, wherein: the plurality of pultruded panel bodies with different curvatures and lengths can be mutually stacked and fixed.

3. A carbon fiber curved pultruded panel according to claim 1, wherein: the pultrusion plate body is formed by pressing carbon fibers.

4. A spar cap, characterized in that: a stack of a plurality of the pultruded panels according to any of claims 1 to 3, wherein the lengths and curvatures of the pultruded panels are uniformly varied in the stacking direction, and the heights of the gaps between adjacent pultruded panels are uniform.

5. The spar cap of claim 4, wherein: the plurality of pultruded panels are stacked from bottom to top, the curvature of the pultruded panels is sequentially increased from bottom to top, and the length of the pultruded panels is sequentially reduced from bottom to top.

6. The spar cap of claim 4, wherein: the gaps between the adjacent pultruded panels are filled with resin, and the adjacent pultruded panels are fixed into a whole through the resin.

7. The spar cap of claim 6, wherein: the thickness of the same layer of resin is uniform, and the thicknesses of different layers of resin are the same.