WO2021097913A1

WO2021097913A1 - Strip-shaped member, beam and manufacturing method therefor, blade, and wind turbine generator

Info

Publication number: WO2021097913A1
Application number: PCT/CN2019/122718
Authority: WO
Inventors: 苏成功; 杨敬东; 宋秋香; 曾鸿铭; 冯俐
Original assignee: 中材科技风电叶片股份有限公司
Priority date: 2019-11-22
Filing date: 2019-12-03
Publication date: 2021-05-27
Also published as: CN110836164A; JP2022535468A; CN110836164B; BR112021004259B1; JP7174211B2; BR112021004259A2

Abstract

Disclosed are a strip-shaped member, a beam and a manufacturing method therefor, a blade, and a wind turbine generator. The beam comprises a plurality of strip-shaped member sets (10a) arranged in the transverse direction; each of the strip-shaped member sets (10a) is provided with a plurality of strip-shaped members (100) stacked in the longitudinal direction; each of the strip-shaped members (100) extends in the axial direction of the strip-shaped member and comprises a first side face (110) and a second side face (120) which are arranged opposite each other in the thickness direction, and a first curved face (130) and a second curved face (140) which are arranged opposite each other in the width direction; the first curved faces (130) of the strip-shaped members (100) in the strip-shaped member sets (10a) are arranged side by side to form first curved-face tooth-shaped structures; the second curved faces (140) of the strip-shaped members (100) in the strip-shaped member sets (10a) are arranged side by side to form second curved-face tooth-shaped structures; and the first curved-face tooth-shaped structure and the second curved-face tooth-shaped structure, which are adjacent, of adjacent strip-shaped member sets (10a) are embedded into each other or abut against each other. The beam and the strip-shaped members are compactly arranged, and as such, resin flows more smoothly.

Description

Strip, beam and manufacturing method thereof, blade and wind turbine

Cross-references to related applications

This application claims the priority of the Chinese patent application 201911159039.7 filed on November 22, 2019 titled "Strips, beams and manufacturing methods, blades and wind turbines", the entire content of which is incorporated herein by reference in.

Technical field

This application relates to the field of wind power generation, in particular to a strip, a beam and a manufacturing method thereof, a blade and a wind turbine.

Background technique

With the continuous development of wind power technology, it has become a development trend in the industry to provide more stable and more powerful wind turbines. On the one hand, high-power wind turbines will make the blades longer and longer. The increase of blade length puts forward new requirements for blade structure design.

Wind turbine blades usually consist of two upper and lower shells to form the outer contour, and the beam-web structure is used to carry the load inside. The beam is the main bearing component. As the length of the blade increases, the load borne by the beam is also increasing, and the requirements for the load-bearing capacity of the beam are getting higher and higher. As a beam structure, plates have the advantages of excellent mechanical properties and simple processing methods. Using plates as strips and stacking to form reinforced structural parts is an important technical idea for blade design in the field of wind power.

However, the beam members formed by stacking the strips in the prior art usually have the problems of unreasonable arrangement of the strips and unreasonable surface shape of the strips, so that the arrangement of the strips is not compact enough, and the resin is Excessive enrichment in a specific location affects the structural strength of the beam, and the surface shape of the strip affects the resin flow when the resin is filled.

Summary of the invention

The present application provides a strip, a beam and a manufacturing method thereof, blades and a wind turbine. The strips of the beam are arranged compactly and make the resin flow more smoothly.

In a first aspect, an embodiment of the present application provides a beam for blades, comprising a plurality of strip groups arranged in a transverse direction, and each strip group has a plurality of strips stacked in a longitudinal direction. It extends along its own axis and includes a first side surface and a second side surface opposed to each other in the thickness direction, and a first curved surface and a second curved surface opposed to each other in the width direction. The first curved surface of each strip in the strip group The first curved tooth structure is formed side by side, the second curved surfaces of each strip in the strip group form a second curved tooth structure side by side, the adjacent first curved tooth structure and the second curved surface of the adjacent strip group The tooth-like structures are fitted or abutted with each other.

According to one aspect of the embodiment of the present application, an hourglass-like gap is formed between the horizontally adjacent strips in the adjacent strip groups.

According to one aspect of the embodiments of the present application, the horizontally adjacent strips in the adjacent strip groups are correspondingly arranged.

According to an aspect of the embodiments of the present application, the first side surface and the second side surface together with the first curved surface and the second curved surface define the cross section of the strip, and the contour lines of the corresponding cross section of the first curved surface and the second curved surface are continuous curves. .

According to one aspect of the embodiment of the present application, the cross section of the strip is a centrally symmetrical figure or a mirrored symmetrical figure.

According to an aspect of the embodiments of the present application, the first side surface and the second side surface intersect with the first curved surface and the second curved surface at an obtuse angle.

According to one aspect of the embodiments of the present application, the first curved surface has a protruding end in the width direction, and the protruding end is adjacent to the first side surface in the thickness direction; the second curved surface has a protruding end in the width direction, and the protruding end is in the thickness direction Adjacent to the second side.

According to one aspect of the embodiments of the present application, the first side surface and the second curved surface respectively have a first groove and a first side groove extending along the axial direction of the strip, and the first groove and the first side groove are in communication.

According to one aspect of the embodiments of the present application, the second side surface and the first curved surface respectively have a second groove and a second side groove extending along the axial direction of the strip, and the second groove and the second side groove are communicated with each other.

According to an aspect of the embodiments of the present application, the dimensions of the first side groove and the second side groove in the thickness direction are both greater than half of the thickness of the strip.

According to one aspect of the embodiments of the present application, a diversion interlayer is provided between the strips, and the diversion interlayer is a fiber cloth.

In a second aspect, the embodiments of the present application provide a strip-shaped member, which extends along its own axis and includes a first side surface and a second side surface opposed to each other in the thickness direction, and a first curved surface opposed to the width direction. And the second curved surface, so that the first curved surfaces of the plurality of strip-shaped members can form a first curved tooth-like structure side by side, and the second curved surfaces of the plurality of strip-shaped members can form a second curved tooth-like structure side by side.

In a third aspect, an embodiment of the present application provides a method for fabricating a beam, including: providing a plurality of strips, the strips extend along their own axial direction and include first and second side surfaces that are oppositely arranged in the thickness direction, and The first curved surface and the second curved surface are arranged oppositely in the width direction; the strips are stacked on the mold, so that the plurality of strips are stacked in the longitudinal direction into a strip group and the plurality of strip groups are arranged in the transverse direction, so that The first curved surfaces of the strips in the strip group are arranged side by side to form a first curved tooth structure, the second curved surfaces of the strips in the strip group are arranged side by side to form a second curved tooth structure, and the adjacent strip groups are The adjacent first curved tooth structure and the second curved tooth structure are fitted or abutted with each other; the resin is supplied to the gap between the strip group and the strips adjacent in the longitudinal direction of the strip group Between; curing the resin to bond the strips together.

In a fourth aspect, an embodiment of the present application provides a blade including the beam according to any one of the foregoing embodiments.

In a fifth aspect, an embodiment of the present application provides a wind turbine including the blade according to any one of the above-mentioned embodiments.

According to the beam of the embodiment of the present application, the first curved surfaces of the strips in the strip group are arranged side by side to form a first curved tooth structure, and the second curved surfaces of the strips in the strip group are arranged side by side to form a second curved tooth structure. Shape structure, the adjacent first curved tooth structure and the second curved tooth structure of the adjacent strips are fitted or abutted with each other, so that the strips can be arranged compactly, and the resin is in the strips. The beam is evenly distributed without excessive enrichment. The beam structure is stronger, and the tooth-like structure is curved so that the resin flows more smoothly when filling the resin, which improves the efficiency and quality of the infusion, and avoids the occurrence of between the strips. Defects such as cavities and bubbles.

Description of the drawings

The features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of a three-dimensional structure of a beam according to an embodiment of the present application;

2 shows a schematic diagram of a cross-sectional structure of a beam according to the first embodiment of the present application;

3 shows a schematic diagram of a partial cross-sectional structure of a beam according to the first embodiment of the present application;

4 shows a schematic diagram of a cross-sectional structure of a strip in a beam according to the first embodiment of the present application;

5 shows a schematic cross-sectional structure diagram of a strip in a beam according to a second embodiment of the present application;

Fig. 6 shows a schematic diagram of a partial cross-sectional structure of a beam according to a second embodiment of the present application;

Fig. 7 shows a schematic diagram of a three-dimensional structure of a strip according to an embodiment of the present application;

Fig. 8 shows a schematic cross-sectional structure diagram of a strip according to a third embodiment of the present application;

Fig. 9 shows a flow chart of a method for manufacturing a beam according to an embodiment of the present application;

Fig. 10 shows a schematic diagram of a three-dimensional structure of a blade according to an embodiment of the present application;

FIG. 11 shows a schematic diagram of a three-dimensional structure of a region A in a blade according to an embodiment of the present application;

Fig. 12 shows a schematic diagram of a three-dimensional structure of a wind turbine according to an embodiment of the present application.

In the drawings, the drawings are not drawn to actual scale.

Mark description:

1- impeller; 2- generator; 3- nacelle; 4- tower;

10-blade; 11-shell; 12-web; 13-beam; 20-hub;

100-strips; 10a-strips group;

110-first side surface; 111-first groove;

120-second side surface; 121-second groove;

130-first curved surface; 131-second side groove;

140-second curved surface; 141-first side groove;

210-first peeling layer; 220-second peeling layer;

X-transverse; Y-longitudinal; L-length direction.

Detailed ways

The implementation of the present application will be described in further detail below with reference to the accompanying drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principle of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions, and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application, and not configured to limit the present application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

The orientation words appearing in the following description are all directions shown in the figure, and do not limit the specific structure of the application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrally connected; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in this application can be understood according to specific circumstances.

In order to better understand the present application, the strips, beams and manufacturing methods thereof, blades and wind turbines according to the embodiments of the present application will be described in detail below with reference to FIGS. 1 to 12.

Please refer to Figures 1, 2 and 3, Figure 1 shows a schematic diagram of a three-dimensional structure of a beam according to an embodiment of the present application; Figure 2 shows a schematic cross-sectional structure of a beam according to the first embodiment of the present application; The partial cross-sectional structure diagram of the beam of the first embodiment of the present application.

The embodiments of the present application provide a beam used for blades, especially for blades of wind turbines. As shown in FIG. 1, the beam provided by the embodiment of the present application is generally elongated, and has a transverse X, a longitudinal Y, and a longitudinal direction L as shown in the figure. As shown in FIG. 2 and FIG. 3, the embodiment of the present application provides a plurality of strip-shaped element groups 10 a arranged along the transverse direction X. There may be a gap between the adjacent strip groups 10a, and the gap may be a small gap, or the adjacent strip groups 10a are closely arranged. Each strip group 10a has a plurality of strips 100 stacked in a longitudinal direction Y. Specifically, the axes of the plurality of strips 100 are substantially parallel. It can be understood that in the process of stacking and arranging the strips 100, due to operation errors, there will be slight deviations in positions, so that the axes of the strips 100 are approximately parallel within a certain allowable error range.

Wherein, the strip 100 may be a preform, for example, a preform formed by techniques such as pultrusion, infusion, and pre-curing. The strip 100 may preferably be a pultruded member. The strip 100 extends along its own axial direction and includes a first side surface 110 and a second side surface 120 opposed to each other in the thickness direction, and a first curved surface 130 and a second curved surface 140 opposed to the width direction. Specifically, the surface curves of the first curved surface 130 and the second curved surface 140 may be a parabola, a logarithmic curve, a sine curve, an exponential curve, a cosine curve, or a section of a curve composed of the foregoing curves. In the strip group 10a, adjacent first side surfaces 110 and second side surfaces 120 between adjacent strips 100 are arranged correspondingly. In an optional embodiment, the adjacent first side surfaces 110 and second side surfaces The two sides 120 are attached to each other.

The first curved surfaces 130 of the strips 100 in the strip group 10a are arranged side by side to form a first curved tooth structure. In the first curved tooth structure, the tooth shapes are arranged side by side along the longitudinal direction Y, and are arranged curved and undulating along the transverse direction X. The second curved surfaces 140 of each strip 100 in the strip group 10a are arranged side by side to form a second curved tooth structure. In the second curved tooth structure, the tooth shapes are arranged side by side along the longitudinal direction Y, and are arranged curved and undulating along the transverse direction X. The adjacent first curved tooth structure and the second curved tooth structure of the adjacent strip group 10a are fitted with each other. That is, the convex position of the first curved tooth structure is correspondingly fitted to the concave position of the second curved tooth structure with a gap therebetween. Accordingly, the convex position of the second curved tooth structure is correspondingly fitted to the concave position of the second curved tooth structure. The concave position of the first curved tooth structure leaves a gap. In other optional embodiments, the adjacent first curved tooth structure and the second curved tooth structure of the adjacent strip group 10a abut each other. Specifically, the first curved dentate structure and the second curved dentate structure in the adjacent strip group 10a may abut each other at a specific position, for example, form a contact point. It can be understood that, according to process requirements or process errors, a small gap may be formed at some of the contact points.

According to the beam of the embodiment of the present application, the first curved surface 130 of each strip 100 in the strip group 10a forms a first curved tooth structure side by side, and the second curved surface 140 of each strip 100 in the strip group 10a The second curved dentate structure is formed side by side, and the adjacent first curved dentate structure and the second curved dentate structure of the adjacent strip group 10a are fitted or abutted with each other, so that the strips 100 can be arranged Compact, the resin is evenly distributed among the strips 100 without being over-enriched, and the structural stability and strength of the beam are enhanced, and the load-bearing capacity of the beam is improved. The tooth-like structure is curved so that when the resin is filled The resin circulates more smoothly, improves the efficiency and quality of infusion, and avoids defects such as cavities and bubbles between the strips.

In some embodiments, an hourglass-like gap is formed between the adjacent strips 100 along the transverse direction X in the adjacent strip groups 10a. Specifically, continue to refer to Figures 2 and 3, the hourglass-like gap may gradually transition from a wider gap position to a narrower gap position, and then gradually transition from the narrower gap position to another wider gap position. Gap position. The hourglass-like gap may be inclined with respect to the longitudinal direction Y. Further, the widest gap position in the transverse direction X in this type of hourglass gap may be located between the adjacent strips 100 in the longitudinal direction Y. A plurality of hourglass-like gaps formed between the first curved tooth structure and the adjacent second curved tooth structure are sequentially connected. The hourglass-like gap further makes the resin flow more smoothly, improves the efficiency and quality of the infusion, and avoids defects such as cavities and bubbles between the strips.

In some embodiments, continuing to refer to FIGS. 2 and 3, the strips 100 adjacent to each other along the transverse direction X in the strip group 10 a are correspondingly arranged. In a preferred embodiment, the strips 100 between adjacent strip groups 10a are arranged flush in the longitudinal direction Y. In this way, in the process of arranging the plurality of strips 100 into a beam, the strips 100 can be arranged on a flat surface without the need for additional protrusions or pads for adjusting the longitudinal Y position of the strips 100. Further, the strips 100 in the strip group 10a are aligned in the transverse direction X. In this way, in the process of arranging the plurality of strips 100 into a beam, the strips 100 can be simply stacked along the longitudinal direction Y, which improves the production efficiency. It can be understood that in the process of stacking and arranging the strips 100, due to operation errors, there will be slight deviations in positions, so that the strips 100 are roughly level within a certain allowable error range.

In some embodiments, at least part of the surface of the strip 100 in the strip group 10a is preferably a rough surface. Specifically, additional layers such as release cloth, fiber cloth, etc. can be used, or commonly used such as grinding, cutting, and etching can be used. Process to form a rough surface.

Please also refer to FIG. 4, which shows a schematic diagram of a cross-sectional structure of a strip in a beam according to the first embodiment of the present application.

In some embodiments, continuing to refer to FIG. 4, the first side surface 110 and the second side surface 120 of the strip 100 together with the first curved surface 130 and the second curved surface 140 define the cross section of the strip 100, the first curved surface 130 and The contour lines of the cross section corresponding to the second curved surface 140 are respectively continuous curves. The first curved surface 130 and the second curved surface 140 are curved surfaces curved in the width direction and the thickness direction. When the resin is filled, the continuous curve makes the resin flow more smoothly, improves the resin filling efficiency, and forms a good bond between the resin and the strip 100. In addition, the curved surface can more closely conform to the skin shape of the blade, so that the gap with the skin is smaller, and the amount of resin between the skin and the skin is reduced.

In some embodiments, continuing to refer to Fig. 4, the cross-section of the strip 100 is a centrally symmetrical figure. In this way, in the process of stacking the strips 100 into a beam, the strips 100 can be placed in the forward and reverse directions along the longitudinal direction Y, which does not affect the cooperation with other strips 100, so that the stacked strips 100 are The process efficiency is higher, saving time and labor costs. In other optional embodiments, the cross-section of the strip 100 may be a mirror-symmetrical figure, as long as a curved surface can be provided and the curved surfaces of adjacent strips 100 can be fitted or abutted.

Specifically, the first curved surface 130 of the strip 100 has a protruding end in the width direction, and the protruding end is adjacent to the first side surface 110 in the thickness direction. Further, the second curved surface 140 of the strip 100 has a protruding end in the width direction, and the protruding end is adjacent to the second side surface 120 in the thickness direction. The cross section of the strip 100 is a parallelogram-like shape. In this way, the extending direction of the gap between adjacent strips 100 in the transverse direction X is inclined relative to the transverse direction X, which can increase the bonding area between the resin and the strips 100, increase the bonding strength, and thereby increase the strength of the beam.

In some embodiments, continuing to refer to FIG. 4, the first side surface 110 and the second side surface 120 of the strip 100 and the first curved surface 130 and the second curved surface 140 intersect at an obtuse angle. It can avoid the stress concentration easily caused by the acute-angle structure and the cracks that easily appear when the acute-angle structure is loaded, thereby improving the strength of the strip 100 and the beam. Moreover, it is more conducive to place a release cloth or other peelable layer that can roughen the surface of the strip 100 on the first side 110 and the second curved surface 140, or on the second side 120 and the first curved surface 130, and avoid demolding It is difficult to remove cloth or other peelable layers.

Please refer to FIG. 5 and FIG. 6. FIG. 5 shows a schematic cross-sectional structure diagram of a bar in a beam according to a second embodiment of the present application; FIG. 6 shows a partial cross-sectional structure diagram of a beam according to the second embodiment of the present application.

In some embodiments, the first side surface 110 and the second curved surface 140 respectively have a first groove 111 and a first side groove 141 extending along the axial direction of the strip 100. The first groove 111 is recessed from the first side surface 110 into the strip 100, and the depth of the recess is generally uniform. The depth of the first groove 111 and the first side groove 141 may be between 50 μm and 500 μm. The first side groove 141 is recessed from the second curved surface 140 into the strip 100, and the depth of the recess is generally uniform. The first groove 111 communicates with the first side groove 141. The groove bottom surface of the first groove 111 and the groove bottom surface of the first side groove 141 intersect at an obtuse angle, and the groove bottom surface of the first groove 111 is arranged substantially parallel to the first side surface 110. The groove bottom surface of the first groove 111 and the groove bottom surface of the first side groove 141 may be rough surfaces.

In some embodiments, please continue to refer to FIGS. 5 and 6, the second side surface 120 and the first curved surface 130 respectively have a second groove 121 and a second side groove 131 extending along the axial direction of the strip 100. The second groove 121 is recessed from the second side surface 120 into the strip 100, and the depth of the recess is generally uniform. The depth of the second groove 121 and the second side groove 131 may be between 50 μm and 500 μm. The second side groove 131 is recessed from the first curved surface 130 into the strip 100, and the depth of the recess is generally uniform. The second groove 121 communicates with the second side groove 131. The groove bottom surface of the second groove 121 and the groove bottom surface of the second side groove 131 intersect at an obtuse angle, and the groove bottom surface of the second groove 121 is arranged substantially parallel to the second side surface 120. The groove bottom surface of the second groove 121 and the groove bottom surface of the second side groove 131 may be rough surfaces. The rough surface enables the resin to flow and fill better between the mating rough surfaces.

In some embodiments, please continue to refer to FIGS. 5 and 6, the dimensions of the first side groove 141 and the second side groove 131 in the thickness direction are both greater than half of the thickness of the strip 100. That is, the position of the first side groove 141 away from the groove wall of the first groove 111 is closer to the second side surface 120 relative to the first side surface 110. Correspondingly, the position of the second side groove 131 away from the groove wall of the second groove 121 is closer to the first side surface 110 than the second side surface 120. In this way, the adjacent first side grooves 141 and second side grooves 131 between adjacent strips 100 in the transverse direction X overlap in the longitudinal direction Y, so that the adjacent strips 100 can be closer together, and A gap sufficient to fill the resin is left, so that the strip 100 can be arranged more closely, and the strength of the beam can be increased.

In some embodiments, the first side 110 and the second side 120 are substantially flat. In other embodiments, the first side surface 110 and the second side surface 120 are curved surfaces, which can better conform to the curved contour of the blade.

In some embodiments, a diversion interlayer is provided between the strips 100, and the diversion interlayer is a fiber cloth, such as a two-dimensional woven fiber cloth. In some optional embodiments, the flow guide interlayer is arranged between the strip groups 10a. Correspondingly, adjacent strips 100 in the strip group 10a are arranged in close contact with each other. In other optional embodiments, the flow guiding interlayer surrounds the first side surface 110, the second curved surface 140, the second side surface 120 and the first curved surface 130 of the strip 100. Correspondingly, there is a diversion interlayer between adjacent strips 100 in the strip group 10a. The flow guide interlayer is beneficial for the resin to infiltrate between the strips 100 uniformly and well, and reduces the risk of the strips 100 not being penetrated by the resin. The guide interlayer can be a woven sheet. Specifically, the diversion interlayer is a two-dimensional woven fiber cloth, the surface weight of the diversion interlayer is 100-1200kg/m2, and the weaving mode of the diversion interlayer can be 0°/90° interlacing or ±45° interlacing.

In some embodiments, the strips 100 are arranged in a plane or curved surface along the transverse direction X. The strips 100 are arranged along the transverse direction to adapt to the contour of the blade. In the embodiment in which the strips 100 are arranged in a curved manner, since the surfaces on both sides of the gap are curved, and the adjacent first curved tooth structure and the second curved tooth structure of the adjacent strip group 10a are between Mutual fit and form an hourglass-like gap. The hourglass-like gap can be self-adapted by self-adjusting the position of the narrowest width. It will not form a closed space at the gap and will not affect the flow of resin in the gap, thus avoiding resin Poor perfusion.

Please also refer to FIG. 7. FIG. 7 shows a schematic diagram of a three-dimensional structure of a strip according to an embodiment of the present application.

The embodiment of the present application provides a strip 100 that extends along its own axial direction and includes a first side surface 110 and a second side surface 120 oppositely arranged in the thickness direction and a first curved surface oppositely arranged in the width direction 130 and the second curved surface 140, so that the first curved surfaces 130 of the plurality of strips 100 can form a first curved tooth-like structure side by side, and the second curved surfaces 140 of the plurality of strips 100 can form a second curved tooth-like structure side by side. Specifically, the first curved surface 130 and the second curved surface 140 enable the plurality of strips 100 stacked in the longitudinal direction Y to form a curved tooth-like structure on both sides, and make the strips 100 adjacent to each other in the transverse direction X Mutual fit and form an hourglass-like gap. The strip 100 may be a high-strength fiber structure. The strip 100 may be a long-shaped plate, and FIG. 7 only schematically shows a section of the strip 100 along the length direction. The width of the strip 100 may be between 50 mm and 250 mm, and the thickness may be between 2 mm and 15 mm.

Specifically, the first side surface 110 and the second side surface 120 of the strip 100 and the first curved surface 130 and the second curved surface 140 jointly define the cross section of the strip 100, and the first curved surface 130 and the second curved surface 140 correspond to the cross-section of the strip 100. The contour lines are respectively continuous curves. The cross section of the strip 100 is a centrally symmetrical figure. The first curved surface 130 of the strip 100 has a protruding end in the width direction, and the protruding end is adjacent to the first side surface 110 in the thickness direction. The second curved surface 140 of the strip 100 has a protruding end in the width direction, and the protruding end is adjacent to the second side surface 120 in the thickness direction. The cross section of the strip 100 is a parallelogram-like shape. The first side surface 110 and the second side surface 120 of the strip 100 intersect with the first curved surface 130 and the second curved surface 140 at obtuse angles.

Further, the first side surface 110 and the second curved surface 140 respectively have a first groove 111 and a first side groove 141 extending along the axial direction of the strip 100. In some embodiments, the second side surface 120 and the first curved surface 130 respectively have a second groove 121 and a second side groove 131 extending along the axial direction of the strip 100.

Please refer to FIG. 8, which shows a schematic cross-sectional structure diagram of a strip according to a third embodiment of the present application.

In some embodiments, the groove bottom surfaces of the first groove 111 and the first side groove 141 at least partially cover the first peeling layer 210. The first peeling layer 210 is elongated, and one surface is attached to the groove bottom surface of the first groove 111 and the groove bottom surface of the first side groove 141. The first peeling layer 210 may be a release cloth, that is, the first peeling layer 210 is releasably formed on part of the first side surface 110 and part of the second curved surface 140 of the strip 100 during the pultrusion molding process of the strip 100, After the first peeling layer 210 is peeled off, the first groove 111 and the first side groove 141 are exposed.

In some embodiments, the bottom surfaces of the second groove 121 and the second side groove 131 at least partially cover the second peeling layer 220. The second peeling layer 220 is elongated, and one surface is attached to the bottom surface of the second groove 121 and the bottom surface of the second side groove 131. The second peeling layer 220 may be a release cloth, that is, the second peeling layer 220 is releasably formed on a part of the second side surface 120 and a part of the first curved surface 130 of the strip 100 during the pultrusion molding process of the strip 100, After the second peeling layer 220 is peeled off, the second groove 121 and the second side groove 131 are exposed.

Please refer to FIG. 9, which shows a flowchart of a method for manufacturing a beam according to an embodiment of the present application.

The embodiment of the present application provides a method for manufacturing a beam, which includes the steps:

S110: Provide a strip 100, which extends along the length direction L and includes a first side surface 110 and a second side surface 120 opposite to each other in the longitudinal direction Y, and a first curved surface 130 and a second surface 130 opposite to each other in the transverse direction X. Curved surface 140.

In some embodiments, the cross section of the strip 100 is a centrally symmetrical figure.

S120: Stack the strips 100 on the mold so that the plurality of strips 100 are stacked in the longitudinal direction Y into a strip group 10a and the plurality of strip groups 10a are arranged in the transverse direction X, so that each of the strip groups 10a The first curved surfaces 130 of the strips 100 form a first curved tooth-like structure side by side, the second curved surfaces 140 of each strip 100 in the strip group 10a form a second curved tooth-like structure side by side, and the adjacent strip groups 10a The adjacent first curved tooth structure and the second curved tooth structure are fitted or abutted with each other.

S130: Supply resin to the gap between the strip group 10a and between the strips 100 adjacent in the longitudinal direction Y in the strip group 10a.

S140: Curing the resin to bond the strips 100 together.

Specifically, the strip 100 is stacked between the airtight cover and the mold to form a pouring space surrounding the strip 100, and one or more pouring ports and pumps are arranged on the airtight cover. Vacuum port, a pump used for vacuuming vacuums the filling space through the vacuum port. The resin enters the infusion space in a vacuum state through the infusion port, while keeping the pump continuing to work, so that the resin fills the gap between the strip groups 10a and the joint surface between the strips 100 in the strip group 10a. After that, the resin may be cured by heating the mold to bond the strips 100 together.

According to the method of manufacturing the beam of the embodiment of the present application, the strips 100 are arranged to have a first curved tooth-like structure and a second curved tooth-like structure, and the adjacent first curved tooth-like structures of the adjacent strip group 10a and The second curved tooth-like structures are interlocked with each other, the formed beam structure is stronger, and the tooth-like structure is curved. During the filling of resin, the resin can flow quickly and smoothly, and it is evenly distributed in the gap. Excessive enrichment.

Please refer to FIGS. 10 and 11. FIG. 10 shows a schematic diagram of a three-dimensional structure of a blade according to an embodiment of the present application; FIG. 11 shows a schematic diagram of a three-dimensional structure of an area A in a blade according to an embodiment of the present application.

The embodiment of the present application provides a blade 10. The blade 10 provided in the embodiment of the present application includes a shell 11 and a web 12. The web 12 is arranged in the shell 11 and connected to the shell 11. The blade 10 also includes a beam 13 according to any of the above-mentioned embodiments. The beams 13 are located at the two ends where the web 12 is connected to the shell 11, and the beams 13 extend along the length direction of the blade 10. The blade 10 provided by the embodiment of the present application includes the beam 13 according to any of the above embodiments, so that the blade 10 has high structural stability and strength, and has a stronger load bearing capacity.

Referring to FIG. 12, FIG. 12 shows a schematic diagram of a three-dimensional structure of a wind turbine according to an embodiment of the present application.

The embodiment of the application provides a wind turbine generator. The wind turbine generator provided by the embodiment of the application mainly includes a tower 4, a nacelle 3, a generator 2 and an impeller 1. The nacelle 3 is arranged at the top of the tower 4, and the generator 2 is arranged in the nacelle 3. It can be located inside the nacelle 3, of course, it can also be located outside the nacelle 3. The impeller 1 includes a hub 20, and the generator 2 is connected to the hub 20 and fixed on the base of the nacelle 3. The wind turbine generator provided by the embodiment of the present application includes the blade 10 according to any of the above-mentioned embodiments. Two or more blades 10 are connected to the hub 20 respectively, and the blades 10 drive the hub 20 to rotate under the action of wind load, thereby realizing the power generation of the generator 2. The wind turbine generator provided by the embodiment of the present application includes the blade 10 according to any of the above embodiments. The blade 10 has high structural stability and high strength, so that the wind turbine generator can operate continuously more stably and reliably.

According to the above-mentioned embodiments of the present application, these embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of this application, so that those skilled in the art can make good use of this application and make modifications on the basis of this application. This application is only limited by the claims and their full scope and equivalents.

Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it without departing from the scope of the present application and the components therein can be replaced with equivalents. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any manner. This application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

A beam used for a blade, including a plurality of strip-shaped member groups arranged in a transverse direction, each of the strip-shaped member groups having a plurality of strip-shaped members stacked in a longitudinal direction, and the strip-shaped members are along its own axis Extending in the direction of the thickness and including a first side surface and a second side surface opposite to each other in the thickness direction, and a first curved surface and a second curved surface opposite to the width direction,

The first curved surfaces of each of the strips in the strip group are arranged side by side to form a first curved tooth structure, and the second curved surfaces of each of the strips in the strip group are arranged side by side to form a first curved tooth structure. Two-curved tooth-like structure, the adjacent first curved tooth-like structure and the second curved tooth-like structure of the adjacent strip group are fitted or abutted with each other.
The beam according to claim 1, wherein an hourglass-like gap is formed between the adjacent strips in the group of adjacent strips along the lateral direction.
The beam according to claim 1, wherein the strips adjacent in the transverse direction in the adjacent strip groups are arranged correspondingly.
The beam according to claim 1, wherein the first side surface and the second side surface together with the first curved surface and the second curved surface define a cross-section of the strip member, and the first curved surface The contour lines of the cross section corresponding to the second curved surface are respectively continuous curves.
The beam according to claim 4, wherein the cross section of the strip-shaped member is a centrally symmetric figure or a mirror symmetric figure.
The beam according to claim 1, wherein the first side surface and the second side surface and the first curved surface and the second curved surface intersect at an obtuse angle.
The beam according to claim 1, wherein the first curved surface has a protruding end in the width direction, and the protruding end is adjacent to the first side surface in the thickness direction; the second curved surface has a protruding end in the width direction A protruding end, and the protruding end is adjacent to the second side surface in the thickness direction.
The beam according to claim 7, wherein the first side surface and the second curved surface respectively have a first groove and a first side groove extending along the axial direction of the strip, and the first The groove communicates with the first side groove.
The beam according to claim 8, wherein the second side surface and the first curved surface respectively have a second groove and a second side groove extending along the axial direction of the strip, and the second The groove communicates with the second side groove.
9. The beam according to claim 9, wherein the dimensions in the thickness direction of the first side groove and the second side groove are both greater than half of the thickness of the strip.
The beam according to claim 1, wherein a diversion interlayer is arranged between the strips, and the diversion interlayer is a fiber cloth.
A strip-shaped piece, wherein the strip-shaped piece extends along its own axis and includes a first side surface and a second side surface oppositely arranged in the thickness direction, and a first curved surface and a second curved surface oppositely arranged in the width direction, The first curved surfaces of the plurality of strip-shaped elements can form a first curved tooth-like structure side by side, and the second curved surfaces of the plurality of strip-shaped elements can form a second curved tooth-like structure side by side.
A method for making beams, which includes:

Providing a plurality of strips, the strips extending in the axial direction of the strips and comprising first and second side surfaces oppositely arranged in the thickness direction and first and second curved surfaces oppositely arranged in the width direction;

Stack the strips on a mold such that a plurality of the strips are stacked in the longitudinal direction into the strip group and the plurality of strip groups are arranged in the transverse direction, so that the strip group is The first curved surfaces of each of the strips form a first curved tooth-like structure side by side, and the second curved surfaces of each of the strips in the strip group form a second curved tooth-like structure side by side. The adjacent first curved tooth structure and the second curved tooth structure adjacent to the strip member group are fitted or abutted with each other;

Supply resin to the gaps between the strip groups and between the strips adjacent in the longitudinal direction in the strip group;

The resin is cured to bond the strips together.
A blade comprising the beam according to any one of claims 1 to 11.
A wind turbine generator comprising the blade according to claim 14.