CN216866891U

CN216866891U - Blade and wind generating set

Info

Publication number: CN216866891U
Application number: CN202123041404.XU
Authority: CN
Inventors: 郭光星; 张磊; 闻笔荣
Original assignee: Jiangsu Goldwind Science and Technology Co Ltd
Current assignee: Jiangsu Goldwind Science and Technology Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-07-01
Anticipated expiration: 2031-12-06

Abstract

The embodiment of the utility model provides a blade and a wind generating set, wherein the blade comprises: the shell comprises a pressure wall, a suction wall and an accommodating cavity, wherein the pressure wall and the suction wall are connected with each other, the accommodating cavity is formed by the pressure wall and the suction wall in an enclosing mode, and the shell is provided with a blade tip and a blade root which are oppositely arranged along a first direction; the reinforcing part is located and holds the chamber, and the reinforcing part includes first connecting portion, second connecting portion and stiffening beam, and first connecting portion and second connecting portion all extend the shaping along the first direction, and first connecting portion connect in the pressure wall one side that holds the chamber towards, and the second connecting portion connect in the suction wall one side that holds the chamber towards, and a plurality of stiffening beams distribute along the first direction, and each stiffening beam is fixed connection respectively between first connecting portion and second connecting portion. The reinforcing component provided by the embodiment of the utility model has less material consumption and larger deformation, can better absorb the vibration of the blade and prolongs the service life of the blade.

Description

Blade and wind generating set

Technical Field

The utility model relates to the technical field of wind power generation equipment, in particular to a blade and a wind generating set.

Background

With the continuous development of wind power generation technology, the size of wind generating sets is also continuously increased, wherein the size of blades as important components of the wind generating sets is also continuously increased. As the size of the blades has increased, their weight and load have also increased, which puts higher demands on the structural strength and fatigue properties of the blades. When a large wind turbine generator under the shutdown working condition encounters lateral wind, the blade can vibrate, and the service life of the blade can be seriously influenced by long-time vibration.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a blade and a wind generating set, and aims to prolong the service life of the blade.

Embodiments of a first aspect of the utility model provide a blade for a wind park, the blade comprising: the shell comprises a pressure wall, a suction wall and a containing cavity, wherein the pressure wall and the suction wall are connected with each other, the containing cavity is formed by the pressure wall and the suction wall in an enclosing mode, and the shell is provided with a blade tip and a blade root which are arranged oppositely along a first direction; the reinforcing part is located and holds the chamber, and the reinforcing part includes first connecting portion, second connecting portion and stiffening beam, and first connecting portion and second connecting portion all extend the shaping along the first direction, and first connecting portion connect in the pressure wall one side that holds the chamber towards, and the second connecting portion connect in the suction wall one side that holds the chamber towards, and a plurality of stiffening beams distribute along the first direction, and each stiffening beam is fixed connection respectively between first connecting portion and second connecting portion.

According to an embodiment of the first aspect of the present invention, a plurality of reinforcement beams are arranged end to end in the first direction, and two adjacent reinforcement beams intersect.

According to any of the preceding embodiments of the first aspect of the utility model, the reinforcement beams have connecting ends, the connecting ends of at least one set of two adjacent reinforcement beams have abutment surfaces, and the connecting ends of at least one set of two adjacent reinforcement beams are in abutting connection with each other through the abutment surfaces.

According to any one of the embodiments of the first aspect of the present invention, the reinforcing member further includes an elastic pad disposed between the abutting surfaces of the two adjacent connecting ends.

According to any one of the preceding embodiments of the first aspect of the present invention, the included angle between two adjacent reinforcement beams is 60 ° to 120 °.

According to any one of the preceding embodiments of the first aspect of the utility model, the reinforcement beam comprises:

the shell comprises a wall part and a filling cavity enclosed by the wall part;

and the honeycomb core material is positioned in the filling cavity.

According to any one of the preceding embodiments of the first aspect of the present invention, the reinforcement beam further comprises one or more reinforcing ribs, the reinforcing ribs are located in the filling cavity, and the reinforcing ribs are formed to extend along the length direction of the reinforcement beam.

According to any one of the preceding embodiments of the first aspect of the present invention, the shell has a leading edge and a trailing edge oppositely disposed in the second direction;

the number of the reinforcing members is plural, and the plural reinforcing members are distributed at intervals in the second direction.

According to any one of the preceding embodiments of the first aspect of the present invention, the plurality of reinforcing members are spaced apart along the second direction, and the oblique beam is connected between two adjacent reinforcing members in the second direction.

According to any one of the preceding embodiments of the first aspect of the utility model, the shape of the first connection portion and the surface of the pressure wall facing the receiving chamber are adapted, and/or the shape of the second connection portion and the surface of the suction wall facing the receiving chamber are adapted.

Embodiments of the second aspect of the present invention further provide a wind turbine generator system, including a blade according to any one of the embodiments of the first aspect.

In a blade provided in an embodiment of the present invention, the blade includes a shell and a reinforcing member, and the reinforcing member is provided in the shell. The reinforcing component comprises a first connecting portion, a second connecting portion and a reinforcing beam, and the plurality of reinforcing beams are fixedly connected between the first connecting portion and the second connecting portion, so that the reinforcing component is a frame structure body, and the weight of the reinforcing component can be reduced. Compared with a plate-shaped web plate, the reinforcing component provided by the embodiment of the utility model has the advantages that the material consumption is less, the deformation of the reinforcing component is larger, the vibration of the blade can be better absorbed, and the service life of the blade is prolonged.

Drawings

Other features, objects and advantages of the utility model will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.

FIG. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a blade according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of FIG. 2;

FIG. 4 is a schematic structural view of a reinforcing component of a blade according to an embodiment of the present invention;

FIG. 5 is a schematic view of a portion of the enlarged structure at I in FIG. 4;

FIG. 6 is a schematic view of a reinforcement beam of a blade according to an embodiment of the present invention;

fig. 7 is a partially enlarged schematic view of fig. 2 in another embodiment.

Description of reference numerals:

10. a tower; 20. a nacelle; 30. a blade;

100. a housing; 110. a pressure wall; 120. a suction wall; 130. a blade tip; 140. a blade root; 150. a leading edge; 160. a trailing edge; 170. an accommodating chamber;

200. a reinforcing member; 210. a first connection portion; 220. a second connecting portion; 230. a reinforcing beam; 231. a connecting end; 232. an abutting surface; 233. a housing; 234. a honeycomb core material; 235. reinforcing ribs; 240. an elastic pad;

300. and (4) an oblique beam.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the utility model and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the 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 relative importance.

The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

As the size of the blades continues to scale, their weight and loads continue to increase, which places higher demands on the structural strength and fatigue properties of the blades. When a large wind generating set under the shutdown working condition encounters lateral wind, the blade flutters, and the safety of the whole set can be seriously threatened by long-time vibration. The best method for reducing the vibration amplitude of the blade is to increase the damping of the blade, however, the blade is made of glass fiber or carbon fiber composite materials, the damping ratio is about two thousandth, and the severe vibration is difficult to be inhibited by too small damping value. High damping materials are added into the blades or modulation dampers and other modes are additionally installed on the blades, so that the high damping blades can be obtained, but the modes can greatly increase the weight of the blades and are not beneficial to the improvement of the structural performance of the blades. In sum, the light-weight high-damping blade is the core design concept of the future ultra-large blade.

On the other hand, the manufacturing process of a large blade is a rather complicated process of multi-thread operation. The concept of modular blades is becoming increasingly appreciated in order to reduce worker operation time and reduce manufacturing costs. However, due to the complex and variable curved surface shape of the blade, the complete realization of the modularized blade faces a great difficulty. At present, parts of a blade mainly comprise a blade root, a main beam, a web plate and the like, and the parts are manufactured in a mould in advance and then combined into a complete blade through a vacuum suction and injection process. The web is a simpler and regular part in the blade, the web of each type of blade has different sizes, but has similar basic structures, has the advantage of modular development, and can be manufactured in batches in a short time.

For better understanding of the present invention, an electric blade and a wind turbine generator set according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 7.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention.

As shown in FIG. 1, an embodiment of the first aspect of the present invention provides a wind turbine generator system including a tower 10, a nacelle 20 mounted on the tower 10, and blades 30 connected to the nacelle 20. The vane 30 rotates clockwise in the direction indicated by the arrow in fig. 1.

There are various embodiments of the blade 30, please refer to fig. 2 and fig. 3, and fig. 2 is a schematic structural diagram of the blade 30 according to an embodiment of the present invention. Fig. 3 is a partial structural schematic view of fig. 2.

As shown in fig. 2 and 3, the blade 30 according to the embodiment of the present invention includes: a casing 100 including a pressure wall 110, a suction wall 120 and a receiving cavity 170 defined by the pressure wall 110 and the suction wall 120, the casing 100 having a blade tip 130 and a blade root 140 oppositely arranged along a first direction (X direction in fig. 2); and a reinforcing member 200 positioned in the receiving cavity 170, the reinforcing member 200 being coupled between the pressure wall 110 and the suction wall 120 to improve the structural strength of the blade 30.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a reinforcing member 200 of a blade 30 according to an embodiment of the present invention. Fig. 5 is a partially enlarged schematic view of the structure at I in fig. 4.

In some alternative embodiments, the reinforcing member 200 includes a first connecting portion 210, a second connecting portion 220, and reinforcing beams 230, the first connecting portion 210 and the second connecting portion 220 are formed to extend in a first direction, the first connecting portion 210 is connected to a side of the pressure wall 110 facing the accommodating cavity 170, the second connecting portion 220 is connected to a side of the suction wall 120 facing the accommodating cavity 170, the plurality of reinforcing beams 230 are distributed in the first direction, and each reinforcing beam 230 is fixedly connected between the first connecting portion 210 and the second connecting portion 220.

In the blade 30 provided in the embodiment of the present invention, the blade 30 includes the outer shell 100 and the reinforcing member 200, and the reinforcing member 200 is disposed in the outer shell 100. The reinforcing member 200 includes the first connection portion 210, the second connection portion 220, and the reinforcing beams 230, and the plurality of reinforcing beams 230 are fixedly connected between the first connection portion 210 and the second connection portion 220, so that the reinforcing member 200 is a frame structure body, and the weight of the reinforcing member 200 can be effectively reduced while having a sufficient load-bearing capacity. Compared with a plate-shaped web, the reinforcing component 200 provided by the embodiment of the utility model has less material consumption, the deformation of the reinforcing component 200 is larger, the vibration of the blade 30 can be better absorbed, and the service life of the blade 30 is prolonged.

In addition, the reinforcing component 200 is a frame structure, so that the reinforcing component 200 can be disassembled into a plurality of parts, modular production is realized, the preparation efficiency of the blade 30 can be effectively improved, and the assembly efficiency of the wind driven generator is improved.

The first connection portion 210 may be disposed in various manners, for example, the first connection portion 210 is plate-shaped, and the shape of the first connection portion 210 is matched with the shape of the inner surface of the pressure wall 110 facing the accommodating cavity 170, so that the first connection portion 210 can better adhere to the inner surface of the pressure wall 110, the contact area between the first connection portion 210 and the inner surface of the pressure wall 110 is increased, and the stability of the relative position between the first connection portion 210 and the pressure wall 110 is ensured.

The first connection portion 210 may be adhered to the inner surface of the pressure wall 110 by, for example, structural glue.

The second connection portion 220 may be disposed in various manners, for example, the second connection portion 220 is plate-shaped, and the shape of the second connection portion 220 is matched with the shape of the inner surface of the suction wall 120 facing the accommodating cavity 170, so that the second connection portion 220 can better fit with the inner surface of the suction wall 120, the contact area between the second connection portion 220 and the inner surface of the suction wall 120 is increased, and the stability of the relative position between the second connection portion 220 and the suction wall 120 is ensured.

There are various ways in which the reinforcing beams 230 are distributed at the first and second connecting

portions

210 and 220, for example, a plurality of reinforcing beams 230 are arranged side by side in the first direction at the first and second connecting

portions

210 and 220. Or the reinforcing beam 230 is provided to cross between the first connection portion 210 and the second connection portion 220.

Or as shown in fig. 5, in other alternative embodiments, a plurality of reinforcing beams 230 are arranged end to end along the first direction, and two adjacent reinforcing beams 230 intersect. In these alternative embodiments, the plurality of reinforcing beams 230 intersect, so that a triangular reinforcing structure is formed between two adjacent reinforcing beams 230 and the first connecting portion 210 and/or the second connecting portion 220, which can effectively improve the structural strength of the reinforcing member 200, further improve the structural strength of the blade 30, and further improve the service life of the blade 30.

The shape of the reinforcing beam 230 may be variously set, and the reinforcing beam 230 has, for example, a cylindrical shape or a prismatic shape.

In order to further reduce the spacing between two adjacent reinforcement beams 230. Referring to fig. 6, fig. 6 is a schematic structural view of a reinforcing beam 230 of a blade 30 according to an embodiment of the present invention.

In some alternative embodiments, as shown in fig. 5 and 6, the reinforcing beams 230 have connecting ends 231, the connecting ends 231 of at least one set of two adjacent reinforcing beams 230 have abutting surfaces 232, and the connecting ends 231 of at least one set of two adjacent reinforcing beams 230 are connected to each other in an abutting manner by the abutting surfaces 232.

In these alternative embodiments, two adjacent reinforcing beams 230 are connected to each other by the abutting surface 232, which not only can reduce the distance between two adjacent reinforcing beams 230, so that more reinforcing beams 230 can be provided for the first connecting portion 210 and the second connecting portion 220, and the reinforcing member 200 can have sufficient structural strength. And the contact area of two adjacent stiffening beams 230 can be increased, and the stability of the relative position between two adjacent stiffening beams 230 can be ensured.

Among the plurality of reinforcing beams 230 distributed in the first direction, any two adjacent reinforcing beams 230 abut against each other through the abutting surface 232; alternatively, among the plurality of reinforcing beams 230 distributed in the first direction, some adjacent two reinforcing beams 230 abut against each other through the abutting surfaces 232, and the connecting ends 231 of other adjacent two reinforcing beams 230 are spaced apart from each other.

In some optional embodiments, the reinforcing member 200 further includes an elastic pad 240, and the elastic pad 240 is disposed between the abutting surfaces 232 of two adjacent connecting ends 231. The elastic pad 240 can improve the friction between two adjacent abutting surfaces 232, and prolong the service life of the reinforcing beam 230. The elastic pad 240 can absorb the deformation of the reinforcing beam 230, reduce the deformation of the reinforcing member 200, reduce the deformation load transmitted from the reinforcing member 200 to the casing 100, reduce the vibration amplitude of the blade 30, reduce the probability of damage to the blade 30, and improve the service life of the blade 30.

The elastic pad 240 may be disposed in various ways, and the elastic pad 240 is, for example, a rubber pad.

There are various ways to arrange the adjacent two stiffening beams 230 in opposite positions, and in some alternative embodiments, the included angle between the adjacent two stiffening beams 230 is 60 ° to 120 °. When the included angle between two adjacent reinforcing beams 230 is within the above range, it can be avoided that the supporting force of the reinforcing beam 230 on the first connecting portion 210 and/or the second connecting portion 220 is insufficient due to an excessively large included angle between two adjacent reinforcing beams 230, which affects the overall structural strength of the reinforcing member 200; too small included angle between two adjacent reinforcing beams 230 can be avoided, which results in too large distribution density of the reinforcing beams 230 and thus too large weight of the reinforcing member 200.

The reinforcing beam 230 may be fixedly coupled to the first and

second coupling parts

210 and 220 by means of fastening means such as bonding, mortise and tenon, and bolts.

The reinforcing beam 230 may be provided in various manners, and the reinforcing beam 230 may have an i-beam structure, or the reinforcing beam 230 may have a solid beam structure.

In other alternative embodiments, as shown in fig. 6, the reinforcing beam 230 includes: a housing 233 including a wall portion and a filling chamber enclosed by the wall portion; and a honeycomb core 234 positioned in the filling cavity.

In these alternative embodiments, the reinforcing beam 230 includes the shell 233 and the honeycomb core 234 located in the shell 233, which can both ensure sufficient strength of the reinforcing beam 230 and reduce the weight of the reinforcing beam 230, so that the reinforcing member 200 has lightweight characteristics. In addition, the honeycomb core 234 has a large damping value, so that deformation of the reinforcing beam 230 in the vibration process of the blade 30 can be greatly absorbed, the deformation load transmitted to the casing 100 by the reinforcing component 200 is further reduced, the vibration amplitude of the blade 30 is reduced, the probability of damage to the blade 30 is reduced, and the service life of the blade 30 is prolonged.

Alternatively, the extending direction of the honeycomb cells in the honeycomb core 234 is the same as the extending direction of the reinforcing beam 230, that is, the length of the honeycomb cells in the honeycomb core 234 is the same as the length of the reinforcing beam 230.

Alternatively, the material of the honeycomb core 234 may be aluminum alloy, glass fiber fabric, or the like. In order to make the honeycomb core material have a high damping value, the shape of the honeycomb holes may be hexagonal, circular, rectangular, star-shaped, etc.

In some alternative embodiments, to further improve the structural strength of the reinforcement beam 230, the reinforcement beam 230 further includes a stiffener 235, the stiffener 235 is located in the filling cavity, and the stiffener 235 is formed to extend along the length of the reinforcement beam 230. There are a variety of sets of stiffeners 235, and one or more stiffeners 235 may be provided in the stiffening beam 230. To ensure that the reinforcement beam 230 is uniformly stressed throughout, referring to fig. 6, a plurality of stiffeners 235 (e.g., 5 stiffeners) are uniformly distributed within the reinforcement beam 230. When one rib 235 is provided, the rib 235 is located on the central axis of the reinforcing beam 230.

The blade 30 has a leading edge 150 and a trailing edge 160 oppositely disposed in a second direction (Z direction in fig. 2).

There are many ways to arrange the number of the reinforcing members 200 in the outer shell 100 of the blade 30, and there may be one reinforcing member 200, and one reinforcing member 200 is arranged in the outer shell 100 between the leading edge 150 and the trailing edge 160.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating a partial enlarged structure of fig. 2 in another embodiment.

In other alternative embodiments, the number of the reinforcing members 200 may be plural, and the plural reinforcing members 200 are spaced apart along the second direction. By providing a plurality of reinforcing members 200, the structural strength of the blade 30 can be further improved, and the service life of the blade 30 can be improved.

Optionally, when there are a plurality of reinforcing members 200, an oblique beam 300 may be connected between two adjacent reinforcing members 200 in the second direction, so that two adjacent reinforcing members 200 in the second direction are connected to each other through the oblique beam 300 to form an integrated multi-reinforcing member 200 structure.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A blade (30) of a wind park comprising:

the shell (100) comprises a pressure wall (110), a suction wall (120) and a containing cavity (170) which is formed by enclosing the pressure wall (110) and the suction wall (120), wherein the pressure wall (110) and the suction wall (120) are connected with each other, and the shell (100) is provided with a blade tip (130) and a blade root (140) which are oppositely arranged along a first direction;

the reinforcing component (200) is positioned in the accommodating cavity (170), the reinforcing component (200) comprises a first connecting part (210), a second connecting part (220) and reinforcing beams (230), the first connecting part (210) and the second connecting part (220) are formed in an extending mode along the first direction, the first connecting part (210) is connected to one side, facing the accommodating cavity (170), of the pressure wall (110), the second connecting part (220) is connected to one side, facing the accommodating cavity (170), of the suction wall (120), the reinforcing beams (230) are distributed along the first direction, and the reinforcing beams (230) are fixedly connected between the first connecting part (210) and the second connecting part (220) respectively.

2. Blade (30) according to claim 1, wherein a plurality of reinforcement beams (230) are arranged end to end in the first direction, and two adjacent reinforcement beams (230) intersect.

3. Blade (30) according to claim 2, wherein the reinforcement beams (230) have connection ends (231), the connection ends (231) of at least one set of two adjacent reinforcement beams (230) having abutment surfaces (232), the connection ends (231) of at least one set of two adjacent reinforcement beams (230) being in mutual abutting connection by means of the abutment surfaces (232).

4. Blade (30) according to claim 3, characterized in that the reinforcing part (200) further comprises an elastic pad (240), the elastic pad (240) being arranged between the abutment surfaces (232) of two adjacent connection ends (231).

5. Blade (30) according to claim 2, wherein the angle between two adjacent reinforcement beams (230) is 60 ° to 120 °.

6. The blade (30) of claim 1, wherein the reinforcement beam (230) comprises:

a housing (233) including a wall portion and a fill cavity enclosed by the wall portion;

a honeycomb core (234) located in the fill cavity.

7. The blade (30) of claim 6, wherein the reinforcement beam (230) further comprises one or more ribs (235), wherein the ribs (235) are located in the filling cavity, and wherein the ribs (235) are formed to extend along a length of the reinforcement beam (230).

8. Blade (30) according to claim 1,

the shell (100) has a leading edge (150) and a trailing edge (160) oppositely arranged along a second direction;

the number of the reinforcing components (200) is multiple, and the plurality of reinforcing components (200) are distributed at intervals along the second direction.

9. Blade (30) according to claim 8, wherein a plurality of said reinforcement members (200) are spaced apart along said second direction, and wherein a stringer (300) is connected between two adjacent reinforcement members (200) in said second direction.

10. Blade (30) according to claim 1, characterized in that the first connection (210) and the pressure wall (110) are adapted in shape to the surface facing the receiving cavity (170) and/or in that the second connection (220) and the suction wall (120) are adapted in shape to the surface facing the receiving cavity (170).

11. A wind park according to any of claims 1-10, comprising a blade (30) according to any of claims 1-10.