CN216767623U

CN216767623U - Modular wind power blade connecting structure

Info

Publication number: CN216767623U
Application number: CN202220489312.3U
Authority: CN
Inventors: 谈昆伦; 刘叶霖; 曹磊
Original assignee: Changzhou Hongfa Zongheng Advanced Material Technology Co Ltd
Current assignee: Newtech Group Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-06-17
Anticipated expiration: 2032-03-08

Abstract

The utility model relates to the technical field of wind power blades, in particular to a modularized wind power blade connecting structure, wherein a blade main body along the length direction comprises a blade root part, a blade middle part and a blade tip part, the blade middle part comprises a front edge module, a girder box module and a rear edge module which are sequentially connected along the width direction of the blade middle part, the front edge module and the rear edge module are of opening structures which are oppositely arranged, the girder box module comprises two webs which are arranged in parallel at intervals and two girder caps which are connected with the two ends of the two webs, the opening end of the front edge module and the opening end of the rear edge module are respectively connected with the side walls of the two girder caps in an adhesive mode, the side walls of the girder caps are inclined planes, and the outer surfaces of the front edge module, the girder module and the rear edge module form a smooth closed curved surface. According to the utility model, the main girder box module is bonded with the front edge module and the rear edge module without being connected by bolts, so that the weight of the wind power blade is reduced, the cost of lightning protection design is reduced, and the integral strength of the wind power blade is improved.

Description

Modular wind power blade connecting structure

Technical Field

The utility model relates to the technical field, in particular to a modularized wind power blade connecting structure.

Background

The wind power blade is a core component for converting natural wind energy into electric energy of the wind generating set in the wind generating set, and is also a main basis for measuring the design and technical level of the wind generating set. With the development of wind power blade technology, the size limitation of the wind power blade is continuously broken through, and the sectional type wind power blade is gradually applied and popularized in order to conveniently manufacture and install large blades.

In the related art, a structure form of being divided into modules in the width direction of the blade is adopted, as shown in fig. 1, the front edge member 01, the middle member 02 and the rear edge member 03 are connected in the width direction through bolts 04, and through the arrangement of the connection mode, the processing and the field assembly are convenient, and the wind turbine blade is suitable for large-scale wind turbine blade manufacturing;

however, the overall weight of the wind power blade is increased by the mode of connecting through the bolts 04, and the consideration of lightning protection is also required to be increased during design, so that the manufacturing cost is increased to a certain extent.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: a modularized wind power blade connecting structure is provided to replace a bolt connecting mode.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a modularization wind-powered electricity generation blade connection structure, this wind-powered electricity generation blade include root of leaf portion, leaf middle part and leaf point portion along length direction's blade main part, the leaf middle part is including leading edge module, girder case module and the trailing edge module that connects gradually on its width direction, wherein:

the utility model discloses a girder box module, including leading edge module, trailing edge module, girder box module, front edge module and trailing edge module, the opening structure that leading edge module and trailing edge module set up for relative, the girder box module include two parallel interval set up the web and with two girder caps that the both ends of web are connected, the open end of leading edge module and the open end of trailing edge module respectively with two the lateral wall bonding connection of girder cap, the lateral wall of girder cap is the inclined plane, just the surface of leading edge module, girder module and trailing edge module constitutes level and smooth closed curved surface.

Furthermore, the two ends of the web plate are bent at the joint of the main beam cap, so that the bent side face is attached to the inner wall of the main beam cap.

Furthermore, the two webs are bent towards the opposite direction.

Furthermore, still have the enhancement layer on the girder cap inner wall, the enhancement layer with the hem connection of the kink of web.

Further, the inclined surface of the main beam cap is arranged in a necking shape towards the inner part.

Further, the spar cap inner surface has a reinforcing layer connected to the leading edge module and the trailing edge module.

Further, the inclined surface of the spar cap flares inwardly.

Further, the outer surfaces of the leading edge module, the back rail module, and the spar cap are connected by a stiffener.

Furthermore, the inclined surface of the main beam cap is divided into two sections which are arranged into a shape of flaring and necking, and the contact position of the inner side surfaces of the front edge module and the rear edge module is used as a boundary point.

Further, the inner and outer sides of the spar cap each have a reinforcing layer attached to the leading edge module and the trailing edge module.

The utility model has the beneficial effects that: according to the utility model, through the mode that the main girder box module is bonded with the front edge module and the rear edge module, on one hand, the connection through bolts is not needed, the weight of the wind power blade is reduced, and simultaneously, the cost of lightning protection design is also reduced, and on the other hand, the overall strength of the wind power blade is also improved through the arrangement of the main girder box module.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a connection structure of modular wind turbine blades connected by bolts in the background art of the present application;

FIG. 2 is a schematic diagram of a top-view explosion structure of a modular wind turbine blade according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a cross-sectional structure of a middle portion of a modular wind turbine blade according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a main girder box module according to an embodiment of the utility model;

FIG. 5 is an enlarged view of a portion A of FIG. 4 according to one embodiment of the present invention;

FIG. 6 is an enlarged view of a portion B shown in FIG. 3 according to one embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a cross-sectional structure of a middle portion of a modular wind turbine blade according to a second embodiment of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 7 at C according to a second embodiment of the present invention;

FIG. 9 is a schematic cross-sectional structure view of a cross-section of the middle of a blade of a modular wind turbine blade according to a third embodiment of the present invention;

fig. 10 is a partial enlarged view of the portion D in fig. 7 according to the third embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example one

As shown in fig. 2 to 6, the blade body of the wind turbine blade along the length direction includes a blade root portion 10, a blade middle portion 20 and a blade tip portion 30, as shown in fig. 2, the blade middle portion 20 is divided into a plurality of sections along the length direction thereof, and is also arranged modularly along the width direction, by this arrangement, the manufacturing and installation convenience of the large wind turbine blade can be improved, as shown in fig. 3, the blade middle portion 20 includes a leading edge module 21, a main girder box module 22 and a trailing edge module 23 which are connected in sequence along the width direction thereof, wherein:

the leading edge module 21 and the trailing edge module 23 are of an opening structure which are oppositely arranged, the girder box module 22 comprises two webs 22a which are arranged in parallel at intervals and two girder caps 22b which are connected with two ends of the two webs 22a, in the embodiment of the utility model, the girder cap 22b at the upper side is arranged in a concave manner, the girder cap 22b at the lower side is arranged in a concave manner, and the girder caps are smoothly connected with the leading edge module 21 and the trailing edge module 23 to form a continuous curve;

the open end of the front edge module 21 and the open end of the rear edge module 23 are respectively connected with the side walls of the two main beam caps 22b in an adhesive manner, the side walls of the main beam caps 22b are inclined surfaces, and the outer surfaces of the front edge module 21, the main beam modules and the rear edge module 23 form a smooth closed curved surface. The area of the bonding surface can be increased by arranging the inclined surface, and compared with the I-shaped main beam in the prior art, the strength of the main beam box module 22 is higher, so that the overall strength of the wind power blade is higher;

in the above embodiment, the main girder box module 22 is bonded to the front edge module 21 and the rear edge module 23, so that on one hand, the bolts are not needed to connect, the cost of the lightning protection design is reduced while the weight of the wind power blade is reduced, and on the other hand, the overall strength of the wind power blade is also improved by the main girder box module 22.

On the basis of the above embodiment, as shown in fig. 4 and 5, the joints between the two ends of the web 22a and the spar caps 22b are bent, so that the bent sides are attached to the inner walls of the spar caps 22 b. It should be noted that the bending of the web 22a can increase the contact area with the spar cap 22b, thereby increasing the bonding strength with the spar, and in addition, the bending arrangement also increases the support and tensile strength of the web 22a to the spar cap 22 b; of course, the bending may be inward bending as shown in fig. 4, or outward bending, or inward bending on one side and outward bending on the other side;

in the embodiment of the present invention, in order to improve the supporting strength and uniformity, the two webs 22a are bent toward each other as shown in fig. 4. In addition, in order to further improve the connection strength between the bent portion of the web 22a and the spar cap 22b, in the embodiment of the present invention, as shown in fig. 5, the spar cap 22b further has a reinforcing layer 22b1 on the inner wall thereof, and the reinforcing layer 22b1 is connected to the bent portion of the web 22a by taping. The reinforcing layer 22b1 can be carbon fiber prepreg or fabric made of other materials, and the overall strength of the girder box module 22 is further improved by covering and adhering the large area of the bending part of the web plate 22 a;

in the embodiment of the present invention, the connection between the spar cap 22b and the front edge module 21 and the rear edge module 23 on both sides is a key point, and for this reason, the present invention makes different improvements to the connection surface of the spar cap 22b, as shown in fig. 5 and 6, in one embodiment of the present invention, the inclined surface of the spar cap 22b is arranged in a necking shape toward the inside. The necking arrangement means that the length of the outer surface of the spar cap 22b in the width direction is greater than the length of the inner surface, and the necking arrangement can facilitate increasing the contact connection area of the spar cap 22b with the leading edge module 21 and the trailing edge module 23, and as shown in fig. 6, the inner surface of the spar cap 22b has a reinforcing layer connected with the leading edge module 21 and the trailing edge module 23. It should be noted that the thickness of the spar cap 22b is greater than the thickness of the leading edge module 21 and the trailing edge module 23, and by this arrangement, the reinforcing layer can function not only to connect the leading edge module 21, the trailing edge module 23 and the spar cap 22b, but also to connect with the inclined surface, thereby further improving the fixing reliability of the spar cap 22b in the vertical direction.

Example two

As shown in fig. 7 and 8, in a second form of the structure of the spar cap 22b of the present invention, the structures and the connection forms of other parts are the same as those of the first embodiment, and are not described herein again, and in this embodiment, the inclined surface of the spar cap 22b is disposed in a flaring shape toward the inside. As shown in fig. 8, the flare-like arrangement means that the length of the outer surface in the width direction is smaller than the length of the inner surface in the width direction on the cross section of the spar cap 22 b; through the flaring-shaped arrangement, when the front edge module 21 and the rear edge module 23 are subjected to extrusion force, the force can be transmitted towards the interior of the main girder box module 22 through the inclined surface, so that the pressure is transferred to the supporting force of the web plate 22a, and the compressive strength of the wind power blade is improved;

meanwhile, in order to further improve the connection strength of the spar cap 22b with the leading edge module 21 and the trailing edge module 23, as shown in fig. 8, the outer surfaces of the leading edge module 21, the trailing edge module, and the spar cap 22b are connected by a reinforcing layer. The reinforcing layer here is similar to the reinforcing layer 22b1 in the above structure, and the connecting area between the two is enlarged by means of the layer-laying fabric, so as to improve the connecting strength.

EXAMPLE III

As shown in fig. 9 and 10, in order to further improve the connection strength of the spar cap 22b, in a third embodiment of the present invention, the spar cap 22b in the second embodiment is modified, specifically: the inclined surface of the spar cap 22b is formed in two sections in a shape that is flared first and then constricted, and the contact point of the inside surfaces of the leading edge module 21 and the trailing edge module 23 is a boundary point. Through the arrangement, the whole pressure resistance of the wind power blade can be improved, and a foundation is provided for improving the connection strength of the main beam cap 22b through the arrangement of the inner side necking;

as shown in FIG. 10, the inboard and outboard sides of the spar cap 22b each have a reinforcing layer attached to the leading edge module 21 and the trailing edge module 23. Through the setting of inboard throat form inclined plane for being connected leading edge module 21 and girder cap 22b and trailing edge module 23 provides more smooth-going transition to being connected of girder cap 22b through the fabric, like this, all connect through the enhancement layer in the inboard and the outside of girder cap 22b, make girder box module 22's tensile strength further obtain improving.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a modularization wind-powered electricity generation blade connection structure, its characterized in that, this wind-powered electricity generation blade include root of leaf portion, leaf middle part and leaf point portion along length direction's blade main part, leaf middle part is along leading edge module, girder case module and the trailing edge module that connects gradually on its width direction, wherein:

2. The modular wind blade connection structure according to claim 1, wherein the joints between the two ends of the web and the main beam caps are bent, so that the bent side faces are attached to the inner walls of the main beam caps.

3. The modular wind blade connection structure according to claim 2, wherein the two webs are bent toward each other.

4. The modular wind blade connection structure according to claim 2, wherein a reinforcement layer is further arranged on the inner wall of the main beam cap, and the reinforcement layer is connected with the bent part of the web plate in a covered manner.

5. The modular wind blade connection according to any one of claims 1 to 4, wherein the inclined surface of the spar cap is inwardly necked.

6. The modular wind blade attachment structure of claim 5 wherein the spar cap inner surface has a reinforcement layer attached to the leading edge module and the trailing edge module.

7. The modular wind blade connection according to any one of claims 1 to 4, wherein the inclined face of the spar cap flares inwardly.

8. The modular wind blade connection structure of claim 7 wherein the outer surfaces of the leading edge module, trailing beam module and spar cap are connected by a stiffener.

9. The modular wind blade connection structure according to any one of claims 1 to 4, wherein the inclined surface of the spar cap is divided into two sections, and the two sections are arranged in a shape of flaring and necking, and the contact position of the inner side surfaces of the front edge module and the rear edge module is taken as a boundary point.

10. The modular wind blade connection structure of claim 9 wherein the spar caps have reinforcing layers on both the inboard and outboard sides that connect to the leading edge modules and the trailing edge modules.