阅读说明：本技术 一种高连接强度的复材分段式风电叶片 (Composite sectional type wind power blade with high connection strength ) 是由 谈昆伦 季小强 杜秋萍 于 2021-09-18 设计创作，主要内容包括：本发明涉及风电设备技术领域,尤其涉及一种高连接强度的复材分段式风电叶片；包括叶根分段和叶尖分段,拼接后形成叶片体；叶根分段内设置有第一腹板；叶尖分段内设置有第二腹板；加强板,设置在第一腹板和第二腹板的两侧；每个加强板的两端分别与第一腹板和第二腹板贴合；连接板,设置在第一腹板和第二腹板两侧的顶端和底端；每个连接板均为“L”型,每个连接板一端的两个侧板分别与第一腹板和叶片体贴合,另一端的两个侧板分别与第二腹板和叶片体贴合；第一紧固件,用于连接加强板、连接板、第一腹板和第二腹板；第二紧固件,用于固定连接板和叶片体。本发明提供了一种高连接强度的复材分段式风电叶片,提高复材叶片分段间的连接强度。(The invention relates to the technical field of wind power equipment, in particular to a composite sectional type wind power blade with high connection strength; the blade comprises a blade root section and a blade tip section which are spliced to form a blade body; a first web plate is arranged in the blade root segment; a second web plate is arranged in the blade tip section; the reinforcing plates are arranged on two sides of the first web plate and the second web plate; two ends of each reinforcing plate are respectively attached to the first web plate and the second web plate; the connecting plates are arranged at the top ends and the bottom ends of the two sides of the first web plate and the second web plate; each connecting plate is L-shaped, two side plates at one end of each connecting plate are respectively attached to the first web plate and the blade body, and two side plates at the other end of each connecting plate are respectively attached to the second web plate and the blade body; the first fastener is used for connecting the reinforcing plate, the connecting plate, the first web plate and the second web plate; and the second fastener is used for fixing the connecting plate and the blade body. The invention provides a composite sectional type wind power blade with high connection strength, which improves the connection strength between composite blade sections.)

1. The utility model provides a high joint strength's compound material sectional type wind-powered electricity generation blade which characterized in that includes:

the blade root section (1) and the blade tip section (2) are spliced to form a blade body;

a vertical first web plate (11) is arranged in the blade root segment (1);

a vertical second web plate (21) is arranged in the blade tip section (2), and after the blade body is formed, the end surface of the second web plate (21) is abutted against the end surface of the first web plate (11);

reinforcing plates (3) provided on both sides of the first web (11) and the second web (21); one end of each reinforcing plate (3) is attached to the side wall of the first web plate (11), and the other end of each reinforcing plate is attached to the side wall of the second web plate (21);

the connecting plates (4) are arranged at the top end and the bottom end of two sides of the first web plate (11) and the second web plate (21); each connecting plate (4) is L-shaped, two side plates at one end of each connecting plate (4) are respectively attached to the first web plate (11) and the inner wall of the blade body, and two side plates at the other end of each connecting plate are respectively attached to the second web plate (21) and the inner wall of the blade body;

a first fastener (5) for integrally connecting the reinforcing plate (3), the connecting plate (4), the first web (11) and the second web (21);

and the second fastening piece (6) is used for integrally connecting the connecting plate (4) and the blade body.

2. The high-connection-strength composite material segmented wind power blade according to claim 1, wherein a triangular reinforcing rib plate (41) is arranged in the middle section of the connecting plate (4).

3. The high-connection-strength composite material segmented wind power blade is characterized in that a first embedded beam (12) is arranged in the blade root segment (1), and the first web plate (11) is arranged at the first embedded beam (12); set up second pre-buried roof beam (22) in apex segmentation (2), second web (21) set up second pre-buried roof beam (22) department.

4. The high-connection-strength composite material segmented wind power blade is characterized in that the first webs (11) are arranged in a plurality and are spaced from each other, and one of the first webs (11) is arranged at the first embedded beam (12); the second web (21) is provided with a plurality of, and corresponds the quantity and the position of first web (11) set up, a plurality of one of second web (21) sets up second pre-buried roof beam (22) department.

5. The high connection strength composite material segmented wind power blade according to claim 4, wherein the blade root segment (1) is provided with a plurality of first thickened blocks (13), and each of the other first webs (11) is provided at a corresponding one of the first thickened blocks (13); the blade tip segment (2) is provided with a plurality of second thickening blocks (23), and each of the other second webs (21) is arranged at one corresponding second thickening block (23).

6. The high-connection-strength composite material segmented wind power blade according to claim 5, wherein the second fastening piece (6) is arranged at the first embedded beam (12), the second embedded beam (22), the first thickened block (13) and the second thickened block (23).

7. The high-connection-strength composite material segmented wind power blade is characterized in that the top and/or the bottom of the first web (11) is provided with a first extension plate (14), the first extension plate (14) extends into the joint of the connecting plate (4) and the blade body, and is integrally connected with the connecting plate (4) and the blade body through the second fastening piece (6).

8. The high-connection-strength composite material segmented wind power blade is characterized in that the top and/or the bottom of the second web (21) is/are provided with a second extension plate (24), the second extension plate (24) extends into the joint of the connecting plate (4) and the blade body, and is integrally connected with the connecting plate (4) and the blade body through the second fastener (6).

9. The high-connection-strength composite material segmented wind power blade according to claim 1, wherein the blade root segment (1), the blade tip segment (2), the first web (11), the second web (21), the reinforcing plate (3) and the connecting plate (4) are provided with metal pre-buried holes or metal screw sleeves for inserting the first fastener (5) and the second fastener (6).

10. The high-connection-strength composite material segmented wind power blade according to any one of claims 1 to 9, wherein an end face of one end of the first web (11) is arranged on the inner side of the blade root segment (1) and is spaced from the end face of the blade root segment (1); the end surface of one end of the second web plate (21) extends to the outer side of the blade tip section (2); after the blade body is formed, the extending end of the second web (21) extends into the blade root section (1).

Technical Field

The invention relates to the technical field of wind power equipment, in particular to a composite sectional type wind power blade with high connection strength.

Background

Wind is an energy source without public nuisance. The wind power generator is very suitable for coastal islands, grassland pasturing areas, mountain areas and plateau areas with water shortage, fuel shortage and inconvenient traffic to utilize wind power to generate electricity according to local conditions. Wind power is an important field of renewable energy development, wind energy resources in China are abundant, the construction of wind power projects is accelerated, and the method has important significance for adjusting energy structures and changing economic development modes in China.

In the traditional wind driven generator, in order to fully utilize wind energy resources, the length of the blade is longer, so that the blade can be made into a sectional type for convenient transportation, each section is transported independently, and then the blades are spliced at an installation site. The blade manufactured by using the traditional metal has the disadvantages of heavy weight, large energy consumption and easy damage in the using process, so that the composite material with high strength and lighter weight is used for replacing the traditional metal material, such as glass fiber, carbon fiber or composite materials of carbon-glass mixture and the like. However, because the characteristic difference between the composite material and the metal material is large, the joint strength between the blade sections is poor due to the continuous use of the traditional splicing structure, and potential safety hazards are easily generated in the use process.

In view of the above problems, the designer designs a composite sectional type wind power blade with high connection strength based on practical experience and professional knowledge which are abundant for years in engineering application of such products and by cooperating with the application of theory and actively carrying out research and innovation, so as to improve the connection strength between the composite blade sections.

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

Disclosure of Invention

The invention aims to provide a composite sectional type wind power blade with high connection strength aiming at the defects in the prior art, and solves the problem of poor connection strength between sections of the composite sectional type wind power blade.

In order to achieve the purpose, the invention adopts the technical scheme that:

the method comprises the following steps: the blade root and the blade tip are segmented and spliced to form a blade body;

a vertical first web plate is arranged in the blade root segment;

a vertical second web plate is arranged in the blade tip section, and after the blade body is formed, the end face of the second web plate is abutted to the end face of the first web plate;

reinforcing plates disposed at both sides of the first web and the second web; one end of each reinforcing plate is attached to the side wall of the first web plate, and the other end of each reinforcing plate is attached to the side wall of the second web plate;

the connecting plates are arranged at the top ends and the bottom ends of the two sides of the first web plate and the second web plate; each connecting plate is L-shaped, two side plates at one end of each connecting plate are respectively attached to the first web plate and the inner wall of the blade body, and two side plates at the other end of each connecting plate are respectively attached to the second web plate and the inner wall of the blade body;

the first fastener is used for integrally connecting the reinforcing plate, the connecting plate, the first web plate and the second web plate;

and the second fastener is used for connecting the connecting plate and the blade body into a whole.

Furthermore, a triangular reinforcing rib plate is arranged at the middle section of the connecting plate.

Furthermore, a first embedded beam is arranged in the blade root segment, and the first web plate is arranged at the first embedded beam; and a second embedded beam is arranged in the blade tip segment, and the second web plate is arranged at the second embedded beam.

Furthermore, the first webs are arranged at intervals, and one of the first webs is arranged at the first embedded beam; the second web is provided with a plurality of, and corresponds the quantity and the position of first web set up, a plurality of one of the second web sets up second pre-buried roof beam department.

Furthermore, the blade root segment is provided with a plurality of first thickened blocks, and each of the other first webs is arranged at a corresponding first thickened block; the blade tip is provided with a plurality of second thickening blocks in a segmented mode, and each of the other second webs is arranged at one corresponding second thickening block.

Further, the second fastener is arranged at the first embedded beam, the second embedded beam, the first thickening block and the second thickening block.

Furthermore, the top and/or the bottom of the first web plate are/is provided with a first extension plate, the first extension plate extends into the joint of the connecting plate and the blade body, and is connected with the connecting plate and the blade body into a whole through the second fastener.

Furthermore, the top and/or the bottom of the second web plate are/is provided with second extension plates, and the second extension plates extend into the joint of the connecting plate and the blade body and are connected with the connecting plate and the blade body into a whole through the second fasteners.

Furthermore, the blade root segment, the blade tip segment, the first web, the second web, the reinforcing plate and the connecting plate are all provided with metal pre-buried holes or metal thread sleeves for inserting the first fasteners and the second fasteners.

Further, the end surface of one end of the first web is arranged on the inner side of the blade root segment and forms a gap with the end surface of the blade root segment; the end surface of one end of the second web plate extends to the outer side of the blade tip section; after the blade body is formed, the extending end of the second web plate extends into the blade root section.

Through the technical scheme of the invention, the following technical effects can be realized:

the high joint strength's compound material sectional type wind-powered electricity generation blade of design through reinforcing plate and the connecting plate that sets up all to be connected with first web and second web, realizes that blade root segmentation and apex segmentation can assemble conveniently, can pass power through first web and second web simultaneously, and does not pass power through the connection of flange in the traditional structure, can effectively promote the joint strength between blade root segmentation and the apex segmentation. The reinforcing plate can carry out the structure reinforcement to the junction of first web and second web, when wind-powered electricity generation blade received the power back production dislocation trend of the first web of perpendicular to and second web, the reinforcing plate can restrain the whole vertical direction of first web and second web, promotes wind-powered electricity generation blade's anti-shear force's ability.

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 top view of a composite segmented wind turbine blade with high joint strength according to an embodiment of the present invention;

FIG. 2 is an exploded view of the structure of a composite sectional type wind power blade with high connection strength according to an embodiment of the invention;

FIG. 3 is a schematic view of a first embodiment of a blade root segment according to the present invention;

FIG. 4 is a schematic structural view of a tip segment of the first embodiment of the present invention;

FIG. 5 is a side view of a high bond strength composite segmented wind turbine blade according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken at A of the first embodiment of FIG. 5 in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken at point B of the first embodiment of FIG. 5 in accordance with an embodiment of the present invention;

FIG. 8 is an enlarged view of FIG. 7 at C in accordance with an embodiment of the present invention;

FIG. 9 is an enlarged view of FIG. 7 at D in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of a second embodiment blade root segment in accordance with an embodiment of the present invention;

FIG. 11 is a schematic structural view of a tip segment of a second embodiment of the present invention;

FIG. 12 is a cross-sectional view taken at A of the second embodiment of FIG. 5 in accordance with an embodiment of the present invention;

FIG. 13 is a cross-sectional view taken at point B of the second embodiment of FIG. 5 in accordance with an embodiment of the present invention;

FIG. 14 is an enlarged view at E of FIG. 13 in accordance with an embodiment of the present invention;

FIG. 15 is an enlarged view at F of FIG. 13 in accordance with an embodiment of the present invention;

reference numerals: the blade root segment 1, the first web 11, the first embedded beam 12, the first thickened block 13, the first extending plate 14, the blade tip segment 2, the second web 21, the second embedded beam 22, the second thickened block 23, the second extending plate 24, the reinforcing plate 3, the connecting plate 4, the reinforcing rib plate 41, the first fastener 5 and the second fastener 6.

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.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

a high joint strength's compound material sectional type wind-powered electricity generation blade, as shown in fig. 1~9, includes: the blade root section 1 and the blade tip section 2 are spliced to form a blade body; a vertical first web plate 11 is arranged in the blade root section 1; a vertical second web plate 21 is arranged in the blade tip section 2, and after the blade body is formed, the end surface of the second web plate 21 is abutted with the end surface of the first web plate 11; reinforcing plates 3 provided on both sides of the first web 11 and the second web 21; one end of each reinforcing plate 3 is attached to the side wall of the first web plate 11, and the other end of each reinforcing plate is attached to the side wall of the second web plate 21; the connecting plates 4 are arranged at the top end and the bottom end of two sides of the first web plate 11 and the second web plate 21; each connecting plate 4 is L-shaped, two side plates at one end of each connecting plate 4 are respectively attached to the first web plate 11 and the inner wall of the blade body, and two side plates at the other end are respectively attached to the second web plate 21 and the inner wall of the blade body; the first fastener 5 is used for integrally connecting the reinforcing plate 3, the connecting plate 4, the first web plate 11 and the second web plate 21; and the second fastening piece 6 is used for integrally connecting the connecting plate 4 and the blade body.

A first embedded beam 12 is arranged in the blade root section 1, and a first web plate 11 is arranged at the first embedded beam 12; a second embedded beam 22 is arranged in the blade tip segment 2, and a second web plate 21 is arranged at the second embedded beam 22.

In the embodiment, the first web 11 and the second web 21 are respectively arranged in the blade root section 1 and the blade tip section 2, and then the reinforcing plate 3 and the connecting plate 4 are connected in a way of being simultaneously attached to the first web 11 and the second web 21, so that the blade root section 1 and the blade tip section 2 can be conveniently assembled; the connection through the flange in traditional structure passes power, and the outside of compound material blade body is compound material covering, if follow the connection structure of traditional metal blade and lead to the covering to tear easily, seriously influence wind-powered electricity generation blade's security, and this structure is earlier through linking into an organic whole first web 11 and second web 21, and set up first web 11 and second web 21 in first pre-buried roof beam 12 and second pre-buried roof beam 22 department, and set up second fastener 6 in first pre-buried roof beam 12 and second pre-buried roof beam 22 department, make between blade root section 1 and the apex section 2 carry out through first web 11 and second web 21, first pre-buried roof beam 12 and second pre-buried roof beam 22, and do not participate in between the covering and pass power, can effectively promote the joint strength between blade root section 1 and the apex section 2.

The reinforcing plate 3 can structurally reinforce the joint of the first web 11 and the second web 21, as shown in fig. 7, after the wind turbine blade is subjected to a force F1 perpendicular to the first web 11 and the second web 21, a misalignment tendency can be generated, except that the connecting plate 4 can prevent misalignment by virtue of an "L" shaped structure, the reinforcing plate 3 can also restrain the whole vertical direction of the first web 11 and the second web 21, and the reinforcing plate 3 can averagely exert an acting force on the first web 11 and the second web 21 during restraining, so that the anti-shearing force capability of the wind turbine blade is improved.

In order to further improve the structural strength of the connecting plate 4, a triangular reinforcing rib plate 41 is arranged in the middle section of the connecting plate 4.

In order to improve the bending resistance of the blade root section 1 and the blade tip section 2, a plurality of first webs 11 are arranged at intervals, and a plurality of second webs 21 are also arranged and are arranged corresponding to the number and the positions of the first webs 11; at this time, one of the first webs 11 is arranged at the first embedded beam 12, one of the second webs 21 is arranged at the second embedded beam 22, and the other first webs 11 and second webs 21 are directly connected with the skin, so that in order to increase the strength of the skin connection, the blade root segment 1 needs to be provided with a plurality of first thickened blocks 13, and each of the other first webs 11 is arranged at a corresponding first thickened block 13; the tip segment 2 is provided with a plurality of second thickened blocks 23, each of the other second webs 21 is arranged at a corresponding second thickened block 23, and the second fastening piece 6 is arranged at the first thickened block 13 and the second thickened block 23.

The top and/or the bottom of the first web plate 11 is/are provided with a first extension plate 14, the first extension plate 14 extends into the joint of the connecting plate 4 and the blade body, and is connected with the connecting plate 4 and the blade body into a whole through a second fastener 6; the top and/or the bottom of the second web 21 is provided with a second extension plate 24, and the second extension plate 24 extends into the joint of the connecting plate 4 and the blade body and is connected with the connecting plate 4 and the blade body into a whole through a second fastener 6. This construction further improves the reliability of the connection between the blade root section 1 and the blade tip section 2.

Due to the particularity of the composite material, the strength of the composite material is easily damaged by drilling operation after the composite material is formed, so that metal pre-buried holes or metal thread sleeves are arranged on the blade root section 1, the blade tip section 2, the first web 11, the second web 21, the reinforcing plate 3 and the connecting plate 4, holes for inserting the first fastening piece 5 and the second fastening piece 6 and all parts can be formed simultaneously, and the structural strength of the parts is guaranteed. The first embedded beam 12 and the second embedded beam 22 are preferably embedded with metal thread sleeves, so that the weight is light and the connection effect is better.

Example 2:

a composite sectional wind power blade with high connection strength is shown in figures 5 and 10-15, and is different from embodiment 1 in that the end surface of one end of a first web plate 11 is arranged on the inner side of a blade root section 1 and forms a gap with the end surface of the blade root section 1; the end surface of one end of the second web 21 extends to the outer side of the blade tip section 2; after the blade body is formed, the extended end of the second web 21 extends into the blade root section 1.

In this embodiment, because the extending end of the second web 21 extends into the blade root segment 1, when the blade is subjected to a vertical force F2 shown in fig. 12 to generate a bending tendency, except that the connecting plate 4 can be prevented from being bent by virtue of an "L" shaped structure, the second web 21 can also abut against the upper end of the inner side of the blade root segment 1, and cooperates with the connecting plate 4 to eliminate the bending tendency, thereby further improving the bending resistance of the wind turbine blade at the connection position.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. 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 invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.