CN112761866B

CN112761866B - Segmented blade structure and wind power generation equipment

Info

Publication number: CN112761866B
Application number: CN202110095355.3A
Authority: CN
Inventors: 张干
Original assignee: Sany Renewable Energy Co Ltd
Current assignee: Sany Renewable Energy Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2022-05-03
Anticipated expiration: 2041-01-25
Also published as: CN112761866A

Abstract

The embodiment of the invention provides a segmented blade structure and wind power generation equipment, and relates to the technical field of wind power generation equipment. The segmented blade structure provided by the embodiment of the invention comprises a blade tip segment, a blade root segment, a first connecting piece and a second connecting piece. The second connecting piece is arranged opposite to the first connecting piece, and two ends of the second connecting piece are fixedly connected with the blade tip section and the blade root section respectively. The first connecting piece comprises a first connecting plate, a second connecting plate and a first connecting beam. First connecting plate and second connecting plate set up the both ends at first tie-beam relatively to form "worker" font structure, so form first joint groove and second joint groove respectively through first connecting plate and second connecting plate in the both sides of first tie-beam. First joint groove is located to one side lateral wall card of leaf point section, and the second joint groove is located to one side lateral wall card of root of leaf section, and leaf point section and root of blade section are firmly connected with first connecting piece respectively, and connection stability is good, helps guaranteeing the bulk strength after connecting.

Description

Sectional blade structure and wind power generation equipment

Technical Field

The invention relates to the technical field of wind power generation equipment, in particular to a segmented blade structure and wind power generation equipment.

Background

Wind power generation refers to converting wind energy into electric energy, and at present, wind power generation equipment is provided with windmill blades, so that the windmill blades are driven by wind power to rotate so as to drive a generator to generate power, and the blades are one of important parts of the wind power generation equipment.

Along with the power of wind generating set promotes, the length of blade also constantly increases, and the length increase of blade not only leads to the promotion of the manufacturing degree of difficulty, also gives the degree of difficulty that the transportation of blade increases simultaneously. In order to improve the problem, when the blade with longer length is produced, the blade is arranged in sections and assembled and spliced into a whole in use. However, the existing sectional type blade is poor in connection stability after being connected and poor in overall strength.

Disclosure of Invention

The invention aims to provide a segmented blade structure, which can solve the technical problems of poor connection stability and poor overall strength of the segmented blade in the prior art.

The invention also aims to provide wind power generation equipment which can solve the technical problems of poor connection stability and poor overall strength of the sectional type blades in the prior art.

Embodiments of the invention may be implemented as follows:

an embodiment of the present invention provides a segmented blade structure, which includes a tip segment, a root segment, a first connector and a second connector; the first connecting piece comprises a first connecting plate, a second connecting plate and a first connecting beam, the first connecting plate and the second connecting plate are oppositely arranged at two ends of the first connecting beam so as to form a first clamping groove and a second clamping groove between the first connecting plate and the second connecting plate, and the first clamping groove and the second clamping groove are respectively positioned at two sides of the first connecting beam; the side wall of the blade tip section is clamped in the first clamping groove, and the first connecting plate and the second connecting plate are fixedly connected with the blade tip section; the side wall of the blade root section is clamped in the second clamping groove, and the first connecting plate and the second connecting plate are fixedly connected with the blade root section; the second connecting piece is located the leaf point section with the leaf root section is kept away from one side of first connecting piece, just the both ends of second connecting piece respectively with leaf point section with the blade root section fixed connection.

Optionally, the outer wall of the blade tip section is provided with a first blade tip reinforcing groove, the outer wall of the blade root section is provided with a first blade root reinforcing groove, the two ends of the first connecting plate are respectively accommodated in the first blade tip reinforcing groove and the first blade root reinforcing groove, and the outer wall of the first connecting plate, the outer wall of the blade tip section and the outer wall of the blade root section are in smooth transition.

Optionally, the bottom of the first blade tip reinforcing groove is a curved surface, and the bottom of the first blade root reinforcing groove is a curved surface; the inner wall of the first connecting plate is simultaneously attached to the groove bottom of the first tip reinforcing groove and the groove bottom of the first root reinforcing groove.

Optionally, the segmented blade structure further comprises a pneumatic outer piece, and the pneumatic outer piece is fixedly connected to the outer sides of the first connecting plate and the second connecting plate.

Optionally, the width of the first tip stiffening groove increases along the direction in which the tip section approaches the first connecting beam; and/or the presence of a gas in the gas,

and the width of the first blade root reinforcing groove is increased along the direction that the blade root section is close to the first connecting beam.

Optionally, the segmented vane structure further comprises a first locking member and a second locking member; the first locking member simultaneously cooperates with the tip segment, the first connecting plate and the second connecting plate to secure the tip segment to the first connecting plate and the second connecting plate; the second retaining member simultaneously cooperates with the blade root section, the first connecting plate and the second connecting plate so that the blade root section is fixed with the first connecting plate and the second connecting plate.

Optionally, the pressure surface of the blade tip section is clamped in the first clamping groove; the pressure surface of the blade root section is clamped in the second clamping groove.

Optionally, the second connecting member includes a third connecting plate, a fourth connecting plate and a second connecting beam, the third connecting plate and the fourth connecting plate are oppositely disposed at two ends of the first connecting beam, so as to form a third clamping groove and a fourth clamping groove between the third connecting plate and the fourth connecting plate, and the third clamping groove and the fourth clamping groove are respectively located at two sides of the second connecting beam; the suction surface of the blade tip section is clamped in the third clamping groove, and the third connecting plate and the fourth connecting plate are fixedly connected with the blade tip section; the suction surface of the blade root section is clamped in the fourth clamping groove, and the third connecting plate and the fourth connecting plate are fixedly connected with the blade root section.

Optionally, the suction surface of leaf point section is provided with second leaf point reinforcement groove, the suction surface of leaf root section is provided with second leaf root reinforcement groove, the both ends of fourth connecting plate hold respectively in second leaf point reinforcement groove with second leaf root reinforcement groove, just the outer wall of fourth connecting plate the suction surface of leaf point section and the suction surface smooth transition of leaf root section.

Embodiments of the present invention also provide a wind power plant comprising a segmented blade structure. The segmented blade structure comprises a blade tip section, a blade root section, a first connecting piece and a second connecting piece; the first connecting piece comprises a first connecting plate, a second connecting plate and a first connecting beam, the first connecting plate and the second connecting plate are oppositely arranged at two ends of the first connecting beam so as to form a first clamping groove and a second clamping groove between the first connecting plate and the second connecting plate, and the first clamping groove and the second clamping groove are respectively positioned at two sides of the first connecting beam; the side wall of the blade tip section is clamped in the first clamping groove, and the first connecting plate and the second connecting plate are fixedly connected with the blade tip section; the side wall of the blade root section is clamped in the second clamping groove, and the first connecting plate and the second connecting plate are fixedly connected with the blade root section; the second connecting piece is located the leaf point section with the leaf root section is kept away from one side of first connecting piece, just the both ends of second connecting piece respectively with leaf point section with the blade root section fixed connection.

The beneficial effects of the sectional blade structure and the wind power generation equipment of the embodiment of the invention include, for example:

embodiments of the present invention provide a segmented blade structure that includes a tip segment, a root segment, a first connector, and a second connector. The second connecting piece is positioned on one side of the blade tip section and the blade root section, which is far away from the first connecting piece, and two ends of the second connecting piece are respectively fixedly connected with the blade tip section and the blade root section. The first connecting piece comprises a first connecting plate, a second connecting plate and a first connecting beam. First connecting plate and second connecting plate set up the both ends at first tie-beam relatively to form "worker" font structure, so form first joint groove and second joint groove respectively through first connecting plate and second connecting plate in the both sides of first tie-beam. The lateral wall card of one side of apex section is located first joint groove, and first connecting plate and second connecting plate are located the inside and outside both sides of this lateral wall respectively promptly, and first connecting plate and second connecting plate all are in apex section fixed connection simultaneously, so with apex section fixed connection in first connecting piece, and the firm in connection, the stability of apex section and first connecting piece are good. The second joint groove is located to one side lateral wall card of root of blade section, and first connecting plate and second connecting plate are located the inside and outside both sides of this lateral wall respectively promptly, and first connecting plate and second connecting plate all with root section fixed connection, so with root section fixed connection in first connecting piece, and root section and first connecting piece firm in connection, stability are good. The blade root section and the blade tip section are connected through the stable connection of the blade root section and the blade tip section with the first connecting section and the fixed connection of the blade root section and the blade tip section with the second connecting section, and the whole strength of the connected segmented blade structure is guaranteed.

Embodiments of the present invention also provide a wind power plant comprising a segmented blade structure as described above. Since the split power plant includes the segmented blade structure described above, it also has all the benefits of the segmented blade structure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a segmented vane structure provided in an embodiment of the present invention;

FIG. 2 is a partial schematic structural view of a segmented vane structure provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2;

FIG. 4 is a schematic cross-sectional view of a first connection member of a segmented vane construction according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a tip section of a segmented vane structure provided in accordance with an embodiment of the present invention.

Icon: 100-segmented blade configuration; 110-tip section; 111-a first housing; 112-a second housing; 113-a first tip stiffening slot; 120-leaf root segment; 121-a third housing; 122-a fourth housing; 123-a first root reinforcement groove; 130-a first connector; 131-a first connection plate; 132-a second connecting plate; 133-a first connecting beam; 134-a first snap groove; 135-a second snap groove; 136-a first counterbore; 137-second counter sink; 140-a second connector; 141-a third connecting plate; 142-a fourth connecting plate; 143-a second connecting beam; 151-first pneumatic outer; 152-a second pneumatic profile; 160-main beam area.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic structural view of a segmented blade structure 100 provided in this embodiment, fig. 2 is a schematic partial structural view of the segmented blade structure 100 provided in this embodiment, fig. 3 is a schematic sectional structure view at a position iii-iii in fig. 2, and fig. 4 is a schematic sectional structural view of a first connecting member 130 in the segmented blade structure 100 provided in this embodiment. Referring to fig. 1-4 in combination, the present embodiment provides a segmented blade structure 100 and, accordingly, a wind power plant (not shown).

The wind power generation equipment comprises a segmented blade structure 100 and a generator, wherein the segmented blade structure 100 is in transmission connection with the generator, and when the wind power generation equipment is used, the segmented blade structure 100 is pushed to rotate under the action of wind force, so that the generator is driven to operate through the segmented blade structure 100.

The segmented blade structure 100 includes a tip segment 110, a root segment 120, a first connection 130, and a second connection 140. The second connecting member 140 is located at a side of the tip section 110 and the root section 120 away from the first connecting member 130, and two ends of the second connecting member 140 are fixedly connected to the tip section 110 and the root section 120, respectively. The first connecting member 130 includes a first connecting plate 131, a second connecting plate 132, and a first connecting beam 133. The first and

second connection plates

131 and 132 are oppositely disposed at both ends of the first connection beam 133 to form an "i" shaped structure, so that the first and second

catching grooves

134 and 135 are formed at both sides of the first connection beam 133 by the first and

second connection plates

131 and 132, respectively. The side wall of one side of the blade tip section 110 is clamped in the first clamping groove 134, that is, the first connecting plate 131 and the second connecting plate 132 are respectively located at the inner side and the outer side of the side wall, and meanwhile, the first connecting plate 131 and the second connecting plate 132 are both fixedly connected with the blade tip section 110, so that the blade tip section 110 is fixedly connected to the first connecting member 130, and the blade tip section 110 is firmly connected with the first connecting member 130, and the stability is good. The second clamping groove 135 is clamped in the side wall of the blade root section 120, that is, the first connecting plate 131 and the second connecting plate 132 are respectively located at the inner side and the outer side of the side wall, and the first connecting plate 131 and the second connecting plate 132 are both fixedly connected with the blade root section 120, so that the blade root section 120 is fixedly connected with the first connecting member 130, and the blade root section 120 is firmly connected with the first connecting member 130, and has good stability. The connection between the root section 120 and the tip section 110 is realized through the stable connection between the root section 120 and the tip section 110 and the first connection section, and the fixed connection between the root section 120 and the tip section 110 and the second connection section, which is helpful to ensure the overall strength of the segmented blade structure 100 after the connection.

It should be noted that, in the description of the present embodiment, "root" and "tip" represent relative positions of two segments in the segmented blade structure 100, and do not limit the overall position of the segments in the blade, that is, the root segment 120 is a segment disposed close to the root relative to the tip segment 110, and the tip segment 110 is a segment disposed close to the tip relative to the root segment 120. When the blade is formed by splicing two sections, the segmented blade structure 100 is the whole blade, and when the blade is formed by splicing at least three sections, the segmented blade structure 100 is a structure formed by connecting two adjacent sections of the blade.

The segmented vane structure 100 provided in the present embodiment is further described below:

fig. 5 is a schematic structural diagram of a tip section 110 of the segmented vane structure 100 provided in the present embodiment. Referring to fig. 1 to fig. 5, in the present embodiment, the blade tip section 110 includes a first shell 111 and a second shell 112 connected to each other, one end of the first shell 111 of the blade tip section 110 is clamped in the first clamping groove 134 of the first connecting member 130, and the first connecting plate 131 and the second connecting plate 132 are located on the inner side and the outer side of the first shell 111; the blade root section 120 includes a third shell 121 and a fourth shell 122 connected to each other, and one end of the third shell 121 of the blade root section 120 is clamped in the second clamping groove of the first connecting member 130, that is, the first connecting plate 131 and the second connecting plate 132 are respectively located at the inner side and the outer side of the third shell 121.

Further, the segmented vane structure 100 further comprises a first locking member (not shown) and a second locking member (not shown), the first locking member simultaneously cooperating with the tip segment 110, the first connecting plate 131 and the second connecting plate 132 to fix the tip segment 110 with the first connecting plate 131 and the second connecting plate 132. The second locking member simultaneously cooperates with the blade root segment 120, the first connecting plate 131 and the second connecting plate 132 to secure the blade root segment 120 with the first connecting plate 131 and the second connecting plate 132. Specifically, the first locking member is a bolt, which is sequentially disposed through the first connecting plate 131, the first housing 111, and the second connecting plate 132 to lock and fix the first connecting plate 131, the first housing 111, and the second connecting plate 132. The second locking member is a bolt which is sequentially disposed through the first connecting plate 131, the third housing 121 and the second connecting plate 132 to lock and fix the first connecting plate 131, the third housing 121 and the second connecting plate 132.

Referring to fig. 1 to fig. 5, in the present embodiment, the segmented blade structure 100 further includes a second connection element 140, the second connection element 140 is located on the blade tip section 110 and one side of the blade root section 120 away from the first connection element 130, and two ends of the second connection element 140 are respectively and fixedly connected to the blade root section 120 and the blade tip section 110. Specifically, two ends of the second connecting member 140 are respectively connected to the second housing 112 and the fourth housing 122, and the blade tip section 110 and the blade root section 120 are stably connected by the simultaneous action of the first connecting member 130 and the second connecting member 140. Optionally, the first connecting member 130 is made of metal or glass fiber reinforced plastic, and the second connecting member 140 is made of metal or glass fiber reinforced plastic.

Optionally, the second connecting member 140 includes a third connecting plate 141, a fourth connecting plate 142 and a second connecting beam 143, the third connecting plate 141 and the fourth connecting plate 142 are oppositely disposed at two ends of the first connecting beam 133 to form a third clamping groove and a fourth clamping groove between the third connecting plate 141 and the fourth connecting plate 142, the third clamping groove and the fourth clamping groove are respectively located at two sides of the second connecting beam 143, that is, the third connecting plate 141, the fourth connecting plate 142 and the second connecting beam 143 are connected to each other to form an "i" shaped member. One end of the second casing 112 of the blade tip section 110 is clamped in the third clamping groove, that is, the third connecting plate 141 and the fourth connecting plate 142 are respectively located at the inner side and the outer side of the second casing 112, and the second casing 112 is fixedly connected with the third connecting plate 141 and the fourth connecting plate 142. One end of the fourth shell 122 of the blade root section 120 is clamped in the fourth clamping groove, that is, the third connecting plate 141 and the fourth connecting plate 142 are respectively located at the inner side and the outer side of the fourth shell 122, and the fourth shell 122 is simultaneously and fixedly connected with the third connecting plate 141 and the fourth connecting plate 142. It is understood that in other embodiments, the second connecting member 140 may be configured as required, for example, the second connecting member 140 is configured to include only the third connecting plate 141 or the fourth connecting plate 142.

Optionally, the segmented blade structure 100 further comprises a third retaining member (not shown) and a fourth retaining member (not shown). The third locking member sequentially penetrates through the third connecting plate 141, the second shell 112 and the fourth connecting plate 142 to lock and fix the third connecting plate 141, the second shell 112 and the fourth connecting plate 142. Specifically, the third locking member is a bolt. The fourth locking member sequentially penetrates through the third connecting plate 141, the fourth shell 122 and the fourth connecting plate 142 to lock and fix the third connecting plate 141, the fourth shell 122 and the fourth connecting plate 142. Specifically, the fourth locking member is a bolt.

In the present embodiment, the pressure surface of the tip section 110 is clamped in the first clamping groove 134, and the pressure surface of the root section 120 is clamped in the second clamping groove 135. Specifically, the pressure surface (PS surface) of the tip section 110 is the outer wall surface of the first casing 111, and the pressure surface (PS surface) of the root section 120 is the outer wall surface of the third casing 121. Accordingly, the suction surface (SS surface) of the blade tip section 110 is an outer wall surface of the second casing 112, the suction surface (SS surface) of the blade root section 120 is an outer wall surface of the fourth casing 122, that is, the suction surface of the blade tip section 110 is clamped in the third clamping groove, and the suction surface of the blade root section 120 is clamped in the fourth clamping groove.

Referring to fig. 1 to fig. 5, in the present embodiment, a first tip reinforcing groove 113 is formed in an outer wall of the tip section 110, a first root reinforcing groove 123 is formed in an outer wall of the root section 120, and two ends of the first connecting plate 131 are respectively accommodated in the first tip reinforcing groove 113 and the first root reinforcing groove 123, that is, the first tip reinforcing groove 113 is formed in a pressure surface of the tip section 110, and the first root reinforcing groove 123 is formed in a pressure surface of the root section 120. The first connection plate 131 is located at the outer side of the tip section 110 and the root section 120, and both ends of the first connection plate 131 are located in the first root stiffening groove 123 and the second root stiffening groove, respectively. The smooth transition of the outer wall of the first connecting plate 131, the outer wall of the tip section 110 and the outer wall of the root section 120, i.e. the smooth transition of the outer wall of the first connecting plate 131 with the pressure surface of the root section 120 and the pressure surface of the tip section 110, contributes to the improvement of the aerodynamic performance of the segmented blade structure 100.

Further, the bottom of the first tip stiffening groove 113 is a curved surface, and the bottom of the first root stiffening groove 123 is a curved surface. The inner wall of the first connecting plate 131 is simultaneously attached to the bottom of the first tip reinforcing groove 113 and the bottom of the first root reinforcing groove 123, that is, the inner wall of the first connecting plate 131 is a curved surface adapted to the bottom of the first tip reinforcing groove 113 and the bottom of the second root reinforcing groove. Specifically, the first tip stiffening groove 113 is located in the main beam region 160 of the tip section 110, the radian of the bottom of the first tip stiffening groove 113 is the same as the pressure surface of the tip section 110, and the portion of the first connecting plate 131 located in the first tip stiffening groove 113 is a plate with the same thickness at each position. The first root stiffening groove 123 is located in the main beam region 160 of the root section 120, the radian of the bottom of the first root stiffening groove 123 is the same as the pressure surface of the root section 120, and the portion of the first connecting plate 131 located in the first tip stiffening groove 113 is a plate with the same thickness at each position. Further, the second connecting plate 132 is attached to the inner wall of the first housing 111 and the inner wall of the third housing 121, that is, the second connecting plate 132 is a curved plate adapted to the inner wall of the first housing 111 and the inner wall of the third housing 121.

A plurality of first bolt holes are formed in the groove bottom of the first blade tip reinforcing groove 113, metal bolt sleeves are embedded in the first bolt holes, and the first locking piece is connected with the metal bolt sleeves. The first connecting plate 131 is provided with a plurality of first counter-sunk holes 136 for the first locking member to pass through. A plurality of second bolt holes are formed in the bottom of the first blade root reinforcing groove 123, metal bolt sleeves are embedded in the second bolt holes, and the second locking piece is connected with the metal bolt sleeves. The first connecting plate 131 is provided with a plurality of second counter sink holes 137 for the second locking members to pass through.

Further, in the direction that the tip section 110 approaches the first connection beam 133, the width of the first tip reinforcing slot 113 is increased, so as to increase the area of the connection surface between the first connection element 130 and the tip section 110, which helps to ensure that the connection between the first connection element 130 and the tip section 110 is fastened. Specifically, the first tip reinforcing groove 113 is a trapezoid having a bottom side facing the cross section of the tip section 110. Further, along the direction that the blade root section 120 is close to the first connecting beam 133, the width of the first blade root reinforcing groove 123 is increased, so that the area of the connecting surface of the first connecting piece 130 and the blade root section 120 is increased, and the first connecting piece 130 and the blade root section 120 are favorably ensured to be connected and fastened. Specifically, the first root stiffening groove 123 is a trapezoid with a base facing the end surface of the root section 120.

Referring to fig. 1 to 5, in the present embodiment, the suction surface of the blade tip section 110 is provided with a second blade tip reinforcing groove, and the suction surface of the blade root section 120 is provided with a second blade root reinforcing groove. Both ends of the fourth connecting plate 142 are respectively accommodated in the second tip reinforcing groove and the second root reinforcing groove, and the outer wall of the fourth connecting plate 142, the suction surface of the tip section 110, and the suction surface of the root section 120 are in smooth transition. Specifically, the shape of the second blade tip stiffening groove is substantially the same as the shape of the first blade tip stiffening groove 113, the shape of the second blade root stiffening groove is substantially the same as the shape of the first blade root stiffening groove 123, and the structure of the second connecting member 140 is substantially the same as the structure of the first connecting member 130, so that the structure of the second connecting member 140 connected to the second shell 112 and the fourth shell 122 is substantially the same as the structure of the first connecting member 130 connected to the first shell 111 and the third shell 121, and the description thereof is omitted.

Referring to fig. 1, in the present embodiment, the segmented blade structure 100 further includes an aerodynamic profile having an aerodynamic shape, and the aerodynamic profile is fixedly connected to the outer sides of the first connecting plate 131 and the second connecting plate 140. Specifically, the number of the aerodynamic profiles is two, the two aerodynamic profiles are respectively a first aerodynamic profile 151 and a second aerodynamic profile 152, the first aerodynamic profile 151 is adhesively fixed on the outer side of the first connecting plate 131, and thus the joint of the first connecting plate 131 with the blade root section 120 and the blade tip section 110 is covered by the first aerodynamic profile 151. The second actuating profile is adhesively fastened to the outside of the fourth connecting plate 142, so that the connection of the fourth connecting plate 142 to the root section 120 and the tip section 110 is covered by the second actuating profile. Thereby ensuring the aerodynamic performance of the segmented vane structure 100 as a whole.

Optionally, the pneumatic outer part is a part with a pneumatic shape, which is made of glass fiber cloth in advance, and the number of layers of the glass fiber cloth can be set according to requirements. When in use, the pneumatic profile is bonded to the outer sides of the first connecting plate 131 and the fourth connecting plate 142. It is understood that in other embodiments, the glass fiber waves may be directly attached to the outer sides of the first connecting plate 131 and the fourth connecting plate 142.

The present embodiment provides a segmented blade structure 100 having at least the following advantages:

in the segmented blade structure 100 provided by the embodiment of the invention, the blade tip section 110 and the blade root section 120 are connected by two i-shaped connectors, and meanwhile, the side walls at two sides of the blade tip section 110 and the blade root section 120 are respectively clamped in the first connector 130 and the second connector 140, so that the reliable connection and the strength of the blade tip section 110 and the blade root section 120 are ensured. And because the first connecting piece 130 and the second connecting piece 140 are arranged in a split manner to respectively realize the connection of the pressure surface and the suction surface of the blade tip section 110 and the pressure surface and the suction surface of the blade root section 120, the weight of the segmented blade structure 100 after connection is reduced, and the length of the bolt is less than half of the thickness of the segmented blade structure 100, so that the length of the bolt is greatly reduced, and the unstable bending condition is avoided. In addition, the connection area of the segmented blade structure 100 is large, and the problem of stress concentration is not easily caused.

The present embodiment also provides a wind power plant comprising the segmented blade structure 100 described above, and thus also having all the benefits of the segmented blade structure 100.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A segmented blade structure, comprising a tip segment (110), a root segment (120), a first connector (130) and a second connector (140); the first connecting piece (130) comprises a first connecting plate (131), a second connecting plate (132) and a first connecting beam (133), the first connecting plate (131) and the second connecting plate (132) are oppositely arranged at two ends of the first connecting beam (133) so as to form a first clamping groove (134) and a second clamping groove (135) between the first connecting plate (131) and the second connecting plate (132), and the first clamping groove (134) and the second clamping groove (135) are respectively positioned at two sides of the first connecting beam (133); the side wall of the blade tip section (110) is clamped in the first clamping groove (134), and the first connecting plate (131) and the second connecting plate (132) are fixedly connected with the blade tip section (110); the side wall of the blade root section (120) is clamped in the second clamping groove (135), and the first connecting plate (131) and the second connecting plate (132) are fixedly connected with the blade root section (120); the second connecting piece (140) is located on one side, away from the first connecting piece (130), of the blade tip section (110) and the blade root section (120), and two ends of the second connecting piece (140) are fixedly connected with the blade tip section (110) and the blade root section (120) respectively.

2. The segmented blade structure of claim 1, wherein the outer wall of the tip section (110) is provided with a first tip stiffening groove (113), the outer wall of the root section (120) is provided with a first root stiffening groove (123), two ends of the first connecting plate (131) are respectively accommodated in the first tip stiffening groove (113) and the first root stiffening groove (123), and the outer wall of the first connecting plate (131), the outer wall of the tip section (110) and the outer wall of the root section (120) are in smooth transition.

3. The segmented blade structure of claim 2 wherein the bottom of the first tip stiffening groove (113) is curved and the bottom of the first root stiffening groove (123) is curved; the inner wall of the first connecting plate (131) is simultaneously attached to the bottom of the first tip reinforcing groove (113) and the bottom of the first root reinforcing groove (123).

4. The segmented blade structure of claim 2, wherein the segmented blade structure (100) further comprises a pneumatic profile fixedly connected to the outside of the first and second connection plates (131, 140).

5. The segmented blade structure of claim 2, wherein the first tip stiffening groove (113) increases in width in a direction of the tip segment (110) approaching the first connecting beam (133); and/or the presence of a gas in the gas,

the first root stiffening groove (123) increases in width in a direction of the root section (120) approaching the first connecting beam (133).

6. The segmented blade structure of claim 1, wherein said segmented blade structure (100) further comprises a first locking member and a second locking member; the first locking member simultaneously cooperates with the tip segment (110), the first connecting plate (131) and the second connecting plate (132) to fix the tip segment (110) with the first connecting plate (131) and the second connecting plate (132); the second locking member cooperates simultaneously with the blade root section (120), the first connecting plate (131) and the second connecting plate (132) to fix the blade root section (120) with the first connecting plate (131) and the second connecting plate (132).

7. The segmented vane structure as claimed in any one of claims 1-6, wherein the pressure surface of the tip segment (110) is clamped in the first clamping groove (134); the pressure surface of the blade root section (120) is clamped in the second clamping groove (135).

8. The segmented blade structure of claim 7, wherein the second connecting member (140) comprises a third connecting plate (141), a fourth connecting plate (142) and a second connecting beam (143), the third connecting plate (141) and the fourth connecting plate (142) are oppositely arranged at two ends of the first connecting beam (133) to form a third clamping groove and a fourth clamping groove between the third connecting plate (141) and the fourth connecting plate (142), and the third clamping groove and the fourth clamping groove are respectively positioned at two sides of the second connecting beam (143); the suction surface of the blade tip section (110) is clamped in the third clamping groove, and the third connecting plate (141) and the fourth connecting plate (142) are fixedly connected with the blade tip section (110); the suction surface card of root of leaf section (120) is located fourth joint groove, just third connecting plate (141) with fourth connecting plate (142) all with root of leaf section (120) fixed connection.

9. The segmented blade structure of claim 8, wherein the suction surface of the tip section (110) is provided with a second tip reinforcing groove, the suction surface of the root section (120) is provided with a second root reinforcing groove, the two ends of the fourth connecting plate (142) are respectively accommodated in the second tip reinforcing groove and the second root reinforcing groove, and the outer wall of the fourth connecting plate (142), the suction surface of the tip section (110) and the suction surface of the root section (120) are smoothly transited.

10. A wind power plant, characterized in that the wind power plant comprises a segmented blade structure (100) according to any of claims 1-9.