High-strength wind turbine blade structure

Abstract

This utility model discloses a high-strength wind turbine blade structure, including a wind turbine blade shell. A windward main beam is installed on the windward side of the wind turbine blade shell, and a leeward main beam is installed on the leeward side of the wind turbine blade shell. A leading edge web and a trailing edge web are provided between the windward and leeward main beams and along the length of the wind turbine blade shell. Several leading edge reinforcing frames that match the cross-section of the leading edge of the wind turbine blade shell are provided between the leading edge web and the leading edge of the wind turbine blade shell. The trailing edge reinforcing frames can support the trailing edge of the wind turbine blade, thereby reducing the pressure on the leading and trailing edge webs. At the same time, the leading and trailing edge reinforcing frames can support the leading and trailing edge webs respectively, preventing the leading and trailing edge webs from bending and deforming. This can prevent the wind turbine blade from breaking during wind farm operation, thus avoiding serious personal and property safety problems.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade technology, and in particular to a high-strength wind turbine blade structure. Background Technology

[0002] Wind turbine blades are key components of wind turbines, and their performance directly affects the overall operation and stability of the machine. Currently, with the increase in wind turbine blade size, the root pitch circle diameter has exceeded 4000 mm, and the blade weight exceeds 30 tons. The root of the wind turbine blade is highly susceptible to deformation after demolding, and the leading and trailing edge webs also bend and deform accordingly. When the leading or trailing edge webs bend and deform, the shear strength of the wind turbine blade is severely reduced, leading to breakage during wind farm operation and causing serious personal injury and property damage. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a high-strength wind turbine blade structure. This solves the technical problem that the leading or trailing edge web of wind turbine blades in the prior art is prone to bending and deformation, which severely reduces the shear strength of the wind turbine blades and causes them to break during wind farm operation, resulting in serious personal and property safety issues.

[0004] To achieve the above technical objectives, the present invention provides a high-strength wind turbine blade structure, including a wind turbine blade shell, a windward main beam installed on the windward side of the wind turbine blade shell, a leeward main beam installed on the leeward side of the wind turbine blade shell, a leading edge web and a trailing edge web provided between the windward and leeward main beams and along the length of the wind turbine blade shell, a plurality of leading edge reinforcing frames matching the cross-section of the leading edge of the wind turbine blade shell provided between the leading edge web and the leading edge of the wind turbine blade shell, and a plurality of trailing edge reinforcing frames matching the cross-section of the trailing edge of the wind turbine blade shell provided between the trailing edge web and the trailing edge of the wind turbine blade shell;

[0005] The leading edge reinforcement includes a first arc-shaped support rod that abuts against the inner wall of the leading edge of the wind turbine blade housing and a first straight support rod that abuts against the side of the leading edge web near the leading edge of the wind turbine blade housing. The two ends of the first straight support rod are respectively connected to the two ends of the first arc-shaped support rod, and the middle part of the first straight support rod and the middle part of the first arc-shaped support rod are respectively connected to the two ends of the second straight support rod.

[0006] The trailing edge reinforcement includes a second arc-shaped support rod that abuts against the inner wall of the windward side of the trailing edge of the wind turbine blade housing, a third arc-shaped support rod that abuts against the inner wall of the leeward side of the trailing edge of the wind turbine blade housing, and a third straight support rod that abuts against the side of the trailing edge web plate near the trailing edge of the wind turbine blade housing. The end of the second arc-shaped support rod away from the trailing edge web plate is connected to the end of the third arc-shaped support rod away from the trailing edge web plate. The ends of the second arc-shaped support rod and the third arc-shaped support rod near the trailing edge web plate are respectively connected to the two ends of the third straight support rod. The middle parts of the second arc-shaped support rod and the middle parts of the third arc-shaped support rod are respectively connected to the two ends of the fourth straight support rod. The middle parts of the fourth straight support rod and the middle parts of the third straight support rod are respectively connected to the two ends of the fifth straight support rod.

[0007] Furthermore, front edge web flanges are provided on both sides of the front edge web for bonding and fixing with the windward main beam and the leeward main beam, respectively.

[0008] Furthermore, the outer sides of both ends of the first arc-shaped support rod are provided with first arc-shaped slots, and the two front edge web flanges are respectively locked inside the two first arc-shaped slots.

[0009] Furthermore, the rear edge web plate has flange edges on both sides for bonding and fixing with the windward main beam and the leeward main beam.

[0010] Furthermore, the outer side of the second arc-shaped support rod near the rear edge web plate is provided with a second arc-shaped groove, and the outer side of the third arc-shaped support rod near the rear edge web plate is provided with a third arc-shaped groove. The two rear edge web plate flanges are respectively fitted into the second arc-shaped groove and the third arc-shaped groove.

[0011] Furthermore, the wind turbine blade structure also includes a connecting assembly for connecting the leading edge web, trailing edge web, leading edge stiffener, and trailing edge stiffener.

[0012] Furthermore, the connecting assembly includes a connecting rod, and the leading edge web, the trailing edge web, the first straight support rod, and the third straight support rod are respectively provided with a first connecting hole, a second connecting hole, a third connecting hole, and a fourth connecting hole at opposite positions. The connecting rod passes through the first connecting hole, the second connecting hole, the third connecting hole, and the fourth connecting hole. One end of the connecting rod is threaded to two first bolts, and the leading edge web and the first straight support rod are fixed between the two first bolts. The other end of the connecting rod is threaded to two second bolts, and the trailing edge web and the third straight support rod are fixed between the two second bolts.

[0013] The beneficial effects of this utility model include:

[0014] 1. The leading edge reinforcement frame can support the leading edge of the wind turbine blade shell, and the trailing edge reinforcement frame can support the trailing edge of the wind turbine blade shell, thereby reducing the pressure on the leading and trailing edge webs. At the same time, the leading and trailing edge reinforcement frames can support the leading and trailing edge webs respectively, preventing the leading and trailing edge webs from bending and deforming. This can prevent the wind turbine blade from breaking during wind farm operation, which could cause serious personal and property safety problems.

[0015] 2. The connecting assembly can be fixed and connected together between the leading edge web and the leading edge stiffener, and between the rear leading edge web and the rear edge stiffener. This can further prevent the leading edge web and the rear edge web from bending and deforming, thereby further preventing the wind turbine blade from breaking during wind farm operation and causing serious personal and property safety problems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high-strength wind turbine blade structure according to an embodiment of the present invention;

[0017] Figure 2 This is a partial structural diagram of a high-strength wind turbine blade according to an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of the high-strength wind turbine blade structure according to an embodiment of the present invention;

[0019] In the diagram: 1. Wind turbine blade shell; 2. Windward main beam; 3. Leeward main beam; 4. Leading edge web; 41. Leading edge web flange; 42. First connecting hole; 5. Trailing edge web; 51. Trailing edge web flange; 52. Second connecting hole; 6. Leading edge reinforcing frame; 61. First arc-shaped support rod; 611. First arc-shaped slot; 62. First straight support rod; 621. Third connecting hole; 63. Second straight support rod; 7. Trailing edge reinforcing frame; 71. Second arc-shaped support rod; 711. Second arc-shaped slot; 72. Third arc-shaped support rod; 721. Third arc-shaped slot; 73. Third straight support rod; 731. Fourth connecting hole; 74. Fourth straight support rod; 75. Fifth straight support rod; 81. Connecting rod; 82. First bolt; 83. Second bolt. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] This utility model embodiment provides a high-strength wind turbine blade structure, such as Figure 1-2As shown, the wind turbine blade housing 1 includes a windward main beam 2 mounted on the windward side of the wind turbine blade housing 1 and a leeward main beam 3 mounted on the leeward side of the wind turbine blade housing 1. A leading edge web 4 and a trailing edge web 5 are provided between the windward main beam 2 and the leeward main beam 3, along the length of the wind turbine blade housing 1. Several leading edge reinforcing frames 6, matching the cross-section of the leading edge of the wind turbine blade housing 1, are provided between the leading edge web 4 and the leading edge of the wind turbine blade housing 1. Several trailing edge reinforcing frames 6, matching the cross-section of the leading edge of the wind turbine blade housing 1, are provided between the trailing edge web 5 and the trailing edge of the wind turbine blade housing 1. The matching cross-section trailing edge reinforcement 7 supports the leading edge of the wind turbine blade shell 1 through the leading edge reinforcement 6 and the trailing edge of the wind turbine blade shell 1 through the trailing edge reinforcement 7, thereby reducing the pressure on the leading edge web 4 and the trailing edge web 5. At the same time, the leading edge reinforcement 6 and the trailing edge reinforcement 7 can support the leading edge web 4 and the trailing edge web 5 respectively, preventing the leading edge web 4 and the trailing edge web 5 from bending and deforming. This can prevent the wind turbine blade from breaking during wind farm operation, which could cause serious personal and property safety problems.

[0022] In this embodiment, as Figure 3 As shown, the leading edge reinforcement frame 6 includes a first arc-shaped support rod 61 that abuts against the inner wall of the leading edge of the wind turbine blade housing 1, and a first straight support rod 62 that abuts against the side of the leading edge web plate 4 near the leading edge of the wind turbine blade housing 1. The two ends of the first straight support rod 62 are respectively connected to the two ends of the first arc-shaped support rod 61, and the middle parts of the first straight support rod 62 and the middle parts of the first arc-shaped support rod 61 are respectively connected to the two ends of the second straight support rod 63. This kind of leading edge reinforcement frame 6 can support the leading edge of the wind turbine blade housing 1 and the leading edge web plate 4 at the same time, and the structure is stable. The two sides of the leading edge web plate 4 are respectively provided for connecting with the windward main beam 2 and the leeward main beam 3. The front edge web flange 41 is fixed by bonding. The front edge web flange 41 has an arc-shaped structure. The outer sides of both ends of the first arc-shaped support rod 61 are provided with first arc-shaped slots 611. The two front edge web flanges 41 are respectively locked in the two first arc-shaped slots 611. When the front edge reinforcement frame 6 is installed, the two ends of the first arc-shaped support rod 61 are locked between the two front edge web flanges 41. At the same time, the front edge reinforcement frame 6 cannot move in a direction perpendicular to the front edge web 4, but can only move along the length of the front edge web 4. Therefore, the installation position of the front edge reinforcement frame 6 can be adjusted to adjust the two adjacent front edge reinforcement frames 6 to a suitable distance, so the installation is convenient.

[0023] In this embodiment, the trailing edge reinforcement frame 7 includes a second arc-shaped support rod 71 that abuts against the inner wall of the windward side of the trailing edge of the wind turbine blade housing 1, a third arc-shaped support rod 72 that abuts against the inner wall of the leeward side of the trailing edge of the wind turbine blade housing 1, and a third straight support rod 73 that abuts against the side of the trailing edge web 5 near the trailing edge of the wind turbine blade housing 1. The end of the second arc-shaped support rod 71 away from the trailing edge web 5 is connected to the end of the third arc-shaped support rod 72 away from the trailing edge web 5. The ends of the second arc-shaped support rod 71 and the third arc-shaped support rod 72 near the trailing edge web 5 are respectively connected to the two ends of the third straight support rod 73. The middle portions of the second arc-shaped support rod 71 and the third arc-shaped support rod 72 are respectively connected to the two ends of a fourth straight support rod 74. The middle portions of the fourth straight support rod 74 and the third straight support rod 73 are respectively connected to the two ends of a fifth straight support rod 75. This type of trailing edge reinforcement frame 7 can support the trailing edge of the wind turbine blade housing 1 simultaneously. The rear edge web 5 is supported, ensuring structural stability. Simultaneously, rear edge web 5 has flange edges 51 on both sides for bonding and fixing to the windward main beam 2 and the leeward main beam 3. The outer side of the second arc-shaped support rod 71 near the rear edge web 5 has a second arc-shaped groove 711, and the outer side of the third arc-shaped support rod 72 near the rear edge web 5 also has a third arc-shaped groove 721. The two rear edge web flange edges 51 are respectively secured in the second arc-shaped grooves 711 and... Inside the third arc-shaped slot 721, when the rear edge reinforcement frame 7 is installed, the ends of the second arc-shaped support rod 71 and the third arc-shaped support rod 72 near the rear edge web plate 5 are locked between the flange edges 51 of the two rear edge web plates. At the same time, the rear edge reinforcement frame 7 cannot move in a direction perpendicular to the rear edge web plate 5, but can only move along the length of the rear edge web plate 5. Therefore, the installation position of the front edge reinforcement frame 7 can be adjusted, and the two adjacent front edge reinforcement frames 7 can be adjusted to a suitable distance, so the installation is convenient.

[0024] In this embodiment, the wind turbine blade structure further includes a connecting assembly 8 for connecting the leading edge web 4, the trailing edge web 5, the leading edge reinforcing frame 6, and the trailing edge reinforcing frame 7. Specifically, the connecting assembly 8 includes a connecting rod 81. The leading edge web 4, the trailing edge web 5, the first straight support rod 62, and the third straight support rod 73 are respectively provided with a first connecting hole 42, a second connecting hole 52, a third connecting hole 621, and a fourth connecting hole 731 at opposite positions. The connecting rod 81 passes through the first connecting hole 42, the second connecting hole 52, the third connecting hole 621, and the fourth connecting hole 731. One end of the connecting rod 81 is threaded. Two first bolts 82 are connected, the leading edge web plate 4 and the first straight support rod 62 are fixed between the two first bolts 82, the other end of the connecting rod 81 is threaded to two second bolts 83, the trailing edge web plate 5 and the third straight support rod 73 are fixed between the two second bolts 83, the connecting assembly 8 can be fixed between the leading edge web plate 4 and the leading edge reinforcing frame 6, and between the trailing edge web plate 5 and the trailing edge reinforcing frame 7, and can further prevent the leading edge web plate 4 and the trailing edge web plate 5 from bending and deforming, thereby further preventing the wind turbine blade from breaking during wind farm operation, causing serious personal and property safety problems.

[0025] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A high-strength wind turbine blade structure, comprising a wind turbine blade shell (1), wherein a windward main beam (2) is installed on the windward side of the wind turbine blade shell (1), and a leeward main beam (3) is installed on the leeward side of the wind turbine blade shell (1), wherein a leading edge web (4) and a trailing edge web (5) are provided between the windward main beam (2) and the leeward main beam (3) and along the length direction of the wind turbine blade shell (1), characterized in that, A plurality of leading edge reinforcing frames (6) matching the leading edge cross section of the wind turbine blade housing (1) are provided between the leading edge web plate (4) and the leading edge of the wind turbine blade housing (1), and a plurality of trailing edge reinforcing frames (7) matching the trailing edge cross section of the wind turbine blade housing (1) are provided between the trailing edge web plate (5) and the trailing edge of the wind turbine blade housing (1). The leading edge reinforcement frame (6) includes a first arc-shaped support rod (61) that abuts against the inner wall of the leading edge of the wind turbine blade housing (1) and a first straight support rod (62) that abuts against the side of the leading edge web (4) near the leading edge of the wind turbine blade housing (1). The two ends of the first straight support rod (62) are respectively connected to the two ends of the first arc-shaped support rod (61), and the middle part of the first straight support rod (62) and the middle part of the first arc-shaped support rod (61) are respectively connected to the two ends of the second straight support rod (63). The trailing edge reinforcement (7) includes a second arc-shaped support rod (71) abutting against the inner wall of the windward side of the trailing edge of the wind turbine blade housing (1), a third arc-shaped support rod (72) abutting against the inner wall of the leeward side of the trailing edge of the wind turbine blade housing (1), and a third straight support rod (73) abutting against the side of the trailing edge web (5) near the trailing edge of the wind turbine blade housing (1). The end of the second arc-shaped support rod (71) away from the trailing edge web (5) and the end of the third arc-shaped support rod (72) away from the trailing edge web (5) are connected. The ends of the second arc-shaped support rod (71) near the rear edge web plate (5) and the third arc-shaped support rod (72) near the rear edge web plate (5) are respectively connected to the two ends of the third straight support rod (73). The middle part of the second arc-shaped support rod (71) and the middle part of the third arc-shaped support rod (72) are respectively connected to the two ends of the fourth straight support rod (74). The middle part of the fourth straight support rod (74) and the middle part of the third straight support rod (73) are respectively connected to the two ends of the fifth straight support rod (75).

2. The high-strength wind turbine blade structure according to claim 1, characterized in that, The front web (4) is provided with front web flange edges (41) on both sides for bonding and fixing with the windward main beam (2) and the leeward main beam (3).

3. The high-strength wind turbine blade structure according to claim 2, characterized in that, The first arc-shaped support rod (61) has a first arc-shaped groove (611) on both outer sides, and the two front edge web flange edges (41) are respectively locked inside the two first arc-shaped grooves (611).

4. The high-strength wind turbine blade structure according to claim 3, characterized in that, The rear web (5) is provided with rear web flange edges (51) on both sides for bonding and fixing with the windward main beam (2) and the leeward main beam (3).

5. The high-strength wind turbine blade structure according to claim 4, characterized in that, The second arc-shaped support rod (71) has a second arc-shaped groove (711) on the outer side near the rear edge web plate (5), and the third arc-shaped support rod (72) has a third arc-shaped groove (721) on the outer side near the rear edge web plate (5). The two rear edge web plate flange edges (51) are respectively locked inside the second arc-shaped groove (711) and the third arc-shaped groove (721).

6. The high-strength wind turbine blade structure according to claim 5, characterized in that, The wind turbine blade structure also includes a connecting assembly (8) for connecting the leading edge web (4), the trailing edge web (5), the leading edge stiffener (6), and the trailing edge stiffener (7).

7. The high-strength wind turbine blade structure according to claim 6, characterized in that, The connecting assembly (8) includes a connecting rod (81). The front edge web (4), the rear edge web (5), the first straight support rod (62), and the third straight support rod (73) are respectively provided with a first connecting hole (42), a second connecting hole (52), a third connecting hole (621), and a fourth connecting hole (731) at opposite positions. The connecting rod (81) passes through the first connecting hole (42), the second connecting hole (52), the third connecting hole (621), and the fourth connecting hole (731). One end of the connecting rod (81) is threaded to two first bolts (82). The front edge web (4) and the first straight support rod (62) are fixed between the two first bolts (82). The other end of the connecting rod (81) is threaded to two second bolts (83). The rear edge web (5) and the third straight support rod (73) are fixed between the two second bolts (83).

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