CN219242092U - Wind power blade and wind power generation equipment - Google Patents
Wind power blade and wind power generation equipment Download PDFInfo
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- CN219242092U CN219242092U CN202223552718.0U CN202223552718U CN219242092U CN 219242092 U CN219242092 U CN 219242092U CN 202223552718 U CN202223552718 U CN 202223552718U CN 219242092 U CN219242092 U CN 219242092U
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- 238000010248 power generation Methods 0.000 title abstract description 12
- 239000000463 material Substances 0.000 abstract description 30
- 238000010008 shearing Methods 0.000 description 5
- 240000007182 Ochroma pyramidale Species 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model belongs to the technical field of wind power generation, and particularly relates to a wind power blade and wind power generation equipment. In the arrangement direction of the two skins, the size of the second frame is smaller than that of the first frame, so that the rigidity of the wind power blade at other positions except the maximum chord length is ensured while less material is added, the rigidity of the whole wind power blade is improved, and the increase of the material and cost of the wind power blade is reduced while the increase of the rigidity of the wind power blade is met.
Description
Technical Field
The utility model belongs to the technical field of wind power generation, and particularly relates to a wind power blade and wind power generation equipment.
Background
The wind power generation equipment mainly captures wind energy by wind power generator blades (wind power blades for short), and the length of the wind power blades directly influences the capability of the wind power generator for capturing the wind energy and the output power of a wind power generator set. In order to improve the output power of the wind driven generator, the wind power blades are longer and longer, the diameter of the impeller of the wind turbine generator is larger and larger, so that the incoming wind speed on the surface of the wind power blades is uneven, the wind power blades bear uneven pneumatic load and fatigue load, the overall rigidity of the wind power blades is insufficient, and the shearing force born by the wind power blades is increased.
In the prior art, the wind power blade comprises a suction surface skin, a pressure surface skin, two main beams and a web, wherein the suction surface skin is adhered to the pressure surface skin, the two main beams are positioned at the maximum chord length of the wind power blade, namely, the maximum distance position of the suction surface skin and the pressure surface skin, the two main beams are adhered to the suction surface skin and the pressure surface skin respectively, and the web is connected with the two main beams. The wind power blade is provided with a front edge and a rear edge, the front edge is positioned at the front end of the wind power blade in the rotating direction along with the impeller, the rear edge is positioned at the rear end of the wind power blade in the wing-shaped rotating direction, the arrangement direction of the front edge and the rear edge of the wind power blade is the front-back direction of the wind power blade, and the front-back direction of the wind power blade is vertical to the arrangement direction of the suction surface skin and the pressure surface skin and is also vertical to the length direction of the wind power blade. In order to improve the overall rigidity of the ultra-long wind power blade and improve the shearing force which can be born by the ultra-long wind power blade, the existing main measure is to increase the thicknesses of the main girder, the web and the skin of the wind power blade, so that the bending rigidity and the shearing rigidity of the ultra-long wind power blade are improved.
However, the increase of the thickness of the main girder, the web and the skin of the ultra-long wind power blade can cause the material consumption of the whole wind power blade to be greatly increased, and the dead load and the cost of the wind power blade are greatly increased. Therefore, the technical problems that the rigidity of the ultra-long wind power blade is increased and the dead weight and the cost of the wind power blade are greatly increased exist in the prior art.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: aiming at the technical problems that the rigidity of the existing ultra-long wind power blade is increased and the dead weight and the cost of the wind power blade are greatly increased, the wind power blade and wind power generation equipment are provided.
In order to solve the technical problems, in one aspect, an embodiment of the present utility model provides a wind power blade, including a suction surface skin, a pressure surface skin, a first frame and a second frame, where two ends of the suction surface skin are connected with two ends of the pressure surface skin to enclose a blade cavity, the wind power blade has a width direction perpendicular to an arrangement direction of the suction surface skin and the pressure surface skin, and the width direction of the wind power blade is perpendicular to a length direction of the wind power blade;
the first frame and the second frame are both positioned in the inner cavity of the blade, the first frame and the second frame are both connected between the suction surface skin and the pressure surface skin, the first frame is positioned at the maximum chord length of the wind power blade, and the first frame and the second frame are arranged at intervals in the width direction of the wind power blade;
the second frame has a smaller size than the first frame in an arrangement direction of the suction surface skin and the pressure surface skin.
Optionally, the wind power blade includes a transverse web, the transverse web is attached to and connected with at least one of the suction surface skin and the pressure surface skin, and the transverse web is connected between the first frame and the second frame.
Optionally, the two transverse webs are a suction surface transverse web and a pressure surface transverse web, the suction surface transverse web is attached to and connected with the suction surface skin, and the pressure surface transverse web is attached to and connected with the pressure surface skin.
Optionally, two ends of the suction surface transverse web in the width direction of the wind power blade are respectively connected with one end of the first frame in the width direction of the wind power blade and one end of the second frame in the width direction of the wind power blade;
and two ends of the pressure surface transverse web plate in the width direction of the wind power blade are respectively connected with one end of the first frame in the width direction of the wind power blade and one end of the second frame in the width direction of the wind power blade.
Optionally, a pressure surface web plate groove is formed in the pressure surface skin, the pressure surface transverse web plate is located in the pressure surface web plate groove, and the pressure surface transverse web plate is attached to and connected with the groove bottom wall of the pressure surface web plate groove;
the suction surface web plate groove is formed in the suction surface skin, the suction surface transverse web plate is located in the suction surface web plate groove, and the suction surface transverse web plate is attached to and connected with the groove bottom wall of the suction surface web plate groove.
Optionally, the transverse webs extend in the width direction of the wind power blade, and the transverse webs are arranged at intervals in the length direction of the wind power blade.
Optionally, two ends in the width direction of the wind power blade are a front edge end and a rear edge end respectively, in the working process of the wind power blade, the front edge end is located at the front end of the wind power blade in the rotation direction, the rear edge end is located at the rear end of the wind power blade in the rotation direction, and the second frame is located between the maximum chord length of the wind power blade and the rear edge end.
Optionally, the first frame includes a first pressure face beam, a first suction face beam and a first web, the first pressure face beam is attached to and connected with the pressure face skin, the first suction face beam is attached to and connected with the suction face skin, and the first web is connected between the first pressure face beam and the first suction face beam.
Optionally, two first webs are arranged at intervals in the width direction of the wind power blade.
Optionally, a first pressure surface beam groove is formed in the pressure surface skin, the first pressure surface beam is located in the first pressure surface beam groove, and the first pressure surface beam is attached to and connected with the groove bottom wall of the first pressure surface beam groove;
the suction surface skin is provided with a first suction surface beam groove, the first suction surface beam is positioned in the first suction surface beam groove, and the first suction surface beam is attached to and connected with the groove bottom wall of the first suction surface beam groove.
Optionally, the second frame includes a second pressure face beam, a second suction face beam, and a second web, the second pressure face beam is attached to and connected with the pressure face skin, the second suction face beam is attached to and connected with the suction face skin, and the second web is connected between the second pressure face beam and the second suction face beam.
Optionally, two second webs are arranged at intervals in the width direction of the wind power blade.
Optionally, a second pressure surface beam groove is formed in the pressure surface skin, the second pressure surface beam is located in the second pressure surface beam groove, and the second pressure surface beam is attached to and connected with the groove bottom wall of the second pressure surface beam groove;
the suction surface skin is provided with a second suction surface beam groove, the second suction surface beam is positioned in the second suction surface beam groove, and the second suction surface beam is attached to and connected with the groove bottom wall of the second suction surface beam groove.
According to the wind power blade provided by the embodiment of the utility model, the first frame and the second frame are arranged in the inner cavity of the blade surrounded by the suction surface skin and the pressure surface skin, the first frame and the second frame are connected between the pressure surface skin and the suction surface skin, the first frame is positioned at the maximum chord length of the wind power blade, the second frame and the first frame are arranged at intervals in the width direction of the wind power blade, and the size of the first frame in the arrangement direction of the suction surface skin and the pressure surface skin is larger than the size of the second frame in the arrangement direction of the suction surface skin and the pressure surface skin because the maximum chord length of the blade is positioned at the maximum distance position of the suction surface skin and the pressure surface skin.
In this way, the rigidity of the blade at the maximum chord length is ensured through the first frame, and the rigidity of the wind power blade at other positions except the maximum chord length is ensured while less materials are added through the second frame which is arranged in the inner cavity of the blade and has smaller size in the arrangement direction of the two skins.
On the other hand, the embodiment of the utility model provides wind power generation equipment, which comprises an impeller, wherein the impeller comprises a hub and a plurality of wind power blades, and one end of each wind power blade in the length direction is connected with the hub.
Drawings
FIG. 1 is a schematic view of a wind turbine blade according to a first embodiment of the present utility model;
FIG. 2 is a schematic view of another angle of a wind turbine blade according to the first embodiment of the present utility model;
FIG. 3 is a schematic view of a hidden suction side skin in a wind turbine blade according to a first embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of a wind turbine blade according to a first embodiment of the present utility model at a location of a transverse web and in a plane perpendicular to the length direction of the wind turbine blade;
FIG. 5 is a schematic cross-sectional view of a wind turbine blade according to a first embodiment of the present utility model in a plane perpendicular to the longitudinal direction of the wind turbine blade without providing a transverse web.
Reference numerals in the specification are as follows:
1. a suction side skin; 2. a pressure face skin; 3. a leading edge end; 4. a trailing edge end; 5. maximum chord length; 6. a first frame; 61. a first suction side beam; 62. a first pressure face beam; 63. a first web; 7. a second frame; 71. a second suction side beam; 72. a second pressure face beam; 73. a second web; 81. a suction side transverse web; 82. the pressure face is a transverse web.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
First embodiment
As shown in fig. 1 to 5, the wind power blade provided by the first embodiment of the utility model is an ultra-long wind power blade, and the wind power blade comprises a blade skin, a first frame 6 and a second frame 7, wherein the blade skin comprises a pressure surface skin 2 and a suction surface skin 1, two ends of the suction surface skin 1 are connected with two ends of the pressure surface skin 2 to form a blade inner cavity, the wind power blade is provided with a width direction perpendicular to the arrangement direction of the suction surface skin 1 and the pressure surface skin 2, and the width direction of the wind power blade is perpendicular to the length direction of the wind power blade. The first frames 6 and the second frames 7 are located in the inner cavity of the blade, the first frames 6 and the second frames 7 are arranged at intervals in the width direction of the wind power blade, the first frames 6 are located at the maximum chord length 5 of the wind power blade, and the first frames 6 and the second frames 7 are connected between the suction surface skin 1 and the pressure surface skin 2. In the direction of arrangement of the pressure side skin 2 and the suction side skin 1, the dimensions of the second frame 6 are smaller than those of the first frame 7
In this way, the first frame 6 arranged at the maximum chord 5 can support the blade skin, so that aerodynamic load and shear load borne by the blade skin can be shared, the load borne by the blade skin can be reduced, and the rigidity of the whole wind power blade at the maximum chord 5 can be improved.
The second frame 7 with smaller size in the arrangement direction of the suction surface skin 1 and the pressure surface skin 2 is arranged in the inner cavity of the blade so as to share the aerodynamic load and the shearing load of the wind power blade at the arrangement position of the second frame 7, ensure the rigidity of the wind power blade at the arrangement position of the second frame 7 and further improve the rigidity of the whole wind power blade.
Compared with the mode of increasing the thicknesses of the main beam, the web and the skin to improve the rigidity of the wind power blade in the prior art, the material consumption of the second frame 7 is smaller than that of the first frame 6, namely smaller than that of the main beam, the web and the skin in the prior art, so that the rigidity of the whole wind power blade can be improved while fewer materials are increased, and for the ultra-long wind power blade, the material and cost increasing amount of the ultra-long wind power blade can be reduced while the rigidity increasing of the ultra-long wind power blade is met.
Specifically, in this embodiment, as shown in fig. 4 and 5, two ends of the wind power blade in the width direction thereof are respectively a front edge 3 and a rear edge 4, in the process that the wind power blade rotates along with the wind power impeller, the front edge 3 is located at the front end of the wind power blade in the rotation direction, the rear edge 4 is located at the rear end of the wind power blade in the rotation direction, and the suction surface skin 1 and the pressure surface skin 2 are adhered to each other at the front edge 3 and the rear edge 4 of the wind power blade so as to enclose a blade cavity.
The maximum chord 5 of the wind turbine blade is a position where the distance between the suction surface skin 1 and the pressure surface skin 2 is the largest in the arrangement direction of the suction surface skin 1 and the pressure surface skin 2. In this embodiment, in the width direction of the wind power blade, the distance between the wind power blade maximum chord 5 and the wind power blade leading edge 3 is smaller than the distance between the wind power blade maximum chord 5 and the wind power blade trailing edge 4. The second frame 7 is arranged between the maximum chord length 5 and the trailing edge 4 of the wind power blade so as to uniformly support the blade skin by the first frame 6 and the second frame 7 in the width direction of the wind power blade, thereby being beneficial to reducing the rigidity difference of the wind power blade in all parts in the width direction and further improving the overall rigidity of the wind power blade.
In this embodiment, the distance between the front edge 3 of the wind power blade in the arrangement direction of the pressure surface skin 2 and the suction surface skin 1 is larger, the front edge 3 of the wind power blade is smoother, the distance between the rear edge 4 of the wind power blade in the arrangement direction of the pressure surface skin 2 and the suction surface skin 1 is smaller, the position of the rear edge 4 is flatter, and the second frame 7 is arranged at the position close to the rear edge 4, so that the size of the second frame 7 in the arrangement direction of the pressure surface skin 2 and the suction surface skin 1 can be greatly reduced, and the material consumption of the whole wind power blade due to the arrangement of the second frame 7 can be greatly reduced while the improvement of the rigidity of the wind power blade is satisfied.
In this embodiment, as shown in fig. 4 and 5, the first frame 6 includes a first pressure surface beam 62, a first suction surface beam 61 and a first web 63, where the first pressure surface beam 62 is attached to and adhered to a side surface of the pressure surface skin 2 facing the suction surface skin 1, the first suction surface beam 61 is attached to and adhered to a side surface of the suction surface skin 1 facing the pressure surface skin 2, the length direction of the first pressure surface beam 62 and the length direction of the first suction surface beam 61 are both the same as the length direction of the wind power blade, the length of the first pressure surface beam 62 is equal to the length of the first suction surface beam 61, the length of the first pressure surface beam 62 is slightly smaller than the length of the wind power blade, the width direction of the first pressure surface beam 62 and the width direction of the first suction surface beam 61 are both the same as the width direction of the wind power blade, and the width of the first pressure surface beam 62 is far smaller than the width of the wind power blade.
In this embodiment, a first pressure side beam groove (not shown in the figure) is provided on the side of the pressure side skin 2 facing the suction side skin 1, the first pressure side beam 62 is located in the first pressure side beam groove, and the side of the first pressure side beam 62 is bonded and adhered to the bottom surface of the first pressure side beam groove. A first suction side beam groove (not shown in the figure) is formed in the suction side skin 1 on the side surface facing the pressure side skin 2, the first suction side beam 61 is located in the first suction side beam groove, and the side surface of the first suction side beam 61 is bonded and adhered to the groove bottom surface of the first suction side beam groove. Therefore, the thickness of the blade skin at the maximum chord length 5 of the wind power blade can be reduced, the rigidity requirement on the blade skin is reduced, and the material usage amount and cost of the blade skin are reduced.
The length direction of the first web 63 is the same as the length direction of the wind power blade, the length of the first web 63 is equal to the length of the first pressure surface beam 62, the width direction of the first web 63 is the same as the arrangement direction of the pressure surface skin 2 and the suction surface skin 1, the width direction of the first web 63 is perpendicular to the width direction of the first pressure surface beam 62, and two ends of the first web 63 in the width direction are respectively connected with the first pressure surface beam 62 and the first suction surface beam 61 so as to support the first pressure surface beam 62 and the first suction surface beam 61, so that the first frame 6 is attached to the blade skin to support the blade skin, and the rigidity of the whole wind power blade is improved.
The structure of the first pressure side beam groove and the first suction side beam groove on the blade skin to install the first pressure side beam 62 and the first suction side beam 61 in the first frame 6 in the embodiment can improve the rigidity of the whole wind power blade, reduce the increase of the wind power blade material caused by the arrangement of the first frame 6, and reduce the material consumption and the cost of the whole wind power blade for improving the rigidity.
In this embodiment, the two first webs 63 are arranged at intervals in the width direction of the wind power blade, and the thickness of each first web 63 is thinner, so that the first web 63 can uniformly support the first pressure surface beam 62 and the first suction surface beam 61 in the width direction of the wind power blade while the material consumption of each first web 63 is reduced, which is helpful for increasing the support area of the first frame 6 on the blade skin in the width direction of the wind power blade, thereby being helpful for improving the rigidity uniformity of the whole blade skin in the width direction and being helpful for uniformly arranging the rigidity of the whole wind power blade in the width direction of the wind power blade.
In this embodiment, as shown in fig. 4 and 5, the second frame 7 includes a second pressure surface beam 72, a second suction surface beam 71 and a second web 73, the second pressure surface beam 72 is attached to and adhered to a side surface of the pressure surface skin 2 facing the suction surface skin 1, the second suction surface beam 71 is attached to and adhered to a side surface of the suction surface skin 1 facing the pressure surface skin 2, the length direction of the second pressure surface beam 72 and the length direction of the second suction surface beam 71 are both the same as the length direction of the wind power blade, the length of the second pressure surface beam 72 is equal to the length of the second suction surface beam 71, the length of the second pressure surface beam 72 is slightly smaller than the length of the wind power blade, the width direction of the second pressure surface beam 72 and the width direction of the second suction surface beam 71 are both the same as the width direction of the wind power blade, and the width of the second pressure surface beam 72 is far smaller than the width of the wind power blade.
In this embodiment, a second pressure side beam groove (not shown in the figure) is provided on the side of the pressure side skin 2 facing the suction side skin 1, the second pressure side beam 72 is located in the second pressure side beam groove, and the side of the second pressure side beam 72 is bonded and adhered to the bottom surface of the second pressure side beam groove. A second suction side beam groove (not shown in the figure) is formed in the side surface of the suction side skin 1 facing the suction side skin 1, the second suction side beam 71 is located in the second suction side beam groove, and the side surface of the second suction side beam 71 is bonded and adhered to the bottom surface of the second suction side beam groove. Therefore, the thickness of the blade skin at the position where the second frame 7 is arranged can be reduced, the rigidity requirement on the blade skin is reduced, and the material usage amount and cost of the blade skin are reduced.
The length direction of the second web 73 is the same as the length direction of the wind power blade, the length of the second web 73 is equal to the length of the second pressure surface beam 72, the width direction of the second web 73 is the same as the arrangement direction of the pressure surface skin 2 and the suction surface skin 1, the width direction of the second web 73 is perpendicular to the width direction of the second pressure surface beam 72, and two ends of the second web 73 in the width direction are respectively connected with the second pressure surface beam 72 and the second suction surface beam 71 so as to support the second pressure surface beam 72 and the second suction surface beam 71, so that the second frame 7 is attached to the blade skin to support the blade skin, and the rigidity of the whole wind power blade is improved.
The structure of the second pressure side beam groove and the second suction side beam groove on the blade skin to mount the second pressure side beam 72 and the second suction side beam 71 in the second frame 7 in the embodiment can improve the rigidity of the whole wind power blade, reduce the increase of the wind power blade material caused by the second frame 7, and reduce the material consumption and the cost of the whole wind power blade for improving the rigidity.
In this embodiment, two second webs 73 are arranged at intervals in the width direction of the wind power blade, and the thickness of each second web 73 is thinner, so that the second webs 73 can uniformly support the second pressure surface beam 72 and the second suction surface beam 71 in the width direction of the wind power blade while the material consumption of each second web 73 is reduced, the supporting area of the second frame 7 on the blade skin in the width direction of the wind power blade is increased, the rigidity uniformity of the whole blade skin in the width direction of the blade skin is improved, and the rigidity of the whole wind power blade is uniformly arranged in the width direction of the wind power blade.
In this embodiment, as shown in fig. 3 and fig. 4, the wind power blade further includes two transverse webs, which are a suction side transverse web 81 and a pressure side transverse web 82, where the side surface of the suction side transverse web 81 facing the suction side skin 1 is attached to and adhered to the suction side skin 1, and the side surface of the pressure side transverse web 82 facing the pressure side skin 2 is attached to and adhered to the pressure side skin 2, so as to support the blade skin through the transverse webs, and improve the rigidity of the whole wind power blade at the position of the transverse web.
Specifically, a pressure surface web groove (not shown in the figure) is formed in the side surface, facing the suction surface skin 1, of the pressure surface skin 2, the pressure surface transverse web 82 is located in the pressure surface web groove, the side surface, facing the pressure surface skin 2, of the pressure surface transverse web 82 is bonded to the groove bottom wall of the pressure surface web groove, a suction surface web groove (not shown in the figure) is formed in the side surface, facing the pressure surface skin 2, of the suction surface transverse web 81, located in the suction surface web groove, and the side surface, facing the pressure surface skin 2, of the suction surface transverse web 81 is bonded to the groove bottom wall of the suction surface web groove. The thickness of the blade skin at the position of the transverse web is reduced, the rigidity requirement on the blade skin is reduced, and the material usage amount and cost of the blade skin are reduced, so that the rigidity of the whole wind power blade is improved, and the material increment of the wind power blade caused by the arrangement of the transverse web is reduced.
In this embodiment, the length direction of the transverse web is the same as the width direction of the wind power blade, the width direction of the transverse web is the same as the length direction of the wind power blade, the pressure surface transverse web 82 is provided with a plurality of the same, and the pressure surface transverse webs 82 are uniformly spaced in the width direction of the pressure surface transverse web 82, that is, in the length direction of the wind power blade, the suction surface transverse web 81 is provided with a plurality of the same, that is, in the length direction of the wind power blade, the suction surface transverse web 81 is uniformly spaced in the width direction of the suction surface transverse web 81, that is, in this way, in the length direction of the wind power blade, the rigidity uniformity of the wind power blade at the position where the transverse web is arranged is ensured, and meanwhile, the wind power blade material increment caused by the arrangement of the transverse web is further reduced while the rigidity of the whole wind power blade is improved.
In this embodiment, a pressure surface web groove is formed in a side surface of the pressure surface skin 2 facing the suction surface skin 1, a suction surface web groove is formed in a side surface of the suction surface skin 1 facing the pressure surface skin 2, a suction surface transverse web 81 is located in the suction surface web groove, the side surface of the suction surface transverse web 81 facing the suction surface skin 1 is bonded to the groove bottom surface of the suction surface web groove, a pressure surface transverse web 82 is located in the pressure surface web groove, and the side surface of the pressure surface transverse web 82 facing the pressure surface skin 2 is bonded to the groove bottom surface of the pressure surface web groove.
Therefore, the thickness of the blade skin at the position where the transverse web plate is arranged can be reduced, on one hand, the rigidity requirement on the blade skin can be reduced, and the material consumption and cost of the blade skin are reduced; on the other hand, as the transverse web supports the blade skin, the rigidity of the whole wind power blade can be improved, and meanwhile, the increase of wind power blade materials caused by the arrangement of the transverse web can be reduced.
In this embodiment, one end of the suction surface transverse web 81 in the length direction is connected with one end of the first suction surface beam 61, the other end is connected with one end of the second suction surface beam 71, one end of the pressure surface transverse web 82 in the length direction is connected with one end of the first pressure surface beam 62, and the other end is connected with one end of the second pressure surface beam 72, so that the first frame 6, the second frame 7 and the transverse web form an integrated frame structure, the integrated frame structure is more stable, the supporting effect on the blade skin is better, the aerodynamic load and the shearing load of the blade skin which can be shared by the integrated frame structure are more, the load born by the blade skin can be further reduced, the rigidity requirement on the blade skin is further reduced, and meanwhile, the rigidity of the whole wind power blade is further improved through the support of the integrated frame structure on the blade skin.
In this embodiment, the first suction side beam slot, the suction side web slot and the second suction side beam slot on the suction side skin 1 are communicated, and the first pressure side beam slot, the pressure side web slot and the second pressure side beam slot on the pressure side skin 2 are communicated, so that the processing of the communication slots on the blade skin is convenient, and meanwhile, when the first frame 6, the second frame 7 and the transverse web are installed, the first frame 6, the second frame 7 and the transverse web can be pre-positioned, and the installation of the first frame 6, the second frame 7 and the transverse web in the inner cavity of the blade is convenient.
In this embodiment, the materials of manufacture of the blade skin, the first frame 6, the second frame 7 and the transverse web are conventional composite materials which are inexpensive to manufacture. Specifically, in this embodiment, the blade skin material is glass fiber cloth injection molding (epoxy resin), and in other embodiments, a balsa wood material (balsa wood) may be used. In this embodiment, the first suction side beam 61 and the first pressure side beam 62 in the first frame 6, and the second suction side beam 71 and the second pressure side beam 72 in the second frame 7 are all made of glass fiber reinforced plastics, and in other embodiments, they may be made of glass fiber reinforced plastics with balsawood cores. In this embodiment, the transverse web, the first web 63 and the second web 73 are made of glass fiber reinforced plastics.
In this embodiment, the connection manner of each beam, web and blade skin is the same as that in the prior art, and will not be described here again.
Second embodiment
The second embodiment of the utility model provides a wind power blade, which is different from the first embodiment in that the wind power blade further comprises a third frame, the third frame is positioned between the front edge ends of the maximum chord length of the wind power blade, the structure of the third frame is the same as that of the first frame and the second frame, the connection mode of the third frame and the blade skin is the same as that of the first frame and the blade skin, and the blade skin is supported by the third frame so as to improve the rigidity between the maximum chord length and the front edge ends of the wind power blade, further improve the rigidity of the whole wind power blade, and improve the rigidity uniformity of the whole wind power blade in the width direction.
In other embodiments, the third frame is not provided, the second frame is arranged between the front edge ends with the maximum chord length, and the blade skin is supported by the second frame to improve the rigidity of the wind power blade between the maximum chord length and the front edge ends, so that the rigidity of the whole wind power blade is improved, and the rigidity uniformity of the whole wind power blade in the width direction is improved.
Third embodiment
The third embodiment of the present utility model provides a wind power blade, which is different from the first embodiment in that the widths of the first suction side beam and the first pressure side beam in the first frame are both longer, and the widths of the second suction side beam and the second pressure side beam in the second frame are also longer, so that a transverse web is not required to be arranged between the first frame and the second frame, and the rigidity of the whole wind power blade is improved only through the first frame and the second frame.
In this embodiment, the structure of the first suction side beam, the second suction side beam, the first pressure side beam and the second pressure side beam may be changed to reduce the amount of wind power blade material increased by increasing the overall rigidity of the wind power blade.
Specifically, the first suction side beam is taken as an example, and the structures of the second suction side beam, the first pressure side beam and the second pressure side beam are substantially the same as those of the first suction side beam. The length direction of the first suction surface beam is identical to the width direction of the wind power blade, the width direction of the first suction surface beam is identical to the length direction of the wind power blade, and the first suction surface beams are uniformly arranged at intervals in the length direction of the wind power blade, so that the material consumption of the first suction surface beam is reduced, and meanwhile, the supporting effect of the first suction surface beam on the suction surface skin is ensured, so that the rigidity of the wind power blade is improved, and the material consumption of the wind power blade increased due to the arrangement of the first frame and the second frame is reduced.
Fourth embodiment
A fourth embodiment of the present utility model provides a wind power blade, which is different from the first embodiment in that only one of the suction side and the pressure side is provided with a transverse web, such as only the suction side transverse web, and the rigidity of the pressure side skin is ensured by increasing the thickness of the pressure side skin, and the other side suction side skin is provided with a suction side web slot to reduce the thickness of the suction side transverse web, and the rigidity of the wind power blade at the position of the suction side skin is improved by providing the suction side transverse web to support the suction side skin. Therefore, the rigidity of the wind power blade can be improved, and the material consumption of the wind power blade increased due to the rigidity can be reduced.
Fifth embodiment
The fifth embodiment of the utility model provides a wind power blade, which is different from the first embodiment in that a pressure surface web groove, a first pressure surface beam groove and a second pressure surface beam groove which are arranged on a pressure surface skin are eliminated, and a suction surface web groove, a first suction surface beam groove and a second suction surface beam groove which are arranged on a suction surface skin are also eliminated.
Sixth embodiment
The sixth embodiment of the present utility model provides a wind power blade, which is different from the first embodiment in that the structure of each transverse web is substantially the same, the length direction of the transverse web is the same as the length direction of the wind power blade, the width direction of the transverse web is the same as the width direction of the wind power blade, the lengths of the transverse webs are equal to the lengths of the first suction side beam, the second suction side beam, the first pressure side beam and the second pressure side beam, two ends of the transverse web in the width direction of the suction side are respectively connected with one end of the first suction side beam and one end of the second suction side beam, and two ends of the transverse web in the width direction of the pressure side are respectively connected with one end of the first pressure side beam and one end of the second pressure side beam, so that the transverse web, the first frame and the second frame form an integrated frame structure.
This structural arrangement also enables a reduction in the amount of wind blade material added due to the increased stiffness while increasing the stiffness of the wind blade.
The embodiment of the utility model also provides wind power generation equipment, which comprises an impeller, wherein the impeller comprises a hub and the wind power blades in any one of the embodiments, the number of the wind power blades is three, one end of the wind power blades in the length direction is connected to the hub, and the three wind power blades are uniformly arranged at intervals in the circumferential direction of the hub. The wind power generation equipment can reduce the material increment and the cost increment of the wind power generation equipment while increasing the output power by arranging the wind power blades with ultra-long sizes.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (14)
1. The wind power blade is characterized by comprising a suction surface skin, a pressure surface skin, a first frame and a second frame, wherein two ends of the suction surface skin are connected with two ends of the pressure surface skin to form a blade cavity, the wind power blade is provided with a width direction perpendicular to the arrangement direction of the suction surface skin and the pressure surface skin, and the width direction of the wind power blade is perpendicular to the length direction of the wind power blade;
the first frame and the second frame are both positioned in the inner cavity of the blade, the first frame and the second frame are both connected between the suction surface skin and the pressure surface skin, the first frame is positioned at the maximum chord length of the wind power blade, and the first frame and the second frame are arranged at intervals in the width direction of the wind power blade;
the second frame has a smaller size than the first frame in an arrangement direction of the suction surface skin and the pressure surface skin.
2. The wind blade of claim 1, comprising a transverse web that is attached to and connected to at least one of the suction side skin and the pressure side skin, the transverse web being connected between the first frame and the second frame.
3. The wind turbine blade of claim 2, wherein there are two transverse webs, a suction side transverse web and a pressure side transverse web, the suction side transverse web being attached to and connected with the suction side skin, the pressure side transverse web being attached to and connected with the pressure side skin.
4. A wind turbine blade according to claim 3, wherein the wind turbine blade comprises a blade, two ends of the suction surface transverse web plate in the width direction of the wind power blade are respectively connected with one end of the first frame in the width direction of the wind power blade and one end of the second frame in the width direction of the wind power blade;
and two ends of the pressure surface transverse web plate in the width direction of the wind power blade are respectively connected with one end of the first frame in the width direction of the wind power blade and one end of the second frame in the width direction of the wind power blade.
5. A wind power blade according to claim 3, wherein the pressure surface skin is provided with a pressure surface web groove, the pressure surface transverse web is positioned in the pressure surface web groove, and the pressure surface transverse web is adhered and connected with the groove bottom wall of the pressure surface web groove;
the suction surface web plate groove is formed in the suction surface skin, the suction surface transverse web plate is located in the suction surface web plate groove, and the suction surface transverse web plate is attached to and connected with the groove bottom wall of the suction surface web plate groove.
6. A wind power blade according to any of claims 2-5, wherein the transverse webs extend in the width direction of the wind power blade, the transverse webs being spaced apart in the length direction of the wind power blade.
7. A wind power blade according to any of claims 1-5, wherein the wind power blade has a leading edge and a trailing edge at each of its width-wise ends, the leading edge being located at the leading end in the direction of rotation of the wind power blade and the trailing edge being located at the trailing end in the direction of rotation of the wind power blade during operation of the wind power blade, the second frame being located between the maximum chord of the wind power blade and the trailing edge.
8. The wind turbine blade of any of claims 1 to 5, wherein the first frame comprises a first pressure side beam, a first suction side beam and a first web, the first pressure side beam being attached and connected to the pressure side skin, the first suction side beam being attached and connected to the suction side skin, the first web being connected between the first pressure side beam and the first suction side beam.
9. A wind power blade according to claim 8, wherein there are two of said first webs, and wherein said two first webs are arranged at intervals in the width direction of said wind power blade, respectively.
10. The wind power blade according to claim 8, wherein a first pressure surface beam groove is formed in the pressure surface skin, the first pressure surface beam is located in the first pressure surface beam groove, and the first pressure surface beam is adhered and connected with the groove bottom wall of the first pressure surface beam groove;
the suction surface skin is provided with a first suction surface beam groove, the first suction surface beam is positioned in the first suction surface beam groove, and the first suction surface beam is attached to and connected with the groove bottom wall of the first suction surface beam groove.
11. The wind turbine blade of any of claims 1 to 5, wherein the second frame comprises a second pressure side beam, a second suction side beam and a second web, the second pressure side beam being attached and connected to the pressure side skin, the second suction side beam being attached and connected to the suction side skin, the second web being connected between the second pressure side beam and the second suction side beam.
12. A wind power blade according to claim 11, wherein there are two of said second webs, and wherein said two second webs are arranged at intervals in the width direction of said wind power blade, respectively.
13. The wind power blade according to claim 11, wherein a second pressure face beam groove is formed in the pressure face skin, the second pressure face beam is located in the second pressure face beam groove, and the second pressure face beam is attached to and connected with a groove bottom wall of the second pressure face beam groove;
the suction surface skin is provided with a second suction surface beam groove, the second suction surface beam is positioned in the second suction surface beam groove, and the second suction surface beam is attached to and connected with the groove bottom wall of the second suction surface beam groove.
14. A wind power plant comprising an impeller, said impeller comprising a hub and a plurality of wind power blades according to any one of claims 1 to 13, one end of the wind power blades in a length direction being connected to said hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223552718.0U CN219242092U (en) | 2022-12-29 | 2022-12-29 | Wind power blade and wind power generation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223552718.0U CN219242092U (en) | 2022-12-29 | 2022-12-29 | Wind power blade and wind power generation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219242092U true CN219242092U (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223552718.0U Active CN219242092U (en) | 2022-12-29 | 2022-12-29 | Wind power blade and wind power generation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219242092U (en) |
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2022
- 2022-12-29 CN CN202223552718.0U patent/CN219242092U/en active Active
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