A vertical axis wind turbine blade

Abstract

The utility model relates to wind power generation technical field discloses a kind of vertical axis wind generator blades, comprising: keel;Cable-stayed device is provided with multiple, multiple cable-stayed device is along the length direction interval of keel Setting;First flange plate is parallel interval and set in the side of keel;Second flange plate is parallel interval and set in the other side away from second flange plate;Skin is set on cable-stayed device, first flange plate and second flange plate, the utility model is installed cable-stayed device on keel, first flange plate and second flange plate are respectively installed in the both ends of cable-stayed device, and the frame of installing skin is formed by keel, cable-stayed device, first flange plate and second flange plate, after skin is installed to position at this time, first flange plate and second flange plate are set in the gap position between adjacent two cable-stayed device, at this time, skin is effectively supported at the gap between adjacent cable-stayed device, avoids deformation, improves the overall strength and stability of blade.

Description

Technical Field

[0001] This utility model relates to the field of generator blade technology, specifically to a vertical axis wind turbine blade. Background Technology

[0002] Vertical axis wind turbine blades are a key component of vertical axis wind turbines. Unlike traditional horizontal axis wind turbines, vertical axis wind turbines have their rotation axis perpendicular to the ground. The function of vertical axis wind turbine blades is to capture wind energy. When wind blows across these blades, the blades are subjected to wind force, which drives the generator shaft to rotate, converting wind energy into mechanical energy, which is then further converted into electrical energy by the generator.

[0003] Chinese patent document CN206753811U discloses a blade structure for a vertical axis wind turbine, comprising: a frame, the frame having a central beam, on which long reinforcing ribs and short reinforcing ribs are mounted. The long and short reinforcing ribs are symmetrically fixed on both sides of the central beam. A first side skin and a second side skin are provided on the long and short reinforcing ribs.

[0004] However, in the existing technology, since the long and short reinforcing ribs are spaced apart along the length of the central beam, there is a gap between two adjacent long or short reinforcing ribs. After the first and second side skins are installed on the long and short reinforcing ribs, there is no support for the first and second side skins in the gap between two adjacent long or short reinforcing ribs. As a result, after long-term operation, the first and second side skins are prone to deformation, which affects the overall strength and stability of the blades and reduces the power generation efficiency and service life of the vertical axis wind turbine. Utility Model Content

[0005] In view of this, the present invention provides a vertical axis wind turbine blade to solve the problem of poor support of the blade skin in the prior art, which leads to easy deformation.

[0006] In a first aspect, this utility model provides a vertical axis wind turbine blade, comprising: a keel;

[0007] Multiple inclined cable tie devices are provided, and the inclined cable tie devices are arranged perpendicularly to the keel, with the multiple inclined cable tie devices spaced apart along the length direction of the keel;

[0008] The first flange plate is arranged parallel to each other on one side of the keel, and the first ends of the plurality of inclined tie devices are detachably connected to the first flange plate.

[0009] The second flange plate is arranged in parallel at intervals on the other side away from the second flange plate, and the second ends of the plurality of inclined cable devices are detachably connected to the second flange plate;

[0010] The skin is disposed on the cable tie, the first flange, and the second flange.

[0011] By installing a slant bracing device on the keel, and installing a first flange plate and a second flange plate at both ends of the slant bracing device, a frame for installing the skin is formed by the keel, the slant bracing device, the first flange plate, and the second flange plate. After the skin is installed in position, the first flange plate and the second flange plate are positioned in the gap between two adjacent slant bracing devices. At this time, the skin is effectively supported in the gap between adjacent slant bracing devices, avoiding deformation and improving the overall strength and stability of the blade.

[0012] In one optional embodiment, the keel includes: a first main beam and a second main beam, wherein the first main beam and the second main beam are arranged in parallel and spaced apart;

[0013] The first flange is disposed on the side of the first main beam away from the second main beam, and the second flange is disposed on the side of the second main beam away from the first main beam.

[0014] By setting the keel as the first and second main beams, the load-bearing capacity of the keel is further enhanced, ensuring that the blade structure remains stable under strong wind conditions.

[0015] In one alternative implementation, the diameter of the first main beam is larger than the diameter of the second main beam.

[0016] By setting the diameter of the first main beam to be larger than that of the second main beam, the first main beam bears a greater load, further improving the overall rigidity and wind resistance of the blades.

[0017] In one optional embodiment, threaded holes or threaded posts for connecting to the wind turbine are respectively provided at both ends of the first main beam and the second main beam along their length.

[0018] By setting threaded holes or threaded posts at both ends of the first and second main beams along their length, the connection between the blades and the wind turbine can be achieved, making the connection more convenient.

[0019] In one alternative embodiment, the inclined cable device is provided with at least one weight-reducing hole.

[0020] By setting weight-reducing holes, the overall weight of the blades is reduced without affecting the support performance.

[0021] In one optional embodiment, the two ends of the cable-stayed device along its length are respectively provided with an inwardly recessed first groove and a second groove, and the first flange plate and the second flange plate are respectively inserted into the first groove and the second groove.

[0022] By setting the first groove and the second groove, the first flange plate and the second flange plate are inserted into the first groove and the second groove, forming a more robust connection structure, which effectively prevents the first flange plate and the second flange plate from shifting under strong wind.

[0023] In one alternative embodiment, the cable-stayed device has a first outer side and a second outer side extending from a first end of the cable-stayed device toward a second end, the first outer side and the second outer side being streamlined.

[0024] By making the first and second outer surfaces of the inclined plane device streamlined, wind resistance is reduced, the aerodynamic performance of the blades is improved, and the wind energy utilization efficiency is further enhanced.

[0025] In one alternative embodiment, the device further includes: an auxiliary component, wherein multiple auxiliary components are provided, the auxiliary components are perpendicular to the inclined cable device, the auxiliary components are located on the first outer side and the second outer side of the inclined cable device, and a portion of the skin abuts against the auxiliary component.

[0026] By setting auxiliary components and installing them on the first and second outer surfaces, the stability of the cable tie device is further enhanced. At the same time, after the skin is installed on the cable tie device, the auxiliary components can also support the skin, making the skin less prone to deformation.

[0027] In one optional embodiment, the cable-stayed device is provided with a plurality of through holes spaced apart along the outer edge of the cable-stayed device, and the auxiliary component is inserted into the through holes.

[0028] By setting through holes, the auxiliary components are inserted into the through holes, forming a tighter fixing structure, which effectively prevents the auxiliary components from vibrating in strong winds, while ensuring that the auxiliary components can support the skin when it is installed.

[0029] In one optional embodiment, the diagonal bracing devices installed at both ends of the keel along its length are respectively provided with a central hole, the central hole being located at the middle position along the length of the diagonal bracing device.

[0030] By setting a central hole, it is easy to install and fix the cable-stayed device to the wind turbine, which enhances the stability of the overall structure. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a perspective view of a vertical axis wind turbine blade according to an embodiment of the present invention.

[0033] Figure 2 for Figure 1 The image shown is a three-dimensional view of the blade with its skin hidden.

[0034] Figure 3 for Figure 2 Exploded view of the blades in the image;

[0035] Figure 4 for Figure 3 A three-dimensional diagram of the inclined plane device.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Keel; 2. Diagonal bracing device; 3. First flange plate; 4. Second flange plate; 5. Skin; 6. Weight reduction hole; 7. First groove; 8. Second groove; 9. First outer surface; 10. Second outer surface; 11. Auxiliary component; 12. Center hole; 13. Through hole. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0040] like Figure 1 , Figure 2 , Figure 3As shown, according to an embodiment of this utility model, a vertical axis wind turbine blade is provided, comprising: a keel 1 and inclined cable devices 2; multiple inclined cable devices 2 are provided, and the inclined cable devices 2 are arranged perpendicularly to the keel 1, that is, the extension direction of the inclined cable devices 2 is perpendicular to the extension direction of the keel 1. Multiple inclined cable devices 2 are spaced apart along the length direction of the keel 1; a first flange plate 3 is arranged parallel to and spaced apart from the keel 1, the first flange plate 3 is located on one side of the keel 1, and the first ends of the multiple inclined cable devices 2 are detachably connected to the first flange plate 3. A second flange plate 4 is arranged parallel to and spaced apart from the keel 1, the second flange plate 4 is located on the other side of the keel 1 away from the first flange plate 3, and the second ends of the multiple inclined cable devices 2 are detachably connected to the second flange plate 4; a skin 5 is provided on the inclined cable devices 2, the first flange plate 3, and the second flange plate 4. The first end and the second end of the inclined cable device 2 refer to the two ends along the length direction of the inclined cable device 2.

[0041] By installing a diagonal bracing device 2 on the keel 1, and installing a first flange plate 3 and a second flange plate 4 at both ends of the diagonal bracing device 2, a frame for installing the skin 5 is formed by the keel 1, the diagonal bracing device 2, the first flange plate 3 and the second flange plate 4. After the skin 5 is installed in place, the first flange plate 3 and the second flange plate 4 are positioned in the gap between two adjacent diagonal bracing devices 2. At this time, the skin 5 is effectively supported in the gap between the adjacent diagonal bracing devices 2, avoiding deformation and improving the overall strength and stability of the blade.

[0042] Specifically, skin 5 is made of a carbon fiber layer. Alternatively, skin 5 can be made of other materials, such as a fiberglass layer. Skin 5 is tightly bonded to the cable tie 2 and the airfoil plates using adhesives, ensuring structural strength. The carbon fiber layer has excellent tensile strength and lightweight properties, significantly improving the blade's wind resistance.

[0043] Specifically, both the first flange 3 and the second flange 4 are elongated plate-like structures. The lengths of the first flange 3 and the second flange 4 are the same as the length of the keel 1, and the widths of the first flange 3 and the second flange 4 are designed according to actual needs to ensure a stable connection with the cable-stayed device 2. Alternatively, multiple first flange 3 and second flange 4 can be used, with each first flange 3 and second flange 4 positioned between two adjacent cable-stayed devices 2, thus supporting the skin 5. This design facilitates the manufacture of standardized blades with different airfoils. The structure uses lightweight aluminum alloy, carbon fiber, or fiberglass, resulting in a lightweight yet strong composite material blade.

[0044] like Figure 2As shown, in this embodiment, the keel 1 includes a first main beam and a second main beam, which are arranged parallel to each other and spaced apart. The first and second main beams are cylindrical. A first flange plate 3 is disposed on the side of the first main beam away from the second main beam, and a second flange plate 4 is disposed on the side of the second main beam away from the first main beam. By setting the keel 1 as a first main beam and a second main beam, the first and second main beams further enhance the load-bearing capacity of the keel 1, ensuring that the blade structure remains stable under strong wind conditions. It should be noted that, as an alternative implementation, the first and second main beams can also be square. It should also be noted that, as an alternative implementation, only one keel 1 can be provided, i.e., only the first main beam is provided, and the cable tie 2 is disposed on the first main beam.

[0045] Specifically, the cable-stayed device 2 is a plate-like structure. The first and second main beams are positioned perpendicular to the cable-stayed device 2. Two through holes 13 are provided on the cable-stayed device 2, spaced apart along its length. The first and second main beams pass through the two through holes 13, respectively, and the diameter of the through holes 13 is the same as the outer diameter of the first and second main beams. The cable-stayed device 2 is tightly fixed to the main beams through the through holes 13, ensuring the structure remains stable and improving overall rigidity.

[0046] like Figure 2 As shown, in this embodiment, the diameter of the first main beam is larger than the diameter of the second main beam. By setting the diameter of the first main beam to be larger than that of the second main beam, the first main beam bears a greater load, further improving the overall rigidity and wind resistance of the blade. It should be noted that, as an alternative implementation, the diameters of the first and second main beams can also be set to be the same.

[0047] Specifically, in this embodiment, the diameter of the first main beam is 15mm, and the diameter of the second main beam is 10mm. The diameters of the first and second main beams can be modified according to actual needs.

[0048] like Figure 2As shown, in this embodiment, threaded holes for connecting to the wind turbine are respectively provided at both ends of the first and second main beams along their length. The wind turbine includes a support arm, the structure of which is existing technology. The support arm typically has through holes. After the through holes of the support arm are aligned with the threaded holes of the first and second main beams, bolts are used to thread the through holes of the support arm into the threaded holes, thereby mounting the vertical axis wind turbine blades of this embodiment onto the support arm for fixation. By providing threaded holes at both ends of the first and second main beams along their length, the connection between the blades and the wind turbine can be achieved, making the connection more convenient. It should be noted that, as an alternative implementation, connecting columns can also be provided on the first and second main beams. After the connecting column passes through the through holes of the support arm, it is fixed by screwing a nut onto the external thread of the connecting column.

[0049] Specifically, the wind turbine rotor, also known as the impeller, is one of the key components of a wind turbine generator set. It mainly consists of blades, support arms, and a hub. When wind blows onto the rotor, the blades utilize their unique aerodynamic shape to convert wind energy into mechanical force, causing the rotor to rotate around the hub's central axis. This, in turn, drives the generator to rotate, converting mechanical energy into electrical energy. In this embodiment, the vertical axis wind turbine blades are installed onto the rotor using bolts passed through threaded holes in the rotor.

[0050] like Figure 2 , Figure 3 As shown, in this embodiment, the inclined cable device 2 is provided with at least one weight-reducing hole 6, and each inclined cable device 2 is provided with four weight-reducing holes 6, two of which are located between the first main beam and the second main beam, and the other two are located on the outer sides of the first main beam and the second main beam, respectively. By providing weight-reducing holes 6, the overall weight of the blade is reduced without affecting the support performance. It should be noted that the number of weight-reducing holes 6 can also be other, such as two, three, etc. The shape of the weight-reducing holes 6 can be circular, square, elliptical, etc.

[0051] like Figure 3As shown, in this embodiment, the two ends of the inclined cable device 2 along its length are respectively provided with an inwardly recessed first groove 7 and a second groove 8. "Inwardly" refers to the direction in which the two ends of the inclined cable device 2 extend towards the middle position of the inclined cable device 2. The first flange plate 3 and the second flange plate 4 are respectively inserted into the first groove 7 and the second groove 8. After insertion, the first flange plate 3 is threadedly connected to the inclined cable device 2 by bolts passing through it, thereby fixing the first flange plate 3. The installation of the second flange plate 4 is similar to that of the first flange plate 3. By providing the first groove 7 and the second groove 8, after the first flange plate 3 and the second flange plate 4 are inserted into the first groove 7 and the second groove 8, a more robust connection structure is formed, effectively preventing displacement of the first flange plate 3 and the second flange plate 4 under strong winds. It should be noted that, as an alternative implementation, the first groove 7 and the second groove 8 can also be provided on the first flange plate 3 and the second flange plate 4, and the two ends of the inclined cable device 2 can be inserted into the first groove 7 and the second groove 8.

[0052] like Figure 1 As shown, in this embodiment, the inclined plane device 2 has lift-type blades. The inclined plane device 2 has a streamlined design, meaning that when the skin 5 is installed on the inclined plane device 2, the blades are streamlined. This streamlined design allows the blades to generate better aerodynamic performance during airflow, reducing energy loss and improving the overall performance of the equipment. The inclined plane device 2 has a first outer surface 9 and a second outer surface 10 extending from a first end to a second end. The first outer surface 9 and the second outer surface 10 are streamlined, with the side facing the first end being round and the side facing the second end being pointed. The surfaces of the first outer surface 9 and the second outer surface 10 are smooth, making the inclined plane device 2 slightly resemble a teardrop shape. By making the first outer surface 9 and the second outer surface 10 of the inclined plane device 2 streamlined, wind resistance is reduced, the aerodynamic performance of the blades is improved, and wind energy utilization efficiency is further enhanced. It should be noted that, as an alternative implementation, the inclined plane device 2 can also be configured as a straight wing with no obvious sweep angle, and the planar shape is rectangular, trapezoidal or semi-elliptical. Its structure is existing technology and will not be described in detail in this embodiment.

[0053] like Figure 2 , Figure 3As shown, in this embodiment, it further includes: auxiliary components 11, of which multiple auxiliary components 11 are provided. The auxiliary components 11 are perpendicular to the inclined cable device 2. The inclined cable device 2 has a first outer surface 9 and a second outer surface 10. The first outer surface 9 and the second outer surface 10 are arc-shaped surfaces, forming the streamlined outer edge of the inclined cable device 2. The auxiliary components 11 are provided on the inclined cable device 2 along the extending direction of the first outer surface 9 and the second outer surface 10. When installing the skin 5, a portion of the skin 5 abuts against the auxiliary component 11. The auxiliary component 11 is a cylindrical steel wire, and the extending direction of the auxiliary component 11 is perpendicular to the plate surface of the inclined cable device 2. The length of the auxiliary component 11 is equal to the length of the keel 1. By providing the auxiliary components 11, after the auxiliary components 11 are installed on the first outer surface 9 and the second outer surface 10, the stability of the inclined cable device 2 is further enhanced. At the same time, after the skin 5 is installed on the inclined cable device 2, the auxiliary components 11 can also support the skin 5, making the skin 5 less prone to deformation. It should be noted that, as an alternative implementation, the auxiliary component 11 can be omitted, and the skin 5 can also be installed on the cable tie device 2.

[0054] Specifically, there are 20 auxiliary components 11, 10 inclined pull devices 2 are located near the first outer side 9, and 10 are located near the second outer side 10.

[0055] like Figure 3 , Figure 4 As shown, in this embodiment, multiple through holes 13 are provided on the inclined cable device 2 near the outer edges of the first outer surface 9 and the second outer surface 10. The through holes 13 penetrate the inclined cable device 2, and the axis of the through holes 13 is perpendicular to the inclined cable device 2. The auxiliary component 11 is inserted into the through hole 13. After the auxiliary component 11 is inserted into the through hole 13, the outer end face of the auxiliary component 11 is flush with the first outer surface 9 or the second outer surface 10, so that after the skin 5 is installed, the skin 5 can fit tightly against the inclined cable device 2 and the auxiliary component 11, avoiding airflow disturbance caused by uneven installation. By setting the through holes 13, a tighter fixing structure is formed after the auxiliary component 11 is inserted into the through holes 13, effectively preventing the vibration of the auxiliary component 11 in strong winds. It should be noted that, as an alternative implementation, a slot can also be provided, with an opening at the top, through which the auxiliary component 11 is inserted into the slot for fixing.

[0056] Specifically, the diameter of through hole 13 is 1.5mm.

[0057] like Figure 3As shown, in this embodiment, the inclined tie rods 2 installed at both ends of the keel 1 along its length are respectively provided with center holes 12, which are circular holes. The center holes 12 are located at the middle position along the length of the inclined tie rods 2. The center holes 12 are used to install and fix the wind turbine to the wind turbine with bolts. By providing center holes 12, it is convenient to install and fix the inclined tie rods 2 to the wind turbine, thereby enhancing the stability of the overall structure. It should be noted that, as an alternative implementation, the center holes 12 may not be provided, and the wind turbine may be installed through the threaded holes of the first main beam and the second main beam.

[0058] Installation method of vertical axis wind turbine blades:

[0059] First, the first and second main beams of the keel 1 are arranged parallel and spaced apart, ensuring they are perpendicular to the cable tie 2. The cable tie 2 is then spaced apart along the length of the keel 1 and securely fixed to the first and second main beams through through holes 13. A first flange plate 3 is installed on the side of the first main beam away from the second main beam, and a second flange plate 4 is installed on the side of the second main beam away from the first main beam, ensuring that the first flange plate 3 and the second flange plate 4 are connected to the first and second ends of the cable tie 2, respectively. An auxiliary component 11 is inserted into the through hole 13 of the cable tie 2. The vertical axis wind turbine blades are then mounted and fixed to the wind turbine by bolts passing through threaded holes on the rotor. The skin 5 is then applied to the cable tie 2, the first flange plate 3, the second flange plate 4, and the auxiliary component 11, and bonded tightly with adhesive.

[0060] Working principle of vertical axis wind turbine blades:

[0061] When wind blows onto the blades of a vertical axis wind turbine, the blades utilize their aerodynamic shape to convert wind energy into mechanical force acting on them. The wind energy drives the blades to rotate, which in turn drives the generator to rotate. During rotation, the first flange 3, the second flange 4, and the auxiliary component 11 provide effective support for the skin 5, preventing deformation and improving the overall strength and stability of the blades.

[0062] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vertical axis wind turbine blade, characterized in that, include: Keel (1); Multiple inclined bracing devices (2) are provided. The inclined bracing devices (2) are arranged perpendicularly to the keel (1), and the multiple inclined bracing devices (2) are spaced apart along the length direction of the keel (1). The first flange plate (3) is arranged parallel to each other on one side of the keel (1), and the first ends of the plurality of inclined tie devices (2) are detachably connected to the first flange plate (3); The second flange plate (4) is arranged in parallel at intervals on the other side away from the second flange plate (4), and the second ends of the plurality of inclined pull devices (2) are detachably connected to the second flange plate (4); Skin (5) is provided on the cable tie (2), the first flange plate (3) and the second flange plate (4).

2. The vertical axis wind turbine blade according to claim 1, characterized in that, The keel (1) includes: a first main beam and a second main beam, wherein the first main beam and the second main beam are arranged in parallel and spaced apart; The first flange plate (3) is disposed on the side of the first main beam away from the second main beam, and the second flange plate (4) is disposed on the side of the second main beam away from the first main beam.

3. The vertical axis wind turbine blade according to claim 2, characterized in that, The diameter of the first main beam is larger than the diameter of the second main beam.

4. The vertical axis wind turbine blade according to claim 2, characterized in that, Both ends of the first main beam and the second main beam along their length are respectively provided with threaded holes or threaded posts for connecting with the wind turbine.

5. The vertical axis wind turbine blade according to any one of claims 1-4, characterized in that, The inclined cable device (2) is provided with at least one weight reduction hole (6).

6. The vertical axis wind turbine blade according to any one of claims 1-4, characterized in that, The inclined cable device (2) has an inwardly recessed first groove (7) and second groove (8) at both ends along its length, and the first flange plate (3) and the second flange plate (4) are respectively inserted into the first groove (7) and the second groove (8).

7. The vertical axis wind turbine blade according to any one of claims 1-4, characterized in that, The cable-stayed device (2) has a first outer side (9) and a second outer side (10) extending from a first end toward a second end of the cable-stayed device (2), and the first outer side (9) and the second outer side (10) are streamlined.

8. The vertical axis wind turbine blade according to any one of claims 1-4, characterized in that, Also includes: Auxiliary component (11), wherein multiple auxiliary components (11) are provided, the auxiliary components (11) are perpendicular to the inclined pull device (2), and multiple auxiliary components (11) are spaced apart along the outer edge of the inclined pull device (2), and a portion of the skin (5) abuts against the auxiliary component (11).

9. The vertical axis wind turbine blade according to claim 8, characterized in that, The inclined cable device (2) is provided with a plurality of through holes (13) at intervals along the outer edge of the inclined cable device (2), and the auxiliary component (11) is inserted into the through holes (13).

10. The vertical axis wind turbine blade according to any one of claims 1-4, characterized in that, The inclined tie devices (2) installed at both ends of the keel (1) along the length direction are respectively provided with a center hole (12), and the center hole (12) is located at the middle position along the length direction of the inclined tie device (2).

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