A support arm for a wind turbine blade and a cradle having the same

Abstract

The utility model relates to wind power generation technical field discloses a kind of support arm for wind turbine blade and support with it, comprising: fixed plate, horizontal arrangement, the first end of fixed plate is used to be connected with rotating shaft, the second end of fixed plate is used to be detachably connected with blade;First mounting piece, symmetrically set in the upper and lower end surfaces of fixed plate, first mounting piece is detachably connected with fixed plate, the side end surface of first mounting piece towards away from fixed plate is the streamline of aeronautical wing, the utility model is installed first mounting piece in the upper and end surface of fixed plate respectively, first mounting piece has the streamline of aeronautical wing, the streamline of aeronautical wing is slightly like the shape of water drop, can make object when moving in fluid, reduce the resistance of fluid to object, so that fixed plate can effectively reduce wind resistance when rotating, improve rotation efficiency, reduce energy loss, to prolong the service life of wind turbine blade.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a support arm for wind turbine blades and a bracket having the same. Background Technology

[0002] In the design of vertical axis wind turbines, a corresponding support structure is usually provided between the blades and the main shaft. These support structures inevitably generate a certain amount of wind resistance during the rotation of the wind turbine, which can cause various eddies, turbulence, and disturbances, and these phenomena can negatively affect the performance of the wind turbine.

[0003] In existing technologies, support arms typically employ a rod-like structure with a rectangular or square cross-section. However, when the blades rotate at high speeds, this cross-sectional shape of the support arm can easily increase wind resistance, leading to energy loss. This energy loss not only reduces the efficiency of the wind turbine but may also exacerbate vibration and wear on the blades and the entire wind turbine, thereby affecting its service life and stability. Utility Model Content

[0004] In view of this, the present invention provides a support arm for wind turbine blades and a bracket having the same, so as to solve the problem of high wind resistance of the support arm for wind turbine blades in the prior art.

[0005] In a first aspect, this utility model provides a support arm for wind turbine blades, comprising: a fixing plate, horizontally arranged, wherein a first end of the fixing plate is used to connect to a rotating shaft, and a second end of the fixing plate is used to detachably connect to the blade;

[0006] The first mounting component is symmetrically arranged on the upper and lower end faces of the fixed plate. The first mounting component is detachably connected to the fixed plate. The end face of the first mounting component facing away from the fixed plate has a streamlined shape resembling an aircraft wing.

[0007] By installing first mounting components on the upper and lower surfaces of the fixed plate, the first mounting components have a streamlined shape resembling an aircraft wing. The streamlined shape of an aircraft wing refers to a special shape design of an aircraft wing, which is round in the front and pointed in the back, with a smooth surface and a shape slightly like a water droplet. This reduces the resistance of the fluid to the object when it moves in the fluid, so that the fixed plate can effectively reduce wind resistance when rotating, improve rotation efficiency, reduce energy loss, and thus extend the service life of the wind turbine blades.

[0008] In one optional embodiment, the fixing plate is detachably provided with reinforcing ribs arranged along the length direction of the fixing plate, the reinforcing ribs being disposed on the upper end face and / or lower end face of the fixing plate, and the first mounting member is provided with a groove for inserting and connecting with the reinforcing ribs.

[0009] By setting reinforcing ribs and grooves, the groove of the first mounting component can be inserted into the reinforcing rib to form a stable structure. At the same time, by utilizing the mechanical properties of the reinforcing ribs, the overall rigidity and bending resistance of the support arm are further enhanced, effectively resisting wind impact.

[0010] In one alternative embodiment, the reinforcing rib has two spaced-apart ribs.

[0011] By setting two reinforcing ribs and distributing them evenly on both sides of the fixed plate to form a symmetrical structure, the stress distribution of the support arm is further optimized.

[0012] In one alternative embodiment, the first mounting component includes a reinforcing layer and a covering layer, the reinforcing layer being detachably connected to the fixing plate, and the covering layer being disposed on the end face of the reinforcing layer away from the fixing plate.

[0013] By setting up a reinforcement layer and a cover layer, the reinforcement layer provides additional support, while the cover layer uses low-drag materials to further reduce air resistance and improve the overall structural stability.

[0014] In one alternative embodiment, the reinforcing layer is a wood layer. The wood layer is lightweight and will not place an excessive weight on the support arm after being installed on the mounting plate.

[0015] In one alternative embodiment, the covering layer is a carbon fiber layer. The carbon fiber layer possesses high strength and lightweight properties, effectively reducing overall weight while providing excellent wind resistance.

[0016] In one optional embodiment, the second end of the fixing plate is provided with a first mounting hole and a second mounting hole, and a fastener passes through the first mounting hole and the second mounting hole respectively to be threadedly connected to the blade. The threaded connection ensures a tight fit between the fastener and the blade, improving the stability and durability of the overall structure.

[0017] In one alternative embodiment, the first mounting hole is disposed on the extension path of the first mounting member in the length direction, and the second mounting hole is located on one side of the first mounting hole along the width direction of the first mounting member.

[0018] By setting the first mounting hole on the extension path of the first mounting component along its length and setting the second mounting hole on the side of the first mounting hole, the blade is installed at an angle, that is, the blade is set at an angle to the length direction of the first mounting component. At this time, the power generation efficiency of the blade is higher.

[0019] Secondly, this utility model also provides a bracket, including: a mounting base, wherein at least two support arms as described in any one of the above embodiments are provided on the mounting base.

[0020] By setting multiple support arms on the mounting base, a multi-point support structure is formed, which effectively distributes the force.

[0021] In one alternative embodiment, the mounting base is cylindrical, the support arms are spaced apart on the outer circumferential surface of the mounting base, and the mounting base has mounting holes for connection with the rotating shaft.

[0022] By setting the mounting base to a cylindrical shape, the resistance to rotation of the mounting base is reduced. At the same time, the support arm is installed on the outer circumference of the mounting base. After the mounting base is installed on the rotating shaft, the blades rotate, driving the rotating shaft to rotate and thus generating electricity. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a perspective view of a bracket according to an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 The top view of the bracket shown;

[0026] Figure 3 for Figure 2 Sectional view of AA;

[0027] Figure 4 for Figure 1 Exploded view of the support structure in the middle;

[0028] Figure 5 for Figure 4 Enlarged view of part A in the image;

[0029] Figure 6 for Figure 2 Left view of the bracket in the middle;

[0030] Figure 7 for Figure 6 Enlarged view of part B in the image.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Fixing plate; 2. First mounting component; 3. Reinforcing rib; 4. Reinforcing layer; 5. Covering layer; 6. Groove; 7. First mounting hole; 8. Second mounting hole; 9. Mounting base. Detailed Implementation

[0033] 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.

[0034] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, according to an embodiment of this utility model, in one aspect, a support arm for wind turbine blades is provided, including: a fixing plate 1, which is horizontally arranged. The first end of the fixing plate 1 is used to connect to a rotating shaft, and the second end of the fixing plate 1 is used to detachably connect to the blade. When wind blows over the blade, due to the special shape and design of the blade, wind energy is converted into mechanical energy, causing the blade to begin rotating. This rotational force is transmitted to the fixing plate 1. When the blade rotates, it drives the fixing plate 1 to rotate. A first mounting member 2 is symmetrically arranged on the upper and lower end faces of the fixing plate 1. The first mounting member 2 is detachably connected to the fixing plate 1. The end face of the first mounting member 2 facing away from the fixing plate 1 has a streamlined shape resembling an aircraft wing. The streamlined shape of an aircraft wing refers to a special external design, which is a shape with a rounded front and pointed rear, a smooth surface, and similar to a teardrop, reducing the resistance of the fluid when the object moves in the fluid.

[0036] By installing the first mounting component 2 on the upper and lower surfaces of the fixed plate 1 respectively, the first mounting component 2 has a streamlined shape with an aviation wing, which can effectively reduce wind resistance, improve rotation efficiency, and reduce energy loss when the fixed plate 1 rotates, thereby extending the service life of the wind turbine blades.

[0037] Specifically, the force of the rotating blades is transmitted to the shaft, which begins to rotate, thereby driving the rotor inside the generator to rotate, converting mechanical energy into electrical energy, and thus generating electricity.

[0038] like Figure 4 , Figure 5As shown, in this embodiment, a reinforcing rib 3 is detachably provided on the fixing plate 1 along its length. The reinforcing rib 3 is provided on the upper and lower end faces of the fixing plate 1, and the first mounting member 2 is provided with a groove 6 for inserting and connecting with the reinforcing rib 3. The reinforcing rib 3 is elongated and has a rectangular cross-section, and the shape of the groove 6 corresponds to that of the reinforcing rib 3. By providing the reinforcing rib 3 and the groove 6, the groove 6 of the first mounting member 2 can be inserted into the reinforcing rib 3 to form a stable structure. At the same time, the mechanical properties of the reinforcing rib 3 further enhance the overall rigidity and bending resistance of the support arm, effectively resisting wind impact. It should be noted that, as an alternative implementation, the number and distribution of the reinforcing rib 3 can be adjusted according to actual needs. Alternatively, the reinforcing rib 3 can be provided only on the upper or lower end face of the fixing plate 1.

[0039] Specifically, the fixing plate 1 has through holes along the vertical direction, and multiple through holes are arranged along the extension direction of the reinforcing rib 3. The reinforcing rib 3 has multiple protrusions that can engage with the through holes, thus enabling the installation of the reinforcing rib 3 and the fixing plate 1. During installation, simply align the protrusions of the reinforcing rib 3 with the through holes and insert it to fix the fixing plate 1, simplifying the installation process. Alternatively, bolts can be used to fix the reinforcing rib 3 to the fixing plate 1. Or, the reinforcing rib 3 and the fixing plate 1 can be integrally formed.

[0040] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, in this embodiment, the reinforcing rib 3 has two spaced-apart ribs. By setting the reinforcing rib 3 to two ribs and distributing them on both sides of the fixing plate 1, an asymmetrical structure is formed, further optimizing the force distribution of the support arm. It should be noted that, as an alternative implementation, the reinforcing rib 3 can also be set to multiple ribs, such as three or four. In addition, the reinforcing rib 3 can also be set to a symmetrical structure.

[0041] like Figure 5 As shown, in this embodiment, the first mounting component 2 includes a reinforcing layer 4 and a covering layer 5. The reinforcing layer 4 is detachably connected to the fixing plate 1, and the covering layer 5 is disposed on the end face of the reinforcing layer 4 away from the fixing plate 1. During installation, the reinforcing layer 4 is installed and fixed onto the fixing plate 1, and the covering layer 5 is disposed on the upper end face of the reinforcing layer 4. By providing the reinforcing layer 4 and the covering layer 5, the reinforcing layer 4 provides additional support, and the covering layer 5 uses a low-wind-resistance material to further reduce air resistance and improve the overall structural stability.

[0042] Specifically, a groove 6 is formed between two adjacent reinforcing layers 4. Two reinforcing ribs 3 are provided. After the reinforcing ribs 3 are inserted into the reinforcing layers 4, a reinforcing layer 4 is provided in the middle of the two reinforcing ribs 3, and another reinforcing layer 4 is provided on the side of the reinforcing ribs 3 away from each other. After the reinforcing layers 4 are installed, a covering layer 5 is bonded to the reinforcing layers 4. The combination of the reinforcing layers 4 and the covering layer 5 not only enhances the structural strength but also optimizes the aerodynamic performance and effectively reduces wind resistance.

[0043] like Figure 5 As shown, in this embodiment, the reinforcing layer 4 is a wood layer. The wood layer is lightweight, and its installation on the fixing plate 1 will not make the support arm too heavy. The covering layer 5 is a carbon fiber layer. The carbon fiber layer has high strength and lightweight properties, effectively reducing the overall weight while providing excellent wind resistance. During installation, the reinforcing layer 4 is... It should be noted that, as an alternative implementation, the reinforcing layer 4 can also be made of wood chips. The covering layer 5 can also be made of stainless steel.

[0044] Specifically, an adhesive is provided on the lower end face of the carbon fiber layer, and the carbon fiber layer is bonded and fixed to the reinforcing layer 4 by the adhesive.

[0045] like Figure 1 As shown, in this embodiment, the second end of the fixing plate 1 is provided with a first mounting hole 7 and a second mounting hole 8. Fasteners pass through the first mounting hole 7 and the second mounting hole 8 respectively and are threadedly connected to the blade. During installation, the blade is vertically positioned, with its upper end face abutting against the lower end face of the fixing plate 1. The fasteners are then threaded through the first mounting hole 7 and the second mounting hole 8 and fixedly connected to the upper end of the blade. Simultaneously, the lower end of the blade is fixed in the same way as the upper end, with the lower end abutting against the upper end face of the fixing plate 1. Fasteners pass through the first mounting hole 7 and the second mounting hole 8 and are threadedly connected to the lower end face of the blade. This threaded connection ensures a tight fit between the fasteners and the blade, improving the stability and durability of the overall structure. Specifically, the fastener is a bolt. It should be noted that, as an alternative implementation, the fastener can also be a screw. The fixing plate 1 can also have only one mounting hole, which is an elongated hole. Two bolts are respectively provided at both ends of the elongated mounting hole, and the two bolts pass through the mounting hole and are threadedly connected to the blade.

[0046] like Figure 1As shown, in this embodiment, the first mounting hole 7 is located on the extension path of the first mounting member 2 along its length, and the second mounting hole 8 is located on one side of the first mounting hole 7 along the width direction of the first mounting member 2. That is, the second mounting hole 8 is not directly located on the extension path of the first mounting member 2, but rather on one side of it. When the blades are bolted to the first mounting hole 7 and the second mounting hole 8 respectively, the extension direction of the blades is set at multiple angles to the extension direction of the first mounting member 2. This allows the blades to flexibly adjust their angle according to the wind direction, further optimizing wind energy utilization. By setting the first mounting hole 7 on the extension path of the first mounting member 2 and the second mounting hole 8 to the side of the first mounting hole 7, the blades are tilted after installation, meaning they are at an angle to the length direction of the first mounting member 2, resulting in higher power generation efficiency. Specifically, the positions of the first mounting hole 7 and the second mounting hole 8 can also be adjusted according to actual needs. For example, the first mounting hole 7 and the second mounting hole 8 can be arranged side-by-side, and after the blades are installed, the extension direction of the blades is perpendicular to the first mounting member 2.

[0047] According to an embodiment of this utility model, in another aspect, this utility model also provides a bracket, including: a mounting base 9, on which at least two support arms as described above are provided, a blade is mounted on the second end of each support arm, the first end of each support arm is fixedly connected to the mounting base 9, and the mounting base 9 is detachably connected to a rotating shaft. During installation, two mounting bases 9 are respectively provided at the upper and lower ends of the rotating shaft, and at least two support arms are provided on each mounting base 9, with the second ends of the two support arms respectively connected to two blades. By providing multiple support arms on the mounting base 9, a multi-point support structure is formed, effectively distributing the force. Simultaneously, the airfoil structure of the support arms can reduce wind resistance and improve the rotational stability of the blades.

[0048] Specifically, the support arms are arranged on the outer side of the mounting base 9 and extend radially outward, and there are four support arms.

[0049] As shown in the figure, in this embodiment, the mounting base 9 is cylindrical, and the support arms are spaced apart on the outer circumferential surface of the mounting base 9. The mounting base 9 has mounting holes for connection with the rotating shaft. Bolts pass through the mounting holes and are threadedly connected to the rotating shaft. By making the mounting base 9 cylindrical, the resistance to rotation of the mounting base 9 is reduced. Simultaneously, the support arms are mounted on the outer circumferential surface of the mounting base 9. After the mounting base 9 is installed on the rotating shaft, the blades rotate, driving the rotating shaft to rotate and thus generating electricity.

[0050] Installation method of support arm for wind turbine blades:

[0051] The fixing plate 1 is horizontally positioned, with one end connected to the rotating shaft and the other end designed with a first mounting hole 7 and a second mounting hole 8 for detachable connection with the blade. The blade is threadedly connected to the fixing plate 1 via fasteners passing through the mounting holes. Detachable first mounting components 2 are provided on the upper and lower end faces of the fixing plate 1, and the first mounting components 2 have a streamlined design resembling an aircraft wing. The first mounting components 2 are inserted into and connected to reinforcing ribs 3 on the fixing plate 1 via grooves 6. The reinforcing ribs 3 are elongated strips with rectangular cross-sections, corresponding to the shape of the grooves 6. The number and distribution of the reinforcing ribs 3 can be adjusted according to actual needs.

[0052] Working principle:

[0053] When wind blows over the blades, the streamlined shape of the blades converts wind energy into mechanical energy, driving the blades to rotate. This rotational force is transmitted to the shaft through the fixed plate 1, which in turn drives the rotor inside the generator to rotate, converting mechanical energy into electrical energy to generate electricity. The airfoil design of the support arm generates a certain amount of lift during the rotation of the wind turbine. This lift counteracts the weight of the support arm itself, reducing the weight burden on the support arm during rotation, reducing structural wear, and increasing service life. At the same time, this design also reduces rotational friction and frictional losses.

[0054] 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 support arm for wind turbine blades, characterized in that, include: A fixing plate (1) is horizontally arranged. The first end of the fixing plate (1) is used to connect with the rotating shaft, and the second end of the fixing plate (1) is used to detachably connect with the blade. The first mounting component (2) is symmetrically arranged on the upper and lower end faces of the fixed plate (1). The first mounting component (2) is detachably connected to the fixed plate (1). The end face of the first mounting component (2) facing away from the fixed plate (1) is streamlined like an aircraft wing.

2. The support arm for wind turbine blades according to claim 1, characterized in that, The fixing plate (1) is detachably provided with a reinforcing rib (3) arranged along the length direction of the fixing plate (1). The reinforcing rib (3) is arranged on the upper end face and / or lower end face of the fixing plate (1). The first mounting member (2) is provided with a groove (6) for inserting and connecting with the reinforcing rib (3).

3. The support arm for wind turbine blades according to claim 2, characterized in that, The reinforcing rib (3) has two spaced-apart ribs.

4. The support arm for wind turbine blades according to any one of claims 1-3, characterized in that, The first mounting component (2) includes a reinforcing layer (4) and a covering layer (5). The reinforcing layer (4) is detachably connected to the fixing plate (1), and the covering layer (5) is disposed on the side end face of the reinforcing layer (4) away from the fixing plate (1).

5. The support arm for wind turbine blades according to claim 4, characterized in that, The reinforcing layer (4) is a wood layer.

6. The support arm for wind turbine blades according to claim 4, characterized in that, The covering layer (5) is a carbon fiber layer.

7. The support arm for wind turbine blades according to any one of claims 1-3, characterized in that, The second end of the fixing plate (1) is provided with a first mounting hole (7) and a second mounting hole (8), and the fasteners pass through the first mounting hole (7) and the second mounting hole (8) respectively to be threadedly connected to the blade.

8. The support arm for wind turbine blades according to claim 7, characterized in that, The first mounting hole (7) is located on the extension path of the first mounting member (2) along its length direction, and the second mounting hole (8) is located on one side of the first mounting hole (7) along the width direction of the first mounting member (2).

9. A stent, characterized in that, include: Mounting base (9), wherein at least two support arms as described in any one of claims 1-8 are provided on the mounting base (9).

10. The stent according to claim 9, characterized in that, The mounting base (9) is cylindrical, and the support arms are spaced apart on the outer circumferential surface of the mounting base (9). The mounting base (9) has mounting holes that are connected to the rotating shaft.

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