Anti-deformation blade root structure of low-wind-speed wind power blade

Abstract

The utility model discloses an anti-deformation blade root structure of a low-wind-speed wind power blade. The anti-deformation blade root structure comprises a fixing ring, a connecting rod and an inserting rod. The number of the fixing rings is two, the fixing rings are arranged on a rotating shaft of the fan in a sleeving mode, the two fixing rings are located on the two sides of the blade root correspondingly, and the sides, close to each other, of the two fixing rings can abut against the two sides of the blade root correspondingly; the multiple connecting rods are evenly distributed in the circumferential direction of the fixing rings at intervals, and the two ends of each connecting rod are connected with the two fixing rings correspondingly. An inserting hole is formed in the fixing ring in the radial direction, a corresponding through hole is formed in the surface of a rotating shaft of the fan, the inserting rod can penetrate through the inserting hole and the through hole, and threads are arranged at the end of the inserting rod. According to the anti-deformation blade root structure of the low-wind-speed wind power blade, the blade root can be limited in multiple directions through the fixing ring and the connecting rod, so that the blade root is prevented from violently shaking, and the good effect of preventing the blade root from deforming is achieved. And the structure is fixed on the rotating shaft, so that the structure is not loosened due to the rotation of the fan, and the structure has relatively high stability.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blades, and particularly relates to an anti-deformation blade root structure for low-wind-speed wind turbine blades. Background Art

[0002] Fan blades are one of the core components of wind turbines. The quality of their design will directly affect the performance and efficiency of the wind turbines. The structure of the blades mainly includes the root, the outer shell, and the keel. The root is the key part connecting the wind turbine and the blade, and usually bolt connection is adopted to ensure stability and facilitate disassembly and assembly.

[0003] Due to the long overall length of the blade, under the influence of factors such as temperature and gravity, the blade root is prone to deformation. Especially for the blades used in low-wind-speed power generation, the lightweight-designed blades are easily loosened due to shaking, affecting the connection strength between the wind turbine and the blade, and even leading to fracture in severe cases. Therefore, anti-deformation protection for the blade root is required. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides an anti-deformation blade root structure for low-wind-speed wind turbine blades, which can improve the anti-deformation ability of the blade root part.

[0005] To achieve the above object, the utility model is realized by the following technical solutions: an anti-deformation blade root structure for low-wind-speed wind turbine blades, including a fixing ring, a connecting rod, and a plug rod;

[0006] There are two fixing rings, both sleeved on the rotating shaft of the wind turbine. The two fixing rings are respectively located on both sides of the blade root, and the mutually close sides can respectively abut against both sides of the blade root;

[0007] There are multiple connecting rods, which are evenly distributed around the circumference of the fixing ring at intervals, and both ends are respectively connected to the two fixing rings;

[0008] The fixing ring is provided with insertion holes along the radial direction, and corresponding through holes are opened on the surface of the rotating shaft of the wind turbine. The plug rod can pass through the insertion hole and the through hole, and the end is provided with threads.

[0009] First, the fixing rings are sleeved on the rotating shaft of the wind turbine and are respectively located on both sides of the blade root. Then, the blade root is installed on the rotating shaft and is located between the two fixing rings. Subsequently, after the plug rod passes through the fixing ring and the rotating shaft in sequence, it is fixed by a fastening bolt, and the fixing ring can be fixedly installed on the rotating shaft to limit the blade root from both sides to prevent the blade root from shaking and deforming.

[0010] The beneficial effects of the anti-deformation blade root structure of the above-mentioned low-wind-speed wind turbine blades are as follows: By arranging fixing rings on both sides of the blade root, it can be limited, thus avoiding violent shaking and achieving the effect of anti-deformation. And the fixing rings are installed on the rotating shaft, with strong stability and not easily loosening due to the influence of the blades.

[0011] Furthermore, the connecting rod is detachably connected to the fixing ring.

[0012] The detachable connection can facilitate the connection of the two fixing rings after the installation of the blade root is completed.

[0013] Furthermore, threaded holes are provided on the fixing ring, and threads are provided at both ends of the connecting rod.

[0014] Both ends of the connecting rod are connected to the threaded holes on the fixing ring through threads, having good connection stability.

[0015] Furthermore, the adjacent sides of the connecting rods can respectively abut against both sides of the blade root.

[0016] The connecting rods can limit the blade root from both sides, thus avoiding violent shaking of the blade root in this direction and further enhancing the anti-deformation effect.

[0017] Furthermore, the fixing rings and the connecting rods form a rectangular frame structure on the outside of the blade root and can abut against the outside of the blade root.

[0018] By forming a rectangular frame structure with the fixing rings and the connecting rods, the blade root is limited and protected from all around, making it difficult for the blade root to shake violently, thus avoiding deformation.

[0019] Furthermore, the jacks are arranged radially along the fixing ring and are symmetrically arranged so that the plug rods can penetrate the fixing ring. Threads are provided at both ends of the plug rods and are connected with fastening bolts.

[0020] After the plug rod is inserted radially along the fixing ring and penetrates the fixing ring and the rotating shaft, both ends are fixed by fastening bolts, thereby firmly installing the fixing ring on the rotating shaft.

[0021] Furthermore, two plug rods are inserted into each fixing ring. The diameters of the two plug rods are different. A hole is provided in the middle of one of the plug rods, and the other plug rod can pass through the hole. The two plug rods are arranged in a cross shape.

[0022] The two plug rods are arranged in a cross shape, which can firmly install the fixing ring on the rotating shaft. Description of the Drawings

[0023] To more clearly illustrate the specific embodiments of the present invention, the following will briefly introduce the drawings required for the specific embodiments. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0024] Figure 1 The front view of the anti-deformation blade root structure of a low-wind-speed wind turbine blade provided by an embodiment of the present invention;

[0025] Figure 2 is Figure 1 The side view of the anti-deformation blade root structure of the low-wind-speed wind turbine blade shown;

[0026] Reference numerals:

[0027] 1 - Rotating shaft, 2 - Blade root, 10 - Fixed ring, 20 - Connecting rod, 30 - Plug rod, 31 - Fastening bolt. Specific embodiments

[0028] The following will describe in detail the embodiments of the technical solutions of the present invention with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0029] Please refer to Figure 1 and Figure 2 , the present invention provides an anti-deformation blade root structure for a low-wind-speed wind turbine blade, including a fixed ring 10, a connecting rod 20 and a plug rod 30. The fixed ring 10 is installed on the rotating shaft 1 of the fan, and together with the connecting rod 20, it will limit the blade root 2, thereby preventing the blade root from deforming.

[0030] Specifically, there are two fixed rings 10, both of which are sleeved on the rotating shaft 1 of the fan. The two fixed rings are respectively located on both sides of the blade root 2, and the mutually adjacent sides can respectively abut against both sides of the blade root 2. There are multiple connecting rods 20, which are distributed circumferentially around the fixed ring 10 at equal intervals, and both ends are respectively connected to the two fixed rings. The fixed ring 10 is provided with insertion holes along the radial direction, and corresponding through holes are provided on the surface of the rotating shaft 1. The plug rod 30 can pass through the insertion holes and the through holes, and the end is provided with a thread.

[0031] First, the fixed ring 10 is sleeved on the rotating shaft 1 of the fan and is respectively located on both sides of the blade root 2. Then, the blade root 2 is installed on the rotating shaft 1 and is located between the two fixed rings. Subsequently, the plug rod 30 is passed through the fixed ring 10 and the rotating shaft 1, and then fixed by the fastening bolt 31, so that the fixed ring can be fixedly installed on the rotating shaft, and the blade root can be limited from both sides to prevent the blade root from shaking violently and causing deformation. And the fixed ring is installed on the rotating shaft, with strong stability and not easily loosening under the influence of the blade.

[0032] Specifically, the connecting rod 20 is detachably connected to the fixing ring 10. Threaded holes are provided on the fixing ring, and threads are provided at both ends of the connecting rod 20. After the blade root is installed on the rotating shaft, the two ends of the connecting rod 20 can be connected to the threaded holes on the fixing ring through threads, and further fixed by bolts, thus having better connection stability.

[0033] In this embodiment, taking the common three-blade as an example, there are 3 groups of 6 connecting rods 20 in total. The sides of the two connecting rods 20 in each group that are close to each other can respectively abut against both sides of the blade root, and form a rectangular frame structure with the fixing ring 10 on the outside of the blade root 2, and can abut against the four sides of the blade root. This structure can limit and protect the blade root from all around, making it difficult for the blade root to shake violently, and further improving the anti-deformation effect.

[0034] Specifically, the jacks are opened along the radial direction of the fixing ring and are symmetrically arranged, so that the plug rods 30 can penetrate through the fixing ring 10. Threads are provided at both ends of the plug rods 30, and fastening bolts 31 are connected. In this embodiment, two plug rods are inserted into the fixing ring. The diameters of the two plug rods are different. A hole is opened in the middle of one of the plug rods, and the other plug rod can pass through the hole. The two plug rods 30 are arranged in a cross shape. After the plug rods 30 penetrate through the fixing ring 10 and the rotating shaft 1, both ends are fixed by the fastening bolts 31, so that the fixing ring can be stably installed on the rotating shaft, and the two plug rods 30 are arranged in a cross shape, having strong stability.

[0035] The working principle of the above anti-deformation blade root structure of a low-wind-speed wind turbine blade is as follows: First, the fixing ring 10 is sleeved on the rotating shaft 1 of the wind turbine, and then the blade root 2 is installed on the rotating shaft 1 and located between the two fixing rings. The plug rods 30 are passed through the fixing ring 10 and the rotating shaft 1 and fixed by the fastening bolts 31, and then the fixing ring can be fixedly installed on the rotating shaft. Then the connecting rod 20 is passed through the fixing ring 10 and fixed by bolts, and then the two fixing rings can be connected and fixed to each other and form a rectangular frame with the fixing ring 10, so as to limit the blade root 2 from all around. It should be noted that there is a certain gap between both the fixing ring 10 and the connecting rod 20 and the blade root, which is used for the shaking and deformation of the blade root within an acceptable range.

[0036] Using the above anti-deformation blade root structure of a low-wind-speed wind turbine blade, through the frame structure formed by the fixing ring and the connecting rod, the blade root can be limited from multiple directions to avoid violent shaking of the blade root, thus having a good effect of preventing the blade root from deforming. And this structure is fixed on the rotating shaft and will not become loose due to the rotation of the wind turbine, having strong stability.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A deformation-proof root structure for a low-wind-speed wind turbine blade, characterized in that: It includes a fixed ring, a connecting rod and a plug rod; There are two of the fixed rings, both of which are sleeved on the rotating shaft of the fan. The two fixed rings are respectively located on both sides of the blade root, and the mutually adjacent sides can respectively abut against both sides of the blade root; There are multiple connecting rods, which are arranged circumferentially around the fixed ring at equal intervals and are respectively connected to the two fixed rings at both ends; A jack is radially opened on the fixed ring, and a corresponding through hole is opened on the surface of the rotating shaft of the fan. The plug rod can pass through the jack and the through hole, and a thread is provided at the end.

2. The anti-deformation blade root structure of the low-wind-speed wind turbine blade according to claim 1, characterized in that: The connecting rod is detachably connected to the fixed ring.

3. The anti-deformation blade root structure of the low-wind-speed wind turbine blade according to claim 2, characterized in that: Threaded holes are opened on the fixed ring, and threads are provided at both ends of the connecting rod.

4. The anti-deformation blade root structure of the low-wind-speed wind turbine blade according to claim 1, characterized in that: The mutually adjacent sides of the adjacent connecting rods can respectively abut against both sides of the blade root.

5. The anti-deformation blade root structure of the low-wind-speed wind turbine blade according to claim 4, characterized in that: The fixed ring and the connecting rod form a rectangular frame structure on the outer side of the blade root and can abut against the outer side of the blade root.

6. The anti-deformation blade root structure of the low-wind-speed wind turbine blade according to claim 1, characterized in that: The jacks are radially opened on the fixed ring and are symmetrically arranged so that the plug rod can penetrate the fixed ring. Threads are provided at both ends of the plug rod, and fastening bolts are connected.

7. The anti-deformation blade root structure of the low-wind-speed wind turbine blade according to claim 6, characterized in that: Two plug rods are inserted into each of the fixed rings. The diameters of the two plug rods are different. A hole is opened in the middle of one of the plug rods, and the other plug rod can pass through the hole. The two plug rods are arranged in a cross shape.

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