Wind power blade fastening device

Abstract

The utility model provides a wind power blade fastening device, which relates to the field of wind power generation equipment, and comprises a plurality of blade main bodies arranged on a hub, the roots of the blade main bodies are connected with a fastening base, the hub is provided with a plurality of assembling grooves, positioning columns are fixed in the assembling grooves, a through hole is formed in the fastening base, and the positioning columns are fixed in the through hole. The fastening base is arranged outside the positioning column in a sleeving mode from top to bottom through the through hole, and the fastening base is inserted into the assembling groove. According to the invention, the fastening base is matched with the assembling groove and the positioning column, and the fastening structure is convenient to operate, so that the mounting process is obviously simplified. In the large-scale wind power plant construction, the project progress can be effectively accelerated, stress distribution is more uniform through the synergistic effect of multiple stable structures, the loosening risk caused by local stress concentration is reduced, it is ensured that the blades are stably connected all the time under the complex working condition, and continuous and efficient operation of a wind power generation system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind power generation equipment, especially to a wind power blade fastening device. BACKGROUND

[0002] As a clean and renewable energy source, wind energy is increasingly important in the global energy structure. Wind power blades are the key components of wind turbines for capturing wind energy, and their performance and reliability directly affect the power generation efficiency and stability of the entire wind power system. With the continuous development of wind power technology, the size of wind power blades gradually increases to improve the single machine power generation power. However, for small and medium-sized wind power blades, there are many problems in the fastening mode that need to be solved.

[0003] In the prior art, small and medium-sized wind power blades are mainly fastened and installed by screw nuts in cooperation with a wrench. This traditional fastening method has exposed a series of shortcomings in actual application. First of all, the installation process is extremely complex. Because of the large number of screws and nuts, the installer needs to use a wrench to tighten one by one, which consumes a lot of time and labor cost. Especially in the construction and maintenance of large-scale wind farms, the installation work of numerous blades will be delayed due to this complex fastening method, which seriously affects the project progress.

[0004] Secondly, the stability of this fastening method is poor. Screws and nuts are prone to loosen under the action of long-term wind vibration and complex natural environment. Once the screws and nuts are loose, gaps and displacements will occur at the connection parts of the wind power blades, which not only leads to the decline of the aerodynamic performance of the blades and reduces the efficiency of wind energy capture, but also causes additional vibration and noise during the operation of the blades. More seriously, loose screws and nuts may fall off, causing damage to other parts of the wind turbine, and even causing safety accidents, endangering the safety of surrounding personnel and equipment. Therefore, a wind power blade fastening device is proposed. SUMMARY

[0005] The utility model in response to the deficiencies in the prior art, through the cooperation mode of fastening base and assembly groove, positioning column, and the convenient operation of fastening structure, the installation process is significantly simplified. In large-scale wind farm construction, it can effectively speed up the project progress, through the synergistic effect of various stable structures, the stress distribution is more uniform, the risk of loosening caused by local stress concentration is reduced, the stability of the blade is ensured under complex working conditions, and the continuous and efficient operation of the wind power system is ensured.

[0006] In order to solve the above technical problems, the utility model solves the problems of complicated installation and poor stability after installation of wind power blades by the following technical scheme.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme:

[0008] A wind power blade fastening device, including a plurality of blade main bodies arranged on a hub, the root of the blade main body is connected with a fastening base, a plurality of assembly grooves are arranged on the hub, a positioning column is fixed in the assembly groove, a through hole is arranged in the fastening base, the fastening base is sleeved on the outside of the positioning column from top to bottom through the through hole, and the fastening base is inserted into the assembly groove, and the outside of the positioning column is rotatably connected with a fastening structure through a thread to realize the locking function.

[0009] Preferably, a thread is arranged on the inner and outer cylinder walls of the fastening structure, a thread is arranged on the outside of the positioning column and is rotatably connected with the inner thread of the fastening structure, and a thread is also arranged in the through hole and is rotatably connected with the outer thread of the fastening structure.

[0010] Preferably, an annular limiting ring is connected at the cylinder mouth of the fastening structure, and the annular limiting ring is attached to the outer periphery of the through hole to limit.

[0011] Preferably, an extension cylinder mouth is connected at the top of the annular limiting ring, and the extension cylinder mouth is used for rotating the fastening structure.

[0012] Preferably, a wind cap is further arranged on the hub, the wind cap is used for covering the fastening base, a plurality of positioning convex rods are uniformly connected on the wind cap, the positioning convex rods correspondingly penetrate the extension cylinder mouth and are inserted into the upper part of the fastening structure.

[0013] Preferably, anti-skid lines are arranged on the inner and outer cylinder walls of the extension cylinder mouth, and the inner thread of the fastening structure is extruded with the outer wall of the positioning convex rod to realize fastening.

[0014] Preferably, a connecting ring is connected around the bottom of the wind cap, the connecting ring is designed of rubber material and keeps contact with the fastening base.

[0015] Preferably, a slot is symmetrically arranged on both sides of the assembly groove, a clamping insert is symmetrically connected on both sides of the fastening base, the clamping insert is correspondingly inserted into the inside of the slot from top to bottom, and a stable convex layer is arranged between the clamping insert and the slot to enhance stability.

[0016] Preferably, a clamping groove is arranged at the bottom of the clamping insert, a clamping rod is glued on the top of the stable convex layer, and the clamping rod is correspondingly inserted into the inside of the clamping groove.

[0017] Preferably, the inner wall of the assembly groove is designed to have an arc shape, and the inner end face of the fastening base is also designed to have an arc matching the inner wall of the assembly groove to ensure the stability of the contact surface.

[0018] Compared with the prior art, the wind power blade fastening device has the following beneficial effects:

[0019] The wind power blade fastening device provided by the application significantly simplifies the installation process through the cooperation mode of the fastening base, the assembly groove and the positioning column and the convenient operation of the fastening structure.

[0020] The multiple stable structures cooperate with each other, the stable convex layer between the clamping insert and the insertion slot effectively buffers external force and increases the tightness of the connection by using the elasticity and friction of the rubber material.

[0021] The insertion structure of the clamping rod and the clamping slot enables the stable convex layer to be conveniently replaced after being worn or damaged without the need for complex disassembly and maintenance operations on the entire fastening base or other large components.

[0022] The connection ring at the bottom of the air cap is made of rubber material and is in close contact with the fastening base after installation, thereby playing a good sealing role and effectively preventing dust, rainwater, sand and other impurities from entering the connection part. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 It is the integral split structure schematic view of the utility model;

[0026] Figure 3 It is the split local structure schematic view of the utility model blade body, fastening pedestal, fastening structure and stable convex layer;

[0027] Figure 4 It is the split local structure schematic view of the utility model blade body, fastening pedestal, fastening structure and stable convex layer;

[0028] Figure 5 It is the bottom structure schematic view in the utility model Figure 4 ;

[0029] Figure 6 It is the bottom local structure schematic view of the utility model hood;

[0030] Figure 7 It is the front view partial structure schematic view of the utility model.

[0031] Figure number explanation: 1, hub;101, assembly groove;102, positioning column;103, insertion slot;2, blade body;201, fastening pedestal;2011, card insert;2012, stable convex layer;2013, card rod;2014, card slot;202, through hole;3, hood;301, positioning convex rod;302, connecting ring;4, fastening structure;401, extension cylinder mouth;402, annular limiting ring. DETAILED DESCRIPTION

[0032] The utility model will be described in further detail below in conjunction with the drawings.

[0033] The following description is used to disclose the utility model so that the person skilled in the art can realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by the person skilled in the art. The basic principles of the utility model defined in the following description can be used in other embodiments, modification schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0034] The person skilled in the art should understand that in the disclosure of the utility model, the orientation or position indicated by the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of the simplified description of the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above-mentioned terms cannot be understood as a limitation of the utility model.

[0035] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number. Embodiments

[0036] Please refer to Figures 1-7 A wind power blade fastening device, comprising a plurality of blade bodies 2 arranged on a hub 1, a fastening base 201 connected to the root of the blade body 2, a plurality of assembly grooves 101 provided on the hub 1, a positioning column 102 fixed inside the assembly groove 101, a through hole 202 provided in the fastening base 201, the fastening base 201 being sleeved outside the positioning column 102 from top to bottom through the through hole 202, and the fastening base 201 being inserted into the assembly groove 101, and a fastening structure 4 being rotatably connected outside the positioning column 102 through threads to realize a locking function.

[0037] The wind power blade fastening device of the present application is mainly composed of a hub 1, a blade body 2, a fastening base 201, a through hole 202 and a fastening structure 4, and the following is a detailed structure and working principle.

[0038] Blade body 2 installation steps:

[0039] The fastening base 201 at the root of the blade body 2 is carefully aligned with the assembly groove 101 on the hub 1. During the insertion process, it is necessary to ensure that the central axis of the fastening base 201 is consistent with the central axis of the assembly groove 101, so as to avoid dislocation of the clamping insert 2011 and the insertion groove 103. As the fastening base 201 is gradually inserted into the assembly groove 101 from the top opening, the clamping inserts 2011 on both sides will slowly insert along the insertion grooves 103 on both sides of the assembly groove 101. When inserting, the stable convex layer 2012 between the clamping insert 2011 and the insertion groove 103 begins to contact the inner wall of the insertion groove 103. Since the stable convex layer 2012 is made of neoprene rubber material, it has a certain elasticity and friction, and when it is extruded, it will gradually fill the small gap between the clamping insert 2011 and the insertion groove 103, thereby effectively increasing the friction between the two and improving the stability of the connection. At the same time, this elastic extrusion can also buffer a part of the vibration and impact force generated by the wind, reducing the damage to the connection part. The cooperation of the clamping rod 2013 and the clamping groove 2014 further enhances the fixing effect of the stable convex layer 2012, preventing it from shifting or falling off during long-term use. When the clamping insert 2011 is completely inserted into the insertion groove 103, the stable convex layer 2012 is in a compressed state, continuously providing stable support force and friction.

[0040] When the fastening base 201 is inserted into the assembly groove 101, the through hole 202 in the interior thereof is sleeved on the positioning column 102 welded at the bottom of the inner wall of the assembly groove 101, and preliminary positioning is completed. At this time, there is a certain gap between the through hole 202 and the positioning column 102, which provides space for the installation of the subsequent fastening structure 4.

[0041] The extended barrel mouth 401 at the barrel mouth of the handheld fastening structure 4 is inserted into the gap between the positioning column 102 and the through hole 202. Since the inner and outer barrel walls of the fastening structure 4 are threaded, there is a threaded section outside the positioning column 102 corresponding to the inner thread of the fastening structure 4, and there is also a threaded section inside the through hole 202 corresponding to the outer thread of the fastening structure 4. After insertion, the fastening structure 4 is rotated so that the inner and outer threads thereof are engaged with the inner wall of the positioning column 102 and the through hole 202, respectively. During rotation, according to the direction and pitch of the thread, the fastening structure 4 gradually moves downward and is locked, firmly fixing the fastening base 201 in the assembly groove 101. When the rotation reaches the maximum value, the locking operation is completed, and at this time, the annular limiting ring 402 connected to the barrel mouth of the fastening structure 4 is in close contact with the top of the hub 1, that is, the outer periphery of the opening of the through hole 202. The annular limiting ring 402 is made of the same stainless steel material as the main body of the fastening structure 4, and the close contact thereof can prevent the fastening structure 4 from loosening or shifting when subjected to external force, further improving the stability of the connection.

[0042] Installation steps of the wind cap 3:

[0043] After the blade main body 2 is installed and fastened, the wind cap 3 is installed on the blade main body 2. The wind cap 3 is aligned in position, and the positioning protruding rod 301 in the interior thereof penetrates the extended barrel mouth 401 correspondingly. Since the inner and outer barrel walls of the extended barrel mouth 401 are provided with anti-skid lines, the hands of the operator are not easy to slip when the positioning protruding rod 301 is inserted, facilitating operation. The positioning protruding rod 301 continues to be inserted and connected to the upper part inside the fastening structure 4, and at this time, the inner thread of the fastening structure 4 is extruded with the outer wall of the positioning protruding rod 301, thereby realizing the fastening of the wind cap 3. The connecting ring 302 around the bottom of the wind cap 3 is designed of rubber material, and when the wind cap 3 is butt-jointed to the hub 1, the connecting ring 302 remains in contact with the fastening base 201, which not only plays a sealing role to prevent impurities such as dust and rainwater from entering the connection part, but also buffers vibration to a certain extent, improving the stability and durability of the overall structure.

[0044] II. Working principle

[0045] Preliminary positioning principle

[0046] The hub 1 is provided with assembly grooves 101 in the same number as the blade bodies 2, the assembly grooves 101 enable the fastening bases 201 fixedly connected to the roots of the blade bodies 2 to be inserted into the assembly grooves 101 from the upper opening, and the positioning columns 102 fixedly arranged in the assembly grooves 101 cooperate with the through holes 202 arranged in the middle of the fastening bases 201, so that the blade bodies 2 are preliminarily positioned during installation. This design can quickly determine the approximate position of the blade bodies 2 on the hub 1, and provide a basis for subsequent fastening operations, and through the cooperation of the positioning columns 102 and the through holes 202, the translation and rotation of the blade bodies 2 within a certain range can be limited, and the installation accuracy is improved. The shape and size of the assembly grooves 101 are closely matched with the fastening bases 201, the curvature of the inner wall of the assembly grooves 101 is matched with the curvature of the inner end face of the fastening bases 201, when the fastening bases 201 are inserted, the assembly grooves 101 and the fastening bases 201 can realize large-area close contact, increase the friction and the stability of the connection, so that the blade bodies 2 have a certain anti-external interference ability after preliminary positioning.

[0047] Fastening principle

[0048] The fastening structure 4 plays a key locking and fixing role in the utility model. The threads on the inner and outer cylinder walls are matched with the threads outside the positioning column 102 and the threads inside the through hole 202. When the fastening structure 4 is rotated, according to the transmission principle of the threads, the fastening structure 4 moves up and down along the positioning column 102 and simultaneously produces close thread connection with the inner wall of the through hole 202. With the rotation, the fastening structure 4 gradually presses the fastening base 201 in the assembly groove 101, and realizes firm fixing of the blade body 2. During the fastening process, the friction and the engagement force between the threads can withstand the great tension, pressure and shear force generated during the operation of the blade. The arrangement of the annular limiting ring 402 further enhances the fastening effect, the close contact of the annular limiting ring 402 with the outer periphery of the through hole 202 can prevent the fastening structure 4 from loosening or moving when subjected to external force, and ensure the stability of the connection. The contact surface between the annular limiting ring 402 and the outer periphery of the through hole 202 has a certain roughness, which further increases the friction and improves the anti-loosening performance.

[0049] Stability enhancement principle

[0050] The clamping inserts 2011 on both sides of the fastening base 201 are matched with the insertion grooves 103 on both sides of the assembly groove 101, which can disperse the force after the installation of the blade body 2, so that the connection part is more stable. The stable convex layer 2012 between the clamping inserts 2011 and the insertion grooves 103 not only can increase the friction, but also can play a role in buffering and shock absorption, reducing the risk of loosening caused by wind vibration and other factors. The insertion structure of the clamping rod 2013 and the clamping groove 2014 facilitates the replacement of the stable convex layer 2012. After long-term use, if the stable convex layer 2012 is worn or damaged, it can be conveniently replaced without the need to replace the entire fastening base 201 or to perform complex maintenance operations. The matching radii provided on the inner wall of the assembly groove 101 and the inner end face of the fastening base 201 increase the contact area between the two, making the connection more compact, and when external forces are borne, the stress can be better dispersed, improving the stability of the overall structure. The installation of the wind cap 3 also contributes to the overall stability, and the cooperation of the positioning convex rod 301 of the wind cap 3 with the fastening structure 4 and the contact of the connecting ring 302 with the fastening base 201 further limit the displacement of the components from above and around, improving the stability of the entire wind power blade fastening device during operation, reducing the loosening, displacement and other problems caused by wind and other external forces, thereby ensuring the normal operation and power generation efficiency of the wind power generation system. Some sealing strips can also be provided between the wind cap 3 and the blade body 2 to further enhance the sealing performance, prevent rainwater, dust and other erosion of the connection part, and prolong the service life of the device.

[0051] It should be understood by those skilled in the art that the embodiments of the utility model shown in the above description and the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively achieved. The function and structural principle of the utility model have been demonstrated and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A wind turbine blade fastening device comprising a number of blade bodies (2) arranged on a hub (1), characterized in that: The root of the blade body (2) is connected with a fastening base (201), a plurality of assembly grooves (101) are formed on the hub (1), a positioning column (102) is fixed in the assembly groove (101), a through hole (202) is formed in the fastening base (201), the fastening base (201) is sleeved outside the positioning column (102) from top to bottom through the through hole (202), and the fastening base (201) is inserted into the assembly groove (101), and the positioning column (102) is rotatably connected with a fastening structure (4) outside through a thread to realize a locking function.

2. A wind turbine blade fastening device according to claim 1, characterised in that: A section of threads are arranged on the inner and outer cylinder walls of the fastening structure (4), a section of threads are arranged outside the positioning column (102) and are rotatably connected with the inner threads of the fastening structure (4), and a section of threads are also arranged in the through hole (202) and are rotatably connected with the outer threads of the fastening structure (4).

3. A wind turbine blade fastening device according to claim 1, characterised in that: An annular limiting ring (402) is connected to the cylinder opening of the fastening structure (4), and the annular limiting ring (402) is attached to the outer periphery of the through hole (202) to limit.

4. A wind turbine blade fastening device according to claim 3, characterised in that: An extension cylinder opening (401) is connected to the top of the annular limiting ring (402) to rotate the fastening structure (4).

5. A wind turbine blade fastening device according to claim 4, characterised in that: A wind cap (3) is further arranged on the hub (1), the wind cap (3) is arranged on the fastening base (201), a plurality of positioning convex rods (301) are uniformly connected to the wind cap (3), the positioning convex rods (301) correspondingly penetrate the extension cylinder opening (401) and are inserted into the upper part of the fastening structure (4).

6. A wind turbine blade fastening device according to claim 5, characterised in that: Anti-skid lines are arranged on the inner and outer cylinder walls of the extension cylinder opening (401), and the inner threads of the fastening structure (4) are extruded with the outer wall of the positioning convex rod (301) to realize fastening.

7. A wind turbine blade fastening device according to claim 5, characterised in that: A connecting ring (302) is connected around the bottom of the wind cap (3), the connecting ring (302) is made of rubber material and keeps in contact with the fastening base (201).

8. A wind turbine blade fastening device according to claim 1, characterised in that: Insert grooves (103) are symmetrically formed on both sides of the assembly groove (101), clamping inserts (2011) are symmetrically connected to both sides of the fastening base (201), the clamping inserts (2011) are correspondingly inserted into the insert grooves (103) from top to bottom, and stable convex layers (2012) are arranged between the clamping inserts (2011) and the insert grooves (103) to enhance stability.

9. A wind turbine blade fastening device according to claim 8, characterised in that: A clamping groove (2014) is formed in the bottom of the clamping insert (2011), a clamping rod (2013) is glued to the top of the stable convex layer (2012), and the clamping rod (2013) is correspondingly inserted into the clamping groove (2014).

10. A wind turbine blade fastening device according to claim 1, characterised in that: The inner wall of the assembly groove (101) is arranged to have a curvature, and the inner end face of the fastening base (201) is also arranged to have a curvature matched with the inner wall of the assembly groove (101) to ensure the stability of the contact surface.

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