Detachable limiting structure and wind power generation device

Abstract

The utility model discloses a detachable limiting structure and a wind power generation device. The detachable limiting structure comprises a supporting piece and a plurality of bearing bushes, the bearing bushes are provided with inserting ends and stopping ends, the inserting ends are suitable for being inserted into bolt sleeves, first abutting sections and second abutting sections are sequentially arranged on the bearing bushes in the direction from the inserting ends to the stopping ends, the bearing bushes and the supporting piece are in a matched state, and in the matched state, the first abutting sections and the second abutting sections are arranged in the circumferential direction of the supporting piece. The inner wall faces of the multiple bearing bushes are detachably arranged on the outer wall face of the supporting piece in a surrounding and covering mode, and in the matched state and the state that the bearing bushes and the supporting piece are inserted into the bolt sleeve and the flange hole, the outer wall face of the first abutting section abuts against the inner wall face of the bolt sleeve, and the outer wall face of the second abutting section abuts against the hole wall face of the flange hole. According to the technical scheme, in the processes of assembling, transporting, hoisting and the like of the wind power generation blade, the bearing bush abuts against the bolt sleeve and the flange hole, and the alignment precision of the blade root pitch circle and the blade root flange is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, and particularly relates to a detachable limiting structure and a wind power generation device. BACKGROUND

[0002] The wind power generation device is a device for converting wind energy into electric energy. The wind power generation device has wind power generation blades and a hub. The wind power generation blades generate a rotating torque under the action of wind, and drive the hub to rotate.

[0003] In the prior art, the wind power generation blades are fixed to the hub through the bolt connection of the blade root joint circle and the blade root flange. The blade root joint circle is provided with an annular array of bolt sleeves, and the blade root flange is provided with flange holes corresponding to the bolt sleeves. However, during the assembly, transportation and hoisting of the wind power generation blades, the blade root joint circle and the blade root flange are prone to relative displacement due to stress release or external force, resulting in misalignment of the bolt sleeves and the flange holes, and making it difficult for the bolts to be smoothly inserted, thereby affecting the installation of the wind power generation blades. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a detachable limiting structure and a wind power generation device. During the assembly, transportation and hoisting of the wind power generation blades, the abutment of the bushings with the bolt sleeves and the flange holes ensures the alignment accuracy of the blade root joint circle and the blade root flange.

[0005] In a first aspect, the utility model provides a detachable limiting structure, comprising:

[0006] a support member;

[0007] a plurality of bushings, the bushings having an insertion end and a stop end opposite to the insertion end, along the direction from the insertion end to the stop end, the bushings are provided with a first abutment section and a second abutment section in sequence, and along the circumferential direction of the support member, the inner wall surfaces of the plurality of bushings are detachably and circumferentially arranged on the outer wall surface of the support member.

[0008] Beneficial effects: This detachable limiting structure surrounds the outer wall surface of the support member with the inner wall surface of multiple bearing bushes, so that the bearing bushes and the support member are in a matching state, and the bearing bushes and the support member in the matching state are inserted into the bolt sleeve and the flange hole, so that the outer wall surface of the first abutting section of the bearing bush abuts against the inner wall surface of the bolt sleeve, and the outer wall surface of the second abutting section abuts against the hole wall surface of the flange hole. During the assembly, transportation, hoisting and other processes of the wind power blade, the abutment of the bearing bushes with the bolt sleeve and the flange hole respectively ensures the alignment accuracy of the blade root section circle and the blade root flange, effectively limits the relative displacement of the blade root section circle and the blade root flange, prevents the alignment deviation caused by stress release or external force, so as to facilitate the bolt to pass through the bolt sleeve and the flange hole, and ensures that the wind power blade can be normally installed. At the same time, it can avoid the bolt being sheared by the blade root flange due to the relative displacement of the blade root section circle and the blade root flange, protect the bolt, prevent the bolt from being invalid due to shearing, and improve the service life and reliability of the bolt.

[0009] In addition, when the blade root section circle and the blade root flange are assembled, the bearing bushes and the support member in the matching state are inserted between the bolt sleeve and the flange hole. Since the outer wall surface of the first abutting section of the bearing bush abuts against the inner wall surface of the bolt sleeve, and the outer wall surface of the second abutting section abuts against the hole wall surface of the flange hole, the bearing bushes and the support member can forcibly correct the relative deformation between the blade root section circle and the blade root flange, avoid the appearance of hidden steps between the bolt sleeve and the flange hole, ensure the installation accuracy, guarantee the accuracy of the connection between the wind power blade and the hub, and improve the installation quality of the wind power blade.

[0010] In addition, after the wind power blade is hoisted to the sky and connected with the hub through bolt pre-tightening, since the bearing bushes and the support member are detachably arranged, the support member can be pulled out of the bearing hole of the hub, and then the multiple bearing bushes can be taken out of the bearing hole. That is, after the installation of the wind power blade is completed, the bearing bushes and the support member can be taken out, which saves cost and can be reused, thereby reducing the installation cost of the wind power blade.

[0011] In summary, the detachable limiting structure can ensure the alignment accuracy of the blade root section circle and the blade root flange, so as to facilitate the installation of the wind power blade. At the same time, the structure is simple, convenient to use, and can be reused to reduce the installation cost of the wind power blade.

[0012] In an optional embodiment, a limiting portion is arranged on the outer wall surface of the support member, and the limiting portion abuts against the stop end of the bearing bush.

[0013] Beneficial effects: In the matching state, the stop end of the bearing bush abuts against the limiting portion, and the limiting portion can provide clear axial positioning for the bearing bush, so as to facilitate the insertion of the bearing bush and the support member into the flange hole and the bolt sleeve, and prevent the displacement of the bearing bush in the axial direction of the support member during the insertion of the bearing bush and the support member into the flange hole and the bolt sleeve.

[0014] In the process of assembly, transportation, hoisting and the like of the wind power generation blade, various external forces will act on the bearing bush, and axial movement of the bearing bush can occur. The abutting structure of the limiting portion and the stop end of the bearing bush can effectively limit the axial movement of the bearing bush, ensure that the bearing bush is always in an effective working position, continuously play a role of limiting the relative displacement of the blade root joint circle and the blade root flange, protect the blade root bolt from additional shear force, and improve the service life and reliability of the bolt.

[0015] In an optional embodiment, the limiting portion comprises a limiting ring and a plurality of limiting blocks. The limiting ring is coaxially arranged with the support member. The plurality of limiting blocks are annularly and spacedly arranged on the limiting ring along the circumferential direction of the limiting ring. A clamping gap is formed between any two adjacent limiting blocks.

[0016] The stop end of the bearing bush is adapted to be inserted into the clamping gap.

[0017] Beneficial effects: The plurality of limiting blocks are annularly and spacedly distributed along the circumferential direction of the limiting ring. The stop end of the bearing bush is inserted into the clamping gap formed by the adjacent limiting blocks, so that the bearing bush can be accurately positioned from multiple directions. When the bearing bush is installed on the support member, the stop end of the bearing bush can be directly inserted into the clamping gap, so that the operation is simple and fast, the installation difficulty is reduced, and the work efficiency is improved. When the bearing bush is removed from the support member, the bearing bush only needs to be taken out from the clamping gap, without the need for complex operation steps. Especially when the bearing bush needs to be taken out after the blade is installed, it can be easily achieved, which facilitates the reuse of the bearing bush and the support member, and reduces the installation cost of the wind power generation blade.

[0018] In an optional embodiment, the detachable limiting structure further comprises a plurality of flexible cables. The plurality of flexible cables are arranged in one-to-one correspondence with the plurality of bearing bushes. One end of each flexible cable is connected to a bearing bush, and the other end of the flexible cable is connected to the support member.

[0019] Beneficial effects: After the wind power generation blade is installed, the bearing bush needs to be taken out from the bolt sleeve and the flange hole for reuse. The flexible cable provides a convenient operation mode for the removal of the bearing bush. Since the installation position of the bearing bush is relatively concealed, it is difficult to directly take it out. The flexible cable connected between the bearing bush and the support member can be pulled to smoothly take out the bearing bush from the narrow space after the support member is pulled out, especially from the bearing hole of the pitch bearing or the like channel with a smaller diameter, which greatly improves the efficiency of the bearing bush removal and saves the labor and time cost.

[0020] In an optional embodiment, a connecting hole is arranged on the bearing bush at the stop end. The flexible cable is connected to the bearing bush through the connecting hole.

[0021] Beneficial effects: By setting the connecting hole on the bearing bush, a clear and stable connection position is provided for the flexible cable and the bearing bush. Compared with other connection methods, the flexible cable is connected through the connecting hole, which can make the connection point more concentrated and the stress more uniform. When the bearing bush is pulled out by the flexible cable, the connecting hole can effectively disperse the pulling force, avoid damage caused by excessive local stress of the bearing bush, ensure the firm and reliable connection between the bearing bush and the flexible cable, and enable the flexible cable to stably play the role of assisting the bearing bush in disassembly.

[0022] When the wind power blade is installed, the bearing bush needs to be removed, and the connecting hole is arranged at the stop end, so that the connection position of the flexible cable is closer to the extraction direction of the bearing bush. When the bearing bush is removed by pulling the flexible cable, the extraction resistance can be effectively reduced, and the bearing bush can be prevented from being stuck in the bolt sleeve and the flange hole. In the narrow pitch bearing hole space, connecting the flexible cable from the stop end can more conveniently control the extraction angle and direction of the bearing bush, smoothly remove the bearing bush from the complex structure, and improve the disassembly efficiency.

[0023] In an optional embodiment, the inner wall surface of the bearing bush is provided with a receiving groove at the stop end, and the flexible cable is connected with the connecting hole through the receiving groove.

[0024] Beneficial effects: By arranging the receiving groove on the inner wall surface of the bearing bush, the flexible cable is connected through the receiving groove, and the receiving groove provides a relatively safe space for the flexible cable, avoiding direct friction between the flexible cable and the support during use or extrusion of the flexible cable between the support and the bearing bush. If the flexible cable is directly exposed, the flexible cable is easy to rub against the support, causing wear and even breakage of the flexible cable. The receiving groove can wrap the flexible cable, reduce damage to the flexible cable from external factors, prolong the service life of the flexible cable, ensure reliable performance of the flexible cable in multiple uses, and reduce the frequency and cost of replacing the flexible cable.

[0025] In an optional embodiment, the outer wall surface of the bearing bush is provided with a stepped groove at the stop end, and the stepped groove is adapted to accommodate the flexible cable.

[0026] Beneficial effects: In the limited space of the wind power blade, the design of the stepped groove enables the flexible cable to be embedded in the outer wall of the bearing bush, avoiding disordered distribution of the flexible cable around the bearing bush and effectively saving space. When the bearing bush is matched with the bolt sleeve and the flange hole, part of the flexible cable is accommodated in the stepped groove, which does not interfere with the installation and normal work of other components, so that the outer wall surface of the second abutting section can normally abut against the hole wall surface of the flange hole.

[0027] In addition, the flexible cable is arranged in the stepped groove, so that the flexible cable is physically protected, and the flexible cable is prevented from being directly rubbed against the hole wall surface of the flange hole or squeezed between the bearing bush and the flange hole in the use process, the wear and breakage risk of the flexible cable caused by friction is reduced, the service life of the flexible cable is prolonged, the flexible cable can normally play a role when the bearing bush needs to be taken out through the flexible cable, and the bearing bush dismounting work is ensured to be smoothly performed.

[0028] In an optional embodiment, the insertion end of the bearing bush is provided with a first chamfer;

[0029] The thickness of the bearing bush at the first chamfer gradually increases in the direction from the insertion end to the stop end.

[0030] Beneficial effects: by arranging the first chamfer at the insertion end of the bearing bush, the inclined surface of the chamfer can guide the bearing bush to smoothly enter when the bearing bush is inserted into the bolt sleeve, and the insertion difficulty is reduced. The thickness of the insertion end of the bearing bush gradually increases, so that the contact between the bearing bush and the bolt sleeve is a gradual process, and the jamming or collision caused by the sudden complete insertion of the bearing bush is avoided. By arranging the first chamfer, the installation efficiency can be effectively improved, and the installation time and labor cost are reduced.

[0031] In an optional embodiment, a second chamfer is arranged at the connection between the first abutting section and the second abutting section;

[0032] The thickness of the bearing bush at the second chamfer gradually increases in the direction from the insertion end to the stop end.

[0033] Beneficial effects: if the connection between the first abutting section and the second abutting section is not provided with the second chamfer, the connection will be sharp. When the bearing bush is inserted between the bolt sleeve and the flange hole, the sharp part is easy to directly impact the edge of the bolt sleeve, and a large local stress is generated, which may cause deformation, cracks and other damages of the edge of the bolt sleeve, and affect the structural strength and precision of the bolt sleeve. The existence of the second chamfer changes the contact between the bearing bush and the edge of the bolt sleeve into a smooth transition when the bearing bush is inserted, and direct impact of the sharp part is avoided, so that the bolt sleeve is effectively protected.

[0034] In an optional embodiment, a connecting part is arranged on the support, and the flexible cable is connected with the support through the connecting part.

[0035] Beneficial effects: By providing the connecting part on the support, the connecting part provides a clear position for the connection of the flexible cable and the support, reducing the installation difficulty. The staff can quickly and accurately connect the flexible cable and the support, improving the assembly efficiency. The specific shape and structure of the connecting part can position the flexible cable, ensure the installation position of the flexible cable on the support is accurate, avoid the flexible cable winding or misplacement during installation, ensure that the force transmission is smoother when the bearing bush is taken out through the flexible cable, and the bearing bush can be smoothly pulled out. At the same time, the connecting part enhances the connection strength of the flexible cable and the support.

[0036] In a second aspect, the utility model also provides a wind power generation device, including:

[0037] The wind power generation blade has a root circle and a root flange, a plurality of bolt sleeves are arranged in the root circle in a ring array, and a plurality of flange holes are arranged on the root flange corresponding to the bolt sleeves.

[0038] The support and the bearing bush are detachably arranged in the bolt sleeve and the flange hole.

[0039] Beneficial effects: This wind power generation device, in the process of wind power generation blade assembly, transportation, hoisting and the like, through the abutment of the bearing bush with the bolt sleeve and the flange hole respectively, ensures the alignment accuracy of the root circle and the root flange, effectively limits the relative displacement of the root circle and the root flange, prevents the alignment deviation caused by stress release or external force, so as to facilitate the bolt to pass through the bolt sleeve and the flange hole, and ensures that the wind power generation blade can be normally installed.

[0040] In an optional embodiment, the wind power generation device further comprises a hub, the hub is provided with a variable pitch bearing, and a plurality of bearing holes are arranged on the variable pitch bearing corresponding to the flange holes.

[0041] In the state that the wind power generation blade is connected with the hub, the end of the support away from the bearing bush is inserted into the bearing hole.

[0042] Beneficial effects: When the wind power generation blade is hoisted to the sky and connected with the hub, the end of the support away from the bearing bush can be inserted into the bearing hole, so that the positions of the flange hole and the bearing hole correspond, ensuring that the positions of the wind power generation blade and the hub correspond, so as to facilitate the subsequent use of the bolt to connect the wind power generation blade and the hub. After the bolt is pre-tightened, since the bearing bush and the support are detachably arranged, the support can be pulled out of the bearing hole of the hub first, and then the plurality of bearing bushes can be taken out of the bearing hole. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0044] Figure 1 is a structure diagram of the bearing in the detachable limiting structure provided in an embodiment of the present application;

[0045] Figure 2 is a structure diagram of the support in the detachable limiting structure provided in an embodiment of the present application;

[0046] Figure 3 is a structure diagram of the detachable limiting structure in a fitting state provided in an embodiment of the present application;

[0047] Figure 4 is another view of the structure diagram of the detachable limiting structure in a fitting state provided in an embodiment of the present application;

[0048] Figure 5 is a partial sectional view of the detachable limiting structure provided in an embodiment of the present application installed in a wind power generation device.

[0049] Explanation of reference signs:

[0050] 100, root joint circle; 110, bolt sleeve;

[0051] 200, root flange; 210, flange hole;

[0052] 300, support; 310, limiting part; 311, limiting ring; 312, limiting block; 313, clamping gap; 320, connecting part;

[0053] 400, bearing; 410, insertion end; 420, stop end; 430, first abutting section; 440, second abutting section; 450, connecting hole; 460, accommodating groove; 470, stepped groove; 480, first chamfer; 490, second chamfer;

[0054] 500, flexible cable;

[0055] 600, hub; 610, variable pitch bearing; 620, bearing hole. DETAILED DESCRIPTION

[0056] In the related art, the wind power generation blade is fixed to the hub by bolt connection of the root joint circle and the root flange. The root joint circle is provided with an annular array of bolt sleeves, and the root flange is provided with flange holes corresponding to the bolt sleeves. However, during the assembly, transportation and hoisting of the wind power generation blade, the root joint circle and the root flange are prone to relative displacement due to stress release or external force, resulting in deviation of the bolt sleeves and the flange holes, and the bolts are difficult to pass through smoothly, affecting the installation of the wind power generation blade.

[0057] Therefore, the present inventors have attempted to use a positioning pin, insert the positioning pin into the bolt sleeve and the flange hole, and limit the bolt sleeve and the flange hole by the positioning pin to prevent deviation of the bolt sleeve and the flange hole during transportation, hoisting and the like of the wind power generation blade. However, when the wind power generation blade is connected with the hub, the diameter of the bearing hole on the hub is relatively small (the diameter of the bearing hole is usually smaller than that of the flange hole), and if the wind power generation blade is directly connected with the hub, the positioning pin in the wind power generation blade cannot be pulled out of the bearing hole, affecting the installation of the bolt.

[0058] Based on this, the present inventors have redesigned a detachable limiting structure, which, during the assembly, transportation, hoisting and the like of the wind power generation blade, ensures the alignment accuracy of the root joint circle and the root flange by abutting of the bearing bush with the bolt sleeve and the flange hole respectively, effectively limits the relative displacement of the root joint circle and the root flange, prevents deviation due to stress release or external force, so as to facilitate the bolt to pass through the bolt sleeve and the flange hole, and ensures that the wind power generation blade can be normally installed. At the same time, after the wind power generation blade is hoisted to the hub and connected by bolt pre-tightening, since the bearing bush and the supporting piece are detachably arranged, the supporting piece can be pulled out of the bearing hole of the hub first, and then the plurality of bearing bushes are taken out of the bearing hole.

[0059] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0060] In order to solve the above technical problems, the embodiments of the present application will be described below in combination with Figures 1 to 5

[0061] According to the embodiments of the present application, on the one hand, as Figures 1 to 5 ​As shown in the drawings, a detachable limiting structure is provided, wherein the detachable limiting structure is used for a wind power generation blade, the wind power generation blade has a root joint circle 100 and a root flange 200, a plurality of bolt sleeves 110 are arranged in an annular array in the root joint circle 100, a plurality of flange holes 210 are arranged on the root flange 200, and the flange holes 210 are arranged in correspondence with the bolt sleeves 110. Specifically, the detachable limiting structure comprises a support 300 and a plurality of bearing bushes 400.

[0062] Specifically, as shown in the drawings, Figure 1 the bearing bush 400 has an insertion end 410 and a stop end 420, wherein the insertion end 410 and the stop end 420 are oppositely arranged, and the insertion end 410 is adapted to be inserted into the bolt sleeve 110. Along the direction from the insertion end 410 to the stop end 420, the bearing bush 400 is sequentially provided with a first abutting section 430 and a second abutting section 440.

[0063] Specifically, as shown in the drawings, Figure 1 , Figure 3 and Figure 4 the bearing bush 400 and the support 300 have a cooperating state. In the cooperating state, along the circumferential direction of the support 300, the inner wall surface of the plurality of bearing bushes 400 is circumferentially arranged on the outer wall surface of the support 300, and the bearing bush 400 is detachably arranged on the outer wall surface of the support 300.

[0064] Specifically, as shown in the drawings, Figure 5 in the cooperating state, and in the state that the bearing bush 400 and the support 300 are inserted into the bolt sleeve 110 and the flange hole 210, the outer wall surface of the first abutting section 430 abuts against the inner wall surface of the bolt sleeve 110, and the outer wall surface of the second abutting section 440 abuts against the hole wall surface of the flange hole 210.

[0065] The detachable limiting structure surrounds the outer wall surface of the support piece 300 with the inner wall surface of the multiple bearing bushings 400, so that the bearing bushings 400 and the support piece 300 are in a matching state, and the bearing bushings 400 and the support piece 300 in the matching state are inserted into the bolt sleeve 110 and the flange hole 210, so that the outer wall surface of the first abutting section 430 of the bearing bushing 400 abuts against the inner wall surface of the bolt sleeve 110, and the outer wall surface of the second abutting section 440 abuts against the hole wall surface of the flange hole 210. During the assembly, transportation, hoisting and other processes of the wind power blade, the abutment of the bearing bushings 400 and the bolt sleeve 110 and the flange hole 210 respectively ensures the alignment accuracy of the blade root joint circle 100 and the blade root flange 200, effectively limits the relative displacement of the blade root joint circle 100 and the blade root flange 200, and prevents the alignment deviation caused by stress release or external force, so as to facilitate the bolt to pass through the bolt sleeve 110 and the flange hole 210, and ensure that the wind power blade can be normally installed. At the same time, the bolt can be prevented from being sheared by the blade root flange 200 due to the relative displacement of the blade root joint circle 100 and the blade root flange 200, the bolt is protected, the bolt is prevented from being invalid due to shearing, and the service life and reliability of the bolt are improved.

[0066] In addition, when the blade root joint circle 100 and the blade root flange 200 are assembled, the bearing bushings 400 and the support piece 300 in the matching state are inserted between the bolt sleeve 110 and the flange hole 210, and the outer wall surface of the first abutting section 430 of the bearing bushing 400 abuts against the inner wall surface of the bolt sleeve 110, and the outer wall surface of the second abutting section 440 abuts against the hole wall surface of the flange hole 210, so that the bearing bushings 400 and the support piece 300 can forcibly correct the relative deformation between the blade root joint circle 100 and the blade root flange 200, avoid the occurrence of a dark step between the bolt sleeve 110 and the flange hole 210, ensure the installation accuracy, guarantee the accuracy of the connection between the wind power blade and the hub 600, and improve the installation quality of the wind power blade.

[0067] In addition, after the wind power blade is hoisted to the sky and connected to the hub 600 through bolt pre-tightening, the bearing bushings 400 and the support piece 300 can be detached, the support piece 300 can be pulled out of the bearing hole 620 of the hub 600, and then the multiple bearing bushings 400 can be taken out of the bearing hole 620. That is, after the installation of the wind power blade is completed, the bearing bushings 400 and the support piece 300 can be taken out, thereby saving cost and being reusable, and reducing the installation cost of the wind power blade.

[0068] In summary, the detachable limiting structure can ensure the alignment accuracy of the blade root joint circle 100 and the blade root flange 200, facilitate the installation of the wind power blade, and has the advantages of simple structure, convenient use, reusability and reduced installation cost of the wind power blade.

[0069] Specifically, the support 300 can be a cylindrical support rod or a triangular prism support rod, and the like. In the embodiments of the present application, the shape and structure of the support 300 are not specifically limited.

[0070] Specifically, the plurality of bearing bushes 400 can be two bearing bushes 400, three bearing bushes 400, or four bearing bushes 400, and the like. In the embodiments of the present application, the number of bearing bushes 400 is not specifically limited.

[0071] For example, when the bearing bushes 400 are three, the three bearing bushes 400 are evenly distributed along the circumference of the support 300, and are separated from each other by 120°. The layout of the three bearing bushes 400 can simplify the installation process while ensuring the relative displacement of the blade root joint circle 100 and the blade root flange 200.

[0072] Specifically, the lengths of the first abutting section 430 and the second abutting section 440, and the diameters of the first abutting section 430 and the second abutting section 440 in the fitted state can be adaptively set according to the hole diameters of the bolt sleeve 110 and the flange hole 210. In the embodiments of the present application, the sizes of the first abutting section 430 and the second abutting section 440 are not specifically limited.

[0073] For example, in the fitted state, the diameter of the first abutting section 430 is adapted to the hole diameter of the bolt sleeve 110, so that the outer wall surface of the first abutting section 430 can abut against the inner wall surface of the bolt sleeve 110. Similarly, the diameter of the second abutting section 440 is adapted to the hole diameter of the flange hole 210, so that the outer wall surface of the second abutting section 440 can abut against the inner wall surface of the flange hole 210.

[0074] Specifically, when the bearing bushes 400 and the support 300 are taken out of the bolt sleeve 110 and the flange hole 210, the support 300 can be directly pulled out of the flange hole 210, and then the plurality of bearing bushes 400 can be taken out of the flange hole 210 one by one. For example, the bearing bushes 400 can be clamped by a clamp such as a tweezers, and then taken out of the flange hole 210. The bearing bushes 400 can also be adsorbed by an adsorption device, and then taken out of the flange hole 210.

[0075] It should be noted that the support 300 and the bearing bushes 400 can also be applied to other components. For example, the bearing bushes 400 in the fitted state and the support 300 are inserted into a first component (not shown in the figure) and a second component (not shown in the figure), so that the outer wall surface of the first abutting section 430 of the bearing bushes 400 abuts against the hole wall surface of the first mounting hole of the first component, and the outer wall surface of the second abutting section 440 abuts against the hole wall surface of the second mounting hole of the second component. Through the abutment of the bearing bushes 400 with the first mounting hole and the second mounting hole, respectively, the alignment accuracy of the first component and the second component is ensured, and the relative displacement of the first component and the second component is effectively limited.

[0076] In one embodiment, in combination Figures 2 to 4 As shown, the outer wall surface of the support 300 is provided with a limiting portion 310, wherein, in the matching state of the bearing bush 400 and the support 300, the stop end 420 of the bearing bush 400 abuts against the limiting portion 310.

[0077] In the matching state, the stop end 420 of the bearing bush 400 abuts against the limiting portion 310, and the limiting portion 310 can provide clear axial positioning for the bearing bush 400, so as to facilitate the insertion of the bearing bush 400 and the support 300 into the flange hole 210 and the bolt sleeve 110, and prevent the bearing bush 400 from being displaced in the axial direction of the support 300 during the insertion of the bearing bush 400 and the support 300 into the flange hole 210 and the bolt sleeve 110.

[0078] During the assembly, transportation, hoisting and other processes of the wind power blade, various external forces will act on it, and the bearing bush 400 may be axially displaced. The abutting structure of the limiting portion 310 and the stop end 420 of the bearing bush 400 can effectively limit the axial movement of the bearing bush 400, ensure that the bearing bush 400 is always in an effective working position, continuously play a role in limiting the relative displacement of the blade root joint circle 100 and the blade root flange 200, and protect the bolts from additional shear force, thereby improving the service life and reliability of the bolts.

[0079] Specifically, the limiting portion 310 can be an annular protruding portion, a limiting pin, a limiting key, etc. In the embodiments of the present application, the structure of the limiting portion 310 is not specifically limited.

[0080] For example, the limiting portion 310 is an annular protruding portion. A ring of annular protruding portions is arranged on the outer wall of the support 300 as the limiting portion 310, which is simple in structure and easy to manufacture. The annular protruding portion surrounds the support 300 once and contacts the stop end 420 of the bearing bush 400, which can provide uniform support force and stable limiting effect. When the bearing bush 400 is installed, the stop end 420 directly abuts against the annular protruding portion, which ensures the axial position of the bearing bush 400 and effectively prevents the bearing bush 400 from sliding in the axial direction of the support 300, and can withstand external forces from different directions to some extent, thereby enhancing the stability of the entire structure.

[0081] In one embodiment, in combination Figures 2 to 4 As shown, the limiting portion 310 includes a limiting ring 311 and limiting blocks 312, the limiting blocks 312 are provided in plurality, and the limiting ring 311 is coaxially arranged with the support 300. Along the circumferential direction of the limiting ring 311, the plurality of limiting blocks 312 are annularly and spacedly arranged on the limiting ring 311, wherein a clamping gap 313 is formed between any two adjacent limiting blocks 312. In the matching state, the stop end 420 of the bearing bush 400 is inserted into the clamping gap 313.

[0082] The plurality of limiting blocks 312 are distributed in a circumferential annular interval along the limiting ring 311, the stop end 420 of the bearing bush 400 is inserted into the clamping gap 313 formed by the adjacent limiting blocks 312, and the bearing bush 400 can be accurately positioned from multiple directions. When the bearing bush 400 is installed on the support 300, the stop end 420 of the bearing bush 400 can be directly aligned with the clamping gap 313 for insertion, which is simple and fast to operate, reduces the installation difficulty, and improves the work efficiency. When the bearing bush 400 is removed from the support 300, it only needs to be taken out from the clamping gap 313, without the need for complex operation steps. Especially when the bearing bush 400 needs to be taken out after the wind power blade is installed, it can be easily realized, which is convenient for the reuse of the bearing bush 400 and the support 300, and reduces the installation cost of the wind power blade.

[0083] Specifically, the plurality of limiting blocks 312 can be uniformly distributed on the limiting ring 311, or can be non-uniformly distributed on the limiting ring 311. In the embodiment of the present application, the distribution mode of the limiting block 312 is not specifically limited.

[0084] For example, the plurality of limiting blocks 312 are non-uniformly distributed on the limiting ring 311, so that the plurality of limiting blocks 312 are arranged at intervals to form different clamping gaps 313, which can adapt to bearing bushes 400 of different sizes and shapes.

[0085] Specifically, the limiting block 312 can be provided as a rectangular protrusion, a trapezoidal protrusion, an arc-shaped protrusion, etc. In the embodiment of the present application, the shape of the limiting block 312 is not specifically limited.

[0086] In one embodiment, as shown in Figure 3 and Figure 4 The detachable limiting structure further includes a plurality of flexible ropes 500, and the plurality of flexible ropes 500 are arranged one-to-one corresponding to the plurality of bearing bushes 400. One end of the flexible rope 500 is connected with the bearing bush 400, and the other end is connected with the support 300.

[0087] After the wind power blade is installed, the bearing bush 400 needs to be taken out from the bolt sleeve 110 and the flange hole 210 for reuse. The flexible rope 500 provides a convenient operation mode for the disassembly of the bearing bush 400. Since the installation position of the bearing bush 400 is relatively hidden, it is difficult to take out directly, and the flexible rope 500 connected between the bearing bush 400 and the support 300 can be pulled out smoothly from the narrow space, especially from the bearing hole 620 of the variable pitch bearing 610, which greatly improves the disassembly efficiency of the bearing bush 400 and saves the labor and time cost.

[0088] Specifically, the flexible cable 500 can be a fiber rope, a chain, a steel wire rope, etc. In the embodiments of the present application, the type of the flexible cable 500 is not specifically limited.

[0089] For example, the flexible cable 500 is a fiber rope, such as a polyester fiber rope or an aramid fiber rope. Such a rope is light in weight, easy to operate, and has good flexibility, which can adapt to the small displacement of the bearing shell 400 under different working conditions. The aramid fiber rope has extremely high strength, which is much higher than that of a steel wire rope of the same weight, and has excellent chemical corrosion resistance. In the outdoor environment of a wind power blade, the aramid fiber rope can effectively resist the erosion of ultraviolet light, moisture and chemicals, thereby prolonging the service life of the flexible cable 500. The polyester fiber rope has relatively low cost and high cost performance, and is an economical and practical choice when the strength requirement is not particularly high.

[0090] Specifically, the flexible cable 500 can be connected to the insertion end 410 of the bearing shell 400, or connected to the stop end 420 of the bearing shell 400, or connected to the middle region of the bearing shell 400. In the embodiments of the present application, the connection position of the flexible cable 500 and the bearing shell 400 is not specifically limited.

[0091] Specifically, the bearing shell 400 can be provided with a connection buckle, a protruding portion or the like, and the flexible cable 500 is connected to the connection buckle or the protruding portion, so as to connect the bearing shell 400 and the flexible cable 500.

[0092] Similarly, the flexible cable 500 can be connected to the end of the support member 300, or connected to the middle region of the support member 300. In the embodiments of the present application, the connection position of the flexible cable 500 and the support member 300 is not specifically limited.

[0093] In one embodiment, in combination with the descriptions of Figure 1 , Figure 3 and Figure 4 , the bearing shell 400 is provided with a connection hole 450, the connection hole 450 is located at the stop end 420 of the bearing shell 400, and the flexible cable 500 is connected to the bearing shell 400 through the connection hole 450.

[0094] By providing the connection hole 450 on the bearing shell 400, a clear and stable connection position is provided for the flexible cable 500 and the bearing shell 400. Compared with other connection methods, the flexible cable 500 is connected by passing through the connection hole 450, which can make the connection point more concentrated and the stress more uniform. When the bearing shell 400 is pulled and disassembled by the flexible cable 500, the connection hole 450 can effectively disperse the pulling force, avoid local damage of the bearing shell 400 due to excessive stress, ensure the firm and reliable connection between the bearing shell 400 and the flexible cable 500, and enable the flexible cable 500 to stably play a role in assisting the disassembly of the bearing shell 400.

[0095] When the wind power blade is installed, the bearing bush 400 needs to be taken out, and the connecting hole 450 is arranged at the stop end 420, so that the connecting position of the flexible cable 500 is closer to the extraction direction of the bearing bush 400. When the bearing bush 400 is taken out by pulling the flexible cable 500, the pulling resistance can be effectively reduced, and the bearing bush 400 is prevented from being jammed in the bolt sleeve 110 and the flange hole 210. In a small space, the flexible cable 500 is connected to the stop end 420, so that the extraction angle and direction of the bearing bush 400 can be more conveniently controlled, the bearing bush 400 is smoothly taken out from the complex structure, and the disassembly efficiency is improved.

[0096] Specifically, the connecting hole 450 can be a square hole, a circular hole, a triangular hole or any structure, and in the embodiment of the application, the structure of the connecting hole 450 is not specifically limited.

[0097] In one embodiment, in combination with Figure 1 and Figure 3 As shown, the inner wall surface of the bearing bush 400 is provided with a containing groove 460, the containing groove 460 is arranged at the stop end 420, and the flexible cable 500 passes through the containing groove 460 and is connected to the connecting hole 450.

[0098] By arranging the containing groove 460 on the inner wall surface of the bearing bush 400, the flexible cable 500 is connected to the connecting hole 450 through the containing groove 460, and the containing groove 460 provides a relatively safe space for the flexible cable 500, so as to avoid that the flexible cable 500 directly rubs against the support 300 during use or is squeezed between the support 300 and the bearing bush 400. If the flexible cable 500 is directly exposed, the flexible cable 500 is easy to rub against the support 300, which causes the flexible cable 500 to wear or even break. The containing groove 460 can wrap the flexible cable 500 therein, reduces damage of external factors to the flexible cable 500, prolongs the service life of the flexible cable 500, ensures that the flexible cable 500 can reliably play a role in multiple uses, and reduces the frequency and cost of replacing the flexible cable 500.

[0099] Specifically, the containing groove 460 can be an open slot, so as to facilitate the flexible cable 500 to pass into the containing groove 460 and be connected to the connecting hole 450, and in the embodiment of the application, the type of the containing groove 460 is not specifically limited.

[0100] In one embodiment, in combination with Figure 1 , Figure 4 and Figure 5 As shown, the outer wall surface of the bearing bush 400 is provided with a stepped groove 470, wherein the stepped groove 470 is located at the stop end 420, and the stepped groove 470 is adapted to contain the flexible cable 500.

[0101] In the limited space of the wind power blade, the design of the stepped groove 470 enables the cable 500 to be embedded in the outer wall of the bearing bush 400, avoiding the cable 500 from being distributed around the bearing bush 400 in disorder, and effectively saving space. When the bearing bush 400 is matched with the bolt sleeve 110 and the flange hole 210, part of the cable 500 is accommodated in the stepped groove 470, which does not interfere with the installation and normal work of other components, so that the outer wall surface of the second abutting section 440 can normally abut against the hole wall surface of the flange hole 210.

[0102] In addition, placing the cable 500 in the stepped groove 470 can provide physical protection for the cable 500, avoid the cable 500 from directly rubbing against the hole wall surface of the flange hole 210 during use, or the cable 500 being squeezed between the bearing bush 400 and the flange hole 210, reduce the risk of cable 500 wear and tear or breakage caused by friction, prolong the service life of the cable 500, and ensure that the cable 500 can normally play a role when the bearing bush 400 needs to be removed through the cable 500, and ensure that the bearing bush 400 can be smoothly removed.

[0103] In one embodiment, in combination with Figure 1 and Figure 5 As shown, the insertion end 410 of the bearing bush 400 is provided with a first chamfer 480, and the thickness of the bearing bush 400 located at the first chamfer 480 gradually increases in the direction from the insertion end 410 to the stop end 420.

[0104] By providing the first chamfer 480 at the insertion end 410 of the bearing bush 400, the inclined surface of the first chamfer 480 can guide the bearing bush 400 to smoothly enter when the bearing bush 400 is inserted into the bolt sleeve 110, reducing the difficulty of insertion. The gradually increasing thickness of the insertion end 410 of the bearing bush 400 enables the contact between the bearing bush 400 and the bolt sleeve 110 to be a gradual process, avoiding the possibility of jamming or collision caused by the sudden complete insertion of the bearing bush 400. By providing the first chamfer 480, the installation efficiency can be effectively improved, and the installation time and labor cost can be reduced.

[0105] During the process of inserting the bearing bush 400 into the bolt sleeve 110, the first chamfer 480 with gradually changing thickness of the bearing bush 400 can disperse the contact stress between the bearing bush 400 and the bolt sleeve 110. If the insertion end 410 of the bearing bush 400 is a right angle, local stress concentration may be caused during insertion, which may damage the inner wall of the bearing bush 400 or the bolt sleeve 110. The design of the first chamfer 480 enables the contact area to gradually increase, and the pressure to be uniformly distributed, reducing the risk of damage to the bearing bush 400 and the bolt sleeve 110.

[0106] Specifically, the first chamfer 480 can be a 45° chamfer, a 30° chamfer, or an arc chamfer, etc. In the embodiments of the present application, the type of the first chamfer 480 is not specifically limited.

[0107] In one embodiment, as shown inFigure 1 As shown, the junction of the first abutting section 430 and the second abutting section 440 is provided with a second chamfer 490. In the direction from the insertion end 410 to the stop end 420, the thickness of the bearing bush 400 at the second chamfer 490 gradually increases.

[0108] During the installation of the bearing bush 400, if the junction of the first abutting section 430 and the second abutting section 440 is not provided with the second chamfer 490, the junction will be sharp. When the bearing bush 400 is inserted between the bolt sleeve 110 and the flange hole 210, the sharp part is prone to directly impact the edge of the bolt sleeve 110, generating a large local stress, which can cause deformation, cracks and other damages of the edge of the bolt sleeve 110, affecting the structural strength and precision of the bolt sleeve 110. The presence of the second chamfer 490 makes the contact between the bearing bush 400 and the edge of the bolt sleeve 110 smooth during insertion, avoiding the direct impact of the sharp part and effectively protecting the bolt sleeve 110.

[0109] Specifically, the second chamfer 490 can be a 45° chamfer, a 30° chamfer or an arc chamfer, etc. In the embodiments of the present application, the type of the second chamfer 490 is not specifically limited.

[0110] In one embodiment, as shown in the drawings, Figure 2 The support 300 is provided with a connecting part 320, and the flexible cable 500 is connected to the support 300 through the connecting part 320.

[0111] By providing the connecting part 320 on the support 300, the connecting part 320 provides a clear position for the connection of the flexible cable 500 and the support 300, reducing the installation difficulty. The staff can quickly and accurately connect the flexible cable 500 and the support 300, improving the assembly efficiency. The specific shape and structure of the connecting part 320 can position the flexible cable 500, ensuring the installation position of the flexible cable 500 on the support 300 to be accurate, avoiding the entanglement or misplacement of the flexible cable 500 during installation, ensuring that the force is transmitted more smoothly when the bearing bush 400 is taken out through the flexible cable 500, and the bearing bush 400 can be smoothly pulled out. At the same time, the connecting part 320 enhances the connection strength of the flexible cable 500 and the support 300.

[0112] Specifically, the connecting part 320 can be designed to be adapted to the structure of the flexible cable 500, such as providing a threaded hole, a hook or a clamping groove, etc. If a threaded connection is adopted, a reliable fastening force can be provided after tightening; the hook and the clamping groove can make the flexible cable 500 and the support 300 fit tightly, and when the flexible cable 500 is pulled to take out the bearing bush 400, the connecting part 320 can withstand a large pulling force, preventing the flexible cable 500 from falling off the support 300, and ensuring the smooth progress of the bearing bush 400 dismounting work.

[0113] According to the embodiments of the present application, on the other hand, as shown in the drawings, Figures 1 to 5As shown, a wind power generation device is also provided, comprising a wind power generation blade and a detachable limiting structure.

[0114] Specifically, as shown, Figure 5 the wind power generation blade has a root circle 100 and a root flange 200, the root circle 100 is provided with a plurality of bolt sleeves 110 in an annular array, and the root flange 200 is provided with a plurality of flange holes 210 corresponding to the bolt sleeves 110.

[0115] Specifically, the support 300 and the bearing bush 400 are detachably arranged in the bolt sleeve 110 and the flange hole 210.

[0116] This wind power generation device, in the process of assembling, transporting, hoisting, etc. of the wind power generation blade, through the abutment of the bearing bush 400 with the bolt sleeve 110 and the flange hole 210 respectively, ensures the alignment accuracy of the root circle 100 and the root flange 200, effectively limits the relative displacement of the root circle 100 and the root flange 200, prevents the alignment deviation caused by stress release or external force, so as to facilitate the bolt to pass through the bolt sleeve 110 and the flange hole 210, and ensure that the wind power generation blade can be normally installed.

[0117] In one embodiment, as shown, Figure 5 the wind power generation device further comprises a hub 600, the hub 600 is provided with a variable pitch bearing 610, and the variable pitch bearing 610 is provided with a plurality of bearing holes 620 corresponding to the flange holes 210. In the state that the wind power generation blade is connected with the hub 600, the end of the support 300 away from the bearing bush 400 is inserted into the bearing hole 620.

[0118] When the wind power generation blade is hoisted to the sky and connected with the hub 600, the end of the support 300 away from the bearing bush 400 can be inserted into the bearing hole 620, so that the positions of the flange hole 210 and the bearing hole 620 correspond, and the positions of the wind power generation blade and the hub 600 correspond, so as to facilitate the subsequent use of bolts to connect the wind power generation blade with the hub 600. After the connection by pre-tightening the bolts, since the bearing bush 400 and the support 300 are detachably arranged, the support 300 can be pulled out of the bearing hole 620 of the hub 600 first, and then the plurality of bearing bushes 400 can be taken out of the bearing hole 620.

[0119] The installation process of the wind power generation device in this embodiment is described as follows:

[0120] 1. Assemble the detachable limiting structure:

[0121] First, one end of the flexible cable 500 is inserted through the accommodating groove 460 and connected with the connecting hole 450, so that one end of the flexible cable 500 is fixed on the bearing bush 400, and the other end of the flexible cable 500 is connected with the connecting part 320 of the support 300, so that the other end of the flexible cable 500 is fixed on the support 300. Then, the plurality of bearing bushes 400 are arranged on the outer wall surface of the support 300 in a ring shape, and the stop end 420 of the bearing bush 400 is inserted into the clamping gap 313, so that the bearing bush 400 is in a cooperating state with the support 300.

[0122] 2. In the process of wind power blade assembly, transportation, hoisting, etc., the detachable limiting structure is installed in the wind power blade:

[0123] The bearing bush 400 in the cooperating state and the support 300 are inserted into the bolt sleeve 110 and the flange hole 210, so that the outer wall surface of the first abutting section 430 of the bearing bush 400 abuts against the inner wall surface of the bolt sleeve 110, and the outer wall surface of the second abutting section 440 abuts against the hole wall surface of the flange hole 210. Through the abutment of the bearing bush 400 with the bolt sleeve 110 and the flange hole 210 respectively, the alignment accuracy of the blade root joint circle 100 and the blade root flange 200 is ensured, the relative displacement of the blade root joint circle 100 and the blade root flange 200 is effectively limited, and the alignment deviation caused by stress release or external force is prevented, so that the bolt can be inserted into the bolt sleeve 110 and the flange hole 210, and the wind power blade can be normally installed.

[0124] 3. The wind power blade is installed on the hub 600:

[0125] When the wind power blade is hoisted to connect with the hub 600, the end of the support 300 away from the bearing bush 400 can be inserted into the bearing hole 620, so that the flange hole 210 corresponds to the position of the bearing hole 620, the position of the wind power blade corresponds to the position of the hub 600, and the wind power blade and the hub 600 are connected by using the bolt subsequently. After the bolt is pre-tightened and connected, since the bearing bush 400 and the support 300 are detachably arranged, the support 300 can be pulled out of the bearing hole 620 of the hub 600 first, and then the plurality of bearing bushes 400 can be taken out of the bearing hole 620 through the flexible cable 500.

[0126] Wherein, the terms such as "upper", "lower", etc. are used to describe the relative position relationship of each structure in the drawings, which is only for the convenience of clear description, and does not limit the scope of the application. The change or adjustment of the relative relationship is also considered as the scope of the application without substantial change of the technical content.

[0127] It should be noted that in the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact or indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0128] In addition, in the present application, unless specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0129] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A detachable limiting structure, characterized in that, The application relates to a bearing assembly. The bearing assembly comprises a support (300) and a plurality of bearing bushes (400). The bearing bushes (400) have an insertion end (410) and a stop end (420) opposite to the insertion end (410).

2. The detachable limiting structure according to claim 1, wherein, Along the direction from the insertion end (410) to the stop end (420), the bearing bushes (400) are sequentially provided with a first abutting section (430) and a second abutting section (440).

3. The detachable limiting structure according to claim 2, wherein, Along the circumferential direction of the support (300), the inner wall surfaces of the plurality of bearing bushes (400) are detachably and circumferentially arranged on the outer wall surface of the support (300). The outer wall surface of the support (300) is provided with a limiting part (310).

4. The detachable limiting structure according to claim 1, wherein, The limiting part (310) is in abutment with the stop end (420) of the bearing bushes (400).

5. The detachable limiting structure according to claim 4, characterized in that, The limiting part (310) comprises a limiting ring (311) and a plurality of limiting blocks (312).

6. The detachable limiting structure according to claim 5, characterized in that, The limiting ring (311) is coaxially arranged on the support (300).

7. The detachable limiting structure according to claim 5, wherein, Along the circumferential direction of the limiting ring (311), the plurality of limiting blocks (312) are annularly and spacedly arranged on the limiting ring (311).

8. The detachable limiting structure according to any one of claims 1-7, characterized in that, Any two adjacent limiting blocks (312) form a clamping gap (313). The stop end (420) of the bearing bushes (400) is adapted to be inserted into the clamping gap (313).

9. The detachable limiting structure according to any one of claims 1-7, wherein, The detachable limiting structure further comprises a plurality of flexible ropes (500). The plurality of flexible ropes (500) are one-to-one corresponding to the plurality of bearing bushes (400).

10. The detachable limiting structure according to any one of claims 4-7, characterized in that, One end of the flexible rope (500) is connected to the bearing bush (400), and the other end is connected to the support (300).

11. A wind power plant, characterized in that The bearing bush (400) is provided with a connecting hole (450) at the stop end (420). The flexible rope (500) is connected to the connecting hole (450) through the connecting hole (450). The inner wall surface of the bearing bush (400) is provided with a containing groove (460) at the stop end (420). The flexible rope (500) is connected to the connecting hole (450) through the containing groove (460). The outer wall surface of the bearing bush (400) is provided with a stepped groove (470) at the stop end (420). The stepped groove (470) is adapted to contain the flexible rope (500). The insertion end (410) of the bearing bush (400) is provided with a first chamfer (480). Along the direction from the insertion end (410) to the stop end (420), the thickness of the bearing bush (400) at the first chamfer (480) gradually increases. The first abutting section (430) and the second abutting section (440) are connected to each other. Along the direction from the insertion end (410) to the stop end (420), the thickness of the bearing bush (400) at the second chamfer (490) gradually increases. The support (300) is provided with a connecting part (320). The flexible rope (500) is connected to the support (300) through the connecting part (320). The application relates to a bearing assembly. The wind power generation blade has a root joint circle (100) and a root flange (200), a plurality of bolt sleeves (110) are arranged in the root joint circle (100) in an annular array, and a plurality of flange holes (210) are arranged on the root flange (200) corresponding to the bolt sleeves (110); The detachable limiting structure according to any one of claims 1 to 10, the support piece (300) and the bearing bush (400) are detachably arranged in the bolt sleeve (110) and the flange hole (210).

12. The wind power plant according to claim 11, characterized in that The wind power generation device further comprises a hub (600), the hub (600) is provided with a variable pitch bearing (610), and a plurality of bearing holes (620) are arranged on the variable pitch bearing (610) corresponding to the flange holes (210). In the state that the wind power generation blade is connected with the hub (600), one end of the support piece (300) away from the bearing bush (400) is inserted into the bearing hole (620).

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