Blade root protection device of wind power blade

Abstract

The utility model relates to the technical field of protection of wind power blades, and discloses a blade root protection device of a wind power blade, which comprises a protection cover, the protection cover comprises an end cover body and an outer ring cover body, the end cover body is used for covering the end part, close to the blade root, of the wind power blade, and the outer ring cover body is used for covering the end part of the wind power blade. The outer ring part cover body extends from the edge of the end part cover body along the axial direction of the wind power blade and covers the surface of the wind power blade, and a tightening mechanism is arranged on the outer ring part cover body and is used for tightening and fixing the protective cover on the wind power blade. The influence on the performance due to smudginess or corrosion in the transportation process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine blade protection, in particular to a blade root protection device for a wind turbine blade. Background Art

[0002] The performance of wind turbine blades will directly affect the utilization efficiency of wind energy and the load on the unit, and to a large extent determine the overall performance of wind turbines and the economic efficiency of wind power development and utilization. Wind turbine blades bear the centrifugal force generated by rotation, their own gravity, and the pressure of wind on the blade surface, which are transmitted to the generator hub through the blade root. Therefore, sufficient attention should be paid to the strength of the blade root and its connection structure.

[0003] Existing wind turbine blades are prone to dirt or corrosion at the root after long-distance transportation, especially long-distance cross-sea transportation. Among them, dirt will affect the corporate image, and corrosion will directly affect the strength of the connecting parts at the root of the blade, which will have an adverse effect on the performance of the wind turbine blade. Therefore, it is very necessary to effectively protect the root of the wind turbine blade. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the blade roots of existing wind turbine blades are easily dirty or corroded after transportation, thereby affecting performance, and to provide a blade root protection device for wind turbine blades. The blade root protection device can effectively protect the roots of wind turbine blades and avoid the problem that the roots are dirty or corroded during transportation, thereby affecting performance.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a blade root protection device for a wind turbine blade, which comprises a protective cover, wherein the protective cover comprises an end cover body and an outer ring cover body, wherein the end cover body is used to cover the end of the wind turbine blade close to the blade root, and the outer ring cover body extends from the edge of the end cover body along the axial direction of the wind turbine blade and covers the surface of the wind turbine blade, and the outer ring cover body is provided with a tightening mechanism for tightening and fixing the protective cover on the wind turbine blade.

[0006] Optionally, a blade flange is provided at the end of the wind turbine blade close to the blade root, a plurality of bolt holes are provided on the blade flange, a plurality of through holes are provided at the edge of the end cover, and the plurality of through holes correspond to the plurality of bolt holes one by one;

[0007] The blade root protection device also includes a plurality of sealing parts, which correspond one to one with the plurality of bolt holes. The sealing parts include a plug and a pressure cover arranged at one end of the plug. The plug is used to pass through the through hole and be inserted into the bolt hole. The pressure cover is used to press and fix the end cover to the end of the wind turbine blade when the plug is inserted into the bolt hole.

[0008] Optionally, a Velcro tape capable of adhering to each other is provided between the pressure cover and the end cover body.

[0009] Optionally, the length of the plug is 5-10 mm.

[0010] Optionally, the length of the outer ring cover in the axial direction of the wind turbine blade is 300-400 mm.

[0011] Optionally, the tightening mechanism includes a tightening rope, and one end of the outer ring cover away from the end cover is rolled up to form a cavity surrounding the wind turbine blade. The tightening rope is inserted into the cavity to tighten the end of the outer ring cover away from the end cover on the surface of the wind turbine blade.

[0012] Optionally, a tightening device is provided on the tightening rope, and the tightening device is used to tighten the tightening rope.

[0013] Optionally, a closable manhole is provided on the end cover for workers to enter the interior of the wind turbine blade; and / or

[0014] The end cover body is provided with a document bag for storing documents.

[0015] Optionally, the blade root protection device also includes a tightening mechanism, which includes a tightening belt arranged in the middle of the outer ring cover body, the tightening belt extends along the circumference of the outer ring cover body, one end of the tightening belt is fixed to the outer ring cover body, and the other end is fixed to the outer ring cover body through a Japanese buckle.

[0016] Optionally, a plurality of the tightening mechanisms are provided, and the plurality of the tightening mechanisms are arranged at intervals along the circumference of the outer ring cover.

[0017] In the utility model, the blade root protection device is configured to include a protective cover, the protective cover has an end cover body that can cover the end of the wind turbine blade close to the blade root, the outer ring cover body extends from the edge of the end cover body along the axial direction of the wind turbine blade and covers the surface of the wind turbine blade, and the entire protective cover is tightened and fixed on the wind turbine blade in cooperation with the tightening mechanism, thereby effectively protecting the root of the wind turbine blade to prevent it from becoming dirty or corroded during transportation and affecting its performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the blade root protection device provided by the utility model;

[0019] Figure 2 It is a side view of the blade root protection device provided by the utility model;

[0020] Figure 3 yes Figure 2 A magnified schematic diagram of position A in the middle;

[0021] Figure 4 It is a structural schematic diagram of a plugging piece for plugging a bolt hole in the utility model.

[0022] Description of Reference Numerals

[0023] 1. Wind turbine blades; 2. Rain cover; 3. Blade transport bracket; 10. Protective cover; 11. End cover; 111. Through hole; 112. Manhole; 113. Document bag; 12. Outer ring cover; 121. Cavity; 20. Blade flange; 21. Bolt hole; 30. Sealing piece; 31. Plug; 32. Pressure cover; 40. Tightening rope; 41. Tightener; 50. Tightening belt; 501. First section; 502. Second section; 503. Third section; 51. Japanese buckle; 52. Mother buckle; 53. Child buckle. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0025] Combination Figure 1 As shown, the utility model provides a blade root protection device for a wind turbine blade, which comprises a protection cover 10, wherein the protection cover 10 comprises an end cover body 11 and an outer ring cover body 12, wherein the end cover body 11 is used to cover the end of the wind turbine blade 1 close to the blade root, and the outer ring cover body 12 extends from the edge of the end cover body 11 along the axial direction of the wind turbine blade 1 and covers the surface of the wind turbine blade 1, and a tightening mechanism is provided on the outer ring cover body 12 for tightening and fixing the protection cover 10 on the wind turbine blade 1.

[0026] In the technical solution provided by the utility model, the blade root protection device is configured to include a protective cover 10, the protective cover 10 has an end cover body 11 that can cover the end of the wind turbine blade 1 close to the blade root, the outer ring cover body 12 extends from the edge of the end cover body 11 along the axial direction of the wind turbine blade 1 and covers the surface of the wind turbine blade 1, and the entire protective cover 10 is tightened and fixed on the wind turbine blade 1 in cooperation with the tightening mechanism, so that the root of the wind turbine blade 1 can be effectively protected to prevent it from becoming dirty or corroded during transportation and affecting its performance.

[0027] In the utility model, the protective cover 10 can be made of soft, dustproof, easy-to-clean, foldable special nylon or Oxford cloth. The inner surface can be painted with waterproof and breathable paint, which is waterproof and scratch-resistant. The color of the outer surface can be sky blue or silver gray, etc.

[0028] It should be noted that, in the present invention, the outer ring cover 12 is cylindrical as a whole, and is perpendicular to the end cover 11 and connected to the edge of the end cover 11. In a specific embodiment of the utility model, the outer ring cover 12 and the end cover 11 are set as an integrated structure. For example, one end of the outer ring cover 12 is sewn and connected to the edge of the end cover 11; or, the outer ring cover 12 and the end cover 11 are set as a split structure, and when installed at the root position of the wind turbine blade 1, the connection and fixation of the two are achieved by Velcro or magnetic strips.

[0029] In the present invention, in order to facilitate the installation of the protective cover 10 on the root position of the wind turbine blade 1, an installation space should be reserved between the outer ring cover body 12 and the surface of the wind turbine blade 1. In a specific embodiment of the utility model, the inner diameter of the outer ring cover body 12 is 30-50mm larger than the outer diameter of the wind turbine blade 1.

[0030] In the utility model, the end of the wind turbine blade 1 close to the blade root is provided with a blade flange 20, and a plurality of bolt holes 21 are provided on the blade flange 20. A plurality of through holes 111 are provided at the edge of the end cover 11, and the plurality of through holes 111 correspond to the plurality of bolt holes 21 one by one. Figure 4 As shown, the blade root protection device also includes a plurality of sealing members 30, and the plurality of sealing members 30 correspond one-to-one to the plurality of bolt holes 21. The sealing member 30 includes a plug 31 and a pressure cover 32 arranged at one end of the plug 31. The plug 31 is used to pass through the through hole 111 and be inserted into the bolt hole 21, and the pressure cover 32 is used to press and fix the end cover 11 to the end of the wind turbine blade 1 when the plug 31 is inserted into the bolt hole 21.

[0031] For example, 118 M36 bolts are usually provided on a wind turbine blade 1 with a pitch circle of 2800 mm, the bolt hole 21 on the blade flange 20 has a hole diameter of 40 mm, and 118 through holes 111 with a diameter of 40 mm are provided on the end cover 11 .

[0032] It can be understood that by providing the sealing member 30 to seal the bolt hole 21 on the blade flange 20, debris is effectively prevented from entering the bolt hole 21, ensuring that the subsequent bolt installation operation can proceed smoothly; in addition, the sealing member 30 can also press and fix the end cover body 11 to the end of the wind turbine blade 1 while sealing the bolt hole 21, thereby preventing the protective cover 10 from being blown over when the wind and rain are strong.

[0033] It should be noted that, in the present invention, the plugging member 30 may adopt any appropriate structure to seal the bolt hole 21 and simultaneously press the end cover 11. For example, the plug 31 of the plugging member 30 is configured to be able to have an interference fit with the bolt hole 21, and when the plug 31 is inserted into the bolt hole 21, the pressure cap 32 can press and fix the end cover 11 to the end of the wind turbine blade 1.

[0034] In some embodiments, a Velcro tape that can be bonded to each other is provided between the gland 32 and the end cover 11. When the plug 31 is inserted into the bolt hole 21, the Velcro tape that can be bonded to each other provided between the gland 32 and the end cover 11 can also be used to achieve relative fixation of the plugging member 30.

[0035] It should be noted that the Velcro achieves adhesion through the cooperation of the hook surface and the hair surface. The utility model does not specifically limit the installation positions of the hook surface and the hair surface. By way of example, the hook surface is provided on the end cover body 11, and the hair surface is provided on the pressure cover 32. When the two are in contact, the relative fixation of the blocking member 30 can be achieved through the cooperation of the hook surface and the hair surface.

[0036] Combination Figure 1 As shown, in the present invention, because the blade transport brackets 3 of different manufacturers are different, and the blade transport brackets 3 used for sea and land transportation are also very different, the bolt holes for installing the transport bolts are also different. In addition, some manufacturers will choose to install all the blade bolts before shipping the wind turbine blades 1. Therefore, when using the blade root protection device provided by the present invention, the corresponding through hole 111 can be determined according to the position of the transport bolt or the blade bolt, and the blocking piece 30 at the position can be removed before installing the bolt.

[0037] In the utility model, the function of the plug 31 is to be inserted into the bolt hole 21 to prevent debris from entering the bolt hole 21. In order to ensure the sealing effect, the length of the plug 31 should not be too short. At the same time, in order to facilitate subsequent disassembly, the length of the plug 31 should not be too long. In some embodiments, the length of the plug 31 is 5-10 mm.

[0038] In the present utility model, combined with Figure 2 As shown, according to the conventional positioning arrangement of the rain cover 2 of the wind turbine blade 1, the length of the outer ring cover 12 in the axial direction of the wind turbine blade 1 is 300-400 mm. In a specific embodiment of the utility model, the length of the outer ring cover 12 in the axial direction of the wind turbine blade 1 is 350 mm.

[0039] In the present invention, the tightening mechanism is used to tighten and fix the protective cover 10 on the wind turbine blade 1, and the tightening effect directly determines the sustainability of the protection of the blade root.

[0040] In some embodiments, the tightening mechanism includes a tightening rope 40, and the end of the outer ring cover 12 away from the end cover 11 is rolled up to form a cavity 121 surrounding the wind turbine blade 1, and the tightening rope 40 is inserted into the cavity 121 to tighten the end of the outer ring cover 12 away from the end cover 11 on the surface of the wind turbine blade 1.

[0041] In some embodiments, a tightening device 41 is provided on the tightening rope 40, and the tightening device 41 is used to tighten the tightening rope 40. It should be noted that the tightening device 41 is a common device in the prior art that can fix the relative position of the rope, such as a metal spring buckle.

[0042] It should be noted that, in the present invention, the tightening rope 40 can be set to be open, that is, it includes two ends. When the outer ring cover 12 needs to be tightened on the surface of the wind turbine blade 1, the two ends of the tightening rope 40 can be directly tied; or, after the tightening rope 40 is inserted into the cavity 121, the two ends are tied in a relatively loose state, and then the tightening state is adjusted by the tightening device 41 set on the tightening rope 40. It can be understood that by setting the tightening device 41, the tightening effect of the outer ring cover 12 can be conveniently adjusted to ensure that the protective cover 10 is reliably tightened on the wind turbine blade 1.

[0043] Furthermore, in order to more conveniently adjust the tightening effect of the tightening rope 40, a plurality of tighteners 41 are provided, and the plurality of tighteners 41 are arranged on the tightening rope 40 at circumferential intervals along the wind turbine blade 1. In actual operation, it is only necessary to open a notch at the corresponding position of the cavity 121 to expose the tightener 41 for operation by the staff.

[0044] In the present invention, a closable manhole 112 is provided on the end cover 11 for workers to enter the interior of the wind turbine blade 1. Figure 1 As shown, an arc-shaped slit is provided on the end cover 11 and sealed by a sealing zipper. When the sealing zipper is opened and the end cover 11 is lifted upward, a manhole 112 for workers to enter the interior of the wind turbine blade 1 is formed. For example, in order to facilitate workers to enter the interior of the wind turbine blade 1, the radius of the manhole 112 needs to be greater than or equal to 500 mm. In addition, in order to achieve waterproofing, a sealing cover cloth is provided at the upper edge of the slit.

[0045] In the present invention, a document bag 113 is provided on the end cover 11 for storing documents. It is understandable that the documents stored in the document bag 113 include but are not limited to the instruction manual of the wind turbine blade 1. The document bag 113 is made of a transparent and waterproof material, and a sealing cover cloth is provided at the upper edge of the document bag 113 to achieve waterproofing.

[0046] In the present invention, for easy identification, the end cover 11 is also provided with information such as the company logo and the model of the wind turbine blade 1 .

[0047] In some embodiments, the blade root protection device further includes a tightening mechanism, which includes a tightening belt 50 disposed in the middle of the outer ring cover 12, the tightening belt 50 extending along the circumference of the outer ring cover 12, one end of the tightening belt 50 is fixed to the outer ring cover 12, and the other end is fixed to the outer ring cover 12 through a Japanese buckle 51. In specific use, the outer ring cover 12 can be pulled or released by adjusting the relative position of the other end of the tightening belt 50 on the Japanese buckle 51, thereby adjusting the tightness of the outer ring cover 12 covering the surface of the wind turbine blade 1.

[0048] It is understandable that in order to facilitate the adjustment of the tightness of the outer ring cover 12 covering the surface of the wind turbine blade 1 at multiple positions, in some embodiments, multiple tightening mechanisms are provided, and the multiple tightening mechanisms are arranged at intervals along the circumference of the outer ring cover 12.

[0049] See also Figure 3 In a specific embodiment of the utility model, the tightening belt 50 is provided with three sections, which are the first section 501, the second section 502 and the third section 503 in the circumferential direction along the outer ring cover body 12; one end of the first section 501 is fixed to the outer ring cover body 12, and the other end is provided with a female buckle 52; one end of the third section 503 is fixed to the outer ring cover body 12, and the other end is provided with a Japanese buckle 51; one end of the second section 502 is provided with a sub-buckle 53 that can be snap-fitted with the female buckle 52, and the other end is passed through the Japanese buckle 51 for adjusting tightness.

[0050] It can be understood that in the present invention, by providing a tightening mechanism at the end of the outer ring cover 12 away from the end cover 11 and providing a tightening mechanism at the middle position of the outer ring cover 12, the protective cover 10 is firmly fixed to prevent it from falling off.

[0051] When the blade root protection device provided by the utility model is used, the protective cover 10 is sleeved on the end of the wind turbine blade 1 close to the blade root, and the protective cover 10 is rotated so that the end cover body 11 is at a correct angle, and the correct angle refers to aligning the manhole 112 and the document bag 113 on the end cover body 11; according to the situation of installing the transport bolts or blade bolts as needed, the through holes 111 and bolt holes 21 at the corresponding positions are retained, and the through holes 111 and bolt holes 21 at the remaining positions are all arranged with plugging pieces 30, and the excess plugging pieces 30 can be placed in the document bag 113 for next use. Arrange the outer ring cover body 12, and use the tightening mechanism to tighten the middle position of the outer ring cover body 12 so that it is close to the surface of the wind turbine blade 1; use the tightening mechanism to tighten and fix the end of the outer ring cover body 12 away from the end cover body 11 to the surface of the wind turbine blade 1. Pass the transport bolts or blade bolts through the installation holes of the blade transport bracket 3 and the through holes 111 on the end cover 11 to complete the installation and fixation of the blade transport bracket 3; put the documents to be shipped with the blade into the document bag 113. When the wind turbine blade 1 is transported to the target site, it is necessary to remove the blade transport bracket 3 and the blade root protection device before hoisting, remove the transport bolts, loosen the tightening mechanism and the tightening mechanism respectively, take out the blocking piece 30 from the bolt hole 21 of the blade flange 20, and then remove the blade root protection device as a whole, and then install all the blocking pieces 30 on the through holes 111 of the end cover 11, clean and organize, and fold and store them for next use.

[0052] The blade root protection device provided by the utility model can wrap the blade flange 20 and the part of the blade root between the blade flange 20 and the rain cover 2 as a whole, which can not only prevent the end of the wind turbine blade 1 close to the blade root from being contaminated during transportation, but also prevent the metal parts at the blade root from being corroded, thereby affecting the strength of the connecting parts of the blade root.

[0053] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A blade root protection device for a wind turbine blade, characterized in that: The blade root protection device comprises a protection cover (10), wherein the protection cover (10) comprises an end cover body (11) and an outer ring cover body (12), wherein the end cover body (11) is used to cover the end of a wind turbine blade (1) close to the blade root, and the outer ring cover body (12) extends from the edge of the end cover body (11) along the axial direction of the wind turbine blade (1) and covers the surface of the wind turbine blade (1), and a tightening mechanism is provided on the outer ring cover body (12) for tightening and fixing the protection cover (10) on the wind turbine blade (1).

2. The blade root protection device for a wind turbine blade according to claim 1, characterized in that: The end of the wind turbine blade (1) close to the blade root is provided with a blade flange (20), and a plurality of bolt holes (21) are provided on the blade flange (20); a plurality of through holes (111) are provided at the edge of the end cover (11), and the plurality of through holes (111) correspond one-to-one to the plurality of bolt holes (21); The blade root protection device also includes a plurality of sealing members (30), the plurality of sealing members (30) corresponding one to one with the plurality of bolt holes (21), the sealing member (30) including a plug (31) and a pressure cover (32) arranged at one end of the plug (31), the plug (31) being used to pass through the through hole (111) and be inserted into the bolt hole (21), and the pressure cover (32) being used to press and fix the end cover (11) to the end of the wind turbine blade (1) when the plug (31) is inserted into the bolt hole (21).

3. The blade root protection device for a wind turbine blade according to claim 2, characterized in that: Velcro tape capable of adhering to each other is provided between the pressure cover (32) and the end cover body (11).

4. The blade root protection device for a wind turbine blade according to claim 2, characterized in that: The length of the plug (31) is 5-10 mm.

5. The blade root protection device for a wind turbine blade according to claim 1, characterized in that: The length of the outer ring cover (12) in the axial direction of the wind turbine blade (1) is 300-400 mm.

6. The blade root protection device for a wind turbine blade according to claim 1, characterized in that: The tightening mechanism comprises a tightening rope (40); one end of the outer ring cover (12) away from the end cover (11) is rolled up to form a cavity (121) surrounding the wind turbine blade (1); the tightening rope (40) is inserted into the cavity (121) to tighten the end of the outer ring cover (12) away from the end cover (11) on the surface of the wind turbine blade (1).

7. The blade root protection device for a wind turbine blade according to claim 6, characterized in that: The tightening rope (40) is provided with a tightening device (41), and the tightening device (41) is used to tighten the tightening rope (40).

8. The blade root protection device for a wind turbine blade according to claim 1, characterized in that: The end cover (11) is provided with a closable manhole (112) for workers to enter the interior of the wind turbine blade (1); and / or The end cover body (11) is provided with a document bag (113) for storing documents.

9. The blade root protection device for a wind turbine blade according to any one of claims 1 to 8, characterized in that: The blade root protection device also includes a tightening mechanism, which includes a tightening belt (50) arranged in the middle of the outer ring cover (12), and the tightening belt (50) is extended along the circumference of the outer ring cover (12), one end of the tightening belt (50) is fixed to the outer ring cover (12), and the other end is fixed to the outer ring cover (12) through a Japanese buckle (51).

10. The blade root protection device for a wind turbine blade according to claim 9, characterized in that: A plurality of the tightening mechanisms are provided, and the plurality of the tightening mechanisms are arranged at intervals along the circumferential direction of the outer ring cover (12).

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