Fastener and assembly for repairing cabin shell of wind turbine generator

Abstract

The utility model relates to a fastener and an assembly for repairing a cabin shell of a wind turbine generator. The fastener comprises a threaded rod, a compression sleeve and a T-shaped nut, the assembly includes a fastener and an assembly pad. The device has the advantages that the fastener enables a worker to lock and repair the crack part of the shell only in the cabin of the wind turbine generator system, so that the worker does not need to go out of the cabin, the safety of the worker is ensured, the repair effect is firm, and meanwhile, the device can be freely disassembled as required. Under the conditions that the crack length is large and the crack position is different, the stability of the repaired crack part is ensured, and the repairing effect is very firm; the fixing device is convenient to mount and dismount, firm in fixation and very suitable for being used in a small space.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to fasteners and assemblies used for repairing a nacelle shell of a wind turbine generator set. Background Art

[0002] The shell of the wind turbine nacelle has two layers of shells stacked and connected. During long-term use, the two layers of shells are prone to cracking. In order to ensure the normal operation of the wind turbine, it is necessary to repair the cracked parts of the shell of the wind turbine nacelle. The traditional repair method is to re-bond the cracked parts of the two layers of shells with sealant or re-fix the cracked parts of the two layers of shells together by riveting.

[0003] Although the above two methods can repair the cracked parts of the two shells, there are some problems. For the repair method of sealant bonding, the repair effect is still not strong enough; for the rivet riveting method, when the crack width between the two shells is large, the length of the rivet may not be enough for repair, and even if it is repaired, it is easy to be loose, and the rivet cannot be freely disassembled after riveting.

[0004] At present, the above technical issues have not been properly resolved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide fasteners and assemblies for repairing the shell of a wind turbine nacelle, so as to solve the technical problem that when the shell of the wind turbine nacelle is cracked, the repair effect is not very strong according to the traditional repair methods of sealant bonding and rivet riveting, and the shell cannot be freely disassembled after repair by rivet riveting.

[0006] The above utility model object of the utility model is achieved through the following technical solutions:

[0007] In a first aspect, the utility model provides a fastener for repairing a nacelle shell of a wind turbine generator set, which is used to repair the nacelle shell of a wind turbine generator set. The fastener comprises:

[0008] A threaded rod, a round cake is fixed to the first end of the threaded rod, and the diameter of the round cake is larger than the outer diameter of the threaded rod;

[0009] A compression sleeve, the compression sleeve is sleeved on the threaded rod, the outer diameter of the compression sleeve is equal to the diameter of the round cake, the compression sleeve comprises a plurality of two circular rings and a plurality of connecting rods, the plurality of connecting rods are arranged between the two circular rings in a circular array, and the ends of the connecting rods are connected to the circular rings;

[0010] A T-nut, which is sleeved on the threaded rod and threadedly connected to the threaded rod;

[0011] Among them, when the first end of the T-nut abuts against the second end of the compression sleeve and the first end of the compression sleeve abuts against the disc, the T-nut continues to be screwed in relative to the threaded rod, and several of the connecting rods are bent to form a limiting portion.

[0012] Some embodiments thereof further include a plurality of elongated threaded rods, both ends of which are arranged as planes, a threaded head is fixed at the center of the first end of the elongated threaded rod, a threaded hole is opened at the center of the second end of the elongated threaded rod, and when two adjacent elongated threaded rods are connected, the threaded head of one of the elongated threaded rods is threadedly connected to the threaded hole of another elongated threaded rod;

[0013] The second end of the threaded rod is arranged as a plane, and a threaded hole / threaded head is arranged at the second end of the threaded rod, and is threadedly connected with the threaded head / threaded hole of the extended threaded rod.

[0014] As some embodiments thereof, the outer diameter of the threaded head is smaller than the inner diameter of the extended threaded rod, and the outer diameter / inner diameter / pitch of the extended threaded rod are the same as the outer diameter / inner diameter / pitch of the threaded rod.

[0015] In some embodiments, the number of the connecting rods is at least three.

[0016] As some of the embodiments, a spring washer and a flat washer are sequentially sleeved on the T-nut.

[0017] In a second aspect, the utility model provides an assembly, comprising:

[0018] At least two fasteners as described in the first aspect;

[0019] A combined pad, wherein at least two connection holes are provided on the combined pad, the connection holes are arranged in a one-to-one correspondence with the fasteners, and the connection holes are sleeved with the T-nuts of the fasteners.

[0020] In summary, the beneficial technical effects are as follows:

[0021] The fasteners allow the staff to lock and repair the cracked part of the shell only inside the wind turbine cabin, without having to leave the cabin for operation, ensuring the safety of the personnel, and the repair effect is firm, and it can also be freely disassembled as needed. The assembly ensures the stability of the cracked part after repair when the crack length is large and the crack position is different, and the repair effect is very firm; this application is easy to install and disassemble, firmly fixed, and is very suitable for use in small spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a structural schematic diagram of a fastener in an embodiment of the utility model;

[0023] Figure 2 Schematic diagram of the use state of the fastener in the embodiment of the utility model (I);

[0024] Figure 3 This is a schematic diagram of the use state of the fastener in the embodiment of the utility model (II);

[0025] Figure 4 for Figure 3 A schematic diagram of the structure of the connecting rod;

[0026] Figure 5 It is a schematic diagram of a half-section structure of an extended threaded rod in an embodiment of the utility model;

[0027] Figure 6 It is a schematic diagram of the structure of the assembly in the embodiment of the utility model.

[0028] Reference numerals:

[0029] 100. Fastener; 101. Threaded rod; 102. Round cake; 103. Compression sleeve; 104. T-nut; 105. Extended threaded rod; 106. Spring washer; 107. Flat washer; 108. Connecting rod; 200. Combined pad. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Embodiment 1

[0034] like Figure 1 As shown, the fastener 100 for repairing the shell of a wind turbine nacelle disclosed in the utility model is used to repair the shell of a wind turbine nacelle. The fastener 100 includes a threaded rod 101, a compression sleeve 103 and a T-nut 104. Among them, a disc 102 is fixed to the first end of the threaded rod 101, and the diameter of the disc 102 is larger than the outer diameter of the threaded rod 101; the compression sleeve 103 is sleeved on the threaded rod 101, and the outer diameter of the compression sleeve 103 is equal to the diameter of the disc 102. The compression sleeve 103 includes a plurality of two circular rings and a plurality of connecting rods 108. The plurality of connecting rods 108 are arranged in a circular array between the two circular rings, and the ends of the connecting rods 108 are connected to the circular rings; the T-nut 104 is sleeved on the threaded rod 101 and is threadedly connected to the threaded rod 101; wherein, when the first end of the T-nut 104 abuts against the second end of the compression sleeve 103 and the first end of the compression sleeve 103 abuts against the disc 102, the T-nut 104 continues to be screwed in relative to the threaded rod 101, and the plurality of connecting rods 108 are bent to form a limiting portion.

[0035] Specifically, the number of the connecting rods 108 is at least three.

[0036] As some embodiments, the number of connecting rods 108 is four, and when the first end of the compression sleeve 103 abuts against the disc 102, the T-nut 104 continues to screw in relative to the threaded rod 101, and the connecting rod 108 bends to form a cross shape.

[0037] The T-nut 104 includes a hexagonal nut and a cylinder, which are coaxial and integrally formed. The end surface area of ​​the cylinder is smaller than that of the hexagonal nut. The first end of the hexagonal nut is connected to the second end of the cylinder. The first end of the cylinder is close to the compression sleeve 103. The outer diameter of the cylinder is larger than the outer diameter of the compression sleeve 103. A threaded through hole is coaxially provided on the T-nut 104 to threadably match the threaded rod 101. The axial length of the cylinder is much larger than that of the hexagonal nut.

[0038] The usage process of this embodiment is as follows:

[0039] like Figure 2-Figure 4 As shown, when the adjacent two layers of the shell of the wind turbine nacelle are cracked, the maintenance personnel operate an electric drill inside the nacelle to simultaneously penetrate the adjacent two shells and make coaxial holes, the diameter of the hole being equal to the end face diameter of the cylinder. The maintenance personnel make the entire fastener 100 pass through the hole from the inside of the nacelle with the disk 102 facing forward, and when the compression sleeve 103 passes through the hole as a whole, the T-nut 104 is screwed in the direction close to the disk 102, and when the first end of the cylinder collides with the compression sleeve 103 and the first end of the hexagonal nut collides with the inner wall of the shell, the T-nut 104 is continuously tightened, and multiple connecting rods 108 are bent to form a cross shape to clamp the outer wall of the shell, and the cylinder of the T-nut 104 blocks the hole until it can no longer be tightened, and at this point, the fastener 100 locks the cracked part of the shell, and the repair is completed.

[0040] like Figure 1-Figure 5 As shown, as some embodiments thereof, the fastener 100 also includes a plurality of extended threaded rods 105, both ends of the extended threaded rods 105 are set as planes, a threaded head is fixed at the center of the first end of the extended threaded rod 105, a threaded hole is opened at the center of the second end of the extended threaded rod 105, and when two adjacent extended threaded rods 105 are connected, the threaded head of one extended threaded rod 105 is threadedly connected to the threaded hole of the other extended threaded rod 105; the second end of the threaded rod 101 is set as a plane, the second end of the threaded rod 101 is provided with a threaded hole / threaded head, and is threadedly connected to the threaded head / threaded hole of the extended threaded rod 105.

[0041] The number of the lengthened threaded rods 105 is set according to the crack width and the thickness of the cabin shell, thereby increasing or decreasing the length of the fastener 100 .

[0042] Among them, one side of the extended threaded rod 105 / threaded rod 101 with the threaded hole symmetrically forms two planes, which is convenient for tool clamping to add or remove the extended threaded rod 105, and convenient for tool clamping to tighten the T-nut 104.

[0043] When the thickness of the nacelle shell is relatively thick or the crack width is relatively large, the length of the fastener 100 is increased by threading the second end of the threaded rod 101 to extend the threaded rod 105 .

[0044] The extended threaded rod 105 can be continuously added or removed to accommodate different crack widths and shell thicknesses.

[0045] During specific use, during the above-mentioned use process, if the compression sleeve 103 is passed through the hole as a whole, and the length of the single threaded rod 101 is not enough for the T-nut 104 to be screwed in, an appropriate number or length of extended threaded rods 105 can be added to be threadedly connected with the previous threaded rod 101 to facilitate the T-nut 104 to be screwed in. After the fastener 100 locks the cracked part of the shell, if the extended threaded rod 105 is not used, the extended threaded rod 105 will be removed again.

[0046] As some embodiments thereof, the outer diameter of the thread head is smaller than the inner diameter of the lengthened threaded rod 105 , and the outer diameter / inner diameter / pitch of the lengthened threaded rod 105 are the same as the outer diameter / inner diameter / pitch of the threaded rod 101 .

[0047] As some of the embodiments, a spring washer 106 and a flat washer 107 are sequentially sleeved on the T-nut 104 .

[0048] The spring washer 106 and the flat washer 107 can prevent the T-nut 104 from loosening.

[0049] The advantage of this embodiment is that the staff only needs to lock and repair the cracked part of the outer shell inside the wind turbine cabin, and there is no need to go out of the cabin to work, thus ensuring the safety of the staff, and the repair effect is firm, and it can also be freely disassembled as needed.

[0050] Embodiment 2

[0051] The utility model provides a combination, comprising at least two fasteners 100 and a combination pad 200 as in the first aspect, wherein at least two connection holes are provided on the combination pad 200, the connection holes are arranged in one-to-one correspondence with the fasteners 100, and the connection holes are sleeved with the T-nuts 104 of the fasteners 100.

[0052] During installation, the combined pad 200 is located between the T-nut 104 and the housing.

[0053] like Figure 6 As shown, when the crack is relatively long, a combined pad 200 with three connecting holes is selected, and the round cake 102 is passed through the connecting holes in a forward state in turn, and then passed through the holes punched on the outer shell in the manner of Example 1 to perform combined locking of the crack to ensure stability after the crack is repaired.

[0054] According to the length, position and actual situation of the crack, a single fastener 100 or a combination is selected to lock the crack of the housing, so as to ensure the stability of the cracked part after repair.

[0055] The advantages of this embodiment are: when the crack length is large and the crack positions are different, the stability of the cracked part after repair is guaranteed, and the repair effect is very strong; the application is easy to install and disassemble, firmly fixed, and is very suitable for use in smaller spaces.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and the protection scope of the utility model is not limited thereto, and the above embodiments can be used in combination with each other. Therefore, all equivalent changes made according to the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A fastener for repairing the nacelle shell of a wind turbine generator set, characterized in that: Used to repair the nacelle shell of wind turbines, the fasteners include: A threaded rod (101), a round cake (102) being fixed to a first end of the threaded rod (101), and a diameter of the round cake (102) being larger than an outer diameter of the threaded rod (101); A compression sleeve (103), the compression sleeve (103) is sleeved on the threaded rod (101), the outer diameter of the compression sleeve (103) is equal to the diameter of the round cake (102), the compression sleeve (103) comprises a plurality of two circular rings and a plurality of connecting rods (108), the plurality of connecting rods (108) are arranged between the two circular rings in a circular array, and the ends of the connecting rods (108) are connected to the circular rings; A T-shaped nut (104), wherein the T-shaped nut (104) is sleeved on the threaded rod (101) and is threadedly connected to the threaded rod (101); In which, when the first end of the T-nut (104) abuts against the second end of the compression sleeve (103), and the first end of the compression sleeve (103) abuts against the disc (102), the T-nut (104) continues to be screwed in relative to the threaded rod (101), and a plurality of the connecting rods (108) are bent to form a limiting portion.

2. The fastener according to claim 1, characterized in that It also comprises a plurality of extended threaded rods (105), both ends of the extended threaded rods (105) are arranged as planes, a thread head is fixed at the center of the first end of the extended threaded rod (105), a threaded hole is opened at the center of the second end of the extended threaded rod (105), and when two adjacent extended threaded rods (105) are connected, the thread head of one of the extended threaded rods (105) is threadedly connected to the threaded hole of another extended threaded rod (105); The second end of the threaded rod (101) is arranged as a plane, and the second end of the threaded rod (101) is provided with a threaded hole / threaded head, and is threadedly connected with the threaded head / threaded hole of the extended threaded rod (105).

3. The fastener according to claim 2, characterized in that The outer diameter of the threaded head is smaller than the inner diameter of the extended threaded rod (105), and the outer diameter / inner diameter / pitch of the extended threaded rod (105) is the same as the outer diameter / inner diameter / pitch of the threaded rod (101).

4. The fastener according to claim 1, characterized in that The number of the connecting rods (108) is at least three.

5. The fastener according to claim 1, characterized in that The T-shaped nut (104) is sleeved with a spring washer (106) and a flat washer (107) in sequence.

6. An assembly, characterized in that: include: At least two fasteners (100) according to any one of claims 1 to 5; A combined pad (200) is provided with at least two connection holes, the connection holes are arranged in one-to-one correspondence with the fasteners (100), and the connection holes are sleeved with the T-shaped nuts (104) of the fasteners (100).

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