A kind of ring groove rivet, fan blade and wind driven generator

Abstract

The utility model provides a kind of ring groove rivet, fan blade and wind driven generator, the ring groove rivet includes rivet main part, sleeve ring, rivet main part includes thread connection portion, riveting locking portion, neck breaking portion and tail breaking portion connected in turn, the radial dimension of riveting locking portion, tail breaking portion is larger than neck breaking portion, thread connection portion is used to pass through second connecting piece and is connected with first connecting piece thread;Sleeve ring is used to be set on rivet main part and is riveted with riveting locking portion, to be abutted on the side of second connecting piece away from first connecting piece by sleeve ring.The utility model's ring groove rivet can realize unilateral fastening connection, when operating, first the thread connection portion of rivet main part is screwed into first connecting piece;Second sleeve ring is sleeved on the riveting locking portion of rivet main body;Finally, riveting tool is extruded sleeve ring, and simultaneously, using stretcher, the tail breaking portion of rivet main body is pulled off from neck breaking portion, so that sleeve ring is deformed and closely adheres riveting locking portion, and its bottom is also pressed on the surface of second connecting piece away from first connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a ring groove rivet, a wind turbine blade, and a wind turbine generator. Background Technology

[0002] Existing grooved rivets require insertion from one side and anchoring from the other during installation, necessitating the drilling of two through holes in the connected components. However, in situations where only one side can be machined, or where only one side is available for operation after component forming, the rivet head cannot be inserted, thus preventing tightening. This significantly limits the applicability of existing grooved rivets. Utility Model Content

[0003] The purpose of this utility model is to provide a grooved rivet, a wind turbine blade, and a wind turbine generator, which aims to solve the problem that existing grooved rivets cannot achieve unilateral fastening connections.

[0004] To solve the above-mentioned technical problems, the present invention provides a grooved rivet for connecting a first connecting member and a second connecting member, the grooved rivet comprising: The rivet body includes a threaded connection part, a riveting locking part, a neck and a tail connected in sequence. The radial dimension of the riveting locking part and the radial dimension of the tail are both larger than the radial dimension of the neck. The threaded connection part is used to pass through the second connector and then be threadedly connected to the first connector. A collar is used to be fitted onto the rivet body and riveted to the riveting locking part, so as to abut against the side of the second connector away from the first connector.

[0005] In some embodiments, the radial dimension of the riveting locking portion passing through one end of the second connector is larger than the radial dimension of the threaded connection portion, so as to form an annular limiting surface facing away from the neck between the riveting locking portion and the threaded connection portion, the annular limiting surface being used to abut against the side of the first connector near the second connector.

[0006] In some embodiments, the riveting locking portion includes a riveting section for riveting with the collar, and the peripheral side of the riveting section is provided with a plurality of first annular grooves arranged along the axial direction of the rivet body.

[0007] In some embodiments, the radial dimension of the broken neck gradually increases from one end near the riveting locking portion to one end near the broken tail portion.

[0008] In some embodiments, an inner groove is provided on the end face of the broken tail portion away from the broken neck portion, so that the threaded connection portion can be screwed into the first connector through the inner groove.

[0009] In some embodiments, the tail portion includes a connecting section for connection with a tensioner, and the peripheral side of the connecting section is provided with an anti-slip structure.

[0010] In some embodiments, the groove is a slotted groove or a cross groove.

[0011] In some embodiments, the anti-slip structure includes a plurality of second annular grooves arranged along the axial direction of the rivet body.

[0012] In some embodiments, an annular boss is provided on the outer peripheral side of the collar near the threaded connection portion, and the annular boss is used to abut against the side of the second connector away from the first connector.

[0013] To achieve the above objectives, this utility model also provides a fan blade, comprising: A first connector, wherein a threaded hole is provided on the first connector; The second connector is disposed on the side of the first connector near the threaded hole, and a through hole is provided on the second connector, the end of the through hole near the first connector communicating with the threaded hole; A grooved rivet, wherein the grooved rivet is the aforementioned grooved rivet, the threaded connection portion of the rivet body of the grooved rivet is threadedly connected to the threaded hole, the riveting locking portion of the grooved rivet is inserted into the through hole at one end near the threaded connection portion, and the collar of the grooved rivet is riveted to the riveting locking portion and abuts against the side of the second connecting member away from the first connecting member.

[0014] To achieve the above objectives, this utility model also provides a wind turbine generator, including the aforementioned wind turbine blades.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The grooved rivet of this invention can achieve a one-sided fastening connection. During operation, first screw the threaded connection part of the rivet body into the first connector; then put the collar on the riveting locking part of the rivet body; finally, use a riveting tool to squeeze the collar, and at the same time use a tensioner to pull off the broken tail part of the rivet body from the broken neck, so that the collar is deformed and tightly attached to the riveting locking part, and its bottom is also pressed against the surface of the second connector away from the first connector. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the structure after the first and second connecting parts are connected by the ring groove rivet in an embodiment of this utility model; Figure 2 for Figure 1 Schematic diagram of the main structure of the central rivet; Figure 3 for Figure 1 A schematic diagram of the structure when the central riveting locking part is disconnected from the broken neck.

[0018] Explanation of reference numerals in the accompanying drawings of this utility model: 100 grooved rivet, 1 rivet body, 11 threaded connection, 12 riveting locking part, 121 riveting section, 122 first annular groove, 13 broken neck, 131 third annular groove, 14 broken tail, 141 inner groove, 142 connecting section, 143 anti-slip structure, 143 second annular groove, 143a annular limiting surface, 15 collar, 2 annular boss, 200 first connector, 210 threaded hole, 300 second connector, 310 through hole.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] This utility model provides a ring groove rivet. Figures 1 to 3 A preferred embodiment of the grooved rivet provided by this utility model is shown.

[0024] Please see Figures 1 to 3 In some embodiments, the grooved rivet 100 includes a rivet body 1 and a collar 2. The rivet body 1 includes a threaded connection portion 11, a riveting locking portion 12, a neck portion 13, and a tail portion 14 connected in sequence. The radial dimensions of the riveting locking portion 12 and the tail portion 14 are both larger than the radial dimension of the neck portion 13. The threaded connection portion 11 is used to pass through the second connector 300 and then be threadedly connected to the first connector 200. The collar 2 is used to be sleeved on the rivet body 1 and riveted to the riveting locking portion 12, so that it abuts against the side of the second connector 300 away from the first connector 200.

[0025] Specifically, the grooved rivet 100 is used to connect the first connector 200 and the second connector 300 to fix the first connector 200 and the second connector 300 along the axial direction of the grooved rivet 100. Hereinafter, the axial direction of the grooved rivet 100 is defined as up and down. The side of the first connector 200 closer to the second connector 300 is the upper side of the first connector 200, and the side of the first connector 200 away from the second connector 300 is the lower side of the first connector 200.

[0026] The upper surface of the first connector 200 is provided with a threaded hole 210. Due to its large thickness (i.e., the vertical dimension of the first connector 200) or the material itself, it may be impossible to drill a through hole in the first connector 200. However, blind tapping can be performed on the first connector 200 to create the threaded hole 210 on its upper surface. The upper surface of the second connector 300 is provided with a through hole 310 corresponding to the threaded hole 210, with the lower end of the through hole 310 communicating with the threaded hole 210. The through hole 310 and the threaded hole 210 are typically coaxial, and the diameter of the through hole 310 is greater than or equal to the diameter of the threaded hole 210.

[0027] The grooved rivet 100 consists of a rivet body 1 and a collar 2. The rivet body 1 extends vertically and includes, from bottom to top, a threaded connection portion 11, a riveting locking portion 12, a neck portion 13, and a tail portion 14 connected in sequence. The diameter of the neck portion 13 is smaller than the diameters of the riveting locking portion 12 and the tail portion 14, meaning that the neck portion 13 is larger than both the riveting locking portion 12 and the tail portion 14. The length of the threaded connection portion 11 is less than or equal to the depth of the threaded hole 210, the length of the riveting locking portion 12 is greater than the length of the collar 2, and the difference in length between the riveting locking portion 12 and the collar 2 is greater than or equal to the depth of the through hole 310.

[0028] When the first connector 200 and the second connector 300 are fixedly connected by the grooved rivet 100, the first step is to pre-embed the threaded connection part 11 of the rivet body 1 into the first connector 200, that is, first screw the threaded connection part 11 of the rivet body 1 into the threaded hole 210 of the first connector 200, and then install the second connector 300 on the first connector 200; or the threaded connection part 11 of the rivet body 1 can be screwed into the first connector 200 during operation, that is, when the second connector 300 has been installed on the first connector 200, the threaded connection part 11 of the rivet body 1 passes through the through hole 310 of the second connector 300 and then screws into the threaded hole 210 of the first connector 200.

[0029] The second step is to put the collar 2 onto the riveting locking part 12 of the rivet body 1.

[0030] The third step involves using a riveting tool to press the collar 2 while simultaneously using a tensioner to pull up the broken tail 14 of the rivet body 1. This pulls the broken tail 14 from the broken neck 13 of the rivet body 1, causing the collar 2 to deform and press tightly against the riveting locking part 12. The bottom of the collar 2 will also be pressed against the upper surface of the second connector 300. The riveting tool can be a rivet gun, etc. The following description will use a rivet gun as an example.

[0031] The ring groove rivet 100 of this utility model can achieve a one-sided fastening connection. During operation, first screw the threaded connection part 11 of the rivet body 1 into the first connector 200; then put the collar 2 on the riveting locking part 12 of the rivet body 1; finally, use a riveting tool to squeeze the collar 2, and at the same time use a tensioner to pull off the broken tail part 14 of the rivet body 1 from the broken neck 13, so that the collar 2 is deformed and tightly attached to the riveting locking part 12, and its bottom is also pressed against the surface of the second connector 300 away from the first connector 200.

[0032] The diameter of the threaded connection portion 11 can be equal to or smaller than the diameter of the riveting locking portion 12. Optionally, please refer to [reference needed]. Figures 1 to 3In some embodiments, the radial dimension of the end of the riveting locking portion 12 that passes through the second connector 300 is larger than the radial dimension of the threaded connection portion 11, so as to form an annular limiting surface 15 facing away from the neck 13 between the riveting locking portion 12 and the threaded connection portion 11. The annular limiting surface 15 is used to abut against the side of the first connector 200 near the second connector 300.

[0033] Specifically, the lower end of the riveting locking part 12 is located inside the through hole 310, and the diameter of the lower end of the riveting locking part 12 is larger than the diameter of the threaded connection part 11, thereby forming a downward-facing annular limiting surface 15 between the riveting locking part 12 and the threaded connection part 11. Correspondingly, the diameter of the through hole 310 is larger than the diameter of the threaded hole 210, so that the edge of the threaded hole 210 is vertically aligned with the through hole 310. When the threaded connection part 11 of the rivet body 1 is screwed into the threaded hole 210 of the first connector 200, the lower end of the riveting locking part 12 is located inside the through hole 310, and the annular limiting surface 15 abuts against the upper side of the edge of the threaded hole 210. In this way, through the abutment and engagement between the annular limiting surface 15 and the upper surface of the first connector 200, the rivet body 1 and the first connector 200 can be installed and positioned vertically.

[0034] The riveting locking part 12 is used for riveting with the collar 2. Optionally, please refer to [link to relevant documentation]. Figures 1 to 3 In some embodiments, the riveting locking part 12 includes a riveting section 121 for riveting with the collar 2, and the peripheral side of the riveting section 121 is provided with a plurality of first annular grooves 122 arranged along the axial direction of the rivet body 1.

[0035] Specifically, the upper end of the riveting section 121 is located on the upper side of the second connector 300. The upper end of the riveting section 121 can be located inside the collar 2; the upper end of the riveting section 121 can also be flush with the upper end of the collar 2; or the upper end of the riveting section 121 can extend upward beyond the collar 2. The lower end of the riveting section 121 can be located inside the through hole 310; the lower end of the riveting section 121 can also be flush with the lower end of the collar 2; or the lower end of the riveting section 121 can also be located inside the collar 2.

[0036] The circumferential side of the riveting section 121 is provided with a plurality of first annular grooves 122 extending circumferentially along the riveting locking part 12, and the plurality of first annular grooves 122 are arranged in a vertical direction. When the collar 2 is riveted to the riveting section 121 of the riveting locking part 12, part of the collar 2 will deform and extend into the first annular groove 122, so that the collar 2 and the riveting section 121 can be engaged with each other, thus the riveting locking part 12 and the collar 2 can be riveted more firmly.

[0037] The diameter at the broken neck 13 is smaller than the diameter at the riveted locking part 12 and the broken tail 14. The specific shape and style of the broken neck 13 can be set according to the actual situation. Optionally, please refer to Figures 1 to 3 In some embodiments, the radial dimension of the neck 13 gradually increases from one end near the riveting locking portion 12 to one end near the tail portion 14.

[0038] Specifically, the diameter of the neck 13 is gradually reduced from large to small, so that the connection between the neck 13 and the riveting locking part 12 is the thinnest part of the rivet body 1. This ensures that when the tail 14 is pulled off with a tensioner, the rivet body 1 can be properly disconnected from the connection between the neck 13 and the riveting locking part 12.

[0039] To ensure that the rivet body 1 breaks off normally from the neck 13, the tensile force F at the neck 13 is... neck The connection strength must be less than that of the bottom thread (i.e., the connection strength between the threaded connection 11 and the threaded hole 210) F. thread That is, satisfying F neck <F thread .

[0040] The tensile force F at the neck 13th point neck Determined by the tensile strength of the material and the cross-sectional area of ​​the neck, Fneck = σ b ×A neck , where σ b A is the tensile strength of the material of the rivet body 1. neck This is the cross-sectional area at the minimum point of the broken neck 13.

[0041] The connection strength F between the threaded connection part 11 and the threaded hole 210 thread =σ b ×A thread , where A thread The cross-sectional area for thread stress can be calculated according to standard ISO898-1.

[0042] Thread stress cross-sectional area A thread =π / 4(d-0.9382P) 2 Where d is the nominal diameter of the thread and P is the pitch.

[0043] A neck <A thread In practice, a safety factor S needs to be introduced, therefore, SA neck <A thread .

[0044] Optionally, please refer to Figures 1 to 3 In some embodiments, a third annular groove 131 is provided on the peripheral side of the neck 13 near the end of the riveting locking part 12.

[0045] Specifically, a third annular groove 131 extending circumferentially along the neck 13 is provided on the peripheral side of the neck 13, and the third annular groove 131 is located at the connection between the neck 13 and the riveting locking part 12. This helps to ensure that the rivet body 1 is properly disconnected from the connection between the neck 13 and the riveting locking part 12.

[0046] Optionally, please refer to Figures 1 to 3 In some embodiments, an inner groove 141 is provided on the end face of the broken tail portion 14 away from the broken neck portion 13, so that the threaded connection portion 11 can be screwed into the first connector 200 through the inner groove 141.

[0047] Specifically, an inner groove 141 is provided on the upper end face of the tail portion 14 (i.e. the upper end face of the rivet body 1). The inner groove 141 can be a slotted groove or a cross groove, etc., so that a screwdriver or other tool that is compatible with the inner groove 141 can be used to screw the threaded connection portion 11 of the rivet body 1 into the threaded hole 210 of the first connector 200.

[0048] Optionally, please refer to Figures 1 to 3 In some embodiments, the tail portion 14 includes a connecting section 142 for connection with a tensioner, and the peripheral side of the connecting section 142 is provided with an anti-slip structure 143.

[0049] Specifically, when the tensioner pulls the broken tail 14 of the rivet body 1 from the broken neck 13, the tensioner is connected to the connecting section 142 of the broken tail 14, and an anti-slip structure 143 is provided on the peripheral side of the connecting section 142, which can increase the friction between the tensioner and the connecting section 142, and facilitates pulling the broken tail 14 upward through the tensioner.

[0050] The specific configuration of the anti-slip structure 143 can be set according to actual conditions. For example, the anti-slip structure 143 can be an anti-slip groove or a protective protrusion. Optionally, please refer to... Figures 1 to 3 In some embodiments, the anti-slip structure 143 includes a plurality of second annular grooves 143a arranged along the axial direction of the rivet body 1.

[0051] Specifically, the connecting section 142 has a plurality of second annular grooves 143a extending circumferentially along the tail portion 14, and the plurality of second annular grooves 143a are arranged in a vertical direction. The plurality of second annular grooves 143a constitute an anti-slip structure 143. The arrangement of this anti-slip structure 143 is relatively simple.

[0052] Optionally, please refer to Figures 1 to 3 In some embodiments, an annular boss 21 is provided on the outer peripheral side of the collar 2 near the threaded connection portion 11. The annular boss 21 is used to abut against the side of the second connector 300 away from the first connector 200.

[0053] Specifically, an annular boss 21 extending circumferentially along the collar 2 is provided at the connection between the outer peripheral surface and the lower end surface of the collar 2. When the bottom of the collar 2 is pressed against the upper surface of the second connector 300, the annular boss 21 will also be pressed against the upper surface of the second connector 300. This can increase the contact area between the collar 2 and the second connector 300, ensuring that the collar 2 applies a sufficiently large clamping force to the second connector 300.

[0054] This utility model also provides a fan blade, which includes a ring groove rivet. Since the ring groove rivet adopts the technical solution of the above embodiment, it has the beneficial effects brought about by the technical solution of the above embodiment.

[0055] Please see Figures 1 to 3 In some embodiments, the fan blade further includes a first connector 200 and a second connector 300. The first connector 200 is provided with a threaded hole 210. The second connector 300 is disposed on the side of the first connector 200 near the threaded hole 210. The second connector 300 is provided with a through hole 310, and the end of the through hole 310 near the first connector 200 is connected to the threaded hole 210. The threaded connection portion 11 of the rivet body 1 of the grooved rivet 100 is threadedly connected to the threaded hole 210. The riveting locking portion 12 of the grooved rivet 100 is inserted into the through hole 310 at the end near the threaded connection portion 11. The collar 2 of the grooved rivet 100 is riveted to the riveting locking portion 12 and abuts against the side of the second connector 300 away from the first connector 200.

[0056] Specifically, the annular groove rivet 100 can be pre-embedded in the composite material of the wind turbine blade. After the composite material has cured and formed, it can be pre-tightened to other structures, providing normal pre-tightening force, greatly increasing the cohesion of the interface layer, and preventing debonding. For example, the first connector 200 can be a metal material layer such as a threaded sleeve, and the second connector 300 can be a glass fiber layer, etc.

[0057] This utility model also provides a wind turbine generator, which includes wind turbine blades. Since the wind turbine blades adopt the technical solutions of the above embodiments, they have the beneficial effects brought about by the technical solutions of the above embodiments.

[0058] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A grooved rivet, characterized in that, For connecting the first connector and the second connector, the annular groove rivet includes: The rivet body includes a threaded connection part, a riveting locking part, a neck and a tail connected in sequence. The radial dimension of the riveting locking part and the radial dimension of the tail are both larger than the radial dimension of the neck. The threaded connection part is used to pass through the second connector and then be threadedly connected to the first connector. A collar is used to be fitted onto the rivet body and riveted to the riveting locking part, so as to abut against the side of the second connector away from the first connector.

2. The ring groove rivet according to claim 1, characterized in that, The radial dimension of the riveting locking part passing through one end of the second connector is larger than the radial dimension of the threaded connection part, so as to form an annular limiting surface facing away from the broken neck between the riveting locking part and the threaded connection part. The annular limiting surface is used to abut against the side of the first connector near the second connector.

3. The ring groove rivet according to claim 1, characterized in that, The riveting locking part includes a riveting section for riveting with the collar, and the peripheral side of the riveting section is provided with a plurality of first annular grooves arranged along the axial direction of the rivet body.

4. The ring groove rivet according to claim 1, characterized in that, The radial dimension of the broken neck gradually increases from the end near the riveting locking part to the end near the broken tail part.

5. The ring groove rivet according to claim 1, characterized in that, An inner groove is provided on the end face of the broken tail portion away from the broken neck portion, so that the threaded connection portion can be screwed into the first connector through the inner groove; and / or, The tail section includes a connecting segment for connection with the tensioner, and the peripheral side of the connecting segment is provided with an anti-slip structure.

6. The ring groove rivet according to claim 5, characterized in that, The groove is either a straight groove or a cross groove.

7. The ring groove rivet according to claim 5, characterized in that, The anti-slip structure includes a plurality of second annular grooves arranged along the axial direction of the rivet body.

8. The ring groove rivet according to claim 1, characterized in that, An annular boss is provided on the outer peripheral side of the collar near the threaded connection portion. The annular boss is used to abut against the side of the second connector away from the first connector.

9. A wind turbine blade, characterized in that, include: A first connector, wherein a threaded hole is provided on the first connector; The second connector is disposed on the side of the first connector near the threaded hole, and a through hole is provided on the second connector, the end of the through hole near the first connector communicating with the threaded hole; A grooved rivet, wherein the grooved rivet is as described in any one of claims 1-8, wherein the threaded connection portion of the rivet body of the grooved rivet is threadedly connected to the threaded hole, and one end of the rivet locking portion of the grooved rivet near the threaded connection portion is inserted into the through hole, and the collar of the grooved rivet is riveted to the rivet locking portion and abuts against the side of the second connecting member away from the first connecting member.

10. A wind turbine generator, characterized in that, Including the wind turbine blades as described in claim 9.

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