Corrosion-resistant bidirectional locking fastening bolt for offshore wind turbine

Abstract

The invention relates to the technical field of bolts, and discloses a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine, the corrosion-resistant bidirectional locking fastening bolt comprises a bolt rod, the bolt rod is provided with a first thread, a bidirectional thread and a smooth surface, the smooth surface is located between the first thread and the bidirectional thread, one section of the bidirectional thread is a forward thread, and the other section of the bidirectional thread is a reverse thread. According to the corrosion-resistant two-way locking fastening bolt for the offshore wind turbine, reverse positioning and locking of the whole bolt can be achieved through the arranged locking assembly, even if the wind turbine moves or vibrates for a long time, self-locking can be achieved through the installed and fixed bolt and a special nut of the structure, two-way locking is achieved, and the service life of the wind turbine is prolonged. Due to the fact that the two-way threads are formed, when a special nut is vibrated to generate self-rotation to a certain degree, the traditional nut can achieve reverse jacking at the moment, it is guaranteed that the whole connecting piece is stable and not loosened, and therefore the overall connecting stability of the draught fan is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bolts, and specifically to a corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine. Background Art

[0002] Power generation methods such as thermal power and nuclear power are restricted by issues such as oil resources and nuclear safety. As a new type of energy, wind energy has received increasing attention. The wind resources at sea are greater than those on land. Therefore, many countries in the world have established large-scale wind power plants at sea. China has also gradually entered the actual application stage of offshore wind power and established offshore wind power plants. However, the installation accuracy of the wind turbine unit determines the power generation efficiency of the wind power.

[0003] During the installation process of offshore wind turbines, bolt groups are widely used, such as between the wind turbine blades and the base, and the upper and lower parts of the tower barrel. Due to the large mass of the wind turbine components and the complex offshore working conditions, and the high-precision requirements for the installation of bolt groups, and because the wind turbine is constantly moving at sea, when using traditional bolts for installation, with long-term operation, the vibration generated by strong winds will cause a certain degree of oscillation to the bolts. And traditional bolts do not have a self-locking function, resulting in the vibration generated during the operation of the wind turbine easily causing the tightened bolts to become loose. With long-term vibration loosening, it will lead to instability in the connection part of the wind turbine, thus resulting in subsequent problems of increased failure rate of the wind turbine damage. Therefore, a corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine, which solves the problem that the fastening bolts used in existing offshore wind turbines are prone to looseness under long-term vibration, resulting in subsequent damage to the use of the wind turbine. In severe cases, it will directly cause the direct damage of the offshore wind turbine.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine, including a bolt rod, on which there are thread one, two-way thread and a smooth surface. The smooth surface is located between thread one and the two-way thread. One section of the two-way thread is a right-handed thread and one section is a left-handed thread, and a locking component is arranged on the two-way thread; a top position component is also arranged inside the bolt rod; the locking component is used to control the locking of the bolt rod; the top position component is used to limit the oscillation and displacement of the bolt rod after fastening.

[0008] Preferably, the locking assembly includes a lock sleeve and a mating sleeve. The lock sleeve is threadedly connected to the right-handed thread on the double-thread, and the mating sleeve is threadedly connected to Thread 1.

[0009] Preferably, a pressing piece is slidably connected to the lock sleeve. A pressing pin is fixedly connected to the side surface of the pressing piece. A rotating piece is rotatably connected to the lock sleeve. An inclined groove is formed in the rotating piece. The pressing pin is slidably connected in the inclined groove. A socket groove is formed in the side surface of the mating sleeve, and a plurality of ratchet grooves are formed in the inner wall of the socket groove.

[0010] Preferably, a sliding plate is fixedly connected to the rotating piece. An arc-shaped rod is slidably connected to the sliding plate. The arc-shaped rod is fixed in the lock sleeve. A compression spring is sleeved on the surface of the arc-shaped rod. One end of the compression spring is connected to the sliding plate, and the other end of the compression spring is connected to the lock sleeve.

[0011] Preferably, an activity groove is formed in the interior of the lock sleeve, and the pressing piece is slidably connected to the interior of the activity groove.

[0012] Preferably, a plurality of pressing pieces and pressing pins are provided, and the plurality of pressing pieces and pressing pins are circularly arranged in an array with the center of the lock sleeve as the axis of symmetry.

[0013] Preferably, the positioning assembly includes a center rod. The center rod is threadedly connected to the interior of the bolt rod. A ring is installed at one end of the center rod. A rotating sleeve is rotatably connected to the other end of the center rod. An upper connecting rod is rotatably connected to the rotating sleeve. A flat plate is rotatably connected to the upper connecting rod, and a plurality of insertion posts are installed on the flat plate.

[0014] Preferably, two flat plates are provided, and the two flat plates are connected by a compression spring. One end of the upper connecting rod is rotatably connected to a lower connecting rod, and the bottom of the lower connecting rod is connected to the flat plate below the bolt rod.

[0015] Preferably, a chute is formed in the bolt rod, and the insertion post is slidably connected to the interior of the chute through a key slot.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine, having the following beneficial effects:

[0018] 1. The corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine can achieve reverse positioning and locking of the entire bolt through the provided locking assembly. Even after the wind turbine has undergone long-term movement or vibration, the installed and fixed bolt and the "special nut" of this structure can achieve self-locking, and it is bidirectional locking because it presents bidirectional threads. When the "special nut" undergoes self-rotation to a certain extent due to vibration, the traditional nut will achieve reverse top-tightening, ensuring the stability of the entire connector without loosening, thereby improving the overall connection stability of the wind turbine.

[0019] 2. The corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine can provide a vertical "special nut" clamping structure through the provided top-positioning assembly, thereby limiting the self-rotation of the "special nut" due to vibration, providing double insurance for connection stability again, and further improving the stability of the wind turbine during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic diagram of the overall structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0021] Figure 2 FIG. is a schematic diagram of the bolt rod structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0022] Figure 3 FIG. is a schematic diagram of the cross-sectional structure of the bolt rod of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0023] Figure 4 FIG. is a schematic diagram of the locking assembly structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0024] Figure 5 FIG. is a schematic diagram of the mating sleeve structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0025] Figure 6 FIG. is a schematic diagram of the lock sleeve structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0026] Figure 7 FIG. is a schematic diagram of the rotating piece structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0027] Figure 8 FIG. is a schematic diagram of the pressing piece structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention;

[0028] Figure 9 FIG. is a schematic diagram of the top-positioning assembly structure of a corrosion-resistant bidirectional locking fastening bolt for an offshore wind turbine proposed by the present invention.

[0029] In the figure: 1. Bolt rod; 101. Chute; 2. First thread; 3. Double - thread; 4. Smooth surface; 5. Locking assembly; 501. Lock sleeve; 502. Pressing piece; 503. Rotating piece; 504. Arc rod; 505. Compression spring; 506. Slide plate; 507. Pressing pin; 508. Inclined groove; 509. Movable groove; 510. Fitting sleeve; 511. Sleeve groove; 512. Ratchet groove; 6. Position - topping assembly; 601. Central rod; 602. Rotating sleeve; 603. Flat plate; 604. Inserting post; 605. Upper connecting rod; 606. Lower connecting rod; 607. Extrusion spring. Specific implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-9 , a corrosion - resistant double - lock fastening bolt for an offshore wind turbine, including a bolt rod 1, on which there are a first thread 2, a double - thread 3 and a smooth surface 4. The smooth surface 4 is located between the first thread 2 and the double - thread 3. One section of the double - thread 3 is a right - hand thread and the other section is a left - hand thread, and a locking assembly 5 is arranged on the double - thread 3; there is also a position - topping assembly 6 inside the bolt rod 1; the locking assembly 5 is used to control the locking of the bolt rod 1; the position - topping assembly 6 is used to limit the shock - induced displacement of the bolt rod 1 after fastening.

[0032] In this embodiment, the locking assembly 5 includes a lock sleeve 501 and a fitting sleeve 510. The lock sleeve 501 is thread - connected to the right - hand thread on the double - thread 3, and the fitting sleeve 510 is thread - connected to the first thread 2. By the right - hand rotation and left - hand rotation of the double - thread 3, the connection and positioning of the two "nuts" are realized, so that the entire screw rod will not easily rotate self - rotatably to a certain extent.

[0033] Furthermore, a pressing plate 502 is slidably connected to the lock sleeve 501, a pressing pin 507 is fixedly connected to the side of the pressing plate 502, a rotating plate 503 is rotatably connected to the lock sleeve 501, an inclined groove 508 is provided on the rotating plate 503, and the pressing pin 507 is slidably connected in the inclined groove 508, a sleeve groove 511 is provided on the side of the matching sleeve 510, and a plurality of ratchet grooves 512 are provided on the inner wall of the sleeve groove 511. A sliding plate 506 is fixedly connected to the rotating plate 503, an arc rod 504 is slidably connected to the sliding plate 506, the arc rod 504 is fixed in the lock sleeve 501, and a compression spring 505 is sleeved on the surface of the arc rod 504, one end of the compression spring 505 is connected to the sliding plate 506, and the other end of the compression spring 505 is connected to the lock sleeve 501. After the wrench is taken out, the return force of the multiple compressed springs 505 will push the slide plate 506 to slide, and then drive the rotating plate 503 to reverse return and rotate. At this time, due to the inclined groove 508, the pressing pin 507 will be moved up and reset, and then control the opening and extension of the pressing plate 502, and the pressing plate 502 will be inserted into the ratchet groove 512 to achieve reverse tooth engagement, so the matching sleeve 510 and the locking sleeve 501 form a whole, and then abut against the matching sleeve 510 and the connecting parts of the offshore wind turbine to achieve connection and fixation. When the wind turbine is running or subjected to vibration, it will be difficult to produce self-rotation under the reverse tooth engagement conditions of the ratchet groove 512 and multiple pressing plates 502. Unless there is a slipping thread, the "special nut" formed by the entire matching sleeve 510 and the locking sleeve 501 will be connected and fixed using two threads with different rotation directions, thereby ensuring the stability of the connecting parts of the wind turbine.

[0034] Furthermore, a movable groove 509 is provided inside the lock sleeve 501, and the pressing piece 502 is slidably connected inside the movable groove 509. Multiple pressing pieces 502 and pressing pins 507 are provided, and the multiple pressing pieces 502 and pressing pins 507 are distributed in a circular array with the center of the lock sleeve 501 as the symmetry axis. The movable sleeve 509 is provided to provide a certain sliding space for the sliding of the pressing piece 502, and the multiple pressing pieces 502 are provided so that the self-rotation generates force, which is evenly distributed and acts on the multiple pressing pieces 502, thereby improving the service life and stability time of the entire bolt.

[0035] In addition, the top component 6 includes a central rod 601. The central rod 601 is threadedly connected inside the bolt rod 1. A ring is installed at one end of the central rod 601. The other end of the central rod 601 is rotatably connected to a rotating sleeve 602. An upper connecting rod 605 is rotatably connected to the rotating sleeve 602. A flat plate 603 is rotatably connected to the upper connecting rod 605. A plurality of insertion posts 604 are installed on the flat plate 603. By rotating the internal central rod 601, through threaded connection, the rotating sleeve 602 is driven to move forward a small distance. Then, through the support of the upper connecting rod 605 and the lower connecting rod 606, it spreads open, thereby driving the insertion posts 604 on the two flat plates 603 to be inserted into the inner wall threads of the lock sleeve and the mating sleeve 510, and directly performing vertical clamping by using the pitch of the internal thread, so as to form a certain degree of self-locking and ensure that the lock sleeve 501 and the mating sleeve 510 will not vibrate and rotate by themselves.

[0036] In addition, there are two flat plates 603, and the two flat plates 603 are connected by a compression spring 607. One end of the upper connecting rod 605 is rotatably connected to a lower connecting rod 606. The bottom of the lower connecting rod 606 is connected to the flat plate 603 below the bolt rod 1. By providing the compression spring 607, the contraction of the two flat plates 603 can be controlled in the free state to enter the inside of the bolt rod 1 to achieve yielding, so that the lock sleeve 501 and the mating sleeve 510 can be screwed into the inside of the double-thread 3 in the initial state. A chute 101 is formed on the bolt rod 1. The insertion post 604 is slidably connected to the inside of the chute 101 through a keyway. By providing the chute 101, the insertion post 604 can be restricted to only slide up and down, avoiding the situation of angular tilt and dislocation.

[0037] Working principle: first, when the entire bolt is in use, the bolt rod 1 needs to be inserted into the hole of the fan to be fixed to form a series connection with the connecting piece, and then the "special nut" is threadedly tightened. The first step is to rotate the matching sleeve 510 from the two-way thread 3, screw it into the surface of the bolt rod 1, and be on the positive rotation surface of the two-way thread 3, so that it can be abutted and locked with the connecting piece of the fan, and then the locking sleeve 501 is screwed from the surface on the two-way thread 3 into the surface of the bolt rod 1, and abutted against the matching sleeve 510. The rotation of the locking sleeve 501 must be done by a tool, such as a wrench. When the wrench is inserted into the tightening position of the locking sleeve 501, it will be inserted from the inclined surface of the pressing plate 502, thereby squeezing the pressing plate 502 in the symmetrical position, causing it to shrink into the interior of the locking sleeve 501, and then the sliding of the pressing plate 502 will drive the pressing pin 507 to be pressed down, and then slide through the groove between the inclined grooves 508. The entire rotating piece 503 is driven to rotate at a certain angle, and the rotation of the entire rotating piece 503 will drive the remaining multiple pressing pins 507 to passively contract, and then drive the multiple pressing pieces 502 to contract. When the surface of the locking sleeve 501 is screwed into the interior of the sleeve groove 511, it cannot be tightened due to the abutment relationship. At this time, the wrench is loosened, that is, after the wrench is taken out, the sliding plate 506 will be pushed to slide under the restoring elastic force of multiple compressed springs 505, and then the rotating piece 503 will be reversed and reset. At this time, due to the inclined groove 508, the pressing pin 507 will be moved up and reset, and then the pressing piece 502 will be controlled to open and extend, and the pressing piece 502 will be inserted into the ratchet groove 512 to achieve reverse tooth engagement, so the matching sleeve 510 and the locking sleeve 501 form a whole, and then abut against the matching sleeve 510 and the connecting piece of the offshore wind turbine to achieve connection and fixation. When the fan is running or subjected to vibration, it will be difficult to produce self-rotation under the reverse tooth clamping conditions of the ratchet groove 512 and the multiple pressing plates 502. Unless there is a slipping thread, the "special nut" formed by the entire matching sleeve 510 and the locking sleeve 501 will be connected and fixed by two threads with different rotation directions, thereby ensuring the stability of the fan's connecting parts. At the same time, a top position component is also set. When the overall installation is completed, the internal center rod 601 can be rotated again. After the threaded connection, the rotating sleeve 602 is driven to move forward a short distance, and then opened through the support of the upper connecting rod 605 and the lower connecting rod 606, thereby driving the plugs 604 on the two flat plates 603 to be inserted into the inner wall threads of the locking sleeve and the matching sleeve 510, and the pitch of the internal thread is directly used to clamp them vertically, so that a certain degree of self-locking can be formed, ensuring that the locking sleeve 501 and the matching sleeve 510 will not produce vibration and self-rotation. The connection stability of the entire bolt is further improved.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine, characterized in that, Comprising, A bolt rod (1), on which a first thread (2), a double - thread (3) and a smooth surface (4) are provided. The smooth surface (4) is located between the first thread (2) and the double - thread (3). One section of the double - thread (3) is a right - hand thread and the other section is a left - hand thread, and a locking component (5) is provided on the double - thread (3); A top - positioning component (6) is further provided inside the bolt rod (1); The locking component (5) is used to control the locking of the bolt rod (1); The top - positioning component (6) is used to limit the shock - induced displacement of the bolt rod (1) after fastening.

2. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 1, characterized in that: The locking component (5) includes a lock sleeve (501) and a mating sleeve (510). The lock sleeve (501) is thread - connected to the right - hand thread on the double - thread (3), and the mating sleeve (510) is thread - connected to the first thread (2).

3. The corrosion-resistant bidirectional locking and fastening bolt for an offshore wind turbine according to claim 2, characterized in that: A pressing piece (502) is slidably connected to the lock sleeve (501). A pressing pin (507) is fixedly connected to the side of the pressing piece (502). A rotating piece (503) is rotatably connected to the lock sleeve (501). An inclined slot (508) is formed on the rotating piece (503). The pressing pin (507) is slidably connected in the inclined slot (508). A sleeve slot (511) is formed on the side of the mating sleeve (510), and a plurality of ratchet slots (512) are formed on the inner wall of the sleeve slot (511).

4. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 3, characterized in that: A sliding plate (506) is fixedly connected to the rotating piece (503). An arc - shaped rod (504) is slidably connected to the sliding plate (506). The arc - shaped rod (504) is fixed inside the lock sleeve (501). A compression spring (505) is sleeved on the surface of the arc - shaped rod (504). One end of the compression spring (505) is connected to the sliding plate (506), and the other end of the compression spring (505) is connected to the lock sleeve (501).

5. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 4, characterized in that: An activity slot (509) is formed inside the lock sleeve (501), and the pressing piece (502) is slidably connected inside the activity slot (509).

6. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 3, wherein: A plurality of pressing pieces (502) and pressing pins (507) are provided, and the plurality of pressing pieces (502) and pressing pins (507) are circularly arrayed with the center of the lock sleeve (501) as the axis of symmetry.

7. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 1, characterized in that: The top - positioning component (6) includes a center rod (601). The center rod (601) is thread - connected inside the bolt rod (1). A ring is installed at one end of the center rod (601). A rotating sleeve (602) is rotatably connected to the other end of the center rod (601). An upper connecting rod (605) is rotatably connected to the rotating sleeve (602). A flat plate (603) is rotatably connected to the upper connecting rod (605), and a plurality of insertion posts (604) are installed on the flat plate (603).

8. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 7, wherein: Two flat plates (603) are provided, and the two flat plates (603) are connected by a compression spring (607). One end of the upper connecting rod (605) is rotatably connected to a lower connecting rod (606), and the bottom of the lower connecting rod (606) is connected to the flat plate (603) below the bolt rod (1).

9. The corrosion-resistant two-way locking and fastening bolt for an offshore wind turbine according to claim 8, wherein: A chute (101) is formed on the bolt rod (1), and the insertion post (604) is slidably connected to the inside of the chute (101) through a keyway.

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