A type of anti-loosening lock nut for wind turbines

Abstract

This application relates to the field of nut processing design, and provides an anti-loosening locking nut for wind turbines, including a nut body and multiple sliding locking blocks. The inner circumferential surface of the nut body is provided with multiple sliding chambers at intervals, each sliding chamber including two symmetrically arranged and interconnected sliding grooves. The number of sliding locking blocks is matched with the number of sliding grooves, with each sliding locking block correspondingly sliding and installed inside its respective sliding groove. The inner surface of each sliding locking block is provided with threaded tooth segments, and the inner circumferential surface of the nut body is provided with threaded tooth grooves, which are normally aligned with each threaded tooth segment. A hook structure is provided between two sliding locking blocks located in the same sliding chamber to ensure that both sliding locking blocks are stably positioned within the sliding groove. A repulsion structure is also provided between two adjacent sliding locking blocks to force them away from each other. Based on this, excellent anti-loosening effect is achieved after locking, ensuring a stable connection between rotating components.

Description

Technical Field

[0001] This application relates to the field of nut processing and design, and in particular to an anti-loosening lock nut for wind turbines. Background Technology

[0002] A wind turbine mainly consists of components such as a wind rotor, generator, deflector / tail fin, tower, speed limiting safety mechanism, and energy storage device. During operation, the wind rotor rotates under the action of wind, converting the kinetic energy of the wind into the mechanical energy of the wind rotor shaft. The generator rotates under the drive of the wind rotor shaft to generate electricity, thereby outputting alternating current to power equipment.

[0003] Nuts used on wind turbines are indispensable components of wind power systems, playing a crucial role in ensuring stable operation and efficient power generation. Especially at the connections of rotating components, these nuts are constantly subjected to vibration and impact from the operation of these components, making them prone to loosening or connection failure. This can lead to loosening or detachment of the connecting parts, affecting the overall stability and safe operation of the generator set. Therefore, the locking nuts on wind turbines require higher standards for their anti-loosening performance. Summary of the Invention

[0004] Based on this, this application provides an anti-loosening locking nut for wind turbines, which has excellent anti-loosening effect after being locked, so as to ensure a stable connection between various rotating parts.

[0005] The anti-loosening lock nut for wind turbines provided in this application adopts the following technical solution:

[0006] A locking nut for wind turbines includes a nut body and multiple sliding locking blocks. The inner circumferential surface of the nut body is provided with multiple sliding chambers at intervals. Each sliding chamber includes two symmetrically arranged and interconnected sliding grooves. The end of each sliding groove, away from the other sliding groove, extends through the side end face of the nut body. The distance between the sliding groove and the central axis of the nut body gradually decreases from the end of the sliding groove closer to the adjacent side end face of the nut body to the other end.

[0007] The number of sliding lock blocks and sliding groove segments are matched, and each sliding lock block is slidably installed inside each sliding groove segment. The inner side of the sliding lock block is provided with threaded tooth segments, and the inner circumferential surface of the nut body is provided with threaded tooth grooves. The threaded tooth grooves and each threaded tooth segment are normally aligned with each other to form an internal threaded groove for external bolt mating connection.

[0008] A hook structure is provided between the two sliding lock blocks located in the same sliding chamber to ensure that both sliding lock blocks are stably placed in the sliding groove section; a repulsion structure is also provided between the two adjacent sliding lock blocks to force the two sliding lock blocks to move away from each other.

[0009] By adopting the above technical solution, two sliding locking blocks are slidably installed in each sliding chamber. Each sliding locking block is kept hooked and engaged with the others under the action of the hooking structure. Furthermore, by utilizing the inclined arrangement of the two sliding groove sections, the occurrence of sliding locking blocks accidentally disengaging from the sliding chamber can be reduced, thereby ensuring the normal use of the anti-loosening locking nut. Under normal conditions, the threaded grooves of the nut body and the threaded segments of each sliding locking block are aligned to form an internal threaded groove, allowing external bolts to pass through and connect threadedly. Furthermore, the repulsion structure between each pair of adjacent sliding locking blocks generates a force that forces the two adjacent blocks to move away from each other. At this point, the threaded segments tend to misalign with the internal threaded groove. When the equipment vibrates, the vibration frequencies of the nut body and each sliding locking block are different, reducing the possibility of accidental loosening of the nut body, thus providing the first layer of anti-loosening effect. Additionally, because the forces exerted on the bolts by the two adjacent sliding locking blocks are in opposite directions, they can better counteract the reciprocating vibration of the equipment, providing the second layer of anti-loosening effect. Finally, the inclined arrangement of the two sliding groove segments causes each pair of adjacent sliding locking blocks to tend to move inwards when they are normally far apart, allowing the threaded segments to grip the bolt, providing the third layer of anti-loosening effect. Therefore, the triple anti-loosening effect enables the anti-loosening locking nut to have excellent anti-loosening effect, greatly reducing the possibility of accidental loosening of the nut or connection failure, thus ensuring a stable connection between various rotating parts.

[0010] Optionally, the hook structure includes two sets of movable mechanisms, which are respectively located on opposite sides of two adjacent sliding locking blocks;

[0011] The movable mechanism includes a fixed support fixed to the sliding lock block and a rotating hook seat rotatably mounted on the fixed support. A reset component is provided between the rotating hook seat and the sliding lock block to keep the rotating hook seat in contact with the sliding lock block in a normal state.

[0012] Each rotating hook seat has an inclined guide surface on the side away from the sliding lock block. When two sliding lock blocks are installed together in the sliding chamber, the inclined guide surfaces of the two sliding lock blocks abut against each other to force the two rotating hook seats to rotate in opposite directions.

[0013] By adopting the above technical solution, when assembling the sliding lock blocks, by simultaneously inserting two sliding lock blocks into the two sliding groove sections of the same sliding chamber, the rotating hook seats of the two sets of moving mechanisms approach each other, and finally the two inclined guide surfaces can abut against each other. The abutment of the two inclined guide surfaces can force the two rotating hook seats to rotate in opposite directions. After the rotating hook seats rotate a certain distance, the hook parts of the two rotating hook seats are misaligned. Under the reset action of the reset component, the two rotating hook seats can be automatically reset. At this time, the two hook parts can hook and cooperate with each other, thereby keeping the two sliding lock blocks located in the same sliding chamber hooked and cooperating, reducing the occurrence of the sliding lock blocks accidentally disengaging from the sliding chamber.

[0014] Optionally, the sliding lock block is made of carbon steel, and the reset component is a magnet block embedded on the side of the rotating hook seat, with the magnet block located on the side of the rotating hook seat near the sliding lock block.

[0015] By adopting the above technical solution, the sliding lock block made of carbon steel has magnetic conductivity. By embedding the magnet block on the side of the rotating hook seat near the sliding lock block, since the rotation angle of the rotating hook seat is a small angle, the magnetic attraction between the magnet block and the sliding lock block can automatically force the rotating hook seat to return to the initial position after the rotating hook seat rotates, so as to maintain the hook engagement between the two sliding lock blocks.

[0016] Optionally, the outer side of the nut body is provided with an unlocking groove that communicates with the sliding chamber, and the unlocking groove is directly connected to the two sliding groove sections; an unlocking component is matched and installed inside the unlocking groove, and a spring is provided between the unlocking component and the inner wall of the unlocking groove. The spring is used to force the unlocking component to move normally away from the sliding chamber.

[0017] Among the two rotating hook seats located in the same hook structure, the rotating hook seat closer to the central axis of the nut body is designated as the inner rotating hook seat, and the inner rotating hook seat is partially exposed to the other rotating hook seat; the side of the unlocking member near the sliding groove section is provided with a push column. When the unlocking member moves inward, the push column abuts against the inner rotating hook seat and forces the inner rotating hook seat to rotate in the direction closer to the central axis of the nut body.

[0018] By adopting the above technical solution, when the sliding lock block is not installed in the correct sliding groove section, or when the sliding lock block needs to be disassembled and maintained after the nut body is disassembled, the unlocking member is forced to move inward from the outside of the nut body. The push column of the unlocking member can abut against the inner rotating hook seat and move it towards the central axis of the nut body. Finally, the inner rotating hook seat can disengage from another adjacent rotating hook seat. Then, under the repulsive force of the repulsion structure, the two sliding lock blocks can automatically move outward and disengage from the sliding groove section, which is beneficial for the disassembly and maintenance of the sliding lock block.

[0019] Optionally, the repulsion structure includes an elastic bladder bonded to the side of the sliding lock block near the adjacent sliding lock block and a magnetorheological fluid filled inside the elastic bladder. When the two sliding lock blocks are installed together in the sliding chamber, the elastic bladder is in a state of compressive deformation.

[0020] By adopting the above technical solution, when two sliding locking blocks are inserted into two sliding grooves in a sliding chamber at the same time, each sliding locking block will squeeze the elastic bladder of the corresponding sliding locking block, thereby causing the elastic bladder to deform under pressure. When the wind turbine is running, the anti-loosening locking nut is in a magnetic field environment. At this time, the magnetorheological fluid inside the elastic bladder gradually exhibits the characteristics of high viscosity and low fluidity, which can always exert a force on the two sliding locking blocks and force the two sliding locking blocks to move away from each other.

[0021] Optionally, the two opposite sides of the sliding lock block are provided with limiting parts, and the limiting parts are located on the side of the sliding lock block away from the threaded tooth section; the two opposite side walls of the sliding groove section are provided with limiting grooves, and when the sliding lock block is installed in the sliding groove section, the limiting parts match and enter the limiting groove.

[0022] By adopting the above technical solution, the sliding lock block can be reduced from moving into the nut body and disengaging from the limiting groove section after it is inserted into the sliding groove section through the cooperation between the limiting part and the limiting groove. This ensures that the sliding lock block is stably placed inside the sliding groove section.

[0023] Optionally, the outer surface of the nut body is provided with a connecting hole that communicates with the sliding groove section, and a lock core is fitted through the connecting hole. The end of the lock core is provided with a cone head. The side of the sliding lock block away from the central axis of the nut body is provided with a positioning cone groove. The depth of the positioning cone groove is greater than the axial length of the cone head, and the taper of the cone head is adapted to the taper of the inner wall of the positioning cone groove. When the cone head and the positioning cone groove are engaged for positioning, the threaded teeth of the sliding lock block are aligned with the threaded teeth of the nut body.

[0024] By adopting the above technical solution, when two sliding locking blocks are inserted into the two sliding grooves in a sliding cavity at the same time, the elastic force generated by the repulsion structure acts on the two sliding locking blocks respectively, forcing the two sliding locking blocks to move in opposite directions. At this time, the two rotating hook seats can maintain local contact and limit. Then, the lock cylinder is inserted into the connecting hole, forcing the lock cylinder to move inward. The cone at the end of the lock cylinder can abut against the inner wall of the positioning cone groove and continuously fine-tune the position of the sliding locking block. Finally, the threaded tooth segment and the threaded tooth groove can be kept aligned under normal conditions, so as to facilitate the normal use of the anti-loosening locking nut.

[0025] Optionally, a thin protective plate is provided around the outer circumference of the nut body, covering each connecting hole in the circumferential direction, and each lock cylinder post abuts against the thin protective plate.

[0026] By adopting the above technical solution, and by setting a thin protective plate to cover the outside of each connecting hole, the occurrence of the lock cylinder moving outward and disengaging from the connecting hole can be reduced. Furthermore, the end of the lock cylinder away from the central axis of the nut body is normally against the thin protective plate, which helps to keep the thread tooth segment and thread tooth groove aligned under normal conditions, thereby facilitating the normal use of the anti-loosening lock nut.

[0027] Optionally, the anti-loosening locking nut also includes two corrosion-resistant washers, which are respectively disposed on the two end faces of the nut body, and each corrosion-resistant washer covers each sliding groove segment on the end face of the nut body; the two adjacent corrosion-resistant washers are detachably connected by a plug-in structure.

[0028] By adopting the above technical solution, two corrosion-resistant gaskets are respectively placed on the two end faces of the nut body. The corrosion-resistant gaskets cover each sliding groove section of the corresponding end face, which can reduce the occurrence of water vapor entering the gap between the sliding locking block and the inner wall of the sliding groove section under harsh weather conditions. This makes the anti-loosening locking nut have good anti-rust performance and extend its service life.

[0029] Optionally, the plug-in structure includes a plug-in plate disposed on one of the corrosion-resistant gaskets and a plug-in interface opened on the other corrosion-resistant gasket, and the plug-in plate and the plug-in interface are plugged and adapted together; the side of the plug-in plate away from the corrosion-resistant gasket is provided with a hook portion, and in the assembled state, the hook portion matches and abuts against the side of the other plug-in plate, and the plug-in plate abuts against the thin protective sheet.

[0030] By adopting the above technical solution, the two corrosion-resistant gaskets can be firmly connected to the two end faces of the nut body through the plug-in plate and plug interface. Furthermore, by making the plug-in plate abut against the thin protective plate, the force generated by the repulsion structure on the sliding locking block forces the sliding locking block to move outward. The inner wall of the positioning cone groove will abut against the lock cylinder post, causing the lock cylinder post to tend to move outward. At this time, the lock cylinder post can force the thin protective plate to move outward and generate a force on the plug-in plate. After the plug-in plate deforms outward, it has the tendency to pull the two corrosion-resistant gaskets closer to each other, which can make the corrosion-resistant gaskets further press against the nut body, further reducing the possibility of moisture entering the area between the sliding locking block and the inner wall of the sliding groove section, thereby giving the anti-loosening locking nut a more excellent anti-rust performance.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. By setting a repulsion structure between every two adjacent sliding locking blocks to force the two adjacent sliding locking blocks to move away from each other, the threaded tooth segment has a tendency to be misaligned with the internal thread groove. When the equipment vibrates, the vibration frequency between the nut body and each sliding locking block is different, which can reduce the situation of the nut body loosening unexpectedly and play the first-level anti-loosening effect.

[0033] 2. By symmetrically setting two adjacent sliding locking blocks and the sliding groove sections they belong to, the forces exerted by the two sliding locking blocks under the action of the repulsion structure are in opposite directions, which can effectively counteract the reciprocating vibration of the equipment and has a second layer of anti-loosening effect;

[0034] 3. By tilting the sliding groove section, the two sliding locking blocks tend to move inward when they are normally far apart. The threaded tooth section can tighten the bolt, providing a third layer of anti-loosening effect. Under the triple anti-loosening effect, the anti-loosening locking nut has an excellent anti-loosening effect, ensuring a stable connection between various rotating parts. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0036] Figure 2 This is a half-sectional schematic diagram of the nut body in this embodiment;

[0037] Figure 3 This is a half-sectional schematic diagram of the overall structure in this embodiment;

[0038] Figure 4 This is a schematic diagram of the structure of two sliding locking blocks in the same sliding cavity in this embodiment;

[0039] Figure 5 This is a partial cross-sectional view of the two sliding locking blocks in this embodiment, mainly showing the specific structure of the hook connection structure;

[0040] Figure 6 yes Figure 3 Enlarged view of point A in the middle;

[0041] Figure 7 yes Figure 3 Enlarged view of point B in the middle.

[0042] Explanation of reference numerals in the attached drawings: 1. Nut body; 11. Sliding chamber; 111. Sliding groove segment; 112. Limiting groove; 12. Threaded tooth groove; 13. Unlocking groove; 14. Connecting hole; 2. Sliding locking block; 21. Threaded tooth segment; 22. Limiting part; 23. Positioning cone groove; 3. Hook structure; 31. Fixed support; 32. Rotating hook seat; 321. Rounded corner; 322. Hook part; 323. Inclined guide surface; 33. Magnet block; 34. Inner rotating hook seat; 35. Outer rotating hook seat; 4. Unlocking component; 41. Pushing column; 42. Insertion column; 43. Spring; 5. Locking core column; 51. Cone head; 6. Thin protective plate; 7. Repulsion structure; 71. Elastic bladder; 8. Corrosion-resistant gasket; 9. Insertion structure; 91. Insertion plate; 911. Hook part; 92. Insertion interface. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0044] This application discloses an anti-loosening lock nut for wind turbine generators.

[0045] Reference Figure 1 A locking nut for a wind turbine includes a nut body 1, a sliding locking block 2, and a corrosion-resistant washer 8. The nut body 1 has a central opening that extends through both end faces of the nut body 1, and the inner circumferential wall of the opening is provided with threaded grooves 12. (Refer to...) Figure 2 The inner circumferential surface of the nut body 1 is provided with multiple sliding chambers 11, and all sliding chambers 11 are equidistantly arranged along the central axis of the nut body 1. It should be noted that the nut body 1 in this embodiment is a hexagonal nut structure, and the number of sliding chambers 11 is set to six groups, with each sliding chamber 11 corresponding to each side of the nut body 1.

[0046] The sliding chamber 11 includes two symmetrically arranged and interconnected sliding groove sections 111. The end of each sliding groove section 111 furthest from the other sliding groove section 111 extends through the side end face of the nut body 1. The sliding groove sections 111 are generally inclined, and the distance between each sliding groove section 111 and the central axis of the nut body 1 gradually decreases from the end of the sliding groove section 111 closest to the adjacent side end face of the nut body 1 to the other end. Furthermore, each sliding groove section 111 has two limiting grooves 112 formed on its two opposite side walls, with both limiting grooves 112 located on the side edge of the sliding groove section 111 furthest from the opening.

[0047] Reference Figure 3 The number of sliding locking blocks 2 is equal to the number of sliding groove segments 111, and the shape and size of the sliding locking blocks 2 are the same as the shape and size of the sliding groove segments 111, so that the sliding locking blocks 2 can be matched and inserted into the sliding groove segments 111; at the same time, refer to Figure 4 Limiting portions 22 are provided on two opposite sides of the sliding lock block 2. The two limiting portions 22 are located on the side edge of the sliding lock block 2, and each limiting portion 22 is integrally formed with the sliding lock block 2. The shape of the limiting portion 22 is the same as the shape of the limiting groove 112. By inserting the sliding lock block 2 into the sliding groove section 111, the limiting portion 22 can match into the limiting groove 112, which can reduce the situation where the sliding lock block 2 leaves the sliding groove section 111 from the central opening of the nut body 1, and can enable the sliding lock block 2 to be initially installed in the sliding groove section 111.

[0048] A hook structure 3 is provided between the two sliding locking blocks 2 located in the same sliding chamber 11 to ensure that the two sliding locking blocks 2 are stably placed inside the sliding groove section 111, reducing the possibility of the sliding locking blocks 2 accidentally disengaging from the sliding groove section 111. Specifically, refer to... Figure 5The hook structure 3 includes two sets of movable mechanisms, which are respectively arranged on two adjacent sliding lock blocks 2. The movable mechanism includes a fixed support 31 and a rotating hook seat 32. The fixed support 31 is fixed to the side of the sliding lock block 2 near another adjacent sliding lock block 2, while the rotating hook seat 32 is rotatably mounted on the fixed support 31, so that the rotating hook seat 32 can rotate circumferentially around the connection position between itself and the fixed support 31.

[0049] Reference Figure 6 It should be noted that the side of the rotating hook seat 32 near the sliding lock block 2 can abut against the sliding lock block 2, and a reset component is embedded in the side of the rotating hook seat 32 near the sliding lock block 2. In this embodiment, the reset component is a magnet block 33. The sliding lock block 2 is made of carbon steel, so that there is a magnetic attraction between the magnet block 33 and the rotating hook seat 32, so that the rotating hook seat 32 can abut against the side of the sliding lock block 2 under normal conditions. The corner of the rotating hook seat 32 near the sliding lock block 2 is provided with a rounded corner 321, which allows the rotating hook seat 32 to rotate smoothly and avoid obstacles.

[0050] The rotating hook seat 32 has an integrally formed hook part 322 on its side away from the sliding lock block 2. The hook part 322 is L-shaped. The surface of the hook part 322 is provided with an inclined guide surface 323. (See reference...) Figure 3 When two sliding lock blocks 2 are installed together in the sliding chamber 11, that is, when the two sliding lock blocks 2 are simultaneously inserted into the two sliding groove sections 111 of the same sliding chamber 11, the two rotating hook seats 32 approach each other and eventually abut against each other. At this time, the two inclined guide surfaces 323 can abut against each other, and after forcing the two sliding lock blocks 2 to move towards each other again, the two rotating hook seats 32 can automatically rotate in opposite directions. Finally, the two hook parts 322 are misaligned, and the rotating hook seats 32 rotate back to their original position under the magnetic force of the magnet block 33. This allows the two hook parts 322 to cooperate and limit each other, and the inclined arrangement of the two sliding groove sections 111 can reduce the occurrence of the sliding lock blocks 2 accidentally disengaging from the sliding chamber 11.

[0051] Back Figure 5 It should be noted that in this embodiment, the two rotating hook seats 32 located in the same hook structure 3 are spaced apart along the radial direction of the nut body 1. The rotating hook seat 32 closer to the central axis of the nut body 1 is defined as the inner rotating hook seat 34, while the rotating hook seat 32 farther from the central axis of the nut body 1 is defined as the outer rotating hook seat 35. The width of the inner rotating hook seat 34 is greater than the width of the outer rotating hook seat 35. When the two rotating hook seats 32 are engaged with each other, the inner rotating hook seat 34 can be exposed on the side of the outer rotating hook seat 35.

[0052] Reference Figure 6The outer surface of the nut body 1 is provided with unlocking grooves 13. The number of unlocking grooves 13 is equal to the number of sliding chambers 11. Each unlocking groove 13 is connected to each sliding chamber 11, and the connection position between the unlocking groove 13 and the sliding chamber 11 is directly opposite to the connection position between two sliding groove segments 111 in the sliding chamber 11. An unlocking component 4 is installed inside the unlocking groove 13. The unlocking component 4 has two insertion posts 42 on its side near the sliding groove segment 111. The two insertion posts 42 are symmetrically arranged on both sides of the unlocking component 4 and are integrally formed with the unlocking component 4. The inner wall of the unlocking groove 13 has two insertion holes, each of which is connected to the sliding groove segment 111. By inserting the two insertion posts 42 into the two insertion holes respectively, the unlocking component 4 can be movably installed in the unlocking groove 13.

[0053] Each insertion post 42 is fitted with a spring 43 on its outer periphery. When the unlocking member 4 is movably installed in the unlocking groove 13, one end of the spring 43 abuts against the unlocking member 4, and the other end abuts against the inner wall of the unlocking groove 13. The spring 43 is always in a compressed state, which can generate an elastic force acting on the unlocking member 4 and force the unlocking member 4 to move away from the sliding chamber 11. The side of the unlocking member 4 near the sliding groove section 111 is also provided with a push post 41. The push post 41 is normally positioned opposite the exposed side of the inner rotating hook seat 34. When an external force forces the unlocking member 4 to move inward, the push post 41 can abut against the inner rotating hook seat 34 and force the inner rotating hook seat 34 to rotate towards the central axis of the nut body 1. Finally, the inner rotating hook seat 34 can be smoothly disengaged from the outer rotating hook seat 35, so as to facilitate the disassembly and maintenance of the sliding lock block 2.

[0054] Back Figure 3 The sliding locking block 2 has a threaded tooth segment 21 integrally formed on its side. When each sliding locking block 2 is stably placed in each sliding groove segment 111 through the hook structure 3, the threaded groove 12 and each threaded tooth segment 21 can be aligned with each other under normal conditions, thus forming an internal thread groove. The internal thread groove allows external bolts to pass through and be threadedly connected to it, thereby playing a role in connecting and locking the rotating parts.

[0055] Specifically, refer to Figure 7 The outer surface of the nut body 1 has connecting holes 14, the number of which is equal to the number of sliding groove segments 111. Each connecting hole 14 is connected to a corresponding sliding groove segment 111. A lock core 5 is fitted inside each connecting hole 14, and a cone head 51 is integrally formed at the end of the lock core 5. The sliding lock block 2 has a positioning cone groove 23 on its side away from the central axis of the nut body 1. The depth of the positioning cone groove 23 is greater than the axial length of the cone head 51, and the taper of the cone groove 23 is equal to the taper of the inner wall of the positioning cone groove 23.

[0056] After the sliding locking block 2 is stably placed in the sliding groove section 111 through the hook structure 3, the locking cylinder 5 can be set directly opposite the positioning cone groove 23. By forcing the locking cylinder 5 to move inward, the cone head 51 of the locking cylinder 5 can abut against the inner wall of the positioning cone groove 23 and continuously fine-tune the position of the sliding locking block 2. Finally, the locking cylinder 5 moves inward to the limit position, which can keep the threaded tooth section 21 and the threaded tooth groove 12 aligned under normal conditions, so as to ensure the correct formation of the internal thread groove and the normal use of the anti-loosening locking nut.

[0057] Simultaneously refer to Figure 3 The outer circumferential surface of the nut body 1 is covered by a thin protective plate 6. In this embodiment, all the connecting holes 14 are divided into two groups, and the two groups of connecting holes 14 are symmetrically arranged on both sides of the unlocking member 4. There are two thin protective plates 6. Each thin protective plate 6 can cover each connecting hole 14 in the same direction, so that the end of the lock cylinder 5 can abut against the thin protective plate 6 to limit the possibility of the lock cylinder 5 moving outward and disengaging from the connecting hole 14.

[0058] Back Figure 4 A repulsion structure 7 is also provided between two adjacent sliding locking blocks 2 located in the same sliding chamber 11. This structure can be used to force the two sliding locking blocks 2 away from each other, thereby tightening the bolts and preventing loosening. Specifically, the repulsion structure 7 includes an elastic bladder 71 bonded to the side of the sliding locking block 2 near the adjacent sliding locking block 2 and a magnetorheological fluid filled inside the elastic bladder 71. After the two sliding locking blocks 2 are stably placed in the sliding groove section 111 by the hook structure 3, the elastic bladder 71 can be in a state of pressure deformation, thereby normally forcing the two sliding locking blocks 2 away from each other.

[0059] In addition, when the wind turbine is powered on and generating electricity, the anti-loosening locking nut will be in a magnetic field environment. At this time, the magnetorheological fluid inside the elastic bladder 71 gradually exhibits high viscosity and low fluidity characteristics, which can further increase the force acting on the two sliding locking blocks 2, thereby increasing the force and clamping force on the bolt. This enables the loosening locking nut to have excellent anti-loosening effect, ensuring a stable connection between various rotating parts.

[0060] Back Figure 1 In this embodiment, the corrosion-resistant gasket 8 is made of stainless steel. There are two corrosion-resistant gaskets 8, which are respectively disposed on the two end faces of the nut body 1. Each corrosion-resistant gasket 8 covers each sliding groove segment 111 on the end face of the nut body 1 to reduce the entry of moisture and improve the anti-corrosion performance of the anti-loosening locking nut.

[0061] Simultaneously refer to Figure 7Two adjacent corrosion-resistant gaskets 8 are detachably connected by a plug-in structure 9. Specifically, the plug-in structure 9 includes a plug-in plate 91 disposed on one of the corrosion-resistant gaskets 8 and a plug-in interface 92 opened on the other corrosion-resistant gasket 8. The shape of the plug-in plate 91 is the same as the shape of the plug-in interface 92, and the plug-in plate 91 can be matched and inserted into the plug-in interface 92. The side of the plug-in plate 91 away from the corrosion-resistant gasket 8 is provided with an integrally formed hook portion 911. When connecting the two corrosion-resistant gaskets 8, by inserting the plug-in plate 91 into the plug-in interface 92, the hook portion 911 of the plug-in plate 91 deforms and enters the outside of the other corrosion-resistant gasket 8. At this time, the hook portion 911 can be locked on the side of the other corrosion-resistant gasket 8 to achieve a stable connection between the two corrosion-resistant gaskets 8.

[0062] It should be noted that in this embodiment, the number of plug-in structures 9 and the number of sliding chambers 11 are set to be equal. In the assembled state, that is, when the nut body 1, each sliding locking block 2 and the two corrosion-resistant washers 8 are assembled, the plug-in plate 91 can abut against the thin protective plate 6; when the sliding locking block 2 shifts outward, it will drive the lock cylinder 5 to move outward. At this time, the setting of the plug-in plate 91 can enhance the limiting effect on the lock cylinder 5. At the same time, after the plug-in plate 91 is subjected to force and bends outward, it has the tendency to pull the two corrosion-resistant washers 8 closer to each other, which is beneficial to enhance the anti-rust performance of the corrosion-resistant washers 8; in addition, returning to Figure 6 The plug plate 91 can also abut against the corresponding unlocking member 4 to prevent the unlocking member 4 from disengaging from the unlocking slot 13 under the elastic force of the spring 43.

[0063] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A locking nut for wind turbine generators, characterized in that: The nut body (1) includes a nut body (1) and multiple sliding locking blocks (2); wherein, the inner circumferential surface of the nut body (1) is provided with multiple sliding chambers (11) at intervals, and each sliding chamber (11) includes two symmetrically arranged and interconnected sliding groove segments (111), and the end of each sliding groove segment (111) away from the other sliding groove segment (111) is connected to the side end face of the nut body (1); the distance between the sliding groove segment (111) and the central axis of the nut body (1) gradually decreases from the end of the sliding groove segment (111) closest to the side end face of the adjacent nut body (1) to the other end; The number of sliding locking blocks (2) and sliding groove sections (111) are matched, and each sliding locking block (2) is slidably installed inside each sliding groove section (111); the inner side of the sliding locking block (2) is provided with threaded tooth sections (21), and the inner circumferential surface of the nut body (1) is provided with threaded tooth grooves (12). The threaded tooth grooves (12) and each threaded tooth section (21) are normally aligned with each other to form an internal threaded groove for external bolt connection; A hook structure (3) is provided between two sliding lock blocks (2) located in the same sliding chamber (11) to ensure that both sliding lock blocks (2) are stably placed in the sliding groove section (111); a repulsion structure (7) is also provided between two adjacent sliding lock blocks (2) to force the two sliding lock blocks (2) to move away from each other.

2. The anti-loosening locking nut according to claim 1, characterized in that: The hook structure (3) includes two sets of movable mechanisms, which are respectively located on opposite sides of two adjacent sliding lock blocks (2); The active mechanism includes a fixed support (31) fixed to the sliding lock block (2) and a rotating hook seat (32) rotatably mounted on the fixed support (31). A reset component is provided between the rotating hook seat (32) and the sliding lock block (2) to make the rotating hook seat (32) normally abut against the sliding lock block (2). Each of the rotating hook seats (32) has an inclined guide surface (323) on the side away from the sliding lock block (2). When the two sliding lock blocks (2) are installed together in the sliding chamber (11), the inclined guide surfaces (323) of the two sliding lock blocks (2) abut against each other to force the two rotating hook seats (32) to rotate in opposite directions.

3. The anti-loosening lock nut according to claim 2, characterized in that: The sliding lock block (2) is made of carbon steel, and the reset component is a magnet block (33) embedded on the side of the rotating hook seat (32). The magnet block (33) is located on the side of the rotating hook seat (32) near the sliding lock block (2).

4. The anti-loosening locking nut according to claim 2, characterized in that: The outer side of the nut body (1) is provided with an unlocking groove (13) that communicates with the sliding chamber (11). The unlocking groove (13) is directly connected to the two sliding groove sections (111). An unlocking component (4) is installed inside the unlocking groove (13). A spring (43) is provided between the unlocking component (4) and the inner wall of the unlocking groove (13). The spring (43) is used to force the unlocking component (4) to move away from the sliding chamber (11) in a normal state. Among the two rotating hook seats (32) located in the same hook structure (3), the rotating hook seat (32) closer to the central axis of the nut body (1) is set as the inner rotating hook seat (34), and the inner rotating hook seat (34) is partially exposed to the other rotating hook seat (32); the unlocking member (4) is provided with a push column (41) on the side near the sliding groove section (111). When the unlocking member (4) moves inward, the push column (41) abuts against the inner rotating hook seat (34) and forces the inner rotating hook seat (34) to rotate in the direction closer to the central axis of the nut body (1).

5. The anti-loosening lock nut according to claim 1, characterized in that: The repulsion structure (7) includes an elastic capsule (71) bonded to the side of the sliding lock block (2) near the adjacent sliding lock block (2) and a magnetorheological fluid filled inside the elastic capsule (71). When the two sliding lock blocks (2) are installed together in the sliding chamber (11), the elastic capsule (71) is in a state of pressure deformation.

6. The anti-loosening lock nut according to claim 1, characterized in that: The sliding lock block (2) is provided with limiting parts (22) on its two opposite sides. The limiting parts (22) are located on the side of the sliding lock block (2) away from the threaded tooth section (21). The sliding groove section (111) is provided with limiting grooves (112) on its two opposite side walls. When the sliding lock block (2) is installed in the sliding groove section (111), the limiting parts (22) match and enter the limiting grooves (112).

7. The anti-loosening lock nut according to claim 1, characterized in that: The outer side of the nut body (1) is provided with a connecting hole (14) that communicates with the sliding groove section (111). A lock core column (5) is fitted inside the connecting hole (14). The end of the lock core column (5) is provided with a cone head (51). The side of the sliding lock block (2) away from the central axis of the nut body (1) is provided with a positioning cone groove (23). The depth of the positioning cone groove (23) is greater than the axial length of the cone head (51), and the taper of the cone head (51) is adapted to the taper of the inner wall of the positioning cone groove (23). When the cone head (51) and the positioning cone groove (23) are positioned together, the threaded tooth section (21) of the sliding lock block (2) is aligned with the threaded tooth groove (12) of the nut body (1).

8. The anti-loosening lock nut according to claim 7, characterized in that: The outer circumferential surface of the nut body (1) is provided with a thin protective plate (6), which covers each of the circumferential connecting holes (14), and each of the lock cylinder pins (5) abuts against the thin protective plate (6).

9. The anti-loosening lock nut according to claim 8, characterized in that: It also includes two corrosion-resistant gaskets (8), which are respectively disposed on the two end faces of the nut body (1), and each corrosion-resistant gasket (8) covers each sliding groove segment (111) on the end face of the nut body (1); the two adjacent corrosion-resistant gaskets (8) are detachably connected by a plug-in structure (9).

10. The anti-loosening lock nut according to claim 9, characterized in that: The plug-in structure (9) includes a plug-in plate (91) disposed on one of the corrosion-resistant gaskets (8) and a plug-in interface (92) opened on the other corrosion-resistant gasket (8). The plug-in plate (91) and the plug-in interface (92) are plugged into each other. The plug-in plate (91) has a hook portion (911) on the side away from the corrosion-resistant gasket (8). In the assembled state, the hook portion (911) matches and abuts against the side of the other plug-in plate (91), and the plug-in plate (91) abuts against the thin protective sheet (6).

Images