A device for preventing the falling of a pitch bearing bolt

Abstract

The utility model discloses a kind of variable pitch bearing bolt anti-falling devices, it is related to wind power generation technical field, variable pitch bearing bolt exposed end is fixedly installed with circular nut and hexagon nut, including clamping structure, clamping structure clamps in circular nut outer periphery;Multiple sets of clamping structure are respectively installed on position corresponding variable pitch bearing bolt and are connected by screw to form a clamping tool;Fixed structure is distributed and installed on clamping structure and two sides extend to the hexagon nut above variable pitch bearing bolt exposed end and clamping connection;Rubber lining is along the shape distribution of clamping structure inside and is tightly attached with variable pitch bearing bolt outer wall;In the present application, variable pitch bearing bolt is clamped by clamping structure, bolt fracture can be prevented, and each set of clamping structure is connected with each other, even bolt fracture also cannot fall, fixed structure is shielded in the hexagon nut above variable pitch bearing bolt, variable pitch bearing bolt can be prevented from falling off, avoid to smash equipment, double protection, ensure that equipment runs smoothly.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a device for preventing the bolts of a pitch bearing from falling off. Background Technology

[0002] Pitch bearing bolts are components used to securely install pitch bearings. Pitch bearing bolts inside the wind turbine hub often break, and the breakage does not report a fault. Because the wind turbine impeller rotates continuously, the broken bolts keep turning inside the hub, damaging other components or cables. Only after the wind turbine reports a fault and personnel board the machine will they discover that the bolts are broken, causing damage to the equipment inside the hub, making subsequent handling and repair difficult and affecting the work progress. Therefore, there is an urgent need to design a pitch bearing bolt anti-loosening device that can prevent bolt breakage and prevent it from falling off even if it breaks, thus avoiding damage to the equipment, improving work efficiency, and ensuring stable equipment operation, thereby overcoming the shortcomings of existing technologies. Utility Model Content

[0003] The purpose of this invention is to provide a pitch bearing bolt anti-loosening device that can prevent bolt breakage and, even if the bolt breaks, will not fall off, thus avoiding damage to equipment, improving work efficiency, and ensuring stable equipment operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A pitch bearing bolt anti-loosening device, wherein a round nut and a hexagonal nut are fixedly installed on the exposed end of the pitch bearing bolt, comprising: A clamping structure, wherein the clamping structure clamps onto the outer periphery of a circular nut; Multiple sets of the clamping structures are respectively installed on the pitch bearing bolts at corresponding positions and connected by screws to form a clamping fixture; A fixing structure is distributed on the clamping structure and extends on both sides to the top of the hexagonal nut and is clamped and connected. A rubber liner, which is distributed along the inner side of the clamping structure and is tightly attached to the outer wall of the circular nut.

[0005] Furthermore, the clamping structure includes: Two clamps with identical structures: Clamp One and Clamp Two; The clamp has one integrally formed steel strip section 1, steel strip section 2, and steel strip section 3; One section of the steel strip has an arc-shaped structure; The first section of the steel strip extends outward from both ends to form a straight second section and a third section of the steel strip; The two sets of steel strip segments, one clamping the circular nut, and the other two segments are in close contact with each other.

[0006] Furthermore, the two sections of the steel strip are provided with first bolt holes; The steel strip has a second bolt hole and a third bolt hole respectively on its three sections; The clamping parts one and two clamping parts clamp the pitch bearing bolts to form a first bolt hole and a second bolt hole that are interconnected and connected by screws. The adjacent clamping structures are connected to form a third bolt hole on clamp part one and clamp part two, which are interconnected and connected by screws.

[0007] Furthermore, a first U-shaped mounting block is formed on one part of the clamp; A second U-shaped mounting block is formed on the two parts of the clamp; The fixing structure is distributed and installed on the first U-shaped mounting block and the second U-shaped mounting block.

[0008] Furthermore, the fixing structure includes: Clip 1 and Clip 2; One of the clips is installed on the first U-shaped mounting block; The two buckle parts are installed on the second U-shaped mounting block; The two parts of the buckle are hooked onto the first part of the buckle and cover the top of the hexagonal nut.

[0009] Furthermore, the rubber liner is formed with protrusions; The protrusion is located on the inside of a section of the steel strip to increase the friction between it and the round nut.

[0010] The pitch bearing bolt anti-loosening device of this utility model, as described above, has the following beneficial effects: In this application, the pitch bearing bolts are clamped by a clamping structure, which can prevent bolt breakage. The clamping structures are interconnected, so they will not fall off even if the bolt breaks. The fixing structure covers the hexagonal nut of the pitch bearing bolt, which can prevent the hexagonal nut from falling off and damaging the equipment. This double protection ensures smooth operation of the equipment. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0012] Figure 1 A schematic diagram of a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 2A partial structural schematic diagram of a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 3 A schematic diagram of the installation structure of a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 4 A schematic diagram of the installation structure of a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 5 A schematic diagram of the fixing structure in a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 6 A schematic diagram of the fixing structure in a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 7 A schematic diagram of the installation structure of clamp part one and clamp part two in a pitch bearing bolt anti-loosening device provided for an embodiment of this utility model; Figure 8 A schematic diagram of the clamp part in a pitch bearing bolt anti-loosening device provided in this embodiment of the utility model; Figure 9 This is a schematic diagram of the two clamp parts in a pitch bearing bolt anti-loosening device provided in an embodiment of the present utility model.

[0013] Explanation of reference numerals in the attached figures: 1. Round nut; 2. Hexagonal nut; 3. Clamping structure; 4. Fixing structure; 5. Rubber liner; 31. One clamp; 32. Two clamps; 33. First U-shaped mounting block; 34. Second U-shaped mounting block; 311. Steel strip section 1; 312. Steel strip section 2; 313. Steel strip section 3; 314. First bolt hole; 315. Second bolt hole; 316. Third bolt hole; 41. One buckle; 42. Two buckles; 51. Protrusion. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0015] It should be noted that the terms "outer periphery," "both sides," "both ends," etc., used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of illustrative purposes and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] See Figures 1-9 As shown; A pitch bearing bolt anti-loosening device is provided, wherein a round nut 1 and a hexagonal nut 2 are fixedly installed on the exposed end of the pitch bearing bolt. The device includes a clamping structure 3, a fixing structure 4, and a rubber liner 5. The clamping structure 3 clamps the outer circumference of the round nut and has a clamping part 31 and a clamping part 32. The clamping part 31 and the clamping part 32 have identical structures, each having an integrally formed steel strip section 311, a steel strip section 312, and a steel strip section 313. The steel strip section 311 is arc-shaped, while the steel strip sections 312 and 313 are straight. The three steel strip segments 313 are distributed on both sides of the first steel strip segment 311. During use, the second clamp segment 32 is flipped over to form a space with the first clamp segment 31 for clamping the pitch bearing bolt. That is, the two sets of first steel strip segments 311 open inwards to clamp the pitch bearing bolt. The two sets of first steel strip segments 311 clamp the outer periphery of the circular nut 1. The second steel strip segment 312 is the short side, and the third steel strip segment 313 is the long side. During installation, the third steel strip segment 313 of the first clamp segment 311 corresponds to the second steel strip segment 312 of the second clamp segment 32. After corresponding installation, the two sides of the clamping structure 3 form a stepped shape. Then, according to... Using the same method, two other sets of clamping structures 3 can be installed on both sides of one set of clamping structures 3. A first bolt hole 314 is provided on the second section 312 of the steel strip, and a second bolt hole 315 and a third bolt hole 316 are provided on the third section 313 of the steel strip. After the positions of the first section 311 of the clamping unit 31 and the clamping unit 32 are aligned, the first bolt hole 314 on the clamping unit 31 connects with the second bolt hole 315 on the clamping unit 32, and the second bolt hole 315 on the clamping unit 31 connects with the first bolt hole 314 on the clamping unit 32. Screws are screwed into the through bolt holes, thereby connecting and fixing clamp part 31 and clamp part 32. At the same time, clamp part 31 and clamp part 32 also clamp the pitch bearing bolt. Then, the assembled clamping structures 3 are connected to each other, and the corresponding third bolt holes 316 are connected. Screws are screwed into the connected third bolt holes 316 to connect the adjacent clamping structures 3. In this way, even if the pitch bearing bolt breaks, the broken pitch bearing bolt will not fall out of the equipment due to the mutual restraint between the clamping structures 3, thus avoiding damage to other parts in the equipment.

[0017] Furthermore, a first U-shaped mounting block 33 is formed on the clamp part 31, and a second U-shaped mounting block 34 is formed on the clamp part 32. The first U-shaped mounting block 33 and the second U-shaped mounting block 34 are distributed on the outer periphery of the steel strip section 311. A first buckle 41 and a second buckle 42 are respectively installed on the first U-shaped mounting block 33 and the second U-shaped mounting block 34. The first buckle 41 and the second buckle 42 are combined to form a fixed structure 4. The first buckle 41 and the second buckle 42 are metal rods with a certain elasticity. The second buckle 42 is hooked on the first buckle 41. The metal rods on both sides of the first buckle 41 are located above the hexagonal nut at the exposed end of the pitch bearing bolt. If the hexagonal nut loosens and gradually comes off the pitch bearing bolt, the first buckle 41 and the second buckle 42 can exert a reverse force on the hexagonal nut to stabilize the hexagonal nut in its current position, preventing the hexagonal nut from falling into the equipment and causing damage, and further ensuring the stable installation of the pitch bearing bolt.

[0018] All pitch bearing bolts are connected together by clamping structure 3, and a fixing structure 4 is set on it to prevent them from falling. In this way, even if a bolt breaks, it will be held in place by the clamping structure 3 next to it, so that it will not fall down and damage the equipment.

[0019] Preferably, the rubber liner 5 is distributed along the inner side of the clamping structure 3. The portion of the rubber liner 5 located on the steel belt section 311 has a protrusion 51. The protrusion 51 is in close contact with the outer wall of the circular nut on the pitch bearing bolt to increase the friction with the pitch bearing bolt, prevent the clamping structure 3 from falling off, and also avoid direct contact between the rigid structure and the pitch bearing bolt, which could cause damage.

[0020] Example 1: Relays are installed inside the equipment, and signal wires are connected in series at the base of all pitch bearing bolts. The relays are connected to the signal wire circuit, and the current change in the circuit of the signal wire controls the state of the relay. The relay can be connected to an alarm or an external controller. When a pitch bearing bolt breaks, an alarm will be triggered immediately, which will promptly notify maintenance personnel to check and repair it. The detection circuit is simple, the components are easy to install and diagnose, and multiple bolts of the wind turbine pitch bearing can be detected simultaneously, further improving work efficiency and ensuring the progress of the work.

[0021] At the same time, a normally closed micro switch can be installed under the clamping structure 3 and connected in series with the signal line to the wind turbine pitch safety chain signal circuit. When a bolt is loose, the micro switch becomes normally open, the wind turbine pitch safety chain fault is reported, and maintenance personnel can board the machine to check the bolt. The bolt that can be loosened by hand is the broken bolt.

[0022] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for preventing the pitch bearing bolt from falling off, wherein a round nut (1) and a hexagonal nut (2) are fixedly installed on the exposed end of the pitch bearing bolt, characterized in that, include: A clamping structure (3) clamps the outer periphery of a circular nut (1); Multiple sets of clamping structures (3) are respectively installed on the pitch bearing bolts at the corresponding positions and connected by screws to form a clamping fixture; The fixing structure (4) is distributed on the clamping structure (3) and extends on both sides to the top of the hexagonal nut (2) and is clamped and connected. A rubber liner (5) is distributed along the inner side of the clamping structure (3) and is attached to the outer wall of the circular nut (1).

2. The pitch bearing bolt anti-loosening device according to claim 1, characterized in that, The clamping structure (3) includes: Clamp Part 1 (31) and Clamp Part 2 (32) have the same structure; The clamp part (31) has an integrally formed steel strip section (311), a steel strip section (312), and a steel strip section (313). The steel strip section (311) has an arc-shaped structure; The first section (311) of the steel strip extends outward from both ends to form a straight second section (312) and a third section (313). The two sets of steel strip segments 1 (311) clamp the circular nut (1) and form corresponding steel strip segments 2 (312) and 3 (313) that fit together.

3. The pitch bearing bolt anti-loosening device according to claim 2, characterized in that: The steel strip has a first bolt hole (314) on the second section (312); The three sections (313) of the steel strip are respectively provided with a second bolt hole (315) and a third bolt hole (316). The clamp part (31) and clamp part (32) clamp the pitch bearing bolt to form a first bolt hole (314) and a second bolt hole (315) that are connected to each other and connected by screws; The adjacent clamping structures (3) are connected to form the third bolt holes (316) on clamp part one (31) and clamp part two (32) which are interconnected and connected by screws.

4. The pitch bearing bolt anti-loosening device according to claim 3, characterized in that: A first U-shaped mounting block (33) is formed on one part (31) of the clamp; A second U-shaped mounting block (34) is formed on the clamp part (32); The fixing structure (4) is distributed and installed on the first U-shaped mounting block (33) and the second U-shaped mounting block (34).

5. The pitch bearing bolt anti-loosening device according to claim 4, characterized in that, The fixing structure (4) includes: One buckle (41) and two buckles (42); The buckle (41) is installed on the first U-shaped mounting block (33); The two buckle parts (42) are installed on the second U-shaped mounting block (34); The two buckle parts (42) are hooked on the first buckle part (41) and cover the hexagonal nut (2).

6. The pitch bearing bolt anti-loosening device according to claim 2, characterized in that: The rubber liner (5) has protrusions (51); The protrusion (51) is located inside a section of the steel strip (311) to increase the friction between it and the round nut (1).

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