Stop collar for a yaw-torsion cable protection device and a yaw-torsion cable protection device

Abstract

The utility model discloses a kind of for yawing cable protection device's limit ring and yawing cable protection device. Among them, limit ring includes: fixed connecting seat, it is U-shaped, fixed connecting seat includes open end;Bearing wheel is set in the open end of fixed connecting seat, bearing wheel is rotatably connected with fixed connecting seat, pin shaft is connected bearing wheel and fixed connecting seat, pin shaft is rotatably connected with fixed connecting seat, pin shaft is fixedly connected with bearing wheel. The bearing wheel of limit ring is detachably connected with fixed connecting seat, without cutting steel wire rope, installation maintenance can be completed, bearing wheel and fixed connecting seat rotatably connected simultaneously, rigid sliding friction is converted into rolling friction, friction coefficient is significantly reduced, effectively reduce the abrasion of cable steel wire rope group in yawing motion.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine accessories, and in particular to a limiting ring and a yaw cable twisting protection device. Background Technology

[0002] The limit ring of the yaw torsion cable protection device currently in use for wind turbines adopts an integral circular metal ring structure. Its working principle is to achieve the limit function by directly passing the limit steel wire rope through the inner hole of the metal ring.

[0003] This structure has two drawbacks in practical applications: 1. During installation and maintenance, the wire rope must be cut, and the cut wire rope must be re-threaded into the metal ring and adjusted to the specified stroke position, which is a complicated and time-consuming process; 2. The metal ring and the wire rope are in rigid sliding friction contact, which is prone to wear during long-term yaw motion, leading to a decrease in the strength of the limit ring structure. More seriously, once the limit ring fails due to wear and perforation, the wind turbine will completely lose the last mechanical protection barrier against yaw cable twisting. This will not only directly cause serious electrical faults such as excessive cable twisting and breakage and short circuits, but may also cause a fire in the unit due to the high temperature generated by the electrical short circuit, resulting in a major equipment safety accident. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, the present invention provides a limiting ring and a yaw cable twisting protection device for a yaw cable twisting protection device, wherein the bearing wheel of the limiting ring is detachably connected to the fixed connecting seat, and installation and maintenance can be completed without cutting the wire rope. At the same time, the bearing wheel is rotatably connected to the fixed connecting seat, which converts rigid sliding friction into rolling friction, significantly reducing the coefficient of friction and effectively reducing the wear of the unwinding wire rope assembly during yaw motion.

[0006] Specifically, the following technical solutions are included: This utility model provides a limiting ring for a cable torsion protection device, the limiting ring comprising: A fixed connecting seat, U-shaped, including an open end; A bearing wheel is disposed in the open end of the fixed connecting seat. The bearing wheel is rotatably connected to the fixed connecting seat. A pin shaft passes through and connects the bearing wheel and the fixed connecting seat. The pin shaft is rotatably connected to the fixed connecting seat and fixedly connected to the bearing wheel.

[0007] Optionally, the fixed connecting seat includes a first plate and a second plate arranged in parallel, and a connecting plate connecting the first plate and the second plate; the limiting ring further includes: Bearings are disposed on the first plate and the second plate, and the pin is connected to the first plate and the second plate respectively through the bearings; A pair of bearing retaining rings are respectively disposed on the side of the first plate away from the second plate and on the side of the second plate away from the first plate, and the bearing retaining rings are sleeved on the pin.

[0008] Optionally, a mounting base is fixedly provided at the end of the fixed connecting seat away from the bearing wheel, and a threaded sleeve is fixedly provided on the mounting base.

[0009] Optionally, a protective sleeve is movably fitted around the mounting base.

[0010] Optionally, the protective sleeve is made of an elastic material, and the inner wall of the protective sleeve is interference-fitted with the outer wall of the mounting base.

[0011] Optionally, an elastic sleeve is provided on the outer wall of the pin, the pin is connected to the inner ring of the bearing through the outer wall of the elastic sleeve, and the pin is connected to the bearing wheel through the outer wall of the elastic sleeve.

[0012] Optionally, the bearing wheel is provided with an annular groove, and a rubber ring is fixedly provided in the annular groove.

[0013] Optionally, each end of the pin is movably fitted with a shaft elastic retaining spring.

[0014] Optionally, the bearing retaining ring is provided with an annular groove, and the shaft elastic retaining spring is disposed in the annular groove.

[0015] A second aspect of this utility model provides a yaw cable twisting protection device, the yaw cable twisting protection device comprising: The limiting ring as described above; A steel wire rope passes through the limiting ring.

[0016] This utility model provides a limiting ring for yaw cable twisting protection. The limiting ring includes a fixed connecting seat and a bearing wheel connected to the fixed connecting seat. The fixed connecting seat is U-shaped, forming an open end. The bearing wheel is positioned within the open end. A pin passes through the fixed connecting seat and the bearing wheel, achieving a rotatable connection between the bearing wheel and the fixed connecting seat. The pin is rotatably connected to the fixed connecting seat and fixedly connected to the bearing wheel. When the bearing wheel rotates under the drive of the wire rope, the pin rotates together with the bearing wheel. The bearing wheel can be disassembled from the fixed connecting seat by removing the pin, enabling installation and maintenance without cutting the wire rope, thus improving disassembly and assembly efficiency. Due to the rotatable connection between the bearing wheel and the fixed connecting seat, the existing rigid sliding friction is converted into rolling friction, significantly reducing the friction coefficient and effectively reducing the wear of the wire rope during yaw motion. This also improves the fatigue resistance and structural stability of the limiting ring during long-term operation, reducing the risk of limiting ring failure and enhancing the safety of the limiting ring.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an angle of the limiting ring according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the limiting ring from another angle according to an embodiment of the present invention; Figure 3 This is an exploded view of a limiting ring according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the connection between the limit ring, the limit switch, and the wire rope according to an embodiment of the present invention.

[0020] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Fixed connecting seat, 11. Mounting seat, 111. Protective sleeve, 12. Threaded sleeve, 13. Bearing, 2. Bearing wheel, 21. Rubber ring, 3. Pin, 31. Elastic sleeve, 4. Bearing retaining ring, 41. Annular groove, 5. Elastic snap ring for shaft, 10. Limit switch, 20. Steel wire rope. Detailed Implementation

[0021] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Before providing a further detailed description of the embodiments of this utility model, the directional terms used in the embodiments of this utility model, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the scope of protection of this utility model.

[0023] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 4 As shown, one embodiment of this utility model provides a limiting ring for a yaw cable twisting protection device, the limiting ring comprising: The fixed connecting seat 1 is U-shaped and includes an open end; The bearing wheel 2 is located inside the open end of the fixed connecting seat 1. The bearing wheel 2 is rotatably connected to the fixed connecting seat 1. The pin 3 passes through and connects the bearing wheel 2 and the fixed connecting seat 1. The pin 3 is rotatably connected to the fixed connecting seat 1 and is fixedly connected to the bearing wheel 2.

[0025] The limiting ring includes a fixed connecting seat 1 and a bearing wheel 2 connected to the fixed connecting seat 1. The fixed connecting seat 1 is U-shaped, forming an open end. The bearing wheel 2 is located inside the open end. A pin 3 passes through the fixed connecting seat 1 and the bearing wheel 2, achieving a rotatable connection between the bearing wheel 2 and the fixed connecting seat 1. The pin 3 is rotatably connected to the fixed connecting seat 1, while simultaneously being fixedly connected to the bearing wheel 2. When the bearing wheel 2 rotates under the drive of the wire rope 20, the pin 3 rotates together with the bearing wheel 2. The bearing wheel 2 can be disassembled from the fixed connecting seat 1 by removing the pin 3, enabling installation and maintenance without cutting the wire rope 20, thus improving disassembly and assembly efficiency. Due to the rotatable connection between the bearing wheel 2 and the fixed connecting seat 1, the existing rigid sliding friction is transformed into rolling friction, significantly reducing the coefficient of friction and effectively reducing the wear of the wire rope 20 during yaw motion. This also improves the fatigue resistance and structural stability of the limiting ring during long-term operation, reduces the risk of limiting ring failure, and enhances the safety of the limiting ring in use.

[0026] In one feasible embodiment, the fixed connecting seat 1 includes a first plate and a second plate arranged in parallel, and a connecting plate connecting the first plate and the second plate; the limiting ring further includes: Bearing 13 is disposed on the first plate and the second plate, and pin 3 is connected to the first plate and the second plate respectively through bearing 13; Bearing retaining ring 4, a pair of bearing retaining rings are respectively disposed on the side of the first plate away from the second plate and on the side of the second plate away from the first plate, and the bearing retaining ring 4 is sleeved on the pin 3.

[0027] Specifically, the limiting ring includes a fixed connecting seat 1, a bearing wheel 2, a pin 3, a bearing retaining ring 4, and a shaft elastic retaining spring 5. Two bearing retaining rings 4 and two shaft elastic retaining springs 5 ​​are provided. A mounting seat 11 is provided at the end of the fixed connecting seat 1 furthest from the bearing wheel 2, such as... Figure 2 and Figure 3 As shown, a threaded sleeve 12 is fixedly provided on the mounting base 11, and a protective sleeve 111 is movably sleeved on the outer wall of the mounting base 11. The protective sleeve 111 is made of elastic material, and the inner wall of the protective sleeve 111 is interference-fitted with the outer wall of the mounting base 11. By setting the threaded sleeve 12 and the protective sleeve 111 on the mounting base 11, the threaded rod at the end of the limit switch 10 can be installed in the threaded sleeve 12, thereby realizing the connection between the limit switch 10 and the fixed connecting base 1. Manually pulling the protective sleeve 111, as shown... Figure 4 As shown, the protective sleeve 111 can move horizontally on the mounting base 11, which means that the connection between the mounting base 11 and the limit switch 10 can be protected by the protective sleeve 111. While ensuring the stability of the connection, it can also prevent dust from entering and improve the durability of the connection.

[0028] Among them, such as Figure 3As shown, two bearings 13 are fixedly mounted on one end of the fixed connecting seat 1. A pin 3 passes through the bearing 13, and a bearing retaining ring 4 is fixedly mounted on the outside of the fixed connecting seat 1 to shield the bearing 13 and prevent it from falling off the first and second plates. The pin 3 also passes through the bearing retaining ring 4. An elastic sleeve 31 is fixedly mounted on the outer wall of the pin 3. The inner wall of the elastic sleeve 31 is connected to the inner ring of the bearing 13. By mounting the elastic sleeve 31 on the outer wall of the pin 3, the stability of the connection between the pin 3 and the bearing wheel 2, as well as between the pin 3 and the bearing 13, can be improved. The elastic sleeve 31 can increase the friction coefficient of the connection. Thus, when the wire rope 20 drives the bearing wheel 2 to rotate, it drives the pin 3, which is fixedly connected to the bearing wheel 2, to rotate. The pin drives the inner ring of the bearing 13 to rotate together, and the elastic sleeve 31 avoids the bearing. The retaining ring 4 is designed to allow the pin 3 and the bearing retaining ring 4 to be in a time-recessed fit, meaning that the pin 3 can rotate within the bearing retaining ring 4. Due to the elastic sleeve 31, a fixed connection is achieved by increasing friction, eliminating the need for additional welding or pin fixing, thus improving the ease of assembly and disassembly. Disassembly can be achieved as long as the applied external force is greater than the connecting friction. The rolling friction of the steel wire rope 20 driving the bearing wheel 2 is less than this connecting friction, thus enabling the pin 3 and the bearing wheel 2 to be fixedly connected through the elastic sleeve 31.

[0029] It should be noted that the shaft elastic snap ring 5 is movably sleeved on the outer wall of one end of the pin 3, usually avoiding the elastic sleeve 31. The setting of the shaft elastic snap ring 5 can axially lock the pin 3, ensuring that the bearing wheel 2 is stably installed on the fixed connecting seat 1, preventing the pin 3 from falling out of the hole, and thus preventing the bearing wheel 2 from falling out.

[0030] In one feasible embodiment, the bearing retaining ring 4 is provided with an annular groove 41, and the shaft elastic retaining spring 5 is disposed in the annular groove 41.

[0031] The bearing retaining ring 4 has an annular groove 41 on the side opposite to the fixed connecting seat 1. A shaft elastic retainer 5 is disposed within the annular groove 41, with the outer wall of the open end of the retainer 5 in movable contact with the peripheral wall of the annular groove 41. When the shaft elastic retainer 5 enters the annular groove 41, it can be limited in position. During installation, the two jaws of a retainer pliers are inserted into the two holes at the open end of the shaft elastic retainer 5. By opening the jaws of the retainer pliers, the open end of the shaft elastic retainer 5 is enlarged, allowing the shaft elastic retainer 5 to be fitted onto the end of the pin 3. After being pushed into the annular groove 41, the opening is closed using the retainer pliers, thus securing the pin 3 with the shaft elastic retainer 5. When it is necessary to disassemble the bearing wheel 2, the opening of the axial elastic snap ring 5 is slightly opened with snap ring pliers to facilitate the separation of the axial elastic snap ring 5 from the pin 3 and to allow it to be removed from the annular groove 41. Then, the opening of the axial elastic snap ring 5 is enlarged again so that the axial elastic snap ring 5 can be removed from the pin 3, thereby facilitating the removal of the pin 3 from the fixed connecting seat 1 and making it easier to remove the bearing seat 2 for maintenance and replacement.

[0032] In one feasible embodiment, the bearing wheel 2 is provided with an annular groove, and a rubber ring 21 is fixedly provided in the annular groove.

[0033] Among them, a rubber ring 21 is fixedly installed in the groove of the bearing wheel 2. By setting the bearing wheel 2 and the rubber ring 21, the wire rope 20 can extend along the groove of the bearing wheel 2 after entering the interior of the fixed connecting seat 1. The rubber ring 21 can reduce the wear of the wire rope 20.

[0034] It should be noted that during assembly, the pin 3 passes sequentially through the bearing retaining ring 4, bearing 13, and the inner ring of bearing wheel 2. The two jaws of the snap ring pliers are used to open the shaft elastic snap ring 5. The shaft elastic snap ring 5 is then placed on the end of the pin 3 and slid into the annular groove 41. The opening of the axial elastic snap ring 5 narrows, axially locking the pin 3 and ensuring that the bearing wheel 2 is securely installed on the fixed connecting seat 1, preventing the bearing wheel 2 from loosening or falling off. When replacement is required, the shaft elastic snap ring 5 is disassembled using the snap ring pliers to separate it from the pin 3. Then, the pin 3 is pulled out, and the bearing wheel 2 can be removed from the fixed connecting seat 1. The replaced bearing wheel 2 can then be installed in the fixed connecting seat 1 according to the above assembly steps. The replacement of the bearing wheel 2 can be completed quickly without cutting the steel wire rope 20.

[0035] As can be seen, this application, through its modular assembly structure, enables the rapid disassembly and fixing of the bearing wheel 2. Replacement of the bearing wheel 2 can be completed without cutting the wire rope 20, simplifying the traditional complex disassembly process, improving disassembly and assembly efficiency, and reducing maintenance difficulty and time costs. By converting the sliding friction between the traditional limit ring and the wire rope 20 into the rolling friction of the rotatable bearing wheel 2, and using the bearing wheel 2 as the core functional component, the coefficient of friction between the wire rope 20 and the bearing wheel 2 is significantly reduced, effectively reducing the wear of the wire rope 20 during yaw motion. Simultaneously, it improves the fatigue performance and structural stability of the limit ring during long-term operation, reducing the risk of limit ring failure. This reduces the labor time for replacing the limit ring of the yaw cable twisting protection device, improves replacement efficiency, significantly shortens wind turbine downtime for maintenance, and increases the availability of the wind turbine unit. In other words, through the synergistic effect of modular structure and rolling friction technology, the limiting ring of this application improves the reliability of the yaw torsion cable protection device, effectively avoids the risk of wire rope 20 protection failure caused by wear through the limiting ring, fundamentally prevents the occurrence of serious electrical faults such as excessive torsion breakage and short circuit of wire rope 20, and thus reduces major safety accidents such as wind turbine fires caused by these faults, providing a solid guarantee for the long-term safe and stable operation of wind turbine units.

[0036] Another embodiment of this utility model provides a yaw cable twisting protection device, which includes: Such as the aforementioned limiting ring; 20mm steel wire rope, passing through the limit ring.

[0037] The detachable connection of the bearing wheel 2 on the limit ring eliminates the need to cut the wire rope 20 during replacement and maintenance, thus improving disassembly and assembly efficiency. The rotating connection between the bearing wheel 2 and the fixed connecting seat 1 transforms the existing rigid sliding friction into rolling friction, significantly reducing the coefficient of friction and effectively minimizing wear on the wire rope 20 during yaw motion. This also enhances the fatigue resistance and structural stability of the limit ring during long-term operation, reducing the risk of limit ring failure and improving the safety of its use.

[0038] Since the yaw cable twisting protection device includes the aforementioned limit ring, it also possesses all the advantages of the aforementioned limit switch, which will not be elaborated further.

[0039] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0040] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0041] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A limiting ring for a yaw cable twisting protection device, characterized in that, The limiting ring includes: A fixed connecting seat, U-shaped, including an open end; A bearing wheel is disposed in the open end of the fixed connecting seat. The bearing wheel is rotatably connected to the fixed connecting seat. A pin shaft passes through and connects the bearing wheel and the fixed connecting seat. The pin shaft is rotatably connected to the fixed connecting seat and fixedly connected to the bearing wheel.

2. The limiting ring for the yaw cable twisting protection device according to claim 1, characterized in that, The fixed connecting seat includes a first plate and a second plate arranged in parallel, and a connecting plate connecting the first plate and the second plate. The limiting ring further includes: Bearings are disposed on the first plate and the second plate, and the pin is connected to the first plate and the second plate respectively through the bearings; A pair of bearing retaining rings are respectively disposed on the side of the first plate away from the second plate and on the side of the second plate away from the first plate, and the bearing retaining rings are sleeved on the pin.

3. The limiting ring for the yaw cable twisting protection device according to claim 1, characterized in that, The fixed connecting seat is fixedly provided with a mounting seat at the end away from the bearing wheel, and a threaded sleeve is fixedly provided on the mounting seat.

4. The limiting ring for the yaw cable twisting protection device according to claim 3, characterized in that, The mounting base is fitted with a protective sleeve.

5. The limiting ring for a yaw cable twisting protection device according to claim 4, characterized in that, The protective sleeve is made of an elastic material, and the inner wall of the protective sleeve is interference-fitted with the outer wall of the mounting base.

6. The limiting ring for the yaw cable twisting protection device according to claim 2, characterized in that, An elastic sleeve is provided on the outer wall of the pin, and the pin is connected to the inner ring of the bearing through the outer wall of the elastic sleeve, and the pin is connected to the bearing wheel through the outer wall of the elastic sleeve.

7. The limiting ring for a yaw cable twisting protection device according to claim 1, characterized in that, The bearing wheel is provided with a circular groove, and a rubber ring is fixedly installed in the circular groove.

8. The limiting ring for a yaw cable twisting protection device according to claim 2, characterized in that, Both ends of the pin are respectively fitted with shaft elastic retaining rings.

9. The limiting ring for a yaw cable twisting protection device according to claim 8, characterized in that, The bearing retaining ring has an annular groove, and the shaft elastic retaining spring is disposed in the annular groove.

10. A yaw cable twisting protection device, characterized in that, The yaw cable twisting protection device includes: The limiting ring as described in any one of claims 1 to 9; A steel wire rope passes through the limiting ring.

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