On-site coil replacement system and method for cabin transformer for wind power generation
By using a field coil replacement system for wind turbine nacelles, the sliding connection between the upper and lower clamps and the core assembly, along with a hoisting mechanism, the coils can be easily replaced and precisely assembled, solving the problems of cumbersome operation and inaccuracy in existing technologies.
Patent Information
- Application Number
- CN202511822798.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-03-03
AI Technical Summary
The current operation of replacing coils in the nacelle of wind power generation is cumbersome, requiring the entire transformer to be removed and disassembled, which is inconvenient and inaccurate.
A field coil replacement system for wind power generation nacelles is designed. The system enables convenient coil replacement through the sliding connection between the upper and lower clamps and the core assembly, as well as the hoisting mechanism. The interlocking design of the core yoke and the core assembly improves the accuracy of the replacement.
The coil can be replaced without completely disassembling the transformer, improving the convenience and accuracy of on-site replacement.
Smart Images
Figure CN121601394A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of wind power generation technology, specifically relating to a system and method for on-site replacement of coils in a wind power nacelle. Background Technology
[0002] A wind turbine nacelle transformer is a transformer used in the wind power generation field. The iron core and coils in the transformer are important components for realizing the transformation function. The iron core is usually made of laminated silicon steel sheets, and the coils are usually made of wound metal wires. In use, the iron core is usually inside, while the coils are wrapped around the iron core from the outside.
[0003] When replacing the coils in existing wind turbine nacelles, it is usually necessary to remove the entire transformer for disassembly, remove the old coils, and install new coils to replace the old ones. However, this method is cumbersome and not conducive to on-site coil replacement. How to conveniently replace the coils without removing the entire transformer is an urgent problem to be solved in on-site coil replacement. Summary of the Invention
[0004] The purpose of this invention is to provide a system and method for on-site coil replacement in a wind power generation nacelle. This system allows for coil replacement from either the top or bottom by selectively removing one of the upper or lower clamps, eliminating the need to remove or disassemble the entire transformer. This improves the convenience of on-site coil replacement. Furthermore, the interlocking design of the core yoke and core assembly facilitates alignment and positioning of the core yoke and core assembly during assembly, enhancing the accuracy of on-site coil replacement.
[0005] The specific technical solution adopted by this invention is as follows: A field-replacement coil system for a wind turbine nacelle includes: Transformer housing; A transformer is disposed inside a transformer housing. The transformer includes a lower clamp disposed inside the transformer housing, an upper clamp slidably mounted above the lower clamp, and iron core yokes fixedly connected to both the lower and upper clamps. An iron core assembly is disposed between the two iron core yokes. The lower and upper clamps are detachably connected to the iron core assembly. The upper and lower ends of the iron core assembly are respectively engaged with the two iron core yokes. A coil is detachably connected to the iron core assembly. The hoisting mechanism is located inside the transformer box. The hoisting mechanism includes a hoisting frame located inside the transformer box. A lifting assembly is installed on the hoisting frame. The working end of the lifting assembly is detachably connected to the upper clamp. In this process, after the lifting assembly is in operation, the height of the transformer is adjusted by the upper clamp. After the lower clamp and the upper clamp are separated from the core assembly, the lower clamp and the upper clamp slide relative to each other, causing the core yoke to separate from the core assembly.
[0006] As a preferred embodiment of the on-site replacement coil system for wind power generation nacelle according to the present invention, the core assembly includes a first core column located in the middle and two second core columns located on both sides. The first core column and the two second core columns are arranged along the same horizontal straight line. Both ends of the first core column are provided with protrusions, and both ends of the second core columns are provided with first oblique cuts. The core yoke is provided with recesses, which are fitted into the protrusions. Both ends of the core yoke are provided with second oblique cuts, which fit snugly into the first oblique cuts.
[0007] As a preferred embodiment of the on-site replacement coil system for wind power generation nacelle described in this invention, the two second iron core columns are symmetrically arranged, and the first oblique cut portion faces the side closer to the first iron core column.
[0008] As a preferred embodiment of the on-site coil replacement system for wind power generation nacelle described in this invention, the two core yokes are symmetrically arranged, and the recessed portion is located on the side of the core yoke closer to the core assembly.
[0009] As a preferred embodiment of the on-site replacement coil system for wind power generation nacelle described in this invention, the protrusion is provided with a first wedge-shaped surface on both sides, and the recess is provided with a second wedge-shaped surface on both sides, wherein the first wedge-shaped surface and the second wedge-shaped surface fit together.
[0010] As a preferred embodiment of the on-site coil replacement system for wind power generation nacelle described in this invention, the core assembly is fixedly connected with a plurality of first connecting plates, each of the first connecting plates having a first connecting hole at both ends, and the lower clamp and the upper clamp each having a plurality of second connecting holes, with a first connecting bolt detachably connected between the first connecting hole and the second connecting hole.
[0011] As a preferred embodiment of the on-site coil replacement system for wind power generation nacelle described in this invention, the lower clamp and the upper clamp are each provided with a plurality of third connecting holes, the outer side of the core yoke is fixedly connected with a plurality of second connecting plates, the second connecting plates are provided with a plurality of fourth connecting holes, and the third connecting holes and the fourth connecting holes are detachably connected with second connecting bolts.
[0012] As a preferred embodiment of the on-site coil replacement system for wind power generation nacelle described in this invention, a plurality of electric telescopic cylinders are provided between the lower clamp and the upper clamp, the electric telescopic cylinders are fixedly connected to the lower clamp, and the output end of the electric telescopic cylinders is fixedly connected to the upper clamp.
[0013] As a preferred embodiment of the on-site coil replacement system for wind power generation nacelle described in this invention, two electric telescopic cylinders are provided, and the two electric telescopic cylinders are respectively located at both ends of the lower clamp.
[0014] A method for on-site replacement of coil systems for wind turbine nacelles, the method using the aforementioned on-site replacement coil system for wind turbine nacelles, the specific method is as follows: S1: First, connect the working end of the lifting assembly to the upper clamp. After the lifting assembly is working, it drives the transformer to rise through the upper clamp. S2: When it is necessary to replace the coil from the top, disassemble the upper clamp and the iron core assembly. After the lower clamp and the upper clamp slide relative to each other and move away from each other, the iron core assembly is disengaged from the iron core yoke of the upper clamp, so that the old coil can be removed from the top of the iron core assembly. Install the new coil on the iron core assembly. After the lower clamp and the upper clamp slide relative to each other and move closer to each other, install the upper clamp and the iron core assembly together. S3: When it is necessary to replace the coil from below, disassemble the lower clamp and the core assembly. After the lower clamp and the upper clamp slide relative to each other and move away from each other, the core assembly and the core yoke of the lower clamp will be disengaged, so that the old coil can be removed from the bottom of the core assembly. Install the new coil on the core assembly. After the lower clamp and the upper clamp slide relative to each other and move closer to each other, install the lower clamp and the core assembly together. S4: After the lifting assembly starts working, it drives the transformer to the bottom of the transformer box through the upper clamp, disconnecting the connection between the working end of the lifting assembly and the upper clamp, thereby realizing the replacement of the coil.
[0015] The technical effects achieved by this invention are as follows: This invention employs a transformer and hoisting mechanism design. The hoisting mechanism lifts the transformer using a lifting assembly to raise its height, reserving operational space for subsequent coil replacement. The upper and lower clamps are slidably connected to separate the core assembly and the core yoke. By selectively disassembling the core assembly from the upper clamp or the lower clamp, the core assembly can be separated from the upper or lower core yoke, facilitating coil replacement from either the top or bottom of the core assembly. This improves the flexibility of on-site coil replacement. Compared to existing technologies, coil replacement does not require removing or disassembling the entire transformer. Instead, coil replacement is achieved by removing one of the two core yokes located at the top and bottom, enhancing the convenience of on-site coil replacement. This invention employs a design where the core yoke and core assembly are interlocked. During the transformer restoration process after coil replacement, the core yoke and core assembly need to be reassembled. The upper and lower clamps slide relative to each other, reducing the distance between them and bringing the core yoke and core assembly closer together. In this process, the interlocking of the core yoke and core assembly facilitates their alignment and positioning, making the assembly process more precise and improving the accuracy of coil replacement on-site. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the transformer and hoisting mechanism in this invention; Figure 3 This is a schematic diagram of the core assembly and coil in this invention; Figure 4 This is a schematic diagram of the structure of the upper clamp and the iron core in this invention; Figure 5 This is an exploded view of the upper clamp and the iron core yoke in this invention; Figure 6 This is a schematic diagram of the structure of the iron core yoke and the first iron core column in this invention; Figure 7 This is an exploded schematic diagram of the iron core yoke and the first iron core column in this invention; Figure 8 This is a schematic diagram of the structure of the hoisting frame and lifting assembly in this invention; Figure 9 This is a schematic diagram of the lower clamp and the electric telescopic cylinder in this invention.
[0017] The attached diagram lists the components represented by each number as follows: 10. Transformer housing; 20. Transformer; 21. Lower clamp; 22. Upper clamp; 23. Core yoke; 24. Core assembly; 25. Coil; 30. Lifting mechanism; 31. Lifting frame; 32. Lifting assembly; 41. First core column; 42. Second core column; 43. Protrusion; 44. First oblique cut; 45. Recess; 46. Second oblique cut; 47. First wedge surface; 48. Second wedge surface; 51. First connecting plate; 52. First connecting hole; 53. Second connecting hole; 54. First connecting bolt; 61. Third connecting hole; 62. Second connecting plate; 63. Fourth connecting hole; 64. Second connecting bolt; 71. Electric telescopic cylinder. Detailed Implementation
[0018] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.
[0019] Example 1 like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, this is the first embodiment of the present invention. This first embodiment provides a system and method for on-site coil replacement in a wind turbine nacelle, including a transformer housing 10; a transformer 20, which is disposed inside the transformer housing 10. The transformer 20 includes a lower clamp 21 disposed inside the transformer housing 10, and an upper clamp 22 slidably mounted above the lower clamp 21. Iron core yokes 23 are fixedly connected to both the lower clamp 21 and the upper clamp 22, and an iron core assembly 2 is disposed between the two iron core yokes 23. 4. Both the lower clamp 21 and the upper clamp 22 are detachably connected to the core assembly 24. The upper and lower ends of the core assembly 24 are respectively engaged with two core yokes 23. A coil 25 is detachably connected to the core assembly 24. The hoisting mechanism 30 is located inside the transformer box 10. The hoisting mechanism 30 includes a hoisting frame 31 located inside the transformer box 10. A lifting assembly 32 is installed on the hoisting frame 31. The working end of the lifting assembly 32 is detachably connected to the upper clamp 22.
[0020] It should be noted that the hoisting frame 31 is preferably a gantry frame in this invention. The gantry frame is existing technology and is used to provide a sturdy suspension support point higher than the transformer 20. Several rollers are fixedly installed at the bottom of the gantry frame for moving it. The lifting assembly 32 is preferably an electric hoist in this invention. The electric hoist is existing technology and is used to lift the transformer 20 through its extendable working end. The electric hoist is slidably installed with the gantry frame via a motor and pulleys. The working end of the electric hoist is provided with a hook, and the upper clamp 22 has a through hole. The hook and the through hole are fitted together. The working end of the electric hoist and the upper clamp 22 are detachably connected together via the hook and the through hole. The coil 25 is existing technology. 25 is a hollow structure. The coil 25 and the iron core assembly 24 are detachably connected together by a sleeve wrapping method, that is, the iron core assembly 24 is inserted inside the coil 25. The iron core yoke 23 and the iron core assembly 24 are both made of several layers of silicon steel sheets to reduce eddy current losses, which will not be described in detail here. In the initial state, the working end of the lifting assembly 32 is not connected to the upper clamp 22. The lower clamp 21 and the upper clamp 22 are respectively connected to their respective iron core yokes 23. The lower clamp 21 and the upper clamp 22 are both connected to the iron core assembly 24. The iron core assembly 24 is fitted with the iron core yoke 23. The bottom of the transformer 20 is in contact with the bottom inner side of the transformer box 10, that is, the transformer 20 is located on the bottom inner side of the transformer box 10.
[0021] In use, when coil 25 needs to be replaced, the working end of the lifting assembly 32 is connected to the upper clamp 22. After the lifting assembly 32 operates, it drives the upper clamp 22 upward through its working end, causing the transformer 20 to move upward as a whole. This increases the distance between the bottom of the transformer 20 and the inner bottom of the transformer housing 10, reserving operating space for subsequent coil 25 replacement. When coil 25 needs to be replaced from above the core assembly 24, the upper clamp 22 is disassembled from the core assembly 24. After the upper clamp 22 slides along the lower clamp 21, the distance between the lower clamp 21 and the upper clamp 22 increases. Since the core assembly 24 and the lower clamp 21 remain relatively fixed at this time, the upper clamp 22 drives the iron core yoke 23 on the upper clamp 22 and the iron core yoke 22. When the core assembly 24 is disengaged, the core yoke 23, located above the core assembly 24, removes the obstruction of the core yoke 23, facilitating the removal of the old coil 25 from above and the placement of the new coil 25 onto the core assembly 24. This allows for coil 25 replacement from above the core assembly 24. When coil 25 needs to be replaced from below the core assembly 24, the lower clamp 21 is disengaged from the core assembly 24. The upper clamp 22 slides along the lower clamp 21, increasing the distance between them. Since the core assembly 24 and the upper clamp 22 remain relatively fixed, the lower clamp 21 causes the core yoke 23 on it to disengage from the core assembly 24. Because the core yoke 23 is located below the core assembly 24, the lower part of the core assembly 24 is no longer obstructed by the core yoke 23. This facilitates the removal of the old coil 25 from below the core assembly 24 and the placement of the new coil 25 onto the core assembly 24, enabling coil 25 replacement from below the core assembly 24. After replacement, a reset is required. As the upper clamp 22 slides along the lower clamp 21, the distance between the lower clamp 21 and the upper clamp 22 decreases, causing the core yoke 23 and the core assembly 24 to approach each other until they are in contact. This interlocking of the core yoke 23 and the core assembly 24 facilitates alignment and positioning of the core yoke 23 and the core assembly 24 during the contact process. This facilitates the assembly of the core yoke 23 and the core assembly 24. If the coil 25 is replaced from above the core assembly 24, the core assembly 24 is connected to the upper clamp 22. If the coil 25 is replaced from below the core assembly 24, the core assembly 24 is connected to the lower clamp 21. This restores the structure of the transformer 20. After the lifting assembly 32 operates, its working end drives the upper clamp 22 downwards, causing the transformer 20 to move downwards until the bottom of the transformer 20 is in contact with the inner bottom of the transformer housing 10. This restores the height of the transformer 20. The working end of the lifting assembly 32 is then disconnected from the upper clamp 22, allowing for on-site replacement of the coil 25. Compared with existing technologies…The replacement of coil 25 does not require the entire transformer 20 to be removed or disassembled. Instead, coil 25 is replaced by removing one of the two core yokes 23 located at the upper and lower ends, improving the convenience of on-site coil replacement. Furthermore, by selectively removing one of the two core yokes 23 located at the upper or lower ends, coil 25 can be replaced from either top or bottom, increasing the flexibility of on-site coil replacement. Moreover, the interlocking mechanism between the core assembly 24 and the core yoke 23 during resetting ensures more precise assembly of the core yoke 23 and core assembly 24, improving the accuracy of on-site coil replacement.
[0022] Example 2 Reference Figures 1 to 9 This is the second embodiment of the present invention, which is based on the previous embodiment.
[0023] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the core assembly 24 includes a first core post 41 located in the middle and two second core posts 42 located on both sides. The first core post 41 and the two second core posts 42 are arranged along the same horizontal straight line. Both ends of the first core post 41 are provided with protrusions 43, and both ends of the second core post 42 are provided with first oblique cuts 44. The core yoke 23 is provided with recesses 45, which are fitted into the protrusions 43. Both ends of the core yoke 23 are provided with second oblique cuts 46, which are fitted into the first oblique cuts 44.
[0024] It should be noted that the recessed part 45 is located in the middle position on the core yoke 23. In the initial state, the core yoke 23 is set horizontally, the first core column 41 and the second core column 42 are both set vertically, the protrusion 43 is fitted with the recessed part 45, and the first oblique cut part 44 is attached to the second oblique cut part 46.
[0025] According to the above structure, when the core assembly 24 and the core yoke 23 are combined, the protrusion 43 and the recess 45 fit together, and the first oblique cut 44 and the second oblique cut 46 fit together, making it easy for the core yoke 23 and the core assembly 24 to fit together tightly. When replacing the coil 25, during the process of restoring the transformer 20, it is necessary to reassemble the core yoke 23 and the core assembly 24. When the core yoke 23 and the core assembly 24 approach each other, the protrusion 43 and the recess 45 approach each other, and the first oblique cut 44 and the second oblique cut 46 fit together. As the recessed portion 45 and the protruding portion 43 fit together, the first oblique cut portion 44 and the second oblique cut portion 46 fit together, reducing the possibility of excessive offset between the core yoke 23 and the core assembly 24 during the process of approaching each other. Until the protruding portion 43 is embedded in the recessed portion 45 and the first oblique cut portion 44 and the second oblique cut portion 46 fit together, it is convenient for the core yoke 23 and the core assembly 24 to be aligned and positioned with each other, making the process of assembling the core yoke 23 and the core assembly 24 more precise, thereby improving the accuracy of replacing the coil 25 on site.
[0026] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the two second iron core posts 42 are symmetrically arranged, and the first oblique cut portion 44 faces the side closer to the first iron core post 41.
[0027] It should be noted that the two second iron core posts 42 are symmetrically arranged with the first iron core post 41 as the center, the first oblique cut 44 is an inclined surface, and the angle between the first oblique cut 44 and the horizontal plane is equal to the angle between the second oblique cut 46 and the horizontal plane.
[0028] According to the above structure, when the core yoke 23 and the core assembly 24 are reassembled, as the core yoke 23 and the core assembly 24 approach each other, the first oblique cut 44 faces the side closer to the first core post 41, which prevents the second oblique cut 46 on the core yoke 23 from moving outward, thereby facilitating the alignment and positioning of the core yoke 23 and the core assembly 24.
[0029] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the two core yokes 23 are symmetrically arranged, and the recessed portion 45 is located on the side of the core yoke 23 closer to the core assembly 24.
[0030] It should be noted that the two iron core yokes 23 are arranged symmetrically, that is, the recessed part 45 of the upper iron core yoke 23 faces downward, and the recessed part 45 of the lower iron core yoke 23 faces upward.
[0031] According to the above structure, when the core yoke 23 and the core assembly 24 are combined, since the two core yokes 23 are symmetrically arranged, the recesses 45 on the two core yokes 23 are all facing the first core post 41. As the core yoke 23 and the core assembly 24 approach each other, the protrusions 43 can be inserted into the recesses 45, so that the core yoke 23 and the core assembly 24 can be aligned and positioned with each other.
[0032] like Figure 7 As shown, the protrusion 43 has a first wedge-shaped surface 47 on both sides, and the recess 45 has a second wedge-shaped surface 48 on both sides, with the first wedge-shaped surface 47 and the second wedge-shaped surface 48 fitting together.
[0033] It should be noted that both the first wedge surface 47 and the second wedge surface 48 are inclined slopes, and the angle between the first wedge surface 47 and the horizontal plane is equal to the angle between the second wedge surface 48 and the horizontal plane. The two first wedge surfaces 47 on the protrusion 43 form a protruding "A" shape, and the two second wedge surfaces 48 on the recess 45 form a recessed "V" shape.
[0034] According to the above structure, during the assembly of the core yoke 23 and the core assembly 24, the protruding protrusion 43 and the recessed concave portion 45 interlock, causing the first wedge-shaped surface 47 to prevent the core yoke 23 from shifting to both sides, and the second wedge-shaped surface 48 to prevent the first core column 41 from shifting to both sides. When the core yoke 23 and the core assembly 24 are assembled, the first wedge-shaped surface 47 and the second wedge-shaped surface 48 are in close contact, reducing the possibility of loosening between the first core column 41 and the core yoke 23, and improving the stability of the assembly of the core yoke 23 and the core assembly 24.
[0035] like Figure 4 and Figure 5 As shown, a number of first connecting plates 51 are fixedly connected to the iron core assembly 24. Each of the two ends of the first connecting plate 51 is provided with a first connecting hole 52. Both the lower clamp 21 and the upper clamp 22 are provided with a number of second connecting holes 53. A first connecting bolt 54 is detachably connected between the first connecting hole 52 and the second connecting hole 53.
[0036] It should be noted that there are six first connecting plates 51, that is, one first connecting plate 51 is provided on both sides of the first iron core column 41 and the second iron core column 42. The first connecting bolt 54 is existing technology. The first connecting plate 51 and the lower clamp 21 are detachably connected together through the first connecting hole 52, the second connecting hole 53 and the first connecting bolt 54. The first connecting plate 51 and the upper clamp 22 are detachably connected together through the first connecting hole 52, the second connecting hole 53 and the first connecting bolt 54. This will not be described in detail here.
[0037] According to the above structure, when it is necessary to separate the core assembly 24 from the upper clamp 22, the first connecting bolt 54 is removed from the first connecting hole 52 and the second connecting hole 53 on the upper clamp 22, thereby disconnecting the connection between the first connecting plate 51 and the upper clamp 22, and thus disconnecting the connection between the core assembly 24 and the upper clamp 22, so as to facilitate the replacement of the coil 25 from the top of the core assembly 24. When it is necessary to separate the core assembly 24 from the lower clamp 21, the first connecting bolt 54 is removed from the first connecting hole 52 and the second connecting hole 53 on the lower clamp 21, thereby disconnecting the connection between the first connecting plate 51 and the lower clamp 21, and thus disconnecting the connection between the core assembly 24 and the lower clamp 21, so as to facilitate the replacement of the coil 25 from the bottom of the core assembly 24.
[0038] like Figure 4 and Figure 5 As shown, both the lower clamp 21 and the upper clamp 22 are provided with several third connecting holes 61. Several second connecting plates 62 are fixedly connected to the outside of the iron core yoke 23. Several fourth connecting holes 63 are provided on the second connecting plates 62. Second connecting bolts 64 are detachably connected between the third connecting holes 61 and the fourth connecting holes 63.
[0039] It should be noted that there are eight second connecting plates 62, that is, two second connecting plates 62 are provided on both sides of each core yoke 23. The second connecting bolts 64 are existing technology. The second connecting plates 62 and the lower clamping member 21 are detachably connected together through the third connecting hole 61, the fourth connecting hole 63 and the second connecting bolts 64. The second connecting plates 62 and the upper clamping member 22 are detachably connected together through the third connecting hole 61, the fourth connecting hole 63 and the second connecting bolts 64. This will not be described in detail here.
[0040] According to the above structure, when it is necessary to separate the core yoke 23 from the upper clamp 22, the second connecting bolt 64 is removed from the fourth connecting hole 63 and the third connecting hole 61 on the upper clamp 22, thereby detaching the connection between the second connecting plate 62 and the upper clamp 22, and thus separating the core yoke 23 from the upper clamp 22. When it is necessary to separate the core yoke 23 from the lower clamp 21, the second connecting bolt 64 is removed from the fourth connecting hole 63 and the third connecting hole 61 on the lower clamp 21, thereby detaching the connection between the second connecting plate 62 and the lower clamp 21. This disconnects the core yoke 23 from the lower clamp 21, allowing the core yoke 23 and the lower clamp 21 to be separated. This connection method between the core yoke 23, the lower clamp 21, and the upper clamp 22 not only makes the core yoke 23, the lower clamp 21, and the upper clamp 22 a separate design for easy replacement, but also facilitates the connection of the working end of the lifting assembly 32 with the upper clamp 22 during the lifting process of the lifting mechanism 30 to the transformer 20, rather than directly hooking the core yoke 23 for lifting. This avoids direct contact between the lifting mechanism 30 and the core yoke 23 during lifting, thus reducing the possibility of damage to the core yoke 23.
[0041] like Figure 9 As shown, a number of electric telescopic cylinders 71 are provided between the lower clamp 21 and the upper clamp 22. The electric telescopic cylinders 71 are fixedly connected to the lower clamp 21, and the output end of the electric telescopic cylinders 71 is fixedly connected to the upper clamp 22.
[0042] It should be noted that the electric telescopic cylinder 71 is existing technology, used to convert the rotational motion of the drive motor into linear motion so that the output end can extend or retract, which will not be elaborated here.
[0043] According to the above structure, when it is necessary to increase the distance between the lower clamp 21 and the upper clamp 22, the output end of the electric telescopic cylinder 71 extends after it works, causing the upper clamp 22 to move away from the lower clamp 21, thereby increasing the distance between the lower clamp 21 and the upper clamp 22 so that the core yoke 23 and the core assembly 24 can be separated. When it is necessary to decrease the distance between the lower clamp 21 and the upper clamp 22, the output end of the electric telescopic cylinder 71 shortens after it works, causing the upper clamp 22 to move closer to the lower clamp 21, thereby decreasing the distance between the lower clamp 21 and the upper clamp 22 so that the core yoke 23 and the core assembly 24 can move closer to each other and be combined together.
[0044] like Figure 9 As shown, there are two electric telescopic cylinders 71, and the two electric telescopic cylinders 71 are located at both ends of the lower clamp 21.
[0045] It should be noted that the two electric telescopic cylinders 71 are identical in specifications and are symmetrically arranged.
[0046] According to the above structure, during the process of adjusting the distance between the lower clamp 21 and the upper clamp 22, the output ends of the two electric telescopic cylinders 71 respectively set at both ends of the lower clamp 21 extend or shorten synchronously, which makes it easier for the lower clamp 21 and the upper clamp 22 to remain parallel, improves the stability of the process of adjusting the distance between the lower clamp 21 and the upper clamp 22, and reduces the tilting of the core yoke 23 during the combination of the core yoke 23 and the core assembly 24, thereby improving the stability of the combination of the core yoke 23 and the core assembly 24.
[0047] To enable those skilled in the art to further understand the field replacement coil system for wind power nacelles of the present invention, the present invention also provides a method for using the field replacement coil system for wind power nacelles. This method utilizes the aforementioned field replacement coil system for wind power nacelles, and the specific method is as follows: S1: First, connect the working end of the lifting assembly 32 to the upper clamp 22. After the lifting assembly 32 is working, it drives the transformer 20 to rise through the upper clamp 22. S2: When it is necessary to replace the coil 25 from the top, the upper clamp 22 and the iron core assembly 24 are disassembled. The lower clamp 21 slides relative to the upper clamp 22 and moves away from each other, so that the iron core assembly 24 is disengaged from the iron core yoke 23 of the upper clamp 22, so that the old coil 25 can be removed from the top of the iron core assembly 24. The new coil 25 is installed on the iron core assembly 24. The lower clamp 21 slides relative to the upper clamp 22 and moves closer to each other, so that the upper clamp 22 and the iron core assembly 24 are installed together. S3: When it is necessary to replace the coil 25 from below, the lower clamp 21 and the core assembly 24 are disassembled. The lower clamp 21 and the upper clamp 22 slide relative to each other and move away from each other, so that the core assembly 24 is disengaged from the core yoke 23 of the lower clamp 21, so that the old coil 25 can be removed from below the core assembly 24. The new coil 25 is installed on the core assembly 24. The lower clamp 21 and the upper clamp 22 slide relative to each other and move closer to each other, so that the lower clamp 21 and the core assembly 24 are installed together. S4: After the lifting assembly 32 starts working, it drives the transformer 20 to the bottom of the transformer box 10 through the upper clamp 22, disconnecting the connection between the working end of the lifting assembly 32 and the upper clamp 22, thereby realizing the replacement of the coil 25.
[0048] The working principle of this invention is as follows: The hoisting mechanism 30 lifts the transformer 20 through the lifting assembly 32, increasing the height of the transformer 20 to provide operating space for replacing the coil 25. The core assembly 24 is then disassembled from the upper clamp 22 or the lower clamp 21. After the upper clamp 22 slides along the lower clamp 21, the distance between the lower clamp 21 and the upper clamp 22 increases, thereby disengaging the core assembly 24 from the upper clamp 22 or the lower clamp 21. When the core assembly 24 is disengaged from the upper clamp 22, it also disengages from the core yoke 23 on the upper clamp 22, facilitating the replacement of the coil 25 from above the core assembly 24. When the core assembly 24 disengages from the lower clamp 21, it also disengages from the core yoke 23 on the lower clamp 21, facilitating the replacement of the coil 25 from below the core assembly 24. Compared with existing technologies, the process of replacing the coil 25 does not require the entire transformer 20 to be removed or disassembled, improving the convenience of replacing the coil 25 on-site. Furthermore, during the resetting of the core yoke 23 and the core assembly 24, the interlocking of the core yoke 23 and the core assembly 24 facilitates their alignment and positioning when they are close together, thereby improving the accuracy of replacing the coil 25 on-site.
[0049] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.
Claims
1. A field-replacement coil system for a wind power nacelle transformer, characterized in that, include: Transformer housing (10); A transformer (20) is installed inside a transformer housing (10). The transformer (20) includes a lower clamp (21) installed inside the transformer housing (10). An upper clamp (22) is slidably installed above the lower clamp (21). Iron core yokes (23) are fixedly connected to both the lower clamp (21) and the upper clamp (22). An iron core assembly (24) is provided between the two iron core yokes (23). The lower clamp (21) and the upper clamp (22) are detachably connected to the iron core assembly (24). The upper and lower ends of the iron core assembly (24) are respectively fitted with the two iron core yokes (23). A coil (25) is detachably connected to the iron core assembly (24). The hoisting mechanism (30) is located inside the transformer box (10). The hoisting mechanism (30) includes a hoisting frame (31) located inside the transformer box (10). A lifting assembly (32) is installed on the hoisting frame (31). The working end of the lifting assembly (32) is detachably connected to the upper clamp (22). After the lifting assembly (32) is working, the height of the transformer (20) is adjusted by the upper clamp (22). After the lower clamp (21) and the upper clamp (22) are separated from the core assembly (24), the lower clamp (21) and the upper clamp (22) slide relative to each other, causing the core yoke (23) to separate from the core assembly (24).
2. The wind power generation nacelle field coil replacement system according to claim 1, characterized in that: The core assembly (24) includes a first core post (41) located in the middle and two second core posts (42) located on both sides. The first core post (41) and the two second core posts (42) are arranged along the same horizontal straight line. Both ends of the first core post (41) are provided with protrusions (43). Both ends of the second core post (42) are provided with first oblique cuts (44). The core yoke (23) is provided with recesses (45). The recesses (45) are fitted with the protrusions (43). Both ends of the core yoke (23) are provided with second oblique cuts (46). The second oblique cuts (46) are fitted with the first oblique cuts (44).
3. The field replacement coil system for wind power generation nacelles according to claim 2, characterized in that: The two second iron core posts (42) are arranged symmetrically, and the first oblique cut (44) faces the side closer to the first iron core post (41).
4. The field replacement coil system for wind power generation nacelle according to claim 2, characterized in that: The two core yokes (23) are symmetrically arranged, and the recess (45) is located on the side of the core yoke (23) close to the core assembly (24).
5. The field replacement coil system for wind power generation nacelles according to claim 2, characterized in that: The protrusion (43) is provided with a first wedge-shaped surface (47) on both sides, and the recess (45) is provided with a second wedge-shaped surface (48) on both sides, and the first wedge-shaped surface (47) and the second wedge-shaped surface (48) fit together.
6. The field replacement coil system for wind power generation nacelles according to claim 1, characterized in that: The core assembly (24) is fixedly connected with several first connecting plates (51), and each of the two ends of the first connecting plate (51) is provided with a first connecting hole (52). The lower clamp (21) and the upper clamp (22) are provided with several second connecting holes (53). The first connecting hole (52) and the second connecting hole (53) are detachably connected with a first connecting bolt (54).
7. The field replacement coil system for wind power generation nacelle according to claim 1, characterized in that: Both the lower clamp (21) and the upper clamp (22) are provided with a number of third connecting holes (61). A number of second connecting plates (62) are fixedly connected to the outer side of the iron core yoke (23). A number of fourth connecting holes (63) are provided on the second connecting plates (62). A second connecting bolt (64) is detachably connected between the third connecting holes (61) and the fourth connecting holes (63).
8. The field replacement coil system for wind power generation nacelles according to claim 1, characterized in that: A plurality of electric telescopic cylinders (71) are provided between the lower clamp (21) and the upper clamp (22). The electric telescopic cylinders (71) are fixedly connected to the lower clamp (21), and the output end of the electric telescopic cylinders (71) is fixedly connected to the upper clamp (22).
9. The field replacement coil system for wind power generation nacelle according to claim 8, characterized in that: Two electric telescopic cylinders (71) are provided, and the two electric telescopic cylinders (71) are located at both ends of the lower clamp (21).
10. A method for on-site replacement of coils in a wind power generation nacelle transformer, characterized in that: The specific method for using the wind power generation nacelle transformer field replacement coil system according to any one of claims 1 to 9 is as follows: S1: First, connect the working end of the lifting assembly (32) to the upper clamp (22). After the lifting assembly (32) works, it drives the transformer (20) to rise through the upper clamp (22). S2: When it is necessary to replace the coil (25) from above, the upper clamp (22) and the core assembly (24) are disassembled. The lower clamp (21) slides away from the upper clamp (22) and moves away from each other, so that the core assembly (24) is separated from the core yoke (23) of the upper clamp (22) and the old coil (25) is removed from the top of the core assembly (24). The new coil (25) is installed on the core assembly (24). The lower clamp (21) slides away from the upper clamp (22) and moves closer to each other, so that the upper clamp (22) and the core assembly (24) are installed together. S3: When it is necessary to replace the coil (25) from below, the lower clamp (21) and the core assembly (24) are disassembled. The lower clamp (21) and the upper clamp (22) slide relative to each other and move away from each other, so that the core assembly (24) and the core yoke (23) of the lower clamp (21) are separated, so that the old coil (25) can be removed from the bottom of the core assembly (24). The new coil (25) is installed on the core assembly (24). The lower clamp (21) and the upper clamp (22) slide relative to each other and move closer to each other, so that the lower clamp (21) and the core assembly (24) are installed together. S4: After the lifting assembly (32) is working, it drives the transformer (20) to descend to the bottom of the transformer box (10) through the upper clamp (22), disconnecting the connection between the working end of the lifting assembly (32) and the upper clamp (22), thereby realizing the replacement of the coil (25).