A kind of whole disassembly-free wind turbine cabinet body heat dissipation structure scheme

Abstract

The present application relates to the technical field of wind turbine, and discloses a scheme for heat dissipation structure of wind turbine cabinet without overall disassembly, comprising the following steps: safety isolation; stopping the wind turbine, cutting off the high-voltage power supply, and disconnecting the control line of the heat dissipation fan; hole machining; positioning the projection area of the heat dissipation fan on the wind turbine cabinet and cutting out a maintenance window matched with the projection area, then opening a first mounting hole around the maintenance window; sealing plate machining; machining a maintenance sealing plate in the factory, preassembling the heat dissipation fan on the maintenance sealing plate, and opening a second mounting hole on the maintenance sealing plate; sealing plate installation; connecting the internal components of the wind turbine with the heat dissipation fan preassembled on the maintenance sealing plate through the maintenance window, then covering the maintenance sealing plate to the maintenance window, and fixing the maintenance sealing plate on the maintenance window by inserting the mounting member into the first mounting hole and the second mounting hole; the present application has the advantages of shortening the maintenance time, reducing the difficulty of maintenance, and avoiding the problem of too long downtime of the unit.

Description

Technical Field

[0001] This invention relates to a solution for a heat dissipation structure of a wind turbine cabinet that does not require complete disassembly, and belongs to the technical field of wind turbines. Background Technology

[0002] The nacelle inverter cabinet is one of the core electrical devices in a wind turbine generator set, located inside the nacelle. Its main function is to efficiently convert captured wind energy (mechanical energy) into grid-compatible electrical energy. Currently, most nacelle inverter cabinets use built-in integrated heat exchanger cooling fans. These fans offer high cooling efficiency and precise temperature control, effectively dissipating heat from the inverter cabinet. However, they are susceptible to damage from vibrations, dust, and other environmental factors within the nacelle. Current maintenance solutions involve disassembling the entire unit and removing the cooling fans. This requires disconnecting the high-voltage power supply, dismantling the high-voltage copper plates and numerous internal cables. This process is not only difficult in terms of fastener removal and assembly, and cumbersome, but also poses safety hazards such as electric shock and cable damage. Furthermore, it results in lengthy maintenance times and significant downtime losses for the turbine.

[0003] In the prior art, Chinese patent application number CN202310382750.9 discloses an integrated heat exchange nacelle cover and a wind turbine heat dissipation system. It utilizes the large surface area of ​​the nacelle cover and sets external heat dissipation pipes on the outer surface of the nacelle cover to improve heat dissipation efficiency and reduce the use of cooling fans. This can reduce the probability of cooling fan failure in the wind turbine and thus minimize the losses caused by the unit's maintenance shutdown.

[0004] However, in actual use, it has the following problems: The above solution only reduces the use of cooling fans by setting up additional heat dissipation structures. It does not actually solve the problems of complicated maintenance and significant safety hazards after the cooling fan fails. In addition, the setting of internal and external heat dissipation pipes will further increase the complexity of the internal environment of the inverter cabinet, making the operation more complicated when the cooling fan fails and needs maintenance. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this invention provides a solution for a wind turbine cabinet heat dissipation structure that eliminates the need for complete disassembly.

[0006] The technical solution of the present invention is as follows: A solution for a wind turbine cabinet heat dissipation structure that does not require complete disassembly includes the following steps: Step S1: Safety isolation; shut down the wind turbine and lock the rotating parts on the back of the wind turbine cabinet, cut off the high-voltage power supply inside the cabinet, and disconnect the control line of the cooling fan inside the cabinet; Step S2: Hole drilling; Locate the projection area of ​​the cooling fan on the wind turbine cabinet and cut out an inspection window that matches the projection area, then drill the first mounting hole around the inspection window; Step S3: Panel fabrication; A maintenance panel that can cover the inspection window is fabricated in the factory, a cooling fan is pre-installed on the maintenance panel, and a second mounting hole that matches the first mounting hole is opened on the maintenance panel; Step S4: Install the maintenance cover; connect the internal components of the wind turbine to the cooling fan pre-installed on the maintenance cover through the inspection window, then cover the inspection window with the maintenance cover, and fix the maintenance cover on the inspection window by inserting the mounting parts into the first mounting hole and the second mounting hole.

[0007] Furthermore, the maintenance window is located on the wind turbine cabinet at the cabinet position behind the cooling fan.

[0008] Furthermore, the solution also includes the following steps: Step S5: Overall machine debugging; test the operation of the cooling fan and the heat dissipation temperature inside the wind turbine cabinet to verify that the heat dissipation function is normal.

[0009] Furthermore, the first mounting hole is a threaded hole structure, the second mounting hole is a countersunk hole structure, and the mounting component is a screw component. After the maintenance cover plate covers the inspection window, the mounting component first passes through the second mounting hole and then locks into the first mounting hole to fix the maintenance cover plate on the inspection window.

[0010] Furthermore, step S2 also includes the following structure: After cutting out the maintenance window, the edge of the maintenance window is bent to make it concave relative to the surface of the wind turbine cabinet, thus forming a concave placement structure on the wind turbine cabinet.

[0011] Furthermore, step S3 also includes the following steps: When processing the maintenance sealing plate, the size of the maintenance sealing plate should be such that it can be placed into the placement structure, and there should be installation space between it and the surrounding side wall of the placement structure. The thickness of the maintenance sealing plate should be such that it does not exceed the setting of the placement structure after being placed in it.

[0012] Furthermore, a sealing frame is placed within the installation space. After the maintenance sealing plate is placed in the placement structure, it is located inside the sealing frame and is tightly fitted to the sealing frame. The sealing frame is bonded to the peripheral sidewall of the placement structure with sealant. A first sealing block is provided on the sidewall of the sealing frame close to the fan unit cabinet. A first sealing groove matching the first sealing block is provided on the fan unit cabinet. When the sealing frame is placed in the installation space, the first sealing block is inserted into the first sealing groove.

[0013] Furthermore, a second sealing block is provided on the side wall of the sealing frame close to the maintenance sealing plate, and a second sealing groove matching the second sealing block is provided on the maintenance sealing plate. When the maintenance sealing plate is inside the sealing frame and is tightly attached to the sealing frame, the second sealing block is inserted into the second sealing groove.

[0014] Furthermore, the first mounting hole is a straight hole structure, the second mounting hole is a countersunk hole structure, and a mating component is also fixedly installed in the first mounting hole. The mounting component first passes through the second mounting hole and then enters the first mounting hole to fix and engage with the mating component to fix the maintenance cover plate on the inspection window.

[0015] Furthermore, the mating component includes a mating cylinder, which is fixed in the first mounting hole. An insertion groove extending along the length of the mating cylinder is provided at the end position close to the second mounting hole. The insertion groove is provided on the inner wall of the mating cylinder. A fixing groove with an annular structure is also provided on the inner wall of the mating cylinder. The insertion groove and the fixing groove are connected. A limiting block blocking the fixing groove is also provided in the fixing groove. The mounting components include a rubber head and a plug-in post, which are bonded together. A clamping screw block is threaded into the rubber head through a threaded groove. A plug-in block is provided on the side wall of the plug-in post, and the size of the plug-in block is set to allow it to move between the plug-in groove and the fixing groove. The method for fixing the mounting part and the mating part includes the following steps: the mounting part is first passed through the second mounting hole and then into the first mounting hole. During this process, the plug-in post is inserted into the mating cylinder located in the first mounting hole after passing through the second mounting hole. During the insertion of the plug-in post into the mating cylinder, the plug-in block slides along the plug-in groove. After the plug-in block slides to the fixed groove position, the plug-in block can no longer move along the plug-in groove. At this time, the rubber head is located in the countersunk structure of the second mounting hole. After this, the mounting part rotates, causing the plug-in block to rotate along the fixed groove so that its projection with the plug-in groove does not overlap and it abuts against the limiting block. Then, the clamping screw is rotated so that it rotates relative to the rubber head, causing the clamping screw to squeeze the rubber head, thereby increasing the friction between the rubber head and the countersunk structure of the second mounting hole.

[0016] The present invention has the following beneficial effects: This invention involves cutting an inspection window into the wind turbine cabinet to match the projection area of ​​the cooling fan, and creating first mounting holes around the inspection window. Simultaneously, a maintenance cover plate is fabricated in the factory to cover the inspection window. The cooling fan is pre-installed on the maintenance cover plate, and a second mounting hole is created on the maintenance cover plate. The cooling fan is then installed inside the wind turbine cabinet via the inspection window, connecting to the cooling fan control lines and water-cooled heat exchanger within the wind turbine cabinet. Finally, the inspection window is secured to the wind turbine cabinet using mounting components inserted into the first and second mounting holes. This new technology avoids most of the cables and other components inside the wind turbine cabinet. When the cooling fan needs to be replaced due to a malfunction, there is no need to disassemble the high-voltage copper plate and the entire heat exchanger. Simply remove the maintenance cover and disconnect the cooling fan from the internal components of the wind turbine through the inspection window. This allows for the replacement of the cooling fan. Compared to existing technologies, the cooling fan replacement and maintenance time can be reduced by 90%, and the maintenance difficulty of replacing the cooling fan can be greatly reduced. This technology has the advantages of shortening maintenance time, reducing maintenance difficulty, avoiding the risk of electric shock, and avoiding excessive downtime of the unit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the maintenance sealing plate installed on the inspection window in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the inspection window structure in Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the structure of the maintenance sealing plate installed on the inspection window in Embodiment 2 of the present invention; Figure 5 for Figure 3 Enlarged view of point A in the image; Figure 6 for Figure 4 Enlarged view of point B in the image; Figure 7 This is a schematic diagram of the structure of the maintenance sealing plate installed on the inspection window in Embodiment 3 of the present invention; Figure 8 for Figure 7 Enlarged view of point C in the image; Figure 9 for Figure 8 AA section view in the image.

[0018] The reference numerals in the figure are as follows: 1. Wind turbine cabinet; 2. Inspection window; 3. First mounting hole; 4. Maintenance cover plate; 5. Second mounting hole; 6. Mounting component; 7. Placement structure; 8. Installation space; 9. Sealing frame; 10. Sealing adhesive; 11. First sealing block; 12. First sealing groove; 13. Second sealing block; 14. Second sealing groove; 15. Mating cylinder; 16. Insertion groove; 17. Fixing groove; 18. Limiting block; 19. Rubber head; 20. Insertion post; 21. Threaded groove; 22. Clamping screw block; 23. Insertion block. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: Please refer to Figure 1 and Figure 2 This embodiment provides a solution for eliminating the need for complete disassembly of the heat dissipation structure of the wind turbine cabinet 1. This solution addresses the problem of cumbersome, time-consuming, and costly downtime caused by the need to completely disassemble the heat exchanger, disconnect the 620V high-voltage copper plate and numerous cables when the cooling fan in the WT1500 wind turbine nacelle 300 inverter cabinet fails. The solution includes the following steps: The first step is to isolate the wind turbine; shut down the wind turbine unit and lock the rotating parts on the back of the wind turbine unit cabinet 1, disconnect the 620V high-voltage power supply inside the cabinet, disconnect the control line of the cooling fan inside the cabinet, and mark the pipelines to facilitate subsequent wiring work.

[0021] The second step is hole drilling. The projection area of ​​the cooling fan is located on the wind turbine cabinet 1, and a maintenance window 2 matching the projection area is cut out. Specifically, the maintenance window 2 is located on the back of the cooling fan on the wind turbine cabinet 1. Because the front of the cooling fan mainly contains various components inside the wind turbine cabinet 1, such as the main power cable, while the back area is mostly free of components, the maintenance window 2 is located on the back of the cooling fan. Next, first mounting holes 3 are drilled around the maintenance window 2 on the wind turbine cabinet 1. The first mounting holes 3 are threaded holes. The specific number and distribution of the first mounting holes 3 can be adjusted according to actual conditions and are not limited here.

[0022] The third step is the fabrication of the maintenance cover plate. A maintenance cover plate 4, capable of covering the inspection window 2, is fabricated in the factory. A cooling fan is pre-installed on the maintenance cover plate 4, and the method of mounting the cooling fan to the maintenance cover plate 4 is determined according to the specific connection structure of the cooling fan. Then, second mounting holes 5 are made on the maintenance cover plate 4, corresponding one-to-one with and matching the first mounting holes 3. The second mounting holes 5 are countersunk holes.

[0023] The fourth step is the installation of the maintenance cover plate. Through the inspection window 2, connect the internal components of the wind turbine, such as the control wires for the cooling fan inside the cabinet and the water-cooled heat exchanger, to the cooling fan pre-installed on the maintenance cover plate 4. Then, cover the inspection window 2 with the maintenance cover plate 4, align the first mounting hole 3 with the corresponding second mounting hole 5, and insert the mounting piece 6 into the first mounting hole 3 and the second mounting hole 5 to fix the maintenance cover plate 4 onto the inspection window 2. The mounting piece 6 is a screw; after the maintenance cover plate 4 is placed over the inspection window 2, the mounting piece 6 first passes through the second mounting hole 5 and then locks into the first mounting hole 3 to fix the maintenance cover plate 4 onto the inspection window 2.

[0024] Step 5: Overall machine debugging; Manually turn on the cooling fan and the corresponding water-cooled heat exchanger on the control panel, test the operation of the cooling fan and the heat dissipation temperature inside the fan turbine cabinet 1, and verify that the heat dissipation function is normal.

[0025] This embodiment involves cutting an inspection window 2 on the wind turbine cabinet 1 to match the projection area of ​​the cooling fan, and creating first mounting holes 3 around the inspection window 2. Simultaneously, a maintenance cover plate 4 is fabricated in the factory to cover the inspection window 2. The cooling fan is pre-installed on the maintenance cover plate 4, and a second mounting hole 5 is created on the maintenance cover plate 4. The cooling fan is then installed inside the wind turbine cabinet via the inspection window 2, connecting to the cooling fan control lines and water-cooled heat exchanger within the wind turbine cabinet. The inspection window 2 is then fixed in place by inserting mounting pieces 6 through the first and second mounting holes 3 and 5. This design avoids most cables and other components inside the wind turbine cabinet. When the cooling fan needs to be replaced due to a subsequent malfunction, it is not necessary to disassemble the high-voltage copper plate and the entire heat exchanger. Simply remove the maintenance cover plate 4 and disconnect the cooling fan from the internal components of the wind turbine via the inspection window 2 for replacement. Compared to current maintenance methods, this approach offers the following advantages: 1. It does not damage the original water-cooled heat exchange air duct, and the heat dissipation performance is consistent with the original factory; 2. The entire process does not require disassembly of the high-voltage circuit, which can not only significantly reduce the risk of high-voltage operation and shorten the downtime for maintenance, but also avoid secondary faults caused by repeated disassembly and reassembly of cables and copper plates, reduce maintenance manpower and power generation losses, and is suitable for the long-term stable operation of old units. 3. When replacing the cooling fan later, only the maintenance cover plate 4 needs to be removed and installed, which can save 90% of the maintenance time.

[0026] In the solution provided in Embodiment 1, the maintenance cover 4 is protruding from the wind turbine cabinet 1. This could lead to collisions with maintenance personnel when entering or exiting, posing a certain risk. Furthermore, the solution in Embodiment 1 lacks a sealing structure between the maintenance cover 4 and the inspection window 2, allowing external dust, moisture, and other interfering factors to enter the wind turbine cabinet 1 and affect the operation of the components inside. To address this issue, Embodiment 2 is proposed based on Embodiment 1.

[0027] Example 2: Please refer to Figures 3-6 This embodiment provides a solution for the heat dissipation structure of the wind turbine cabinet 1 without the need for complete disassembly, including all the steps in Embodiment 1. Furthermore, the hole-making step also includes the following structure: After cutting out the inspection window 2, bending tools such as a manual bending machine are used to bend the four edges of the inspection window 2. Specifically, the edges are first bent vertically inward, and then some edges are bent horizontally outward, so that they are concave relative to the surface of the wind turbine cabinet 1, thus forming a concave placement structure 7 on the wind turbine cabinet.

[0028] The sealing process also includes the following steps: When processing the maintenance sealing plate 4, the size of the maintenance sealing plate 4 is sufficient to be placed in the placement structure 7 and cover the inspection window 2, and there is an installation space 8 between it and the peripheral side wall of the placement structure 7. The installation space 8 is set for the subsequent installation of the required sealing components. The thickness of the maintenance sealing plate 4 is sufficient to ensure that it does not protrude from the placement structure 7 after being placed in the placement structure 7, so that the maintenance sealing plate 4 does not protrude from the wind turbine cabinet 1 after being placed in the placement structure 7, thereby effectively avoiding collisions with it when maintenance personnel enter and exit.

[0029] A sealing frame 9 is placed within the installation space 8. After the placement structure 7 is formed, the periphery of the sealing frame 9 is bonded to the periphery of the placement structure 7 using sealant 10. A first sealing block 11 is fixedly installed on the side wall of the sealing frame 9 closest to the fan unit cabinet. A first sealing groove 12 matching the first sealing block 11 is provided on the fan unit cabinet. When the sealing frame 9 is placed within the installation space 8, the first sealing block 11 is inserted into the first sealing groove 12. When the maintenance sealing plate 4 is placed in the placement structure 7 to cover the inspection window 2, it is inside the sealing frame 9 and is tightly fitted to the sealing frame 9. A second sealing block 13 is also fixedly installed on the side wall of the sealing frame 9 closest to the maintenance sealing plate 4. A second sealing groove 14 matching the second sealing block 13 is provided on the maintenance sealing plate 4. When the maintenance sealing plate 4 is inside the sealing frame 9 and tightly fitted to the sealing frame 9, the second sealing block 13 is inserted into the second sealing groove 14.

[0030] With the aforementioned configuration, the sealing frame 9, in conjunction with the first sealing block 11, the first sealing groove 12, the second sealing block 13, and the second sealing groove 14, can effectively prevent external dust, moisture, and other interference factors from entering the wind turbine cabinet 1 when the maintenance sealing plate 4 covers the inspection window 2 and is fixed to the wind turbine cabinet 1. This makes it difficult for the modified wind turbine cabinet 1 to experience air leakage, and the internal heat dissipation temperature fluctuation is ≤2℃. It also effectively slows down the aging rate of high-voltage components, thereby significantly improving the safety factor and operational stability of the wind turbine.

[0031] The screw mounting part 6 and the first mounting hole 3 of the threaded hole structure require the operator to continuously rotate the mounting part 6 many times to press it firmly against the maintenance cover plate 4 when installing the maintenance cover plate 4 onto the wind turbine cabinet 1. This process is time-consuming and requires a lot of physical effort from the operator. To solve this problem, an embodiment 3 is proposed based on embodiment 2.

[0032] Example 3: Please refer to Figures 7-9 This embodiment provides a solution for the heat dissipation structure of the wind turbine cabinet 1 without the need for overall disassembly. The difference between this embodiment and the second embodiment is that the structures of the first mounting hole 3 and the mounting component 6 are different.

[0033] In this embodiment, the first mounting hole 3 is a straight hole structure, the second mounting hole 5 is a countersunk hole structure, and a mating part is also fixedly installed in the first mounting hole 3. The mounting part 6 first passes through the second mounting hole 5 and then passes through the first mounting hole 3 to fix and cooperate with the mating part to fix the maintenance sealing plate 4 on the inspection window 2.

[0034] In this embodiment, the mating component includes a mating cylinder 15, which is welded into the first mounting hole 3 and is coaxially arranged with the first mounting hole 3. An insertion groove 16 extending along the length of the mating cylinder 15 is formed at the end of the mating cylinder 15 near the second mounting hole 5. The insertion groove 16 is formed on the inner wall of the mating cylinder 15 and is symmetrically arranged on the inner wall of the mating cylinder 15. A fixing groove 17 with an annular structure is also formed on the inner wall of the mating cylinder 15, and is coaxially arranged with the mating cylinder 15. The fixing groove 17 is specifically located near the middle of the mating cylinder 15. Both insertion grooves 16 on both sides extend along the length of the mating cylinder 15 and are connected to the fixing groove 17. A limiting block 18 for blocking the fixing groove 17 is also fixedly arranged within the fixing groove 17, and the limiting blocks 18 are symmetrically arranged within the fixing groove 17.

[0035] Mounting component 6 includes a rubber head 19 and a plug-in post 20, which are bonded together. The contact area between the rubber head 19 and the plug-in post 20 can be increased by providing structures such as mating blocks and mating grooves to ensure the strength of their bond. A clamping screw block 22 is threaded into the rubber head 19 via a threaded groove 21. Plug-in blocks 23 are provided on the side wall of the plug-in post 20, symmetrically arranged and matching the distribution of the plug-in grooves 16. The size of the plug-in blocks 23 is designed to allow them to move within the plug-in grooves 16 and the fixing grooves 17.

[0036] With the aforementioned setup, the method for fixing the mounting component 6 to the mating component includes the following steps: the mounting component 6 is first passed through the second mounting hole 5 and then inserted into the first mounting hole 3. During this process, the insertion post 20 passes through the second mounting hole 5 and is inserted into the mating cylinder 15 located in the first mounting hole 3. As the insertion post 20 is inserted into the mating cylinder 15, the insertion blocks 23 on both sides are inserted into the corresponding side insertion grooves 16 and slide along the length of the insertion grooves 16. After the insertion blocks 23 slide to the position of the fixing groove 17, the insertion blocks 23 contact the fixing groove 17 and cannot move forward, so that the insertion post 20 cannot continue to move forward in the mating cylinder 15. At this time, the rubber head 19 is located in the countersunk structure of the second mounting hole 5. After this, the mounting component 6 rotates, causing the plug block 23 to rotate along the fixing groove 17 so that its projection does not overlap with the plug groove 16 and it abuts against the limiting block 18. At this time, the plug block 23, whose projection does not overlap with the plug groove 16, cannot move backward through the plug groove 16 and can only be restricted to continue rotating within the fixing groove 17. At the same time, the limiting block 18 restricts the rotation range of the plug block 23 within the fixing groove 17 by abutting against it. After this, rotating the clamping screw block 22 allows for the creation of a suitable connecting groove structure on the clamping screw block 22, enabling the operator to use external tools, such as a screwdriver, to rotate the clamping screw block 22. By rotating the clamping screw 22, it rotates relative to the rubber head 19. Due to the restriction of the limiting block 18, the plug block 23 cannot rotate after rotating to abut against it. After the plug block 23 cannot rotate, the plug post 20 and the rubber head 19 cannot rotate either. At this time, by rotating the clamping screw 22, the clamping screw 22 and the rubber head 19 can rotate in a corresponding manner. After the clamping screw 22 rotates, it moves closer to the plug post 20, so that the clamping screw 22 can squeeze the rubber head 19 to increase the friction between the rubber head 19 and the countersunk structure of the second mounting hole 5. After the friction between the rubber head 19 and the countersunk structure of the second mounting hole 5 increases, it is difficult for the entire mounting part 6 to rotate in the second mounting hole 5 and the first mounting hole 3. With the plug block 23 being restricted by the fixing groove 17, the mounting part 6 cannot be dislodged from the first mounting hole 3 and the second mounting hole 5, so that the mounting part 6 can fix the maintenance cover plate 4 on the inspection window 2.

[0037] With the installation of the mounting piece 6 and the fitting cylinder 15, the operator only needs to rotate the mounting piece 6 about half a turn and then rotate the clamping screw block 22 about two turns to fix the maintenance sealing plate 4 to the wind turbine cabinet 1. The overall operation time is short and the labor intensity of the operator can be greatly reduced.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, characterized in that: Includes the following steps: Step S1: Safety isolation; Stop the wind turbine and lock the rotating part on the back of the wind turbine cabinet (1), cut off the high voltage power supply inside the cabinet, and disconnect the control line of the cooling fan inside the cabinet; Step S2: Hole making; Locate the projection area of ​​the cooling fan on the wind turbine cabinet (1) and cut out the maintenance window (2) that matches the projection area. Then, make the first mounting hole (3) around the maintenance window (2). Step S3: Cover plate processing; A maintenance cover plate (4) that can cover the inspection window (2) is processed in the factory, a cooling fan is pre-installed on the maintenance cover plate (4), and a second mounting hole (5) matching the first mounting hole (3) is opened on the maintenance cover plate (4). Step S4: Install the cover plate; connect the internal components of the wind turbine to the cooling fan pre-installed on the maintenance cover plate (4) through the inspection window (2), then cover the inspection window (2) with the maintenance cover plate (4), and fix the maintenance cover plate (4) on the inspection window (2) by inserting the mounting piece (6) into the first mounting hole (3) and the second mounting hole (5).

2. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 1, is characterized in that: The maintenance window (2) is located on the cabinet (1) of the wind turbine unit, at the cabinet position on the back of the cooling fan.

3. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 1, is characterized in that: The solution also includes the following steps: Step S5: Debug the whole machine; test the operation of the cooling fan and the heat dissipation temperature inside the fan turbine cabinet (1) to verify that the heat dissipation function is normal.

4. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 1, is characterized in that: The first mounting hole (3) is a threaded hole structure, the second mounting hole (5) is a countersunk hole structure, and the mounting part (6) is a screw part. After the maintenance cover plate (4) covers the inspection window (2), the mounting part (6) first passes through the second mounting hole (5) and then locks into the first mounting hole (3) to fix the maintenance cover plate (4) on the inspection window (2).

5. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 1, is characterized in that: Step S2 also includes the following structure: After cutting out the maintenance window (2), the edge of the maintenance window (2) is bent so that it is recessed relative to the surface of the wind turbine cabinet (1), thereby forming a recessed placement structure (7) on the wind turbine cabinet.

6. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 5, is characterized in that: Step S3 also includes the following steps: When processing the maintenance sealing plate (4), the size of the maintenance sealing plate (4) is such that it can be placed into the placement structure (7), and there is an installation space (8) between it and the peripheral side wall of the placement structure (7). The thickness of the maintenance sealing plate (4) is such that it does not exceed the placement structure (7) after being placed into the placement structure (7).

7. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 6, is characterized in that: A sealing frame (9) is placed in the installation space (8). After the maintenance sealing plate (4) is placed in the placement structure (7), it is inside the sealing frame (9) and is tightly attached to the sealing frame (9). The sealing frame (9) is bonded to the side wall of the placement structure (7) by sealant (10). A first sealing block (11) is provided on the side wall of the sealing frame (9) close to the fan unit cabinet. A first sealing groove (12) matching the first sealing block (11) is opened on the fan unit cabinet. When the sealing frame (9) is placed in the installation space (8), the first sealing block (11) is inserted into the first sealing groove (12).

8. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 7, is characterized in that: A second sealing block (13) is provided on the side wall of the sealing frame (9) close to the maintenance sealing plate (4). A second sealing groove (14) matching the second sealing block (13) is provided on the maintenance sealing plate (4). When the maintenance sealing plate (4) is inside the sealing frame (9) and is tightly attached to the sealing frame (9), the second sealing block (13) is inserted into the second sealing groove (14).

9. The solution for a heat dissipation structure of a wind turbine cabinet (1) that does not require overall disassembly, as described in claim 1, is characterized in that: The first mounting hole (3) is a straight hole structure, and the second mounting hole (5) is a countersunk hole structure. A fitting part is also fixedly installed in the first mounting hole (3). The mounting part (6) first passes through the second mounting hole (5) and then passes through the first mounting hole (3) to fix the maintenance sealing plate (4) on the inspection window (2).

10. The solution for a heat dissipation structure of a wind turbine cabinet (1) without overall disassembly as described in claim 9, characterized in that: The fitting component includes a fitting cylinder (15), which is fixed in the first mounting hole (3). A insertion groove (16) extending along the length of the fitting cylinder (15) is provided at the end of the fitting cylinder (15) close to the second mounting hole (5). The insertion groove (16) is provided on the inner wall of the fitting cylinder (15). A fixing groove (17) with an annular structure is also provided on the inner wall of the fitting cylinder (15). The insertion groove (16) and the fixing groove (17) are connected. A limiting block (18) blocking the fixing groove (17) is also provided in the fixing groove (17). The mounting component (6) includes a rubber head (19) and a plug (20). The rubber head (19) and the plug (20) are bonded together. A clamping screw block (22) is threadedly connected to the rubber head (19) through a threaded groove (21). A plug block (23) is provided on the side wall of the plug (20). The size of the plug block (23) is set to allow it to move in the plug groove (16) and the fixing groove (17). The method for fixing the mounting part (6) and the mating part includes the following steps: the mounting part (6) is first passed through the second mounting hole (5) and then inserted into the first mounting hole (3). During this process, the plug pin (20) is inserted into the mating sleeve (15) located in the first mounting hole (3) after passing through the second mounting hole (5). During the process of the plug pin (20) being inserted into the mating sleeve (15), the plug block (23) slides along the plug groove (16). After the plug block (23) slides to the position of the fixing groove (17), the plug block (23) cannot be fixed. Continue moving along the insertion groove (16). At this time, the rubber head (19) is located in the countersunk structure of the second mounting hole (5). After that, the mounting part (6) rotates and drives the insertion block (23) to rotate along the fixing groove (17) so that its projection does not overlap with the insertion groove (16) and it abuts against the limiting block (18). Then, rotate the clamping screw (22) so that it rotates relative to the rubber head (19) and the clamping screw (22) squeezes the rubber head (19) to increase the friction between the rubber head (19) and the countersunk structure of the second mounting hole (5).

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