Liquid-immersed transformer for wind power cabin

Abstract

The invention relates to the technical field of transformers, in particular to a liquid-immersed transformer for a wind power cabin. The invention can solve the following problems in the actual use process of the existing transformer: as a wind power cabin is in a dynamic operation environment, the transformer needs to continuously bear complex vibration and impact, while the vibration effect suffered by the transformer cannot be relieved in the prior art, and the safe operation is threatened; air between the corrugated pipe and the piston plate is converted from conveying to compression, so that longitudinal vibration and impact of the transformer body can be relieved and counteracted, and horizontal vibration and impact in the left-right direction and the front-back direction of the transformer body can be relieved and counteracted; therefore, the amplitude and impact of the transformer body in the horizontal direction are all-directionally relieved, the stability of the transformer body is improved, and the use effect and the service life of the transformer body are prevented from being affected by long-term vibration and impact.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a liquid-immersed transformer for wind turbine nacelles. Background Technology

[0002] Transformers are the core equipment in power systems that realize the transformation of electrical energy voltage and achieve efficient power transmission and distribution. Based on the different insulation and cooling media, transformers can be mainly divided into two categories: dry-type transformers and liquid-immersed transformers. Among them, liquid-immersed transformers refer to transformers in which the iron core and windings are completely immersed in insulating liquid (such as mineral oil). The insulating liquid plays a dual role of insulation and heat dissipation.

[0003] Because liquid-immersed transformers are relatively compact and have stable performance, they are often used in some wind turbine nacelle environments. However, the internal space of a wind turbine nacelle is small, making it difficult to efficiently dissipate the heat generated during transformer operation. Therefore, existing technologies provide solutions for heat dissipation in liquid-immersed transformers. For example, Chinese Patent CN217361322U discloses a liquid-immersed transformer, including a tank and a cover. Heat dissipation devices are provided on the front and rear sides of the tank. Each heat dissipation device includes a radiator and a connecting pipe. The radiator consists of multiple heat sinks, and the connecting pipe is connected to the side wall of the tank. An oil supply device is provided inside the connecting pipe. This prior art dissipates heat from the insulating liquid in the liquid-immersed transformer through the heat dissipation device. The connecting pipe is used to deliver the insulating liquid from the tank into the connecting pipe, promoting the flow of the insulating liquid and further improving the heat dissipation effect. In addition, the multiple heat sinks provide a larger effective contact area, thereby improving the heat dissipation effect of the radiator.

[0004] However, the aforementioned existing technologies have some shortcomings in the actual use of liquid-immersed transformers: due to the wide range of applications of liquid-immersed transformers, when they are installed in wind turbine nacelles, they are usually fixed installations. However, wind turbine nacelles are dynamic operating environments. During operation, the transformer needs to continuously withstand complex vibrations and impacts from wind turbine operation and external wind loads, such as longitudinal vibration and multi-directional horizontal vibration. The aforementioned existing technologies cannot alleviate the vibration effects on the transformer. Therefore, long-term vibration may cause internal connecting parts to loosen, resulting in abnormal noise, or even cause faults such as insulation wear or oil leakage, threatening safe operation.

[0005] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing liquid-immersed transformers. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides a liquid-immersed transformer for a wind turbine nacelle, comprising a transformer body, a support frame at the lower end of the transformer body, and a longitudinal vibration buffer device at the lower end of the support frame to counteract the vertical vibration of the transformer body. The longitudinal vibration buffer device includes a support frame installed at the lower end of the support frame, and a transverse vibration buffer device at the lower end of the support frame to counteract the horizontal vibration of the transformer body. The transverse vibration buffer device includes a bearing plate installed at the lower end of the support frame.

[0007] Preferably, the support frame includes two top support frames symmetrically installed at the bottom of the transformer body. The two top support frames are symmetrically arranged along the transformer body, and the top support frames are U-shaped structures placed horizontally. A reinforcing cross plate is provided between the two top support frames.

[0008] Preferably, the support frame consists of multiple horizontal and vertical sections, wherein the multiple horizontal sections are located at the lower ends of the top support frame and the reinforcing horizontal plate, and the longitudinal vibration buffer device further includes an elastic rubber pad installed between the support frame, the top support frame, and the reinforcing horizontal plate.

[0009] Preferably, the longitudinal vibration buffer device further includes multiple linkage mechanisms installed at equal intervals on the support frame. Multiple bolts are threaded through the vertical section of the top support frame. After passing through the top support frame, the bolts are threaded to the linkage mechanisms to connect and fix the top support frame and the support frame.

[0010] Preferably, the linkage mechanism includes a sliding groove formed in the vertical section of the support frame, a connecting block is vertically slidably arranged in the sliding groove, a threaded cylinder is installed on the side of the connecting block away from the bolt, the bolt passes through the connecting block and connects with the threaded cylinder, an annular plate is movably sleeved on the outer wall of the side of the bolt away from the threaded cylinder, and a tension spring is sleeved between the annular plate and the end of the bolt away from the threaded cylinder.

[0011] Preferably, an installation cover is provided between the vertical section of the support frame with the connecting block and the horizontal section located below the reinforcing horizontal plate. The inner wall of the installation cover is provided with multiple air storage chambers distributed at intervals with the bolts. A piston plate is slidably provided on the inner wall of the air storage chamber. Return springs are installed at both ends of the piston plate and between the air storage chambers. The air storage chamber is divided into an upper air storage area and a lower air storage area by the piston plate. Corrugated pipes are installed at both the top and bottom of the connecting block. Two air pipes connected to the corrugated pipes are opened on the support frame. The two air pipes at the top and bottom of the connecting block are connected to the upper air storage area and the lower air storage area, respectively.

[0012] Preferably, the transverse vibration buffer device further includes a support plate slidably installed at the lower end of the support plate, and a limiting frame that is slidably covered outside the support plate is provided at the upper end of the support plate, so that the support plate can slide along the length direction of the limiting frame, and a plurality of first damping rods are installed at equal intervals on both inner walls of the limiting frame in the width direction.

[0013] Preferably, the outer walls on both sides of the bearing plate along its length are provided with slots, and the inner wall of the limiting frame is provided with a limiting strip that slides into the slots.

[0014] Preferably, the transverse vibration buffer device further includes multiple T-shaped plates installed at equal intervals at the lower end of the support frame, with the horizontal section of the T-shaped plate located at the bottom. The upper end of the support plate is provided with multiple positioning blocks corresponding to the positions of the T-shaped plates. The upper end of the positioning blocks is provided with a limiting groove for slidingly accommodating the T-shaped plates. Both ends of the horizontal section of the T-shaped plate are equipped with a return spring and two second damping rods symmetrically distributed along the return spring between them and the limiting groove.

[0015] In summary, this application includes the following beneficial technical effects: I. This invention can reduce and offset the vertical and horizontal vibrations and impacts of the transformer body, thereby preventing the transformer body from being subjected to long-term vibrations and impacts that affect its performance and service life.

[0016] Second, the present invention can connect and fix the top support frame and the support frame through the threaded connection between the bolt and the threaded cylinder. When the bolt is subjected to vibration of the transformer body, it can drive the threaded cylinder and the connecting block to slide adaptively in the sliding groove. At the same time, the bellows on the upper and lower sides of the connecting block, together with the piston plate, can buffer the air entering the upper and lower air storage areas, so that the air between the bellows and the piston plate is changed from conveying to compression. This can reduce the amplitude and impact of the longitudinal vibration of the connecting block. In addition, the bolt and the top support frame can reduce and offset the vibration and impact of the transformer body, ensuring the working stability of the transformer body in a specific environment.

[0017] Third, the present invention can reduce and offset the horizontal vibration of the transformer body in the left and right directions by the cooperation of the support plate, the limiting frame and the first damping rod, and can reduce and offset the horizontal vibration and impact of the transformer body in the front and rear directions by the T-shaped plate and the second damping rod, thereby ensuring that the amplitude and impact of the transformer body in the horizontal direction are reduced in all directions and improving the stability of the transformer body. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure between the support frame, the bracket, and the elastic pad of the present invention.

[0021] Figure 3 This is the present invention. Figure 2 A magnified view of part A.

[0022] Figure 4 This is a schematic diagram of the linkage mechanism of the present invention.

[0023] Figure 5 This is the present invention. Figure 4 A magnified view of section B.

[0024] Figure 6 This is a schematic diagram of the transverse vibration buffer device of the present invention.

[0025] Figure 7 This is the present invention. Figure 6 A magnified view of a portion of point C.

[0026] Figure 8 This is the present invention. Figure 6 A magnified view of a portion of point D.

[0027] In the diagram, 1. Transformer body; 2. Support frame; 21. Top support frame; 22. Reinforcing horizontal plate; 3. Longitudinal vibration buffer device; 31. Support frame; 32. Elastic rubber pad; 33. Linkage mechanism; 331. Sliding groove; 332. Connecting block; 333. Threaded cylinder; 334. Annular plate; 335. Tension spring; 336. Mounting cover; 337. Air chamber; 338. Piston plate; 339. Return spring; 340. Bellows; 341. Air pipe; 35. Bolt; 4. Lateral vibration buffer device; 41. Bearing plate; 42. Support plate; 43. Limiting frame; 44. First damping rod; 45. Slot; 46. Limiting strip; 47. T-shaped plate; 48. Positioning block; 481. Limiting groove; 482. Return spring; 483. Second damping rod. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-8 The embodiments of the present invention will be described in detail below.

[0029] This application discloses a liquid-immersed transformer for wind turbine nacelles. It should be noted that this liquid-immersed transformer for wind turbine nacelles is mainly used for vibration and shock protection. Technically, it can reduce and offset the vertical and horizontal vibrations and impacts of the transformer body 1, thereby preventing the transformer body 1 from being subjected to long-term vibration and impacts that could affect its performance and service life. Specifically, in reducing and offsetting the vertical vibrations and impacts of the transformer body 1, a pneumatic method is used to convert the air generated during the vertical vibration of the transformer body 1 from conveying to compression, thereby reducing the amplitude and impact of the longitudinal vibration of the transformer body 1. Furthermore, this liquid-immersed transformer for wind turbine nacelles can also reduce and offset the horizontal vibrations of the transformer body 1 in the left-right and front-back directions, thereby ensuring that the amplitude and impact of the horizontal vibration of the transformer body 1 are reduced in all directions, improving the stability of the transformer body 1.

[0030] Reference Figure 1 and Figure 2 As shown, a liquid-immersed transformer for a wind turbine nacelle includes a transformer body 1, a support frame 2 at the lower end of the transformer body 1, and a longitudinal vibration buffer device 3 at the lower end of the support frame 2 to counteract the vertical vibration of the transformer body 1. The longitudinal vibration buffer device 3 includes a support frame 31 installed at the lower end of the support frame 2, and a transverse vibration buffer device 4 at the lower end of the support frame 31 to counteract the horizontal vibration of the transformer body 1. The transverse vibration buffer device 4 includes a bearing plate 41 installed at the lower end of the support frame 31.

[0031] In the specific implementation process, since the transformer body 1 is installed inside the wind turbine nacelle in a dynamic operating environment, it will be subjected to vibration and impact. The longitudinal vibration buffer device 3 can reduce and offset the vertical vibration and impact of the transformer body 1, while the transverse vibration buffer device 4 can reduce and offset the horizontal vibration and impact of the transformer body 1, thereby avoiding the transformer body 1 from being subjected to vibration and impact for a long time, which would affect its performance and service life.

[0032] Furthermore, to ensure the stability of the transformer body 1 after installation, in this embodiment, the support frame 2 includes two top support frames 21 symmetrically installed at the bottom of the transformer body 1. The two top support frames 21 are symmetrically arranged along the transformer body 1, and the top support frames 21 are U-shaped structures placed horizontally. The openings of the two top support frames 21 are arranged opposite to each other, that is, the opposite sides of the two top support frames 21 are vertical sections. A reinforcing horizontal plate 22 is provided between the two top support frames 21. The top support frames 21 and the reinforcing horizontal plate 22 can provide sufficient support and fixation for the transformer body 1, ensuring its stability after installation. It should be noted that an upward indentation is formed between the vertical sections of the two top support frames 21 and the reinforcing horizontal plate 22.

[0033] Reference Figure 2 and Figure 3 As shown, in order to prevent the transformer body 1 from being easily damaged by vibration and impact, a corresponding longitudinal vibration buffer device 3 is provided in this embodiment. Specifically, the support frame 31 is composed of multiple horizontal and vertical sections, wherein the multiple horizontal sections are located at the lower ends of the top support frame 21 and the reinforcing horizontal plate 22, respectively. The longitudinal vibration buffer device 3 also includes an elastic rubber pad 32 installed between the support frame 31, the top support frame 21, and the reinforcing horizontal plate 22. The elastic rubber pad 32 can reduce vibration between the top support frame 21 and the support frame 31, and prevent the top support frame 21 and the support frame 31 from impacting when the transformer body 1 drives the top support frame 21 to vibrate in the vertical direction, thereby extending the service life.

[0034] Furthermore, in this embodiment, the longitudinal vibration buffer device 3 also includes multiple linkage mechanisms 33 that are equally spaced and installed on the support frame 31. Multiple bolts 35 are threaded through the vertical section of the top support frame 21. After passing through the top support frame 21, the bolts 35 are threaded to the linkage mechanism 33 to connect and fix the top support frame 21 and the support frame 31.

[0035] Reference Figure 3 , Figure 4 and Figure 5 As shown, to avoid vertical vibration between the top support frame 21 and the support frame 31 when connected by bolts 35, a linkage mechanism 33 is used in this embodiment to avoid this problem. Specifically, the linkage mechanism 33 includes a sliding groove 331 opened in the vertical section of the support frame 31. A connecting block 332 is vertically slidably arranged in the sliding groove 331. A threaded cylinder 333 is installed on the side of the connecting block 332 away from the bolt 35. After the bolt 35 passes through the connecting block 332, it connects with the threaded cylinder 333. An annular plate 334 is movably sleeved on the outer wall of the side of the bolt 35 away from the threaded cylinder 333. A tension spring 335 is sleeved between the annular plate 334 and the end of the bolt 35 away from the threaded cylinder 333. The tension spring 335 always applies a thrust to the annular frame. After the bolt 35 is installed, the annular plate 334 abuts against the side wall of the top support frame 21 under the action of the tension spring 335 to increase the friction between the bolt 35 and the threaded cylinder 333, thereby achieving the purpose of self-locking of the bolt 35.

[0036] Furthermore, in this embodiment, a mounting cover 336 is provided between the vertical section of the support frame 31 where the connecting block 332 is installed and the horizontal section located below the reinforcing horizontal plate 22. The inner wall of the mounting cover 336 is provided with a plurality of air storage chambers 337 spaced apart from the bolts 35. A piston plate 338 is slidably provided on the inner wall of the air storage chamber 337. A return spring 339 is installed at both the upper and lower ends of the piston plate 338 and between the air storage chamber 337. The piston plate 338 divides the air storage chamber 337 into an upper air storage area and a lower air storage area. The upper and lower gas storage areas are equal in volume. The upper and lower gas storage areas are connected by a bellows 340 installed at both ends of the connecting block 332. The support frame 31 has two air pipes 341 connected to the bellows 340. The upper and lower air pipes 341 of the connecting block 332 are connected to the upper and lower gas storage areas respectively.

[0037] In the specific implementation process, the threaded connection between the bolt 35 and the threaded cylinder 333 can connect and fix the top support frame 21 and the support frame 31. When the transformer body 1 is subjected to vibration and impact and longitudinal vibration occurs, it drives the top support frame 21 and the bolt 35 to vibrate longitudinally as a whole. At the same time, the bolt 35 drives the threaded cylinder 333 and the connecting block 332 to slide longitudinally adaptively in the sliding groove 331. This not only ensures that the top support frame 21 and the support frame 31 remain connected when vibration occurs, but also prevents the rigid connection between the bolt 35 and the support frame 31 from bending and deforming under the vibration effect, thus affecting the connection effect.

[0038] As the connecting block 332 slides longitudinally, it compresses the bellows 340 on its upper and lower sides, causing the air in the bellows 340 to be sent into the air storage chamber 337 through the air pipe 341. The air in the upper and lower bellows 340 is sent into the upper air storage area and the lower air storage area, respectively. Since the piston plate 338 is located in the middle of the air storage chamber 337 under the action of the return spring 339, the piston plate 338 can buffer the air entering the upper and lower air storage areas. During the buffering stage, the air between the bellows 340 and the piston plate 338 is changed from conveying to compression, which can reduce the amplitude and impact of the longitudinal vibration of the connecting block 332. In turn, the vibration and impact of the transformer body 1 are reduced and offset by the bolt 35 and the top support 21, ensuring the working stability of the transformer body 1 under specific conditions.

[0039] Reference Figure 6 and Figure 7 As shown, since the dynamic operating environment generated by the wind turbine nacelle includes not only vertical vibration but also horizontal vibration, in order to reduce the horizontal vibration and impact on the transformer body 1, a corresponding lateral vibration buffer device 4 is also provided in this embodiment. The lateral vibration buffer device 4 also includes a support plate 42 slidably installed on the lower end of the support plate 41. A limiting frame 43 is provided on the upper end of the support plate 42 and is slidably covered outside the support plate 41, so that the support plate 41 can slide along the length direction of the limiting frame 43. Multiple first damping rods 44 are installed at equal intervals on both inner walls of the limiting frame 43 in the width direction.

[0040] Furthermore, in this embodiment, slots 45 are provided on both outer walls of the bearing plate 41 along its length, and a limiting strip 46 is provided on the inner wall of the limiting frame 43, which slides into the slots 45. Through the cooperation between the limiting strip 46 and the slots 45, the movement range of the bearing plate 41 can be limited to the horizontal direction, and the bearing plate 41 can only move along the slots 45, that is, along the length of the limiting frame 43.

[0041] In the specific implementation process, when the transformer body 1 is subjected to horizontal vibration and impact, it can drive the support plate 42 to move along the length direction of the limiting frame 43. At the same time, the first damping rod 44 can reduce and offset the horizontal impact of the support plate 42, further ensuring the stability of the transformer body 1 during operation. Thus, the cooperation of the support plate 42, the limiting frame 43 and the first damping rod 44 can reduce and offset the horizontal vibration of the transformer body 1 in the left and right directions.

[0042] Reference Figure 6 and Figure 8 As shown, since the transformer body 1 is subjected to horizontal vibrations not only in the left and right directions, but also in the front and back directions, although the cooperation of the support plate 42, the limiting frame 43 and the first damping rod 44 can reduce and offset the horizontal vibrations in the left and right directions, it is also necessary to ensure that the transformer body 1 is not subjected to horizontal vibrations in the front and back directions. Based on this, in this embodiment, the lateral vibration buffer device 4 also includes a plurality of T-shaped plates 47 equally spaced and installed at the lower end of the support frame 31, and the horizontal section of the T-shaped plate 47 is located at the bottom, and the upper end of the support plate 41 is provided with Multiple positioning blocks 48 are provided, corresponding to the positions of the T-shaped plate 47. The upper end of the positioning block 48 is provided with a limiting groove 481 for slidingly accommodating the T-shaped plate 47. Both ends of the horizontal section of the T-shaped plate 47 are equipped with a return spring 482 and two second damping rods 483 symmetrically distributed along the return spring 482 between them and the limiting groove 481. The return spring 482 always applies a driving force to the T-shaped plate 47. Through the return springs 482 at both ends of the T-shaped plate 47, the T-shaped plate 47 can be positioned in the middle of the limiting groove 481 when no other external force is applied.

[0043] In the specific implementation process, when the transformer body 1 is subjected to horizontal vibration and impact in the front-to-back direction, it can drive the support frame 31 and the T-shaped plate 47 to move along the limiting slide groove 481 as a whole. The second damping rod 483 can reduce and offset the horizontal amplitude and impact of the T-shaped plate 47, thereby reducing and offsetting the horizontal vibration and impact of the transformer body 1 in the front-to-back direction. In addition, with the support plate 42, the limiting frame 43 and the first damping rod 44, it can ensure that the horizontal amplitude and impact of the transformer body 1 are reduced in all directions, thereby improving the stability of the transformer body 1.

[0044] During operation: First step: The top support frame 21 and the support frame 31 can be connected and fixed by the threaded connection between the bolt 35 and the threaded cylinder 333. Then, the transformer body 1 is installed in the designated position in the wind turbine nacelle by the support frame 31, the bearing plate 41 and the support plate 42.

[0045] Step 2: When the transformer body 1 is subjected to vibration and impact and longitudinal vibration occurs, it drives the top support frame 21 and bolt 35 to vibrate longitudinally as a whole. At the same time, the bolt 35 drives the threaded cylinder 333 and the connecting block 332 to slide longitudinally adaptively in the sliding groove 331, ensuring that the top support frame 21 and the support frame 31 remain connected when vibration occurs.

[0046] As the connecting block 332 slides longitudinally, it compresses the bellows 340 on its upper and lower sides, causing the air in the upper and lower bellows 340 to be sent into the upper and lower air storage areas respectively. At this time, the piston plate 338 can buffer the air entering the upper and lower air storage areas, so that the air between the bellows 340 and the piston plate 338 is changed from conveying to compression. This can reduce the amplitude and impact of the longitudinal vibration of the connecting block 332, and then reduce and offset the vibration and impact of the transformer body 1 through the bolt 35 and the top support 21, ensuring the working stability of the transformer body 1 under specific environment.

[0047] Step 3: When the transformer body 1 is subjected to horizontal vibration and impact, it can drive the support plate 42 to move along the length of the limiting frame 43. At the same time, the first damping rod 44 can reduce and offset the horizontal impact of the support plate 42. Thus, through the cooperation of the support plate 42, the limiting frame 43 and the first damping rod 44, the horizontal vibration of the transformer body 1 in the left and right directions can be reduced and offset.

[0048] When the transformer body 1 is subjected to horizontal vibration and impact in the front-to-back direction, it can drive the support frame 31 and the T-shaped plate 47 to move along the limiting slide groove 481. The second damping rod 483 can reduce and offset the horizontal amplitude and impact of the T-shaped plate 47, thereby reducing and offsetting the horizontal vibration and impact of the transformer body 1 in the front-to-back direction. In addition, with the support plate 42, the limiting frame 43 and the first damping rod 44, it can ensure that the horizontal amplitude and impact of the transformer body 1 are reduced in all directions, thereby improving the stability of the transformer body 1.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid-immersed transformer for wind turbine nacelles, comprising a transformer body (1), characterized in that: The transformer body (1) is provided with a support frame (2) at the lower end. The support frame (2) is provided with a longitudinal vibration buffer device (3) at the lower end to counteract the vertical vibration effect of the transformer body (1). The longitudinal vibration buffer device (3) includes a support frame (31) installed at the lower end of the support frame (2). The support frame (31) is provided with a transverse vibration buffer device (4) at the lower end to counteract the horizontal vibration effect of the transformer body (1). The transverse vibration buffer device (4) includes a bearing plate (41) installed at the lower end of the support frame (31).

2. A liquid-immersed transformer for a wind turbine nacelle according to claim 1, characterized in that: The support frame (2) includes two top support frames (21) symmetrically installed at the bottom of the transformer body (1). The two top support frames (21) are symmetrically arranged along the transformer body (1), and the top support frame (21) is a U-shaped structure placed horizontally. A reinforcing horizontal plate (22) is provided between the two top support frames (21).

3. A liquid-immersed transformer for a wind turbine nacelle according to claim 2, characterized in that: The support frame (31) consists of multiple horizontal and vertical sections, with the multiple horizontal sections located at the lower ends of the top support frame (21) and the reinforcing horizontal plate (22). The longitudinal vibration buffer device (3) also includes an elastic rubber pad (32) installed between the support frame (31), the top support frame (21), and the reinforcing horizontal plate (22).

4. A liquid-immersed transformer for a wind turbine nacelle according to claim 2, characterized in that: The longitudinal vibration buffer device (3) also includes multiple linkage mechanisms (33) installed at equal intervals on the support frame (31). Multiple bolts (35) are threaded through the vertical section of the top support frame (21). After passing through the top support frame (21), the bolts (35) are threaded to the linkage mechanism (33) to connect and fix the top support frame (21) and the support frame (31).

5. A liquid-immersed transformer for a wind turbine nacelle according to claim 4, characterized in that: The linkage mechanism (33) includes a sliding groove (331) opened in the vertical section of the support frame (31). A connecting block (332) is vertically slidably arranged in the sliding groove (331). A threaded cylinder (333) is installed on the side of the connecting block (332) away from the bolt (35). After the bolt (35) passes through the connecting block (332), it is connected to the threaded cylinder (333). An annular plate (334) is movably sleeved on the outer wall of the side of the bolt (35) away from the threaded cylinder (333). A tension spring (335) is sleeved between the annular plate (334) and the end of the bolt (35) away from the threaded cylinder (333).

6. A liquid-immersed transformer for a wind turbine nacelle according to claim 5, characterized in that: An installation cover (336) is provided between the vertical section of the support frame (31) on which the connecting block (332) is installed and the horizontal section located below the reinforcing horizontal plate (22). The inner wall of the installation cover (336) is provided with multiple air storage chambers (337) spaced apart from the bolts (35). A piston plate (338) is slidably provided on the inner wall of the air storage chamber (337). A return spring (339) is installed between the upper and lower ends of the piston plate (338) and the air storage chamber (337). The air storage chamber (337) is divided into an upper air storage area and a lower air storage area by the piston plate (338). Corrugated pipes (340) are installed at both the upper and lower ends of the connecting block (332). Two air pipes (341) connected to the corrugated pipes (340) are opened on the support frame (31). The two air pipes (341) of the connecting block (332) are connected to the upper air storage area and the lower air storage area respectively.

7. A liquid-immersed transformer for a wind turbine nacelle according to claim 1, characterized in that: The transverse vibration buffer device (4) further includes a support plate (42) slidably installed on the lower end of the bearing plate (41). The upper end of the support plate (42) is provided with a limiting frame (43) that is slidably covered outside the bearing plate (41), so that the bearing plate (41) can slide along the length direction of the limiting frame (43). Multiple first damping rods (44) are installed at equal intervals on both sides of the inner wall of the limiting frame (43) in the width direction.

8. A liquid-immersed transformer for a wind turbine nacelle according to claim 7, characterized in that: The bearing plate (41) has slots (45) on both outer walls along its length, and the inner wall of the limiting frame (43) has a limiting strip (46) that slides into the slots (45).

9. A liquid-immersed transformer for a wind turbine nacelle according to claim 1, characterized in that: The transverse vibration buffer device (4) also includes multiple T-shaped plates (47) installed at equal intervals at the lower end of the support frame (31), and the horizontal section of the T-shaped plate (47) is located at the bottom. Multiple positioning blocks (48) corresponding to the position of the T-shaped plate (47) are provided at the upper end of the bearing plate (41). The upper end of the positioning block (48) is provided with a limiting groove (481) for sliding to accommodate the T-shaped plate (47). Both ends of the horizontal section of the T-shaped plate (47) are equipped with a return spring (482) and two second damping rods (483) symmetrically distributed along the return spring (482) between them and the limiting groove (481).

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