Transformer body structure and transformer

Abstract

This utility model discloses a transformer core structure and a transformer, which can effectively reduce eddy current losses, stray losses, and circulating current losses generated in the iron clamps while ensuring the structural strength of the transformer core. The transformer core structure includes clamps, specifically two upper clamps arranged side-by-side, respectively positioned on both sides of the yoke on the iron core; the upper clamps are made of insulating material. The transformer core structure also includes a fixing frame assembly, comprising an upper fixing frame located between the two upper clamps. Both ends of the two upper clamps are fixed to the upper fixing frame, which provides lateral support to both ends of the two upper clamps.

Description

Technical Field

[0001] This utility model belongs to the field of transformer manufacturing technology, specifically relating to a transformer body structure and a transformer. Background Technology

[0002] Transformers used in new energy applications, especially wind farm nacelle transformers used in wind turbines, are subject to long-term vibration due to the operating characteristics of wind turbine blades. The transformers installed in the nacelle are in a state of long-term vibration throughout their entire life cycle, which places higher demands on the vibration resistance of the transformer body.

[0003] In existing technologies, transformer bodies typically use iron clamps to improve structural strength and vibration resistance. However, due to the relatively low generator-side voltage (around 1kV) of wind turbines, the low-voltage input current to the transformer is large (above 3000A). This high-current leads easily induce significant eddy current losses, stray losses, and circulating current losses in traditional iron clamps, thereby reducing transformer efficiency, increasing temperature rise, and shortening transformer lifespan.

[0004] Therefore, how to reduce eddy current losses, stray losses, and circulating losses generated in the iron clamps while ensuring the structural strength of the transformer body is a problem that needs to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the above-mentioned deficiencies in the existing technology by providing a transformer body structure and a transformer that can effectively reduce eddy current losses, stray losses and circulating losses generated in the iron clamps while ensuring the structural strength of the transformer body.

[0006] In a first aspect, this utility model provides a transformer core structure, which includes clamping members. The clamping members include two upper clamping members arranged side-by-side, each positioned on one side of the yoke on the iron core. The upper clamping members are made of insulating material. The transformer core structure also includes a fixing frame assembly, which includes an upper fixing frame located between the two upper clamping members. Both ends of the two upper clamping members are fixed to the upper fixing frame, which provides lateral support to both ends of the two upper clamping members.

[0007] In some embodiments, the upper fixing frame is fixed to the tank cover of the transformer tank. The low-voltage leads of the windings of the transformer body structure are led out between the two upper clamps.

[0008] In some embodiments, the clamping member further includes two lower clamping members arranged side by side, the two lower clamping members being disposed on both sides of the lower yoke of the iron core. The fixing frame assembly further includes a lower fixing frame and lower pads, the lower fixing frame being disposed between the two lower clamping members, and the lower pads being disposed below the two lower clamping members. Both ends of the two lower clamping members are fixed to the lower fixing frame and the lower pads, so that the lower fixing frame and the lower pads jointly support the two ends of the two lower clamping members in the lateral direction.

[0009] In some embodiments, a tie rod fixing support plate is provided on the upper fixing frame at the position corresponding to the end of the upper clamping member. The transformer body structure further includes a longitudinal screw assembly, which includes a first longitudinal screw, disposed near the end of the upper clamping member. The first longitudinal screw passes through the tie rod fixing support plate, the upper clamping member, and the lower clamping member sequentially from top to bottom. A first clamping member is provided at both ends of the first longitudinal screw, and a second clamping member is provided on the upper side of the upper clamping member, so as to clamp the tie rod fixing support plate and the lower clamping member through the first clamping member, and simultaneously clamp the upper surface of the upper clamping member through the second clamping member.

[0010] In some embodiments, the longitudinal screw assembly further includes a second longitudinal screw, which is vertically disposed between two adjacent windings. A U-shaped pull plate is provided on the upper fixing frame corresponding to the position of the second longitudinal screw. The second longitudinal screw passes through the U-shaped pull plate, the upper clamp, and the lower clamp sequentially from top to bottom. A third clamping member is provided at both ends of the second longitudinal screw, and a fourth clamping member is provided on the upper side of the upper clamp, so as to clamp the U-shaped pull plate and the lower clamp through the third clamping member, and simultaneously clamp the upper surface of the upper clamp through the fourth clamping member.

[0011] In some embodiments, both the second clamping member and the fourth clamping member include a first flat washer, a first anti-loosening disc spring washer, a first nut, and an anti-loosening fastening nut arranged sequentially from bottom to top.

[0012] In some embodiments, a first clamping member is provided on the lower side of the tie rod fixing support plate on the first longitudinal screw, so as to jointly clamp the tie rod fixing support plate with the first clamping member at the upper end of the first longitudinal screw; and / or, a first clamping member is provided on the upper side of the lower clamping member on the first longitudinal screw, so as to jointly clamp the lower clamping member with the first clamping member at the lower end of the first longitudinal screw; and / or, a third clamping member is provided on the lower side of the U-shaped pull plate on the second longitudinal screw, so as to jointly clamp the U-shaped pull plate with the third clamping member at the upper end of the second longitudinal screw; and / or, a third clamping member is provided on the upper side of the lower clamping member on the second longitudinal screw, so as to jointly clamp the lower clamping member with the third clamping member at the lower end of the second longitudinal screw.

[0013] In some embodiments, both ends of the two upper clamping members are fixed to the upper fixed frame by a clamping bolt mechanism; both ends of the two upper clamping members are fixed to the lower fixed frame by a clamping bolt mechanism. The clamping bolt mechanism includes a transverse bolt, a second flat washer, a second anti-loosening disc spring washer, and a second nut.

[0014] Therefore, the transformer body structure provided by this utility model, by using insulating material for the upper clamp, can prevent the current flowing through the low-voltage leads of the winding from generating induced current inside the upper clamp. This effectively avoids eddy current losses, stray losses, and circulating current losses generated in the upper clamp, thereby improving transformer efficiency, reducing temperature rise, and extending transformer service life. Since the upper clamp uses insulating material, its strength may be reduced. This utility model addresses this by setting an upper fixed frame and fixing both ends of the two upper clamps to the upper fixed frame. The upper fixed frame can fix the positions of the two ends of the two upper clamps and support them in the lateral direction, thus maintaining the fixed positions of the two ends of the two upper clamps and preventing changes in their relative positions. This improves the deformation resistance of the two upper clamps and thus enhances the structural strength of the transformer body. In this way, while ensuring the structural strength of the transformer body, it effectively reduces eddy current losses, stray losses, and circulating current losses generated in the iron clamps.

[0015] Secondly, this utility model embodiment also provides a transformer, which includes an oil tank and the transformer body structure described in the first aspect. The transformer body structure is disposed within the oil tank.

[0016] In some embodiments, the tank includes a housing and a cover. The upper fixing frame of the transformer body structure is fixed integrally with the cover.

[0017] The transformer provided in this embodiment of the utility model has the same beneficial effects as the transformer body structure described above, and will not be repeated here. Attached Figure Description

[0018] Figure 1 : A partial structural diagram of a transformer body structure provided in an embodiment of this utility model;

[0019] Figure 2 : Right view of a transformer body structure provided in an embodiment of this utility model;

[0020] Figure 3 : A schematic diagram of an upper clamp and an upper fixing frame provided in an embodiment of this utility model;

[0021] Figure 4 : A schematic diagram of a lower clamp and a lower fixing frame provided in an embodiment of this utility model;

[0022] Figure 5 : A top view of a lower fixed frame provided in an embodiment of this utility model.

[0023] Among them, 1-upper clamp; 2-lower clamp; 3-upper fixed frame; 4-lower fixed frame; 5-first longitudinal screw; 6-second longitudinal screw; 7-clamping bolt mechanism; 8-U-shaped pull plate; 9-lower pad; 10-low voltage lead wire; 11-upper fixed frame; 12-pull rod fixing support plate; 13-first flat washer; 14-first anti-loosening disc spring washer; 15-first nut; 16-anti-loosening fastening nut; 17-transverse bolt; 18-first clamping component; 19-second clamping component; 20-third clamping component; 21-fourth clamping component; 22-second flat washer; 23-second anti-loosening disc spring washer; 24-second nut. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Example 1:

[0026] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a transformer body structure, which is applied in a transformer.

[0027] like Figure 1 and Figure 2As shown, the transformer core structure includes clamping components, specifically two upper clamping components 1 arranged side-by-side, each positioned on either side of the yoke on the core. The upper clamping components 1 are made of insulating material. The transformer core structure also includes a fixing frame assembly, comprising an upper fixing frame 11 located between the two upper clamping components 1. Both ends of the two upper clamping components 1 are fixed to the upper fixing frame 11, which provides lateral support to both ends of the two upper clamping components 1.

[0028] For example, the transformer body also includes an iron core and windings, with clamps used to clamp the iron core on both sides. Figure 3 As shown, the winding is wound on the core column of the iron core, and the winding has low-voltage lead 10 and high-voltage lead.

[0029] For example, the material of the upper clamp 1 can be wood, laminated cardboard, phenolic plastic, epoxy fabric board, etc.

[0030] With the above settings, even if current flows through the low-voltage lead 10, the current will not induce current inside the insulation material. Therefore, eddy current loss, stray loss and circulating current loss generated in the upper clamp 1 can be avoided, thereby improving the efficiency of the transformer and reducing the temperature rise. This is beneficial to improving the transformer's short-circuit withstand capability and extending the service life of the transformer.

[0031] In the prior art, the high-voltage lead and low-voltage lead 10 of the winding are led out from both sides outside the winding, and an insulation distance needs to be reserved between the high-voltage lead and the upper iron clamp, and between the low-voltage lead and the upper iron clamp.

[0032] In this embodiment, the upper clamp 1 is made of insulating material, which eliminates the need to consider the insulation distance between the high-voltage lead, the low-voltage lead and the upper clamp as in the prior art. Therefore, it is beneficial to reduce the space occupied by the transformer body structure, thereby reducing the volume of the transformer tank, reducing the amount of steel parts and oil used in the transformer, and thus reducing production costs.

[0033] For example, the upper fixed frame 11 can be formed by welding longitudinal and transverse steel plates, which has high strength and anti-deformation ability.

[0034] In this embodiment, combined with Figure 1 , Figure 2 and Figure 3 Understandably, in the front view of the transformer body structure, the upper fixing frame 11 is inverted U-shaped, and the two ends of the upper fixing frame 11 extend downward to the two ends of the two upper clamps 1; in the right view of the transformer body structure, the upper fixing frame 11 is rectangular.

[0035] For example, both ends of the two upper clamps 1 are fixed to the upper fixed frame 11 by fasteners (bolts, etc.).

[0036] By fixing both ends of the two upper clamping parts 1 to the upper fixed frame 11, the two upper clamping parts 1 and the upper fixed frame 11 form an integral structure. The upper fixed frame 11 can fix the positions of the two ends of the two upper clamping parts 1, thereby keeping the positions of the two ends of the two upper clamping parts 1 fixed and preventing the relative positions of the two ends of the two upper clamping parts 1 from changing. This improves the anti-deformation ability of the two upper clamping parts 1, thereby improving the structural strength of the transformer body and the vibration resistance of the transformer body.

[0037] Furthermore, in this embodiment, the transformer body structure, by using the upper fixing frame 11 to reinforce the two upper clamps 1, can also avoid problems such as reduced strength and easy deformation of the upper clamps 1 that may occur if the material of the upper clamps 1 is changed to insulating material.

[0038] Therefore, the transformer body structure provided in this embodiment of the present invention, by setting an upper fixed frame 11 and fixing both ends of the two upper clamping parts 1 to the upper fixed frame 11, can fix the positions of the two ends of the two upper clamping parts 1 through the upper fixed frame 11, and support the two ends of the two upper clamping parts 1 in the lateral direction, thereby keeping the positions of the two ends of the two upper clamping parts 1 fixed and preventing changes in the relative positions of the two ends of the two upper clamping parts 1, thereby improving the anti-deformation ability of the two upper clamping parts 1, and thus improving the structural strength of the transformer body. By setting the material of the upper clamping parts 1 to insulating material, the current flowing through the low-voltage lead 10 of the winding can be prevented from generating induced current inside the upper clamping parts 1, thus avoiding eddy current losses, stray losses and circulating current losses generated in the upper clamping parts 1, thereby improving the efficiency of the transformer and reducing the temperature rise, which is beneficial to extending the service life of the transformer.

[0039] In some embodiments, such as Figure 3 As shown, the upper fixed frame 11 is fixed to the tank cover of the transformer oil tank. The low-voltage leads 10 of the transformer body windings are led out from between the two upper clamps 1.

[0040] For example, the upper fixing frame 11 can be fixed to the cover of the transformer oil tank by welding, or by fasteners (bolts, etc.).

[0041] With the above configuration, the upper fixing frame 11 can be integrated with the cover of the transformer tank, and the cover of the transformer tank is fixed on the shell of the transformer tank. Thus, the upper clamp 1 is fixed on the transformer tank through the upper fixing frame 11, which further improves the overall strength of the transformer body structure and enhances the vibration resistance of the transformer body structure.

[0042] In the prior art, the high-voltage lead and low-voltage lead of the winding are led out from both sides outside the winding, and an insulation distance must be reserved between the high-voltage lead and the shell of the transformer tank, and between the low-voltage lead and the shell of the transformer tank.

[0043] In this embodiment, by leading the low-voltage lead 10 out between the two upper clamps 1, the insulation distance between the low-voltage lead and the transformer tank shell can be reduced, the space occupied by the low-voltage lead 10 can be reduced, and the clamping force of the upper clamps can be used to increase the mechanical force of the inner short circuit.

[0044] In some embodiments, such as Figure 2 and Figure 4 As shown, the clamping assembly also includes two lower clamping members 2 arranged side by side, positioned on both sides of the lower yoke of the iron core. The fixing frame assembly also includes a lower fixing frame 4 and lower pads 9. The lower fixing frame 4 is positioned between the two lower clamping members 2, and the lower pads 9 are positioned below the two lower clamping members 2. Both ends of the two lower clamping members 2 are fixed to the lower fixing frame 4 and the lower pads 9, so that the fixing frame 4 and the lower pads 9 jointly support the two ends of the two lower clamping members 2 in the lateral direction.

[0045] For example, the material of the lower clamp 2 can be a metal material such as iron to improve the strength of the lower clamp 2.

[0046] For example, such as Figure 2 and Figure 4 As shown, the lower fixed frame 4 comprises two separate sub-frames. The two sub-frames are respectively located at both ends of the lower clamp 2. Figure 4 and Figure 5 As shown, the side view of the subframe is rectangular, and the subframe is equipped with horizontal reinforcing ribs.

[0047] For example, both ends of the two lower clamping members 2 are fixed to the lower fixing frame 4 by fasteners (bolts, etc.). The two lower clamping members 2 are also fixed to the lower pads 9 by fasteners (bolts, etc.). The lower pads 9 abut against the bottom of the two lower clamping members 2 to support the two lower clamping members 2.

[0048] With the above configuration, the lower clamp 2, the lower fixing frame 4, and the lower pad 9 can be formed into a whole. Under the combined action of the lower fixing frame 4 and the lower pad 9, the positions of the two ends of the two lower clamps 2 can be fixed, which can prevent the relative positions of the two ends of the two lower clamps 2 from changing, thereby improving the deformation resistance of the two lower clamps 2, and thus improving the overall strength of the transformer body and the vibration resistance of the transformer body.

[0049] In some embodiments, such as Figure 3 As shown, the upper fixed frame 11 is provided with a tie rod fixing plate 12 at the position corresponding to the end of the upper clamp 1.

[0050] For example, such as Figure 3 As shown, the tie rod fixing plate 12 is a steel plate horizontally fixed to both sides of the upper fixed frame 11. There are four tie rod fixing plates 12, which are distributed near the four corners of the upper fixed frame 11.

[0051] like Figure 2 , Figure 3 and Figure 4 As shown, the transformer body structure also includes a longitudinal screw assembly, which includes a first longitudinal screw 5, located near the end of the upper clamp 1. The first longitudinal screw 5 passes through the tie rod fixing support plate 12, the upper clamp 1, and the lower clamp 2 sequentially from top to bottom. Both ends of the first longitudinal screw 5 are provided with first clamping members 18, and the upper clamp 1 is provided with a second clamping member 19. The first clamping members 18 clamp the tie rod fixing support plate 12 and the lower clamp 2, while the second clamping member 19 simultaneously clamps the upper surface of the upper clamp 1.

[0052] For example, there are four first longitudinal screws 5, which are respectively set at the two ends of the two upper clamps 1. The first longitudinal screws 5 are set in a one-to-one correspondence with the tie rod fixing plate 12.

[0053] The first clamping member 18 and the second clamping member 19 can both be nuts. By adjusting the relative position of the nuts on the first longitudinal screw 5, the clamping force of the first clamping member 18 when clamping the pull rod fixing plate 12 and the lower clamp 2 from both ends of the first longitudinal screw 5 can be adjusted, and the position and clamping force of the second clamping member 19 when clamping the upper clamp 1 downward can be adjusted.

[0054] With the above configuration, the first longitudinal screw 5 can be used to press the tie rod fixing plate 12 and the lower clamp 2, and the upper clamp 1 and the lower clamp 2 together, thereby forming the upper fixing frame 11, the upper clamp 1, the lower clamp 2, the lower fixing frame 4 and the lower pad 9 into a whole, improving the structural strength and stability of the transformer body structure.

[0055] In some embodiments, such as Figure 1 and Figure 3 As shown, the longitudinal screw assembly also includes a second longitudinal screw 6, which is vertically arranged between two adjacent windings. A U-shaped pull plate 8 is provided on the upper fixed frame 11 corresponding to the position of the second longitudinal screw 6. The second longitudinal screw 6 passes through the U-shaped pull plate 8, the upper clamp 1, and the lower clamp 2 sequentially from top to bottom. Both ends of the second longitudinal screw 6 are provided with third clamping members 20, and the upper side of the upper clamp 1 is provided with a fourth clamping member 21. The third clamping members 20 press the U-shaped pull plate 8 and the lower clamp 2, and the fourth clamping member 21 simultaneously presses the upper surface of the upper clamp 1.

[0056] For example, the transformer body structure has three windings, and two second longitudinal screws 6 are provided on both sides between two adjacent windings, so the number of second longitudinal screws 6 is also four. The number of U-shaped pull plates 8 is four, and the second longitudinal screws 6 and U-shaped pull plates 8 are provided in a one-to-one correspondence.

[0057] For example, the U-shaped pull plate 8 is set horizontally. The U-shaped pull plate 8 and the upper fixed frame 11 are an integral structure.

[0058] Both the third clamping member 20 and the fourth clamping member 21 can be nuts. By adjusting the relative position of the nuts on the second longitudinal screw 6, the position and clamping force of the third clamping member 20 when clamping the U-shaped pull plate 8 and the lower clamp 2 from both ends of the second longitudinal screw 6 can be adjusted, and the clamping force of the fourth clamping member 21 when clamping the upper clamp 1 downward can be adjusted.

[0059] With the above settings, the U-shaped pull plate 8, the lower clamp 2, and the upper clamp 1 can be pressed together by the second longitudinal screw 6, increasing the clamping force between the upper fixed frame 11 and the lower clamp 2, and the clamping force between the upper clamp 1 and the lower clamp 2, thereby further improving the structural strength and stability of the transformer body structure.

[0060] In some embodiments, combined with Figure 3 The second clamping member 19 and the fourth clamping member 21 both include a first flat washer 13, a first anti-loosening disc spring washer 14, a first nut 15 and an anti-loosening fastening nut 16 arranged sequentially from bottom to top.

[0061] The first flat washer 13 can distribute the clamping force, and the first anti-loosening disc spring washer 14 and the anti-loosening fastening nut 16 can prevent the first nut 15 from loosening, thereby improving the vibration resistance of the second clamping member 19 and the fourth clamping member 21, so as to maintain the continuous clamping force on the upper surface of the upper clamping member 1.

[0062] In some examples, both the first clamping member 18 and the third clamping member 20 include a third flat washer, a third anti-loosening disc spring washer, and a third nut.

[0063] In some embodiments, such as Figure 3 As shown, a first clamping member 18 is provided on the lower side of the tie rod fixing support plate 12 on the first longitudinal screw 5, so that together with the first clamping member 18 at the upper end of the first longitudinal screw 5, the tie rod fixing support plate 12 is clamped.

[0064] With the above settings, the position of the tie rod fixing plate 12 can be limited by the first clamping members 18 on the upper and lower sides of the tie rod fixing plate 12, so as to keep the relative position of the tie rod fixing plate 12 and the first longitudinal screw 5 stable, thereby improving the vibration resistance of the transformer body.

[0065] In some embodiments, such as Figure 4 As shown, a first clamping member 18 is provided on the upper side of the lower clamping member 2 on the first longitudinal screw 5, so that together with the first clamping member 18 at the lower end of the first longitudinal screw 5, the lower clamping member 2 is clamped.

[0066] With the above settings, the position of the lower clamp 2 can be limited by the first clamping members 18 on the upper and lower sides of the lower clamp 2, so as to keep the relative position of the lower clamp 2 and the first longitudinal screw 5 stable, thereby improving the vibration resistance of the transformer body.

[0067] In some embodiments, such as Figure 3 As shown, a third clamping member 20 is provided on the lower side of the U-shaped pull plate 8 on the second longitudinal screw 6, together with the third clamping member 20 at the upper end of the second longitudinal screw 6, to clamp the U-shaped pull plate 8.

[0068] With the above settings, the position of the U-shaped pull plate 8 can be limited by the third clamping members 20 on the upper and lower sides of the U-shaped pull plate 8, so as to keep the relative position of the U-shaped pull plate 8 and the second longitudinal screw 6 stable, thereby improving the vibration resistance of the transformer body.

[0069] In some embodiments, a third clamping member 20 is provided on the upper side of the lower clamping member 2 on the second longitudinal screw 6, so as to clamp the lower clamping member 2 together with the third clamping member 20 at the lower end of the second longitudinal screw 6.

[0070] With the above settings, the position of the lower clamp 2 can be limited by the third clamping members 20 on the upper and lower sides of the lower clamp 2, so as to keep the relative position of the lower clamp 2 and the second longitudinal screw 6 stable, thereby improving the vibration resistance of the transformer body.

[0071] In some embodiments, as shown in the figure, both ends of the two upper clamping members 1 are fixed to the upper fixed frame 11 by clamping bolt mechanism 7; both ends of the two upper clamping members 1 are fixed to the lower fixed frame 4 by clamping bolt mechanism 7.

[0072] The clamping bolt mechanism 7 includes a transverse bolt 17, a second flat washer 22, a second anti-loosening disc spring washer 23, and a second nut 24.

[0073] The installation methods of the transverse bolt 17, the second flat washer 22, the second anti-loosening disc spring washer 23, and the second nut 24 are all conventional settings in this field.

[0074] The above settings can prevent the clamping bolt mechanism 7 from loosening, enable the clamping bolt mechanism 7 to provide a stable clamping force, and improve the fixing strength of the clamping bolt mechanism 7.

[0075] Example 2:

[0076] This utility model embodiment also provides a transformer, which can be a wind farm nacelle transformer used in wind turbines. The transformer includes an oil tank and the transformer body structure as described in Embodiment 1. The transformer body structure is disposed inside the oil tank.

[0077] For example, the transformer core structure also includes an iron core and windings. The oil tank is filled with insulating oil, and the transformer core structure is immersed in the insulating oil in the oil tank.

[0078] The transformer body structure in Example 1 can avoid eddy current losses, stray losses, and circulating current losses generated in the upper clamp 1, thereby improving transformer efficiency and reducing temperature rise, which is beneficial to extending the service life of the transformer. Furthermore, the high structural strength of the transformer body structure can improve the transformer's vibration resistance.

[0079] In some embodiments, the tank includes a housing and a cover. The upper fixing frame 11 of the transformer body structure is fixed integrally with the cover.

[0080] For example, the tank cover is fixed to the tank housing by bolts.

[0081] The upper fixed frame 11 and the tank cover can be welded together to improve the fixing strength between the upper fixed frame 11 and the tank cover. After the tank cover is fixed to the tank shell, the strength of the transformer body structure is further improved by the tank cover, thereby improving the overall strength of the transformer and its vibration resistance.

[0082] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A transformer body structure, comprising clamps, characterized in that, The clamping component includes two upper clamping components (1) arranged side by side, and the two upper clamping components (1) are respectively arranged on both sides of the iron core yoke; the material of the upper clamping component (1) is an insulating material; The transformer body structure also includes a fixed frame assembly, which includes an upper fixed frame (11) located between the two upper clamps (1); Both ends of the two upper clamps (1) are fixed to the upper fixing frame (11), which is used to support the two ends of the two upper clamps (1) in the lateral direction.

2. The transformer body structure according to claim 1, characterized in that, The upper fixed frame (11) is fixed to the tank cover of the transformer oil tank; The low-voltage lead (10) of the winding of the transformer body structure is led out between the two upper clamps (1).

3. The transformer body structure according to claim 1, characterized in that, The clamp also includes two lower clamps (2) arranged side by side, and the two lower clamps (2) are arranged on both sides of the lower yoke of the iron core; The fixed frame assembly further includes a lower fixed frame (4) and a lower pad (9). The lower fixed frame (4) is disposed between the two lower clamps (2), and the lower pad (9) is disposed below the two lower clamps (2). Both ends of the two lower clamps (2) are fixed to the lower fixing frame (4) and the lower pad (9) so that the lower fixing frame (4) and the lower pad (9) jointly support the two ends of the two lower clamps (2) in the lateral direction.

4. The transformer body structure according to claim 3, characterized in that, The upper fixed frame (11) is provided with a tie rod fixing plate (12) at the position corresponding to the end of the upper clamp (1); The transformer body structure also includes a longitudinal screw assembly, which includes a first longitudinal screw (5) and the first longitudinal screw (5) is disposed near the end of the upper clamp (1); The first longitudinal screw (5) passes through the tie rod fixing plate (12), the upper clamp (1) and the lower clamp (2) from top to bottom; On the first longitudinal screw (5), both ends of the first longitudinal screw (5) are provided with first clamping members (18), and the upper clamp (1) is provided with a second clamping member (19) so that the first clamping member (18) can clamp the tie rod fixing plate (12) and the lower clamp (2), and the second clamping member (19) can simultaneously clamp the upper surface of the upper clamp (1).

5. The transformer body structure according to claim 4, characterized in that, The longitudinal screw assembly further includes a second longitudinal screw (6), which is vertically disposed between two adjacent windings; The upper fixed frame (11) is provided with a U-shaped pull plate (8) at the position corresponding to the second longitudinal screw (6); The second longitudinal screw (6) passes through the U-shaped pull plate (8), the upper clamp (1) and the lower clamp (2) from top to bottom; On the second longitudinal screw (6), both ends of the second longitudinal screw (6) are provided with third clamping members (20), and the upper clamp (1) is provided with a fourth clamping member (21) so as to clamp the U-shaped pull plate (8) and the lower clamp (2) by the third clamping member (20), and to clamp the upper surface of the upper clamp (1) by the fourth clamping member (21).

6. The transformer body structure according to claim 5, characterized in that, The second clamping member (19) and the fourth clamping member (21) both include a first flat washer (13), a first anti-loosening disc spring washer (14), a first nut (15) and an anti-loosening fastening nut (16) arranged sequentially from bottom to top.

7. The transformer body structure according to claim 5, characterized in that, On the first longitudinal screw (5), a first clamping member (18) is provided on the lower side of the tie rod fixing support plate (12) to jointly clamp the tie rod fixing support plate (12) with the first clamping member (18) at the upper end of the first longitudinal screw (5); and / or, On the first longitudinal screw (5), a first clamping member (18) is provided on the upper side of the lower clamp (2) to jointly clamp the lower clamp (2) with the first clamping member (18) at the lower end of the first longitudinal screw (5); and / or, On the second longitudinal screw (6), a third clamping member (20) is provided on the lower side of the U-shaped pull plate (8) to jointly clamp the U-shaped pull plate (8) with the third clamping member (20) at the upper end of the second longitudinal screw (6); and / or, On the second longitudinal screw (6), a third clamping member (20) is provided on the upper side of the lower clamping member (2) so as to clamp the lower clamping member (2) together with the third clamping member (20) at the lower end of the second longitudinal screw (6).

8. The transformer body structure according to claim 3, characterized in that, Both ends of the two upper clamps (1) are fixed to the upper fixed frame (11) by clamping bolt mechanism (7); both ends of the two upper clamps (1) are fixed to the lower fixed frame (4) by clamping bolt mechanism (7); The clamping bolt mechanism (7) includes a transverse bolt (17), a second flat washer, a second anti-loosening disc spring washer, and a second nut.

9. A transformer, characterized in that, include: tank; and, The transformer body structure according to any one of claims 1-8, wherein the transformer body structure is disposed inside the oil tank.

10. The transformer according to claim 9, characterized in that, The fuel tank includes a shell and a tank cover; The upper fixed frame (11) of the transformer body structure is fixed to the box cover as a whole.

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