Transformer body structure and transformer

Abstract

The invention discloses a transformer body structure and a transformer, which can effectively reduce eddy current loss, stray loss and circulating current loss generated in an iron clamp on the basis of ensuring the strength of the transformer body structure. The transformer body structure comprises a clamping piece, the clamping piece comprises two upper clamping pieces arranged side by side, and the two upper clamping pieces are arranged on the two sides of an upper iron yoke of an iron core respectively; and the upper clamping piece is made of an insulating material. The transformer body structure further comprises a fixing frame assembly, the fixing frame assembly comprises an upper fixing frame, and the upper fixing frame is located between the two upper clamping pieces. The two ends of the two upper clamping pieces are fixed to the upper fixing frame, and the upper fixing frame is used for supporting the two ends of the two upper clamping pieces in the transverse direction.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer manufacturing, and in particular relates to a transformer body structure and a transformer. Background Art

[0002] Transformers for new energy sources, especially wind farm nacelle transformers used in wind turbines, are in a long-term vibration state due to the working characteristics of wind turbine blades. The transformers installed in the nacelle are in a long-term vibration state throughout their life cycle, and higher vibration resistance requirements are placed on the transformer body.

[0003] Conventional transformers typically use iron clamps to enhance their structural strength and vibration resistance. However, due to the relatively low generator-side voltage of wind turbines (around 1 kV), the transformer inputs carry high low-voltage currents (over 3000 A). These high-current leads easily induce significant eddy current, stray, and circulating current losses in conventional iron clamps, reducing transformer efficiency, increasing temperature rise, and shortening the transformer's service life.

[0004] Therefore, how to reduce the eddy current loss, stray loss and circulating current loss generated in the iron clamps while ensuring the structural strength of the transformer body is a problem that needs to be solved at present. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a transformer body structure and a transformer in response to the above-mentioned deficiencies in the prior art, which can effectively reduce the eddy current loss, stray loss and circulating current loss generated in the iron clamps while ensuring the structural strength of the transformer body.

[0006] In a first aspect, an embodiment of the present invention provides a transformer body structure, comprising a clamp, wherein the clamp comprises two upper clamps arranged side by side, the two upper clamps being respectively arranged on either side of an iron yoke on an iron core; the upper clamps being made of an insulating material. The transformer body structure also comprises a fixed frame assembly, wherein the fixed frame assembly comprises an upper fixed frame, wherein the upper fixed frame is positioned between the two upper clamps. Both ends of the two upper clamps are fixed to the upper fixed frame, and the upper fixed frame is used to support the ends of the two upper clamps in a lateral direction.

[0007] In some embodiments, the upper fixing frame is fixed to a cover of a transformer oil tank. The low-voltage lead of the winding of the transformer body structure is led out from between the two upper clamps.

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

[0009] In some embodiments, a pull rod fixing support plate is provided at a position of the upper fixing frame corresponding to the end of the upper clamp. The transformer body structure also includes a longitudinal screw assembly, and the longitudinal screw assembly includes a first longitudinal screw, and the first longitudinal screw is provided near the end of the upper clamp. The first longitudinal screw passes through the pull rod fixing support plate, the upper clamp and the lower clamp in sequence from top to bottom. On the first longitudinal screw, a first pressing member is provided at both ends of the first longitudinal screw, and a second pressing member is provided on the upper side of the upper clamp, so as to press the pull rod fixing support plate and the lower clamp through the first pressing member, and simultaneously press the upper surface of the upper clamp through the second pressing member.

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

[0011] In some embodiments, the second pressing member and the fourth pressing member each include a first flat washer, a first anti-loosening disc spring washer, a first nut and an anti-loosening fastening nut, which are arranged in sequence from bottom to top.

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

[0013] In some embodiments, both ends of the two upper clamps are fixed to the upper fixing frame via a clamping bolt mechanism, and both ends of the two upper clamps are fixed to the lower fixing frame via 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 the embodiment of the present invention can avoid the current flowing in the low-voltage lead of the winding from generating an induced current inside the upper clamp by setting the material of the upper clamp to an insulating material, thereby effectively avoiding the eddy current loss, stray loss and circulating current loss generated in the upper clamp, thereby improving the efficiency of the transformer and reducing the temperature rise, which is conducive to extending the service life of the transformer; since the upper clamp is made of insulating material, its strength may be reduced. The present invention sets an upper fixed frame and fixes both ends of the two upper clamps on the upper fixed frame. The upper fixed frame can be used to fix the positions of the two ends of the two upper clamps, and the two ends of the two upper clamps are supported in the lateral direction, thereby maintaining the fixed positions of the two ends of the two upper clamps, preventing the relative positions of the two ends of the two upper clamps from changing, thereby improving the anti-deformation ability of the current two upper clamps, and then improving the structural strength of the transformer body. In this way, on the basis of ensuring the structural strength of the transformer body, the eddy current loss, stray loss and circulating current loss generated in the iron clamp can be effectively reduced.

[0015] In a second aspect, an embodiment of the present invention further provides a transformer, comprising an oil tank and the transformer body structure of the first aspect, wherein the transformer body structure is disposed in the oil tank.

[0016] In some embodiments, the oil tank includes a shell and a tank cover, and the upper fixing frame of the transformer body structure is fixed to the tank cover as a whole.

[0017] The transformer provided by the embodiment of the present invention has the same beneficial effects as the above-mentioned transformer body structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A partial structural diagram of a transformer body structure provided by an embodiment of the present invention;

[0019] Figure 2 : A right side view of a transformer body structure provided by an embodiment of the present invention;

[0020] Figure 3 : A schematic diagram of an upper clamping member and an upper fixing frame provided in an embodiment of the present invention;

[0021] Figure 4 : A schematic diagram of a lower clamping member and a lower fixing frame provided in an embodiment of the present invention;

[0022] Figure 5 : A top view of a lower fixing frame provided in an embodiment of the present invention.

[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; 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 member; 19-second clamping member; 20-third clamping member; 21-fourth clamping member; 22-second flat washer; 23-second anti-loosening disc spring washer; 24-second nut. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is 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, an embodiment of the present invention provides a transformer body structure, which is applied in a transformer.

[0027] like Figure 1 and Figure 2 As shown, the transformer body structure includes a clamp, which comprises two upper clamps 1 arranged side by side, one on each side of the iron yoke on the core. The upper clamps 1 are made of 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 fixed frame 11, which is used to support the ends of the two upper clamps 1 in the lateral direction.

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

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

[0030] Through the above-mentioned setting, even if current flows through the low-voltage lead 10, the current will not generate induced current inside the insulating material, so the 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, which is beneficial to improving the short-circuit resistance of the transformer and extending the service life of the transformer.

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

[0032] The upper clamp 1 in this embodiment is made of insulating material, so there is no need to consider the insulation distance between the high-voltage lead, the low-voltage lead and the upper iron 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 oil tank, reducing the amount of steel parts and oil used in the transformer, and thus reducing production costs.

[0033] For example, the upper fixing frame 11 may be formed by welding longitudinal and transverse steel plates, and has high strength and anti-deformation capability.

[0034] In this embodiment, combined with Figure 1 、 Figure 2 and Figure 3 It can be understood that in the front view of the transformer body structure, the shape of the upper fixed frame 11 is an inverted U-shape, and the two ends of the upper fixed frame 11 extend downward to between the two ends of the two upper clamps 1; in the right view of the transformer body structure, the shape of the upper fixed frame 11 is a rectangle.

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

[0036] By fixing both ends of the two upper clamps 1 on the upper fixed frame 11, the two upper clamps 1 and the upper fixed frame 11 form an integrated structure, and the positions of the two ends of the two upper clamps 1 can be fixed by the upper fixed frame 11, thereby keeping the positions of the two ends of the two upper clamps 1 fixed, preventing the relative positions of the two ends of the two upper clamps 1 from changing, thereby improving the anti-deformation ability of the two upper clamps 1, and then improving the structural strength of the transformer body and improving the vibration resistance of the transformer body.

[0037] Moreover, the transformer body structure in this embodiment can also avoid problems such as reduced strength and easy deformation of the upper clamps 1 that may be caused by changing the material of the upper clamps 1 to insulating material by reinforcing the two upper clamps 1 using the upper fixing frame 11.

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

[0039] In some embodiments, as Figure 3 As shown, the upper fixing frame 11 is fixed on the cover of the transformer oil tank. The low-voltage lead 10 of the winding of the transformer body structure is led out from between the two upper clamps 1.

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

[0041] Through the above arrangement, the upper fixing frame 11 can be integrated with the cover of the transformer oil tank, and the cover of the transformer oil tank is fixed on the shell of the transformer oil tank, so that the upper clamp 1 is fixed to the transformer oil tank through the upper fixing frame 11, further improving the overall strength of the transformer body structure and improving the vibration resistance of the transformer body structure.

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

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

[0044] In some embodiments, as Figure 2 and Figure 4 As shown, the clamping assembly further includes two lower clamping members 2 arranged side by side, disposed on either side of the lower iron yoke of the core. The fixed frame assembly further includes a lower fixed frame 4 and lower padding feet 9, disposed between the two lower clamping members 2. The lower fixed frame 4 is disposed below the two lower clamping members 2, with both ends of the lower clamping members 2 secured to the lower fixed frame 4 and the lower padding feet 9. The fixed frame 4 and the lower padding feet 9 provide transverse support to the ends of the two lower clamping members 2.

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

[0046] For example, Figure 2 and Figure 4 As shown, the lower fixed frame 4 includes two separate sub-frames. The two sub-frames are respectively arranged at the two ends of the lower clamp 2. Figure 4 and Figure 5 As shown, the side view of the sub-frame is rectangular, and transverse reinforcing ribs are provided on the sub-frame.

[0047] Exemplarily, both ends of the two lower clamps 2 are fixed to the lower fixing frame 4 by fasteners (bolts, etc.). The two lower clamps 2 are also fixed to the lower pads 9 by fasteners (bolts, etc.). The lower pads 9 abut against the bottoms of the two lower clamps 2 to support the two lower clamps 2.

[0048] Through the above-mentioned setting, the lower clamping member 2, the lower fixed frame 4 and the lower pad 9 can be formed into a whole, so that the positions of the two ends of the two lower clamping members 2 can be fixed under the joint action of the lower fixed frame 4 and the lower pad 9, which can prevent the relative positions of the two ends of the two lower clamping members 2 from changing, thereby improving the anti-deformation ability of the two lower clamping members 2, and then improving the overall strength of the transformer body and the vibration resistance of the transformer body.

[0049] In some embodiments, as Figure 3 As shown, a pull rod fixing support plate 12 is provided at a position of the upper fixing frame 11 corresponding to the end of the upper clamping member 1 .

[0050] For example, Figure 3 As shown, the tie rod fixing support plate 12 is a steel plate fixed horizontally on both sides of the upper fixed frame 11. The number of the tie rod fixing support plates 12 is four, and the four tie rod fixing support plates 12 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, which is disposed 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 from top to bottom. A first pressing member 18 is provided at each end of the first longitudinal screw 5, and a second pressing member 19 is provided on the upper side of the upper clamp 1. The first pressing member 18 compresses the tie rod fixing support plate 12 and the lower clamp 2, and the second pressing member 19 simultaneously compresses the upper surface of the upper clamp 1.

[0052] Exemplarily, the number of the first longitudinal screws 5 is four, and the four first longitudinal screws 5 are respectively arranged at the two ends of the two upper clamps 1 , and the first longitudinal screws 5 are arranged in a one-to-one correspondence with the pull rod fixing support plates 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 on the pull rod fixing support plate 12 and the lower clamping member 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 on the upper clamping member 1 downward can be adjusted.

[0054] Through the above-mentioned arrangement, the first longitudinal screw 5 can be used to press the pull rod fixing support plate 12 and the lower clamp 2, and the upper clamp 1 and the lower clamp 2, so that the upper fixing frame 11, the upper clamp 1, the lower clamp 2, the lower fixing frame 4 and the lower pad 9 are formed into a whole, thereby improving the structural strength and stability of the transformer body structure.

[0055] In some embodiments, 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 at the position of the upper fixed frame 11 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, a third clamping member 20 is provided at both ends of the second longitudinal screw 6, and a fourth clamping member 21 is provided on the upper side of the upper clamp 1, so as to clamp the U-shaped pull plate 8 and the lower clamp 2 through the third clamping member 20, and simultaneously clamp the upper surface of the upper clamp 1 through the fourth clamping member 21.

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

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

[0058] The third clamping member 20 and the fourth clamping member 21 can both 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 pressing 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 pressing the upper clamp 1 downward can be adjusted.

[0059] Through the above arrangement, the U-shaped pull plate 8, the lower clamp 2, and the upper clamp 1 can be compressed by the second longitudinal screw 6, thereby 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 Figure 3 The second pressing member 19 and the fourth pressing 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, which are arranged in sequence from bottom to top.

[0061] The first flat washer 13 can disperse 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 to maintain continuous clamping ability on the upper surface of the upper clamp 1.

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

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

[0064] Through the above arrangement, the position of the tie rod fixing plate 12 can be limited by the first pressing 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, as Figure 4 As shown, a first pressing member 18 is provided on the upper side of the lower clamping member 2 on the first longitudinal screw 5 to press the lower clamping member 2 together with the first pressing member 18 at the lower end of the first longitudinal screw 5 .

[0066] With the above arrangement, the position of the lower clamping member 2 can be limited by the first pressing members 18 on the upper and lower sides of the lower clamping member 2, thereby maintaining the relative position of the lower clamping member 2 and the first longitudinal screw 5 stable, thereby improving the vibration resistance of the transformer body.

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

[0068] Through the above arrangement, the position of the U-shaped pull plate 8 can be limited by the third pressing 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 pressing member 20 is provided on the upper side of the lower clamping member 2 on the second longitudinal screw 6 to press the lower clamping member 2 together with the third pressing member 20 at the lower end of the second longitudinal screw 6 .

[0070] Through the above arrangement, the position of the lower clamping member 2 can be limited by the third pressing members 20 on the upper and lower sides of the lower clamping member 2, so as to keep the relative position of the lower clamping member 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 clamps 1 are fixed to the upper fixed frame 11 by the clamping bolt mechanism 7; both ends of the two upper clamps 1 are fixed to the lower fixed frame 4 by the 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 the field.

[0074] Through the above arrangement, the clamping bolt mechanism 7 can be prevented from loosening, so that the clamping bolt mechanism 7 can provide a stable clamping force, thereby improving the fixing strength of the clamping bolt mechanism 7.

[0075] Example 2:

[0076] An embodiment of the present invention further provides a transformer, which may be a wind farm nacelle transformer applied to a wind turbine, and includes an oil tank and the transformer body structure of embodiment 1. The transformer body structure is disposed in the oil tank.

[0077] Exemplarily, the transformer body structure further includes an iron core and windings.

[0078] Exemplarily, the oil tank is filled with insulating oil, and the transformer body structure is immersed in the insulating oil in the oil tank.

[0079] The transformer body structure of Example 1 can avoid eddy current loss, stray loss, and circulating current loss generated in the upper clamp 1, thereby improving transformer efficiency and reducing temperature rise, which is beneficial for extending the transformer's service life. Furthermore, the transformer body structure has high structural strength, which can improve the transformer's vibration resistance.

[0080] In some embodiments, the oil tank includes a shell and a tank cover. The upper fixing frame 11 of the transformer body structure is fixed to the tank cover as a whole.

[0081] Exemplarily, the tank cover is fixed to the housing of the fuel tank by bolts.

[0082] The upper fixing frame 11 and the tank cover can be fixed together by welding to improve the fixing strength between the upper fixing frame 11 and the tank cover. After the tank cover is fixed to the oil tank shell, the tank cover further improves the strength of the transformer body structure, thereby improving the overall strength of the transformer and improving the transformer's vibration resistance.

[0083] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A transformer body structure, comprising a clamp, characterized in that: The clamping piece comprises two upper clamping pieces (1) arranged side by side, and the two upper clamping pieces (1) are respectively arranged on both sides of the iron yoke on the iron core; the material of the upper clamping piece (1) is an insulating material; The transformer body structure further comprises a fixed frame assembly, wherein the fixed frame assembly comprises an upper fixed frame (11), and the upper fixed frame (11) is located between the two upper clamps (1); Both ends of the two upper clamps (1) are fixed on the upper fixing frame (11), and the upper fixing frame (11) is used to support the two ends of the two upper clamps (1) in the transverse direction.

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

3. The transformer body structure according to claim 1, characterized in that: The clamping member further comprises two lower clamping members (2) arranged side by side, and the two lower clamping members (2) are arranged on both sides of the lower iron yoke of the iron core; The fixed frame assembly further comprises a lower fixed frame (4) and a lower pad (9), wherein the lower fixed frame (4) is arranged between the two lower clamping members (2), and the lower pad (9) is arranged below the two lower clamping members (2); Both ends of the two lower clamps (2) are fixed on the lower fixing frame (4) and the lower padding foot (9), so that the lower fixing frame (4) and the lower padding foot (9) can jointly support the two ends of the two lower clamps (2) in the transverse direction.

4. The transformer body structure according to claim 3, characterized in that: The upper fixing frame (11) is provided with a pull rod fixing support plate (12) at a position corresponding to the end of the upper clamping member (1); The transformer body structure further comprises a longitudinal screw assembly, wherein the longitudinal screw assembly comprises a first longitudinal screw (5), and the first longitudinal screw (5) is arranged near the end of the upper clamp (1); The first longitudinal screw (5) passes through the pull rod fixing support plate (12), the upper clamping piece (1) and the lower clamping piece (2) in sequence from top to bottom; On the first longitudinal screw (5), both ends of the first longitudinal screw (5) are provided with a first pressing member (18), and the upper side of the upper clamp (1) is provided with a second pressing member (19), so as to press the pull rod fixing support plate (12) and the lower clamp (2) through the first pressing member (18), and simultaneously press the upper surface of the upper clamp (1) through the second pressing member (19).

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

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

7. The transformer body structure according to claim 5, characterized in that: A first pressing member (18) is provided on the lower side of the tie rod fixing support plate (12) on the first longitudinal screw rod (5) to press the tie rod fixing support plate (12) together with the first pressing member (18) at the upper end of the first longitudinal screw rod (5); and / or, On the first longitudinal screw (5), a first pressing member (18) is provided on the upper side of the lower clamping member (2) to press the lower clamping member (2) together with the first pressing member (18) at the lower end of the first longitudinal screw (5); and / or, A third pressing member (20) is provided on the lower side of the U-shaped pull plate (8) on the second longitudinal screw (6) to press the U-shaped pull plate (8) together with the third pressing member (20) at the upper end of the second longitudinal screw (6); and / or, On the second longitudinal screw (6), a third pressing member (20) is provided on the upper side of the lower clamping member (2) to press the lower clamping member (2) together with the third pressing 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) via a clamping bolt mechanism (7); both ends of the two upper clamps (1) are fixed to the lower fixed frame (4) via a clamping bolt mechanism (7); The clamping bolt mechanism (7) comprises 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 to 8 is arranged in the oil tank.

10. The transformer according to claim 9, characterized in that The oil tank comprises a shell and a tank cover; The upper fixing frame (11) of the transformer body structure is fixed integrally with the box cover.

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