A transformer oil tank magnetic shielding structure and a transformer

Abstract

The application provides a transformer oil tank magnetic shielding structure, which comprises a magnetic shielding block mounting plate installed on a transformer oil tank wall; the magnetic shielding block mounting plate is sequentially provided with vertical magnetic shielding blocks and flat magnetic shielding blocks from a center position to two ends; the vertical magnetic shielding blocks and the flat magnetic shielding blocks are respectively composed of a plurality of vertically placed magnetic shielding plates and flatly placed magnetic shielding plates; and the thickness of the flat magnetic shielding blocks is smaller than the height of the vertical magnetic shielding blocks. The application can greatly improve the shielding effect, complete the overall structure optimization of the oil tank magnetic shielding, and greatly reduce the material usage and processing amount.

Description

Technical Field

[0001] This invention belongs to the field of power system equipment manufacturing and transformer technology, and particularly relates to a magnetic shielding structure for transformer oil tanks. Background Technology

[0002] In modern large-capacity power transformers, magnetic shielding is typically installed on the inner wall of the tank to absorb leakage flux and reduce stray losses. However, traditional tank magnetic shielding structures are simplistic and not optimized based on the specific distribution of leakage flux. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a magnetic shielding structure for a transformer tank.

[0004] The first aspect of this invention discloses a magnetic shielding structure for a transformer tank; the structure includes:

[0005] A magnetic shielding block mounting plate is installed on the transformer tank wall;

[0006] The magnetic shielding block mounting plate is provided with vertical magnetic shielding blocks and flat magnetic shielding blocks arranged sequentially from the center to both ends; the vertical magnetic shielding blocks and flat magnetic shielding blocks are each composed of several vertically placed and flatly placed magnetic shielding plates.

[0007] The thickness of the flat magnetic shielding block is less than the height of the vertical magnetic shielding block.

[0008] According to a first aspect of the present invention, in a transformer tank magnetic shielding structure, the magnetic shielding block mounting plate is installed on the wall of the transformer tank at a position where the center line of the magnetic shielding block mounting plate is closest to the transformer coil.

[0009] According to a first aspect of the present invention, a magnetic shielding structure for a transformer tank is provided with a slot on the magnetic shielding block mounting plate, and the vertical magnetic shielding block and the flat magnetic shielding block are fixed in the slot by an interference fit.

[0010] According to a first aspect of the present invention, in a transformer tank magnetic shielding structure, the number of layers of the flat magnetic shielding block gradually decreases from the middle of the magnetic shielding mounting plate to both ends.

[0011] According to a first aspect of the present invention, a magnetic shielding structure for a transformer tank is provided, wherein the magnetic shielding plate is an electrical silicon steel sheet.

[0012] According to a first aspect of the present invention, a transformer tank magnetic shielding structure, wherein the vertical magnetic shielding block and the flat magnetic shielding block are respectively composed of a number of vertically placed and flatly placed magnetic shielding plates, is specifically formed by bonding multiple electrical silicon steel sheets together with epoxy resin.

[0013] According to a first aspect of the present invention, a transformer tank magnetic shielding structure is provided with an insulating device between the magnetic shielding block mounting plate and the transformer tank wall.

[0014] According to a first aspect of the present invention, a transformer tank magnetic shielding structure is provided, wherein the number of insulating devices is greater than or equal to a certain number, and each insulating device is provided with a gap between them.

[0015] According to a first aspect of the present invention, a transformer tank magnetic shielding structure is provided in which the magnetic shielding block mounting plate 1 is installed on the tank wall by a snap-fit.

[0016] The second aspect of the present invention discloses a transformer, wherein the transformer is provided with the transformer tank magnetic shielding structure described in any one of the first aspects of the present invention.

[0017] In summary, the proposed solution optimizes the overall structure of the magnetic shielding of the fuel tank, and can significantly reduce the amount of materials used and the amount of processing while ensuring the shielding effect. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the magnetic shielding structure of the fuel tank according to an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The first aspect of this invention discloses a magnetic shielding structure for a transformer tank. Figure 1 This is a schematic diagram of a transformer tank magnetic shielding structure according to an embodiment of the present invention, as shown below. Figure 1 As shown, the structure includes:

[0022] Magnetic shield mounting plate 1, which is installed on the transformer tank wall 5;

[0023] The magnetic shielding block mounting plate 1 is provided with vertical magnetic shielding blocks 3 and flat magnetic shielding blocks 4 arranged sequentially from the center to both ends; the vertical magnetic shielding blocks 3 and flat magnetic shielding blocks 4 are each composed of a number of vertically placed and flatly placed magnetic shielding plates.

[0024] Based on the distribution trend of leakage magnetic flux in the transformer tank, the magnetic shielding plates for different parts of the tank are designed separately, using different stacking methods of electrical steel strips and different shielding plate thicknesses. The number of layers of the flat magnetic shielding block 4 gradually decreases from the center of the magnetic shielding mounting plate 1 towards both ends. The magnetic shielding plate is thickest in the tank area closest to the coil 2, where the magnetic flux density is highest. In the tank area farther from the coil, where the magnetic flux density is lower, the thickness of the magnetic shielding plate is reduced. That is, the magnetic shielding block mounting plate 1 has vertical magnetic shielding blocks 3 and flat magnetic shielding blocks 4 arranged sequentially from the center to both ends, with the thickness of the flat magnetic shielding block 4 being less than the height of the vertical magnetic shielding block 3. This increases the penetration rate of magnetic flux on the surface of the magnetic shielding plate, further improving the shielding effect.

[0025] In some embodiments, the magnetic shielding plate 1 is installed on the transformer tank wall 5 at the position where the center line of the magnetic shielding plate 1 is closest to the transformer coil 2, so as to ensure that the thickness of the magnetic shielding plate gradually decreases according to the change of magnetic flux density, and the reduction of the thickness of the magnetic shielding plate on both sides of the magnetic shielding plate 1 is consistent with the change of magnetic flux density.

[0026] In some embodiments, the magnetic shielding block mounting plate 1 is provided with a slot, and the vertical magnetic shielding block 3 and the flat magnetic shielding block 4 are fixed in the slot by interference fit. The thickness of the magnetic shielding plate can be flexibly disassembled and adjusted by providing the slot.

[0027] In some embodiments, the magnetic shielding plate is an electrical silicon steel sheet, which has good shielding effect and low material cost.

[0028] In some embodiments, the vertical magnetic shielding block 3 and the flat magnetic shielding block 4 are respectively composed of several vertically placed and flatly placed magnetic shielding plates in the following specific way: multiple electrical silicon steel sheets are firmly bonded together with epoxy resin.

[0029] In some embodiments, an insulation device 6 is provided between the magnetic shielding block mounting plate 1 and the transformer tank wall 5.

[0030] In some embodiments, the number of insulating devices 6 is greater than or equal to two, and each insulating device 6 is spaced apart by a gap. This spacing further saves insulating material and reduces costs.

[0031] In some embodiments, the magnetic shielding block mounting plate 1 is mounted on the oil tank wall 5 by a snap-fit ​​7, and can be flexibly disassembled for easy maintenance.

[0032] The second aspect of the present invention discloses a transformer, wherein the transformer is provided with the transformer tank magnetic shielding structure described in any one of the first aspects of the present invention.

[0033] In summary, the proposed solution optimizes the overall structure of the magnetic shielding of the transformer tank, and can significantly reduce the amount of materials used and the amount of processing while ensuring the shielding effect.

[0034] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A magnetic shielding structure for a transformer tank, characterized in that, include: A magnetic shielding block mounting plate is installed on the wall of the transformer tank. The mounting plate has vertical and horizontal magnetic shielding blocks arranged sequentially from the center to both ends. Each vertical and horizontal magnetic shielding block consists of several vertically and horizontally placed magnetic shielding plates. The thickness of the horizontal magnetic shielding block is less than the height of the vertical magnetic shielding block. The mounting plate has slots in which the vertical and horizontal magnetic shielding blocks are fixed by interference fit, allowing for flexible disassembly and adjustment of the shielding plate thickness. The number of magnetic shielding plate layers gradually decreases from the center to both ends of the horizontal magnetic shielding block. Based on the distribution trend of leakage flux in the transformer tank, the magnetic shielding plates for different parts of the tank are designed separately, using different electrical steel strip stacking methods and shielding plate thicknesses.

2. The transformer tank magnetic shielding structure according to claim 1, characterized in that, The magnetic shielding block mounting plate is installed on the transformer tank wall at the position where the center line of the magnetic shielding block mounting plate is closest to the transformer coil.

3. The transformer tank magnetic shielding structure according to claim 1, characterized in that, The magnetic shielding plate is made of electrical silicon steel sheet.

4. The transformer tank magnetic shielding structure according to claim 3, characterized in that, The vertical magnetic shielding block and the flat magnetic shielding block are respectively composed of several vertically placed and flatly placed magnetic shielding plates. The specific method is that multiple electrical silicon steel sheets are firmly bonded together with epoxy resin.

5. The transformer tank magnetic shielding structure according to claim 1, characterized in that, An insulation device is provided between the magnetic shielding block mounting plate and the transformer tank wall.

6. The transformer tank magnetic shielding structure according to claim 5, characterized in that, The number of insulating devices is greater than or equal to two, and each insulating device is provided with a gap between them.

7. A transformer tank magnetic shielding structure according to claim 5, characterized in that, The magnetic shield mounting plate is installed on the tank wall by snap-fit.

8. A transformer, characterized in that, The transformer tank is equipped with a magnetic shielding structure as described in any one of claims 1 to 7.

Images