CN214505212U

CN214505212U - Transformer iron core structure

Info

Publication number: CN214505212U
Application number: CN202120214509.1U
Authority: CN
Inventors: 张亦驰; 赵世鑫; 陈婧媛; 杨喆; 赵朔; 贾佳
Original assignee: Fangcheng Power Supply Co Of State Grid Henan Electric Power Co; Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Fangcheng Power Supply Co Of State Grid Henan Electric Power Co; Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-10-26
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses a transformer core structure belongs to transformer core technical field. The transformer core structure comprises an iron core body, clamping pieces, screw rods and pulling plates, wherein the iron core body is in a shape like a Chinese character 'ri', the iron core body is fixed on the clamping pieces, the clamping pieces are channel steel with mounting holes, the clamping pieces comprise two lower clamping pieces and two upper clamping pieces, the two lower clamping pieces and the two upper clamping pieces are connected through the screw rods respectively, the number of the screw rods is 8, the lower clamping pieces and the upper clamping pieces at the same side are connected through the pulling plates, and the number of the pulling plates is 6. The utility model discloses the centre-to-centre spacing of messenger's iron core and the height of iron core all reduce, have reduced the weight of iron core, will go up folder and folder down through addding the arm-tie and couple together, can not increase the whole volume of transformer, further the cost is reduced.

Description

Transformer iron core structure

Technical Field

The utility model relates to a transformer core technical field, concretely relates to transformer core structure.

Background

With the continuous development of the electric power industry in China, the capacity of a power grid is continuously increased, and a power transformer is widely used as an important component of the current power system. The iron core is used as a core component of the power transformer, and the structure and the performance of the iron core play an important role in the working capacity of the power transformer. The traditional iron core is easy to deform, wear, loosen and other mechanical structure problems, and is easy to cause serious electrical faults such as winding short circuit, open circuit, partial discharge, iron core multipoint grounding and the like. There is a need for an improved structure.

The utility model discloses a stable form transformer core is disclosed in No. CN108335869A in the bulletin of authorizing, including the base support board, the upside of base support board has the folder through the bolt fastening, there is the fan upper surface of folder through bolted connection, threaded hole is seted up to the side of folder, the internal connection of screw hole has the dead lever, the slip hole has been seted up to the one end of dead lever, and the other end is connected with limit nut, the internal connection in slip hole has the anchorage bar, limit nut's surface thread groove has been seted up, limit nut's surface border position department is provided with the stopper. Because the utility model discloses transformer core's cross-section is square, and the centre-to-centre spacing of iron core and the highly all great of iron core, so iron core weight is heavier, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to solve the technical problem that a transformer core structure is provided, reduces the no-load loss of iron core effectively, reduces iron core weight, reduce cost.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a transformer core structure, includes iron core body, folder, screw rod and arm-tie, its characterized in that: the iron core body is the shape of Chinese character ri, the iron core body is fixed on the folder, the folder is the channel-section steel that has the mounting hole, the folder includes folder and two last folders under two, down between the folder with use respectively between two last folders the screw rod is connected, the number of screw rod is 8, the homonymy down the folder with go up and use between the folder the arm-tie is connected, the number of arm-tie is 6.

The iron core body is composed of a plurality of laminated layers which are sequentially laminated, each laminated layer comprises upper yoke laminations, lower yoke laminations, middle column laminations and side column laminations at two sides, the number of the laminated layers is the same as that of the laminated layers, the upper yoke laminations and the lower yoke laminations are of a trapezoidal structure, and V-shaped grooves are formed in the middles of the upper yoke laminations and the lower yoke laminations; the side column lamination is of a trapezoidal structure; sharp corners matched with the V-shaped grooves are arranged at two ends of the middle column lamination; the angles of the V-shaped groove and the sharp angle are both larger than 80 degrees and smaller than 100 degrees.

The angles of the V-shaped groove and the sharp corner are both 90 degrees.

The upper yoke lamination and the lower yoke lamination are correspondingly arranged and have the same cross section.

The upper yoke lamination, the lower yoke lamination, the middle column lamination and the side column laminations on the two sides are all made of silicon steel sheets, and resin glue layers are coated on the upper surfaces of the upper yoke lamination, the lower yoke lamination, the middle column lamination and the side column laminations on the two sides.

The upper surface of the upper clamping piece is provided with 4 hanging rings; the lower surface of the lower clamping piece is provided with a base supporting plate, the base supporting plate is of a square steel structure, and the upper side of the base supporting plate is fixed to the lower clamping piece through a bolt.

The utility model has the advantages that: the iron core body in the transformer iron core structure of the utility model is in a shape of Chinese character 'ri', which reduces the center distance and height of the iron core, reduces the magnetic circuit of the iron core and reduces the no-load loss of the iron core; the iron core body is clamped and fixed by the upper clamping piece and the lower clamping piece, and the two lower clamping pieces and the two upper clamping pieces are connected through a plurality of groups of screw rods, so that the uniform and effective clamping of iron core body accessories is ensured; the upper clamping piece and the lower clamping piece are connected by additionally arranging the pulling plate, so that the integral volume of the transformer cannot be increased; the upper yoke lamination, the lower yoke lamination, the middle column lamination and the side column laminations at two sides are all provided with fabrication holes convenient for assembling and positioning, so that a plurality of pieces can be stacked at one time, the operation is simple, the assembly is convenient, the assembly efficiency is greatly improved, and the labor cost is saved; the utility model discloses transformer core's compact structure, reasonable in design, low in manufacturing cost, the product heat dissipation is fast, the intensification is slow, the reliability is high, energy loss is low is fit for extensively promoting.

Drawings

Fig. 1 is the structural schematic diagram of the transformer core structure of the present invention.

Fig. 2 is a schematic structural diagram of the iron core body of the present invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to fig. 1 and fig. 2 of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.

The reference numerals in fig. 1 denote:

1. a base support plate; 2. an upper clamp; 3. a lower clamp; 4. an iron core body; 5. a screw; 6. pulling a plate; 7. a hoisting ring; 8. penetrating a yoke insulating tube; 9. an upper yoke lamination; 10. a lower yoke lamination; 11. side column lamination; 12. laminating the middle columns; 13. and a through hole.

The first embodiment is as follows:

fig. 1 shows a transformer core structure, which includes a core body 4, a clip, a screw 5 and a pulling plate 6. As shown in fig. 2, the core body 4 is in a shape of a Chinese character 'ri', the core body 4 is composed of a plurality of laminated layers which are sequentially laminated, each laminated layer includes an upper yoke lamination 9, a lower yoke lamination 10, a middle column lamination 12 and side column laminations 11 at two sides, the upper yoke lamination 9 and the lower yoke lamination 10 are correspondingly arranged and have the same cross section, the upper yoke lamination 9 and the lower yoke lamination 10 are in a trapezoidal structure, and a V-shaped groove is arranged between the upper yoke lamination 9 and the lower yoke lamination 10; the side column lamination 11 is also in a trapezoidal structure; sharp corners matched with the V-shaped grooves are arranged at two ends of the middle column lamination 12; the angle of V-arrangement groove and center pillar closed angle is set to 90 degrees, the acute angle of upper yoke lamination 9 and lower yoke lamination 10 is set to 45 degrees, and its obtuse angle is set to 135 degrees, the acute angle of both sides side post lamination 11 is set to 45 degrees, and the obtuse angle is set to 135 degrees. The upper yoke lamination 9, the lower yoke lamination 10, the center pillar lamination 12 and the side pillar laminations 11 at two sides are all made of silicon steel sheets, and resin glue layers are coated on the upper surfaces of the silicon steel sheets.

Go up yoke lamination 9 with set up through-hole 13 on the yoke lamination 10 down, the folder is the channel-section steel that has the mounting hole, iron core body 4 passes by wearing yoke insulating tube 8 through-hole 13 with the mounting hole is fixed on the folder, the folder includes folder 2 and two folder 3 down on two that are parallel to each other, on two between the folder 2 with two down use respectively between the folder 3 the screw rod 5 is connected, the number of pieces of screw rod 5 is 8, the homonymy go up folder 2 with down use between the folder 3 the arm-tie 6 is connected, the number of arm-tie 6 is 6.

Example two:

as shown in fig. 1, the transformer core structure described in this embodiment is an improvement on the first embodiment, rings 7 are fixed to the upper surface of the upper clip 2 by welding, and the number of the rings 7 is 4; the bottom surface of lower folder 3 sets up base backup pad 1, the number of base backup pad 1 is 2, base backup pad 1 adopts square steel structure, the upside of base backup pad 1 passes through the bolt fastening folder 3 down.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a transformer core structure, includes iron core body, folder, screw rod and arm-tie, its characterized in that: the iron core body is in a shape of Chinese character 'ri', the iron core body is fixed on the clamping pieces, the clamping pieces are channel steel with mounting holes, the clamping pieces comprise two lower clamping pieces and two upper clamping pieces, the two lower clamping pieces and the two upper clamping pieces are connected through the screw rods respectively, the number of the screw rods is 8, the lower clamping pieces and the upper clamping pieces on the same side are connected through the pulling plates, and the number of the pulling plates is 6;

the iron core body is composed of a plurality of laminated layers which are sequentially laminated, each laminated layer comprises upper yoke laminations, lower yoke laminations, middle column laminations and side column laminations at two sides, the number of the laminated layers is the same as that of the laminated layers, the upper yoke laminations and the lower yoke laminations are of a trapezoidal structure, and V-shaped grooves are formed in the middles of the upper yoke laminations and the lower yoke laminations; the side column lamination is of a trapezoidal structure; sharp corners matched with the V-shaped grooves are arranged at two ends of the middle column lamination; the angles of the V-shaped groove and the sharp corner are both more than 80 degrees and less than 100 degrees;

the upper yoke lamination and the lower yoke lamination are provided with through holes, and the iron core body is fixed on the clamping piece through the through holes and the mounting holes by a yoke-penetrating insulating tube.

2. The transformer core structure of claim 1, wherein: the angles of the V-shaped groove and the sharp corner are both 90 degrees.

3. The transformer core structure of claim 1, wherein: the upper yoke lamination and the lower yoke lamination are correspondingly arranged and have the same cross section.

4. The transformer core structure of claim 1, wherein: the upper yoke lamination, the lower yoke lamination, the middle column lamination and the side column laminations on the two sides are all made of silicon steel sheets, and resin glue layers are coated on the upper surfaces of the upper yoke lamination, the lower yoke lamination, the middle column lamination and the side column laminations on the two sides.

5. The transformer core structure of claim 1, wherein: the upper surface of the upper clamping piece is provided with 4 hanging rings; the lower surface of the lower clamping piece is provided with a base supporting plate, the base supporting plate is of a square steel structure, and the upper side of the base supporting plate is fixed to the lower clamping piece through a bolt.