CN216597251U

CN216597251U - Triangular iron core dry-type transformer

Info

Publication number: CN216597251U
Application number: CN202122989888.4U
Authority: CN
Inventors: 邬小勇
Original assignee: Wuxi Yinow Electric Equipment Co ltd
Current assignee: Wuxi Yinow Electric Equipment Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-05-24
Anticipated expiration: 2031-12-01

Abstract

The utility model relates to the technical field of transformer manufacturing, and discloses a triangular iron core dry-type transformer which comprises a triangular iron core, an upper clamping piece, a lower clamping piece and a coil, wherein the upper clamping piece is arranged on the triangular iron core; the upper clamping piece and the lower clamping piece are respectively fixed at the top and the bottom of the triangular iron core and used for limiting the triangular iron core; a supporting plate is arranged at the bottom of the lower clamping piece, a top cover is arranged at the top of the upper clamping piece, a press-fit pull rod is arranged between the supporting plate and the top cover, and the press-fit pull rod is arranged at the center of the triangular iron core; be provided with down the triangle layer board on the layer board, the triangle layer board sets up in the center of triangle iron core down, and the pressfitting pull rod runs through triangle layer board center down, is provided with the triangle layer board on the pressfitting pull rod, goes up the triangle layer board and lies in the upper and lower both ends of coil respectively with triangle layer board down, and the up end of going up the triangle layer board is provided with insulating cushion with the lower terminal surface of triangle layer board down. According to the utility model, the top cover and the supporting plate are pressed through the pressing pull rod to realize the fixation of the triangular iron core and the coil, so that the fixation effect is improved.

Description

Triangular iron core dry-type transformer

Technical Field

The utility model relates to the technical field of transformer manufacturing, in particular to a triangular iron core dry-type transformer.

Background

At the present stage, the transformer mainly takes a planar laminated iron core transformer as a main part, along with the implementation of the national policy of energy conservation and emission reduction, the requirement of the market on the transformer is higher and higher, and meanwhile, the cost control is stricter. In the prior art, the traditional plug-in sheet type dry transformer iron core is heavy, long in working hours, large in length and size, high in cost and large in occupied area ratio, and a plurality of problems are often caused by the adoption of the traditional plug-in sheet type transformer in the field of rail transit.

The triangular iron core transformer is an energy-saving power transformer, and a laminated magnetic circuit structure and a three-phase layout of the traditional power transformer are creatively reformed, so that the performance of a product is more optimized, but the performance of the transformer is easily influenced by the fact that the existing transformer is unstable in fixing the triangular iron core and a coil.

Disclosure of Invention

The utility model provides a triangular iron core dry-type transformer, which solves the problem that the triangular iron core and a coil are not fixed stably in the prior art.

The technical scheme adopted by the utility model is as follows: a triangular iron core dry-type transformer comprises a triangular iron core, an upper clamping piece, a lower clamping piece and a coil, wherein the coil is wound on an iron core column of the triangular iron core;

the upper clamping piece and the lower clamping piece are respectively fixed at the top and the bottom of the triangular iron core and used for limiting the triangular iron core;

a supporting plate is arranged at the bottom of the lower clamping piece, a top cover is arranged at the top of the upper clamping piece, a press-fit pull rod is arranged between the supporting plate and the top cover, the press-fit pull rod is arranged at the center of the triangular iron core, and two ends of the press-fit pull rod are respectively connected with the top cover and the supporting plate;

the coil fixing device is characterized in that a lower triangular supporting plate is arranged on the supporting plate, the lower triangular supporting plate is arranged at the center of the triangular iron core, the press-fit pull rod penetrates through the center of the lower triangular supporting plate, an upper triangular supporting plate is arranged on the press-fit pull rod, the upper triangular supporting plate and the lower triangular supporting plate are respectively located at the upper end and the lower end of the coil, insulating cushion blocks are arranged on the opposite surfaces of the upper triangular supporting plate and the lower triangular supporting plate, and the insulating cushion blocks are used for fixing the coil.

Further, the triangle iron core includes three single frame iron core that the structure is the same, and is three the center line of single frame iron core is regular triangle, every single frame iron core includes two bilateral symmetry's iron core post and the yoke of longitudinal symmetry, every single frame iron core all with two in addition single frame iron core passes through the iron core post is connected, the coil winding is on two liang of iron core posts that splice.

Furthermore, the single-frame iron core is formed by rolling a silicon steel strip cut by a curve.

Furthermore, the coil comprises a low-voltage coil and a high-voltage coil, and the high-voltage coil is wound on the outer side of the low-voltage coil.

Furthermore, the high-voltage coil is formed by pouring epoxy resin.

Furthermore, the high-voltage transformer also comprises three high-voltage insulation terminals, wherein the high-voltage insulation terminals are connected with the high-voltage coil through high-voltage copper bars, and the heights of the three high-voltage insulation terminals are the same.

Furthermore, the lower triangular supporting plate and the upper triangular supporting plate are provided with through holes, the top cover and the supporting plate are provided with ventilation openings, and the through holes and the ventilation openings are used for ventilation and heat dissipation.

Further, a fan is arranged on the outer side of the lower clamping piece and used for dissipating heat of the whole transformer.

Further, the fan is fixed through a fixed seat, and the fixed seat is connected with the supporting plate.

Furthermore, a compression screw is arranged between the upper clamping piece and the lower clamping piece, and the compression screw is used for fixing the upper clamping piece, the lower clamping piece and the triangular iron core.

Furthermore, the upper clamping piece and the lower clamping piece are formed by bending and welding steel plates.

The utility model has the beneficial effects that: compared with the traditional transformer, the utility model has the advantages of more electricity and energy saving, less noise, less interference and low cost by adopting the triangular iron core. Meanwhile, the triangular iron core and the coil can be effectively positioned by adopting the clamp and the cushion block structure, the top cover and the supporting plate are pressed by the pressing pull rod to fix the triangular iron core and the coil, and the fixing effect is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the core structure of the present invention.

Fig. 3 is a schematic view of the frame structure of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present embodiment, a delta iron core dry-type transformer is provided, and fig. 1 is a structural diagram provided according to an embodiment of the present invention, and as shown in fig. 1, the transformer includes a delta iron core 1, an upper clamping piece 2, a lower clamping piece 3, and a coil is wound on a core leg 12 of the delta iron core 1.

The triangular iron core structure is as shown in fig. 2, the triangular iron core 1 comprises three single-frame iron cores 11 with the same structure, and is three, the center connecting line of the single-frame iron cores 11 is a regular triangle, every single-frame iron core 11 comprises two iron core columns 12 which are in bilateral symmetry and two iron yokes 13 which are in up-down symmetry, and the iron core columns and the iron yokes 13 jointly enclose a rectangular window, every single-frame iron core 11 is connected with the other two single-frame iron cores 11 through the iron core columns 12, the iron core columns 12 of the three single-frame iron cores 11 are spliced two by two to form the triangular iron core 1, and the coil is wound on the iron core columns 12. Namely, each iron core column 12 connected in pairs is wound with three coils.

The upper clamping piece 2 and the lower clamping piece 3 are respectively fixed at the top and the bottom of the triangular iron core 1 and used for limiting the triangular iron core 1. As shown in fig. 3, a supporting plate 5 is arranged at the bottom of the lower clamping piece 3, a top cover 4 is arranged at the top of the upper clamping piece 2, a pressing pull rod 6 is arranged between the supporting plate 5 and the top cover 4, the pressing pull rod 6 is arranged at the center of the triangular iron core 1, and two ends of the pressing pull rod 6 are respectively connected with the top cover 4 and the supporting plate 5, so as to tightly press the top cover 4 and the supporting plate 5. The utility model discloses a coil, including three corner core posts, supporting plate 5, triangle layer board 51, stitch pull rod 6, last triangle layer board 52 and lower triangle layer board 51, the stitch pull rod 6 runs through triangle layer board 51 center down, be provided with triangle layer board 52 on the stitch pull rod 6, last triangle layer board 52 and lower triangle layer board 51 are located the upper and lower both ends of coil respectively, it all is provided with insulating cushion 7 with lower triangle layer board 51 surface in opposite directions to go up triangle layer board 52, goes up folder 2 and is provided with insulating cushion 7 with lower folder 3 surface in opposite directions equally, and insulating cushion 7 sets up around iron core post 12, and insulating cushion 7 is used for fixed coil.

Compared with the traditional transformer, the utility model has the advantages of more electricity and energy saving, less noise, less interference and low cost by adopting the triangular iron core 1. Meanwhile, the triangular iron core 1 and the coil can be effectively positioned by adopting a clamping piece and cushion block structure, the top cover 4 and the supporting plate 5 are pressed by the pressing pull rod 6 to fix the triangular iron core 1 and the coil, and the fixing effect is improved.

In an embodiment of the present invention, compared to a conventional wound iron core, the single-frame iron core 11 is wound by a silicon steel strip cut from a curve. The iron core is formed by winding continuous silicon steel strips, so that the iron core is not cut and has no seam and gap, the magnetic flux leakage is fundamentally eliminated, the magnetic resistance is reduced, and the iron loss and the noise are reduced.

In one embodiment of the present invention, the coil includes a low voltage coil 81 and a high voltage coil 82, and the high voltage coil 82 is wound outside the low voltage coil 81. And epoxy resin is covered between the high-voltage coil 82 and the low-voltage coil 81. And the high insulation performance of the epoxy resin is utilized to insulate the high-voltage coil and the low-voltage coil. The high voltage coil 82 is cast from epoxy.

In one embodiment of the present invention, the transformer further comprises three high voltage insulated terminals 83, and the three high voltage insulated terminals 83 are respectively connected to the three high voltage coils 82 through high voltage copper bars 84. The three high-voltage insulation terminals 83 are sequentially connected with the connection terminal of the phase a high-voltage coil, the connection terminal of the phase B high-voltage coil, and the connection terminal of the phase C high-voltage coil 8 from left to right, and the connection terminals on each phase. The three high-voltage insulation terminals 83 have the same height and are located on the same side of the triangular iron core 1, so that the three high-voltage insulation terminals are economical and attractive. The three high-voltage insulation terminals 83 are located on the same side, and the same height is used for facilitating installation of workers, so that efficiency is improved.

In an embodiment of the present invention, in order to achieve higher heat dissipation performance, through holes 42 are formed in the lower triangular support plate 51 and the upper triangular support plate 52, ventilation openings 41 are formed in the top cover 4 and the support plate 5, and the through holes 42 and the ventilation openings 41 are used for ventilation and heat dissipation. The heat accumulation in the cavity that encloses when triangle core 1 during operation is seted up perforating hole 42 on upper triangle layer board 52 and lower triangle layer board 51 in the cavity that the inside encloses, top cap 4 with be provided with vent 41 on the layer board 5, can reduce the windage coefficient, help promoting the circulation of air speed, accelerate inside and outside air convection, accelerate the heat dissipation. In order to improve the heat dissipation effect, a fan 91 is arranged outside the lower clamping piece 3 and used for dissipating heat of the whole transformer. The fan 91 can be fixed through a fixing seat 92, the fixing seat 92 is connected with the supporting plate 5, and the fixing seat 92 can be made of angle steel. The number of the fans 91 can be 3, and the fans are respectively positioned at the bottom of three surfaces of the transformer.

In an embodiment of the present invention, in order to further fix the upper and lower clamping pieces 3, a compression screw 61 is disposed between the upper and lower clamping pieces 2 and 3, the compression screw 61 is used to fix the upper and lower clamping pieces 2 and 3 to the triangular iron core 1, and 3 compression screws 61 may be disposed, each being located on a face of the transformer 3. The upper clamping piece 2 and the lower clamping piece 3 are formed by bending and welding steel plates, and can be in the shape of an irregular hexagon.

Compared with the traditional inserting piece type dry-type transformer, the utility model has the following advantages: 1, reducing the no-load loss of electricity saving and energy saving by 40-50%. 2. The no-load current is reduced by 50-60%. 3. And (4) ultra-silence is realized, and the noise is reduced by 5-10 decibels. 4. No interference, and reduced magnetic leakage by more than 50%. 5. The raw materials are saved, and the cost of the copper and the iron is reduced by 15-20%. The transformer provided by the utility model has the advantages that the mechanical and electrical properties of the product are not influenced by improving the iron core structure, compared with the traditional inserted iron core structure, the cost is low, the working hours are short, the size is small, and the transformer provided by the utility model is more suitable for being adopted in the urban rail transit field at present when the energy conservation and emission reduction are increasingly emphasized, so that the energy consumption is reduced.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A triangular iron core dry-type transformer is characterized by comprising a triangular iron core (1), an upper clamping piece (2) and a lower clamping piece (3);

a coil is wound on the iron core column (12) of the triangular iron core (1);

the upper clamping piece (2) and the lower clamping piece (3) are respectively fixed at the top and the bottom of the triangular iron core (1) and used for limiting the triangular iron core (1);

a supporting plate (5) is arranged at the bottom of the lower clamping piece (3), a top cover (4) is arranged at the top of the upper clamping piece (2), a pressing pull rod (6) is arranged between the supporting plate (5) and the top cover (4), the pressing pull rod (6) is arranged at the center of the triangular iron core (1), and two ends of the pressing pull rod (6) are respectively connected with the top cover (4) and the supporting plate (5);

be provided with down triangle layer board (51) on layer board (5), lower triangle layer board (51) set up in the center of triangle core (1), the one end of pressfitting pull rod (6) runs through down triangle layer board (51) center, be provided with on the other end of pressfitting pull rod (6) triangle layer board (52), it is located the upper and lower both ends of coil respectively with lower triangle layer board (51) to go up triangle layer board (52), it all is provided with insulating cushion (7) with the surface in opposite directions of lower triangle layer board (51) to go up triangle layer board (52), folder (3) all are provided with insulating cushion (7) with the surface in opposite directions of last folder (2) down, insulating cushion (7) are used for fixed coil.

2. The triangular iron core dry-type transformer according to claim 1, wherein the triangular iron core (1) comprises three single-frame iron cores (11) with the same structure, the central connecting line of the three single-frame iron cores (11) is in a regular triangle shape, each single-frame iron core (11) comprises two iron core columns (12) which are symmetrical left and right and two iron yokes (13) which are symmetrical up and down, the two iron core columns and the two iron yokes (13) jointly enclose a rectangular window, each single-frame iron core (11) is connected with the other two single-frame iron cores (11) through the iron core columns (12), and the coil is wound on the iron core columns (12).

3. The delta iron core dry transformer according to claim 2, wherein said single frame iron core (11) is wound by a silicon steel strip.

4. The delta iron core dry transformer according to claim 1, wherein the coil comprises a low voltage coil (81) and a high voltage coil (82), and the high voltage coil (82) is wound outside the low voltage coil (81).

5. The delta core dry transformer according to claim 4, characterized in that the high voltage coil (82) is epoxy cast.

6. The delta core dry-type transformer according to claim 4, further comprising three high voltage insulated terminals (83), wherein three of said high voltage insulated terminals (83) are connected to three of said high voltage coils (82) by high voltage copper bars (84), respectively, and wherein the three high voltage insulated terminals (83) have the same height.

7. The delta iron core dry-type transformer according to claim 1, wherein the lower delta support plate (51) and the upper delta support plate (52) are both provided with through holes (42), the top cover (4) and the support plate (5) are both provided with ventilation openings (41), and the through holes (42) and the ventilation openings (41) are used for ventilation and heat dissipation.

8. The delta iron core dry transformer according to claim 7, wherein a fan (91) is provided outside the lower clip member (3) for dissipating heat of the entire transformer.

9. The delta iron core dry transformer according to claim 8, wherein the fan (91) is fixed by a fixing base (92), and the fixing base (92) is connected with the pallet (5).

10. The delta iron core dry transformer according to claim 1, wherein a compression screw (61) is provided between the upper clip member (2) and the lower clip member (3), and the compression screw (61) is used for fixing the upper clip member (2), the lower clip member (3) and the delta iron core (1).