CN210349542U

CN210349542U - Insulating heat radiation structure of oil-immersed type metallic glass transformer coil tip

Info

Publication number: CN210349542U
Application number: CN201921460133.1U
Authority: CN
Inventors: 方贝; 刘亚飞; 张庆杰
Original assignee: Henan Longxiang Electric Co ltd
Current assignee: Henan Longxiang Electric Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-04-17
Anticipated expiration: 2029-09-04

Abstract

The utility model provides an oil-immersed amorphous alloy transformer coil end insulation heat radiation structure, include low voltage coil and around establishing the high voltage coil in the low voltage coil outside, high voltage coil is enclosed to establish by two iron core assembly lateral walls that set up relatively and two connection lateral walls that set up relatively and forms, every an insulation piece has all been laid on the both ends face of iron core assembly lateral wall, the insulation piece with press from both sides between the iron core assembly lateral wall terminal surface and be equipped with a plurality of insulation cushion blocks, it is a plurality of form heat dissipation channel between the insulation cushion block. The coil end insulating and heat-dissipating structure of the oil-immersed amorphous alloy transformer has the advantages of scientific design, compact structure, good heat-dissipating performance and low material cost.

Description

Insulating heat radiation structure of oil-immersed type metallic glass transformer coil tip

Technical Field

The utility model relates to an oil-immersed amorphous alloy transformer, specific theory has related to an insulating heat radiation structure of oil-immersed amorphous alloy transformer coil ends.

Background

The oil immersed amorphous alloy transformer has the advantages of small exciting current, low no-load loss, obvious energy-saving effect and the like, is widely applied to the reconstruction of rural power grids and urban power grids, and has an increasingly large proportion in a distribution network along with the popularization of national power grid companies in recent years.

In the production of the existing oil-immersed amorphous alloy transformer, the amorphous alloy iron core is fragile and is easy to generate fragments after being stressed, so that the traditional amorphous alloy iron core is naturally sleeved on the coil and supported by the coil. In order to ensure the electrical strength and heat dissipation between the coil and the amorphous alloy iron core, the distance between the window of the amorphous alloy iron core and the coil is short, and a certain height is required to be reserved, so that the whole volume of the coil and the iron core is large, and the material cost is increased undoubtedly due to the fact that the cost of the amorphous alloy material is high.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The utility model aims at the not enough of prior art to a design science, compact structure, heat dispersion are good, material cost is low oil-immersed formula metallic glass transformer coil end insulation heat radiation structure is provided.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is: the utility model provides an oily formula metallic glass transformer coil tip insulation heat radiation structure, includes low voltage coil and establishes around the high voltage coil in the low voltage coil outside, high voltage coil is enclosed to establish by two iron core assembly lateral walls that set up relatively and two connection lateral walls that set up relatively and forms, every an insulation piece has all been laid on the both ends face of iron core assembly lateral wall, the insulation piece with it is equipped with a plurality of insulation cushion blocks, a plurality of to press from both sides between the iron core assembly lateral wall terminal surface form heat dissipation channel between the insulation cushion block.

Based on the above, two iron core assembly lateral wall with it is equipped with insulating film to press from both sides between the low voltage coil lateral surface, the both ends of insulating film stretch out the both ends face setting of iron core assembly lateral wall, form after outwards buckling at the both ends of insulating film the insulating piece.

Based on the above, a plurality of the insulating blocks are bonded to the outer side of the insulating sheet at equal intervals.

Based on the above, the insulating film is insulating crepe paper.

Based on the above, the insulating spacer block is an electrical laminated wood block.

Based on the above, the distance between the plurality of insulating cushion blocks is 20-25mm, and the height from the bottom ends of the insulating cushion blocks to the end face of the iron core assembling side wall is 5-10mm when the two ends of the insulating film are in the vertical state.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory, because in the coil structure of metallic glass transformer, high-voltage coil end voltage is higher, the utility model discloses two at traditional high-voltage coil add on the iron core assembly lateral wall terminal surface the insulating piece is with a plurality of insulating pad, it is a plurality of form heat dissipation channel between the insulating pad, through sheltering from the back like this, strengthened greatly the insulating properties of high-voltage coil end has effectively guaranteed the radiating effect simultaneously, like this in assembly process, can reduce metallic glass iron core window with the distance of iron core assembly lateral wall terminal surface, when guaranteeing electrical properties, reduced the size of metallic glass iron core, it has design science, compact structure, heat dispersion is good, material cost is low advantage.

Furthermore, the arrangement of the insulating film can facilitate the manufacturing of the coil, when the coil is manufactured, the low-voltage coil is wound firstly, the insulating film is fixed on two sides of the low-voltage coil respectively, and finally, the high-voltage coil is wound on the outermost side.

Drawings

Fig. 1 is a perspective view of the coil end insulating and heat dissipating structure of the oil-immersed amorphous alloy transformer of the present invention.

Fig. 2 is a side view of the coil end insulating and heat dissipating structure of the oil-immersed amorphous alloy transformer of the present invention.

In the figure: 1. a low-voltage coil; 2. a high-voltage coil; 3. insulating crepe paper; 4. insulating cushion blocks; 21. assembling the side wall of the iron core; 22. connecting the side walls; 23. the iron core is fitted to the end face of the side wall.

Detailed Description

The technical solution of the present invention will be described in further detail through the following embodiments.

As shown in fig. 1 and fig. 2, an insulating and heat-dissipating structure for an end of a coil of an oil-immersed amorphous alloy transformer includes a low-voltage coil 1 and a high-voltage coil 2 wound outside the low-voltage coil 1, where the high-voltage coil 2 is surrounded by two iron core assembling sidewalls 21 disposed opposite to each other and two connecting sidewalls 22 disposed opposite to each other; the core-assembling side wall 21 is the position where the amorphous alloy core is wound, and the above-mentioned equipment is common equipment for those skilled in the art, and does not need creative labor.

In order to reduce the size of the amorphous alloy iron core, two insulating crepe paper 3 is clamped between the iron core assembly side wall 21 and the outer side surface of the low-voltage coil 1, two ends of the insulating crepe paper 3 extend out of two end surfaces of the iron core assembly side wall 21, a plurality of insulating cushion blocks 4 are bonded on the outer sides of two ends of the insulating crepe paper 3, two ends of the insulating crepe paper 3 can be covered on the end surface of the iron core assembly side wall 21 after being bent outwards, and heat dissipation channels are formed among the insulating cushion blocks 4.

The working principle is as follows:

insulating crepe paper 3's both ends form the insulating piece after buckling down, cover on the terminal surface of iron core assembly lateral wall 21, because the voltage of 2 tip of high voltage coil is higher, through sheltering from the back like this, have strengthened greatly the insulating properties of 2 tip of high voltage coil, simultaneously radiating channel has effectively guaranteed the radiating effect, in the assembling process, can reduce amorphous alloy iron core window with the distance of iron core assembly lateral wall 21 terminal surface has reduced the size of amorphous alloy iron core when guaranteeing electrical property.

When the device is produced, firstly, cutting the insulating crepe paper into a required size, and bonding the insulating cushion blocks 4 at the two ends of the insulating crepe paper; then, winding the low-voltage coil 1, fixing the insulating crepe paper 3 on two sides of the low-voltage coil 1, and extending two ends of the insulating crepe paper 3 out of the end face of the iron core assembling side wall 21; then, the coil is placed on a high-voltage winding machine, and a high-voltage coil 2 is wound on the outermost side; and finally, bending the insulating crepe paper 3, covering the end face of the iron core assembly side wall 21, and mounting the amorphous alloy iron core.

In this embodiment, the insulating pad 4 is specifically an electrical laminated wood block, the insulating pads 4 are arranged at equal intervals, the intervals between the insulating pads 4 are 20-25mm, and the height from the bottom end of the insulating pad 4 to the end face of the iron core assembling side wall 21 is 5-10mm when the two ends of the insulating crepe paper 3 are in an upright state, so as to facilitate smooth bending and ensure a heat dissipation effect.

In other embodiments, the insulating crepe paper 3 can also be made of other insulating soft materials, and can also achieve similar functions.

In other embodiments, an insulating material may be laid on both end surfaces of the core assembly side wall 21 to form an insulating sheet, and the plurality of insulating blocks 4 are sandwiched between the insulating sheet and the end surfaces of the core assembly side wall 21, but are not connected to the insulating crepe paper 3, so that the overall volume and the material cost can be reduced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides an oily formula metallic glass transformer coil end portion insulation heat radiation structure, includes low tension coil and winds and establishes the high tension coil in the low tension coil outside, high tension coil is enclosed to establish by two iron core assembly lateral walls that set up relatively and two connection lateral walls that set up relatively and forms its characterized in that: every all laid an insulation piece on the both ends face of iron core assembly lateral wall, the insulation piece with press from both sides between the iron core assembly lateral wall terminal surface and be equipped with a plurality of insulating cushion, it is a plurality of form heat dissipation channel between the insulating cushion.

2. The oil-immersed amorphous alloy transformer coil end insulating and heat dissipating structure according to claim 1, characterized in that: two iron core assembly lateral wall with it is equipped with insulating film to press from both sides between the low voltage coil lateral surface, the both ends of insulating film are stretched out the both ends face setting of iron core assembly lateral wall, form after outwards buckling at the both ends of insulating film the insulating piece.

3. The oil-immersed amorphous alloy transformer coil end insulating and heat dissipating structure according to claim 2, characterized in that: and the insulating cushion blocks are bonded on the outer side of the insulating sheet at equal intervals.

4. The oil-immersed amorphous alloy transformer coil end insulating and heat dissipating structure according to any one of claims 2 to 3, characterized in that: the insulating flexible sheet is insulating crepe paper.

5. The oil-immersed amorphous alloy transformer coil end insulating and heat dissipating structure according to claim 4, characterized in that: the insulating cushion block is an electrical laminated wood block.

6. The oil-immersed amorphous alloy transformer coil end insulating and heat dissipating structure according to claim 5, characterized in that: the distance between the insulating cushion blocks is 20-25mm, and the height from the bottom ends of the insulating cushion blocks to the end face of the iron core assembling side wall is 5-10mm under the condition that the two ends of the insulating film are in an upright state.