CN215868897U - Air flue structure of transformer low-voltage coil and transformer thereof - Google Patents
Air flue structure of transformer low-voltage coil and transformer thereof Download PDFInfo
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- CN215868897U CN215868897U CN202121265302.3U CN202121265302U CN215868897U CN 215868897 U CN215868897 U CN 215868897U CN 202121265302 U CN202121265302 U CN 202121265302U CN 215868897 U CN215868897 U CN 215868897U
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Abstract
The utility model discloses an air passage structure of a transformer low-voltage coil, which comprises an annular low-voltage coil and is characterized in that: the low-voltage coil is provided with a first part and a second part which are connected in the circumferential direction, the first part faces to the middle of the transformer, and the second part faces to the edge of the transformer; the first part is not provided with a first heat dissipation air passage extending vertically, and the second part is provided with a second heat dissipation air passage extending vertically; or the first part is provided with a first heat dissipation air passage extending vertically, the second part is provided with a second heat dissipation air passage extending vertically, and the sum of the widths of all the first heat dissipation air passages in the radial direction of the low-voltage coil is smaller than the sum of the widths of all the second heat dissipation air passages in the radial direction of the low-voltage coil. Has the advantage of saving the material of the iron core. The utility model also discloses a transformer with the air passage structure of the transformer low-voltage coil, which also has the advantage of saving the material of an iron core.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to an air passage structure of a low-voltage coil of a transformer and the transformer.
Background
A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction. The transformer generally comprises three iron cores and three coil assemblies, each coil assembly comprises a low-voltage coil, an insulating cylinder sleeved outside the low-voltage coil, a high-voltage coil sleeved outside the insulating cylinder and the like, the three coil assemblies are arranged in a delta shape, each iron core comprises an upper transverse portion, a first vertical portion, a lower transverse portion and a second vertical portion which are sequentially connected end to end, and the first vertical portion and the second vertical portion of the same iron core are respectively positioned in two adjacent low-voltage coils.
In order to facilitate heat dissipation, an air duct for dissipating heat is often provided on the low-voltage coil. For example, chinese utility model patent application No. CN202021206476.8 (publication No. CN212230218U) discloses "a dry transformer", which includes: the high-voltage coil is sleeved on the outer surface of the low-voltage coil; a main empty channel is arranged between the low-voltage coil and the high-voltage coil; an insulating cylinder is arranged in the main hollow channel; the straight line distance from one side surface of the insulating cylinder close to the low-voltage coil is smaller than the straight line distance from one side surface of the insulating cylinder close to the high-voltage coil. This dry-type transformer, when being close to the low-voltage coil setting with the insulating cylinder, has increased the distance between high-voltage coil and the insulating cylinder, main air duct belongs to high-voltage coil's space increase promptly, has strengthened high-voltage coil's radiating effect, can reduce the quantity of the air duct that sets up in high-voltage coil, has reduced welded frequency, and the welding point reduces, has saved man-hour.
The air duct structure of the above patent, however, has the following problems:
firstly, the low-voltage coil in the patent is provided with a whole circle of heat dissipation air passages which are circumferentially arranged, wherein the part of the heat dissipation air passages close to the middle position of the transformer can be shielded by the iron core, so that the heat dissipation effect on the transformer is small;
secondly, the low-voltage coil makes the lateral wall of this part of low-voltage coil thicker because set up the heat dissipation air flue near transformer middle part position, when three low-voltage coil is the article style of calligraphy range, can make the distance between the inside wall of two adjacent low-voltage coil relatively far away, leads to setting up the distance between two vertical portions of the iron core between two adjacent low-voltage coil far away, namely can lead to the whole size of iron core great and make the iron core material more, is unfavorable for material saving.
SUMMERY OF THE UTILITY MODEL
The first technical problem to be solved by the present invention is to provide an air channel structure of a transformer low-voltage coil, which is convenient for saving the material of an iron core, according to the current state of the prior art.
The second technical problem to be solved by the present invention is to provide a transformer with an air channel structure for a low-voltage coil of the transformer, which can also save the material of an iron core.
The technical scheme adopted by the utility model for solving the first technical problem is as follows: the utility model provides an air flue structure of transformer low voltage coil, includes annular low voltage coil, its characterized in that: the low-voltage coil is provided with a first part and a second part which are connected in the circumferential direction, the first part faces to the middle of the transformer, and the second part faces to the edge of the transformer;
the first part is not provided with a first air passage extending vertically, and the second part is provided with a second air passage extending vertically;
or the first part is provided with a first air passage extending vertically, the second part is provided with a second air passage extending vertically, and the sum of the widths of all the first air passages in the radial direction of the low-pressure coil is smaller than the sum of the widths of all the second air passages in the radial direction of the low-pressure coil.
In order to facilitate heat dissipation, the second part is provided with at least two second air passages, and all the second air passages are arranged at intervals along the radial direction of the low-voltage coil. Through setting up two at least second air flues, heat dissipation channel is more like this, and the heat dissipation of being convenient for.
The low-voltage coil can adopt different shapes, in order to save iron core materials, the cross section of the low-voltage coil is in a ring-shaped pentagon shape, the low-voltage coil comprises a first side wall, a second side wall, a third side wall, a fourth side wall and a fifth side wall which are sequentially connected end to end, the two connected side walls form an angle with each other, and each side wall respectively corresponds to each side of the pentagon shape;
the first portion includes a first sidewall and a second sidewall, and the second portion includes a third sidewall, a fourth sidewall, and a fifth sidewall.
The cross section of the low-voltage coil is in the shape of a circular pentagon, so that when the three low-voltage coils are arranged in a triangular shape, the distance between the inner walls of the two adjacent low-voltage coils can be close to each other, the size of an iron core arranged between the two adjacent low-voltage coils is small, the iron core material can be saved, and the cost is reduced.
The technical scheme adopted by the utility model for solving the second technical problem is as follows: a transformer that has applied the air flue structure as above-mentioned transformer low-voltage coil, its characterized in that: the low-voltage coil has three, and three low-voltage coil is the triangle and arranges, and the first part of each low-voltage coil all faces the middle part of transformer, and the second part of each low-voltage coil all faces the edge of transformer.
The transformer comprises three annular iron cores, each iron core comprises an upper transverse portion, a first vertical portion, a lower transverse portion and a second vertical portion which are sequentially connected end to end, and the first vertical portion and the second vertical portion of the same iron core are respectively located in two adjacent low-voltage coils.
For insulation, an insulating cylinder is sleeved outside each low-voltage coil, a plurality of supporting strips are arranged between the insulating cylinder and the outer wall of the low-voltage coil, and all the supporting strips are arranged at intervals along the circumferential direction of the outer wall of the low-voltage coil.
The structure of the insulating cylinder is specifically as follows: and a plurality of circles of insulating tapes are wound on the periphery of the stay and distributed up and down along the stay, and the insulating tapes form the insulating cylinder.
In order to compress the insulating cylinder, cushion blocks used for compressing the insulating cylinder are arranged on the upper portion and the lower portion of the insulating cylinder, an upper pressing plate and a lower pressing plate are arranged on the upper cushion block and the lower cushion block respectively, and the upper pressing plate and the lower pressing plate are vertically tensioned through a screw.
The connection structure of the screw is specifically as follows: the upper pressing plate is connected with the screw rod through an upper nut, and the lower pressing plate is connected with the bottom of the screw rod through a lower nut. Therefore, the screw rod connection is relatively tight, so that the cushion block can firmly press the insulating cylinder.
And finally, a high-voltage coil is sleeved outside each low-voltage coil.
Compared with the prior art, the utility model has the advantages that: the first part of the low-voltage coil is not provided with the first heat dissipation air passage which extends vertically, the second part is provided with the second heat dissipation air passage which extends vertically, or the first part of the low-voltage coil is provided with the first heat dissipation air passage which extends vertically, the second part is provided with the second heat dissipation air passage which extends vertically, the sum of the widths of all the first heat dissipation air passages along the radial direction of the low-voltage coil is less than the sum of the widths of all the second heat dissipation air passages along the radial direction of the low-voltage coil, so that the side wall of the first part of the low-voltage coil is thinner, when three low-voltage coils are arranged in a shape like a Chinese character 'pin', the distance between the inner side walls of two adjacent low-voltage coils is relatively shorter, the distance between the first vertical part and the second vertical part of the iron core which are arranged between the two adjacent low-voltage coils is shorter, the whole size of the iron core is smaller, the material consumption of the iron core is less, and the material consumption of the iron core is beneficial to the saving of the iron core, the cost is reduced.
The transformer with the air passage structure of the transformer low-voltage coil also has the advantages of saving iron core materials and reducing cost.
Drawings
Fig. 1 is a schematic perspective view of a transformer according to an embodiment of the present invention;
FIG. 2 is a perspective view of FIG. 1 with the core removed;
FIG. 3 is a longitudinal cross-sectional view of FIG. 1;
FIG. 4 is a longitudinal cross-sectional view of FIG. 2;
FIG. 5 is an assembly view of an upper platen, a spacer, a lower platen, a screw, an insulating sleeve, etc.;
FIG. 6 is a schematic view from another angle of FIG. 5;
FIG. 7 is an exploded view of FIG. 1;
FIG. 8 is a schematic diagram of the position relationship of three coil assemblies according to an embodiment of the present invention;
FIG. 9 is an exploded view of a coil assembly in accordance with an embodiment of the present invention;
fig. 10 is a longitudinal cross-sectional view at another angle of fig. 1.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 10, a preferred embodiment of a transformer using an air passage structure having a low voltage coil of the transformer is shown.
The transformer comprises an air passage structure of a low-voltage coil of the transformer, three annular iron cores 7, an insulating cylinder 33, a high-voltage coil 32, a stay 34, a cushion block 2, an upper pressing plate 1, a lower pressing plate 6, a screw rod 4, an upper nut 5, a lower nut 9 and the like. Referring to fig. 8 and 9, the low voltage coil 31, the high voltage coil 32, the insulating cylinder 33, and the stay 34 form a coil assembly 3.
The air passage structure of the transformer low-voltage coil comprises three annular low-voltage coils 31, and the three low-voltage coils 31 are arranged in a delta shape. Each low voltage coil 31 has a first portion 316 and a second portion 317 connected circumferentially, the first portion 316 of each low voltage coil 31 facing the middle of the transformer and the second portion 317 of each low voltage coil 31 facing the edges of the transformer. The first portion 316 is not provided with a first heat dissipation air duct extending vertically, the second portion 317 is provided with a second heat dissipation air duct 317a extending vertically, the second portion 317 is provided with two second heat dissipation air ducts 317a, and all the second heat dissipation air ducts 317a are arranged at intervals along the radial direction of the low voltage coil 31. The number of the second heat dissipation air ducts 317a can also be adjusted as required, and the size control of the air ducts of the second heat dissipation air ducts 317a can be realized by arranging stays with certain sizes in the second heat dissipation air ducts 317 a. In order to save materials of the iron core 7, in this embodiment, the cross section of the low-voltage coil 31 is a circular pentagon, each low-voltage coil 31 includes a first side wall 311, a second side wall 312, a third side wall 313, a fourth side wall 314 and a fifth side wall 315 which are sequentially connected end to end, an angle is formed between the two connected side walls, and each side wall corresponds to each side of the pentagon; the first portion 316 includes a first sidewall 311 and a second sidewall 312, and the second portion 317 includes a third sidewall 313, a fourth sidewall 314, and a fifth sidewall 315. In other embodiments, low voltage coil 31 may take other shapes as desired.
The three annular iron cores 7 are arranged in a delta shape. Each iron core 7 comprises an upper transverse portion 71, a first vertical portion 72, a lower transverse portion 73 and a second vertical portion 74 which are sequentially connected end to end, and the first vertical portion 72 and the second vertical portion 74 of the same iron core 7 are respectively positioned in two adjacent low-voltage coils 31.
An insulating cylinder 33 is sleeved outside each low-voltage coil 31, a plurality of supporting strips 34 are arranged between the insulating cylinder 33 and the outer wall of the low-voltage coil 31, and all the supporting strips 34 are arranged at intervals along the circumferential direction of the outer wall of the low-voltage coil 31.
A plurality of circles of insulating tapes are wound on the periphery of the stay 34, and are distributed up and down along the stay 34 to form an insulating cylinder 33. The upper part and the lower part of the insulation cylinder 33 are respectively provided with a cushion block 2 for pressing the insulation cylinder 33, the upper cushion block 2 and the lower cushion block 2 are respectively provided with an upper pressing plate 1 and a lower pressing plate 6, and the upper pressing plate 1 and the lower pressing plate 6 are vertically tensioned through a screw rod 4. The upper pressing plate 1 is connected with the screw rod 4 through an upper nut 5, and the lower pressing plate 6 is connected with the bottom of the screw rod 4 through a lower nut 9. Each low voltage coil 31 is sheathed with a high voltage coil 32.
The use principle and the working process of the transformer are as follows.
By providing two second heat dissipation air ducts 317a in the second portion 317 of each low voltage coil 31, the heat dissipation effect is better because the second heat dissipation air ducts 317a of the second portion 317 are not blocked by the iron core 7.
In addition, the first portion 316 of each low-voltage coil 31 is not provided with a first heat dissipation air channel, so that the side wall of the first portion 316 of each low-voltage coil 31 is thinner, when three low-voltage coils 31 are arranged in a delta shape, the distance between the inner side walls of two adjacent low-voltage coils 31 is relatively shorter, so that the distance between the first vertical portion 72 and the second vertical portion 74 of the iron core 7 arranged between two adjacent low-voltage coils 31 is shorter, that is, the whole size of the iron core 7 is smaller, the material consumption of the iron core 7 is less, the material consumption of the iron core 7 is facilitated, and the cost is reduced.
Example two:
the structure is basically the same as that of embodiment 1, except that: in this embodiment, the first portion 316 of the low-voltage coil is provided with a first heat-dissipating air passage extending vertically, the second portion 317 is provided with a second heat-dissipating air passage 317a extending vertically, and the sum of the widths of all the first heat-dissipating air passages 316a in the radial direction of the low-voltage coil 31 is smaller than the sum of the widths of all the second heat-dissipating air passages 317a in the radial direction of the low-voltage coil 31.
The using principle and the working process are the same as those of the embodiment 1: in the same low-voltage coil 31, the sum of the widths of all the first heat dissipation air ducts 316a in the radial direction of the low-voltage coil 31 is smaller than the sum of the widths of all the second heat dissipation air ducts 317a in the radial direction of the low-voltage coil 31, and similarly, the side wall of the first portion 316 of each low-voltage coil 31 is also made thinner, when three low-voltage coils 31 are arranged in a delta shape, the distance between the inner side walls of two adjacent low-voltage coils 31 is made relatively closer, so that the distance between the first vertical portion 72 and the second vertical portion 74 of the iron core 7 arranged between two adjacent low-voltage coils 31 is made closer, that is, the overall size of the iron core 7 is made smaller, the material of the iron core 7 is made smaller, and the material saving of the iron core 7 is facilitated.
Claims (10)
1. An air channel structure of a low-voltage coil of a transformer comprises an annular low-voltage coil (31), and is characterized in that: the low-voltage coil (31) is provided with a first part (316) and a second part (317) which are connected in the circumferential direction, the first part (316) faces to the middle part of the transformer, and the second part (317) faces to the edge of the transformer;
the first part (316) is not provided with a first heat dissipation air channel extending vertically, and the second part (317) is provided with a second heat dissipation air channel (317a) extending vertically;
or the first part (316) is provided with a first heat dissipation air channel extending vertically, the second part (317) is provided with a second heat dissipation air channel (317a) extending vertically, and the sum of the widths of all the first heat dissipation air channels along the radial direction of the low-voltage coil (31) is smaller than the sum of the widths of all the second heat dissipation air channels (317a) along the radial direction of the low-voltage coil (31).
2. The air passage structure of the low-voltage coil of the transformer according to claim 1, wherein: the second part (317) is provided with at least two second heat dissipation air ducts (317a), and all the second heat dissipation air ducts (317a) are arranged at intervals along the radial direction of the low-voltage coil (31).
3. The air passage structure of the low-voltage coil of the transformer according to claim 1, wherein: the cross section of the low-voltage coil (31) is in a ring-shaped pentagon shape, the low-voltage coil (31) comprises a first side wall (311), a second side wall (312), a third side wall (313), a fourth side wall (314) and a fifth side wall (315) which are sequentially connected end to end, the two connected side walls form an angle with each other, and each side wall corresponds to each side of the pentagon;
the first portion (316) comprises a first sidewall (311) and a second sidewall (312), and the second portion (317) comprises a third sidewall (313), a fourth sidewall (314), and a fifth sidewall (315).
4. A transformer with an air channel structure of a low-voltage coil of the transformer applied according to any one of claims 1 to 3, characterized in that: the low-voltage coils (31) are three, the three low-voltage coils (31) are arranged in a delta shape, a first part (316) of each low-voltage coil (31) faces to the middle of the transformer, and a second part (317) of each low-voltage coil (31) faces to the edge of the transformer.
5. The transformer of claim 4, wherein: the transformer further comprises three annular iron cores (7), each iron core (7) comprises an upper transverse portion (71), a first vertical portion (72), a lower transverse portion (73) and a second vertical portion (74) which are sequentially connected end to end, and the first vertical portion (72) and the second vertical portion (74) of the same iron core (7) are respectively located in two adjacent low-voltage coils (31).
6. The transformer of claim 4, wherein: each low-voltage coil (31) is sleeved with an insulating cylinder (33), a plurality of supporting strips (34) are arranged between the insulating cylinder (33) and the outer wall of the low-voltage coil (31), and all the supporting strips (34) are arranged along the circumferential direction of the outer wall of the low-voltage coil (31) at intervals.
7. The transformer of claim 6, wherein: and a plurality of circles of insulating tapes are wound on the periphery of the stay (34) and distributed up and down along the stay (34), and the insulating tapes form the insulating cylinder (33).
8. The transformer of claim 6, wherein: the upper portion and the lower part of the insulating cylinder (33) are provided with cushion blocks (2) used for compressing the insulating cylinder (33), the upper cushion block (2) and the lower cushion block (2) are respectively provided with an upper pressing plate (1) and a lower pressing plate (6), and the upper pressing plate (1) and the lower pressing plate (6) are vertically tensioned through a screw (4).
9. The transformer of claim 8, wherein: the upper pressing plate (1) is connected with the screw rod (4) through an upper nut (5), and the lower pressing plate (6) is connected with the bottom of the screw rod (4) through a lower nut (9).
10. The transformer of claim 4, wherein: and a high-voltage coil (32) is sleeved outside each low-voltage coil (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121265302.3U CN215868897U (en) | 2021-06-07 | 2021-06-07 | Air flue structure of transformer low-voltage coil and transformer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121265302.3U CN215868897U (en) | 2021-06-07 | 2021-06-07 | Air flue structure of transformer low-voltage coil and transformer thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215868897U true CN215868897U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121265302.3U Active CN215868897U (en) | 2021-06-07 | 2021-06-07 | Air flue structure of transformer low-voltage coil and transformer thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215868897U (en) |
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2021
- 2021-06-07 CN CN202121265302.3U patent/CN215868897U/en active Active
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Address after: 315031 No.17 and 22 Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Aokes Intelligent Technology Co.,Ltd. Address before: 315031 No.17 and 22 Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. |