CN217468167U - Axial segmentation multi-winding dry-type transformer - Google Patents
Axial segmentation multi-winding dry-type transformer Download PDFInfo
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- CN217468167U CN217468167U CN202220397385.XU CN202220397385U CN217468167U CN 217468167 U CN217468167 U CN 217468167U CN 202220397385 U CN202220397385 U CN 202220397385U CN 217468167 U CN217468167 U CN 217468167U
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Abstract
The utility model provides an axial segmentation multiconductor dry-type transformer. The transformer comprises an iron core, a first coil and a second coil, wherein the first coil and the second coil are arranged on the upper portion and the lower portion of the iron core, a first cushion block is arranged at the top of the first coil, a second cushion block is arranged between the first coil and the second coil, a third cushion block is arranged at the bottom of the second coil, an insulating cylinder is arranged between the primary coil and the secondary coil, the primary coil and the secondary coil are separated through the insulating cylinder, the short-circuit resistance of the transformer can be effectively guaranteed, and the creepage distance can be effectively increased through the arranged first cushion block, the second cushion block and the third cushion block.
Description
Technical Field
The utility model relates to a transformer field specifically is an axial segmentation multiconductor dry-type transformer.
Background
With the increasing demand of high-voltage equipment on the performance of a high-voltage power supply, the dry type transformer needs to have short-circuit resistance and more secondary output voltage groups, however, the axial height of the coil is too high due to more secondary groups of the coil of the conventional dry type transformer, so that the manufacturing and assembling difficulty of the dry type transformer is high, and a lot of time is wasted.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an axial segmentation multiconductor dry-type transformer to solve the more coil axial height that leads to of current transformer coil secondary group number, and then lead to the transformer to make and assemble the degree of difficulty great, extravagant plenty of time problem.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
an axially segmented multi-winding dry-type transformer comprising: the coil winding device comprises a pad block assembly, an iron core, a first coil, a second coil and a plurality of insulating cylinders;
the cushion block assembly comprises: the first cushion block, the second cushion block and the third cushion block;
the first coil is sleeved on the upper part of the iron core, and the second coil is sleeved on the lower part of the iron core;
the first cushion block is arranged at the top of the first coil;
the second cushion block is arranged between the first coil and the second coil;
the third cushion block is arranged at the bottom of the second coil;
the first coil and the second coil are both formed by a primary coil and a secondary coil, wherein the primary coil is arranged between the secondary coil and the iron core;
insulating cylinders are arranged between the primary coil and the iron core and between the primary coil and the secondary coil.
Preferably, the second pad is an annular open pad.
Preferably, the first cushion block and the third cushion block are formed by combining a plurality of cushion blocks.
Preferably, the first pad and the third pad are provided with fixing grooves for fixing the insulation tube.
Preferably, a multilayer insulation cylinder is arranged between the secondary side coil and the primary side coil.
Preferably, the two ends of the insulation cylinder are provided with symmetrical convex parts.
Preferably, the secondary winding has a plurality of bosses at the lead-out ends.
Preferably, the plurality of bosses are divided into a plurality of rows, and the plurality of bosses are arranged along the vertical direction in a staggered manner.
Preferably, the first coil and the second coil are both cast with epoxy.
Preferably, the method further comprises the following steps: a wheel carrier;
the wheel carrier is used for placing a transformer consisting of the iron core, the first coil and the second coil.
The utility model provides an axial segmented multi-winding dry-type transformer, which is characterized in that a first coil and a second coil are arranged above and below an iron core, a first cushion block is arranged at the top of the first coil, a second cushion block is arranged between the first coil and the second coil, a third cushion block is arranged at the bottom of the second coil, and an insulating cylinder is arranged between the primary coil and the iron core and between the primary coil and the secondary coil, the primary coil and the secondary coil are separated by the insulating cylinder, so that the short-circuit resistance of the transformer can be effectively ensured, the creepage distance can be effectively increased through the first cushion block, the second cushion block and the third cushion block, therefore, compared with the transformer in the prior art, the transformer has the advantages that the short-circuit resistance of the transformer can be guaranteed, and the problems of difficult assembly and difficult manufacture caused by overhigh coil axial height when the number of secondary side groups of the transformer coil is large can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an axial segmented multi-winding dry-type transformer according to an embodiment of the present invention;
fig. 2 is a front view of an insulation cylinder provided in an embodiment of the present invention;
fig. 3 is a side view of an insulation cylinder according to an embodiment of the present invention;
fig. 4 is a top view of an insulation cylinder provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first cushion block and a third cushion block provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second cushion block according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a lead-out end of a secondary winding according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a lead wire connection according to an embodiment of the present invention;
fig. 9 is a schematic partial structure diagram of the embodiment of the present invention shown in fig. 8;
fig. 10 is another schematic partial structure diagram of the embodiment of the present invention shown in fig. 8.
Wherein, the iron core 1; a first cushion block 2; a first coil 3; a secondary side outgoing line 4; a second cushion block 5; a second coil 6; an insulating cylinder 7; a third head block 8; a wheel carrier 9; a primary side outgoing line 10; a support 11; a boss 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides an axial segmentation multiconductor dry-type transformer, refer to fig. 1 to 8, fig. 1 is axial segmentation multiconductor dry-type transformer's schematic diagram, and axial segmentation multiconductor dry-type transformer includes: the coil comprises a pad assembly, an iron core 1, a first coil 3, a second coil 6 and a plurality of insulating cylinders 7;
the cushion block assembly comprises: a first head block 2, a second head block 5 and a third head block 8;
the first coil 3 is sleeved on the upper part of the iron core 1, and the second coil 6 is sleeved on the lower part of the iron core 1;
the first cushion block 2 is arranged at the top of the first coil 3;
the second cushion block 5 is arranged between the first coil 3 and the second coil 6;
the third cushion block 8 is arranged at the bottom of the second coil 6;
the first coil 3 and the second coil 6 are both formed by a primary coil and a secondary coil, wherein the primary coil is arranged between the secondary coil and the iron core 1;
It should be noted that, a first coil 3 and a second coil 6 are disposed above and below an iron core 1, a first cushion block 2 is disposed on the top of the first coil 3, a second cushion block 5 is disposed between the first coil 3 and the second coil 6, a third cushion block 8 is disposed on the bottom of the second coil 6, and an insulating cylinder 7 is arranged between the primary coil and the iron core 1 and between the primary coil and the secondary coil, the primary coil and the secondary coil are separated by the insulating cylinder 7, the short-circuit resistance of the transformer can be effectively ensured, and the creepage distance can be effectively increased by the arrangement of the first cushion block 2, the second cushion block 5 and the third cushion block 8, therefore, compared with the transformer in the prior art, the transformer has the advantages that the short-circuit resistance of the transformer can be guaranteed, and the problems of difficulty in assembly and difficulty in manufacturing due to the fact that the axial height of the coil is too high when the number of secondary side groups of the transformer coil is large can be solved.
In particular, the second pad 5 is an annular open pad.
It should be noted that, the second cushion block 5 is set as an annular opening cushion block, which can facilitate installation by a worker. The opening angle of the annular opening cushion block and the thickness of the annular opening cushion block can be adjusted by a person skilled in the art according to the sizes of the first coil and the second coil, and the opening angle of the opening cushion block and the thickness of the annular opening cushion block are not limited here.
Further, the first head block 2 and the third head block 8 are formed by combining a plurality of head blocks.
It should be noted that, the first cushion block 2 and the third cushion block 8 are formed by combining a plurality of cushion blocks, so that the thickness of the first cushion block 2 and the thickness of the second cushion block 5 can be conveniently set by a worker according to requirements.
Specifically, the first spacer 2 and the third spacer 8 are provided with fixing grooves for fixing the insulating tube 7.
It should be noted that, by providing the fixing grooves for fixing the insulating cylinder 7 on the first cushion block 2 and the third cushion block 8, the first coil 3 and the second coil 6 can be firmly fixed, and the overall stability of the assembled first coil 3 and the assembled second coil 6 is further improved.
Further, a multilayer insulation cylinder 7 is arranged between the secondary side coil and the primary side coil.
It should be noted that, the multilayer insulation cylinder 7 is arranged between the secondary winding and the primary winding, so that the short-circuit resistance between the secondary winding and the primary winding can be further ensured. And in the utility model, 2 layers of insulating cylinders 7 are arranged between the secondary side coil and the primary side coil.
Specifically, the two ends of the insulating cylinder 7 are provided with symmetrical protruding parts.
The insulation performance of the leads of the first coil 3 and the second coil 6 with respect to the core 1 and the ground can be enhanced by providing the symmetrical protrusions at both ends of the insulating tube 7.
It is also noted that the spacer assembly has insulating properties.
Furthermore, a plurality of bosses are arranged at the leading-out positions of the secondary side coils.
The plurality of bosses are arranged at the lead outlet of the secondary coil, so that when a lead copper pipe of the primary coil is led to the lower part of the transformer to form triangular connection, the strength of the fixed lead can be improved, and the insulation distance of the lead of the transformer can be increased.
Specifically, a plurality of bosss divide into the multiseriate, and a plurality of bosss dislocation sets up along vertical direction.
It should be noted that, when the number of secondary windings is large, the structure can ensure the insulation distance between the outgoing lines of adjacent windings, and also can ensure that all the outgoing lines of the secondary windings are smoothly concentrated on one side of the transformer, thereby facilitating the use of users.
Further, the first coil 3 and the second coil 6 are both cast with epoxy resin.
By casting epoxy resin into the first coil 3 and the second coil 6, the overall strength of the first coil 3 and the second coil 6 can be increased, and the short-circuit resistance can be improved.
It should be noted that, when the epoxy resin is poured into the first coil 3 and the second coil 6, the epoxy resin may be poured in a vacuum state.
It is worth noting that when the secondary coil is wound, epoxy resin can be poured into the dovetail cushion block with the supporting strip, so that the winding difficulty of the secondary coil can be effectively reduced, and the overall strength of the winding is improved.
Preferably, the insulating cylinders 7 between the primary coil and the secondary coil of the first coil 3 and the second coil 6 and between the iron core 1 and the primary coil are integrated.
Further, the axial segmented multi-winding dry-type transformer further comprises: a wheel carrier 9;
the wheel carrier 9 is used for placing the transformer consisting of the iron core 1, the first coil 3 and the second coil 6.
It should be noted that, by arranging the wheel carrier 9, the transformer composed of the iron core 1, the first coil 3 and the second coil 6 can be conveniently moved, so that the installation by workers is facilitated.
To facilitate understanding of the above solution, the solution is further described below with reference to fig. 1 to 10.
A transformer meeting the direct current withstand voltage of 170kV/min and the power frequency withstand voltage of 120kV/min is characterized in that a coil of the transformer is axially segmented, a secondary winding is split, insulating cylinders are additionally arranged between a primary coil and an iron core and between the secondary winding and the primary coil, and a combined cushion block for increasing the creepage distance is adopted.
A specially-made one-layer insulating cylinder is adopted between the primary coil and the iron core, a specially-made two-layer insulating cylinder is adopted between the secondary coil and the primary coil, and the insulating cylinders are integrated in the height direction.
The insulation cylinder is heightened at the position of the lead head of the coil, and the insulation performance of the lead to the iron core and the ground is enhanced.
The combined cushion block has the function of fixing the insulating cylinder.
The transformer coil structure is divided into two sections axially, namely, each phase of the primary side and the secondary side of the transformer is divided into an upper coil and a lower coil. The middle of the upper coil (namely the first coil 3) and the lower coil (namely the second coil 6) is supported by an annular opening cushion block, so that the overall stability of the assembled upper coil and the assembled lower coil is enhanced. The primary coils of the upper coil and the lower coil are led out by winding copper wires and then are welded and connected, and are covered with insulation.
The opening angle of the opening cushion block and the thickness of the opening cushion block can be adjusted according to the size of the coil, and the coil is suitable for various conditions.
The dovetail cushion block with the supporting strips which can be poured in epoxy resin is adopted during winding of the winding, so that the winding difficulty is reduced, and the overall strength of the winding is improved.
The lead outlet of the secondary coil is made into a boss which is arranged in a staggered mode, and the lead copper tube of the primary coil is led to the lower portion of the transformer to form triangular connection, so that the strength of the fixed lead is improved, and the insulation distance of the lead of the transformer is increased.
The utility model provides a technical problem lie in: the insulating design problem of a high-voltage power supply system under the condition of alternating current and direct current high voltage resistance of the transformer is solved, the short-circuit resistance of the transformer when the secondary windings of the transformer are axially distributed is ensured, the manufacturing and assembling problems when the axial height of the coil is overhigh due to more secondary winding groups of the transformer are solved, and the connecting and arranging problems of external leads of the transformer are solved.
The utility model discloses a realize through following technical scheme:
1. the insulation design basis of the transformer is obtained through simulation tests under the two withstand voltage conditions of alternating current and direct current of the transformer. And the insulation distance between the primary coil and the secondary coil and the casting thickness of epoxy resin are increased, insulation cylinders are added between the primary coil and the iron core and between the secondary coil and the primary coil, and a combined cushion block for increasing the creepage distance is adopted.
2. By analyzing the distribution condition of the short-circuit impedance of the transformer when the secondary windings are axially distributed, different short-circuit resistance of each winding in a short-circuit state is effectively analyzed. The primary coil and the secondary coil are both molded by casting epoxy resin in a vacuum state, so that the integral strength of the coil is enhanced, and the short-circuit resistance is improved.
3. Because the number of the secondary side split windings is large and the secondary side split windings are 58 multilayer copper wire type windings, the height of the primary side coil and the secondary side coil of the transformer is high, and the manufacturing and the assembly are inconvenient. The dovetail cushion block with the supporting strips, which can be poured in epoxy resin, is adopted during winding of the secondary winding of the transformer, so that the winding difficulty is reduced, and the overall strength of the winding is improved. The transformer structurally adopts a structure that the transformer is divided into two sections in the axial direction, namely, the primary side and the secondary side of the transformer are divided into an upper coil and a lower coil, the middle of the upper coil and the lower coil are supported by adopting an annular opening cushion block, and the primary side coils of the upper coil and the lower coil are led out by adopting winding copper wires and then are welded and connected and are wrapped with insulation. Specially-made insulating cylinders are adopted between the primary coil and the iron core and between the secondary coil and the primary coil, and the insulating cylinders are integrated in the height direction, so that the insulating performance between the primary coil and the iron core and between the secondary coil and the primary coil is effectively enhanced.
4. Because the primary coil of the transformer is connected in a triangle way and has a phase shift angle of 7.5 degrees, the secondary coil is axially split into 58 windings, and the primary and secondary leads are more. The secondary side coil of the transformer has higher voltage withstanding level, is DC withstand voltage of 170kV/min, and simultaneously meets the power frequency withstand voltage of 120 kV/min. The primary side and the secondary side have more leads, the insulation and voltage resistance level of the transformer is higher, in order to arrange external leads reasonably, the outlet of the secondary side coil lead is made into a boss which is arranged in a staggered way, and a lead copper tube of the primary side coil is led to the lower part of the transformer to form triangular connection, so that the strength of the fixed leads is improved, and the insulation distance of the leads of the transformer is increased.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the dry-type transformer can meet the requirements of alternating current and direct current under two high-voltage-withstanding conditions, is suitable for market demands, and increases a profit growth point.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An axially segmented multi-winding dry-type transformer, comprising: the coil winding device comprises a pad block assembly, an iron core, a first coil, a second coil and a plurality of insulating cylinders;
the cushion block assembly includes: the first cushion block, the second cushion block and the third cushion block;
the first coil is sleeved on the upper part of the iron core, and the second coil is sleeved on the lower part of the iron core;
the first cushion block is arranged at the top of the first coil;
the second cushion block is arranged between the first coil and the second coil;
the third cushion block is arranged at the bottom of the second coil;
the first coil and the second coil are both formed by a primary coil and a secondary coil, wherein the primary coil is arranged between the secondary coil and the iron core;
the insulating cylinders are arranged between the primary coil and the iron core and between the primary coil and the secondary coil.
2. The axially segmented multi-winding dry-type transformer of claim 1, wherein the second spacer is an annular split spacer.
3. The axially segmented multi-winding dry-type transformer of claim 1, wherein the first and third spacers are combined from a plurality of spacers.
4. The axially segmented multi-winding dry-type transformer according to claim 1, wherein the first and third spacers are provided with fixing grooves for fixing the insulation tube.
5. The axially-segmented multi-winding dry-type transformer according to claim 1, wherein a multi-layer insulating cylinder is disposed between the secondary winding and the primary winding.
6. The axially segmented multi-winding dry-type transformer according to claim 1, wherein symmetrical protrusions are provided at both ends of the insulation tube.
7. The axially-segmented multi-winding dry-type transformer according to claim 1, wherein a plurality of bosses are provided at the lead-out ends of the secondary windings.
8. The axially segmented multi-winding dry-type transformer according to claim 7, wherein the plurality of bosses are divided into a plurality of columns, and the plurality of bosses are arranged in a vertical direction in a staggered manner.
9. The axially segmented multi-winding dry-type transformer according to claim 1, wherein the first coil and the second coil are each cast with epoxy.
10. The axially segmented multi-winding dry-type transformer of claim 1, further comprising: a wheel carrier;
the wheel carrier is used for placing a transformer consisting of the iron core, the first coil and the second coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220397385.XU CN217468167U (en) | 2022-02-25 | 2022-02-25 | Axial segmentation multi-winding dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220397385.XU CN217468167U (en) | 2022-02-25 | 2022-02-25 | Axial segmentation multi-winding dry-type transformer |
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| Publication Number | Publication Date |
|---|---|
| CN217468167U true CN217468167U (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220397385.XU Active CN217468167U (en) | 2022-02-25 | 2022-02-25 | Axial segmentation multi-winding dry-type transformer |
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| Country | Link |
|---|---|
| CN (1) | CN217468167U (en) |
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- 2022-02-25 CN CN202220397385.XU patent/CN217468167U/en active Active
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