CN113517121A

CN113517121A - Novel U-shaped double-layer spiral winding structure

Info

Publication number: CN113517121A
Application number: CN202110816859.XA
Authority: CN
Inventors: 刘广西; 孙日明; 王艳萍; 杨剑
Original assignee: Chengdu Shuangxing Transformer Co ltd
Current assignee: Chengdu Shuangxing Transformer Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2021-10-19

Abstract

The invention discloses a novel U-shaped double-layer spiral winding structure which comprises an inner paper tube, a stay, an inner layer spiral winding and an outer layer spiral winding, wherein the stay is arranged around the inner paper tube, the inner layer spiral winding and the outer layer spiral winding are sequentially arranged around the inner paper tube, an axial oil duct is arranged between the inner layer spiral winding and the outer layer spiral winding, and end rings are respectively arranged at the same ends of the inner layer spiral winding and the outer layer spiral winding. This new U type double-deck spiral winding structure, the number of insulators reduces, and processing is simple, and insulating distance reduces reduce cost.

Description

Novel U-shaped double-layer spiral winding structure

Technical Field

The invention belongs to the technical field of transformers, and particularly relates to a novel U-shaped double-layer spiral winding structure.

Background

The U-shaped double-layer spiral winding is used for low-voltage windings of an axial split transformer and an extra-large capacity power transformer. Compared with the common spiral winding, the difference is that the first and the last outgoing lines are led out from the same side of the winding. Therefore, the length of the lead can be reduced, and the unbalance rate of the three-phase resistance is easy to realize. Because the spiral angles of the inner and outer layer spiral windings are opposite, two supporting strips and a layer of paper board are generally added between the inner layer spiral winding and the outer layer spiral winding, so that the insulation distance between the inner and outer layer windings is large, and the cost of the transformer is increased. In addition, the inner layer and the outer layer of spiral windings need to be provided with respective inner paper tubes, supporting strips and oil duct cushion blocks, so that the number of insulating parts, the manufacturing difficulty and the workload are increased.

Disclosure of Invention

The invention aims to provide a novel U-shaped double-layer spiral winding structure to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel double-deck spiral winding structure of U type, includes interior fiber container, stay, inlayer spiral winding and outer spiral winding, the stay encircles the setting of interior fiber container, inlayer spiral winding and outer spiral winding encircle interior fiber container in proper order and set up, be provided with the axial oil duct between inlayer spiral winding and the outer spiral winding, the end circle has been placed respectively with outer spiral winding's the same end to inlayer spiral winding.

According to a preferable technical scheme, the inner-layer spiral winding comprises a stay, a lead and an oil duct cushion block, bosses are arranged on two sides of the stay, openings are formed in two ends of the cushion block, and grooves which are abutted to the bosses and slide towards the inner side of the cushion block are formed in the bottoms of the openings;

the supporting strips are surrounded into an annular cylinder structure through a plurality of groups of supporting strips which correspond to each other in pairs, the supporting strips are supported in the grooves of the cushion blocks in a butting mode through bosses at two ends of the cushion blocks, and the cushion blocks are wound with conducting wires.

As a preferred technical scheme of the invention, after each layer of cushion block is fully wound with the wire, the wire is wound on the surface of the wire after another layer of oil duct cushion block is paved on the upper surface of the wire.

As a preferred technical solution of the present invention, the wire is of an integral structure, a bending portion of the wire when the wire is wound from a lower layer to a higher layer is an inner layer partial bending portion on the inner layer spiral winding, and a bending portion of the wire when the wire is wound from a lower layer to a higher layer is an outer layer partial bending portion on the outer layer spiral winding.

As a preferred technical solution of the present invention, the inner layer spiral winding and the outer layer spiral winding are the same type of winding, and the spiral winding directions of the inner layer spiral winding and the outer layer spiral winding are opposite.

As a preferable technical scheme of the invention, the axial oil passage and the oil passage cushion block are both made of insulating materials.

As a preferable technical scheme of the invention, the inner layer spiral winding and the outer layer spiral winding share a set of inner paper tube, stay and oil duct cushion block.

As a preferable technical scheme of the invention, the axial oil duct is formed by hot pressing of paper strips and cushion blocks.

The invention has the technical effects and advantages that:

1. the inner and outer layer spiral windings adopt a bending spiral structure without a spiral angle.

2. And no interlayer supporting strips and paper tubes are arranged between the inner layer winding and the outer layer winding, so that the overall size of the winding is reduced.

3. The insulation distance between the inner and outer layer windings is shortened, the tightness is better, the inner and outer layer spiral windings can be continuously wound, and the integral continuity is better.

4. The number of the insulators is reduced, the processing is simple, the insulation distance of the inner and outer spiral windings is shortened, and the cost is reduced.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is a schematic view of the main structure of the present invention;

FIG. 3 is a schematic view of the structure of the spacer of the present invention;

FIG. 4 is a schematic view of a stay of the present invention;

fig. 5 is a schematic structural view of the axial oil passage of the present invention.

In the figure: 1. an inner paper tube; 2. a stay; 3. an inner layer spiral winding; 4. an outer layer spiral winding; 5. an axial oil passage; 6. an oil duct cushion block; 7. an end ring; 8. a bending part is pressed; 9. a boss; 10. a wire; 11. the outer layer is locally bent; 12. an opening; 13. and (4) a groove.

Detailed Description

The technical solutions 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 it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.

The invention provides a novel U-shaped double-layer spiral winding structure as shown in figures 1, 2, 3, 4 and 5, which comprises an inner paper tube 1, a stay 2, an inner-layer spiral winding 3 and an outer-layer spiral winding 4, wherein the stay 2 is arranged around the inner paper tube 1, the inner-layer spiral winding 3 and the outer-layer spiral winding 4 are sequentially arranged around the inner paper tube 1, an axial oil duct 5 is arranged between the inner-layer spiral winding 3 and the outer-layer spiral winding 4, the axial oil duct 5 is formed by hot pressing of paper strips and cushion blocks, and end rings 7 are respectively arranged at the same ends of the inner-layer spiral winding 3 and the outer-layer spiral winding 4.

In the specific implementation process, the inner-layer spiral winding 3 comprises a stay 2, a lead 10 and an oil duct cushion block 6, bosses 9 are arranged on two sides of the stay 2, openings 12 are formed in two ends of the cushion block, and a groove 13 which is abutted to the bosses 9 and slides towards the inner side of the cushion block is formed in the bottom of each opening 12;

a plurality of groups of supporting strips 2 corresponding to each other in pairs form an annular cylinder structure, the supporting strips 2 are supported in grooves 13 of the cushion blocks in an abutting mode through bosses 9 at two ends of the cushion blocks, and the cushion blocks are wound with wires 10.

In the specific implementation process, after each layer of cushion block is fully wound around the wire 10, a layer of oil duct cushion block is laid on the upper surface of the wire 10, and then the wire 10 is wound on the surface of the wire.

Referring to fig. 2 and 3, the lead 10 is an integral structure, a multi-hoop lead 10 is wound on each layer of cushion block, and the multi-hoop lead 10 is located on the same horizontal plane, so that the laying of the oil duct cushion block 6 is always kept horizontal, on the inner layer spiral winding 3, the bending part of the lead 10 when the lead is wound from the lower layer to the higher layer is an inner layer local bending part 8, and on the outer layer spiral winding 4, the bending part of the lead 10 when the lead is wound from the lower layer to the higher layer is an outer layer local bending part 14, which is equivalent to centralizing the circumferential helix angle to the local bending part.

In the specific implementation process, the inner layer spiral winding 3 and the outer layer spiral winding 4 are the same type of winding, and the spiral winding directions of the inner layer spiral winding and the outer layer spiral winding are opposite.

In the specific implementation process, the axial oil duct 5 and the oil duct cushion block 6 are both made of insulating materials, the number of insulators is small, the machining is simple, the distance between the insulators is small, and the cost is reduced.

Referring to fig. 2 and 3, the stay 2 is perpendicular to the lead 10, and the coil short-circuit force in the case of short circuit is perpendicular, and is vertically pressed onto the lead 10 through the cushion block without other directional components, so that the stability of the coil of the lead 10 is improved.

The inner layer spiral winding 3 and the outer layer spiral winding 4 share one set of inner paper tube 1, stay 2 and oil duct cushion block 6.

In summary, the following steps: this novel double-deck spiral winding structure of U type, including interior fiber container 1, stay 2, inlayer spiral winding 3 and outer spiral winding 4, stay 2 encircles 1 settings of interior fiber container, inlayer spiral winding 3 and outer spiral winding 4 encircle interior fiber container 1 in proper order and set up, be provided with axial oil duct 5 between inlayer spiral winding 3 and the outer spiral winding 4, the oil groove has been seted up to axial oil duct 5, it is provided with oil duct cushion 6 to correspond the oil groove, end circle 7 has been placed respectively to inlayer spiral winding 3 and outer spiral winding 4 same end.

Bosses 9 are arranged on two sides of the stay 2, openings 12 are arranged on two ends of the cushion block, grooves 13 which are abutted to the bosses 9 and slide are arranged at the bottom of the openings 12 towards the inner side of the cushion block, a plurality of groups of pairwise corresponding stay 2 surround to form an annular cylinder structure, the bosses 9 at two ends of the cushion block are abutted to the grooves 13 of the cushion block to complete the support of the stay 2, a plurality of hooped leads 10 are wound on each layer of cushion block, the hooped leads 10 are positioned on the same horizontal plane, so that the laying of the cushion block is always kept horizontal, a bending part 8 is arranged at the bending part when the leads 10 are wound from a lower layer to a higher layer, the leads 10 are wound on the cushion block, after local bending, the rest most of the leads 10 are ensured to be in a horizontal state, the two ends of the bending part 8 are in a horizontal state, which is equivalent to centralizing a circumferential helical angle to a local bending place, the stay 2 and the leads 10 are in a vertical relation, and the coil short-circuit force is in a vertical state under the short-circuit condition, the cushion block is vertically pressed on the wire 10, no other directional component exists, and the stability of the coil of the wire 10 is improved.

In the description of the present invention, it is to be understood that, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, it is merely for convenience of describing and simplifying the description, and it is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a novel double-deck spiral winding structure of U type, includes interior fiber container (1), support bar (2), inlayer spiral winding (3) and outer spiral winding (4), its characterized in that: stay (2) encircle interior fiber container (1) and set up, inner layer spiral winding (3) and outer spiral winding (4) encircle interior fiber container (1) setting in proper order, be provided with axial oil duct (5) between inner layer spiral winding (3) and outer spiral winding (4), end circle (7) have been placed respectively to the same one end of inner layer spiral winding (3) and outer spiral winding (4).

2. A new U-shaped double layer spiral winding structure according to claim 1, characterized in that: the inner-layer spiral winding (3) comprises a stay (2), a lead (10) and an oil duct cushion block (6), bosses (9) are arranged on two sides of the stay (2), openings (12) are formed in two ends of the cushion block, and a groove (13) which is abutted to the bosses (9) and slides towards the inner side of the cushion block is formed in the bottom of each opening (12);

the supporting strips (2) are in pairwise correspondence to form an annular cylindrical structure, the bosses (9) at the two ends of the cushion block are abutted against the grooves (13) of the cushion block to support the supporting strips (2), and the supporting strips (2) are wound with wires (10).

3. A new U-shaped double layer spiral winding structure according to claim 2, characterized in that: after each layer of cushion block is fully wound with the lead (10), a layer of oil duct cushion block (6) is paved on the upper surface of the lead (10), and then the lead (10) is wound on the surface of the lead again.

4. A new U-shaped double layer spiral winding structure according to claim 2, characterized in that: wire (10) structure as an organic whole, on inlayer spiral winding (3), wire (10) are from low one deck for inlayer local bending portion (8) to the bending department when high one deck coiling, on outer spiral winding (4), wire (10) are from low one deck for outer local bending portion (14) to the bending department when high one deck coiling.

5. A new U-shaped double layer spiral winding structure according to claim 1, characterized in that: the inner layer spiral winding (3) and the outer layer spiral winding (4) are the same type of winding, and the spiral winding directions of the inner layer spiral winding and the outer layer spiral winding are opposite.

6. A new U-shaped double layer spiral winding structure according to claim 2, characterized in that: the axial oil duct (5) and the oil duct cushion block (6) are both made of insulating materials.

7. A new U-shaped double layer spiral winding structure according to claim 2, characterized in that: the inner-layer spiral winding (3) and the outer-layer spiral winding (4) share one set of inner paper tube (1), supporting strips (2) and oil duct cushion blocks (6).

8. A new U-shaped double layer spiral winding structure according to claim 1, characterized in that: the axial oil duct (5) is formed by hot pressing of paper strips and cushion blocks.