CN115732187A

CN115732187A - Oil-immersed iron core structure adopting U-shaped iron yoke structure and reactor

Info

Publication number: CN115732187A
Application number: CN202211568436.1A
Authority: CN
Inventors: 王小娟; 沈钰伟; 华佳佳; 曹峰
Original assignee: Nissin Electric Wuxi Co Ltd
Current assignee: Nissin Electric Wuxi Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-03-03

Abstract

The invention relates to an oil-immersed iron core structure adopting a U-shaped iron yoke structure. The invention comprises an iron core column, wherein a winding is sleeved on the iron core column; the iron yoke part comprises an upper iron yoke and a lower iron yoke, the upper iron yoke and the lower iron yoke are respectively connected to two ends of the iron core column and are matched with the iron core column to form a closed magnetic circuit; the upper iron yoke and the lower iron yoke are both stacked to form a double-U-shaped structure, the double-U-shaped structure comprises a first stacked edge, two ends of the first stacked edge respectively extend along two opposite sides of the first stacked edge to form two U-shaped stacked rings which are symmetrically arranged, each U-shaped stacked ring is provided with a second stacked edge between the U-shaped stacked ring and the first stacked edge, and the second stacked edge is respectively provided with an insulating plate between the U-shaped stacked ring and the first stacked edge. The invention can effectively absorb the leakage magnetic flux between the core column and the end part of the iron yoke, solve the problem of local overheating and effectively prevent the heating phenomenon caused by the leakage magnetic flux entering the box wall.

Description

Oil-immersed iron core structure adopting U-shaped iron yoke structure and reactor

Technical Field

The invention relates to the technical field of power equipment design and manufacture, in particular to an oil-immersed iron core structure adopting a U-shaped iron yoke structure and a reactor.

Background

A linear three-phase oil immersed iron core reactor and a single-phase oil immersed reactor are provided, wherein an iron yoke is generally in a common lamination type, and local overheating is easily caused due to the action of leakage magnetic flux when magnetic flux enters the iron yoke from a core column. The existing high-voltage oil-immersed iron core reactor can be provided with magnetic shielding to reduce influence, but the cost is increased, and the process requirement is high.

Disclosure of Invention

Therefore, the invention provides an oil immersed iron core structure adopting a U-shaped iron yoke structure and a reactor, which improve the iron core structure of the reactor, and add a winding U-shaped structure on the basis of the original laminated iron yoke, so that the magnetic flux of an iron core column of the reactor flows in a U-shaped laminated ring shape when entering the iron yoke, and the local overheating caused by the right-angle entering is avoided.

In order to solve the above technical problem, the present invention provides an oil-immersed core structure using a U-shaped yoke structure, including:

the iron core column is sleeved with a winding;

the iron yoke part comprises an upper iron yoke and a lower iron yoke, the upper iron yoke and the lower iron yoke are respectively connected to two ends of the iron core column and are matched with the iron core column to form a closed magnetic circuit;

the upper iron yoke and the lower iron yoke are both stacked to form a double-U-shaped structure, the double-U-shaped structure comprises a first stacked edge, two ends of the first stacked edge respectively extend along two opposite sides of the first stacked edge to form two U-shaped stacked rings which are symmetrically arranged, each U-shaped stacked ring is provided with a second stacked edge between the U-shaped stacked ring and the first stacked edge, and the second stacked edge is respectively provided with an insulating plate between the U-shaped stacked ring and the first stacked edge.

In one embodiment of the present invention, a first connecting through hole is formed along an axial direction of the core limb, and a second connecting through hole matched with the first connecting through hole is formed in the first stacked edge.

In an embodiment of the present invention, two ends of the U-shaped stacking ring are respectively U-shaped structures, and each U-shaped structure includes an arc-shaped side and two straight sides connected to the arc-shaped side.

In one embodiment of the invention, a through cavity is formed between the U-shaped structure and the second stacking edge.

In one embodiment of the present invention, the insulating plates are respectively disposed between the second stacked edge and the two straight edges.

In one embodiment of the present invention, three core legs are arranged between the upper and lower yokes.

In one embodiment of the present invention, a ground wire is connected to the upper iron yoke and/or the lower iron yoke.

In an embodiment of the present invention, the iron core column further includes a fastening fitting, and the upper iron yoke and the lower iron yoke are connected to upper and lower ends of the iron core column respectively through the fastening fitting.

In an embodiment of the present invention, the fastening hardware is distributed with a yoke fastening bolt.

The invention also provides a reactor which comprises the oil immersed iron core structure adopting the U-shaped iron yoke structure.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the oil immersed iron core structure adopting the U-shaped iron yoke structure improves the iron core structure of the reactor, and adds the winding U-shaped structure on the basis of the original laminated iron yoke, so that the magnetic flux of the iron core column of the reactor flows into the iron yoke in a U-shaped laminated annular manner when entering the iron yoke, and the local overheating caused by the right-angle entering is avoided.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.

Fig. 1 is a schematic structural diagram of an overall oil-immersed core structure of a U-shaped yoke structure according to the present invention.

Fig. 2 is a schematic view of the iron yoke structure of the present invention.

Fig. 3 is a partially enlarged view of fig. 2.

Fig. 4 is a schematic view of fastening fitting connection.

Description reference numbers indicate: 1. an iron core column; 11. a first connecting through hole; 2. an iron yoke; 21. an upper iron yoke; 22. a lower iron yoke; 3. a first stacking edge; 31. a second connecting through hole; 4. a U-shaped stacking ring; 41. an arc-shaped edge; 42. straight sides; 5. a second stacking edge; 6. an insulating plate; 7. a cavity is communicated; 8. a ground lead; 9. fastening a hardware fitting; 10. and a yoke part is fastened with a bolt.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1 to 4, an oil-immersed core structure using a U-shaped yoke structure according to the present invention includes:

the winding comprises a core limb 1, wherein the core limb 1 is sleeved with a winding;

the magnetic core comprises a core limb 2, wherein the core limb 2 comprises an upper core limb 21 and a lower core limb 22, the upper core limb 21 and the lower core limb 22 are respectively connected to two ends of the core limb 1 and are matched with the core limb 1 to form a closed magnetic circuit;

wherein, it is two U type structures with lower yoke 22 equal stack of upper yoke 21, two U type structures include first stack limit 3, the both ends of first stack limit 3 extend respectively and form two U type stack rings 4 that the symmetry set up along the relative both sides in first stack limit 3 respectively, every be equipped with second stack limit 5 between U type stack ring 4 and the first stack limit 3, second stack limit 5 respectively with U type stack ring 4 and first stack limit 3 between be equipped with insulation board 6.

Specifically, a first connecting through hole 11 is formed along the axial direction of the core limb 1, and the first stacking edge 3 is provided with a second connecting through hole 31 which is matched with the first connecting through hole 11. Facilitating the axial connection between the core limb 1 and the upper and

lower yokes

21, 22. In this embodiment, the connection is performed by a screw.

Specifically, two ends of the U-shaped stacking ring 4 are respectively U-shaped structures, and each U-shaped structure includes an arc-shaped edge 41 and two straight edges 42 connected to the arc-shaped edge 41.

In particular, a through cavity 7 is formed between the U-shaped structure and the second stacking edge 5.

Specifically, the insulating plates 6 are respectively disposed between the second stacked edge 5 and the two straight edges 42. Through the arrangement, the insulating plate 6 has large magnetic resistance, can isolate magnetic lines of force and guide the magnetic lines of force to flow along the U-shaped directions at the two ends

Specifically, three core legs 1 are arranged side by side between the upper and

lower yokes

21 and 22.

Specifically, the upper iron yoke 21 and/or the lower iron yoke 22 are connected with a grounding wire 8, so that the iron core is conveniently grounded.

Specifically, the iron core column comprises a fastening hardware 9, wherein the upper iron yoke 21 and the lower iron yoke 22 are respectively fixed at the upper end and the lower end of the iron core column 1 through the fastening hardware 9, and yoke fastening bolts 10 are distributed on the fastening hardware 9.

The invention provides a reactor which comprises the oil immersed iron core structure adopting the U-shaped iron yoke structure. The reactor iron core structure is improved, a winding U-shaped structure is added on the basis of the original laminated iron yoke, so that the magnetic flux of the iron core column 1 of the reactor flows into the iron yoke in a U-shaped laminated ring 4 shape when entering the iron yoke, and the phenomenon that the magnetic flux enters the iron yoke at a right angle to generate local overheating is avoided.

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. The utility model provides an adopt oily formula iron core structure of U type indisputable yoke structure which characterized in that includes:

the winding comprises an iron core column (1), wherein a winding is sleeved on the iron core column (1);

the magnetic core comprises a core yoke part (2), wherein the core yoke part (2) comprises an upper core yoke (21) and a lower core yoke (22), the upper core yoke (21) and the lower core yoke (22) are respectively connected to two ends of a core limb (1) and matched with the core limb (1) to form a closed magnetic circuit;

the upper iron yoke (21) and the lower iron yoke (22) are of a double-U-shaped structure in an all-stacking mode, the double-U-shaped structure comprises a first stacking edge (3), two ends of the first stacking edge (3) respectively extend along two opposite sides of the first stacking edge (3) to form two U-shaped stacking rings (4) which are symmetrically arranged, each U-shaped stacking ring (4) is provided with a second stacking edge (5) between the first stacking edge (3) and the U-shaped stacking ring (4), and an insulating plate (6) is arranged between the second stacking edge (5) and the U-shaped stacking rings (4) and the first stacking edge (3).

2. An oil-immersed core structure adopting a U-shaped yoke structure according to claim 1, wherein a first connecting through hole (11) is formed along the axial direction of the core limb (1), and the first stacking edge (3) is provided with a second connecting through hole (31) matched with the first connecting through hole (11).

3. The oil-immersed iron core structure with the U-shaped iron yoke structure according to claim 1, wherein the U-shaped stacking ring (4) has a U-shaped structure at each of its two ends, and the U-shaped structure includes an arc-shaped side (41) and two straight sides (42) connected to the arc-shaped side (41).

4. Oil-immersed core structure with U-shaped yoke structure according to claim 3, characterized in that the U-shaped structure and the second stacked edge (5) form a through cavity (7) therebetween.

5. The oil-immersed iron core structure adopting the U-shaped iron yoke structure according to claim 3, wherein the insulating plates (6) are respectively arranged between the second stacked edge (5) and the two straight edges (42).

6. An oil-immersed core structure adopting a U-shaped iron yoke structure according to claim 1, wherein three core legs (1) are arranged between the upper iron yoke (21) and the lower iron yoke (22) side by side.

7. The oil-immersed core structure with the U-shaped iron yoke structure according to claim 1, wherein the upper iron yoke (21) and/or the lower iron yoke (22) is/are connected with a grounding wire (8).

8. The oil-immersed core structure adopting the U-shaped iron yoke structure according to claim 1, further comprising fastening fittings (9), wherein the upper iron yoke (21) and the lower iron yoke (22) are respectively connected to the upper end and the lower end of the core limb (1) through the fastening fittings (9).

9. The oil-immersed iron core structure adopting the U-shaped iron yoke structure according to claim 8, wherein yoke fastening bolts (10) are distributed on the fastening hardware (9).

10. A reactor characterized by comprising the oil-filled core structure using a U-shaped yoke structure according to any one of claims 1 to 9.