CN211628862U - Power transformer - Google Patents
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- CN211628862U CN211628862U CN201922489999.1U CN201922489999U CN211628862U CN 211628862 U CN211628862 U CN 211628862U CN 201922489999 U CN201922489999 U CN 201922489999U CN 211628862 U CN211628862 U CN 211628862U
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Abstract
The utility model provides a power transformer, include: a winding coil and an oil guide system; lead oily system includes: the oil cooling device comprises an inner cylinder, an outer cylinder, a guide piece, an oil inlet and an oil outlet, wherein an accommodating space for a winding coil and oil for dissipating heat of the winding coil is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder; a first guide piece in the guide pieces is arranged between a first winding coil in the winding coils and the inner cylinder and is attached to the first winding coil and the inner cylinder; a second guide piece of the guide pieces is arranged between a second winding coil of the winding coils and the outer cylinder and is attached to the second winding coil and the outer cylinder; so that the first guide piece and the second guide piece guide the oil entering the accommodating space from the oil inlet, flow through the first winding coil, the first guide piece, the second winding coil and the second guide piece and flow out of the oil outlet. The oil on the winding coil can be better guided by the scheme.
Description
Technical Field
The utility model relates to the technical field of machinery, in particular to power transformer.
Background
When the transformer works, a small part of electric energy is always converted into heat energy. When the transformer is relatively large, the amount of heat it releases is considerable, and if the heat is not removed somehow, the temperature of the transformer will increase and eventually burn out the transformer. In order to solve the problem, people soak the winding coil in transformer oil, and the oil is used for absorbing the heat emitted by the winding coil.
At present, an oil baffle plate for guiding oiling of a winding coil is generally a horizontal straight plate and vertically abuts against an inner cylinder body on the inner diameter side of the winding coil or an outer cylinder body on the outer diameter side of the winding coil.
However, the conventional winding coil is usually wound by hand, and a certain error exists in the roundness of the inner cylinder and the outer cylinder of the transformer, so that the oil baffle plate may not be completely attached to the inner cylinder or the outer cylinder, a gap is generated, oil on the winding coil flows through the gap, and the oil baffle plate has a poor oil baffle effect.
SUMMERY OF THE UTILITY MODEL
The utility model discloses lie in solving above-mentioned and/or other technical problem and providing power transformer, can guide the oil on the winding coil better and realize good radiating effect.
The utility model provides a power transformer, include: a winding coil and an oil guide system;
the oil guide system comprises: the oil cooling device comprises an inner cylinder, an outer cylinder, a guide piece, an oil inlet and an oil outlet, wherein an accommodating space for the winding coil and oil for dissipating heat of the winding coil is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder;
a first one of the guides disposed between a first one of the winding coils and the outer wall of the inner tube and attached to an end portion of the first winding coil facing the outer wall of the inner tube and a portion of the outer wall of the inner tube corresponding to the end portion;
a second one of the guide members disposed between a second one of the winding coils and the inner wall of the outer tube and attached to an end portion of the second winding coil facing the inner wall of the outer tube and a portion of the inner wall of the outer tube corresponding to the end portion;
so that the first and second guides guide the oil, which enters the receiving space from the oil inlet, to flow through the first winding coil, the first guide, the second winding coil, the second guide, and to flow out from the oil outlet.
Preferably, the first and second electrodes are formed of a metal,
the first winding coil and the second winding coil of the winding coils are stacked in an axial direction.
Preferably, the first and second electrodes are formed of a metal,
the oil guide system comprises: at least three guides;
the guide includes: a plurality of first guides and a plurality of second guides;
the winding coil includes: a first winding coil respectively attached to each of the first guides, a second winding coil respectively attached to each of the second guides, and a plurality of third winding coils disposed between the first winding coil and the second winding coil.
Preferably, the first and second electrodes are formed of a metal,
the number of the third winding coils between the first winding coils and the second winding coils adjacent to the oil outlet is less than that between the other adjacent first winding coils and second winding coils.
Preferably, the first and second electrodes are formed of a metal,
the number of the third winding coils between the first winding coils and the second winding coils adjacent to each other is different from the number of the third winding coils between the first winding coils and the second winding coils adjacent to each other.
Preferably, the first and second electrodes are formed of a metal,
and in the direction from the oil outlet to the oil inlet, the number of the third winding coils between the adjacent first winding coils and the second winding coils is increased progressively.
Preferably, the first and second electrodes are formed of a metal,
the winding coil comprises a pancake winding;
at least two cushion blocks are fixed between every two adjacent cakes of the cake-type coil so as to form a gap between the two adjacent cakes, at least one cushion block of the at least two cushion blocks is positioned on the inner cylinder side, and at least one cushion block of the at least two cushion blocks is positioned on the outer cylinder side;
the guide pieces are embedded in two of the spacers adjacent in the axial direction of the winding coil.
Preferably, the first and second electrodes are formed of a metal,
each first guide piece in the guide pieces is fixed on the first winding coil attached to the first guide piece in a dispensing mode;
each of the second guide members is fixed to the second winding coil to which the second guide member is attached in a dispensing manner.
Preferably, the first and second electrodes are formed of a metal,
the guide member has an elliptical cross section in the circumferential direction.
Preferably, the first and second electrodes are formed of a metal,
the guide piece is of a hollow structure, and reinforcing ribs are filled in the hollow structure.
Preferably, the first and second electrodes are formed of a metal,
the guide is a creped paper guide.
The utility model provides a power transformer leads the inner tube among the oil system and can set up in the urceolus for form the accommodation space who is used for leading oil to the winding coil between the outer wall of inner tube and the inner wall of urceolus. Then, the winding coil is arranged in the accommodating space, and a first guide piece of the guide pieces is arranged between a first winding coil of the winding coil and the inner cylinder, so that the first guide piece is attached to the first winding coil and the inner cylinder. And a second guide piece in the guide pieces is arranged between a second winding coil in the winding coils and the outer cylinder, so that the second guide piece is attached to the second winding coil and the inner cylinder, and the first guide piece and the second guide piece are arranged at different turns of different winding coils. For example, in the direction of the axial direction of the winding coil, the next adjacent lead of one first lead is a second lead, the next lead of the second lead is another first lead, and the next lead of the first lead is another second lead. In this way, by the cooperation between the inner tube, the outer tube, and the first guide and the second guide, a bent path for guiding the outflow of the oil on the winding coil can be formed between the inner tube and the outer tube, and since the path has a bent shape, the influence of gravity on the oil flowing on the straight-up and straight-down path can be reduced, the speed of the oil flowing on the path can be increased, and the purpose of guiding the oil on the winding coil more favorably can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power transformer according to another embodiment of the present invention.
In the drawings, 101: inner cylinder, 102: outer cylinder, 103: guide, 104: oil inlet, 105: oil outlet, 106: winding coil, 107: an accommodating space for the winding coil 106 and oil for dissipating heat of the winding coil 106 is formed between the outer wall of the inner cylinder 101 and the inner wall of the outer cylinder 102, 1031: first guide, 1032: second guide, 1061: first winding coil, 1062: and a second winding coil.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a power transformer, including: an iron core and at least one oil conducting system of the power transformer;
the oil guide system comprises: the winding device comprises an inner cylinder 101, an outer cylinder 102, a guide piece 103, an oil inlet 104 and an oil outlet 105, wherein an accommodating space 107 for the winding coil 106 and oil for dissipating heat of the winding coil 106 is formed between the outer wall of the inner cylinder 101 and the inner wall of the outer cylinder 102;
a first lead 1031 of the leads 103, which is disposed between the first winding coil 1061 of the winding coils 106 and the outer wall of the inner cylinder 101, and is attached to an end portion of the first winding coil 1061 facing the outer wall of the inner cylinder 101 and a portion of the outer wall of the inner cylinder 101 corresponding to the end portion;
a second guide 1032 of the guides 103, which is disposed between the second winding coil 1062 of the winding coils 106 and the inner wall of the outer tub 102, and is attached to an end of the second winding coil 1062 facing the inner wall of the outer tub 102 and a portion of the inner wall of the outer tub 102 corresponding to the end;
so that the first and second guides 1031 and 1032 guide the oil entering the receiving space from the oil inlet, flow through the first winding coil 1061, the first guide 1031, the second winding coil 1062, the second guide 1032, and flow out of the oil outlet.
In the present embodiment, the inner cylinder in the oil guiding system can be disposed inside the outer cylinder, so that an accommodating space for guiding oil to the winding coil is formed between an outer wall of the inner cylinder and an inner wall of the outer cylinder. Then, the winding coil is arranged in the accommodating space, and a first guide piece of the guide pieces is arranged between a first winding coil of the winding coil and the inner cylinder, so that the first guide piece is attached to the first winding coil and the inner cylinder. And a second guide piece in the guide pieces is arranged between a second winding coil in the winding coils and the outer cylinder, so that the second guide piece is attached to the second winding coil and the inner cylinder, and the first guide piece and the second guide piece are arranged at different turns of different winding coils. For example, in the direction of the axial direction of the winding coil, the next adjacent lead of one first lead is a second lead, the next lead of the second lead is another first lead, and the next lead of the first lead is another second lead. In this way, by the cooperation between the inner tube, the outer tube, and the first guide and the second guide, a bent path for guiding the outflow of the oil on the winding coil can be formed between the inner tube and the outer tube, and since the path has a bent shape, the influence of gravity on the oil flowing on the straight-up and straight-down path can be reduced, the speed of the oil flowing on the path can be increased, and the purpose of guiding the oil on the winding coil more favorably can be achieved.
Note that, the direction indicated by the arrow in fig. 1 is the direction of oil flow on the winding coil.
In an embodiment of the present invention, the first winding coil 1061 and the second winding coil 1062 of the winding coils 106 are stacked in an axial direction.
In order to improve the speed that the oil on the winding coil flows out the utility model discloses an embodiment, lead oily system and include: at least three guides 103;
the guide includes: a plurality of first guides 1031 and a plurality of second guides 1032;
the winding coil 106 includes: a first winding coil 1061 respectively attached to each of the first lead members 1031 of the plurality of first lead members 1031, a second winding coil 1062 respectively attached to each of the second lead members 1032 of the plurality of second lead members 1032, and a plurality of third winding coils disposed between the first winding coil 1061 and the second winding coil 1062.
In this embodiment, different first guiding elements are arranged on different first winding coils and different second guiding elements are arranged on different second winding coils. In the axial direction of the winding coils, a plurality of third winding coils may be disposed between the adjacent first winding coils and the adjacent second winding coils, so that a certain distance exists between two adjacent first guide pieces and a certain distance exists between two adjacent second guide pieces.
In an embodiment of the present invention, the number of the third winding coils between the first winding coil 1061 and the second winding coil 1062 adjacent to the oil outlet is less than the number of the third winding coils between the first winding coil 1061 and the second winding coil 1062 adjacent to the oil outlet.
In the present embodiment, the smaller the spacing between the adjacent first and second guides in the axial direction of the winding coil, the smaller the width of the oil guiding path formed by the adjacent first and second guides in cooperation with the inner cylinder, the outer cylinder and the winding coil, so that the more oil in the path, the greater the pressure at which the oil is driven to flow, so that the oil in the path forms a pressure flow in the pressure driving direction, and the speed at which the oil flows is increased. By changing the flow speed of the oil, the hot spot temperature of the winding coil relative to the uppermost region where the oil flows out can be effectively reduced, and the cooling effect of the winding coil is improved.
In an embodiment of the present invention, the number of the third winding coils between the adjacent first winding coils 1061 and the adjacent second winding coils 1062 is different from the number of the third winding coils between the adjacent first winding coils 1061 and the adjacent second winding coils 1062.
In the present embodiment, since the smaller the distance between the adjacent first and second guide members in the axial direction of the winding coil, the greater the pressure for driving the flow of oil on the winding coil, in order to ensure that the temperature of the winding coil is within a certain range, the adjacent first and second guide members having a smaller distance may be provided at a position of the winding coil where the temperature is higher, so as to increase the speed of the oil flowing out of the winding coil. At a relatively low temperature on the winding coil, adjacent first and second guides may be provided at a relatively large distance to ensure that the temperature on the winding coil is within a certain range there.
In order to ensure that the temperature of the winding coils is within a certain range, in an embodiment of the present invention, from the oil outlet to the oil inlet, the number of the third winding coils between the adjacent first winding coil 1061 and the second winding coil 1062 is increased progressively.
In the present embodiment, since the temperature of the winding coil closest to the oil outlet is generally higher in the axial direction of the winding coil, the distance between every two adjacent guide pieces gradually increases from the oil outlet to the oil inlet, so that the guide pieces are changed from dense to sparse, that is, the number of the third winding coils between every adjacent first winding coil and second winding coil increases gradually. The width of an oil guide path formed by matching the guide piece with the inner cylinder, the outer cylinder and the winding coil is changed through the distance between the guide pieces, so that the flowing speed of oil is changed, the temperature rise of hot spots in the local area of the upper part of the coil is effectively reduced, the service life of the transformer is prolonged, the number of the guide pieces on the winding coil is reduced to the greatest extent, and the oil guide cost of the transformer is reduced.
In an embodiment of the present invention, as shown in fig. 2, the winding coil 106 includes a pancake coil;
at least two cushion blocks 201 are fixed between every two adjacent cakes of the cake-shaped coil so as to form a gap between the two adjacent cakes, at least one cushion block 201 of the at least two cushion blocks 201 is positioned on the inner cylinder 101 side, and at least one cushion block 201 of the at least two cushion blocks 201 is positioned on the outer cylinder 102 side;
the guide members 103 are embedded in two of the spacers 201 adjacent to each other in the axial direction of the winding coil 106.
In this embodiment, the pancake coil, also called an overlapping winding coil, is a circuit part in the transformer, and the pancake coil generally divides the high-voltage winding and the low-voltage winding into a plurality of wire cakes which are alternately arranged along the height of a core column of the transformer, and each wire cake is composed of at least one coil. In order to form a path for guiding oil on the winding coil to flow out, at least one cushion block is arranged on the outer cylinder side between every two connected cakes, at least one cushion block is arranged on the inner cylinder side between every two adjacent cakes, and a gap is formed between the two connected cakes through the support of the cushion blocks between the two connected cakes. The guide pieces are embedded into two adjacent cushion blocks in the axial direction of the winding coil, the guide pieces can be clamped and fixed through the two adjacent cushion blocks, the stability of the guide pieces is guaranteed, two sides of a first guide piece in the guide pieces are respectively attached to the winding coil and the inner cylinder, two sides of a second guide piece in the guide pieces are respectively attached to the winding coil and the outer cylinder, and a bending type oil guide path is formed through the cooperation of the first guide piece, the second guide piece, the inner cylinder, the outer cylinder and the winding coil.
Specifically, fig. 2 is a schematic view of the radial direction of the winding coil.
In an embodiment of the present invention, each first guiding member 1031 of the guiding members 103 is fixed on the first winding coil 1061 attached by the first guiding member 1031 in a dispensing manner;
each of the second guides 1032 of the guides 103 is fixed to the second winding coil 1062 to which the second guide 1032 is attached in a dispensing manner.
In this embodiment, the first guiding element is attached to the first winding coil and the second guiding element is attached to the second winding coil by electronic glue, oil or other liquid, so that seamless attachment between the first guiding element and the first winding coil and the inner cylinder is ensured, seamless attachment between the second guiding element and the second winding coil and the outer cylinder is ensured, incomplete attachment between the first guiding element and the first winding coil and the inner cylinder is avoided, or incomplete attachment between the second guiding element and the second winding coil and the outer cylinder is avoided, and thus the oil on the winding coil flows through the gap to cause poor oil blocking effect.
In an embodiment of the present invention, the cross section of the guide 103 along the circumferential direction is oval.
In this embodiment, the guide is a guide having an elliptical shape, i.e. a tubular guide. The end face of the guide is oval in shape. The minor axis of the elliptical first guide is perpendicular to the inner cylinder, and the minor axis of the elliptical second guide is perpendicular to the outer cylinder, so that both sides of the first one of the guides are more closely attached to the winding coil and the inner cylinder, and both sides of the second one of the guides are more closely attached to the winding coil and the outer cylinder without gaps.
In an embodiment of the present invention, the guiding member 103 is a hollow structure, and the hollow structure is filled with a reinforcing rib.
Specifically, in order to prevent that production, installation at the guide piece from taking place deformation, influence and keep off oily effect, the inside of guide piece is hollow structure, and it has the strengthening rib to fill in hollow structure to make guide piece and inner tube or urceolus laminate completely through the strengthening rib, guarantee to keep off oily effect.
In an embodiment of the invention, the guide 103 is a crepe paper guide.
Particularly, due to the characteristic of good toughness of the crepe paper, the crepe paper guide piece is not easy to deform and process in the production and manufacturing process, so that the difficulty of the guide piece production can be reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Finally, it is to be noted that: the above description is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.
Claims (10)
1. A power transformer, comprising: a winding coil and an oil guide system;
the oil guide system comprises: the cooling device comprises an inner cylinder (101), an outer cylinder (102), a guide piece (103), an oil inlet (104) and an oil outlet (105), wherein a containing space (107) for the winding coil (106) and oil for dissipating heat of the winding coil (106) is formed between the outer wall of the inner cylinder (101) and the inner wall of the outer cylinder (102);
a first guide (1031) of the guides (103) disposed between a first winding coil (1061) of the winding coils (106) and the outer wall of the inner tube (101) and abutting on an end portion of the first winding coil (1061) facing the outer wall of the inner tube (101) and a portion of the outer wall of the inner tube (101) corresponding to the end portion;
a second guide (1032) of the guides (103), which is disposed between a second winding coil (1062) of the winding coils (106) and the inner wall of the outer tub (102), and which is in contact with an end of the second winding coil (1062) facing the inner wall of the outer tub (102) and a portion of the inner wall of the outer tub (102) corresponding to the end;
so that the first and second guides (1031, 1032) guide the oil entering the receiving space from the oil inlet, flow through the first winding coil (1061), the first guide (1031), the second winding coil (1062), the second guide (1032), and flow out of the oil outlet.
2. A power transformer according to claim 1,
the first winding coil (1061) and the second winding coil (1062) of the winding coils (106) are stacked in an axial direction.
3. A power transformer according to claim 2,
the oil guide system comprises: at least three guides (103);
the guide includes: a plurality of first guides (1031) and a plurality of second guides (1032);
the winding coil (106) comprises: a first winding coil (1061) respectively engaged with each of the first leads (1031) of the plurality of first leads (1031), a second winding coil (1062) respectively engaged with each of the second leads (1032) of the plurality of second leads (1032), and a plurality of third winding coils disposed between the first winding coil (1061) and the second winding coil (1062).
4. A power transformer according to claim 3,
the number of the third winding coils between the first winding coil (1061) and the second winding coil (1062) adjacent to the oil outlet is less than the number of the third winding coils between the other adjacent first winding coil (1061) and the second winding coil (1062).
5. A power transformer according to claim 3,
the number of the third winding coils between the adjacent first winding coils (1061) and the second winding coils (1062) is different from the number of the third winding coils between the other adjacent first winding coils (1061) and the second winding coils (1062).
6. A power transformer according to claim 5,
the number of the third winding coils between the adjacent first winding coils (1061) and the second winding coils (1062) is increased in the direction from the oil outlet to the oil inlet.
7. A power transformer according to claim 1, characterized in that the winding coil (106) comprises a pancake winding;
at least two cushion blocks (201) are fixed between every two adjacent cakes of the cake-shaped coil so as to form a gap between the two adjacent cakes, at least one cushion block (201) of the at least two cushion blocks (201) is positioned on the inner cylinder (101) side, and at least one cushion block (201) of the at least two cushion blocks (201) is positioned on the outer cylinder (102) side;
the guide pieces (103) are embedded in two adjacent spacers (201) in the axial direction of the winding coil (106).
8. A power transformer according to claim 1,
each first guide part (1031) in the guide parts (103) is fixed on the first winding coil (1061) attached by the first guide part (1031) in a dispensing manner;
each second guide part (1032) of the guide parts (103) is fixed on the second winding coil (1062) attached to the second guide part (1032) in a dispensing manner.
9. A power transformer according to claim 1,
the guide (103) has an elliptical cross section in the circumferential direction.
10. A power transformer according to any one of claims 1 to 9,
the guide piece (103) is of a hollow structure, and reinforcing ribs are filled in the hollow structure;
and/or the presence of a gas in the gas,
the guide (103) is a creped paper guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922489999.1U CN211628862U (en) | 2019-12-31 | 2019-12-31 | Power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922489999.1U CN211628862U (en) | 2019-12-31 | 2019-12-31 | Power transformer |
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| Publication Number | Publication Date |
|---|---|
| CN211628862U true CN211628862U (en) | 2020-10-02 |
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| CN201922489999.1U Active CN211628862U (en) | 2019-12-31 | 2019-12-31 | Power transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599338A (en) * | 2020-12-03 | 2021-04-02 | 常州西电变压器有限责任公司 | Oil baffle plate capable of being changed in shape |
-
2019
- 2019-12-31 CN CN201922489999.1U patent/CN211628862U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599338A (en) * | 2020-12-03 | 2021-04-02 | 常州西电变压器有限责任公司 | Oil baffle plate capable of being changed in shape |
| CN112599338B (en) * | 2020-12-03 | 2022-08-23 | 常州西电变压器有限责任公司 | Oil baffle plate capable of being changed in shape |
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