KR20160003304U

KR20160003304U - Structure of winding part of oil immersed transformer

Info

Publication number: KR20160003304U
Application number: KR2020150001654U
Authority: KR
Inventors: 조현수
Original assignee: 현대중공업 주식회사
Priority date: 2015-03-17
Filing date: 2015-03-17
Publication date: 2016-09-28

Abstract

A winding structure of an input transformer in which cooling performance of a winding is improved is disclosed.
A winding structure of an improved inflow transformer is disclosed that includes a winding disposed with a gap and a barrier disposed on either side of the winding, wherein an oil flows around the winding and coils the winding of the inflowing transformer A washer extending in the winding direction in the barrier and disposed between the winding and the winding, the washer guiding oil to the gap between the winding and the winding; And a flow loss reducing section that forms a corner portion where the washer and the barrier are connected to each other along the flow direction of the oil.
According to the structure of the winding section of such an input transformer, the winding cooling performance can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an induction transformer,

The present invention relates to a winding portion structure of an input transformer, and more particularly to a winding portion structure of an input transformer in which cooling performance of a winding is improved.

The induction transformer generates heat during operation, and the generated heat is radiated into the outside air by radiation or convection through the insulating oil filled in the transformer. The temperature increases while the heat generation amount is larger than the heat radiation amount. However, When the equilibrium is maintained, the temperature is kept constant.

Such an input transformer has a low-voltage winding disposed inside and a high-voltage winding disposed outside.

Here, each of the windings is constituted by a conductor of a flat wire shape and wound by a required number of turns.

FIG. 1 is a cross-sectional view schematically showing a winding portion of an inflow transformer according to a conventional technique, and FIG. 2 is a view showing oil flow characteristics of a corner portion of a washer and a barrier of the winding portion shown in FIG.

1, a conventional wind blowing transformer has a plurality of windings 10 arranged at intervals in a height direction or a width direction, a barrier 20 disposed on both sides of the windings 10, And a plurality of washers 30 arranged in a staggered manner in the barrier 20.

Here, the washer 30 is alternately arranged in each of the two barriers 20 so as to form a zigzag flow path between the both barriers 20.

The oil (insulating oil) flowing around the windings 10 is guided by the gap between the windings 10 and the windings 10 through the washer 30 and flows in a zigzag form to efficiently wind the windings 10 .

However, in the winding section of the conventional inflow transformer, the corner portions to which the barrier 20 and the washer 30 are connected are formed at right angles, resulting in a flow loss of the oil.

In other words, as shown in Fig. 2, the winding portion of the inflow transformer according to the conventional technique is formed in such a manner that the corner portion of the barrier 20 and the washer 30, that is, There is a problem in that the oil hits against the wall of the corner portion, so that a vortex occurs at the corner portion and consequently the flow velocity of the oil decreases.

As described above, when the flow velocity of the oil for cooling the coil 10 is reduced, the cooling effect of the coil 10 is lowered.

It is an object of the present invention to provide a winding structure of an input transformer in which the flow speed of oil for cooling a winding is improved as one aspect.

As one aspect to achieve at least some of the above-mentioned objects, the present invention is directed to a cooling device comprising a winding arranged with an interval and a barrier disposed on both sides of the winding, wherein oil flows around the winding A washer which extends in the winding direction in the barrier and which is disposed between the winding and the winding and guides the oil at an interval between the winding and the winding; And a flow loss reduction portion that forms a corner portion where the washer and the barrier are connected to each other along a flow direction of the oil.

In one embodiment, the washer may be alternately provided in the barrier disposed on either side such that the flow path of the oil flowing around the windings is zigzag-shaped.

Further, in one embodiment, the flow loss reducing portion may be formed integrally with the washer.

Further, in one embodiment, the flow loss reduction portion may be formed curved at a radius of curvature where the cross-sectional area of the oil flow path is maintained or expanded.

To this end, the flow loss reduction section may be formed such that the shortest distance from the edge of the winding to the flow loss reduction section is equal to or shorter than the shortest distance to the winding and the barrier or the washer.

According to one embodiment of the present invention having such a configuration, an effect of improving winding cooling performance can be obtained.

1 is a cross-sectional view showing a winding portion of an input transformer according to a conventional technique;
Fig. 2 is a view showing the oil flow characteristics at the corner portion of the washer and the barrier included in the winding portion of the inflow transformer shown in Fig. 1; Fig.
3 is a cross-sectional view illustrating the structure of a winding section of an input transformer according to one embodiment of the present invention;
Fig. 4 is a diagram showing the oil flow characteristics at the corner portion of the washer and the barrier included in the winding structure of the inflow transformer shown in Fig. 3; Fig.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

3 and 4, a structure of a winding portion of an input transformer according to an embodiment of the present invention will be described.

3 and 4, the winding structure 100 of the input transformer according to one embodiment of the present invention includes a winding 110, a barrier 120, a washer 130, and a flow loss reduction section 140 ).

The windings 110 may be arranged with a plurality of intervals in the height direction or the width direction as shown in FIG.

The winding 110 is not particularly limited and may be composed of various types of low-voltage windings and high-voltage windings included in known inflow transformers.

In addition, the winding 110 is disposed inside a transformer tank (not shown), and the inside of the transformer tank is filled with oil (insulating oil).

Here, the oil flows around the winding 110 and cools the winding 110.

The barrier 120 is a member disposed on both sides of the winding 110 and may be provided on the inside and the outside of the cylindrical winding 110 in a cylindrical shape.

The barrier 120 may function to isolate the winding 110 from the elements disposed adjacent to the winding 110.

The washer 130 is fixedly provided to the barrier 120 and may guide oil flowing between the barrier 120 and the barrier 120 disposed on both sides of the coil 110. [

The washer 130 may be comprised of a plate-like member that extends in the direction of the windings 110 in the barrier 120 and is disposed between the windings 110 and the windings 110 as shown in Fig. have.

The washer 130 may guide the oil at intervals between the windings 110 and the windings 110.

In one embodiment, the washer 130 may be alternately provided in each of the barriers 120 disposed on both sides so that the flow path of the oil flowing around the windings 110 is zigzag form.

That is, the washers 130 may be disposed at positions that are not symmetrical with respect to each other on the respective opposing sides of the barrier 120 disposed on both sides.

The flow loss reducing portion 140 may be formed in a rounded shape along the flow direction of the oil, not perpendicular to the corner portion where the washer 130 and the barrier 120 are connected.

As shown in FIG. 4, the flow loss reduction unit 140 may be formed by rounding a corner portion of a flow path through which oil flows, so that the flow direction of the oil can be changed easily.

Thus, when the oil flows smoothly at the corner portion, the flow velocity of the oil flowing around the winding 110 increases, so that the cooling performance of the winding 110 can be improved.

In one embodiment, the flow loss abatement portion 140 may be formed integrally with the washer 130. That is, the washer 130 and the flow loss reduction unit 140 may be integrally formed and installed in the barrier 120, but the present invention is not limited thereto. The flow loss reduction unit 140 and the washer 130 may be formed Or may be constructed as a detachable member.

Further, in one embodiment, the flow loss reduction section 140 is preferably formed to be curved at a radius of curvature in which the cross-sectional area of the oil flow path is maintained or expanded.

Since the gap between the barrier 120 and the windings 110 is limited although the flow direction of the oil can be changed more easily when the flow loss reducing part 140 is formed with an excessively large radius of curvature, Sectional area of the oil passage formed at the interval between the barrier 120 and the washer 130 may be reduced. That is, the flow loss reduction section 140 is too convex so that the interval between the corners and the corners of the windings 110 can be reduced.

In this case, a section where the cross-sectional area of the oil passage is narrowed may occur, which may interfere with the flow of the oil, thereby causing a problem that the flow rate of the oil decreases.

Therefore, it is preferable that the flow loss reducing section 140 is formed in a shape such that the cross-sectional area of the oil flow path can be maintained or expanded as described above.

The flow loss reduction section 140 may be configured such that the shortest distance from the edge of the winding 110 to the flow loss reduction section 140 is the shortest distance between the winding 110 and the barrier 120 or the washer 130. [ As shown in FIG.

Although the present invention has been shown and described with respect to specific embodiments thereof, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as set forth in the following claims And to change it.

100: Structure of winding part of inflow transformer
110: Winding
120: Barrier
130: Washer
140: Flow loss reduction section

Claims

A winding structure of an inflow transformer which includes a winding arranged at intervals and a barrier disposed on both sides of the winding, wherein oil flows around the winding and cools the winding,
A washer extending in the winding direction in the barrier and disposed between the winding and the winding, the washer for guiding oil to the gap between the winding and the winding; And
A flow loss reducing section that forms a corner portion where the washer and the barrier are connected to each other along a flow direction of the oil;
The winding structure of the input transformer.

The method according to claim 1,
Wherein the washer is alternately provided in the barrier disposed on both sides so that the flow path of the oil flowing around the winding is in a staggered configuration.

The method according to claim 1,
Wherein the flow loss reducing portion is formed integrally with the washer.

The method according to claim 1,
Wherein the flow loss reduction portion is formed such that the cross-sectional area of the oil flow path is curved at a curvature radius that is maintained or expanded.

5. The method of claim 4,
Wherein the flow loss reduction portion is formed such that the shortest distance from the corner portion of the winding to the flow loss reduction portion is equal to or longer than the shortest distance to the winding and the barrier or the washer.