KR101679340B1

KR101679340B1 - Oil immersed transformer

Info

Publication number: KR101679340B1
Application number: KR1020150076603A
Authority: KR
Inventors: 우상길
Original assignee: 현대중공업 주식회사
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2016-11-25

Abstract

An input transformer for cooling an insulating oil through a plurality of heat sinks is disclosed.
The disclosed inflow transformer includes an enclosure containing an insulating oil; A plurality of heat dissipation plates capable of flowing insulating oil therein and arranged in parallel; An upper header pipe provided at an upper end of the plurality of heat sinks to constitute a flow path for supplying an insulating oil to the plurality of heat sinks; A lower header pipe provided at a lower end of the plurality of heat radiating plates and through which the insulating oil flowing through the plurality of heat radiating plates flows; A supply passage connected between the outer casing and the upper header pipe to constitute a channel through which the insulating oil accommodated in the casing is supplied to the upper header pipe; And a return flow path connected between the enclosure and the lower header pipe to constitute a flow path for returning the insulating fluid flowing to the lower header pipe to the enclosure, wherein the supply flow path is connected between both ends of the upper header pipe .

Description

{OIL IMMERSED TRANSFORMER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input transformer, and more particularly, to an input transformer for cooling an insulation oil through a plurality of heat sinks.

Generally, an inflow transformer is a transformer having an iron core and a winding wire in an enclosure filled with insulating oil so that the insulating oil acts as a refrigerant or an insulator.

In such an inflow transformer, heat is generated by the loss of the winding, the iron core and the enclosure, and the generated heat is cooled by the convection phenomenon of the insulating oil filled in the enclosure.

FIG. 1 is a perspective view of a conventional inflowing transformer, and FIG. 2 is a cross-sectional view taken along line A-A 'of the inflowing transformer shown in FIG.

Referring to FIG. 1, the conventional inflowing transformer includes an enclosure 10 and a heat dissipation unit disposed outside the enclosure 10.

Here, the heat dissipating unit includes an upper header pipe 20 through which the insulating oil inside the enclosure 10 flows out to the heat dissipating unit, a lower header pipe 30 through which the insulating oil flowing into the heat dissipating unit flows into the enclosure 10, And a plurality of heat sinks 40 connected between the upper header pipe 20 and the lower header pipe 30.

As shown in FIG. 1, a plurality of assemblies including an upper header pipe 20, a lower header pipe 30, and a plurality of heat sinks 40 may be provided in parallel with the inflowing transformer.

In this inflowing transformer, the insulating oil stored in the enclosure 10 flows into the enclosure 10 after passing through the upper header pipe 20, the plurality of heat sinks 40 and the lower header pipe 30, It is possible to insulate and cool the iron core and the windings provided inside the enclosure 10 by flowing heat into the enclosure 10 in a state where the heat is released and the temperature is lowered.

The inflowing transformer having such a configuration has a higher cooling performance as the insulating oil is distributed to each of the plurality of heat dissipating plates 40 as evenly as possible.

However, in the conventional inflowing transformer, as shown in FIG. 2, the inlet and the outlet of the heat dissipating unit are biased to one side, and most of the insulating oil circulates through the heat dissipating plate 40 close to the inlet and the outlet.

As a result, a flow imbalance of the insulating oil occurs between the plurality of heat sinks 40, thereby lowering the cooling performance of the heat sink.

It is an object of the present invention to solve at least part of the problems of the prior art as described above, and as one aspect thereof, an object of the present invention is to provide an inflow transformer in which the flow imbalance of the insulating oil between a plurality of heat sinks is reduced.

According to an aspect of the present invention, A plurality of heat dissipation plates capable of flowing insulating oil therein and arranged in parallel; An upper header pipe provided at an upper end of the plurality of heat sinks to constitute a flow path for supplying an insulating oil to the plurality of heat sinks; A lower header pipe provided at a lower end of the plurality of heat radiating plates and through which the insulating oil flowing through the plurality of heat radiating plates flows; A supply passage connected between the outer casing and the upper header pipe to constitute a channel through which the insulating oil accommodated in the casing is supplied to the upper header pipe; And a return flow path connected between the enclosure and the lower header pipe and constituting a flow path for returning the insulating oil flowing in the lower header pipe to the enclosure, wherein the supply flow path is connected between both ends of the upper header pipe Lt; / RTI >

Here, the supply passage may be connected to the center of the upper header pipe in the longitudinal direction.

Preferably, the return flow path is connected to the center of the lower header pipe in the longitudinal direction.

In one embodiment, the supply passage and the return passage may be made of a steel pipe so as to support the heat dissipation module in which the heat dissipation plate, the upper header pipe, and the lower header pipe are assembled, to the enclosure.

Also, in one embodiment, a plurality of the heat dissipation modules are connected to the supply passage and the return passage, and the supply passage is connected to the center of the plurality of upper header pipes provided in each of the plurality of heat dissipation modules in the longitudinal direction And the return flow path may be connected to the center of the plurality of lower header pipes of the plurality of heat dissipation modules in the longitudinal direction.

According to the embodiment of the present invention having such a configuration, the cooling performance of the heat dissipation unit can be improved.

1 is a perspective view of a conventional inflow transformer.
2 is a cross-sectional view taken along the line A-A 'of the inflowing transformer shown in Fig. 1;
3 is a perspective view of an inflow transformer in accordance with an embodiment of the present invention.
4 is a cross-sectional view taken along the line B-B 'of the inflowing transformer shown in Fig. 3;
5 is a perspective view of an inflow transformer according to another embodiment of the present invention.
6 is a cross-sectional view taken along the line C-C 'of the inflow transformer shown in Fig. 5;
7 is a plan view of an input transformer according to another embodiment of the present invention.

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, an inflow transformer according to an embodiment of the present invention will be described.

3 and 4, an inflow transformer 100 according to an embodiment of the present invention includes an enclosure 10, a plurality of heat sinks 116, an upper header pipe 112, a lower header pipe 114, A supply passage 120, and a return passage 130. [0035]

The enclosure 10 is a tank-like structure in which elements necessary for transforming operation such as iron cores and windings can be installed therein.

Insulating oil can be accommodated in such an enclosure 10.

The heat dissipating plate 116 is configured to allow the insulating oil to flow therein, and may serve as a medium for discharging the heat of the insulating oil to the outside by exchanging heat between the insulating oil and the outside air.

In one embodiment, a plurality of heat sinks 116 may be arranged in parallel.

The upper header pipe 112 is provided at an upper end of the plurality of heat dissipating plates 116 to constitute a flow path for supplying the insulating oil to the plurality of heat dissipating plates 116.

The lower header pipe 114 may be provided at a lower end of the plurality of heat dissipating plates 116 to constitute a flow path through which the insulating oil passing through the plurality of heat dissipating plates 116 flows.

In one embodiment, the upper header pipe 112 and lower header pipe 114 may be disposed parallel to each other, but are not limited thereto.

The supply passage 120 is connected between the enclosure 10 and the upper header pipe 112 to constitute a flow path in which the insulating oil accommodated in the enclosure 10 is supplied to the upper header pipe 112.

The supply passage 120 may be connected between both ends of the upper header pipe 112. That is, the supply passage 120 is not connected to the opposite ends of the upper header pipe 112 but may be connected to the vicinity of the center of the upper header pipe 112.

In one embodiment, the supply passage 120 may be connected to the longitudinal center of the upper header pipe 112 as shown in FIGS.

The supply passage 120 is formed by assembling the heat dissipation module 110 in which the heat dissipation plate 116, the upper header pipe 112 and the lower header pipe 114 are assembled and assembled together with the return flow path 130 to be described later, The material of the supply passage 120 is not particularly limited and the material of the heat dissipation module 110 can be supported on the enclosure 10, It may be made of any material and shape having rigidity.

In one embodiment, a plurality of heat dissipation modules 110 may be arranged side by side on the side of the enclosure 10 as shown in FIG. At this time, the supply passage 120 may be provided to correspond to the plurality of heat dissipation modules 110 one to one as shown in FIG.

The return flow path 130 is connected between the enclosure 10 and the lower header pipe 114 and constitutes a flow path through which the insulating fluid flowing to the lower header pipe 114 returns to the enclosure 10.

The return flow path 130 may be connected between both ends of the lower header pipe 114. That is, the return flow path 130 is not connected to the opposite ends of the lower header pipe 114 but may be connected to the vicinity of the center of the upper header pipe 112.

In one embodiment, the return flow path 130 may be connected to the longitudinal center of the lower header pipe 114 as shown in FIGS.

The return flow path 130 may be formed of a steel pipe having high rigidity such that the heat dissipation module 110 can be supported on the enclosure 10 in a state of being spaced apart from the ground surface as the supply flow path 120, However, the material of the return flow path 130 is not particularly limited and may be any material and shape having rigidity that can support the heat dissipation module 110 on the enclosure 10.

In one embodiment, the return flow path 130 may be provided to correspond to the plurality of heat dissipation modules 110 on a one-to-one basis.

Next, a description will be made of an input transformer 100 according to another embodiment of the present invention, with reference to FIGS. 5 and 6. FIG.

5 and 6, the inflow transformer 100 according to another embodiment of the present invention includes a single supply path 120 connected to a plurality of heat dissipation modules 110, And a flow path 130.

5 and 6, a plurality of heat dissipation modules 110 may be provided in the inflow transformer 100 according to another embodiment of the present invention, The supply passage 120 and the return flow passage 130 may be connected to each other.

Here, the supply passage 120 may be connected to the center of the plurality of upper header pipes 112 provided in each of the plurality of heat dissipation modules 110, and the return flow path 130 may be provided in each of the plurality of heat dissipation modules 110 And a plurality of lower header pipes (114).

In this structure, the plurality of heat-dissipating modules 110 may be arranged in parallel to the outer side of the enclosure 10.

The inflow transformer 100 according to another embodiment of the present invention has a simple structure of the heat dissipating unit as compared with the inflow transformer 100 according to the embodiment of the present invention described above with reference to FIGS. 3 and 4, .

3 and 4, in the inflow transformer 100 according to the embodiment of the present invention, since the heat radiating plate 116 is disposed parallel to one surface of the enclosure 10, And is ventilated in a direction parallel to one surface of the housing 10.

5 and 6, the inflow transformer 100 according to another embodiment of the present invention has a structure in which the heat radiating plate 116 is vertically disposed on one side of the enclosure 10, Is ventilated in a direction perpendicular to one surface of the enclosure (10).

4 and 6, the inlet transformer 100 according to the embodiments of the present invention as described above is connected to the upper header pipe 112 (see FIG. 4) through the supply channel 120 connected to the center of the upper header pipe 112, So that the flow of the insulating oil in the upper header pipe 112 is shortened. As a result, the flow unbalance of the insulating oil to the plurality of heat sinks 116 is advantageously reduced.

In the insulating fluid flow structure of the inflow transformer 100 according to the embodiments of the present invention, only the supply flow path 120 is connected to the center of the upper header pipe 112 and the return flow path 130 is connected to the lower header pipe 114 Even if the supply flow path 120 is connected to the center of the upper header pipe 112 because the discharge speed of the insulating oil in the heat sink 116 near the return flow path 130 is relatively fast, The flow rate of the dielectric fluid circulating between the heat sinks 116 may cause an unbalanced flow of the dielectric fluid.

Accordingly, in the inflow transformer 100 according to the embodiments of the present invention, the supply passage 120 is connected to the center of the upper header pipe 112 and the return flow passage 130 is connected to the lower header pipe 114 So that the dielectric oil flow imbalance to the plurality of heat sinks 116 can be reduced.

7 is a plan view of an input transformer 100 according to another embodiment of the present invention.

7, the inflow transformer 100 according to another embodiment of the present invention includes a supply path 120 and a return path 130, to which a plurality of heat dissipation modules 110 are coupled, The heat dissipation module 110 may be installed in parallel with a surface on which the heat dissipation module 110 is installed.

The inlet transformer 100 according to another embodiment of the present invention connects the enclosure 10 and the supply flow path 120 and connects the connection port 10 to the supply path 120 by supplying the insulating fluid stored in the enclosure 10 to the supply path 120. [ And may include a pipe 140.

Here, the connection pipe 140 may be symmetrically connected to both sides of the supply passage 120, but the present invention is not limited thereto. Only one connection pipe 140 may be connected to the center of the supply passage 120.

Although not shown, the connection pipe 140 may be connected to the return flow path 130 in a symmetrical manner with respect to the supply flow path 120.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

100: Inflow transformer 10: Enclosure
110: heat dissipating module 112: upper header pipe
114: lower header pipe 116: heat sink
120: supply channel 130: return channel
140: connecting pipe

Claims

An enclosure housing the insulating oil;
A plurality of heat dissipation plates capable of flowing insulating oil therein and arranged in parallel;
An upper header pipe provided at an upper end of the plurality of heat sinks to constitute a flow path for supplying an insulating oil to the plurality of heat sinks;
A lower header pipe provided at a lower end of the plurality of heat radiating plates and through which the insulating oil flowing through the plurality of heat radiating plates flows;
A supply passage connected between the outer casing and the upper header pipe to constitute a channel through which the insulating oil accommodated in the casing is supplied to the upper header pipe; And
And a return flow path connected between the outer case and the lower header pipe to constitute a flow path for returning the insulating oil flowing in the lower header pipe to the outer case,
Wherein the supply passage is connected between both ends of the upper header pipe,
And the plurality of heat sinks are arranged at equal intervals in the upper header pipe and the lower header pipe.

The method according to claim 1,
And the supply passage is connected to the center of the upper header pipe in the longitudinal direction.

The method according to claim 1,
And the return flow path is connected to the center in the longitudinal direction of the lower header pipe.

The method according to claim 1,
Wherein the supply passage and the return passage are made of a steel pipe to support the heat dissipation module in which the heat dissipation plate, the upper header pipe, and the lower header pipe are assembled, to the enclosure.

5. The method of claim 4,
A plurality of the heat dissipation modules are connected to the supply passage and the return passage,
Wherein the supply passage is connected to a center of a plurality of upper header pipes provided in each of the plurality of heat dissipation modules,
Wherein the return flow path is connected to a center of the plurality of lower header pipes provided in each of the plurality of heat dissipation modules in the longitudinal direction.