KR101529422B1 - Cooling device for generator stator maintenance - Google Patents

Cooling device for generator stator maintenance Download PDF

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Publication number
KR101529422B1
KR101529422B1 KR1020140001165A KR20140001165A KR101529422B1 KR 101529422 B1 KR101529422 B1 KR 101529422B1 KR 1020140001165 A KR1020140001165 A KR 1020140001165A KR 20140001165 A KR20140001165 A KR 20140001165A KR 101529422 B1 KR101529422 B1 KR 101529422B1
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KR
South Korea
Prior art keywords
cooling
cooling block
block
water
cooling water
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KR1020140001165A
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Korean (ko)
Inventor
김태영
최정석
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한전케이피에스 주식회사
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Priority to KR1020140001165A priority Critical patent/KR101529422B1/en
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Publication of KR101529422B1 publication Critical patent/KR101529422B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The present invention relates to a cooling apparatus for main generator stator winding maintenance capable of preventing a harmful influence such as deformation due to thermal damage to a Teflon hose or the like by preventing a temperature of a surrounding structure from rising when brazing a solder molten part in stator winding maintenance. To achieve the objective of the present invention, a water clip (2) is connected with one end of a plurality of wires (1) for forming winding, and a Teflon hose (4) for supplying water is connected with one side of the water clip (2) through a seamed pipe (3). The cooling apparatus comprises a first cooling block (10) and a second cooling block (20) installed on both sides based on a connection part of the Teflon hose (4) and the seamed pipe (3). In the first cooling block (10) and the second cooling block (20), each two thereof form a paired symmetrical structure, and semicircular mounting grooves (11, 21) are formed to mount the seamed pipe (3) and the Teflon hose (4) on both sides. Inside the first cooling block (10) and the second cooling block (20), cooling water distribution holes (12, 22) which can distribute cooling water are formed. In one side of the first cooling block (10) and the second cooling block (20), cooling water supply hoses (13, 23) and cooling water discharge hoses (14,24) for supplying and discharging cooling water to the cooling water distribution holes (12, 22) are connected respectively and formed.

Description

{COOLING DEVICE FOR GENERATOR STATOR MAINTENANCE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling apparatus for a main generator stator winding fixture, and more particularly, to a cooling apparatus for shutting off a temperature rise so as to stably remove or install a Teflon hose in a stator winding maintenance process.

Generally, a generator uses an electromagnetic induction action to convert mechanical energy into electric energy, and uses a principle that a conductor generates electric power when rotating in a magnetic field.

These generators are completely enclosed to prevent entry of dust and moisture and to prevent leakage of hydrogen gas. Hydrogen gas and water are used as cooling medium.

The ventilation inside the generator is a closed circulation system by a fan attached to the rotor shaft, and a cooler is incorporated to cool the hydrogen gas. In addition, both ends of the stator are equipped with rotor bearings and shaft sealing facilities.

Here, the stator is roughly divided into a frame for supporting the stator, a stator core, and a stator winding. The stator winding is connected to the magnetic flux generated in the rotor, It acts as a channel.

These stator windings are classified into indirect cooling methods in which cooling is usually performed by air or hydrogen depending on the capacity, and direct cooling methods in which gases or liquids are directly passed through the windings to cool them.

The strands forming the windings are each insulated, in order to prevent loss due to the surrounding electrons, and are divided into two or four rows to form a plurality of layers.

A potential is used which converts the position of the wire forming each winding up, down, left and right along its length in the slot area.

In the case of a water-cooled winding, a water clip for collecting the cooling water flowing to each elementary wire is assembled at the end of the winding.

FIG. 1 is a schematic view showing a general stator winding connecting portion. A water clip 2 is formed at one end of a plurality of strands 1 forming a winding. A Teflon hose 4 for supplying cooling water is provided at one side of the water clip 2 And it is confirmed that the structure is connected by the joint pipe (3).

In order to check the integrity of the main generator stator winding, a water clip endoscopic inspection is performed. For this purpose, the soldering at the joint portion between the joint pipe 3 and the Teflon hose 4 is melted and separated.

That is, as shown in FIG. 2, since the joint pipe 3 and the Teflon hose 4 are connected to each other through a brazing operation, the brazing part is heated to a high temperature by using a separate brazing device.

However, in such a heating process, a temperature rise (700 to 800 ° C) is generated, and heat of high temperature is transferred to the peripheral Teflon hose 4 and the water clip 2, .

The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and it is possible to prevent the adverse effect on the Teflon hose or the water clip by simultaneously cooling the periphery of the cut portion during the heat separation of the Teflon hose connection portion for maintenance of the stator winding There is a purpose.

In order to accomplish the above object, the present invention provides a method of manufacturing a stator for a stator, comprising the steps of: forming a water clip on one end of a plurality of strands forming a winding, and connecting a Teflon hose for supplying cooling water to the one side of the water clip, In the cooling device, the cooling device comprises a first cooling block and a second cooling block, which are installed on both sides of the connecting portion of the Teflon hose and the coupling pipe, respectively; A semicircular seating groove is formed on both sides of the first cooling block and the second cooling block so that a joint pipe and a Teflon hose can be seated; A cooling water flow hole through which cooling water can flow is formed in the first cooling block and the second cooling block; And a cooling water supply hose and a cooling water discharge hose are connected to one side of the first cooling block and the second cooling block, respectively, for supplying and discharging cooling water to and from the cooling water circulation hole.

The cooling device of the present invention prevents the temperature of the surrounding structure from rising during the brazing operation of the welding melted portion in the stator winding maintenance process, thereby preventing adverse influences such as deformation due to thermal damage of the Teflon hose.

1 is a schematic structural view of a cooling water supply connection portion of a stator winding in general;
2 is a detailed structural view of a solder connection portion between a Teflon hose and a joint pipe.
3 is a perspective view of a cooling device according to one embodiment of the present invention.
4 is a side view of a cooling device according to an embodiment of the present invention;
Fig. 5 is a state in which the cooling device is installed according to the present invention. Fig.
Fig. 6 is a view showing a state after the installation of the cooling apparatus of the present invention. Fig.
7 is a front view of a cooling device according to another embodiment of the present invention.
8 is a side view of a cooling device according to another embodiment of the present invention.

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

3 and 4, the stator winding cooling apparatus according to an embodiment of the present invention is installed on both sides of the connecting portion between the Teflon hose 4 and the joint pipe 3, The first cooling block 10 and the second cooling block 20 are symmetrically arranged in a pair so that two of the first cooling block 10 and the second cooling block 20 form a pair, Shaped seating grooves 11 and 21 are formed so that the joint pipe 3 and the Teflon hose 4 can be seated in the first cooling block 10 and the second cooling block 20, The cooling water circulation holes 12 and 22 are formed at one side of the first cooling block 10 and the second cooling block 20 to supply and discharge the cooling water to the cooling water circulation holes 12 and 22. [ The cooling water supply hoses 13 and 23 and the cooling water discharge hoses 14 and 24 are connected to each other.

The first and second cooling blocks 10 and 20 in this embodiment are made of a copper material having a high thermal conductivity and are manufactured to fit the outer diameter of the joint pipe 3 and the Teflon hose 4.

The operation and effect of using the cooling device having the above-described structure will be described with reference to FIGS. 5 and 6. FIG.

In order to separate the connection portion between the joint pipe 3 and the Teflon hose 4 for water clip endoscopy or stator winding replacement, which is one of the methods for confirming the integrity of the main generator stator winding, the first cooling block 10 and the second cooling block 20 on both sides of the connection portion.

At this time, since each of the first and second cooling blocks 10 and 20 has a two-piece split structure, two of the first and second cooling blocks 10 and 20 are connected to each other through the joint pipe 3 and the Teflon hose (4) tightly coupled to the outer diameter.

The cooling water supply hoses 13 and 23 and the cooling water discharge hoses 14 and 24 are connected to the inlet and outlet of the cooling water flow holes 12 and 22 of the first and second cooling blocks 10 and 20, Connect the cooling water supply hose (13, 23) to the water piping or connect the circulation pump.

Thereafter, the cooling water is supplied to check whether the cooling water circulates normally into the first and second cooling blocks 10 and 20, and then the operation is performed.

In other words, the joint pipe 3 and the Teflon hose 4 are separated from each other by making the brazing device 30 approach the welding part and melting the welded part in a non-contact manner while the cooling device is installed and the cooling water is circulated. The cooling effect of the first cooling block 10 and the second cooling block 20 on both sides of the region can prevent the occurrence of adverse effects due to the temperature rise of the peripheral components.

In addition, when the connecting portion brazing operation for connecting the Teflon hose 4 to the water clip 2 is completed after the completion of the maintenance work, the cooling device of the present invention is also operated to perform a stable inspection operation.

7 shows a cooling apparatus according to another embodiment of the present invention. In the first cooling block 10 and the second cooling block 20, a pair of structures hinge at one side of the hinge 15, The first cooling block 10 and the second cooling block 20 are provided with flanges 17 and 27 for fastening the bolts 17 and 27 to the opposite sides of the hinges 15 and 25, 16, 26).

With this structure, since the divided bodies of the first and second cooling blocks 10 and 20 divided by two are connected by the hinges 15 and 25, the movement and installation work can be easily performed And the bolts 17 and 27 can be fastened by using the flange portions 16 and 26, so that a more stable fastening state can be maintained.

8 is a perspective view of a cooling device according to another embodiment of the present invention. The first cooling block 10 and the second cooling block 20 are spaced apart from each other by a screw- And the gap between the first and second cooling blocks 10 and 20 is adjusted by spacing adjusting rods 18 and 28 ) Can be confirmed.

When the spacing bar 40 is formed, stable spacing between the first cooling block 10 and the second cooling block 20 can be maintained during the brazing process for melting the solder, It is possible to prevent the phenomenon that the tube 3 and the Teflon hose 4 are suddenly separated.

In addition, since the clearance between the first cooling block 10 and the second cooling block 20 can be adjusted by turning the gap maintaining rods 40 threadedly engaged with the gap adjusting members 18 and 28, It shows the advantage that the work can be done with the optimum gap adjustment according to the field situation.

1: Line 2: Water clip
3: Connecting pipe 4: Teflon hose
10: first cooling block 11, 21:
12,22: Cooling water distribution hole 13,23: Cooling water supply hose
14, 24: Cooling water discharge hose 20: Second cooling block
30: Brazing device

Claims (5)

A water clip 2 is connected to one end of a plurality of strands 1 forming a winding and a Teflon hose 4 for supplying cooling water is connected to one side of the water clip 2 via a stator 3, A cooling device for a Teflon hose connection of a winding,
The cooling device includes:
And a first cooling block 10 and a second cooling block 20 made of copper and installed on both sides of the connecting portion between the Teflon hose 4 and the coupling pipe 3;
The first cooling block 10 and the second cooling block 20 each have a symmetrical structure in which two pairs are formed and a semicircular seat Grooves 11 and 21 are formed;
In the first cooling block 10 and the second cooling block 20, cooling water flow holes 12 and 22 through which cooling water can flow are formed;
One side of the first cooling block 10 and the second cooling block 20 is provided with cooling water supply hoses 13 and 23 for supplying and discharging cooling water to and from the cooling water circulation holes 12 and 22 and cooling water discharge hoses 14 and 24 Are connected to each other;
The first cooling block 10 and the second cooling block 20 have a structure in which pairs of structures are connected to each other by hinges 15 and 25 at one side to be opened and closed;
Each of the first cooling block 10 and the second cooling block 20 has flange portions 16 and 26 for fastening bolts 17 and 27 opposite to the hinges 15 and 25,
The first cooling block 10 and the second cooling block 20 are connected to each other by a spacing rod 40 having a screw shape for keeping a certain interval therebetween and the first cooling block 10 and the second cooling block 20 are connected to each other. Wherein the spacing adjusting rods (18, 28) are screwed with the spacing rods (40) so that the spacing between the spacing rods (40) is adjustable. delete delete delete delete
KR1020140001165A 2014-01-06 2014-01-06 Cooling device for generator stator maintenance KR101529422B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140001165A KR101529422B1 (en) 2014-01-06 2014-01-06 Cooling device for generator stator maintenance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140001165A KR101529422B1 (en) 2014-01-06 2014-01-06 Cooling device for generator stator maintenance

Publications (1)

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KR101529422B1 true KR101529422B1 (en) 2015-06-17

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KR1020140001165A KR101529422B1 (en) 2014-01-06 2014-01-06 Cooling device for generator stator maintenance

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004209509A (en) * 2002-12-27 2004-07-29 Yamaha Corp Thermometer for metallic mold cooling water and metallic mold cooling system
KR100731490B1 (en) * 2006-02-03 2007-06-21 엘에스전선 주식회사 Welding assistance apparatus for conductor of cable
KR20090018484A (en) * 2007-08-17 2009-02-20 두산중공업 주식회사 Water clip being without a different kind metal brazing
KR100984225B1 (en) * 2010-06-10 2010-09-28 신영식 Portable resistance brazing machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004209509A (en) * 2002-12-27 2004-07-29 Yamaha Corp Thermometer for metallic mold cooling water and metallic mold cooling system
KR100731490B1 (en) * 2006-02-03 2007-06-21 엘에스전선 주식회사 Welding assistance apparatus for conductor of cable
KR20090018484A (en) * 2007-08-17 2009-02-20 두산중공업 주식회사 Water clip being without a different kind metal brazing
KR100984225B1 (en) * 2010-06-10 2010-09-28 신영식 Portable resistance brazing machine

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