JPH06215959A - Cooling structure for transformer winding - Google Patents

Abstract

PURPOSE:To obtain a downsized, lightweight cooling structure for transformer winding in which heat generated in the winding can be discharged efficiently through a thin heat pipe without sacrifice of the productivity of the winding. CONSTITUTION:In a transformer winding, winding body is constituted of a non-loop type thin heat pipe 31 produced by encapsulating a working liquid in a thin pipe container 13. A loop type thin heat pipe 32 formed into a predetermined loop by encapsulating a working liquid in a thin pipe container 14 is then brought into tight contact, at a predetermined part thereof, with the non- loop type thin heat pipe 31 at a predetermined part thereof thus constituting a heat receiving part. Other predetermined part of the loop type thin heat pipe 32 is employed as a heat dissipating part of the loop type thin heat pipe. A forced circulation type cooling pipe may be used in place of the loop type thin heat pipe 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer winding cooling structure suitable for reducing the size and weight of a transformer.

[0002]

2. Description of the Related Art In recent years, in response to an increase in the demand for electric power in urban areas, electric power equipment is often installed in urban areas. Of this type of electric power equipment, equipment installed in buildings and underground malls, especially large equipment such as transformers, is required to have flame retardancy, and therefore, as an insulating medium used for transformers, Conventional flammable mineral oil is being replaced with non-flammable gas and flame-retardant epoxy resin,
Further, application studies of materials having a solid-liquid intermediate state such as silicone gel have been conducted.

However, when these insulating media are used, the cooling performance is lower than that of the conventional oil-filled transformer that cools the device body by convectively circulating a liquid insulating and cooling medium. Therefore, it is necessary to take measures such as reducing the current density of the windings, which tends to increase the size and weight of the device.

On the other hand, in an urban area, land price is high and the transformer is installed in a place where the carry-in restrictions are severe, so downsizing and weight reduction of the transformer are the top priorities. It is strongly desired to improve the cooling performance of the.

As a method for solving such a problem, many proposals regarding the use of a heat pipe have been made in the past. However, since there are various problems as described below, all of them are limited to a small capacity transformer or the like. The current situation is that it has been put to practical use only under the specified conditions.

(1) In order to uniformly cool the inside of the winding to a desired temperature, it is necessary to insert a large number of heat pipes.
On the other hand, in order to insert a large number of heat pipes without enlarging the size of the equipment, it is necessary to make the heat pipes thin. For example, in the case of a heat pipe with an outer diameter of about 3 mm, the heat dissipation part is about 500 mm. Is the operational limit,
It was difficult to make it longer than that.

(2) Further, when the heat pipe as described above is used, the heat transfer amount per wire is about 10 W, which is sufficient to cool the large transformer winding. It was very difficult to get.

(3) Further, when the heat pipe is inserted into the transformer winding, it is necessary to bend the heat pipe along the winding shape. However, this bending significantly reduces the heat transport capacity. There was a drawback that it would end up.

(4) Further, when the heat pipe is inserted into the transformer winding, it is necessary to operate in the top heat posture depending on the insertion position. In this top heat posture, the heat transport ability is significantly increased. There was a drawback that it would decrease.

By the way, recently, a loop type thin pipe heat pipe has been developed as a new type heat pipe that overcomes the above-mentioned drawbacks of the conventional heat pipe, and it is used as a cooling means for the transformer winding ( 64-6499
No. "Structure of electromagnetic equipment") has been proposed.

FIG. 34 shows the structure of the loop type thin tube heat pipe used in the above proposal. That is, the thin tube container 2 in which the working fluid is sealed is formed in a meandering shape to form a heat receiving portion 2-H (heat receiving portion group H) and a heat radiating portion 2-C (heat radiating portion group C).
In the thin tube container 2, the working liquid in which the liquid portion 4 and the gas portion 5 are distributed is strongly circulated in a predetermined direction by the circulation direction restricting means 3 in which a loop-shaped endless flow path having alternating flow paths is formed. In addition, the structure is such that heat is transported while repeating evaporation and condensation.

According to this loop type thin tube heat pipe,
Not only can it be made into a thin tube with an outer diameter of about 2 mm, but its length can be extended without restriction. Even if it is used in the top heat posture, it is almost the same as when it is used in the bottom heat posture. It exhibits the same heat transport characteristics. And when applying this loop type thin pipe heat pipe as a cooling means of a transformer winding, it is proposed by the following structures.

The loop type thin tube heat pipe is composed of a loop in which a thin tube container is meandered, and a group of predetermined portions of its turn is mounted as a heat receiving group at a predetermined temperature rising portion of a device such as a transformer. As shown in FIG. 35, the mounting state is such that the heat receiving portion 2-H of the loop type thin pipe heat pipe is wound around the winding 1
36, or the heat receiving part 2-H of the loop type thin pipe heat pipe itself is used also as a winding conductor, as shown in FIG. Of any of the above-mentioned configurations or a combination of these configurations. In addition, 6 is an iron core, and the remaining group of each turn of the loop type thin tube heat pipe is configured as a heat radiating portion of a predetermined heat radiating structure.

[0014]

By the way, the important points to note here are: (a) loop type thin tube heat pipe for a desired heat transport amount as a condition for effectively operating this loop type thin tube heat pipe. It is necessary to distribute the heat receiving portion and the heat radiating portion at an appropriate ratio in the pipe. (B) The loop type thin pipe heat pipe requires the circulation direction regulating means (valve body) 3. That is, in any of the configurations shown in FIGS. 35 and 36, if the heat receiving portion 2-H at one location becomes too long, that portion will not operate normally and overheating will occur.
Therefore, the larger the capacity of the winding, the more the number of heat dissipation portions to be drawn out from the middle of the winding. Therefore, in the case of considering a generally-used method for manufacturing a winding in which a conductor is continuously wound by rotating a winding core, there is a problem that the manufacturing efficiency is significantly reduced.

Further, since it is necessary to mount a plurality of valve bodies 3 in one loop, the work for mounting the valve bodies 3 is interrupted. Therefore, the manufacturing efficiency is the same as described above. Will be lowered.

Incidentally, in the seminar held in '91 -3-15 entitled "Recent Heat Pipe Application Technology",
Newly introduced are "loop type thin tube heat pipe without using valve element" and "non-loop type thin tube heat pipe".

Here, the "loop type thin pipe heat pipe without using a valve body" has a structure as shown in FIG. 37, and transports heat by axial vibration of the working fluid and a gentle circulating flow. is there. This loop type thin tube heat pipe is
Since there is no circulation direction regulating means (valve body), basically it becomes difficult to operate in the top heat posture.

As shown in FIG. 38, the "non-loop type thin pipe heat pipe" is a thin pipe container 2 in which a working fluid is enclosed and both ends thereof are sealed off. The group of loops is configured as the heat receiving section group H, and the other loop group is configured as the heat radiation section group C. And FIG.
As shown in, heat is transported in the direction of arrow 9 only by the axial vibration (arrow 8) of the working liquid generated by evaporation / condensation of the working liquid by nucleate boiling 7. This non-loop type thin tube heat pipe has a structure in which an appropriate amount of working fluid is simply sealed in the thin tube container 2 and has no connecting portion for forming a loop, so that the installation work at the time of application is easy. , The heat transport capacity is inferior.

As described above, "loop type thin tube heat pipe without using a valve element" and "non-loop type thin tube heat pipe"
Both are inferior in characteristics to the loop type thin tube heat pipe with a valve element, and do not solve the above problem (a).

Therefore, the object of the present invention is to efficiently dissipate the heat generated in the winding by utilizing the characteristics of the thin tube heat pipe without deteriorating the manufacturability of the winding. It is an object of the present invention to provide a cooling structure for a transformer winding, which can be made compact and lightweight.

[0021]

According to the present invention, there is provided a cooling structure for a transformer winding, wherein the winding body is a non-loop type thin tube heat pipe in which a working fluid is enclosed in a hollow tubular tube container. On the other hand, heat is received by closely adhering a predetermined portion of the loop-type thin tube heat pipe to a predetermined portion of the non-loop-type thin tube heat pipe in which a working fluid is enclosed in a hollow tubular thin tube container to form a loop of a predetermined shape. The structure is characterized in that the remaining part of the loop type thin tube heat pipe is used as a heat radiating part of the loop type thin tube heat pipe.

In this case, a forced circulation type cooling pipe may be used in place of the loop type thin pipe heat pipe. In addition, in this configuration, it is also conceivable to provide a plurality of hydraulic fluid sealing passages inside the thin tube container of the non-loop type thin tube heat pipe. Furthermore, the plurality of hydraulic fluid sealing passages may be formed in a spiral shape that does not intersect.

On the other hand, a loop type having a loop-shaped hydraulic fluid sealing passage is provided by providing two hydraulic fluid sealing passages inside the thin tube container and connecting these two hydraulic fluid sealing passages at both ends thereof. Make up a thin tube heat pipe,
This loop type thin tube heat pipe can be used instead of the non-loop type thin tube heat pipe in the above-described transformer winding cooling structure.

In this case, it is conceivable that the loop type thin pipe heat pipe is provided with n (n is an integer of 2 or more) loop-shaped hydraulic fluid filled passages.

[0025]

In the transformer winding constructed as described above, when forming the winding body, since the thin tube container which finally constitutes the non-loop type thin tube heat pipe is used, it is also necessary to form the loop. Since there is no need to pull out the electric wire from the middle of the winding to form the heat radiating portion, and further, it is not necessary to attach the valve body, it is possible to maintain the winding manufacturing efficiency which is no different from the conventional winding process.

On the other hand, for the heat radiating portion which needs to be appropriately dispersed in order to operate the winding body as a non-loop type thin tube heat pipe, a predetermined portion of the separately provided loop type thin tube heat pipe or cooling pipe is desired. It can be easily formed by closely fitting the position.

Then, the heat generated in the winding is transported to the heat radiating section (the heat receiving section of the loop type thin tube heat pipe or the cooling pipe) by the axial vibration of the working fluid enclosed in the non-loop type thin tube heat pipe, Further, the heat is transported to the outside of the winding body by the axial vibration of the working fluid of the loop type thin pipe heat pipe and the circulating flow or the cooling medium of the cooling pipe,
Heat is dissipated through the heat dissipating part of the loop type thin pipe heat pipe or the external heat exchanger of the cooling pipe.

Further, since the plurality of working liquid sealing passages are provided inside the thin tube container of the non-loop type thin tube heat pipe, the heat transporting capability of the thin tube container, that is, the non-loop type thin tube heat pipe is enhanced. Therefore, since the current density of the winding can be increased, a conductor having a small cross-sectional area can be used with the same rating, and the winding can be miniaturized.

Further, if the plurality of hydraulic fluid enclosing passages are formed in a spiral shape that does not intersect, the position distribution of the hydraulic fluid enclosing passages inside the thin tube container becomes uniform, and the non-loop type thin tube heat pipe is used. Because the amount of heat collection increases,
The heat transport capacity is even higher.

Further, by providing two hydraulic fluid sealing passages inside the thin tube container and connecting these two hydraulic fluid sealing passages to each other at both ends thereof, a loop type having a loop-shaped hydraulic fluid sealing passage. Make up a thin tube heat pipe,
If this loop type thin pipe heat pipe is used in place of the non-loop type thin pipe heat pipe in the cooling structure of the transformer winding described above, heat transfer is performed by the gentle circulation flow in addition to the axial vibration of the working fluid. As it is carried out, the heat transport capacity is further improved.

Further, if n (n is an integer of 2 or more) loop-shaped hydraulic fluid filled passages are provided inside the loop type thin pipe heat pipe, the heat transport capacity can be remarkably improved. it can.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The transformer is usually composed of two windings, a low-voltage winding and a high-voltage winding, but in the following description, an example of one winding will be described as a representative.

FIG. 1 is a perspective view showing the overall structure of the cylindrical winding, and FIG. 2 is a partial cross section thereof. As shown in FIG. 1 and FIG. 2, a thin tube container 13 formed as a hollow tubular electrically insulated conductor is placed on an insulating tube 10 at a winding start portion 13 thereof.
The winding body is constructed by concentrically winding from a to the winding end portion 13b. In this example, the winding main body is composed of a total of 5 layers from the innermost side to the outermost side, and every time one layer is wound up, another hollow tubular capillary tube container 14 is closely attached and attached to both ends thereof, The end support member 11 is attached to the outer side in the axial direction. Such winding layers are sequentially formed up to the fifth layer. A predetermined gap may be provided between the layers by inserting the spacing piece 12 for the purpose of improving insulation or cooling.

Then, the winding start portion 13 of the thin tube container 13
The winding body itself is configured as a non-loop type thin tube heat pipe 31 by enclosing a predetermined amount of hydraulic fluid from a or the winding end portion 13b, and a lead conductor (not shown) is connected. Pure water, a fluorinated liquid, or the like is usually used as the working liquid.

On the other hand, the thin tube container 14 is connected to form a loop with a predetermined heat dissipating structure (not shown), for example, a hollow tubular thin tube container which is formed in a meandering shape and is arranged outside the transformer container, and then a predetermined amount of operation is performed. The liquid is sealed to form the loop type thin tube heat pipe 32.

The cross-sectional shape of the thin tube containers 13 and 14 is, for example, as shown in FIGS. 3 (a) and 3 (b), and is a round shape having low electric resistance and high thermal conductivity, such as copper or aluminum. Alternatively, an insulating layer 17 made of a material having high thermal conductivity is provided on the rectangular hollow conductor 15 or 16. The hollow tubular capillaries 13 and 14 are mounted in such a manner that the wedge portion of the joint is coated with a heat conductive grease or resin 18 as shown in FIGS. 4 (a) to 4 (c), for example. To do.

With such a structure, since the thin tube container 13 forming the non-loop type thin tube heat pipe 31 is used in forming the winding body, the winding is performed in the same manner as a normal winding conductor. Since it is possible to perform work, it is not necessary to form a loop in the thin tube container 13, it is not necessary to pull out a conductor from the middle of the winding body to form a heat dissipation portion, and further, it is not necessary to attach a valve body. The manufacturing efficiency that is no different from the conventional winding process can be maintained. Moreover, there is no problem in terms of insulation between the winding of the thin tube container 13 and the presence of the insulating layer 17.

On the other hand, in the thin tube container 13 of the non-loop type thin tube heat pipe 31 which constitutes the winding body, it is necessary to disperse and dissipate the heat radiating portions appropriately, but these heat radiating portions are manufactured separately. The thin tube containers 14 of the loop thin tube heat pipe 32 can be dispersed and provided by being closely attached. This closely attached portion also serves as a heat receiving portion of the loop type thin tube heat pipe 32.

Therefore, the heat generated in the winding body due to the energization is first caused by the operation of the non-loop type thin tube heat pipe 31, that is, the axial vibration of the working liquid enclosed in the thin tube container 13 to radiate the heat (the loop type thin tube). It is transported toward the heat receiving part of the heat pipe 32). And thin tube container 1
Since heat conductive grease or resin is applied to the joints of 3 and 14 so that they are in close contact with each other, the heat resistance at the joints is minimized and the heat is conducted. (2), that is, due to the axial vibration and circulating flow of the working fluid enclosed in the thin tube container 14, it is transported to the outside of the winding body and radiated to the outside through a predetermined heat radiating portion.

As described above, since the cooling system directly collects heat from the winding body and dissipates the heat from the heat collecting section to the outside, excellent cooling performance can be obtained even when gas insulation or solid insulation is applied. To be Also, heat can be directly dissipated to the outside via a heat pipe with extremely small thermal resistance, and since the winding body itself is composed of a heat pipe, the internal temperature distribution can be made uniform compared to conventional windings. The winding body can be made compact and lightweight.

In the above embodiment, the thin tube container 14 constituting the loop type thin tube heat pipe 32 is set to the ground potential for connecting to the external heat radiating portion, whereas the non-loop type thin tube heat forming the winding body is formed. Since the thin tube container 13 of the pipe 31 has an electric potential according to the winding conductor, the voltage sharing of the closely-attached parts of both becomes large. Therefore, when applied to high-voltage equipment, a round or square hollow pipe made of an insulating material having excellent thermal conductivity, preferably flexible, for example, a highly airtight resin, is partially or Try to use it for everything.

FIGS. 5 and 6 show a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals, and different points will be described. In the second embodiment, as shown in FIGS. 5 and 6, the loop-type thin tube heat pipe 3 is provided on each layer, innermost peripheral surface, and outermost peripheral surface of the winding body.
The thin tube container 14 which constitutes No. 2 is closely attached. According to such a configuration, the heat radiation portion is present in each turn of the thin tube container 13 of the non-loop type thin tube heat pipe 31 that constitutes the winding body, so that the temperature distribution inside the winding body is more uniform. Can be realized. Further, in FIGS. 5 and 6, the amount of heat radiation can be arbitrarily set by increasing the number of thin tube containers 14 of the loop-type thin tube heat pipe 32 inserted between the layers.

7 and 8 show a third embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and different points will be described. In the third embodiment, as shown in FIGS. 7 and 8, a winding formed by stacking disk-shaped winding units having a predetermined number of layers in the vertical direction with a spacing piece 20 interposed therebetween. At the outermost peripheral portion of each layer, a thin tube container 14 forming a loop thin tube heat pipe 32
Is closely attached.

According to this structure, since the thin tube container 14 can be mounted in a completely independent form after the winding body is formed, the assembling property is excellent, and the non-loop type thin tube heat pipe 31 constituting the winding body is formed. Since the heat radiating portion can be provided for each small turn of the thin tube container 13, the temperature distribution inside the winding body can be made more uniform. Further, in the above-mentioned embodiment, the thin tube container 14 is mounted at one place in two layers, but it can be mounted at any ratio depending on the design conditions.

9 and 10 show a fourth embodiment of the present invention. The same parts as those of the third embodiment are designated by the same reference numerals and different points will be described. In the fourth embodiment, as shown in FIG. 9 and FIG. 10, the thin tube container 14 that forms the loop thin tube heat pipe 32 also serves as the spacing piece 20 at a predetermined position between the layers of the disk-shaped winding unit. Are closely attached.

According to such a structure, the thin tube container 1 of the non-loop type thin tube heat pipe 31 which constitutes the winding main body.
Since the heat dissipating portion can be provided for each smaller number of turns of 3, the temperature distribution inside the winding body can be made more uniform. In addition, the amount of heat radiation can be set arbitrarily by increasing the number of places where the thin tube container 14 is mounted between the layers.

A forced circulation cooling system may be adopted in place of the loop type thin pipe heat pipe 32 in each of the above embodiments. That is, the loop-type thin tube heat pipe 32
In place of the thin tube container 14 constituting the above, a metal or insulating cooling pipe in which a cooling medium such as pure water or a fluorinated liquid is enclosed is used. The non-loop type thin tube heat is provided by bringing the heat exchanger arranged outside the transformer into communication with the forced circulation pump in the remaining predetermined portion in close contact with the thin tube container 13, and by forcibly circulating the cooling medium in the cooling pipe. The heat of the winding body composed of the pipe 31 can be smoothly radiated to the outside.

11 to 15 show a fifth embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and different points will be described. First, as shown in FIGS. 11 to 13, inside the thin tube container 41 of the non-loop type thin tube heat pipe 31 constituting the winding body, a plurality of, for example, two working fluid sealing passages 42, 42 are provided. It is provided in parallel. Each hydraulic fluid sealing passage 42, 42
A predetermined amount of a working fluid such as pure water or a fluorine-containing liquid is enclosed therein. Further, the thin tube container 41 is configured by providing the insulating layer 17 on the outer peripheral surface of the hollow conductor 16 having the two working fluid sealing passages 42, 42.

A cooling pipe 43 is provided in place of the thin tube container 14 of the loop thin tube heat pipe 32. Since this cooling pipe 43 needs to be connected to a predetermined external heat exchanger (not shown) and usually has a ground potential, it is necessary to consider insulation. Above cooling pipe 4
No. 3 has a cross-sectional shape as shown in FIG. 14, and needs to be made of a material having good thermal conductivity and flexibility. In this case, the insulating property made of highly airtight resin 44 is used. The pipes are used in part or in whole.

An external heat exchanger and a refrigerant circulation pump (not shown) are connected to the cooling pipe 43 so as to form a loop. In this case, the cooling pipe 43
Is configured as a heat receiving portion of the refrigerant circulation heat exchanger system. An insulating liquid such as a fluorinated liquid is used as the circulating refrigerant sealed in the loop, that is, in the cooling pipe 43. If such an insulating liquid is used, even if the refrigerant leaks, it does not hinder the insulation of the winding wire.

When the thin tube container 41 of the non-loop type thin tube heat pipe 31 and the cooling pipe 43 are closely attached, as shown in FIG. 15, grease or resin 18 having good thermal conductivity is attached to the joint surface between them. It is desirable to adopt a coating structure.

According to the configuration of the above fifth embodiment, it is possible to obtain substantially the same effect as that of the first embodiment. That is, when forming the winding main body, it is not necessary to form a loop and it is not necessary to attach a valve body, so that it is possible to maintain the manufacturing efficiency which is no different from the conventional winding process, and the insulating structure is also provided. The optimal configuration can be achieved.

Further, in the fifth embodiment described above, the heat generated in the winding due to the energization is cooled by the heat transport action of the two working liquid sealing passages 42 of the thin tube container 41 of the non-loop type thin tube heat pipe 31. It is transported to the pipe 43 side. Specifically, due to the axial vibration of the working fluid sealed in the two working fluid sealing passages 42 of the thin tube container 41, the heat is closely attached to the cooling pipe 43 (refrigerant circulation heat exchanger). It is transported to the heat receiving part of the system).

Then, here, the heat is applied to the cooling pipe 43.
It is transmitted to the internal refrigerant, is transported to the outside of the winding by the circulating flow of the refrigerant, and is radiated to the outside through a predetermined external heat exchanger. At this time, since the two working fluid sealing passages 42 are provided in the thin tube container 41, the heat-transporting capacity of the non-loop type thin tube heat pipe 31 is higher than that of the one having only one working fluid sealing passage. It almost doubles. Therefore, since the heat transport capacity is increased, the current density in the winding can be increased accordingly. As a result, a conductor having a smaller cross-sectional area can be used with the same rating, and the winding structure can be made smaller accordingly.

In the fifth embodiment, the thin tube container 41 is used.
As shown in FIG.
However, the present invention is not limited to this, and may be configured as shown in FIG. 16 or FIG.
Further, three or more hydraulic fluid sealing passages 4 are provided in the thin tube container 41.
2 may be provided as shown in FIG. 18 or FIG.
In this case, the heat transport capacity of the thin tube container 41 is increased by the number of the hydraulic fluid sealing passages 42.

Here, since the size of the cross-sectional area of one hydraulic fluid enclosing passage 42 has almost no effect on the heat transporting ability, in order to reduce the outer diameter of the conductor, the hydraulic fluid enclosing passage 4 is required.
It is preferable to set the cross-sectional area B per 1 of 2 so as to meet the condition of the following equation.

B <A / (n-1) where A is the cross-sectional area of the conductor including the hydraulic fluid sealing passage, n is the number of hydraulic fluid sealing passages, and the sectional shape of the cooling pipe 43 is shown in FIG. It may be configured in such a circular shape. In this case, when the cooling pipe 43 having a circular cross section and the thin tube container 41 having a rectangular cross section are closely attached, as shown in FIG.
The joint surface on the 3 side is slightly deformed so as to be closely attached via the resin 18.

When the thin tube containers 41 having a circular cross section are closely attached to each other, as shown in FIG. 22, the two are brought into contact with each other and the resin 1 is provided between the surfaces of the two close to each other.
It is filled up with 8 and made to adhere.

23 and 24 show a sixth embodiment of the present invention. The same parts as those in the fifth embodiment are designated by the same reference numerals, and different points will be described. 23 and 24
As shown in FIG. 2, the two hydraulic fluid enclosing passages 45, which replace the two hydraulic fluid enclosing passages 42, are formed in a spiral shape that does not intersect each other, and each is a “non-loop type thin tube heat pipe”.

By the way, when a plurality of hydraulic fluid sealing passages are provided in parallel with each other, there is a temperature gradient between the hydraulic fluid sealing passage and a portion distant from the hydraulic fluid sealing passage (the portion indicated by symbol A in FIG. 23). Occurs. This temperature gradient increases as the cross-sectional area of the thin tube container 41 increases and as the number of hydraulic fluid sealing passages decreases, thus pushing up the maximum temperature of the winding.

On the other hand, in the sixth embodiment, 2
Since the individual hydraulic fluid sealing passages 45 are formed in a spiral shape that does not intersect, the position distribution of the hydraulic fluid sealing passages 45 inside the thin tube container 41 becomes uniform, and the temperature gradient in the thin tube container 41 can be reduced. Therefore, the thin tube container 4
1, that is, the heat collection amount of the non-loop type thin tube heat pipe is increased, and more efficient heat transport can be performed.

25 to 27 show the seventh embodiment of the present invention. The same parts as those of the fifth embodiment are designated by the same reference numerals and different points will be described. 25 and 2
As shown in FIG. 6, two working liquid sealing passages 46 are provided in parallel inside the thin tube container 41, and at both end portions (winding start portion and winding end portion) of the thin tube container 41. Is provided with a groove portion 47 that connects the two hydraulic fluid sealing passages 46 to communicate with each other.

In this case, as shown in FIG. 27, after closing the groove portion 47 at one end of the thin tube container 41 with the lid member 48 and the brazing 49, the working fluid is injected into the working fluid sealing passage 46, Further, similarly to the configuration shown in FIG. 27, the groove 47 at the other end of the thin tube container 41 is sealed by the lid member 48 and the brazing 49, and thus the working fluid is sealed. As a result, the two hydraulic fluid sealing passages 46 are connected at both ends, and both hydraulic fluids can exchange with each other.
A loop-shaped hydraulic fluid sealing passage is formed. In this case, the thin tube container 41 constitutes a loop type thin tube heat pipe 50 that does not use a valve element. According to the loop type thin pipe heat pipe 50, heat is transported by the gentle circulation flow in addition to the axial vibration of the working fluid, so that the heat transport capability can be further improved.

28 to 30 show the eighth embodiment of the present invention. The same parts as those of the seventh embodiment are designated by the same reference numerals, and different points will be described. As shown in FIG. 28 to FIG. 30, four working fluid sealing passages 51 are provided in parallel inside the thin tube container 41, and both ends (winding start portion and winding end portion) of the thin tube container 41 are provided. In the end face portion of the above, two groove portions 52 are provided to connect two of the four hydraulic fluid enclosing passages 51 to each other so as to communicate with each other. In this case, FIG. 29 shows the end face on the left side in FIG. 28, and FIG. 30 shows the end face on the right side in FIG.

In the eighth embodiment, two loop-shaped hydraulic fluid sealing passages are formed by connecting two of the four hydraulic fluid sealing passages 51 to each other so as to communicate with each other. There is. In this case, the two loop-shaped hydraulic fluid sealing passages respectively constitute loop type thin pipe heat pipes that do not use a valve element. According to the seventh embodiment, since the two loop-shaped hydraulic fluid sealing passages are formed in the thin tube container 41, the heat transport capacity can be further improved.

31 to 33 show the ninth embodiment of the present invention. The same parts as those of the eighth embodiment are designated by the same reference numerals, and different points will be described. As shown in FIGS. 31 to 33, four working fluid sealing passages 51 are provided in parallel inside the thin tube container 41. And
As shown in FIG. 32, at the end face portion of one end (the left side in FIG. 31) of the thin tube container 41, four hydraulic fluid sealing passages 51 are provided.
32, two groove portions 53 are provided to connect the two on the left side and the two on the right side in FIG. In addition, as shown in FIG. 33, the other end (the right side in FIG. 31) of the thin tube container 41 is provided with two of the four hydraulic fluid sealing passages 51 on the upper side and the lower side in FIG. Two groove portions 54 are provided for connecting the two and communicating with each other.

As a result, in the ninth embodiment, four hydraulic fluid sealing passages 51 are continuously connected to one loop to form one long loop-shaped hydraulic fluid sealing passage. It is composed. In this case, the one long loop-shaped hydraulic fluid sealing passage constitutes a loop-type thin tube heat pipe that does not use a valve body. Therefore, also in the ninth embodiment, it is possible to obtain substantially the same operational effects as in the eighth embodiment.

[0068]

Since the present invention is as described above, the following effects can be obtained.

In the transformer winding cooling structure according to the first aspect of the present invention, the winding main body is constituted by the non-loop type thin tube heat pipe in which the working liquid is enclosed in the hollow tubular thin tube container, while the hollow tubular thin tube container is formed. The loop type thin tube heat pipe is formed by closely adhering a predetermined portion of the loop type thin tube heat pipe in which a working fluid is enclosed in a loop to a predetermined shape to the predetermined portion of the non-loop type thin tube heat pipe. Since the remaining predetermined part of the pipe is used as the heat dissipation part of the loop type thin tube heat pipe, the heat generated in the winding body is not affected by the characteristics of the non-loop type thin tube heat pipe without impairing the winding workability. It can be used to efficiently radiate heat, and can be made compact and lightweight.

In the cooling structure for the transformer winding according to the second aspect, a forced circulation type cooling pipe is used instead of the loop type thin pipe heat pipe according to the first aspect. Therefore, the configuration according to the first aspect. It is possible to obtain almost the same effect as.

In the transformer winding cooling structure according to the third aspect of the present invention, since a plurality of hydraulic fluid sealing passages are provided inside the thin tube container of the non-loop type thin tube heat pipe,
By improving the heat transport capacity of the thin tube container, that is, the non-loop type thin tube heat pipe, and increasing the current density of the winding by that amount, the winding structure can be made smaller.

In the transformer winding cooling structure according to the present invention, since the plurality of hydraulic fluid sealing passages are formed in a spiral shape that does not intersect with each other, the position distribution of the hydraulic fluid sealing passages inside the thin tube container. Becomes uniform and the amount of heat collected by the non-loop type thin tube heat pipe increases, so that the heat transport capacity can be further enhanced.

In the transformer winding cooling structure of the present invention, two working fluid sealing passages are provided inside the thin tube container, and these two working fluid sealing passages are communicated with each other at both ends thereof. According to the configuration, a loop-type thin tube heat pipe having a loop-shaped hydraulic fluid enclosing path is configured, and the loop-type thin tube heat pipe is used in place of the non-loop-type thin tube heat pipe in the configuration of claim 2 above.
In the loop type thin pipe heat pipe, heat is transported by the gentle circulation flow in addition to the axial vibration of the working fluid, so that the heat transport capability is further improved.

In the transformer winding cooling structure according to the sixth aspect of the present invention, n (n is an integer of 2 or more) loop-shaped hydraulic fluid filled passages are provided inside the loop-type capillary heat pipe. Therefore, the heat transport capacity can be significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration of a cylindrical winding showing a first embodiment of the present invention.

FIG. 2 is a partial sectional view of a cylindrical winding.

3A and 3B are cross-sectional views of a thin tube container.

4A to 4C are cross-sectional views showing a close fitting state of a thin tube container of a non-loop type thin tube heat pipe and a thin tube container of a loop type thin tube heat pipe.

FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a view corresponding to FIG.

FIG. 7 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG.

FIG. 11 is a view corresponding to FIG. 1 showing a fifth embodiment of the present invention.

FIG. 12 is a view corresponding to FIG.

FIG. 13 is a sectional view of a thin tube container.

FIG. 14 is a sectional view of a cooling pipe.

FIG. 15 is a cross-sectional view showing a close fitting state of a thin tube container and a cooling pipe of a non-loop type thin tube heat pipe.

FIG. 16 is a cross-sectional view of different thin tube containers.

FIG. 17 is a cross-sectional view of different thin tube containers.

FIG. 18 is a cross-sectional view of different thin tube containers.

FIG. 19 is a cross-sectional view of different capillary containers.

FIG. 20 is a sectional view of a different cooling pipe.

FIG. 21 is a cross-sectional view showing a close fitting state of a thin pipe container of a non-loop type thin pipe heat pipe and a different cooling pipe.

FIG. 22 is a cross-sectional view showing a close fitting state of two thin tube containers of a non-loop type thin tube heat pipe.

FIG. 23 is a front view of the end portion of the thin tube container showing the sixth embodiment of the present invention.

FIG. 24 is a partial side view of the thin tube container.

FIG. 25 is a partial vertical sectional side view of a thin tube container showing a seventh embodiment of the present invention.

FIG. 26 is a front view of the end of the thin tube container.

FIG. 27 is a side view, partly in vertical section, of a thin tube container with a closed groove.

FIG. 28 is a vertical sectional side view of a thin tube container showing an eighth embodiment of the present invention.

FIG. 29 is a front view of one end of the thin tube container.

FIG. 30 is a front view of the other end of the thin tube container.

FIG. 31 is a vertical sectional side view of a thin tube container showing a ninth embodiment of the present invention.

FIG. 32 is a front view of one end of the thin tube container.

FIG. 33 is a front view of the other end of the thin tube container.

FIG. 34 is a view showing a conventional configuration and conceptually showing a configuration of a loop type thin tube heat pipe with a valve body.

FIG. 35 is a cross-sectional view showing a cooling structure of a transformer winding using a thin tube heat pipe.

FIG. 36 is a cross-sectional view showing another cooling structure for a transformer winding using a thin tube heat pipe.

FIG. 37 is a view conceptually showing the structure of a loop-type thin tube heat pipe without a check valve.

FIG. 38 is a diagram conceptually showing the structure of a non-loop type thin tube heat pipe.

FIG. 39 is a view conceptually showing an operating state of a non-loop type thin tube heat pipe.

[Explanation of symbols]

10 is an insulating cylinder, 11 is an end support member, 12 is a spacing piece, 1
3 is a thin tube container, 13a is a winding start portion, 13b is a winding end portion, 14 is a thin tube container, 15 and 16 are hollow conductors, 17
Is an insulating layer, 18 is a heat conductive grease or resin, 20 is a spacing piece, 31 is a non-loop type thin tube heat pipe, 32 is a loop type thin tube heat pipe, 41 is a thin tube container, 42 is a hydraulic fluid sealing passage, and 43 is a cooling Pipe, 44 is resin, 45,
46 is a hydraulic fluid sealing passage, 47 is a groove portion, 48 is a lid member, 49
Brazing, 50 is a loop type thin pipe heat pipe, 51 is a hydraulic fluid sealing passage, and 52 and 53 are grooves.

[Procedure amendment]

[Submission date] April 15, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

By the way, recently, to overcome the disadvantages of the conventional type of heat pipes as described above, loop-type capillary tube heat pipe as a new type of heat pipes have been developed, JP 63-
The application is published in No. 318493. Furthermore, this output
As an application example of the invention of the application, "Structure of Electromagnetic Equipment" (Japanese Patent Laid-Open No. Sho 6-96)
No. 4-84699) has been proposed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014]

By the way, the important points to note here are: (a) loop type thin tube heat pipe for a desired heat transport amount as a condition for effectively operating this loop type thin tube heat pipe. It is necessary to alternately distribute the heat receiving portion and the heat radiating portion at an appropriate ratio in the pipe. (B) The loop type thin pipe heat pipe needs the circulation direction regulating means ( check valve ) 3 .

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Therefore, using a loop type thin tube heat pipe
When configuring a transformer winding, the winding work is described in (a) above.
It is necessary to take out a lot of heat dissipation parts from the middle of the winding
Therefore, the work efficiency was significantly hindered. Again
The arrangement of several check valves is mechanical in the winding, which is a thin tube container.
It means that the working part is arranged and the capillary tube container
This means increasing the number of connections to the
It will reduce the dependability. Furthermore, the check valve can be manually
Because it is manufactured more, there is no mistake in work
From this point as well, the reliability of the winding structure is reduced.
Met.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In addition, at the heat pipe seminar held in '91 -3-15 sponsored by Nikkan Kogyo Shimbun titled "Recent heat pipe application technology", a new "loop type thin tube without check valve " was newly added. "Heat pipe" and "non-loop type thin pipe heat pipe" were introduced , and the text said that.
These thin tube heat pipes are highly reliable and easy to wind.
Because it is good, self-cooling type winding for electric equipment, stationary equipment, etc.
It is suitable as a line, and it is stated that it is expected to be applied.
ing. The former of these thin tube heat pipes is disclosed in
No. 19090 and the latter are Japanese Patent Laid-Open No. 4-251189.
It is based on the invention that has been published as an application.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

Here, the "loop type thin tube heat pipe without a check valve " has a structure as shown in FIG.
Heat is transported by the axial vibration of the hydraulic fluid and the gentle circulating flow. This type of loop type thin tube heat pie
The puck has no check valve attachment, which improves flexibility.
The workability of the winding work is improved and the mechanical operation part is
There is no advantage that the reliability is greatly improved.
is there. Therefore, using this type of loop type thin tube heat pipe
Fig.35 and Fig.36, the transformer winding cooling device
As a step, or a winding that doubles as a transformer winding and its cooling means
When applied as a wire, conventional loop type with check valve
Extremely reliable compared to the case of using a thin tube heat pipe
It is possible to configure a winding body structure with high
It is possible to shorten the work time for

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

As shown in FIG. 38, the "non-loop type thin pipe heat pipe" is a thin pipe container 2 in which a working fluid is enclosed and both ends thereof are sealed off. The group of loops is configured as the heat receiving section group H, and the other loop group is configured as the heat radiation section group C. And FIG.
As shown in, heat is transported in the direction of arrow 9 only by the axial vibration (arrow 8) of the working liquid generated by evaporation / condensation of the working liquid by nucleate boiling 7. This "non-rou
"Type thin heat pipe" has no check valve mounting part
And the synergistic effect of not forming loops
It is extremely easy to handle both structurally and structurally.
It is possible to handle it exactly the same as the rectangular wire. "Non
When applying "loop type thin tube heat pipe"
Loop type thin pipe heat pipe with check valve and "Use check valve
"Loop type thin tube heat pipe"
Work efficiency is improved and work time is dramatically reduced.
Moreover, not only there is no mechanical operation part, but also the connection part of the thin tube
Winding using other types of thin tube heat pipes
It is possible to construct a winding structure that is more reliable than the wire structure.
You can Furthermore, the structure of both ends of the thin tube is closed
Since there is no turn section (bent tube section), it is constructed as a winding structure
Can be simplified and simplified, so it is better than other types of thin tube heat pipes.
It is also possible to reduce the size and weight.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

[0019] In this way "loop capillary tube heat pipe that does not use a check valve" is also "non-loop capillary tube heat pipe" also
Both are more reliable than conventional loop type thin tube heat pipes
The winding structure can be configured with more efficient working time.
I can. Especially the reliability of "non-loop type thin tube heat pipe"
Height and work time are dramatically reduced.
The size and weight of the body can be reduced, and the effect is extremely large.
There is However, all of these are basically loop-type capillary tubes.
Since it is a heat pipe, its heat transport
In order to configure the cooling structure of the winding structure with the high performance
The heat-receiving part and the heat-dissipating part in a proper ratio to the thin tube heat pipe.
Must be distributed alternately and the winding structure
Due to the complexity of the structure of the structure, the inefficiency of the construction work of the winding structure
It was not enough to solve the problem.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takera Maya 2121 No. Sayo, Asahi-cho, Mie-gun, Mie Prefectural Mie Plant, Toshiba Corporation (72) Inventor Nobuo Masaki 1-share, Toshiba-cho, Fuchu, Tokyo Company Toshiba Fuchu Factory (72) Inventor Kyofumi Nagata 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Head Office Co., Ltd. (72) Keiji Waku 1-1-1, Shibaura, Minato-ku, Tokyo Toshiba headquarters office

Claims (6)

[Claims] 1. In a transformer winding, a winding body is constituted by a non-loop type thin tube heat pipe in which a working fluid is enclosed in a hollow tubular capillary tube container, while the working fluid is filled in the hollow tubular capillary tube container. A predetermined portion of the loop type thin tube heat pipe that is enclosed and formed into a loop of a predetermined shape is brought into close contact with a predetermined portion of the non-loop type thin tube heat pipe to form a heat receiving portion and the remaining predetermined portion of the loop type thin tube heat pipe. The cooling structure of the transformer winding, wherein the heat dissipation part of the loop type thin pipe heat pipe. 2. In a transformer winding, a winding body is composed of a non-loop type thin tube heat pipe in which a working liquid is enclosed in a hollow tubular thin tube container, and a non-loop type thin tube heat pipe is provided with a predetermined portion. A cooling structure for a transformer winding, wherein a predetermined portion of a cooling pipe enclosing a cooling medium is brought into close contact, and an external heat exchanger and a circulation pump are connected to the remaining predetermined portion of the cooling pipe. 3. The cooling structure for a transformer winding according to claim 2, wherein the non-loop type thin tube heat pipe is provided with a plurality of hydraulic fluid sealing passages inside the thin tube container. 4. The cooling structure for a transformer winding according to claim 3, wherein the plurality of hydraulic fluid sealing passages are formed in a spiral shape that does not intersect. 5. A loop type having a loop-shaped hydraulic fluid sealing passage by providing two hydraulic fluid sealing passages inside a thin tube container and connecting these two hydraulic fluid sealing passages to each other at both ends thereof. A thin-film heat pipe is formed, and the loop-type thin-pipe heat pipe is provided in place of the non-loop-type thin-pipe heat pipe in the transformer winding cooling structure according to claim 2. Cooling structure. 6. A 2n (n is an integer of 2 or more) hydraulic fluid sealing passage is provided inside the thin tube container, and these 2n
A loop type thin pipe heat pipe having n loop-shaped hydraulic fluid sealing passages is formed by connecting two hydraulic fluid sealing passages of each of the hydraulic fluid sealing passages to each other at both ends thereof. The cooling structure for a transformer winding, wherein the mold capillary heat pipe is provided in place of the non-loop type capillary heat pipe in the transformer winding cooling structure according to claim 2.