JPS61131516A - Winding of stationary induction apparatus - Google Patents

Abstract

PURPOSE:To efficiently flow cooling fluid into horizontal channels and increase cooling effect for coils by arranging some insulating-cylinder-side oil plugs in insulating-cylinder-side vertical oil channels and also intermediate oil plugs in the central vertical oil channel. CONSTITUTION:Insulating-cylinder-side vertical oil channels, the central vertical oil channels and horizontal oil channels are formed between either of insulating cylinder of internal side and external side and the corresponding coil layers, between coil layers, and between vertical disklike coils respectively. Either of insulating-cylinder-side vertical oil channels is divided into more than two annular sections using insulating-cylinder-side oil plugs. An intermediate oil plug is fit midway through the central vertical oil channel in a section. If the step number of horizontal oil channels contained between the position of the insulator side oil plug and that of the intermediate oil plug in the upper stream of cooling fluid in one section is (n) and the corresponding step number in the lower stream is (m), the oil plugs are so arranged that m>=n and n/m=1-4/5 may be satisfied. It is further desirable that either (m) or (n) is determined to be less than 15 and preferably 5-10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stationary induction electric appliance winding, and more particularly to a music selection structure that improves the cooling effect of the winding.

[Technical background of the invention and its problems]

Among stationary induction electric appliances such as transformers and accelerators, for example, a conventional music selection structure in the winding of a transformer is shown in FIG. That is, an inner insulating cylinder 2 and an outer insulating cylinder 3 are provided at the outer part of the iron core l, and the inner and outer insulating parts 2 and 3 are
Interval C: Two rows of disk tenaki spring wire windings are arranged in the horizontal direction, and the winding layer 4-1 is arranged in parallel in the vertical direction.
84-v is wound around iron core l. In the axial direction of the iron core l (2. Although not shown, a plurality of cylinders of disc-shaped winding 4 are provided, and vertical oil on the insulating cylinder side is provided between the inner and outer insulating cylinders 2.3 and the winding layer 4-1゜4-! In addition, two central vertical oil passages 6 are provided between the winding layers 4-1, 4., and horizontal oil passages are provided in the winding layers 4-1, 4. 7t', and has a structure that allows a cooling fluid such as insulating oil to pass through each track selection 5, 6, and 7. In the figure, the cooling fluid is made to flow from the bottom to the top.

On the other hand, in the conventional music selection structure configured as described above, the results shown in Fig. 5 were confirmed by a visualizing experiment of the flow pattern B of the cooling fluid such as insulating oil in the horizontal oil pipe 7. . That is, the arrow 8 indicates the flow of the cooling fluid in the two sets of horizontal oil passages 7 between the two rows of disc-shaped windings 4, that is, the size and direction of the arrow indicate the flow velocity and direction, respectively.

When the direction of the flow is reversed as shown by arrow 8f2, there will always be a part where the flow velocity is very slow, and especially when the load on the winding becomes large, this flow will oscillate, and this part will be Heat exchange between the windings and the cooling fluid is inhibited, and the windings jWI 4-r and 4-z are locally overheated, which may lead to an accident in which the windings are stretched, shortened, or disconnected. For this reason: Increasing the dimensions of the horizontal oilway or vertical channel will lead to larger size, and it will be economical (both are the melting points that need to be solved).

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its purpose is to efficiently flow cooling fluid into and out of horizontal oil pipes, to have a high winding cooling effect, and to create a safe and compact stationary induction electric appliance. Our purpose is to provide windings.

[Summary of the invention]

In order to achieve such an object, according to the present invention, between the inner insulating cylinder and the outer insulating cylinder &: horizontal direction (two disc-shaped windings are
parallel (two disc-shaped winding layers are formed, and a horizontal vertical winding is formed between the inner and outer insulating cylinders and the winding layer, respectively, and the winding A central non-straight curve is formed between the layer and the winding layer, and the vertical disc-shaped windings C; each form a horizontal oil passage, and the insulating cylinder side vertical oil passage C; In addition to providing each oil column on the side of the insulating cylinder, an intermediate oil plug is provided in the middle of the central vertical oil channel in this divided compartment to form one compartment, and this compartment is divided into at least two
The horizontal oil path from the insulating cylinder side oil painting position upstream of the cooling fluid flow in one section to the intermediate oil plug position is set to n stages, and from this intermediate oil column to the cooling fluid flow. The number of stages of the horizontal oil pipe up to the position of the oil painting on the insulating cylinder side downstream of The present invention is characterized in that cooling fluid is efficiently flowed in and out of the horizontal oil passage, and the cooling effect of the winding layer is high, and a safe and small-sized stationary induction electric winding is provided.M or n is 1532 below. In particular, it is preferable to select the number of stages of the horizontal oil pipe so that the number of stages is between 5 and 10.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In FIG. 1, among stationary induction electric appliances such as transformers and reactors, for example, transformer windings are formed into disc-shaped windings, and inner and outer insulating tubes 1 are inserted into an iron core 11.
2 and 13, two rows of disc-shaped windings 14 and 14 (
Second, the disc-shaped windings 14 and 14 form horizontal oil passages in the axial direction, respectively, and are stacked in the axial direction (=layers of windings 14+1.
14-t is formed. Furthermore, the winding layer 14-t -14-
Absolutely simple side vertical curves 15-t, 15-t are formed between the -blade side of t and the inner and outer insulating tubes 12, 13, respectively. Further, a central vertical oil passage 16''4 is formed between the winding layers 14-t and 14-t.Furthermore, the winding layer 1
Horizontal oil passages 17-1-17-t are formed between each disc-shaped winding 14 of 4-t-14-z.
.

Assume that the cooling fluid vibrates from the bottom to the top as shown in Figure 1 (2). Between one side of the layer 14-1, that is, the insulating cylinder side vertical oil pipe 1
5-1 upstream and downstream insulating cylinder side oil column 18-1.18-
ot' is provided. Similarly, the outer insulating cylinder 13 and the winding layer 1'L
- Between one side of z and 9, that is, the insulation station side vertical curve selection 15-
z C upstream and downstream insulating cylinder side oil columns 19-j, 18-
Set 0. Note that the insulating cylinder side oil column 18-1.19-i is upstream to the flow of cooling fluid, that is, the inflow side, and the side frames 18-o and 19-0 on the insulation side are downstream of the flow of cooling fluid, that is, the inflow side. This is the outflow side. and upstream insulating cylinder side frame i
s-r, 19-r to 7 Heikoku selection 17-1, 17
-2, at the position where the number of steps is n steps,
Winding the intermediate oil column 20 on the central curved path 16 in the wire layer 14-8.14-
! Provided in between. Further, downstream from the intermediate oil column 20, there are vertical side plugs 18-o and 19-.

Horizontal oilway up to 17-1°17-! Assuming that the number of stages is tm, Om and n are selected so that n7m is 1 to T when m≧n. This m and n are 15
In the following, a value f2 of 5 to 10 is selected. The space between the insulating cylinder side frames 18i, 19i and 18-o, 19-o is defined as one section 21, and at least two of these sections are overlapped to form a transformer winding.

Next (2) The effects of the present invention will be explained. In Fig. 2, when m > n, the flow velocity 2 indicated by the arrows
2 shows the flow velocity 4 and the direction of the flow when the cooling fluid passes through a horizontal curved path. That is, the left and right sides shown are the horizontal curves I of the winding layers 14-t and 14-t in the section, respectively.
The flow velocity and direction at L 1 and ry-z l2 are shown. Also, the upper flow velocity (-1, middle oil column 20
For example, the length 21 of the arrow on the horizontal curved path 17-, -1 closest to the insulating cylinder side frame 18-o, 19-
The length of the arrow in the horizontal curve 17-1.17-zc near 0 is , and the length of the arrow in the horizontal curve 17-1. Length of arrow at, horizontal oil channel 17-+- near intermediate oil column 20
17-x (If the length of the arrow at - is b2, then m >
n and n/I′n=1 to 4/ヰ, and m and n are 15
5〉5 and 31az on the m side and between the 5 on the n side
There is a hot relationship.

Also, in the $3 diagram, when m = tt, 5 = 5a,
a.

There is a relationship like this. In this way, the cooling fluid that ascends through the vertical curve from the bottom can improve the cooling effect of the winding layer by flowing in and out regularly. .

〔Effect of the invention〕

Insulated side bend plugs 18-i, 18-o for Kei Naokoku selection;
19-i and 19-o, △ Also, by arranging the intermediate frame 20 on the central vertical curve 16, it is possible to change the direction of the cooling casing in the horizontal oil pipe, thereby increasing the ductile layer. Since the heat exchange between the coil and the cooling fluid is promoted, the cooling effect of the winding is high, and it is possible to provide a safe and compact stationary induction electric appliance.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the transformer winding of the present invention, Figures 2 and 3 are distribution diagrams of the flow velocity and direction of the cooling fluid at horizontal curve C in Figure U1, Figures 4 and 5 respectively. The figures are an nW sectional view of a conventional transformer winding and a distribution diagram of the flow velocity and direction of cooling fluid in a horizontal oilway. 11-... Iron core 12... Inner insulation tube 1
3...Outer insulating cylinder 14...Disc-shaped winding 14
-s, 14-t...Winding layer 15-1, 15-2...Insulating cylinder side vertical one way 16...
Central vertical oil pipe 171.1Lt...Horizontal oil pipe 18
-j, 18-o, 19-i, 19-0 +
+ Absent 1 moat local side plug 20... intermediate oil column 21.
... Ward 11u122 ... Flow velocity m, n ... Number of stages of horizontal oil pipe

Claims (2)

[Claims] (1) Two rows of disk-shaped windings are formed horizontally between the inner and outer insulating tubes, and disk-shaped winding layers are formed in parallel in the vertical direction. A vertical oil passage on the insulating cylinder side is formed between each of the winding layers, and a central vertical oil passage is formed between the winding layers in the vertical direction, and a vertical oil passage is formed between the disc-shaped windings in the vertical direction. In a stationary induction electric winding in which a cooling fluid is circulated so that each horizontal oil passage formed in the insulating cylinder side and the central vertical oil passage communicate with each other, the coil is divided into vertical oil passages on the insulating cylinder side. In addition to providing an oil plug on the side of the insulating cylinder, an intermediate oil plug is provided in the middle of the central oil pipe in this divided compartment to form one compartment, and at least two of these compartments are arranged to control the flow of cooling fluid in this one compartment. The number of stages of the horizontal oil path from the insulating cylinder side oil plug position upstream of the flow to the intermediate oil plug position is n stages, and from this intermediate oil tap to the insulating cylinder side oil plug position downstream of the flow of cooling fluid. A stationary induction electric appliance winding characterized in that the number of stages of the horizontal oil pipe is m, and the insulating cylinder side oil plug and the intermediate oil plug are arranged so that m≧n and n/m=1 to 4/5. . (2) The static induction electric device winding according to claim 1, wherein m or n is selected to be 15 or less, particularly 5 to 10.