JPS61144804A - Forced cooling oil-immersed electric apparatus winding - Google Patents

Abstract

PURPOSE:To obtain a small-sized machine of high cooling efficiency by a method wherein, when a coil having a plurality of stages separated by a horizontal oil passage is provided between the inner vertical oil passage and the outer vertical oil passage, a horizontal bent flow guide member having one end fixed to the inner insulating pipe and the outer insulating pipe between said coils alternately, and another vertical oil passage is provided on the coil located directly above the deposition member. CONSTITUTION:An inner insulated pipe 4 and an outer insulated pipe 5 are provided in an oil reservoir wherein insulating oil is filled up, and the coil stage consisting of a plurality of coils 3A which are separated by a horizontal oil passage 10 is placed in said insulated pipes while it is surrounded by the inner vertical oil passage 11 located on the side of the insulated pipe 4 and the outer vertical oil passage 12 located on the side of the insulated pipe 5. According to this constitution, a bent flow guide member 13 having one end fixed to the inner insulated pipe 4 or the other insulated pipe 5 for every prescribed coil stage is provided horizontally, a new oil passage 14 is provided on the side of the inner insulated pipe of each coil 3A, oil is circulated on the member 13, and the oil passage 14 of the coil 3A located on the member 13 is blocked up by an insulator 15.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a forced cooling oil input device winding.

[Background of the invention]

In general, oil-filled electrical appliances using oil forced circulation cooling have a conductor placed in a disc-shaped or spiral shape between the contents, that is, the iron core 2, an inner insulating tube 4, and an outer insulating tube 5 in an oil tank l, as shown in Fig. 3. A winding 3 formed by stacking a plurality of three coils wound in a shape in the axial direction is arranged, and an insulating oil 6 is sealed. A cooler 7 is connected to the oil tank 1 through an upper pipe 8 and a lower pipe 9, and the insulating oil 6 heat-exchanged by the cooler 7 is transferred to the oil tank 1. It is designed to be sent internally. That is, the insulating oil 6 is supplied to the oil tank 1, the upper pipe 8, the cooler 7, and the lower pipe 9 by the oil pump P as indicated by the arrow in the figure.
, oil tank 1, winding 3, and oil tank 1 are forced to circulate in this order.

The winding 3, which is made up of three coils, is the fourth
As shown in the figure, horizontal oil pipe 1 to each coil 3 people
It is formed with 0 interposed.

The winding 3 thus formed is connected to an inner insulating cylinder 4 and an outer insulating cylinder 5.
The inner and outer vertical oil pipes 11, 1 of predetermined dimensions are arranged between
2, and in order to improve the cooling of the winding 3, flow folding members 13 are arranged for alternately closing the inner and outer vertical oil passages 11, 12 for every plurality of coils 3A. By doing this, when the insulating oil rises through the inner vertical chamber 11 or the outer vertical chamber 12 as indicated by the arrow in the figure, the rising insulating oil is circulated through each horizontal chamber 10 and reversed. The sides are vertical to allow for smooth flow.

The flow velocity distribution of the insulating oil at each horizontal position 10 of the plurality of coils 3 constructed in this manner is shown by taking the position of the horizontal position 10 in comparison with FIG. 4 on the vertical axis and the flow velocity on the horizontal axis. The relationship between the horizontal flow rate 10 and the flow rate is shown in FIG. 5. As is clear from the figure, the flow velocity of the horizontal filter 10 located near the bottom of the folding member 13 that closes the inner vertical filter 11 or the outer vertical filter 12 is the fastest, and the flow rate decreases as the distance from this flow increases. The flow rate of the horizontal cleaner 10 on the insulating oil inlet side is extremely slow. Therefore, the flow velocity of the insulating oil becomes non-uniform, and the winding 3 is not cooled uniformly, and the temperature distribution of the winding 3 becomes non-uniform, and the cooling efficiency of the winding 3 decreases. Regarding this, the Special Publication Act 1978-178
There is a publication No. 42.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is an object of the present invention to provide a forced cooling oil-filled electrical device winding that improves cooling efficiency and enables miniaturization.

[Summary of the invention]

That is, in the present invention, a plurality of coils are stacked together with an iron core in an oil tank filled with insulating oil, and a plurality of coils are stacked through horizontal cleaning, and inner and outer vertical cleaning is performed between inner and outer insulating cylinders. A plurality of folded sections are formed by providing a folding member that alternately closes the inner and outer vertical oil sluices for each of a plurality of coils, and the entrance of the folded section. Multiple discs or lJA of nearby windings
#! It is characterized by the fact that a vertical winding is provided in the middle of the coil which is wound in a shape, and this causes the windings near the entrance of the folding section to form a plurality of disc-shaped or spiral-shaped windings. A vertical hole in the coil is provided in the middle of the wound coil.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on the illustrated embodiment. FIG. 1 shows an embodiment of the present invention. The same parts as those in the prior art are denoted by the same reference numerals, and the explanation thereof will be omitted. In this embodiment, a vertical coil 14 is provided between the coils 3 near the entrance of the flow section, which are wound into a plurality of discs or spirals. By doing this, a vertical coil 14 is provided between the three coils of the winding 3 near the entrance of the folding section, which are wound into a plurality of disk shapes or spiral shapes, and the cooling It is possible to obtain a single winding powered by forced cooling oil, which improves efficiency and enables miniaturization.

That is, a vertical coil 14 was provided in the middle of Coil/I/3A near the entrance of the folding section. In order to make the widths of the three coils the same, insulators 15 were inserted into the three coils other than those provided with the in-coil vertical opening 14. By doing this, the insulating oil is applied to the coil 3 near the entrance of the flow section.
The flow also flows into the vertical channel 14 in the coil provided at A, and the flow path resistance of the horizontal channel 10 near the entrance of the folded flow section becomes small, and the horizontal channel 10 compared to FIG. 1 is plotted on the vertical axis. As shown in Figure 2, which shows the relationship between the position of the horizontal aperture 10 and the flow velocity by taking the position of the horizontal aperture 10 and the flow velocity on the horizontal axis, the flow velocity is almost the same regardless of the position of the horizontal aperture 10. It has become. Therefore, unlike in the past, the flow velocity of the insulating oil is uneven and the windings are not cooled uniformly, and the cooling efficiency of the winding 3 does not decrease, and the winding 3 is cooled almost uniformly and the temperature is distributed. becomes almost uniform, and the cooling efficiency of winding 3 can be improved.
And oil-filled electrical appliances can be made smaller. This is because the insulating oil flows more easily to the three coils near the entrance of the folding section, and the three coils near the entrance of the folding section are cooled better than before.

In addition, in this embodiment, the in-coil vertical support 14, which is placed between the three coils, is provided between the second and third coils from the inside, but it is not limited to this position, and the coils 3A may have the same width. The insulator 15 inserted into the round shape is not necessarily required.

〔Effect of the invention〕

As described above, the present invention has improved cooling efficiency and can be made smaller, thereby making it possible to obtain a forced cooling oil power supply winding that has improved cooling efficiency and can be made smaller.

[Brief explanation of the drawing]

Fig. g1 is a partial vertical sectional side view of one embodiment of the forced cooling oil-filled electrical device winding of the present invention, Fig. 2 is a characteristic diagram showing the relationship between the horizontal position of the winding shown in Fig. 1 and the flow velocity; Figure 3 is a longitudinal side view showing the cooling of a forced cooling oil input coil, Figure 4 is a partial longitudinal side view of a conventional forced cooling oil input coil, and Figure M5 is a horizontal view of the winding shown in Figure 4. FIG. 3 is a characteristic diagram showing the relationship between the position of the fluid and the flow rate. 1...Oil tank, 2...Iron core, 3...Winding, 3A...
・Coil, 4... Inner insulation darkness, 5... Outer insulation tube, 6.
...Insulating oil, 7...Cooler, 10...Horizontal cooling, 1
1...Inner vertical alignment, 12...Outer vertical alignment, 13
... Folded flow member, 14... Vertical alignment within the coil, 15.
··Insulator. flow t + mouth l flow l

Claims (1)

[Claims] 1. The windings are housed together with the iron core in an oil tank filled with insulating oil, and multiple coils are stacked together via horizontal oil pipes, and inner and outer vertical oil pipes are installed between the inner and outer cylinders. , and in which a plurality of folded sections are formed by providing a folding member that alternately closes the inner and outer vertical oil passages for each of a plurality of coils, the area near the entrance of the folded flow section. 1. A forced cooling oil-energized device winding characterized in that a vertical oil passage within the coil is provided in the middle of a plurality of coils formed by winding into a plurality of disk shapes or spiral shapes.