JP7255394B2 - Induction winding device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction winding device having a cooling fluid flowing therein.

Stationary induction electric appliances such as transformers and reactors usually consist of an iron core that serves as a path for magnetic flux, a winding that serves as a path for current that interlinks with magnetic flux, an insulator that insulates them, and their mutual position and mechanical strength. It is composed of a tightening device etc. for One of the common winding structures for such a static induction electric machine is a disk-shaped winding.

In the induction electric winding device disclosed in Patent Document 1, disk-shaped windings in which a conductor is wound in a disk shape between an inner insulating cylinder and an outer insulating cylinder are stacked in multiple stages in the axial direction. Horizontal ducts are formed in the radial direction of the disc-shaped windings by arranging a plurality of horizontal spacers radially between the disc-shaped windings at equal intervals.

An inner vertical duct is formed by providing an inner vertical spacer between the inner insulating tube and the disk-shaped winding. An outer vertical spacer is provided between the outer insulating tube and the disc-shaped winding to form an outer vertical duct.

In the induction winding device having the structure described above, the cooling fluid is forcibly introduced from below or is caused to flow by natural convection, thereby allowing the fluid to flow throughout the outer vertical duct, the inner vertical duct, and the horizontal duct. to cool the disc-shaped winding.

In the conventional induction electric winding device disclosed in Patent Document 2, grooves are provided in spacers arranged between disk-shaped windings, and a cooling fluid is allowed to flow into the grooves to improve cooling efficiency.

JP 2011-222643 A Japanese Utility Model Laid-Open No. 50-104915

In the conventional induction electric winding device shown in Patent Document 1, since the disc-shaped winding in the portion where the horizontal spacer is inserted does not directly contact the cooling fluid, the cooling efficiency of that portion is poor, and the disc-shaped winding is There was a problem with partial overheating.

In the conventional induction winding device disclosed in Patent Document 2, grooves are formed in the spacer to improve the cooling efficiency. I was afraid I wouldn't be able to do it.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the problems of the prior art as described above. To provide a winding device.

The induction electric winding device of the present invention is
an inner insulating tube and an outer insulating tube coaxially disposed outside the inner insulating tube; disc-shaped windings axially stacked in a plurality of stages between the inner insulating tube and the outer insulating tube; and the inner insulating tube. A plurality of inner vertical spacers arranged in the circumferential direction of the disc-shaped winding and extending in the axial direction at intervals from the inner side of the disc-shaped winding, the outer insulating cylinder and the disc-shaped winding A plurality of outer vertical spacers arranged in the circumferential direction of the disk-shaped winding and extending in the axial direction at intervals from the outside of the winding, and the disk-shaped winding adjacent in the axial direction. a plurality of horizontal spacers that maintain a gap and are arranged at intervals in the circumferential direction of the disk-shaped winding and formed to contact the inner vertical spacer and the outer vertical spacer; a cooling fluid flowing between vertical spacers, between adjacent said outer vertical spacers, and between adjacent said horizontal spacers, said horizontal spacers being closer to said disk-shaped winding than said inner vertical spacers and said outer vertical spacers. has a channel groove through which the cooling fluid flows in the radial direction of the disk-shaped winding , and in the circumferential direction of the disk-shaped winding, the horizontal spacer is the inner vertical spacer and the The flow channel groove is not provided in the range where the outer vertical spacer is arranged, and the flow channel groove is provided on the surface of the horizontal spacer contacting the disk-shaped winding.

In the induction electric winding device according to the present invention, the horizontal spacer is provided with a channel groove through which a cooling fluid flows in the radial direction of the disk-shaped winding outside the inner vertical spacer and the outer vertical spacer in the circumferential direction of the disk-shaped winding. As a result, the cooling area in the horizontal plane can be expanded while maintaining the strength, and the cooling performance of the disk-shaped winding can be improved.

1 is a cross-sectional view schematically showing the overall configuration of an induction electric winding device according to Embodiment 1; FIG. 1 is a perspective view showing an iron core and a winding portion of an induction electric winding device according to Embodiment 1; FIG. 2 is a perspective view showing the arrangement of windings and spacers of the induction electric winding device according to Embodiment 1. FIG. 4 is a perspective view of a horizontal spacer of the induction electric winding device according to Embodiment 1. FIG. 2 is a partial cross-sectional view perpendicular to the axis of the winding portion of the induction electric winding device according to Embodiment 1. FIG. 4 is a cross-sectional view showing the flow of coolant in the induction electric winding device according to Embodiment 1. FIG. 4 is a partial cross-sectional view parallel to the axis of the winding portion of the induction electric winding device according to Embodiment 1. FIG. FIG. 8 is a perspective view of a horizontal spacer of the induction electric winding device according to Embodiment 2; FIG. 8 is a partial cross-sectional view perpendicular to the axis of the winding portion of the induction electric winding device according to Embodiment 2; FIG. 10 is a perspective view showing the arrangement of windings and spacers of an induction electric winding device of a modification according to Embodiment 2; FIG. 11 is a partial cross-sectional view parallel to the axis of the winding portion of the induction electric winding device of the modification according to Embodiment 2; FIG. 10 is a partial cross-sectional view perpendicular to the axis of the winding portion of the induction electric winding device according to Embodiment 3; FIG. 11 is a perspective view of a horizontal spacer of an induction electric winding device according to Embodiment 3; FIG. 10 is a cross-sectional view showing the flow of coolant in the induction electric winding device according to Embodiment 3;

Hereinafter, each embodiment for carrying out the present invention will be described with reference to the drawings.

Embodiment 1.
FIG. 1 is a cross-sectional view schematically showing the overall configuration of an oil-filled self-cooling core transformer as an induction winding device according to Embodiment 1. In FIG. FIG. 2 is a perspective view showing a core and a winding portion of the induction electric winding device according to Embodiment 1. FIG. In FIG. 1, the oil-filled self-cooling core transformer of Embodiment 1 has a tank 12, an iron core 13, an insulating tube 14, a low-voltage winding 15, a high-voltage winding 16, a pipe 17, and a radiator 18. there is As shown in FIG. 2, the low-voltage winding 15 and the high-voltage winding 16 are attached to the iron core 13 so as to surround the legs of the iron core 13 . The iron core 13 , the low-voltage winding 15 and the high-voltage winding 16 are housed in a tank together with insulating oil or SF6 gas, which is a fluid medium for insulation and cooling, and cooled by a cooling fluid 19 . A radiator is connected to the tank, and the heat generated in the transformer is carried to the radiator by circulation of the cooling medium, where it is released to the outside air.

In the oil-filled self-cooling core transformer, an inner vertical duct 8 is formed by the inner side of the disk-shaped winding 1 and the inner insulating cylinder 2, as shown in FIG. An outer side of the disk-shaped winding 1, an outer insulating tube 3 and an outer vertical duct 9 are formed.

The disk-shaped winding 1 has an annular shape with a hole inside the disk. The disc-shaped winding 1 is formed in an annular shape by winding conductors such as a low-voltage winding 15 and a high-voltage winding 16 in a disc shape. The diameter of the outer circle of the annular shape is smaller than the diameter of the outer insulating cylinder 3 , and the diameter of the inner circle of the annular shape, that is, the diameter of the hole is larger than the diameter of the inner insulating cylinder 2 . The induction electric winding device has a columnar structure as shown in FIG. have.

A plurality of inner vertical spacers 6 are arranged at intervals in the circumferential direction between the inner insulating tube 2 and the inner side of the disk-shaped winding 1 to maintain the intervals of the inner vertical ducts 8 . A plurality of outer vertical spacers 7 are arranged at intervals in the circumferential direction between the outer insulating cylinder 3 and the outer side of the disk-shaped winding 1 to maintain the outer vertical duct 9 at intervals. The inner vertical spacer 6 and the outer vertical spacer 7 are made of insulating material. In the present invention, a duct means a flow path formed by a gap between spacers through which the cooling fluid 19 flows, and the flow path through which the cooling fluid flows is referred to as a duct.

FIG. 3 is a perspective view of the disk-shaped winding 1, the horizontal spacer 4, the inner vertical spacer 6, and the outer vertical spacer 7 of the induction electric winding device according to Embodiment 1, and is viewed from the inside. It is a perspective view when viewed. 3, the inside and outside of the disk-shaped winding 1 are linearly drawn to simplify the drawing, and the horizontal direction in the drawing is the circumferential direction of the disk-shaped winding 1. As shown in FIG. FIG. 4 is a perspective view of the horizontal spacer 4 of the induction electric winding device according to Embodiment 1. FIG. A plurality of horizontal spacers 4 are arranged to keep intervals between the disc-shaped windings 1 stacked in the axial direction, and are spaced apart in the circumferential direction for each disc-shaped winding 1 . In this manner, the disk-shaped winding 1 is formed with a flow path through which the cooling fluid 19 flows along the disk surface of the disk-shaped winding 1 . In the following description, the flow path formed between adjacent disk-shaped windings 1 stacked in the axial direction will be referred to as a horizontal duct 10 . A horizontal duct 10 is formed to connect between the inner vertical duct 8 and the outer vertical duct 9 . Horizontal spacers 4 maintain axial spacing of horizontal ducts 10 between axially adjacent disk-shaped windings 1 .

The horizontal spacer 4 is a plate-shaped member radially extending from the inside to the outside of the disk-shaped winding 1 . The circumferential width of the horizontal spacers 4 is greater than the circumferential width of the inner vertical spacers 6 . A portion of the inner side of the stacked horizontal spacers 4 is brought into contact with the inner vertical spacers 6 . That is, the plurality of stacked horizontal spacers 4 are arranged so as to overlap each other in the axial direction. The horizontal spacers 4 are made of an insulating material like the inner vertical spacers 6 and the outer vertical spacers 7, and it is preferable to use insulating members such as pressboards. Note that the width of a certain object in the circumferential direction is defined as a virtual circle with an arbitrary radius around the centers of the inner insulating tube 2 and the outer insulating tube 3. When such a circle overlaps with the certain object, This is the length of the longest circular arc.

The horizontal spacer 4 has a channel groove 5 through which the cooling fluid 19 flows in the radial direction of the disk-shaped winding 1 on the surface in contact with the disk-shaped winding 1 . The channel groove 5 is formed circumferentially outside the disk-shaped winding relative to the inner vertical spacer 6 and the outer vertical spacer 7 . In addition, the channel groove 5 is located inside the circumferential end of the horizontal spacer 4, that is, has a portion that maintains the spacing of the disk-shaped windings 1 outside the channel groove 5 in the circumferential direction. .

FIG. 5 is a partial cross-sectional view perpendicular to the axis of the winding portion of the induction electric winding device according to Embodiment 1, in which horizontal spacers 4 are arranged on the disk-shaped winding 1 at intervals in the circumferential direction. Indicates that This figure shows an example in which three horizontal spacers 4 are arranged at regular intervals around the circumference of the disk-shaped winding 1, that is, at intervals of 30 degrees. A horizontal duct 10 is provided between the circumferentially adjacent horizontal spacers 4 on the disk-shaped winding 1 . The interval between the horizontal spacers 4 adjacent in the circumferential direction is made larger than the width of the horizontal spacers 4 in the circumferential direction so that the cross-sectional area of the horizontal duct 10 is increased. The number and spacing of the horizontal spacers 4 can be changed arbitrarily.

The inner side of the horizontal spacer 4 and the inner vertical spacer 6, and the outer side of the horizontal spacer 4 and the outer vertical spacer 7 are made to contact each other. That is, the inner vertical spacer 6, the horizontal spacer 4, and the outer vertical spacer 7 are arranged at intervals in the circumferential direction, but they overlap at the rotation angle around the central axis of the inner insulating tube 2 and the outer insulating tube 3. placed in position.

The channel groove 5 formed in the horizontal spacer 4 opens toward the inner vertical duct 8 on the inner side and toward the outer vertical duct 9 on the outer side, forming a channel connecting them in the radial direction. In the horizontal spacer 4 of Embodiment 1, the area where the inner vertical spacer 6 and the outer vertical spacer 7 are arranged is solid without grooves, and is the main part for maintaining the interval between the disk-shaped windings 1. It's becoming

FIG. 6 is a cross-sectional view of the induction electric winding device according to Embodiment 1, and shows the flow of the coolant in a cross-section cut along plane AA along the radial direction of FIG. FIG. 7 is a cross-sectional view of the induction electric winding device according to Embodiment 1, and is a cross-section taken along the plane BB along the circumferential direction of FIG. In the inner vertical duct 8 and the outer vertical duct 9, blocking plates 11 are alternately provided for each of the plurality of disk-shaped windings 1 while being shifted in the axial direction, thereby blocking the flow of the inner vertical duct 8 and the outer vertical duct 9. are doing. The blocking plate 11 is made up of an annular plate or a plurality of fan-shaped plates forming an annular ring. It is closed, and its radially opposite side extends to the front of the vertical duct on the other side, but is not closed. As shown in FIG. 7, the closing plate 11 is preferably axially sandwiched and held by the horizontal spacers 4 in the same manner as the disk-shaped winding 1 .

The height dimension of the channel groove 5 may be adjusted to be less than half the thickness of the horizontal spacer 4 . The height dimension of the flow channel 5 refers to the height dimension of the flow channel 5 in the one-axis direction of the disk-shaped winding. Moreover, the position of the flow channel 5 in the height direction may be on the lower surface of the horizontal spacer 4 only, on the upper surface only, or on both the lower surface and the upper surface. As shown in FIG. 7, the horizontal spacer 4 in contact with the closing plate 11 is preferably formed with a channel groove 5 on the side in contact with the disk-shaped winding 1 .

4 shows an example in which the cross-sectional shape of the flow channel groove 5 is rectangular, but as long as the cooling fluid 19 can flow in, the groove may have a cross-sectional shape such as a semicircle, and is not particularly limited. not a thing

Although it is not essential, the cooling is promoted by the flow of the cooling fluid 19 when the blocking plates 11 are provided at various places on the disk-shaped winding 1 as described above. In FIG. 6, as the flow of the cooling fluid 19 is indicated by arrows, the cooling fluid 19 rising through the outer vertical duct 9 is blocked by the blocking plate 11, causing the horizontal duct 10 and the flow channel groove 5 to move radially inward. flows into the inner vertical duct 8. Furthermore, the cooling fluid 19 flowing through the inner vertical duct 8 is blocked by the upper blocking plate 11 , flows radially outward through the horizontal duct 10 and the flow channel 5 , and flows into the outer vertical duct 9 . In this way, a zigzag flow is generated upward in the axial direction, and the flow in the horizontal duct 10 and the flow channel 5 is promoted, so that the disk-shaped winding 1 can be efficiently cooled. However, this refrigerant flow is an example and is not limited to this. It is preferable to generate a pressure difference between the inner vertical duct 8 inside the horizontal duct 10 at a certain height in the axial direction and the outer vertical duct 9 outside the horizontal duct 10 not only by convection but also by the power of a pump or the like. As a result, one of the inner vertical duct 8 and the outer vertical duct 9 becomes upstream and the other becomes downstream, thereby promoting the flow in the horizontal duct 10 and the flow channel 5 in the radial direction.

The cooling fluid 19 takes heat from the disk-shaped winding 1 through the inner vertical duct 8, the outer vertical duct 9 and the horizontal duct 10, and the density is lowered. On the other hand, in the radiator 18, the cooling fluid 19 dissipates heat and the temperature drops, so the density increases. Therefore, a circulating flow of the cooling fluid 19 driven by the density difference between the cooling fluid 19 in the tank 12 and the cooling fluid 19 in the radiator 18 is naturally generated. The cooling fluid 19 can transfer the heat generated from the disc-shaped winding 1 to the radiator 18 by this circulation flow. Note that the cooling fluid 19 may be forcibly circulated by a pump or the like.

In Embodiment 1, the horizontal spacers 4 are arranged radially outward of the disk-shaped windings 1 relative to the inner vertical spacers 6 and the outer vertical spacers 7, respectively. By having, the cooling area in the horizontal plane can be expanded while maintaining the strength. That is, it is possible to improve the cooling performance of the disc-shaped winding 1 while maintaining the strength.

In addition, since there is no groove at the outermost part in the circumferential direction than the channel groove 5 and there is a portion for maintaining the interval between the disc-shaped windings 1, the strength for maintaining the interval is particularly excellent.

As described above, the induction electric winding apparatus having the configuration of the first embodiment can be operated at a higher output than before due to the improved cooling efficiency. As a result, it is possible to reduce the number of windings required for operation at the same output as in the conventional case, thereby reducing the manufacturing cost.

Embodiment 2.
An induction electric winding device according to Embodiment 2 will be described below. Since the induction electric appliance according to the second embodiment differs from the first embodiment only in the configuration of the horizontal spacer 4, the flow channel 5, the inner vertical spacer 6, and the outer vertical spacer 7, the induction electric appliance winding according to the first embodiment The description of the configuration that is similar to the line device will not be repeated.

FIG. 8 is a perspective view of the horizontal spacer 4 of the induction electric winding device according to the second embodiment. The radial length of the horizontal spacer 4 in the second embodiment is greater than the radial length of the disk-shaped winding 1, that is, the difference between the radii of the inner and outer circles of the disk-shaped winding 1. considered to be large. The radial ends of the horizontal spacers 4 protrude radially inside and outside the disc-shaped winding 1 from the disc-shaped winding 1 . The horizontal spacer 4 has radially opposite ends 20 which radially protrude so as to partially block the inner vertical duct and the outer vertical duct. Notches into which the inner vertical spacers 6 and the outer vertical spacers 7 are fitted are provided at the radial ends. The notch that serves as the fitting portion is formed so as to be sandwiched between the protruding portions 20 protruding most radially. The inner vertical spacer 6 and the outer vertical spacer 7 are arranged so as to fit into this notch, and the positions of the horizontal spacer 4, the inner vertical spacer 6 and the outer vertical spacer 7 are fixed. In FIG. 8, the shape of the notch of the horizontal spacer 4 and the cross-sectional shape of the inner vertical spacer 6 and the outer vertical spacer 7 are rectangular and trapezoidal in this embodiment. It is not particularly limited as long as it fits with and the positional relationship is constrained.

A flow channel 5 through which a cooling fluid 19 flows radially is formed at a protruding portion 20 of the horizontal spacer 4 and at a position outside the inner vertical spacer 6 and the outer vertical spacer 7 in the circumferential direction of the disk-shaped winding. ing. That is, the flow channel 5 is formed so that the flow channel 5 overlaps the protruding portion 20 , that is, the inner and outer ends of the flow channel 5 are located on the protruding portion 20 . The portion of the channel groove 5 covered by the disk-shaped winding 1 is closed, but the end of the channel groove 5 is not covered with the disk-shaped winding 1, so it serves as an opening through which the cooling fluid 19 flows in or out. Become. Since the channel groove 5 protrudes radially from the disk-shaped winding 1, the end of the channel groove 5 opens toward the vertical duct not only in the radial direction but also in the axial direction. The horizontal spacer 4 may be partially in contact with the inner insulating tube 2 and the outer insulating tube 3, but should have a gap between the inner insulating tube 2 and the outer insulating tube 3 at the position where the channel groove 5 is formed. It is preferable to do so. Since the end of the flow channel 5 is axially open to the vertical duct, the projection dimension of the projection 20 to the inner vertical duct 8 and the outer vertical duct 9 is not particularly limited. It may be closed radially. The inner vertical duct and the outer vertical duct are collectively called the vertical duct.

FIG. 9 is a partial cross-sectional view perpendicular to the axis of the winding portion of the induction electric winding device according to Embodiment 2, and is a cross-sectional view of the same portion as FIG. 5 of Embodiment 1. FIG. As shown in FIG. 9, the width of the horizontal spacer 4 and the channel groove 5 in the circumferential direction may be widened. For example, the total width of the flow channel grooves 5 in the circumferential direction may be larger than the width of the solid portion having no grooves in the radial direction. It is sufficient that the area of the solid portion for maintaining the axial distance is a certain width. Since the outermost portion of the horizontal spacer 4 in the circumferential direction is widened, the positions receiving the force in the axial direction are widely distributed, and the strength is increased. It is also possible to reduce the number of horizontal spacers 4 radially arranged on the disk-shaped winding 1 . Further, the horizontal spacer 4 may increase the thickness of the disk-shaped winding 1 in the axial direction to increase the height dimension of the channel groove 5 .

As described above, the horizontal spacer has protruding portions 20 radially inward and outward from the disk-shaped winding, and the protruding portion 20 has a disc-shaped winding from the inner vertical spacer 6 and the outer vertical spacer 7 . A flow channel 5 is provided on the outer side of the wire 1 in the circumferential direction. A part of the cooling fluid 19 that has ascended the inner vertical duct 8 and the outer vertical duct 9, for example, ascends the outer vertical duct 9 as it is. It flows to the inner peripheral side, joins the inner vertical duct 8, and flows upward again. In the flow of the cooling fluid 19 as described above, the protrusion 20 obstructs the upward flow of the cooling fluid 19 in the inner vertical duct 8 and the outer vertical duct 9, and the flow rate of the cooling fluid 19 flowing through the flow channel groove 5 is reduced. can be increased. By promoting the inflow into the flow channel groove 5, the cooling area for cooling the disk-shaped winding 1 is enlarged. Therefore, by providing the projecting portion, it becomes possible to cool the disk-shaped winding 1 efficiently.

In addition, since the end of the flow channel 5 is located at the protruding portion 20 and the protruding portion 20 protrudes into the inner vertical duct 8 or the outer vertical duct 9, the flow channel 5 is located at the inner vertical duct 8 or the outer vertical duct 9. has a portion that opens in the axial direction of the Therefore, the cooling fluid 19 vertically flowing through the inner vertical duct 8 or the outer vertical duct 9 can easily flow into or out of the channel groove 5 . As a result, the cooling of the disk-shaped winding 1 facing the flow channel 5 is improved in the induction winding device of the second embodiment.

Furthermore, the structure in which the inner vertical spacer 6 and the outer vertical spacer 7 are fitted together can increase the strength.

Next, a modified example of the second embodiment will be described. FIG. 10 is a perspective view showing the arrangement of windings and spacers of a modified induction winding device according to Embodiment 2, and is a cross-sectional view of the same portion as FIG. 3 of Embodiment 1. FIG. FIG. 11 is a partial cross-sectional view parallel to the axis of the winding portion of the induction winding device of the modification according to the second embodiment, and is a cross-sectional view of the same portion as FIG. 7 of the first embodiment. In this modified example, as shown in FIG. 11, the circumferential width of the channel groove 5 is changed according to the height position of the horizontal spacer 4. As shown in FIG. It is desirable to widen the width of the flow channel groove 5 in the circumferential direction as the horizontal spacer 4 is positioned higher in the axial direction of the disk-shaped winding 1 . Since the cooling fluid 19 that has cooled the disk-shaped winding 1 rises in the vertical duct due to convection, the temperature of the cooling fluid 19 flowing in the upper part becomes higher, and the temperature of the disk-shaped winding 1 located at the upper part tends to become higher. may become In this modified example, the circumferential width of the flow channel groove 5 located at the upper part in the axial direction is increased, so that the cooling efficiency of the disk-shaped winding 1 at the upper part in the axial direction is promoted. By making the temperature distribution in the cooling block of the disk-shaped winding 1 uniform in the axial direction, the maximum temperature of the winding can be reduced.

By widening the width of the channel groove 5 in the circumferential direction toward the upper portion in the axial direction, the mechanical strength of the horizontal spacer 4 can be maintained at the lower portion in the axial direction where the load from the structure increases. The cooling efficiency of the disk-shaped winding 1 can be improved and the material used for the horizontal spacer 4 can be reduced in the upper axial direction where the load due to the structure is small. In addition, since the plurality of horizontal spacers 4 in the axial direction are located at positions where the portions supporting the axial spacing are overlapped on the outer side of the channel groove 5 in the circumferential direction, the strength can be increased.

Furthermore, in the induction winding device of this modified example, the circumferential widths of the inner vertical spacer 6 and the outer vertical spacer 7 are gradually narrowed toward the top in the axial direction. The circumferential width of the inner vertical spacer 6 and the outer vertical spacer 7 is narrowed so that the inner vertical spacer 6 and the outer vertical spacer 7 fit in the notch of the horizontal spacer 4 when the circumferential width of the projecting portion 20 is widened. do. Although the width of the upper notch portion is thus narrowed, the width of the horizontal spacer 4 in the circumferential direction is kept unchanged in the axial direction. They are arranged to overlap in the axial direction. At the upper part where the widths of the inner vertical spacer 6 and the outer vertical spacer 7 are narrowed, the width of the protruding part 20 can be widened to widen the width of the flow channel 5 or enlarge the opening of the flow channel 5. Cooling efficiency can be promoted.

Although the widths of the inner vertical spacers 6 and the outer vertical spacers 7 are changed in the axial direction in this modified example, only the width of the channel groove 5 may be changed while keeping them constant.

Embodiment 3.
An induction electric winding device according to Embodiment 3 will be described below. Since the induction electric machine according to the third embodiment differs from the first embodiment only in the configuration of the horizontal spacer 4 and the flow channel groove 5, the same construction as the induction electric machine winding device according to the first embodiment will not be explained. Do not repeat.

FIG. 12 is a partial cross-sectional view perpendicular to the axis of the winding portion of the induction electric winding device according to the third embodiment. FIG. 13 is a perspective view of the horizontal spacer 4 of the induction electric winding device according to the third embodiment. FIG. 14 is a partial cross-sectional view of an induction electric winding device according to Embodiment 3, showing a DD cross section of FIG. As shown in FIG. 12, the induction winding device of the third embodiment reduces the number of horizontal spacers 4 arranged on the disk-shaped winding 1 as compared with the first embodiment. This figure shows an example in which two horizontal spacers 4 are arranged at regular intervals around the circumference of the disk-shaped winding 1, that is, at intervals of 45 degrees. Further, as shown in FIG. 13 , the flow channel 5 of Embodiments 1 and 2 is composed of an inner flow channel 21 , an outer flow channel 22 and a confluence portion 23 . The inner flow groove 21 on the radially inner side and the outer flow groove 22 on the radial outer side have different heights in the axial direction. In the horizontal spacer 4 sandwiched between two disk-shaped windings 1 adjacent in the axial direction, the inner flow groove 21 is a groove facing one of the disk-shaped windings 1, and the outer flow groove 22 is a groove facing one of the disk-shaped windings 1. It is the groove facing the other. The confluence portion 23 is formed as a hole penetrating the horizontal spacer 4 in the radial direction in the axial direction, and communicates the inner channel groove 21 and the outer channel groove 22 . The merging portion 23 becomes a hole facing both of the two disc-shaped windings 1 adjacent to each other. The radial position of the merging portion 23 is not limited to the radial center, and may be displaced inside or outside the radial center.

In the third embodiment, the width of the horizontal spacer 4 in the circumferential direction of the disc-shaped winding 1 and the thickness of the horizontal spacer 4 are increased as compared with the first embodiment. At least one of the circumferential width and height dimension of the disk-shaped winding 1 of the inner flow channel 21 and the outer flow channel 22 is larger than that of the first embodiment.

In the third embodiment, the inner channel groove 21 is formed on the upper surface of the horizontal spacer 4, and the outer channel groove 22 is formed on the lower surface of the horizontal spacer 4, as shown in FIGS. At this time, the positional relationship in the height direction between the inner channel groove 21 and the outer channel groove 22 may be upside down in the axial direction. The radially inner surface of the disk-shaped winding 1 and the radially outer surface of the disk-shaped winding 1 of the confluence portion 23 are not limited to vertical surfaces, and may be, for example, inclined surfaces of 45 degrees. Further, each edge of the confluence portion 23 is not limited to a right angle, and may be, for example, a curved surface.

Since the induction electric winding device according to the third embodiment has a structure in which the heights of the inner channel groove 21 and the outer channel groove 22 are different from each other and rise in steps as shown in FIG. The upward flow action creates radial flow to facilitate flow within the flow channel. In addition, as described in the first embodiment, the cooling fluid 19 flows axially upward through both the inner vertical duct 8 and the outer vertical duct 9, and one flows upstream and the other flows downstream. If this occurs, it is preferable to arrange a low channel groove on the upstream vertical duct side and a high channel groove on the downstream vertical duct side. By doing so, the flow in the flow channel promotes the flow upstream and downstream of the vertical duct, and the cooling efficiency of the disk-shaped winding 1 can be improved. Also, at the junction 23, the cooling fluid 19 cools the adjacent upper and lower disk-shaped windings 1. As shown in FIG. As a result, the cooling efficiency of the disk-shaped winding 1 can be improved.

Furthermore, when the end of the flow channel is located at the protruding portion 20, as shown in FIG. Since the cooling fluid 19 is facilitated not only to flow into the flow channel but also to flow out of the flow channel, the cooling efficiency of the disk-shaped winding 1 can be improved.

In addition, in the induction electric winding device according to the third embodiment, the number of horizontal spacers 4 arranged is reduced and the cooling area of the disk-shaped winding 1 is increased. can be improved.

Furthermore, by enlarging at least one of the radial width and height of the inner flow groove 21 and the outer flow groove 22, the flow resistance of the inner flow groove 21 and the outer flow groove 22 is reduced. Since the inflow of the cooling fluid 19 into the channel grooves 21 and the outer channel grooves 22 can be promoted, the cooling efficiency of the disk-shaped winding 1 can be improved.

As described above, the induction electric winding device according to each embodiment of the present invention can be operated at a higher output than before due to the improvement in the cooling efficiency. As a result, it is possible to reduce the number of windings required for operation at the same output as in the conventional case, thereby reducing the manufacturing cost.

However, the invention is not limited to the specific details and representative embodiments so illustrated and described. Further variations and effects that can be easily derived by those skilled in the art are also included in the present invention. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and equivalents thereof.

1 disc type winding 2 inner insulating cylinder 3 outer insulating cylinder 4 horizontal spacer 5 channel groove 6 inner vertical spacer 7 outer vertical spacer 8 inner vertical duct 9 outer vertical duct 10 horizontal duct , 11 closing plate, 12 tank, 13 iron core, 14 insulating cylinder, 15 low-voltage winding, 16 high-voltage winding, 17 piping,
18 radiator, 19 cooling fluid, 20 protrusion, 21 inner channel groove, 22
Outer channel groove, 23 confluence.

Claims (5)

an inner insulating cylinder and an outer insulating cylinder arranged coaxially outside thereof;
a disc-shaped winding laminated in multiple stages in the axial direction between the inner insulating cylinder and the outer insulating cylinder;
a plurality of inner vertical spacers arranged in the circumferential direction of the disc-shaped winding between the inner insulating cylinder and the inner side of the disc-shaped winding and extending in the axial direction;
a plurality of outer vertical spacers arranged in the circumferential direction of the disc-shaped winding between the outer insulating cylinder and the outer side of the disc-shaped winding and extending in the axial direction;
The space between the axially adjacent disc-shaped windings is maintained, and a plurality of the disc-shaped windings are spaced apart from each other in the circumferential direction of the disc-shaped windings to contact the inner vertical spacer and the outer vertical spacer. a horizontal spacer formed to:
a cooling fluid flowing between adjacent said inner vertical spacers, between adjacent said outer vertical spacers, between adjacent said horizontal spacers;
The horizontal spacer has a channel groove through which the cooling fluid flows in the radial direction of the disk-shaped winding outside the inner vertical spacer and the outer vertical spacer in the circumferential direction of the disk-shaped winding ,
In the circumferential direction of the disk-shaped winding, the horizontal spacer does not have the flow channel groove in the range where the inner vertical spacer and the outer vertical spacer are arranged,
The flow channel groove is provided on a surface of the horizontal spacer that is in contact with the disk-shaped winding.
An induction electric winding device characterized by: 2. The induction electric winding device according to claim 1, wherein the horizontal spacer has projections radially inside and outside the disk-shaped winding. 3. The induction electric winding device according to claim 1, wherein the higher the horizontal spacer, the wider the width of the channel groove. 4. The induction electric machine according to claim 1, wherein the width of the inner vertical spacer and the outer vertical spacer in the circumferential direction of the disc-shaped winding is gradually narrowed upward in the axial direction. Winding device. The flow channel groove includes an inner flow channel groove provided radially inside the disk-shaped winding, an outer flow channel groove provided radially outside the disk-shaped winding, and the horizontal spacer. a confluence portion penetrating in the axial direction and where the inner flow groove and the outer flow groove merge, wherein the inner flow groove and the outer flow groove are arranged in the axial direction of the disk-shaped winding provided at different positions in the
The cooling fluid radially flows from the inner flow groove to the outer flow groove via the confluence in the radial direction of the disk-shaped winding.
The induction electric winding device according to any one of claims 1 to 4, characterized in that:

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