JPH0685625B2 - Vertical axis electric machine rotor - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a rotor of a vertical rotating electric machine, and particularly to a rotor provided in a yoke and supporting a yoke and a field iron core. The present invention relates to a rotor of a vertical axis rotating electric machine having a discontinuous piece.

[Background of the Invention]

FIG. 1 shows a conventional example of a rotor of a vertical rotating electric machine. As shown in the drawing, the rotor is connected to the main shaft 1 of the upright shaft and rotates with the main shaft 1, a spider 2, a yoke 4 provided on the outer periphery of the spider 2 and tightened with tightening bolts 3, The yoke 4 is provided at a predetermined interval in the circumferential direction of the outer circumference of the yoke 4 and is composed of a field iron core 6 having a field coil 5 mounted thereon. In the figure, 7 is a lower shaft, 8 is a thrust bearing, 9 is a thrust bracket,
10 is an upper guide bearing, 11 is a guide bracket, 12 is a stator, 13 is a frame, 14 is a foundation, 15 is a collar, and 16 is a vibration-proof stay.

In the rotor configured as described above, a plurality of discrete pieces 17 having first and second discrete pieces 18 and 19 forming a radial ventilation path at a certain interval in the axial direction of the yoke 4. Is provided. And spider 2 and yoke 4
As shown in FIGS. 2 and 3, the hooking support of is provided with a concave hooking portion a on the outer peripheral portion of the spider abutting plate 2a on the outer circumference of the spider 2, and the concave hooking portion a is provided with a first hooking portion. Insert the Distant Piece 18, and this first Distant Piece
The weight of the yoke 4 and the field core 6 is supported by the convex hooking portion b at the tip of 18. Further, as shown in FIGS. 4 and 5, for example, the field core 6 is supported by projecting the second discrete piece 19a to the outer diameter side so that the field core 6 has a concave hook with a depth H. A stopper portion 6a is provided, and the outer diameter side end portion 19b of the second discrete piece 19a is inserted into and supported by the concave hook portion 6a, which has a width B ₀ of the second discrete piece 19a. The width B of the recessed hooking portion 6a is made larger and inserted. In the figure, L is the width of the field core 6.

When the field iron core 6 cannot be arranged as shown in FIG. 5 due to the restriction on the arrangement of the tightening bolts 3 due to the support of the field iron core 6, for example, the width L ₀ from the dovetail pillow 6b of the field iron core 6 is small and the field iron core 6 has a small width L _0. In the case where the magnetic iron core 6 comes off from the extension of the second disjoint piece 19a, the second disjoint piece is formed into an inverted T-shape as shown in FIG. 2 and FIG. This second piece 19 instead of the piece 19
Are supported by the bottom of the field iron core 6. In the figure
20 is a distant piece.

However, in this case, the cooling air passes only between the field iron cores 6 as shown by the arrows in the figure, and the cooling effect of the field iron cores 6 is reduced. Also in the case of the support by the first disjoint piece 18 described above, as shown in FIG. 3 described above, the cooling wind is the field core 6 and the field core 6 as indicated by the arrow in the figure. It only passes between and. On the other hand, in the portion without the above-mentioned concave and convex engaging portions a and b, that is, without the first and second discrete pieces 18 and 19, the cooling air flows as shown in FIG. And II, so that there is a large amount of them. By the way, these first and second discrete pieces 18 and 19 are the axes of the yoke 4 as shown in FIG. 2 above. Since the ventilation passages at the two positions of the steps S and T, which are provided at different positions in the direction (height direction) and where the first and second discrete pieces 18 and 19 are provided, are obstructed. , The required ventilation cannot be obtained. That is, P, Q where the discontinuous piece 17 is provided
In the stages of R and R, the ventilation passage is not obstructed and a sufficient amount of ventilation can be obtained, but in the stages of S and T, the ventilation passages are covered by the first and second discrete pieces 18 and 19 as described above. I will get out. Therefore, the amount of ventilation is reduced, and there is a risk that the field core 6 is overheated.

[Object of the Invention]

The present invention has been made in view of the above points, and provides a rotor of a vertical rotating electric machine that can improve the cooling effect of the field core even when the width from the tab tail pillow of the field core is small. It is intended.

[Outline of Invention]

That is, the present invention provides a spider that is connected to a main shaft of a vertical shaft and that rotates together with the main shaft, a yoke that is provided on the outer circumference of the spider, and a field magnet that is provided at a predetermined interval in the circumferential direction of the outer circumference of the yoke. A field iron core having a coil attached thereto, and a plurality of disjoint pieces including first and second disjoint pieces forming a radial ventilation path at a certain interval in the axial direction of the yoke. , The first disjoint piece is projected from the inner diameter of the yoke, and is inserted into the concave hooking portion provided on the spider abutment plate on the outer periphery of the spider to support the yoke, and the second disjoint piece is In a rotor of a vertical rotating electric machine which is projected from the outer periphery and is inserted into a concave hooking portion provided in the field core to support the field core, a first discontinuous piece supporting a yoke, This is characterized in that the second disjoint piece supporting the magnetic core is arranged at the same position in the axial direction of the yoke, whereby the first disjoint piece supporting the yoke and the field magnet. The second disjoint piece supporting the iron core obstructs ventilation at the same position in the axial direction of the yoke.

Example of Invention

Hereinafter, the present invention will be described based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS.
Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof will be omitted. In this embodiment, the first disjoint piece 18a that supports the yoke 4 and the second disjoint piece 19 that supports the field core 6 are arranged at the same position in the axial direction of the yoke 4. By doing so, the first discrete piece
Since the number of ventilation passages in which ventilation is obstructed by the 18a and the second discrete piece 19 is reduced, even if the width L _{0 of} the field core 6 from the dovetail pillow 6b is small, the cooling effect of the field core 6 is reduced. It is possible to obtain the rotor of the vertical rotating electric machine that can be improved.

That is, several discrete pieces to be loaded in the yoke 4
The yoke 4 is supported by a first disjoint piece 18a having a substantially central portion of the length 17 which is provided on the spider abutting plate 2a on the outer periphery of the spider 2. It is formed by having a convex hooking portion b having a length to be fitted into the concave hooking portion a, and this convex hooking portion b is arranged only at a position where the arm of the spider 2 is provided, and where there is no arm. Distant piece 17 is provided. And this first
The second T-shaped second discrete piece 19 for supporting the field core 6 is arranged on the same stage as the discrete piece 18a of FIG.
The assembling of these first and second disjoint pieces 18a, 19 was as follows. Spider 2 on support 21
Install a plurality of supports 22 on the outer circumference of the spider 2, and stack the yoke 4 on the support 22, but use the hire to stack the yoke 4 on the part without the spider pad 2a. Yoke 4 spider plate
After being piled up to the concave hook portion a of 2a, the first disjoint piece 18a for supporting the yoke 4 and the second disjoint piece 19 for supporting the field core are installed in the same stage, and after the installation, the yoke is installed. 4 is piled up to a predetermined level. The first
In FIG. 10, 23 is the floor surface. By doing so, the ventilation passage I in the stages of P, Q, R and T in which the discontinuous piece 17 is arranged is not obstructed, and the cooling air indicated by the arrow flows along the ventilation passage I. Second Distant piece 18a, 19
Although the air passage II is blocked only in the step of S provided with, the air passage II is blocked only in one place of this step of S, which is smaller than the conventional two places, and as a result, as a whole. It is possible to increase the amount of ventilation of the above, and to improve the cooling effect of the field core 6. By the way, as a result of forcing the air volume at the outlet of the stator, it was confirmed that it was improved by 5% from the conventional one.

〔The invention's effect〕

As described above, according to the present invention, the number of ventilation passages in which ventilation is obstructed by the first discontinuous piece supporting the yoke and the second discontinuous piece supporting the field core is smaller than that of the conventional one. The amount of ventilation increases, and the rotor of the vertical rotating electric machine that can improve the cooling effect of the field core even when the width of the field core from the dovetail pillow is small can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a conventional turbine generator for a vertical axis rotating electric machine rotor, FIG. 2 is a partial vertical sectional side view around a yoke of a conventional vertical axis rotating electric machine rotor, and FIG. FIG. 4 is a cross-sectional view taken along the line AA, FIG. 4 is a partial vertical cross-sectional side view showing a supporting state of a field core of another example of a rotor of a conventional vertical axis rotating electric machine,
4 is a sectional view taken along the line D-D of FIG. 4, FIG. 6 is a sectional view taken along the line BB of FIG. 2, and FIG. 7 is a sectional view taken along the line C-C of FIG. FIG. 8 is a side view, partly in vertical section, around a yoke of a rotor for a vertical axis rotating electric machine according to the present invention, FIG. 9 is a sectional view taken along line EE in FIG. 8, and FIG. 10 is a vertical axis according to the present invention. FIG. 11 is an explanatory view for explaining the assembling of the yoke of one embodiment of the rotor of the rotating electric machine, and FIG. 11 is a sectional view taken along the line FF of FIG. 1 ... Spindle, 2 ... Spider, 2a ... Spider contact plate, 4 ... Yoke, 5 ... Field coil, 6 ... Field core, 6a ... Recessed hook, 6b ... Dovetail pillow, 17 …… Distant piece, 18a …… First Distant piece, 19
...... Second disjoint piece, 20 ...... distant piece, a ...... concave hooking part, b ...... convex hooking part, L ₀ ...... width of field iron core from dovetail pillow.

Claims (1)

[Claims] 1. A spider that is connected to a main shaft of a vertical shaft and rotates together with the main shaft, a yoke provided on the outer periphery of the spider, a yoke provided on the outer periphery of the yoke at a predetermined interval in the circumferential direction, and a field. A plurality of disjoint pieces including first and second disjoint pieces that form a ventilation path in the radial direction at a certain interval in the axial direction of the yoke, The first disjoint piece is protruded from the inner diameter of the yoke, and is inserted into a concave hooking portion provided on the spider abutment plate on the outer periphery of the spider to support the yoke. In the rotor of a vertical rotating electric machine, which is protruded from the outer periphery of the yoke and is inserted into a concave hooking portion provided in the field iron core to support the field iron core, A rotor for a vertical axis rotating electric machine, wherein the first supporting piece for supporting and the second supporting piece for supporting the field core are arranged at the same position in the axial direction of the yoke. .