JPH0884461A - Rotor of superconducting rotary electric machine and manufacture thereof - Google Patents

Abstract

PURPOSE: To obtain a rotor outer tube, excellent in jointing strength and ease of assembly, that achieves sound jointing even if the diameter or axial length of a normal temperature damper is excessively increased. CONSTITUTION: A rotor outer tube 21 of three-layer structure is obtained by placing an inside and an outside damper supports 21b, 21c inside and outside a normal-temperature damper 21a, respectively and integrating them into one piece. A rotor inner tube for housing a cooling medium is coaxially placed in the rotor outer tube 21. Torque tubes formed at both ends of the rotor inner tube are secured on the rotor outer tube 21 to form the rotor of a superconducting rotary electric machine. The normal-temperature damper 21a comprising the rotor outer tube 21 is composed of a plurality of damper members divided in the circumferential direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a superconducting electric rotating machine and a method of manufacturing the same by using a cooling medium made of liquid helium.

[0002]

2. Description of the Related Art Conventionally, there is a typical superconducting rotating electric machine of this type, for example, a rotor of a superconducting generator having a structure as shown in FIGS. That is, the rotor shown in FIG. 15 and FIG. 16 is provided with a rotor outer cylinder 1 having end shafts 2 attached to both ends thereof, a rotor outer cylinder 1 provided coaxially with the rotor outer cylinder 1, and cooling inside thereof. Liquid helium 3 as medium
Is formed from the rotor inner cylinder 4 in which

A torque tube 5 extending in the axial direction is attached to both ends of the rotor inner cylinder 4, and one end of the torque tube 5 is attached to an end shaft 2 via a rotor outer cylinder 1 by a bolt or the like. Firmly fixed and the other torque tube 5
Of the rotor outer cylinder 1 and the rotor inner cylinder 4 absorbs heat shrinkage of the rotor outer cylinder 1 and the rotor inner cylinder 4, for example, by a diaphragm-shaped heat shrinkage absorber 6 between the rotor outer cylinder 1 and the mounting base end of the end shaft 2. Are connected in between.

On the other hand, a superconducting coil 8 is housed in a coil groove 7 formed on the outer peripheral surface of the rotor inner cylinder 4, and the superconducting coil 8 is fixed by using a wedge 9 and an insulator 10. Further, the superconducting coil end portion 11 protruding outward from the rotor inner cylinder 4 is firmly fixed using a retaining ring 12 so as to sufficiently withstand centrifugal force and electromagnetic force. Also,
A central rotating tube 13 is inserted into the rotor inner cylinder 4 through one shaft end portion 2, and the superconducting coil 8 is cooled by the liquid helium 3 supplied from the central rotating tube 13.

Further, a radiation shield 14 for preventing heat from entering from the normal temperature region to the inside is provided between the rotor inner cylinder 4 at a temperature substantially the same as the temperature of liquid helium and the rotor outer cylinder 1 at a normal temperature state. Torque tubes 5 at both ends of the rotor inner cylinder 4
Are coaxially arranged straddling the mounting seats 15 formed at 1, and the ends thereof are fixed on the mounting seats 15.

By the way, in the rotor of the superconducting generator having such a structure, the rotor outer cylinder 1 also serves as a vacuum container and prevents penetration of an AC magnetic field and prevents the same as the rotor at the time of load change and at the time of load change. It comprises a normal temperature damper 1a for preventing the same as the rotor, and a three-layer structure in which the normal temperature damper 1a is sandwiched from the outer diameter side and the inner diameter side by an outer damper support 1c of a high strength member and an inner damper support boat 1b.
When the centrifugal force and the electromagnetic force are simultaneously applied during the operation, the rotor outer cylinder 1 having the three-layer structure is deformed and the layers are separated.

Therefore, the room temperature damper 1a made of a highly conductive metal is used.
There is a method of integrating the inner damper support 1b and the outer damper support 1c of high-strength non-magnetic metal by diffusion bonding.

The diffusion bonding of this cylindrical body is performed by the room temperature damper 1.
While machining the inside and outside diameters of a with high precision, the outer peripheral surface of the inner damper support 1b and the inner peripheral surface of the outer damper support 1c that are joined to each other are also machined with high precision.
The cylinders are superposed and joined together by applying a high pressure with a high temperature gas, and the smaller the clearance between the cylinders during assembly, the stronger the joining.

[0009]

By the way, in a large-capacity superconducting generator of several hundred thousand kW which is put into practical use in a thermal power plant, the room temperature damper has a diameter of about 1 m and an axial length of about several m. It is getting larger.

However, even with such a large room temperature damper, the thickness of the cylinder of highly conductive metal is as thin as about 10 mm, and a copper alloy is used for this metal because of its high conductivity. This copper alloy is a high-strength, non-magnetic, soft cylinder having a larger radial and axial dimension than the outer damper supports 1b and 1c, and is suitable for peripheral surface grinding such as plate thickness adjustment of this cylinder. It is extremely difficult to process accurately without causing deformation.

Further, the inner and outer damper supports 1b and 1c
When assembling into a three-layer structure with the cylinder sandwiched, since the room temperature damper 1a is inserted so as to prevent damage and deformation between the cylinders, the clearance between the cylinders increases, and the diffusion bonding strength increases accordingly. There is a problem of decrease.

The present invention has been made in view of the above-mentioned circumstances, and a sound joint can be obtained even if the diameter and the axial length of the room temperature damper become large, and the joint strength and the assemblability are excellent. An object of the present invention is to provide a rotor for a superconducting rotating electric machine and a method for manufacturing the same.

[0013]

In order to achieve the above object, the present invention provides a rotor for a superconducting rotating electric machine and a method for manufacturing the same by the following means. (1) The cooling medium is housed in a rotor outer cylinder having a three-layer structure in which a room temperature damper made of a conductive member is sandwiched from the outer diameter side and the inner diameter side by inner and outer supports made of a high-strength non-magnetic member and integrated. In a rotor of a superconducting rotary electric machine in which a rotor inner cylinder is coaxially provided, and torque tubes provided at both ends thereof are attached to a rotor outer cylinder, the normal temperature damper forming the rotor outer cylinder is circled. A plurality of damper members divided in the circumferential direction constitute a rotor of the superconducting rotating electric machine. (2) In a method of manufacturing a rotor of a superconducting rotating electric machine, wherein a cylinder of an outer support is arranged in a high-strength non-magnetic member with a room-temperature damper made of a conductive member sandwiched therebetween to form a three-layer structure rotor, the room-temperature damper is used. Formed with a plurality of divided damper bars, insert these damper bars between the inner damper support and the outer damper support, and then integrate them with the inner and outer damper supports by diffusion bonding to manufacture a rotor for a superconducting rotating electric machine. To do.

[0014]

In the rotor of the superconducting rotary electric machine having the above-mentioned structure (1), the inner damper support and the outer damper support of the high-strength nonmagnetic member and the rigidity higher than those of the high-strength nonmagnetic member are provided. When a rotor outer cylinder of a superconducting rotary electric machine with a three-layer structure is formed by combining with a room temperature damper made of an inferior conductive member, the inner damper support and the outer damper support are each an integral cylinder, whereas
The room temperature damper is composed of multiple divided damper bars, and the damper bar is inserted between the inner damper support and the outer damper support to assemble, so the radial clearance between the assembled damper bar and the inner and outer damper supports is small. Then, by forming a three-layer structure by integrating them, it is possible to process into a predetermined damper shape and damper size.

In the method of manufacturing a rotor for a superconducting rotating electric machine as described in (2) above, the room temperature damper of the rotor outer cylinder is constructed by using a damper bar of a highly conductive member as a component necessary for diffusion bonding. The processing and structure of the damper can be facilitated, and the normal temperature damper and the inner and outer damper supports can be soundly joined to each other, and the joining state can be excellent.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are axial and radial cross-sectional views showing a first embodiment of a rotor outer cylinder before diffusion bonding in a rotor of a superconducting rotary electric machine according to the present invention.

As shown in FIGS. 1 and 2, the rotor outer cylinder 21 is made of a highly conductive metal such as chrome copper between the inner damper support 21b and the outer damper support 21c made of high strength non-magnetic metal such as A286. It is configured by inserting the room temperature damper 21a.

The room temperature damper 21a is composed of a plurality of damper bars 21a1 divided in the circumferential direction, and has an inner damper bar support 21b and an outer damper bar support 21.
After setting c, the damper bars 21a1 are sequentially inserted over the entire circumference between the supports for assembly.

With the rotor outer cylinder 21 having such a structure, it is a long thin cylinder which is extremely difficult to be machined with high accuracy, and the outer diameter of the soft material is not ground. Since the risk of contact damage is reduced, the clearance 22 between the room temperature damper 21a and the inner damper support 21b and the outer damper support 21c can be reduced.

Next, a second embodiment of the rotor outer cylinder before diffusion bonding according to the present invention will be described with reference to FIGS. 3 and 4. FIG.
Is an end view in the light direction of the rotor outer cylinder 21, and FIG. 4 is an end view in the radial direction of a part of the damper bar forming the normal temperature damper 21a.

As shown in FIG. 3, the rotor outer cylinder 21 is A28.
Inner damper support 21 made of high strength non-magnetic metal such as 6
A normal temperature damper 21a made of a highly conductive metal such as chrome copper is inserted between the outer damper support 21c and the outer damper support 21c.

This room temperature damper 21a is divided into a plurality of damper bars 21a2 as shown in FIG.
After setting the inner damper support 21b and the outer damper support 21c, the inner and outer damper supports 21
Each damper bar 21a2 is sequentially inserted between b and 21c over the entire circumference to assemble the room temperature damper 21a.
Is configured. In this case, each damper 21a is formed by forming the circumferential side surface of the damper bar into a taper 23 shape.
No. 2 wraps in the circumferential direction to increase the joint area.

The room temperature damper 21a having such a structure is
It is easy to receive a pressing force in the radial direction during diffusion bonding, and the bondability is improved. In particular, a large effect can be exerted when a large-diameter room temperature damper 21a is required due to the large size of the rotor outer cylinder 21.

In the second embodiment, the side surface of the damper bar in the circumferential direction is tapered and lapped to increase the joint area. However, as shown in FIG. 5, the damper bar 21a2 is formed.
A stepped portion 24 may be provided on the side surface in the circumferential direction to wrap this portion.

Next, a third embodiment of the room temperature damper 21a of the rotor outer cylinder before diffusion bonding according to the present invention will be described with reference to FIG. FIG. 6 is an axial sectional view of the room temperature damper. The room temperature damper 21a is composed of a plurality of circumferentially divided damper bars 21a3 and a ring-shaped short-circuit ring 25 that short-circuits both ends of the damper bar 21a. After setting the inner damper support 21b and the outer damper support 21c. After the damper bars 21a3 are sequentially inserted between the inner and outer damper supports 21b and 21c over the entire circumference, short-circuit rings 25 are inserted from both ends of the rotor outer cylinder 21 to assemble the normal temperature dampers 21a. .

In this case, the thickness of both ends of the damper bar 21a3 in the radial direction is made thinner by the thickness of the short-circuit ring 25 than in the central portion. In addition, a step 2 is formed at the axial end of the damper bar.
6 is provided and the damper bars 21a3 are lapped in the radial direction to increase the joint area.

In the room temperature damper 21a having such a structure, the pressing force in the radial direction is easily received during the diffusion bonding,
The bondability can be improved. In the third embodiment described above, the step 26 is provided on the joint surface of the damper bar 21a3 and the short-circuit ring 25 to wrap the step 26, thereby increasing the joint area.
As shown in FIG. 7, a taper 27 may be formed at both ends of the damper bar 21a3 to wrap the short circuit ring 25.

Next, a fourth embodiment of the room temperature damper of the rotor outer cylinder before diffusion bonding according to the present invention will be described with reference to FIG.
FIG. 8 is an axial sectional view of the room temperature damper. As shown in FIG. 8, the temperature raising damper 21a radially divides a plurality of circumferentially divided damper bars 21a4, and the divided surfaces are tapered 28 in the axial direction.
1a4a, 21a4b, and after setting the inner damper support 21b and the outer damper support 21c,
2 in the radial direction between the outer damper supports 21b and 21c
The outer damper bar 21a4a or the inner damper bar 21a4b, which has a tapered shape 28 in the axial direction on the divided surfaces, is first inserted sequentially, and then the remaining damper bars are inserted and assembled to form the room temperature damper 21a.

For example, the inner and outer damper supports 21
After the outer damper bar 21a4a is sequentially inserted between b and 21c, the inner damper bar 21a4b is also sequentially inserted in the same manner to assemble the room temperature damper bar 21a after assembly.
It is possible to reduce the radial clearance between the inner and outer damper supports 21b and 21c.

In the room temperature damper 21a having such a structure, the radial pressure is more likely to be received due to the smaller radial clearance during diffusion bonding, and the bondability can be improved.

Next, a fifth embodiment of the room temperature damper of the rotor outer cylinder before diffusion bonding according to the present invention will be described with reference to FIGS. 9 and 10. 9 is a partially developed view of the room temperature damper as viewed from the radial direction, and FIG. 10 is a radial end view of the rotor outer cylinder 21. As shown in FIG. 9 and FIG. 10, the room temperature damper 21a includes a plurality of circumferentially divided damper bars 21.
It consists of a damper bar 21a5a in which the side surface of the damper bar between a5 is tapered 29 in the axial direction. After setting the inner damper support 21b and the outer damper support 21c,
The normal temperature damper 21a is formed by alternately inserting the damper bars 21a5a between the inner and outer damper supports 21b and 21c over the entire circumference and assembling them.

In the room temperature damper 21a having such a configuration, the damper bar side surfaces between the damper bars 21a5a are tapered in the axial direction, so that the circumferential direction of the side surface between the plurality of circumferentially divided damper bars is increased. The clearance can be reduced. Also, room temperature damper 2
1a is subjected to radial pressure due to the small circumferential clearance of each damper bar 21a5a during diffusion bonding, and can improve the bondability between each damper bar.

Next, a sixth embodiment of the room temperature damper of the rotor outer cylinder before diffusion bonding according to the present invention will be described with reference to FIG. FIG. 11 is a partial view of a radial end surface of the rotor outer cylinder 21. As shown in FIG. 11, the room temperature damper 21a is composed of an outer damper bar 21a6a and an inner damper bar 21a6b, which are formed by further forming a plurality of circumferentially divided damper bars 21a6 into two layers in the radial direction.
After setting a6b and outer damper bar 21a6a,
When a plurality of damper bars 21a6 are sequentially inserted around the entire circumference between the outer damper supports 21b and 21c to assemble, side surfaces between the outer damper bars 21a6a and side surfaces between the inner damper bars 21a6b are circumferentially arranged. Room temperature damper 21
a.

In the room temperature damper 21a having such a structure, the side surfaces between the outer damper bars 21a6a and the side surfaces between the inner damper bars 21a6b are displaced from each other in the circumferential direction. Even if the gaps between them are large, even if the gaps between the circumferential side surfaces of the damper bars are not joined by diffusion joining, the outer damper bar 21a6a and the inner damper bar 21a6b are easily subjected to the pressure in the radial direction. At the same time, the room temperature damper 21a can be easily and integrally formed into a cylindrical shape.

Next, a seventh embodiment of the room temperature damper of the rotor outer cylinder before diffusion bonding according to the present invention will be described with reference to FIG. FIG. 12 is a radial end view of the rotor outer cylinder 21. As shown in FIG. 12, the room temperature damper 21a is composed of a plurality of circumferentially divided damper bars, and the damper bars 21a7a, 21a, 21a7, 21 are made of different materials.
It is composed of a7b. Inside damper support 21
After setting b and outer damper support 21c,
When a plurality of damper bars 21a7a, 21a7b are sequentially inserted over the entire circumference between the outer damper supports 21b, 21c for assembly, for example, the damper bar 21a7a made of a highly conductive metal is arranged on the side of the center axis 30 between poles, and the magnetic pole center is arranged. Axis 31
The non-magnetic and non-conductive metal damper bar 21a7b is arranged on the side to form the room temperature damper 21a.

In the room temperature damper 21a having such a structure, for example, the damper bar 2 made of a highly conductive metal on the side of the center axis 30 between poles where the superconducting coil is installed from the stator side.
Since it passes through the low resistance current path of 1a7a, the current value increases and the magnetic shield effect also increases, so that the fluctuating magnetic field does not enter the superconducting coil.

Therefore, the current rise value of the superconducting coil during power fluctuation is suppressed, and the superconducting state is maintained. On the other hand, by disposing the non-magnetic and non-conductive metal damper bar 21a7b on the side of the magnetic pole center axis 31, there is no problem because the superconducting coil is separated even if the fluctuating magnetic field enters, and the main passage of the rotating magnetic field is also eliminated. The magnetic pole center shaft 31 side damper bar 21a7b is not magnetically shielded, and a high-strength material can be selected as much as high conductive metal is not required. When the damper supports 21b and 21c are integrated by diffusion bonding, a rotor outer cylinder having high rigidity can be obtained.

In the seventh embodiment of the present invention described above, a damper bar 21a7a made of a highly conductive metal is provided on the side of the center axis 30 between poles, and a damper bar 21a7 made of a non-conductive metal is provided on the side of the magnetic pole center axis 31.
Although two types of materials, b), are used, the conductivity of the circumferential damper bar may be changed to several types or may be arbitrarily arranged in the circumferential direction. Further, both ends of the damper bar may be used together with a short circuit ring as in the third embodiment.

Next, the first method of manufacturing the rotor outer cylinder of the present invention will be described.
Description will be made based on the rotor outer cylinder before diffusion bonding of the embodiment of FIG.
In FIG. 1 and FIG. 2, a rotor outer cylinder 21 of a superconducting rotating electric machine is a normal temperature metal made of high conductivity metal such as chrome copper between an inner damper support 21b and an outer damper support 21c made of high strength non-magnetic metal such as A286. A plurality of damper bars 21a1 obtained by dividing the damper 21a in the circumferential direction are sequentially inserted over the entire circumference and assembled, and then seal welding rings are provided on both end surfaces of the rotor outer cylinder 21 between the inner damper support 21b and the outer damper support 21c. The space between the supports in which the damper bars 21a1 are inserted is vacuum-evacuated, and the rotor outer cylinder 21 is placed in a pressure vessel of a diffusion bonding apparatus (not shown) that is hermetically sealed in a vacuum atmosphere. Then, an inert gas such as argon is charged under pressure.

After that, the pressure is increased by heating with a heater or the like to further heat the inert gas in the pressure vessel. When the temperature and gas pressure suitable for diffusion bonding are obtained, the outer damper supports 21b and 21c of the high-strength nonmagnetic metal and the damper bar 21a1 of the highly conductive metal are maintained while maintaining the temperature and gas pressure constant. Diffusion bonding is performed.

By this diffusion bonding, the damper bar 21a1 made of a soft and highly conductive metal is firmly joined to the outer damper supports 21b, 21c of the hard high-strength non-magnetic metal to be integrated, and at the same time, the side surfaces of the damper bar 21a1 are also joined together. The rotor outer cylinder 21 having a high rigidity can be obtained by being combined with each other to form a cylindrical room-temperature damper 21a and having a three-layered structure.

Further, the normal temperature damper 21a of the rotor outer cylinder 21 of the superconducting rotating electric machine shown in each of the above-described embodiments is designed to have a damper bar design in which the normal temperature damper 21a is divided in the circumferential direction. It is sufficient to manufacture a damper bar that does not require a damper to be manufactured and that has a high processing dimensional accuracy and whose surface roughness can be processed to a predetermined accuracy required for diffusion bonding.

Therefore, it is possible to join a three-layer structure including a high-conductivity metal having a relatively thin plate thickness and a small rigidity, even though it is a large structure, and the soundness of the joined portion is improved. In addition, the dimensional accuracy can be processed with high precision corresponding to the design specification value.

Next, a ninth embodiment of the room temperature damper of the rotor outer cylinder before and after the diffusion bonding according to the present invention will be described with reference to FIGS. 13 and 14. FIG. 13 shows a rotor outer cylinder 21 before diffusion bonding.
14 is a partial view of the radial end surface of FIG. 14, and FIG. 14 is a partial view of the radial end surface of the rotor outer cylinder 21 after diffusion bonding.

As shown in FIGS. 13 and 14, the thickness (t) of the inner damper support 21b made of a high-strength non-magnetic metal is set.
By making 1) thicker than the thickness (t2) of the outer damper support 21c, the outer damper support 21c becomes the damper bar 21 due to the inert gas pressure of the pressure vessel during diffusion bonding.
Since the inner damper support 21b is quickly brought into compression contact with and joined to the inner damper support 21b via the a8, the circumferential cap x on the side surface between the plurality of circumferentially divided damper bars 21a8 is also eliminated, and the joining property between the respective damper bar side surfaces is eliminated. And a three-layer structure including the inner and outer damper supports 21b and 21c is integrated, and a highly rigid rotor outer cylinder 21 can be obtained.

[0046]

As described above, according to the present invention, the room temperature damper made of a good conductive metal is sandwiched between the outer damper support and the inner damper support made of a high-strength nonmagnetic metal from the outer diameter side and the inner diameter side. Since the room temperature damper of the rotor outer cylinder with the three-layer structure is composed of multiple damper bars divided in the circumferential direction, it is possible to improve the machining accuracy of the damper bar, which is the previous step required for diffusion bonding. In that amount, the thickness of the damper bar can be accurately processed according to the gap between the outer damper supports, so that inside the normal temperature damper,
The clearance between the outer diameter and the damper support can also be reduced. Therefore, the stator outer cylinder having a three-layer structure with a small clearance can be firmly bonded by diffusion bonding.

Therefore, the joining strength between the three layers of the rotor outer cylinder having such a three-layer structure becomes high, and the mechanical strength is high, and the peeling occurring on the joining surface is surely prevented even when centrifugal force or electromagnetic force is applied. It is possible to provide a rotor of a superconducting rotating electric machine having excellent performance and reliability, and a method for manufacturing the rotor.

[Brief description of drawings]

FIG. 1 is an axial sectional view showing a first embodiment of a rotor outer cylinder before diffusion bonding in a rotor of a superconducting rotary electric machine according to the present invention.

FIG. 2 is a cross-sectional view showing the rotating outer cylinder of FIG. 1 in a radial cross section.

FIG. 3 is a radial cross-sectional view showing a rotor outer cylinder of a second embodiment of the present invention.

FIG. 4 is an end view of the damper bar used in FIG.

5 is an end view showing another configuration example of the damper bar used in FIG.

FIG. 6 is an axial sectional view showing a room temperature damper in a rotor outer cylinder of a third embodiment of the present invention.

7 is an axial cross-sectional view showing another configuration example of the room temperature damper used in FIG.

FIG. 8 is an axial sectional view showing a damper bar in a rotor outer cylinder of a fourth embodiment of the present invention.

FIG. 9 is a partial view showing a room temperature damper in a rotor outer cylinder of a fifth embodiment of the present invention in a developed state.

FIG. 10 is a radial end view showing the rotor outer cylinder of the embodiment.

FIG. 11 is a partial view of a radial end surface of a rotor outer cylinder showing a sixth embodiment of the present invention.

FIG. 12 is a radial end view of a rotor outer cylinder showing a seventh embodiment of the present invention.

FIG. 13 is a partial view of a radial end of a rotor outer cylinder before diffusion bonding showing an eighth embodiment of the present invention.

FIG. 14 is a partial view of a radial end surface of a rotor outer cylinder after diffusion bonding showing a ninth embodiment of the present invention.

FIG. 15 is an axial sectional view showing a rotor of a conventional typical superconducting rotating electric machine.

16 is a radial cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

2 ... End axis, 3 ... Liquid helium, 4 ... Rotor inner cylinder, 5 ... Trok tube, 6 ... Heat shrink absorber, 7 ...
… Coil groove, 8… Superconducting coil, 9… Wedge, 10…
Insulator, 11 ... Superconducting coil end part, 12 ... Retaining ring, 13 ... Central rotating tube, 14 ... Radiation shield, 15
...... Mounting seat, 21 ...... Rotor outer cylinder, 21a ...... Room temperature damper, 21b ...... Inner damper support, 21c ...... Outer damper support, 21a1a to 21a8a ...... Damper bar.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Mayumi Yamamoto, 2-4, Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa, Toshiba Keihin Office (72) Inventor Jun Shibuya, 2-suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa No. 4 Toshiba Corporation Keihin Office

Claims (9)

[Claims] 1. A cooling medium in a rotor outer cylinder having a three-layer structure in which a room temperature damper made of a conductive member is sandwiched and integrated from the outer diameter side and the inner diameter side by inner and outer supports made of a high-strength non-magnetic member. Is provided coaxially with a rotor inner cylinder that accommodates
In a rotor of a superconducting rotary electric machine, in which torque tubes provided at both ends thereof are attached to a rotor outer cylinder,
A rotor for a superconducting rotating electric machine, characterized in that the room temperature damper constituting the rotor outer cylinder is constituted by a plurality of circumferentially divided damper members. 2. The rotor for a superconducting rotating electric machine according to claim 1, wherein the room temperature damper has a damper-bar side surface overlapped between a plurality of damper bars divided in the circumferential direction. 3. The room temperature damper is provided with a plurality of circumferentially divided damper bars and a ring-shaped short-circuit ring for short-circuiting both ends of the damper bar. Superconducting rotating electric machine rotor. 4. The superconducting material according to claim 1, wherein the room temperature damper comprises a plurality of circumferentially divided damper bars, which are divided into two in the radial direction, and the divided surfaces are tapered in the axial direction. Rotor of rotating electric machine. 5. The rotor of a superconducting rotating electric machine according to claim 1, wherein the room temperature damper has a damper bar side surface between a plurality of circumferentially divided damper bars, which is tapered in the axial direction. . 6. The normal temperature damper is formed into two layers in the radial direction, and a plurality of circumferential side-divided damper-bar side surfaces are displaced in the circumferential direction between the inner layer and the outer layer. A rotor for a superconducting rotating electric machine according to Item 1. 7. The rotor for a superconducting rotary electric machine according to claim 1, wherein the room temperature damper uses two or more kinds of materials for a plurality of damper bars divided in the circumferential direction. 8. A method for manufacturing a rotor of a superconducting rotating electric machine, wherein a cylinder of an outer support is arranged in a high-strength non-magnetic member with a room-temperature damper made of a conductive member interposed therebetween to form a three-layer structure rotor. A superconducting device, characterized in that a damper is formed by a plurality of divided damper bars, these damper bars are inserted between the inner damper support and the outer damper support, and then integrated with the inner and outer damper supports by diffusion bonding. A method for manufacturing a rotor of a rotating electric machine. 9. The method for manufacturing a rotor of a superconducting rotary electric machine according to claim 1, wherein the thickness of the inner damper support is made larger than the thickness of the outer damper support.