JPH07222431A - Rotor for superconducting rotating electric machine - Google Patents

Abstract

PURPOSE:To save the consumption of a refrigerant in a liquid reservoir part inside a winding mounting shaft. CONSTITUTION:A support piece 21 which protrudes to the outward direction is bonded to a midstream part 16b in a refrigerant discharge tube. A support- piece receiver member 22 which is faced with the support piece 21 is bonded to the inner circumferential face of an inside tube 4b for a winding mounting shaft. When a rotor is turned, the midstream part 16b in the refrigerant discharge tube is deformed elastically by a centrifugal action due to the own weight of the support piece 21, and the support piece 21 comes into contact with the support-piece receiver member 22.

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 rotating electric machine, and more particularly to a support structure for a pipe such as a refrigerant discharge pipe.

[0002]

2. Description of the Related Art FIG. 16 is a sectional view showing an example of a rotor of a conventional superconducting rotating electric machine. In the figure, 1 is a drive-side end shaft to which a rotational drive force is transmitted, 2 is a counter-drive-side end shaft that is provided to face the drive-side end shaft 1, and has a through hole 2b provided therein. Reference numeral 3 denotes a pair of torque tubes whose one ends are fixed to the flanges 1a and 2a of the drive-side and anti-drive-side end shafts 1 and 2, respectively. Cooler 3a which is a heat exchanger for removing heat input from the side end shafts 1, 2
have.

Reference numeral 4 denotes a hollow winding mounting shaft fixed between a pair of torque tubes 3. Inside the winding mounting shaft 4, a liquid reservoir 4a for liquid helium as a refrigerant is formed. There is. A metal inner cylinder 4b, which is a cylindrical member, is inserted into the winding mounting shaft 4. 5 is an end plate attached to both ends of the winding mounting shaft 4 so as to seal the liquid reservoir 4a, 6 is a superconducting field winding wound around the outer surface of the winding mounting shaft 4, and 7 is A helium outer cylinder attached to the winding mounting shaft 4 so as to cover the superconducting field winding 6,
Reference numeral 8 is a retaining ring attached to both ends of the outer circumference of the winding mounting shaft 4, 9 is a low temperature damper whose both ends are supported by a pair of torque tubes 3, and which covers the helium outer cylinder 7, 10 is both flanges at both ends. Torque tube 3 supported by 1a and 2a
And a normal temperature damper that covers the low temperature damper 9.

Reference numeral 11 denotes a bearing for rotatably supporting the drive-side and counter-drive-side end shafts 1 and 2, and 12 denotes a winding mounting shaft 4.
A side surface radiation shield is attached to the inner surface side of the torque tube 3 so as to face both end surfaces thereof, and 13 is a vacuum portion formed in the torque tube 3, the helium outer cylinder 7, and the low temperature damper 9.

Reference numeral 14 is a slip ring for supplying a field current provided on the end shaft 2 on the non-driving side. The slip ring 14 is connected to the superconducting field winding 6 via a current lead (not shown). It is electrically connected. Reference numeral 15 is a liquid reservoir 4a formed in the winding mounting shaft 4 for the refrigerant supplied from the outside.
Is a refrigerant supply pipe for supplying to the
It is arranged so as to pass through the through hole 2b of the non-driving side end shaft 2.

Reference numeral 16 is a cooler 3a for the refrigerant in the liquid reservoir 4a.
Is a refrigerant discharge pipe for discharging to the outside via the upstream portion 16a disposed between the end plate 5 and the cooler 3a, and the inner cylinder 4b of the winding mounting shaft 4. It is composed of a midstream portion 16b which is a pipe passing through the inside, and a downstream portion 16c which discharges the refrigerant to the outside through the inside of the through hole 2b. 17
Is a disc-shaped support body that connects and supports the refrigerant discharge pipe midstream portion 16b to the inner surface of the inner cylinder 4b of the winding mounting shaft 4.

Next, the operation will be described. When liquid helium, which is a refrigerant, is externally supplied to the liquid reservoir 4a of the winding mounting shaft 4 via the refrigerant supply pipe 15, the superconducting field winding 6 causes the liquid reservoir 4a to pass through the winding mounting shaft 4. It is cooled to a cryogenic temperature by the liquid helium inside, and its electrical resistance becomes zero. When a field current is supplied to the superconducting field winding 6 via the slip ring 14, the superconducting field winding 6 is excited and a strong magnetic field without excitation loss is generated.

In this state, when a rotational force from a turbine (not shown) or the like is transmitted to the drive-side end shaft 1 side, this rotational force is transmitted through the room temperature damper 10 or the like to the non-drive-side end shaft 2 side. The drive-side and anti-drive-side end shafts 1 and 2, which are also transmitted to the bearing 11, rotate in a predetermined direction around the rotation center axis. Then, the rotational force of the drive-side and anti-drive-side end shafts 1 and 2 is transmitted to the winding mounting shaft 4 via the torque tube 3 to rotate the superconducting field winding 6 at a constant speed. Therefore, AC electric power is generated on the side of a stator (not shown) provided outside the rotor by the rotor that rotates while generating a magnetic field in a predetermined direction.

Here, the heat transferred by heat conduction from the drive-side and non-drive-side end shafts 1 and 2 to the winding mounting shaft 4 side via the torque tube 3 is passed through the cooler 3a to the refrigerant discharge pipe 18. It is absorbed on the side of liquid helium (possibly gasified) inside. Further, the heat which is about to be transferred by convective heat transfer from the drive-side end shaft 1, the counter-drive-side end shaft 2, and the room temperature damper 10 side to the superconducting field winding 6 side is transferred to the vacuum unit 13.
In addition to being blocked by the side radiation shield 12 and the low-temperature damper 9, the heat which is about to be transmitted to the superconducting field winding 6 side by radiative heat transfer is also blocked.

Further, the room temperature damper 10 and the low temperature damper 9
Has a function of shielding the high-frequency magnetic field from the stator to protect the superconducting field winding 6 and also attenuating the rotor vibration due to the disturbance of the power system. Furthermore, as shown in FIG. 17, the middle portion 16b of the refrigerant discharge pipe is always connected to and supported by the inner cylinder 4b by the support member 17 that is in contact with the entire outer circumference of the middle portion 16b. Although it is prevented from being deformed due to such vibrations, heat is conducted from the relatively high temperature side refrigerant discharge pipe midstream portion 16b to the low temperature side inner cylinder 4b regardless of whether it is rotating or stationary. It also conducts to the reservoir 4a.

[0011]

In the rotor of the conventional superconducting rotating electric machine configured as described above, when rotating,
Since the heat is transferred to the liquid reservoir 4a from the medium discharge portion 16b of the refrigerant discharge pipe through the support body 17 and the inner cylinder 4b which are in contact with the entire outer circumference of the medium portion 16b regardless of the stationary state, a large amount of the refrigerant in the liquid reservoir 4a exists. Refrigerator for supplying refrigerant (not shown)
However, the operating efficiency of the rotating electric machine including the above becomes low, and a large capacity refrigerator is required.

The present invention has been made to solve the above-mentioned problems, and it is a superconducting device which can save the consumption of the refrigerant while ensuring the support of the pipes when the rotor rotates. The purpose is to obtain a rotor of a rotating electric machine.

[0013]

In the rotor of the superconducting rotating electric machine according to the invention of claim 1, at least a part of the pipe is displaced in the outer diameter direction by centrifugal action during rotation and is restored to its original position when stationary. And a supporting piece that mechanically supports the displaced portion of the pipe during rotation with respect to the inner peripheral surface of the tubular member, and the support piece between the pipe and the inner peripheral surface of the tubular member. It is provided so as to be non-contact in terms of heat conduction.

In the rotor of the superconducting rotating electric machine according to the second aspect of the present invention, at least a part of the refrigerant discharge pipe is displaced in the outer diameter direction by centrifugal action during rotation, and is restored to its original position when stationary. In addition, a support piece that mechanically supports the displaced portion of the refrigerant discharge pipe during rotation with respect to the inner peripheral surface of the inner cylinder has thermal conduction between the refrigerant discharge pipe and the inner peripheral surface of the inner cylinder. It is provided so as to be non-contact.

In the rotor of the superconducting rotary electric machine according to the third aspect of the present invention, the support piece is provided on the outer peripheral portion of the refrigerant discharge pipe so as to project in the outer diameter direction, and the refrigerant is discharged by the centrifugal action due to the weight of the support piece during rotation. The tube is elastically deformed.

In the rotor of the superconducting rotary electric machine according to the invention of claim 4, the support piece receiving member, which the support piece contacts by displacement during rotation, is projected in the inner diameter direction and is opposed to the support piece to form the inner cylinder. It is provided on the inner peripheral surface.

In the rotor of the superconducting rotary electric machine according to the invention of claim 5, a plurality of support pieces are provided at intervals in the axial direction of the refrigerant discharge pipe, and the adjacent support pieces are arranged in the circumferential direction of the refrigerant discharge pipe. It is provided at 180 ° intervals.

In the rotor of the superconducting rotating electric machine according to the invention of claim 6, the refrigerant discharge pipe is arranged so as to be displaced from the center of rotation in the radial direction, and the support piece is projected in the inner peripheral surface of the inner cylinder in the inner diameter direction. It was provided by.

[0019]

According to the first aspect of the present invention, when the rotor is stationary, the pipe and the tubular member are kept in non-contact with each other in a heat conductive manner to save the consumption of the refrigerant when the rotor is stationary. At least a part of the above is displaced by a centrifugal action, and the support piece of the necessary minimum heat conduction path cross section secures the support of the pipe and saves the consumption of the refrigerant.

According to the second aspect of the present invention, when the rotor is stationary, the refrigerant discharge pipe and the inner cylinder are made in non-contact with each other in a heat conductive manner to save the consumption of the refrigerant when stationary, and when the rotor is rotating,
At least a part of the refrigerant discharge pipe is displaced by centrifugal action, and the support piece having the minimum necessary heat conduction path cross section secures the support of the refrigerant discharge pipe while saving the consumption of the refrigerant.

In the third aspect of the invention, the consumption of the refrigerant in the liquid reservoir is saved by the simple structure in which the supporting piece is provided on the outer peripheral portion of the refrigerant discharge pipe.

According to the fourth aspect of the present invention, by providing the support piece receiving member on the inner cylinder side, the weight of the support piece applied to the refrigerant discharge pipe can be minimized.

According to the invention of claim 5, a plurality of support pieces are provided, and the support pieces adjacent to each other are arranged so as to be offset by 180 ° in the circumferential direction of the refrigerant discharge pipe. The weight distribution of the support piece becomes uniform, and the axial vibration characteristics of the rotor are improved.

In the sixth aspect of the invention, the support piece is provided only on the inner peripheral surface of the inner cylinder, and the support piece is not provided on the refrigerant discharge pipe, so that the consumption of the refrigerant in the liquid reservoir can be saved.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a sectional view of a rotor of a superconducting rotating electric machine according to a first embodiment of the present invention when the rotor is at rest.
6 and FIG. 17 are given the same reference numerals as in FIG.
The description is omitted.

In the figure, reference numeral 21 designates the middle portion 16 of the refrigerant discharge pipe.
It is a support piece that is attached to the outer peripheral portion of b so as to project in the outer diameter direction. A plurality of support pieces 21 are attached at intervals in the axial direction of the refrigerant discharge pipe 16b. Reference numeral 22 denotes a plurality of support piece receiving members mounted on the inner peripheral surface of the inner cylinder 4b so as to project in the inner diameter direction. The support piece receiving members 22 are spaced from each other by a predetermined distance. Are facing each other.

The support piece 21 and the support piece receiving member 22 are also provided.
Is made of, for example, an insulating material (plastic material or the like), and is adhered to the refrigerant discharge pipe midstream portion 16b and the inner cylinder 4b via an adhesive. Further, the refrigerant discharge pipe midstream portion 16b
Is made of a metal material, such as stainless steel, which is elastically deformable at extremely low temperatures. The overall structure of the rotor is almost the same as that of the conventional example shown in FIG.

In the rotor of such a superconducting rotating electric machine,
As shown in FIG. 1, since there is a gap between the support piece 21 and the support piece receiving member 22, the refrigerant discharge pipe midstream portion 16b and the inner cylinder 4b are in thermal contact with each other. Therefore, when the rotor is stationary, the heat of the vaporized refrigerant in the refrigerant discharge pipe midstream portion 16b is not conducted to the refrigerant in the liquid reservoir 4a (FIG. 16) outside the inner cylinder 4b, and the consumption of the refrigerant is saved. It

During rotation of the rotor, the refrigerant discharge pipe midstream portion 16b is subjected to a centrifugal action due to the weight of the support piece 21 and is elastically deformed. As a result, as shown in FIG. 2 and FIG.
The support piece 21 is displaced in the outer diameter direction so that the support piece receiving member 22
Abut. As a result, the refrigerant discharge pipe middle-flow portion 16b is mechanically supported on the inner peripheral surface of the inner cylinder 4b, and it is possible to prevent the refrigerant discharge pipe middle-flow portion 16b from generating minute vibrations due to rotation. Further, the contact area between the support piece 21 and the support piece receiving member 22 may be set to the minimum area required to support the refrigerant discharge pipe midstream portion 16b, which reduces the cross-sectional area of the heat conduction path. Also, the consumption of the refrigerant during rotation is saved.

Further, since the support piece receiving member 22 is attached to the inner peripheral surface of the inner cylinder 4b, the support piece 21 should have the minimum size necessary for deforming the refrigerant discharge pipe midstream portion 16b during rotation. And the refrigerant discharge pipe midstream portion 16b when stationary
It is possible to minimize the weight of the support piece 21 that is required. Furthermore, the support piece 21 is attached to the middle portion 16 of the refrigerant discharge pipe.
By attaching it to b, the refrigerant discharge pipe middle-flow portion 16b can easily exert a centrifugal action while being arranged at the center of rotation, and the refrigerant discharge pipe middle-flow portion 16b can be more reliably supported during rotation.

The space between the support piece 21 and the support piece receiving member 22 may be quite small as long as direct heat conduction can be avoided, and therefore the refrigerant discharge pipe midstream portion 16 is provided.
The amount of elastic deformation of b can be such that it does not easily break even if it is repeatedly deformed.

Example 2. Next, FIG. 4 is a sectional view of a rotor of a superconducting rotating electric machine according to a second embodiment of the present invention at rest, FIG. 5 is a sectional view of FIG. 4 during rotation, and FIG. 6 is V of FIG.
It is a sectional view taken along the line I-VI.

In the figure, reference numeral 23 designates the middle portion 16 of the refrigerant discharge pipe.
A support piece made of, for example, an insulator is attached to the outer peripheral portion of b so as to project in the outer diameter direction.
The tip portion faces the inner peripheral surface of the inner cylinder 4b at a predetermined interval. In addition, in the second embodiment, the support piece 2
3 extends in the outer diameter direction more than the support piece 21 of the first embodiment, and therefore the support piece receiving member 22 is provided on the inner peripheral surface of the inner cylinder 4b.
There is no such protrusion. Other parts are the same as those in the first embodiment.

In the rotor of such a superconducting rotary electric machine,
When stationary, there is a gap between the support piece 23 and the inner peripheral surface of the inner cylinder 4b, so that the refrigerant discharge pipe midstream portion 16b and the inner cylinder 4b are in non-contact in a heat conductive manner, and the consumption of the refrigerant is saved. . Further, when the rotor rotates, the refrigerant discharge pipe middle-flow portion 16b is elastically deformed by the centrifugal force due to the weight of the support piece 23, and as shown in FIGS. Since it is mechanically supported by the heat conduction path cross-sectional area of
Micro-vibration of the refrigerant discharge pipe midstream portion 16b during rotation is prevented and the consumption of the refrigerant is saved. Furthermore, since it is not necessary to provide a protrusion on the inner cylinder 4b side only by attaching the support piece 23 to the refrigerant discharge pipe midstream portion 16b, the structure is simple and the manufacturing is easy.

In the first and second embodiments, the support piece 21,
Although the example in which 23 and the support piece receiving member 22 are adhered by an adhesive is shown, they may be provided by other methods. In addition, in the above-mentioned Example 1,
2, the support pieces 21 and 23 are provided in plural, but if the refrigerant discharge pipe midstream portion 16b can be supported during rotation, the support pieces 21 and 23 are provided.
3 may be one.

Example 3. Next, FIG. 7 is a sectional view of a rotor of a superconducting rotary electric machine according to a third embodiment of the present invention at rest, FIG. 8 is a sectional view of FIG. 7 during rotation, and FIG. 9 is I of FIG.
It is an X-IX line sectional view.

In the figure, reference numerals 24 and 25 denote first and second support pieces made of, for example, an insulator, which are attached to the outer peripheral portion of the refrigerant discharge pipe midstream portion 16b so as to project in the outer radial direction at intervals in the axial direction. And these support pieces 24, 25 are
The refrigerant discharge pipes are provided at intervals of 180 ° in the circumferential direction of the midstream portion 16b. 26 and 27 are each support piece 2
It is a support piece receiving member made of, for example, an insulator, which is attached to the inner peripheral surface of the inner cylinder 4b so as to face 4,4 and 25. Other parts are the same as those in the first embodiment.

In the rotor of such a superconducting rotary electric machine,
At rest, each support piece 24, 25 and each support piece receiving member 2
Since there is a gap between the refrigerant discharge pipe 6 and 27,
6b and the inner cylinder 4b do not come into contact with each other in heat conduction, and the consumption of the refrigerant is saved. Further, when the rotor rotates, the support piece 2
The refrigerant discharge pipe middle-flow portion 16b is subjected to centrifugal action and elastically deformed by its own weight, and as shown in FIGS. 8 and 9, the refrigerant discharge pipe middle-flow portion 16b mechanically has a minimum necessary heat conduction path cross-sectional area. Since it is supported, minute vibration of the refrigerant discharge pipe midstream portion 16b during rotation is prevented, and consumption of the refrigerant is saved. Further, since the support pieces 24, 25 and the support piece receiving members 26, 27 are arranged so that the weight distribution around the rotation center is uniform, the axial vibration characteristics of the rotor are kept good.

In the third embodiment, the two support pieces 2 are used.
4, 25 are shown, but three or more may be provided, and in this case, it is preferable that the supporting pieces adjacent to each other are provided at 180 ° intervals in the circumferential direction of the refrigerant discharge pipe midstream portion 16b.
If the weight distribution around the center of rotation becomes uniform as a whole,
It is not always necessary to alternate one by one in the opposite direction.

Example 4. Next, FIG. 10 is a sectional view of a rotor of a superconducting rotating electric machine according to a fourth embodiment of the present invention at rest, FIG. 11 is a sectional view of FIG. 10 during rotation, and FIG. 12 is XII- of FIG. It is a XII sectional view.

In the figure, reference numerals 28 and 29 denote first and second support pieces made of, for example, an insulator, which are attached to the outer peripheral portion of the middle portion 16b of the refrigerant discharge pipe so as to project in the outer radial direction at intervals in the axial direction. And these supporting pieces 28, 29 are
The refrigerant discharge pipes are provided at intervals of 180 ° in the circumferential direction of the midstream portion 16b. In addition, in the fourth embodiment, the support pieces 28, 29 are extended in the outer diameter direction more than the support pieces 24, 25 of the third embodiment, so that the support piece receiving member is provided on the inner peripheral surface of the inner cylinder 4b. No protrusions such as 26 and 27 are provided. Other parts are the same as those in the third embodiment.

In the rotor of such a superconducting rotary electric machine,
As in the case of the third embodiment, it is possible to save the consumption of the refrigerant at the time of standstill and at the time of rotation while ensuring the support of the refrigerant discharge pipe midstream portion 16b at the time of rotation, and to keep the shaft vibration characteristics of the rotor good. Be drunk Further, similarly to the second embodiment, since it is not necessary to provide a protrusion or the like on the inner peripheral surface side of the inner cylinder 4b, the structure is simple and the manufacturing is easy.

Example 5. Next, FIG. 13 is a cross-sectional view of a rotor of a superconducting rotary electric machine according to a fifth embodiment of the present invention at rest, FIG. 14 is a cross-sectional view of FIG. 13 at the time of rotation, and FIG. 15 is XV- of FIG. It is a XV line sectional view.

In the figure, reference numeral 30 denotes a plurality of support pieces made of, for example, an insulator, which are attached to the inner peripheral surface of the inner cylinder 4b so as to project in the inner diameter direction.
The cross-sectional shape of the front end surface of the is a circular arc shape along the outer peripheral shape of the refrigerant discharge pipe midstream portion 16b. Further, the refrigerant discharge pipe midstream portion 16b is arranged so as to be radially displaced from the rotation center toward the support piece 30 side.

In the rotor of such a superconducting rotating electric machine,
At rest, since there is a space between the middle portion 16b of the refrigerant discharge pipe and the support piece 30, the middle portion 16b of the refrigerant discharge pipe and the inner cylinder 4
It is in non-contact with b in heat conduction, and the consumption of the refrigerant is saved. Further, during rotation of the rotor, the medium portion 16b of the refrigerant discharge pipe, which is arranged displaced from the center of rotation, is displaced by centrifugal action as shown in FIGS. 14 and 15, and the machine has a minimum necessary heat conduction path cross-sectional area. Since it is supported, the minute vibration of the refrigerant discharge pipe midstream portion 16b during rotation is prevented and the consumption of the refrigerant is saved.

Further, in the fifth embodiment, since the support piece 30 is simply attached to the inner cylinder 4b and no protrusions or the like are required on the side of the refrigerant discharge pipe midstream portion 16b, the structure is simple and the manufacture is easy. In addition, the refrigerant discharge pipe midstream portion 1 when stationary
6b does not receive the load of the support piece 30.

In each of the above-mentioned embodiments, the cooling discharge pipe midstream portion 16b is used as the pipe, and the winding mounting shaft 4 is used as the tubular member.
Although the inner cylinders 4b of the above are shown, as long as conduction heat transfer occurs between the inner cylinder 4b and the tubular member and the refrigerant is consumed by the conduction heat transfer, this pipe is also used for supporting other pipes. The invention can be applied.

[0048]

As described above, in the rotor of the superconducting rotary electric machine according to the invention of claim 1, at least a part of the pipe is displaced in the outer diameter direction by the centrifugal action during the rotation, and is at the original position when it is stationary. Between the pipe and the inner peripheral surface of the tubular member, a support piece that mechanically supports the displaced portion of the pipe during rotation on the inner peripheral surface of the tubular member is provided. Since it was installed so as to be non-contact in terms of heat conduction,
It is possible to support the pipe with the minimum required heat conduction path cross section only during rotation, and to reduce the consumption of the refrigerant.

Further, in the rotor of the superconducting rotating electric machine according to the second aspect of the invention, at least a part of the refrigerant discharge pipe is displaced in the outer diameter direction by centrifugal action during rotation, and is restored to the original position when stationary. In addition, a support piece that mechanically supports the displaced portion of the refrigerant discharge pipe at the time of rotation to the inner peripheral surface of the inner cylinder is provided between the refrigerant discharge pipe and the inner peripheral surface of the inner cylinder. Since it is installed so as to be conductively non-contact, it is possible to support the refrigerant discharge pipe with the minimum necessary heat conduction path cross section only during rotation, saving the consumption of refrigerant in the liquid reservoir inside the winding mounting shaft. There is an effect that can be done.

Further, in the rotor of the superconducting rotating electric machine according to the third aspect of the present invention, the support piece is provided on the outer peripheral portion of the refrigerant discharge pipe so as to project in the outer diameter direction, and the refrigerant is centrifugally generated by the weight of the support piece during rotation. Since the discharge pipe is elastically deformed, in addition to the same effect as the invention of claim 2, the refrigerant discharge pipe can easily exert a centrifugal action during rotation,
The refrigerant discharge pipe can be more reliably supported during rotation.

Furthermore, in the rotor of the superconducting rotary electric machine according to the invention of claim 4, the support piece receiving member, which the support piece contacts by displacement during rotation, is projected in the inner diameter direction and is opposed to the support piece. Since it is provided on the inner peripheral surface of the cylinder, in addition to the same effect as the invention of claim 3, the supporting piece can be made to have a necessary minimum size, and the weight of the supporting piece on the refrigerant discharge pipe is reduced. There is an effect that can be done.

In the rotor of the superconducting rotary electric machine according to the invention of claim 5, a plurality of support pieces are provided at intervals in the axial direction of the refrigerant discharge pipe, and the adjacent support pieces are in the circumferential direction of the refrigerant discharge pipe. In addition to the effect similar to that of the invention of claim 3, the weight distribution of the supporting piece around the rotation center becomes uniform when the rotor rotates, and the shaft vibration characteristics of the rotor are increased. There is an effect that can keep good.

Further, in the rotor of the superconducting rotating electric machine according to the invention of claim 6, the refrigerant discharge pipe is arranged so as to be displaced in the radial direction from the center of rotation, and the supporting piece projects in the inner peripheral surface of the inner cylinder in the inner diameter direction. Since it is provided in such a manner, in addition to the same effect as that of the invention of claim 2, consumption of the refrigerant in the liquid reservoir can be saved without providing a supporting piece on the refrigerant discharge pipe, and the refrigerant discharge pipe at rest is provided. The effect that the load of the supporting piece applied to the can be eliminated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rotor of a superconducting rotating electric machine according to a first embodiment of the present invention when the rotor is at rest.

FIG. 2 is a sectional view of FIG. 1 during rotation.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view of a rotor of a superconducting rotary electric machine according to a second embodiment of the present invention at rest, when the rotor is stationary.

FIG. 5 is a sectional view of FIG. 4 during rotation.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a sectional view of a rotor of a superconducting rotary electric machine according to a third embodiment of the present invention at rest, when the rotor is stationary.

FIG. 8 is a sectional view of FIG. 7 during rotation.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a sectional view of a rotor of a superconducting rotating electric machine according to a fourth embodiment of the present invention at rest, showing the essential parts thereof.

FIG. 11 is a sectional view of FIG. 10 during rotation.

12 is a sectional view taken along line XII-XII in FIG.

FIG. 13 is a sectional view of a rotor of a superconducting rotary electric machine according to a fifth embodiment of the present invention when the rotor is at rest.

14 is a cross-sectional view of FIG. 13 during rotation.

15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a sectional view showing an example of a rotor of a conventional superconducting rotating electric machine.

17 is a cross-sectional view of the inner cylinder of the winding mounting shaft of FIG.

[Explanation of symbols]

 4 Winding Attachment Shaft 4a Inner Cylinder (Cylindrical Member) 6 Superconducting Winding 16b Refrigerant Discharge Pipe Midstream (Piping) 21 Support Piece 22 Support Piece Receiving Member 23 Support Piece 24 First Support Piece 25 Second Support Piece 26 First support piece receiving member 27 Second support piece receiving member 28 First support piece 29 Second support piece 30 Support piece

Claims (6)

[Claims] 1. A tubular member cooled by a refrigerant,
A pipe which is arranged in the tubular member and has a temperature higher than that of the tubular member, at least a part of which is displaced in the outer diameter direction by centrifugal action during rotation and which is restored to its original position when stationary. , The pipe and the tubular member are provided between the pipe and the inner peripheral surface of the tubular member so as to be in non-contact with each other in a heat conductive manner, and the displaced portion of the pipe during rotation is the tubular shape. A rotor for a superconducting rotating electric machine, comprising: a support piece mechanically supporting the inner peripheral surface of the member. 2. The tubular member is an inner cylinder that is inserted into a winding mounting shaft to which a superconducting field winding is mounted, and a pipe is provided in the inner cylinder to form a refrigerant discharge path. The refrigerant discharge pipe is arranged, and is characterized by the above-mentioned.
The rotor of the superconducting rotating electric machine described. 3. The support piece is provided on the outer peripheral portion of the refrigerant discharge pipe so as to project in the outer diameter direction, and elastically deforms the refrigerant discharge pipe by a centrifugal action due to its own weight during rotation. The rotor of the superconducting rotating electric machine according to claim 2. 4. An inner peripheral surface of the inner cylinder is provided with a support piece receiving member that comes into contact with the support piece due to displacement during rotation and that projects toward the inner diameter and faces the support piece. The rotor of a superconducting rotating electric machine according to claim 3. 5. A plurality of support pieces are provided at intervals in the axial direction of the refrigerant discharge pipe, and adjacent support pieces are provided at 180 ° intervals in the circumferential direction of the refrigerant discharge pipe. The rotor for a superconducting rotating electric machine according to claim 3 or 4, wherein 6. The refrigerant discharge pipe is arranged to be displaced from the center of rotation in the radial direction, and the support piece is provided on the inner peripheral surface of the inner cylinder so as to project in the inner diameter direction. Item 2. A rotor for a superconducting rotating electric machine according to Item 2.