JP3201858B2 - Superconducting coil testing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention winds a superconducting conductor
The present invention relates to a test device for performing a fatigue test of a superconducting coil formed by being wound around a shaft .

[0002]

2. Description of the Related Art As a superconducting coil , for example, a conductor formed by forming a required number of thin superconducting wires in which a niobium titanium filament is embedded in stabilized copper, pressing and forming a flat wire is used. in not reached until superconducting wires are mutually metallurgically bonded. Therefore, super
When a stress is repeatedly applied to this superconducting coil due to starting and stopping of the superconducting generator using the conducting coil ,
Problems such as disconnection of the superconducting wires and shape stability of the conductor occur.

For this reason, the superconducting coil device (real machine)
Super- conductor with the same cross-sectional configuration as the superconducting conductor used for the conductive coil
To prepare a conductive conductors, superconducting co using this superconducting conductor
At yl fatigue testing (superconducting coil can remain superconducting state cryogenic, the repeated stress added to the superconducting coil (for example, repeated stress of 3 Kg / mm ² 10,000
Times added), its mechanical strength and AC loss and examining the change in the quench performance test) by performing, by devising a variety of winding such superconducting conductors in actual Based on the test results, the superconducting coil superconducting It is necessary to prevent disconnection of the wire, deformation of the conductor, and the like. Therefore, various test devices have been manufactured, and various types of superconducting coil fatigue tests have been performed.

FIG. 5 is a perspective view of a main part of a conventional superconducting coil testing apparatus as described above, and FIG. 6 is a partial sectional view of the testing apparatus. In the drawing, reference numeral 1 denotes a winding portion 1a
Shorter at one end winding shaft of the step portion 1b is formed an insulating circular cylindrical projecting outwardly, 2 have a state (the thickness direction of the flat-wise to the winding portion 1a winding shaft 1 Side is wound in the radial direction of the winding part 1a) and the superconducting coil for the test is wound in a single stage in a solenoid shape.
Ill . The superconducting coil 2 for this test has a cross-sectional configuration (number of superconducting wires, material, etc.) and cross-sectional size.
It is the same as the actual superconducting coil . Numeral 3 is attached to the other end of the winding portion 1a of the winding shaft 1 in a fitted state, reciprocates in the axial direction of the winding shaft 1, and is wound around the winding portion 1a by the pressurizing portion 3a. Superconductivity
An insulating movable shaft that repeatedly presses the entire coil 2 toward the step portion 1b.

Next, the operation of the superconducting coil testing apparatus will be described. First, a test device for a superconducting coil composed of a winding shaft 1, a superconducting coil 2, a movable shaft 3, and the like is immersed in, for example, cryogenic liquid helium (liquefaction temperature of 4.2 ° K) to bring the superconducting coil 2 into a superconducting state. And Then reciprocated at predetermined time intervals the movable shaft 3 with respect to the winding shaft 1, with repeated pressurization compress the sides of the superconducting coil 2 with a constant force by the pressing portion 3a, this superconductor
A predetermined amount of current is supplied to the coil 2 and the superconducting coil 2
The changes in mechanical strength, AC loss, quenching performance, etc. are examined. And, based on the obtained data, the superconducting coil
Research on how to wind superconducting coils in equipment (actual equipment).

[0006]

SUMMARY OF THE INVENTION However, the conventional
Since the superconducting coil testing device is configured as described above, the movable shaft 3 applies a fixed load to the superconducting coil 2 wound one step in a flatwise manner around the winding portion 1a of the winding shaft 1. When pressure is applied, the superconducting coil
The pressing force is received by the step portion 1b, and the center portion in the width direction (long side of the cross section) is deformed so as to protrude outward.
A force acting on the superconducting coil 2 moves in the radial direction of the winding shaft 1. Therefore, as shown in FIG. 7, a part of the superconducting coil 2 moves in the radial direction of the winding shaft 1 so that the solenoid state is not maintained, and it is not possible to simulate the pressurized state in the actual machine, resulting in fatigue. There was a problem that the purpose of the test could not be achieved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a superconducting coil which does not cause any inconvenience even when a predetermined force is applied from the side of the superconducting coil wound flatwise. It is intended to provide a test device.

[0008]

SUMMARY OF THE INVENTION The present invention, and a stepped portion provided in the circumferential direction of the winding portion cross section circular and on one end side of the winding portion is protruded radially outward, super Electric
A winding in which a conductor is wound around the winding portion in a solenoid shape
And attached shaft, reciprocally movably mounted in the axial direction of the take--out put shaft on the other end side of the winding unit, the winding unit
Superconducting coil formed by winding the superconducting conductor around
The cover and the movable shaft for pressurizing the step portion side, the outer peripheral surface of the wound in the winding <br/> only part of the winding shaft superconducting coil, the movable shaft
And a benzalkonium yl movement preventing means to prevent movement of the radially side of the superconducting coil is wound around shaft upon pressurization by
It is a thing . Further, the coil movement preventing means may be a binder.
The tape is composed of a superconducting coil.
Of the superconducting coil wound around
The movement of the opposite side is prevented. Also,
Film between the binding tape and the superconducting coil.
And the bind tape contains a curable resin in the tape base material.
It is configured to be immersed. Also, the winding shaft
A groove extending in the axial direction is formed on the outer surface of the winding shaft in a circumferential direction.
Are provided in plurality.

[0009]

When performing a fatigue test on a superconducting coil , the winding
A superconducting coil wound around the winding shaft
After the superconducting state the electrical coil is cooled, the superconductor co
Stepped portion by <br/> Ri repeatedly pressurized to the movable shaft towards the winding axis side of yl to generate repeated compression stress to the superconducting coil. Then, in this state, the measurement of the mechanical strength and the like of the superconducting coil is performed. In this case, the superconducting coil
Since Le is being wound in the form of flatwise the winding portion of the winding shaft, if Assure pressurized the stepped portion side of the winding shaft this superconducting coil, the superconducting coil, the superconducting co
Although force to move in the radial direction of the winding shaft yl occurs, the diameter of this for superconducting coil outer peripheral surface thereof is covered with a coil moving preventing means, the winding shaft by the coil movement preventing means Movement to the direction side is suppressed. Therefore, in this test apparatus, a repetitive compressive stress on the step portion side can be continuously applied to the superconducting coil . Also, the coil movement preventing means is made of bind tape.
The binding tape is
By winding the superconducting coil around the outer periphery
Movement of the shaft in the radial direction can be easily prevented. Ma
The film is between the bind tape and the superconducting coil
The binder tape is interposed and the hardening resin
It is constituted by impregnating fat. So, bind
By curing the curable resin after winding the
The radial movement of the conductive coil can be reliably prevented. Soshi
And the curable resin of the bind tape
It does not adhere to the conductive coil, and the pressing force is
Superconducting coil with little transmission to small number of films
Transmitted to Le. As a result, the superconducting coil has
Appropriate stress depending on pressure can be generated.
A groove extending in the axial direction of the winding shaft is provided on the winding shaft.
Liquid helicopter is provided on the outer surface of the
Coolant contacts the inner surface of the superconducting coil through the groove
In addition, the cooling performance of the superconducting coil can be improved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Embodiment 1 FIG. FIG. 1 is a partial sectional view of a superconducting coil testing apparatus according to an embodiment of the present invention. In addition, as shown in FIG. 5 and FIG.
The same or corresponding portions as those of the superconducting coil testing device are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 1, reference numeral 10 denotes a coil wound around the winding portion 1a of the winding shaft 1 so as to cover the outer peripheral surface of the coil 2, and the superconducting coil 2 is firmly wound on the outer peripheral surface of the winding portion 1a of the winding shaft 1. It is a bind tape as a coil movement preventing means for holding and fixing. The bind tape 10 is made of, for example, a thin strip of insulating glass tape made of glass fiber.

Next, the operation of the superconducting coil testing apparatus will be described in relation to the bind tape 10. A super-structure composed of a winding shaft 1, a superconducting coil 2, a movable shaft 3, and the like.
The test device of resistive coils immersed in liquid helium, super conductive
After the conductive coil 2 is brought into the superconducting state, the movable shaft 3 is reciprocated with respect to the winding shaft 1, and the pressing portion 3 a is repeatedly pushed on the side surface of the superconducting coil 2 wound around the winding portion 1 a of the winding shaft 1. Hit it. As a result, the pressing force of the movable shaft 3 is transmitted in the width direction of the superconducting coil 2 disposed adjacent to the winding portion 1a of the winding shaft 1 and adjacent to each other.
The superconducting coil 2 is compressed in the width direction, the superconducting co
The compressive stress is repeatedly generated in the file 2.

In this case, the superconducting coil 2 is wound in the form of a solenoid in a flat-wise state in the form of a solenoid.
a, the pressure applied by the movable shaft 3 is
In addition to compressing the superconducting coil 2 in the width direction, the superconducting coil 2 is wound and moved to the radial side of the shaft 1. However, the bind tape 10 is wound around the outer peripheral surface of the superconducting coil 2, and this bind tape 1
Since 0 attempts to hold the superconducting coil 2 on the outer surface of the winding portion 1a of the winding shaft 1, deformation and movement of the superconducting coil 2 in the radial direction of the winding shaft 1 due to the pressing force of the movable shaft 3 are restricted. . As a result, the pressing force of the movable shaft 3 is transmitted only in the width direction of the superconducting coil 2 along the axial direction of the winding shaft 1.

Therefore, the superconducting coil testing apparatus is used to superimpose the pressurized state in an actual machine with high accuracy.
The stress can be repeatedly applied to the conducting coil 2 a required number of times, and during this time, data such as the mechanical strength, AC loss, and quench performance of the superconducting coil 2 can be sufficiently collected. Then, based on this data, the actual superconducting coil
Research on the proper winding method of superconducting coil in the device .

Embodiment 2 FIG. FIG. 2 is a partial sectional view of a superconducting coil testing apparatus according to another embodiment of the present invention. In the figure, 11 is a superconducting core.
Between the file 2 and the bind tape 10 as shown in the figure.
A small insulating polymer film frictional resistance which is inserted to. In the second embodiment, the bind tape 10 and the polymer film 11 are integrated to form a coil movement preventing means, and other configurations are the same as those of the superconducting coil testing apparatus of the first embodiment.

When an insulating tape impregnated with a curable resin is used as the bind tape 10, the bind tape 10
Resin adheres to the outer surface of the superconducting coil 2. Therefore, when a pressing force is applied to the superconducting coil 2 via the movable shaft 3, this pressing force is transmitted not only to the superconducting coil 2 but also to the bind tape 10 side, and an appropriate repetitive stress is generated in the superconducting coil 2. It will be difficult.

Therefore, the polymer film 11 is first wound around the outer peripheral surface of the superconducting coil 2 and the outer surface of the superconducting coil 2 is covered with the polymer film 11.
A bind tape 10 in which an insulating tape is impregnated with a curable resin is wound around the outer surface of the tape 1 and the bind tape 10 is cured.

[0018] Thus, the resin of the bind tape 10 to cure and adhere to the polymer film 11 side, a superconducting
Even if a pressing force is applied to the coil 2 via the movable shaft 3, this pressing force is hardly transmitted to the polymer film 11 having a small coefficient of friction, but is transmitted to the superconducting coil 2 as it is. Therefore, the same effect as in the first embodiment can be obtained in the second embodiment.

Embodiment 3 FIG. FIG. 3 shows a superconducting coil according to still another embodiment of the present invention.
Is a partial cross-sectional view of the test device, FIG 4 is a partial perspective view of the winding shaft 1. In the drawing, reference numeral 12 denotes a coolant flow channel provided on the surface of the winding portion 1a of the winding shaft 1 and inside the step portion 1b in the axial direction of the winding shaft 1. The coolant flow channel 12 has a substantially V-shaped cross section, and a plurality of the coolant flow channels 12 are provided at a predetermined pitch in the circumferential direction of the winding portion 1a. The other configuration is the same as that of the superconducting coil testing apparatus of the first embodiment.

As described above, the refrigerant flow channel 1
2, the winding portion 1 of the winding shaft 1
a superconducting coil 2 is wound around a
After 0 and the wound, when immersed test device this in liquid helium, liquid helium through the refrigerant flow path groove 12 super
It easily reaches the inner surface side of the conductive coil 2. Therefore,
In test device this can be sufficiently contacted with the superconducting coil 2 to the liquid helium, it is possible to improve the cooling of the superconducting coil 2, to maintain the superconducting state of the superconducting coil 2 stably be Can be. In the third embodiment as well, the outer peripheral surface of the superconducting coil 2 is covered with the same bind tape 10 as in the first embodiment, and the same effects as in the first embodiment can be obtained.

In each of the above embodiments, the bind tape 10 is used as the coil movement preventing means.
The material is not limited to a material having magnetism and may be any material having an insulating property.

[0022]

According to apparent this invention from the above description, the winding unit cross section circular and is protruded on one end side of the winding portion <br/> radially outward provided on the circumferential direction Is
And the superconducting conductor has a solenoid
A winding shaft wound on de-like, winding-out put unit reciprocate seated in its other end in the axial direction of the winding axis of the
The superconducting conductor is formed by winding the superconducting conductor around the winding portion.
A movable shaft which the superconducting coil is pressurized to the step portion side, wound
Covers the outer peripheral surface of the superconducting coil wound around the winding portion of the attaching shaft , and the superconducting coil is wound when pressurized by the movable shaft.
Since a Turkey yl movement preventing means to prevent the movement in the radial direction of the attaching shaft, even by adding a predetermined force to the side of the superconducting coil wound in the form of flatwise, this
The winding around the superconducting coil does not move in the radial direction of the shaft , and the force from the movable shaft is applied to this superconducting coil in the axial direction .
It can be for work, accurately simulating a pressurized state of the actual machine
I can imitate . In addition, the coil movement prevention means
Bind tape, so that
The superconducting coil is wound around the superconducting coil to
To easily prevent radial movement of the winding shaft of the
Can be. Also, the film is made of bind tape and superconducting core.
Between the tape base and the tape.
It is made by impregnating a hardening resin into the material.
The movement of the winding axis of the conducting coil in the radial direction is reliably suppressed.
Is, the pressure does not act on Baindote flop, the superconducting coil
In this case, an appropriate pressing force can be applied accurately. Ma
The groove extending in the axial direction of the winding shaft is
Since a plurality of coils are provided on the outer surface in the circumferential direction,
The cooling performance of the nozzle can be improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a superconducting coil testing apparatus according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a superconducting coil testing apparatus according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view of a test device for a superconducting coil according to a third embodiment of the present invention.

FIG. 4 is a perspective view around a winding axis of a superconducting coil testing apparatus according to a third embodiment of the present invention.

FIG. 5 is a perspective view of a main part of a conventional superconducting coil testing apparatus.

FIG. 6 is a partial sectional view of a conventional superconducting coil testing apparatus.

FIG. 7 is an explanatory diagram of a problem of a conventional superconducting coil testing apparatus.

[Explanation of symbols]

1 winding shaft , 1a winding part, 1b step part, 2
Superconducting coil , 3 movable shafts , 10 bind tape (coil movement prevention means), 11 polymer film (coil movement prevention means) , 12 refrigerant flow channel .

Claims (4)

(57) [Claims] 1. A winding portion having a circular cross section and the winding portion
It is projected to only part one end radially outwardly of the provided with circumferentially
And a resulting stepped portion, which superconductor is in the winding unit
A winding shaft wound around maytansinoid shape, reciprocally movable to pick up the axial direction of the winding shaft on the other end of the winding portion
The superconducting conductor is wound around the winding portion.
Movable to press the superconducting coil formed in the step part side
Covering a shaft, the outer peripheral surface of said superconducting coil wound around the winding portion of the winding shaft, that to prevent the superconducting coil to pressurization by said movable shaft to move in the radial direction of the winding shaft the test apparatus of the superconducting coil, characterized in that a co-yl movement preventing means. 2. The coil movement preventing means is a bind tape.
And the bind tape is wound around the outer periphery of the superconducting coil.
Turned to move the superconducting coil in the radial direction of the winding shaft
2. The method according to claim 1, wherein
Testing equipment for superconducting coils. 3. A film comprising a bind tape and a superconducting coil.
Between the tape base and the tape base material.
Is characterized by being impregnated with a curable resin.
The superconducting coil testing device according to claim 2. A groove extending in the axial direction of the winding shaft;
That the outer surface of the mounting shaft is
4. A superconducting coil according to claim 1, wherein
Testing equipment.