JP3329864B2 - Superconducting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting device, and more particularly to a superconducting device, such as a magnetic propulsion ship or a magnetic levitation train, which is mounted on a moving body and generates vibrations in a strong magnetic field during traveling. It relates to a superconducting device.

[0002]

2. Description of the Related Art Superconducting devices have been studied and developed for applications in various fields by making use of the characteristic of having zero electrical resistance.

If a superconducting coil constituting a superconducting device is energized and both ends thereof are short-circuited by a switch having a zero electric resistance (permanent current switch), the superconducting coil is supplied without supplying current from an exciting power supply. Has a circulating current. A superconducting coil in a permanent current state does not require an excitation power supply, and is suitable for an electromagnet on a vehicle above a magnetic levitation train or an electromagnet for a magnetic propulsion ship.

FIG. 6 shows a superconducting device mounted on a moving body such as a magnetic levitation train disclosed in Japanese Patent Laid-Open No. 57-35387.

In FIG. 1, reference numeral 1 denotes a superconducting coil. The superconducting coil 1 is immersed in a cryogenic refrigerant such as liquid helium and stored in a refrigerant tank 2. The superconducting coil 1 is connected to a permanent current switch 5 by a lead wire 8,
A power lead 7 connected to the permanent current switch 5 is connected to an external excitation / demagnetization power supply (not shown) as necessary.

The permanent current switch 5 is housed in a refrigerant box 6 filled with a refrigerant such as liquid helium. The refrigerant box 6 is attached to an end of the refrigerant tank 2.

[0007] The refrigerant system such as liquid helium is surrounded by a shield plate 3 for shielding radiant heat, and is entirely housed in a heat insulating vacuum tank 4. In addition, the said refrigerant tank 2
Are supported in the heat-insulating vacuum tank 4 by a heat-insulating load support (not shown).

[0008]

By the way, in the above configuration, the refrigerant tank 2 is supported by the adiabatic vacuum tank 4 by an adiabatic load support (not shown). It vibrates in response to it. Due to the vibration of the refrigerant tank 2, the permanent current switch 5 and the refrigerant box 6 also vibrate.

Generally, the permanent current switch 5 electrically connects a plurality of elements in parallel due to the limitation of the current capacity of the elements used. Therefore, structurally, it becomes an assembly of parallel elements. When the permanent current switch 5 receives mechanical vibration, frictional heat is generated inside the element and in an assembly part.

When the permanent current switch 5 or the refrigerant box 6 enters the operating frequency range in which resonance occurs, the frictional heat becomes large, and the evaporation of the refrigerant such as liquid helium increases and the permanent current switch 5 is quenched. There was a problem.

The present invention has been made in view of the above points,
The purpose thereof is to suppress the increase in evaporation of refrigerant such as liquid helium during traveling of the moving object and the occurrence of quench of the permanent current switch. It is another object of the present invention to provide a superconducting device in which a quench does not occur in a superconducting coil or a permanent current switch.

[0012]

According to the present invention, in order to achieve the above object, a permanent current switch for exciting and demagnetizing a superconducting coil is immersed in a refrigerant in order to suppress the oscillation of the permanent current switch. A refrigerant box to be housed is directly supported by an adiabatic load support from a vacuum chamber having less vibration than a refrigerant tank of liquid helium or the like.

[0013]

According to the present invention, since the permanent current switch and the refrigerant box containing the same are directly supported on the vacuum chamber via the heat-insulating load support, the vibration of the permanent current switch and the refrigerant box containing the same is provided. In addition, the above object can be achieved because the vibration can be greatly reduced, and the reduction of the vibration can suppress the increase in the evaporation of the refrigerant such as liquid helium and the occurrence of the quench of the permanent current switch.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The superconducting device of the present invention will be described below in detail with reference to the illustrated embodiment.

FIG. 1 and FIG. 2 show an embodiment of the superconducting device of the present invention. It is to be noted that the same reference numerals are used for the same components as those in the related art, and the description thereof is omitted, and only the portions related to the present invention will be described.

As shown in FIG. 1, in this embodiment, a refrigerant box 6 in which the permanent current switch 5 is immersed and stored in a refrigerant such as liquid helium is stored by immersing the superconducting coil 1 in a refrigerant such as liquid helium. The refrigerant tank 2 and the refrigerant box 6 are separated from each other by using a bellows 9 in a vacuum, and the refrigerant box 6 that houses the permanent current switch 5 is separated from the refrigerant tank 2 so that mechanical vibration is not applied as much as possible. The support of the refrigerant box 6 is supported by the vacuum vessel 4 using the load support 11, that is, the mass of the refrigerant box 6 is supported by the vacuum vessel 4 using the adiabatic load support 11.

With such a configuration, the permanent current switch 5 and the refrigerant box 6 are independently supported by the adiabatic load support 11, so that they are not affected by the vibration of the refrigerant tank 2 as in the prior art. And vibration can be greatly reduced.

Further, the size of the bellows 9 connecting the refrigerant tank 2 and the refrigerant box 6 is increased so that the position where the permanent current switch 5 is placed is separated from the strong magnetic field generated by the superconducting coil 1 so that the permanent current switch 5 is moved. When used in a place where the magnetic field is as low as possible, the critical current of the permanent current switch 5 can have a margin. This is because the critical current of the permanent current switch 5 increases as the magnetic field decreases.

In addition, by installing the heat-insulating load support 11 on the surface of the vacuum chamber 4 having relatively low vibration, the permanent current switch 5 and the vibration of the refrigerant box 6 accommodating the switch 5 can be greatly reduced. it can.

Therefore, according to the embodiment of the present invention, the reduction of the vibration has a great effect on increasing the evaporation of the refrigerant such as liquid helium and suppressing the quench of the permanent current switch 5.

Further, since the permanent current switch 5 can be installed in a place where the magnetic field is relatively low, there is an effect that the critical current of the permanent current switch 5 can have a margin.

Next, a second embodiment of the present invention is shown in FIG. The embodiment shown in the figure differs from the embodiment shown in FIGS. 1 and 2 in that the mounting position of the heat-insulating load support 11 is 90 degrees.
The refrigerant box 6 containing the permanent current switch 5 is supported from the surface of the vacuum chamber 4 by being shifted.

Also according to the present embodiment, there is a great effect on increasing the evaporation of the refrigerant such as liquid helium and suppressing the quench of the permanent current switch 5.

FIG. 4 shows a third embodiment of the present invention.
This embodiment shown in the figure is different from each of the above-described embodiments in that
The two adiabatic load supports 11 are used at right angles, and the refrigerant box 6 containing the permanent current switch 5 is supported from two surfaces of the vacuum chamber 4. And 2 of this vacuum chamber 4
By selecting the surface with less vibration, the permanent current switch 5 can be more firmly supported.

Also according to this embodiment, there is a great effect on increasing the evaporation of the refrigerant such as liquid helium and suppressing the quench of the permanent current switch 5.

FIG. 5 shows a fourth embodiment of the present invention.
This embodiment shown in the figure is different from each of the above-described embodiments in that
The adiabatic load support 11 is configured to support the refrigerant box 6 containing the permanent current switch 5 from both left and right sides of the vacuum chamber 4.

Also according to this embodiment, there is a great effect on increasing the evaporation of the refrigerant such as liquid helium and suppressing the quench of the permanent current switch 5.

[0028]

According to the superconducting device of the present invention described above, a refrigerant box for immersing and storing a permanent current switch for exciting and demagnetizing a superconducting coil in a refrigerant is provided via a heat insulating load support. The vibration of the permanent current switch and the refrigerant box containing the permanent current switch can be greatly reduced, and the reduction of the vibration increases the evaporation of the refrigerant such as liquid helium, and the permanent current switch. This has the effect of suppressing the occurrence of quench in the current switch.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a superconducting device of the present invention.

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG.

FIG. 3 is a sectional view of a main part showing another embodiment of the superconducting device of the present invention.

FIG. 4 is a partial sectional view showing still another embodiment of the superconducting device of the present invention.

FIG. 5 is a partial sectional view showing still another embodiment of the superconducting device of the present invention.

FIG. 6 is a sectional view of a main part showing a conventional superconducting device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Superconducting coil, 2 ... Refrigerant tank, 3 ... Shield plate, 4 ...
Vacuum chamber, 5: permanent current switch, 6: refrigerant box, 7: power lead, 8: lead wire, 9: bellows, 11: adiabatic load support.

Continued on the front page (72) Inventor Motoaki Terai 1-4-1 Meieki Station, Nakamura-ku, Nagoya City, Aichi Prefecture Inside Tokai Passenger Railway Co., Ltd. (72) Inventor Tetsuro Asahara 1-1-1, Meieki Station, Nakamura-ku, Nagoya City, Aichi Prefecture No. 4 Tokai Passenger Railway Co., Ltd. (72) Inventor Ikuo Oishi 1-1-4 Meiji Station, Nakamura-ku, Nagoya City, Aichi Prefecture Examiner, Tokai Passenger Railway Co., Ltd. Masayuki Ogawa (56) References JP-A Sho57 −35387 (JP, A) JP-A-4-122003 (JP, A) JP-A-56-2251 (JP, A) JP-A-63-165812 (JP, U) (58) Fields investigated (Int. . ^7, DB name) H01L 39/02 - 39/04 H01L 39/14 - 39/16 H01F 6/00

Claims (5)

(57) [Claims] 1. A superconducting coil, a cryogenic refrigerant tank containing the superconducting coil immersed in a cryogenic refrigerant, and a permanent current switch for exciting and demagnetizing the superconducting coil; In a superconducting device comprising a refrigerant box immersed in and housed therein and a vacuum chamber accommodating the entirety thereof, the refrigerant box immersed in the permanent current switch and immersed in a refrigerant is provided through an adiabatic load support. A superconducting device supported by a vacuum chamber. 2. A superconducting coil, a cryogenic refrigerant tank containing the superconducting coil immersed in a cryogenic refrigerant, and a permanent current switch for exciting and demagnetizing the superconducting coil. In a superconducting device comprising a refrigerant box immersed in and housed therein, and a vacuum chamber accommodating the entirety thereof, the vacuum tank is provided with an adiabatic load supporting a refrigerant box immersed in the permanent current switch and housed therein. A superconducting device characterized by being supported through a body. 3. A superconducting coil, a cryogenic refrigerant tank containing the superconducting coil immersed in a cryogenic refrigerant, a permanent current switch for exciting and demagnetizing the superconducting coil, and A superconducting device comprising a refrigerant box immersed in and stored in a cryogenic refrigerant, and a vacuum chamber storing the entirety of the refrigerant box. A superconducting device, wherein a refrigerant box immersed in and stored in a refrigerant is independently supported. 4. A superconducting coil, a cryogenic refrigerant tank containing the superconducting coil immersed in a cryogenic refrigerant, a permanent current switch for exciting and demagnetizing the superconducting coil, and A superconducting device comprising a refrigerant box immersed in and housed in a superconducting coil, and a vacuum chamber accommodating the whole of the refrigerant box.
More apart place, before which houses the permanent current switch of this
A superconducting device, wherein the refrigerant box is supported via an adiabatic load support . 5. A superconducting coil, a cryogenic refrigerant tank containing the superconducting coil immersed in a cryogenic refrigerant, and a permanent current switch for exciting and demagnetizing the superconducting coil; In a superconducting device comprising a refrigerant box immersed in and housed in a refrigerant, and a vacuum chamber accommodating the entirety thereof, a cooling system in which the permanent current switch is immersed in a refrigerant and housed
The box is provided with an adiabatic load support from at least two sides of the vacuum chamber.
A superconducting device characterized by being supported through a superconductor.