JP3306619B2 - Superconducting magnet for magnetic levitation train with induction current collecting coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where power is collected from the ground side to the train side by utilizing an electromagnetic induction phenomenon between a superconducting magnet for a magnetic levitation train and a levitation coil and a propulsion coil on the ground side. The present invention relates to a superconducting magnet for a magnetic levitation train having an induction current collecting coil capable of maintaining a stable power supply and maintaining a superconducting state while securing a levitation force.

[0002]

2. Description of the Related Art Conventionally, a superconducting magnet used in a magnetic levitation train has a structure as shown in FIG. FIG. 3 is a cross-sectional view of the superconducting magnet 1. The superconducting magnet 1 shown in the drawing supports and fixes a superconducting coil 7, a donut-shaped inner tank 3 containing the superconducting coil 7, and the superconducting coil 7 on the inner wall of the inner tank 3. A plate-shaped metal fitting 16, an outer tub 2 for accommodating the inner tub 3, a load supporting member 8 for fixedly supporting the inner tub 3 at the center of the outer tub 2, and a heat insulating material attached to the entire inner peripheral wall of the outer tub 2. 10 and a nitrogen shield plate 9 attached to cover the inner peripheral surface of the heat insulating material 10. The inside of the inner tank 3 is filled with a refrigerant for cooling the superconducting coil 7, and a coolant passage hole 5 is formed in a metal fitting 16 radially arranged in the donut-shaped inner tank 3.

In addition, a magnetic levitation that collects electric power from the ground to the train using a levitation coil disposed on the ground side and an electromagnetic induction phenomenon generated between a propulsion coil and a superconducting coil on the train during running of the train. As a conventional example of a current collector for a train, there is one disclosed in Japanese Patent Application Laid-Open No. 8-280102, which is shown in FIG.
This will be described with reference to FIG. First, as shown in FIG.
The truck 7 is mounted on a truck 12, and the truck 12 floats and travels along a track 26. Side walls 18 are formed on both sides of the track 26. A propulsion coil 15 is provided along a surface of each side wall 18 facing the carriage 12, a first levitation coil 19 is arranged on the side of the propulsion coil 15 facing the trolley, and a lower side of the first levitation coil 19. A second levitation coil 20 is provided. On both sides of the bogie 12, superconducting coils for current collection 21 a to 21 d are arranged along the traveling direction of the train so as to face the first floating coil 19.

FIG. 6 is a cross-sectional side view as viewed from the side wall 18 side of FIG. 5, and has a flat plate-like shape in which a cryostat 23 of current collecting superconducting coils 21a to 21d and current collecting coils 22a to 22l are mounted on a carriage 12. By attaching the support member 24 to the support member 24, the height of the support member 24 in the vertical direction is increased, so that the rigidity of the support member 24 is improved. For this reason, the vibration of the cryostat 23 is suppressed, and the heat generation due to the friction between the current collecting superconducting coils 21a to 21d and the levitation propulsion superconducting coil 25 and the cryostat 23 is reduced, so that the evaporation amount of the liquid helium can be reduced.

[0005]

The current collector of the maglev train shown in FIGS. 5 and 6 is a system mainly for lighting inside a vehicle, air conditioning, and power supply to a vehicle-mounted He refrigerator.
Although it is considered that stable power supply is possible also in the systems of FIGS. 5 and 6, applying these systems to a maglev train may cause the following problems.

[0006] The coils constituting the current collecting system in the figure include a first levitation coil 19 and a second levitation coil 2.
Current collecting superconducting coil 21a to generate an electromagnetic field between zero
21d (upper part) and current collecting coils 22a to 22l (lower part) for collecting current by using an electromagnetic field generated at that time. The mounting location of the current collecting coil is limited,
There is a possibility that the power supplied to the vehicle cannot be supplied by one system.

[0007] By mounting a system for performing the following on a vehicle, the weight of the vehicle increases and the number of passengers transported decreases.

[0008] An object of the present invention is to solve the above problem by securing a space in which the surface of the outer tank can be placed close to the center of the coil and in which an induction current collecting coil can be installed, while maintaining a stable superconducting state, It is an object of the present invention to provide a superconducting magnet for a magnetic levitation train having an inductive current collecting coil capable of performing the following.

[0009]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides a superconducting magnet for a magnetic levitation train, which is installed on a car facing a levitation coil and a propulsion coil installed on the ground side. An induction current collecting coil is fixed to the surface of the superconducting magnet outer tank in opposition to the coil, and in the inner tank holding the superconducting coil in the refrigerant, the center of the superconducting coil is moved to the outer tank side where the current collecting coil is fixed. On the axis
Eccentric and close along . Also, the coolant passage hole of the spacer fitting inside the superconducting magnet close to the eccentricity is formed small on the induction current collecting coil side and large on the opposite bogie side.
Further, the spacer fitting near the side of the induction current collecting coil on which the coolant passage hole is made smaller is made thicker.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a superconducting magnet for a magnetic levitation train according to the present invention will be described with reference to FIG. In a maglev train, electric power for lighting inside a vehicle, air conditioning, a vehicle-mounted He refrigerator, and the like is collected by utilizing an electromagnetic induction phenomenon during traveling. The illustrated superconducting magnet for a magnetic levitation train includes a superconducting coil 7 and a donut-shaped inner tank 3 in which the superconducting coil 7 is mounted.
A plate-shaped spacer metal fitting 4 for supporting and fixing the superconducting coil 7 to the inner wall of the inner tank 3;
An outer tub 2 attached to a side surface facing the outer tub 8, a load supporting member 8 for fixedly supporting the inner tub 3 at the center of the outer tub 2, a heat insulating material 10 mounted on the entire inner peripheral wall of the outer tub 2, Insulation material 10
Nitrogen shield plate 9 attached so as to cover the inner peripheral surface of
And an induction current collecting coil 11 fixed to the side surface of the outer tub 2 opposed to the levitation coil 14 and the propulsion coil 15 installed on the side wall 18, and the superconducting coil 7, the induction current collecting coil 11, Are arranged with the center axis of the coil substantially horizontal. Inside the superconducting magnet 1 on the vehicle body 17 side (bogie 12 side), a superconducting coil 7 in a superconducting state is fixed in the inner tank 3 via a spacer fitting 4, and the inner tank 3 is in a vacuum state. It is supported using a load supporting member 8 inside the tank 2. Further, since a temperature gradient from room temperature to 4.2 K is generated in the outer tank 2, a nitrogen shield plate 9 and a heat insulating material 10 are provided. Next, the ground side wall 18
Has a propulsion coil 15 at a position facing the outer tub 2, a floating coil 14 at a side of the propulsion coil 15 facing the outer tub 2,
The superconducting coils 7 attached to the vehicle body 17 (bogie 12 side) generate levitation and propulsion required for traveling. Therefore, the floating coil 14 and the superconducting coil 7
, And the distance between the propulsion coil and the superconducting coil 7 generate levitation and propulsion, so it is not desirable to exceed a predetermined distance.

For this reason, the internal structure of the superconducting magnet 1 is such that an induction current collecting coil is provided between the surface of the outer tank 2 facing the floating coil 14 and the floating coil 14 at a predetermined distance from the floating coil 14. In order to secure a space for installing 11, the surface of the outer tub 2 facing the floating coil 14 is disposed at a required distance from the side wall 18. On the other hand, the superconducting coil 7 is arranged such that the distance between each coil provided on the side wall 18 and the superconducting coil 7 contained in the inner tank 3 is not increased, and the outer tank 2 on which the induction current collecting coil 11 is fixed. Is arranged eccentrically close to the wall surface side in the inner tank 3.

In the spacer fitting 4 for fixing the superconducting coil 7 radially arranged in the inner tank 3 and eccentrically close to the side wall 18 to the inner wall of the inner tank 3, the liquid passage hole through which the refrigerant passes is formed. The refrigerant passage hole b6 on the induction current collecting coil 11 side (the side where the distance between the superconducting coil 7 and the inner wall of the inner tank 3 is small) is small, and the opposite side of the truck 12 side (the inside of the superconducting coil 7 and the inner tank 3). The coolant passage hole a5 on the side where the distance between the face walls is large) is enlarged. Therefore, even if the superconducting coil 7 is eccentrically arranged in the inner tank 3, the refrigerant passage hole a5 is sufficiently large, so that a sufficient flow rate of the refrigerant to each part inside the inner tank 3 can be secured, and a stable superconducting state is maintained. Becomes possible.

At this time, the space on the side of the induction current collecting coil 11 is
It is fully conceivable that the metal fitting 4 has a reduced cross-sectional area due to the eccentric proximity of the superconducting coil 7 and a reduction in the overall rigidity of the superconducting magnet 1 and an increase in heat generation due to vibration by machining the coolant passage hole b6. . Therefore, as shown in FIG. 2, the rigidity is increased by increasing the thickness of the spacer 4 near the induction current collecting coil 11 side. In order to further increase the rigidity, there is a method of increasing only the plate thickness without processing the coolant passage hole b6.

According to the present embodiment, the induction current collecting coil 11 is mounted on the surface of the outer tank 2 that houses the inner tank 3 containing the superconducting coil 7 and faces the floating coil 14. Since it is eccentrically arranged on the side close to the induction current collecting coil 11 in the inner tank 3, the space between the levitation coil 14 or the propulsion coil 15 and the superconducting coil 7 arranged on the ground can be set to a required distance, It has become possible to carry out stable current collection while maintaining the necessary levitation and propulsion.

Further, according to the present embodiment, the outer tub 2 in which the superconducting coil 7 is accommodated and the induction current collecting coil 11 can be integrated, and a device dedicated to current collecting as in the conventional example (see FIG. 5). Since the current collecting superconducting coils 21a to 21d) shown in FIG. 6 are not required, the weight of the vehicle can be reduced and the number of passengers transported can be increased.

[0016]

According to the present invention, when power is collected from the ground side to the vehicle side by utilizing the electromagnetic induction phenomenon between the superconducting magnet for a magnetic levitation train mounted on the vehicle and the levitation coil on the ground side, In addition, a stable power supply and a superconducting state can be maintained while securing a space for installing the induction current collecting coil.

[Brief description of the drawings]

FIG. 1 is a sectional view of a superconducting magnet for a magnetic levitation train having an induction current collecting coil according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line A-A 'of FIG.

FIG. 3 is a sectional view of a superconducting magnet representing a conventional example.

FIG. 4 is a sectional view taken along line B-B ′ of FIG. 3;

FIG. 5 is a sectional view of a current collector of a magnetic levitation train showing a conventional example.

FIG. 6 is a sectional side view as viewed from a side wall side in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Superconducting magnet 2 Outer tank 3 Inner tank 4 Spacer fitting 5 Refrigerant passage hole a 6 Refrigerant passage hole b 7 Superconducting coil 8 Load support material 9 Nitrogen shield plate 10 Insulation material 11 Induction current collecting coil 12 Dolly 14 Floating coil REFERENCE SIGNS LIST 15 propulsion coil 16 bracket 17 vehicle body 18 side wall 19 first levitation coil 20 second levitation coil 21 a to 21 d current collecting superconducting coil 22 a to 22 l current collecting coil 23 cryostat 24 support member 25 levitation propulsion superconducting coil 26 orbit

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Fumio Suzuki 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Inside the Hitachi Plant (72) Inventor Hiroyuki Watanabe 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. 1 Hitachi, Ltd., Hitachi Plant (72) Inventor Tomo Chiba 3-1-1, Sakaimachi, Hitachi, Ibaraki Prefecture Hitachi, Ltd., Hitachi Plant (72) Eiji Suzuki Inventor Eiji Hikaricho, Kokubunji, Tokyo 8-8 38 Inside the Railway Technical Research Institute (72) Kaoru Nemoto 2-8-38 Hikaricho, Kokubunji-shi, Tokyo Inventor Kaoru Nemoto (72) Minoru Saito Mitsuru Saito, Hikari, Kokubunji-shi, Tokyo 2-8-8 Machi-cho 38 Railway Technical Research Institute (72) Inventor Yoshifumi Oki 2-8-8 Hikaricho 2-chome, Kokubunji-shi, Tokyo Inside the Railway Technical Research Institute (72) Inventor Hideaki Tsutsumi 2-8-8 Hikaricho, Kokubunji-shi, Tokyo 38 Within the Railway Technical Research Institute (56) References JP-A-9-191502 (JP, A) 8-69912 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 13/04 B61B 13/08

Claims (3)

(57) [Claims] An inner tank for holding a superconducting coil in a refrigerant and an outer tank for housing the inner tank are installed in a vehicle in opposition to a levitation coil and a propulsion coil installed on the ground. In the superconducting magnet for a magnetic levitation train, an induction current collecting coil is fixed to a surface of the outer tank facing the levitation coil, and the superconducting coil is fixed in the inner tank to which the induction current collecting coil is fixed. It was to the outer tank side, super power
A superconducting magnet for a magnetic levitation train having an induction current collecting coil fixed eccentrically and closely along a central axis of the conductive coil . 2. The superconducting coil is fixed at a position eccentric to the induction current collecting coil side in the inner tank by a plate-shaped spacer metal arranged radially in the inner tank. 2. The induction current collector according to claim 1, wherein the refrigerant passage hole is small on the induction current collection coil side, and the coolant passage hole on the opposite side of the induction current collection coil side and the superconducting coil is formed large. Superconducting magnet for magnetic levitation train with coil. 3. The thickness of the spacer bracket near the induction current collecting coil is greater than the thickness of the spacer on the opposite side of the induction current collecting coil and the superconducting coil. A superconducting magnet for a magnetic levitation train having the induction current collecting coil described in the above.