JPH0797883B2 - Superconducting magnet device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a superconducting magnet device in which a superconducting magnet mounted on a superconducting magnetic levitation railway has vibration-proof support so as to prevent vibration received during traveling. Is.

[Prior Art] FIG. 2 is a cross-sectional view showing a configuration of a conventional magnetic levitation railway vehicle. In the figure, a superconducting magnet (1) is attached to a bogie frame (2). (3) is a vehicle body. A levitation coil (5) and a propulsion guide coil (6) are installed on a concave ground guideway (4).

FIG. 3 is a side view showing the structure of a conventional superconducting magnet (1) mounted on the above magnetically levitated vehicle, and FIG. 4 is a conventional superconducting magnet shown in, for example, Japanese Patent Laid-Open No. 59-98570. It is a cross-sectional view which shows the detail of the load support part (9) of (1).

In the figure, (7) is an outer tank, (8) is a part of the outer tank, a fixed shaft provided with a mounting seat at one end thereof and provided with a disk, and the mounting seat of this fixed shaft (8) is a bogie frame ( It is fixed to 2). (9) is a multi-cylinder shape in which cylinders with different diameters are concentrically arranged, and adjacent cylinders are alternately joined at end portions or central portions alternately, and the outermost cylinder as an outer diameter portion (9a)
And a plurality of heat insulating supports each having a fitting part in the innermost cylinder (9b) as an inner diameter part, and is composed of a fiber reinforced plastic material such as carbon cloth having a low thermal conductivity. (10) is a racetrack type superconducting coil (1
1) is an inner tank that is arranged so as to surround a plurality of heat insulating supports (9) and is cooled to the liquid helium temperature. (12) is a heat shield plate that is located between the inner tank (10) and the outer tank (7) and is joined to the intermediate shield metal fitting (9c) by welding or the like, and shields the radiant heat from the outer tank. The intermediate shield metal fittings (9c) are used as thermal anchors to reduce heat intrusion due to heat conduction of the heat insulating support (9).

The conventional superconducting magnet device for a magnetically levitated vehicle is configured as described above, and the vehicle is vertically moved by the magnetic force acting between the superconducting coil (11), the levitation coil (5) on the ground side, and the propulsion guide coil (6). Levitate, propel in the front-back direction, and guide in the left-right direction. At this time, large magnetic forces are generated in the vertical, front-rear, and left-right directions between the superconducting coil (11), the levitation coil (5), and the propulsion coil (6), and these magnetic forces are generated by the superconducting coil (11). It acts on the inner tank (10),
0) is transmitted to the bogie frame (2) through the heat insulating support (9) and the fixed shaft (8).

The vibration from the superconducting coil (11) as a vibration source is transmitted to the bogie frame (2) by following the above route, and the vibration generated from the bogie frame (2) is transmitted in the reverse route to the inner tank (10) and It is transmitted to the superconducting coil (11).

In the conventional superconducting magnet device, it is difficult to install a device that reduces vibration due to restrictions such as installation space, and the above vibration is directly transmitted.

[Problems to be Solved by the Invention] Since the conventional superconducting magnet device is configured as described above, vibration caused by the superconducting coil (11) as a vibration source is generated from the heat insulating support (9) to the outer tank (7). Be transmitted to. Further, the vibration from the bogie frame (2) is transmitted from the fixed shaft (8) to the outer layer (7) and from the heat insulating support (9) to the inner tank (10) and the superconducting coil (11).

Due to the above vibration transmission, the superconducting magnet is excited,
When in a resonance state, there is a problem that heat is generated due to vibration and the superconducting state cannot be maintained.

The present invention has been made to solve the above problems, and suppresses the amount of heat intrusion from the outside as much as possible, can be used in a limited installation place, a superconducting magnet device that can reduce the vibration of the superconducting magnet. The purpose is to get.

[Means for Solving the Problem] In the superconducting magnet device according to the present invention, a metallic friction damper including an inner ring having a trapezoidal cross section and an outer ring having a trapezoidal cross section is provided between the outer tank and the fixed shaft. It is a thing.

[Operation] In the present invention, the vibration generated by the superconducting magnet or the vibration transmitted from the bogie frame to the superconducting magnet through the fixed shaft is absorbed by the ring spring friction damper having a trapezoidal cross section.

[Embodiment] FIG. 1 shows an embodiment of the present invention, in which an outer ring (13) using a ring spring and an inner ring (14) also using a ring spring are both ring-shaped with a trapezoidal cross section. A metallic friction damper is arranged around the fixed shaft (8). The stopper (15) is for attaching a friction damper consisting of a fixed shaft (8), an outer ring (13) and an inner ring (14). The tightening force can be changed by a screw, and the spring constant can be changed by changing the tightening force. You can The spacer (16) is for fixing the superconducting magnet (1) and the underframe (2), and like the stopper (15), the tightening force can be changed by a screw.

In addition, the same reference numerals as those in FIGS. 2 to 4 are the same parts.

With the above configuration, the exciting force generated in the superconducting magnet (1) by the electromagnetic force received by the superconducting coil (11), the inner tank (10), and the heat shield plate (12) during traveling is fixed shaft (8).
Is transmitted to the bogie frame (2). Or bogie frame (2)
Is transmitted to the superconducting magnet (1) from the fixed shaft (8).

In the above embodiment, the vibration is absorbed by the ring-shaped friction damper including the outer ring (13) and the inner ring (14) provided between the fixed shaft (8) and the outer tub (7). This ring-shaped friction damper has a conical friction surface, outer ring (13), inner ring (14)
Are stacked, the outer ring (13) extends against the load,
The inner ring (14) contracts and flexes as a whole, and at this time, vibration energy is absorbed.

The features of this ring-shaped friction damper are that it does not enter heat, can be stored in a limited installation space, can be manufactured at low cost, and is maintenance-free. Further, by changing the cross-sectional areas, diameters, angles of the friction surfaces, and the tightening force (axial force) with the fixed shaft (8) of the outer ring (13) and the inner ring (14), a vibration damping device (damper) having various characteristics can be obtained. It can be designed.

As described above, according to the present invention, since the annular metallic friction damper having a trapezoidal cross section is interposed between the superconducting magnet and the bogie frame, the superconducting magnet can be inexpensively installed even in a limited installation place. Has the effect of reducing the vibration.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a lateral sectional view of a conventional magnetic levitation railway vehicle, FIG. 3 is a schematic side sectional view of a conventional superconducting magnet, and FIG. FIG. 3 is a sectional view of relevant parts showing a mounting structure of the superconducting magnet and the bogie frame. (1) …… Superconducting magnet, (2) …… Bogie frame, (8) ……
Fixed shaft, (11) …… Superconducting coil, (13) …… Outer ring friction damper, (14) …… Inner ring friction damper. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A trolley mounted on a trolley via a fixed shaft, and an outer tub,
A superconducting magnet device comprising a superconducting magnet having an inner tank accommodating a racetrack type superconducting coil arranged inside the outer tank, wherein a trapezoidal cross section is provided between the outer tank and the fixed shaft. A superconducting magnet device including a metallic friction damper including an inner ring of the above and an outer ring of a trapezoidal cross section arranged outside the inner ring.