JPH0558281A - Attaching structure of ground coil for magnetic levitation railroad - Google Patents

Abstract

PURPOSE:To control the occurrence of stress caused by thermal expansion by arranging a pair of cylindrical fixing metal fittings having a wedge-shaped section in a fitting hole for a ground coil fitted on a stud bolt, and fitting the ground coil on a stud bolt through an elastic member and fastening a nut. CONSTITUTION:This coil is a track side coil attached to the vertical side wall 2 of the U-shaped concrete crossbeam of a track. Propulsion coils 3, 4 arranged many pieces by many pieces in the longitudinal direction of the track in two inner and outer layers severally have a coil main body 10 formed of electric conductors wound in many turns, and receive electric current from a coil bushing 12 led to outside a molded resin insulator 11 to generate electromagnetic force necessary for propelling a vehicle. In fitting propulsion coils 3, 4 like these, a fitting bolt 16 is thread-fitted to an insert 15 embedded in the track side wall 2, and the propulsion coil 5 is loosely fitted on the bolt 16 through a spacer 21, and the propulsion coil 3 is oppositely provided with a pair of cylindrical fitting metal fittings 20A, 20B having a wedge-shaped section, and fittedly fixed through an elastic member 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a ground coil attached to a track of a superconducting magnetic levitation railway or the like.

[0002]

2. Description of the Related Art In a superconducting magnetic levitation railway, a ground coil must be fixed over the entire length of the track, and its mounting accuracy is the same as that of a rail laying of a general railway, and the riding comfort of a vehicle traveling on it. Have a significant impact on.

By the way, since the ground coil attached to the track has a structure in which a coil body formed by winding a large number of conductors is integrally covered with a molded resin insulator, it is attempted to tighten and fix the ground coil with bolts and nuts. Even if you think about it, the tightening force will be loosened when the molded resin insulator becomes dimensional and becomes negative due to aging. For this reason, when the working force between the vehicle-side electromagnet and the ground coil is repeatedly applied as the vehicle travels, the ground coil easily moves and deviates from the regular position where it was originally installed, and vehicles passing near it are moved. It causes a vibration source that impairs the riding comfort.

Therefore, if it is attempted to completely fix the ground coil so that the ground coil does not move with respect to the track even if the molded resin insulator is broken and becomes dimensionally minor, a completely different material is used for the ground coil and the track. Therefore, if there is a change in temperature, a difference in length will occur, which requires pressing with a very large force, and the mold resin insulator of the coil may be destroyed.

[0005]

For this reason, Japanese Patent Application No. 2-39016 has been proposed as a structure in which a specific part is firmly fixed by a fixing tool and thermal expansion is allowed to the other part. This structure is an excellent invention in that it can prevent the ground coil from being misaligned, but since a resin injection hole is provided in the center of the bolt and resin injection is performed from this hole, the mounting bolt must be machined. Is troublesome and also expensive in terms of cost.

Since the ground coil must be installed over the entire length of the track, a huge number of ground coils are required. Therefore, it is desired to make the structure as easy as possible.

From the above, the present invention suppresses the stress generation due to the thermal expansion due to the temperature change by the simple construction excellent in the workability, and the positional deviation from the regular position which is initially attached is reduced, so that the near position can be reduced. An object of the present invention is to provide a ground coil mounting structure that does not impair the riding comfort of a passing vehicle.

[0008]

SUMMARY OF THE INVENTION According to the present invention, mounting holes are provided at a plurality of locations on a molded resin insulator of a ground coil, and each of these mounting holes is loosely fitted to a stud bolt protruding from a side wall of a raceway. A pair of cylindrical fixing fittings having a wedge-shaped cross section are arranged to face each other on the outer surface of the stud bolt and the inside of the mounting hole, and the cylindrical fixing fitting and an elastic material interposed between the stud bolt and the mounting hole are provided. Then, the elastic material is fixed by crimping the elastic material to the outer surface of the stud bolt and the cylindrical fixing fitting and the inner surface of the mounting hole by tightening with the nut to narrow the gap between the pair of cylindrical fixing fittings. Is.

[0009]

[Operation] With a simple structure with excellent workability, it is possible to suppress the stress generation due to thermal expansion due to temperature change, and to reduce the displacement from the regular position initially installed.
A ground coil mounting structure that does not impair the riding comfort of a vehicle passing nearby can be realized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 5 is a cross-sectional view of a portion of the track 1. Track-side coils 3, 4 and 5 attached to the rising side wall 2 of the U-shaped concrete girder of the track 1 and superconducting conductors running along the track 1. The positional relationship with the superconducting magnet 7 provided on the side of the bogie of the magnetically levitated vehicle 6 is shown.

The coils 3 and 4 on the track side are the side walls 2 of the track.
The propulsion coil is mounted in a groove 2a formed on the inner surface by arranging a plurality of inner and outer layers in the longitudinal direction of the orbit. Also,
The track side coil 5 is a levitation guide coil which is mounted in a groove 2b formed on the inner surface of the track side wall 2 so as to be arranged in the track longitudinal direction. By combining the orbital coils 3 and 4 for propulsion, the orbital coil 5 for levitation guidance, and the superconducting magnet 7 on the bogie side of the magnetic levitation vehicle 6, the vehicle 6 is propelled while being levitation-guided. Is becoming In this embodiment, the mounting structure of the propulsion coils 3 arranged in the inner and outer layers will be described, but the present invention is also applicable to the mounting of the orbital side coil 5 for the levitation guide.

First, the orbital coils 3 and 4 for propulsion, which are arranged in the inner and outer layers, have the same size and size.
That is, as shown in FIG. 6, a coil body 10 formed by winding a conductor such as copper or aluminum many times, and a molded resin insulator 1 integrally covering the coil body 10.
The coil body 10 receives an electric current from the coil bushing 12 led out to the outside of the coil body 1, and the coil body 10 generates an electromagnetic force required to propel the magnetically levitated vehicle 6. Also, the ground coils 3 and 4 are in the orbit 1
As shown in FIG. 6, for attachment to the bosses 13, bosses 13 are formed on the upper and lower ends of the laterally elongated mold resin insulator 11 and the upper and lower parts of the inner middle, and the bosses 1 are formed.
In FIG. 3, four mounting holes 14A to 14D are provided, four on each of the upper and lower sides. These mounting holes are arranged at the same height and at equal intervals, and are formed to have hole diameters that allow loose fitting with slight gaps in the stud bolts 16 arranged on the side wall 2 of the track 1. As shown in FIG. 7, the ground coils 3 and 4 configured in this manner are arranged in a number of two layers in the inner and outer layers with the inner layer and the outer layer displaced by half a pitch in the track longitudinal direction. Then, as shown in FIG. 7, the ground coils 3 and 4 of the inner and outer layers are in a state where they are successively overlapped with each other in the first half and the second half. The mounting holes 14A, 14B and the upper half of the latter half of the upper and lower pairs match the four mounting holes 14C, 14D, respectively, and as shown in FIG. It is attached by tightening together with a nut 19 via 18.
This mounting state will be described with reference to FIG. Note that FIG. 1 is an enlarged cross-sectional view of the fastening structure of the portion corresponding to the AA line portion in FIG. 7.

In the figure, a bush 12 made of a medium-thick tubular metal member is embedded in the ground coil mounting portion of the molded resin insulator 11, and the inner surface of the bush 12 is attached to the mounting hole 1.
4A to 14D. The mounting bolt 16 is screwed and fixed to the insert 15 embedded in the track side wall 2, and the propulsion coils 3 and 4 are fixed to the washer 17, the lock washer 18,
The nut 19 is tightened and fixed. The ground coil 4 on the wall surface side in the figure is loosely fitted to the mounting bolt 16 via a spacer 21, and the other ground coil 3 has a pair of cross sections between the mounting bolt 16 and the mounting hole. The wedge-shaped cylindrical fixing members 20A and 20B are arranged to face each other, and the elastic member 22 made of rubber or the like is interposed and fixed between the cylindrical fixing member, the stud bolt, and the mounting hole. There is. Here, as shown in the perspective view of FIG. 5, the cylindrical fixing member 16 has a wedge-shaped cylindrical cross section, is provided with a slit 23 over the entire axial length, and has a notch 24 having a length up to the middle. ing.
Next, a fixing method having the above-described structure will be described with reference to FIG.

First, after the mounting hole 14 of the ground coil 3 is fitted into the mounting bolt 16, the cylindrical fixing member 20B is inserted between the mounting hole 14 and the mounting bolt 16, and then the rubber elastic material 22 is attached. insert. After that, the cylindrical fixing member 20A is inserted so as to face the cylindrical fixing member 20B which has been previously inserted and press the elastic material. Here, the nut 9 is tightened with the washer 17 and the lock washer 18 inserted in the threaded portion of the mounting bolt 16, and the cylindrical fixing member 20A is pushed between the elastic member 22 and the mounting hole 14. Here, the outer shapes of the cylindrical fixing metal fittings 20A and 20B are made smaller than the mounting hole diameter of the ground coil, but when the nut 9 is tightened and the cylindrical fixing metal fitting 20A is pushed in, the elastic material 22 pushes it to the outside to form a cylindrical shape. The fixing metal fittings 20A and 20B have a slotted portion that opens and becomes equal to the mounting hole diameter. At this time, the cylindrical fixing fittings 20A and 20B are deformed by the notches 24 and come into close contact with the mounting holes 14 almost completely. Further, the inner diameter of the elastic material 22 is manufactured to be slightly larger than the outer diameter of the mounting bolt 16, but at this time, the elastic material 22 comes into close contact with the outer periphery of the mounting bolt 16. Here, when the mounting bolt 16 and the mounting hole 14 are eccentric, the elastic member 22 adheres to the mounting bolt earlier than the one with a large gap, but the elastic member 22 still has a large gap if the gap is small. Since there is a space around it, some force is exerted in the direction to correct the eccentricity, but the rubber itself receives the force and flows in the circumferential direction to fill the space.

In this way, the ground coil 3 is crimped and fixed to the mounting bolt 16 via the pair of cylindrical fixing metal fittings 20A and 20B and the elastic member 22, so that the ground coil 3 can be attached to the two crimped and fixed center sides. As a result, the mounting position does not change even if thermal expansion occurs due to a temperature change, and when any other mounting position is about to move, it may move a little because it is loosely fitted through the spacer 21. As a result, it is possible to suppress the occurrence of stress and reduce the positional deviation from the regular position that was initially attached.

In the above-described embodiment, one of the coils arranged in double is loosely fitted through the spacer 21, and the other is crimped and fixed to the mounting bolt 16 through the cylindrical fixing metal fittings 20A and 20B and the elastic member 22. However, if it is difficult to manage the two ground coils separately, it is difficult to manage them. Select the distance between the fixing points as short as possible, and both are loosely fitted with spacers or fixed in a cylindrical shape. It may be fixed with metal fittings and elastic material. Further, in the above-described embodiment, the inclined surface of the cylindrical fixing metal fittings 20A and 20B is provided inside and the elastic member 22 is crimped to the mounting bolt 16 side. Alternatively, the inclined surface may be provided outside and the elastic member 22 may be pressure-bonded to the mounting hole 14 side.

[0018]

According to the present invention, it is possible to suppress the occurrence of stress due to thermal expansion due to temperature change and to reduce the displacement from the regular position initially attached by a simple structure having excellent workability. Therefore, it is possible to realize a ground coil mounting structure that does not impair the riding comfort of a vehicle passing nearby.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a structure for fastening a ground coil to a side wall.

FIG. 2 is a cross-sectional view illustrating a method of mounting the ground coil on the mounting bolt.

FIG. 3 is a cross-sectional view illustrating a crimping state between the mounting bolt and the mounting hole.

FIG. 4 is a perspective view of a cylindrical fixing bracket.

FIG. 5 is a partial sectional view showing the relationship between the ground coil and the superconducting coil.

FIG. 6 is a front view of the ground coil body.

FIG. 7 is a front view showing the arrangement of ground coils.

[Explanation of symbols]

1 ... Orbit, 2 ... Orbital side wall, 3, 4 ... Ground coil 10 ... Ground coil winding, 11 ... Mold resin insulator 12 ... Cylindrical member, 14A-14D ... Ground coil mounting hole 20A, 20B ... Cylindrical fixing metal fitting , 21 ... Spacer 22 ... Elastic material

Claims (2)

[Claims] 1. A mounting structure for a ground coil, wherein mounting holes are provided at a plurality of locations on a molded resin insulator of the ground coil, and each of these mounting holes is fitted with a stud bolt projecting from each track and tightened and fixed by a nut. A pair of cylindrical fixing members having a wedge-shaped cross section, which are arranged to face each other in the mounting hole, and an elastic member interposed between the cylindrical fixing member, the stud bolt, and the mounting hole. , By tightening with the nut to narrow the gap between the pair of cylindrical fixing fittings, the elastic material is fixed to the outer surface of the stud bolt and the cylindrical fixing fitting and the inner surface of the mounting hole by pressing. Characteristic magnetic levitation railway ground coil mounting structure. 2. The mounting structure of a ground coil for a magnetic levitation railway according to claim 1, wherein the cylindrical fixing member is provided with a slit in the axial direction.