JP2002110421A - Propulsion coil for maglev railway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a propulsion coil used in maglev railway, which improves the efficiency of attaching work, reduces the number of attaching bolt fixing sections, and makes the management of the gaps between the propulsion coils easier. SOLUTION: In a propulsion coil block 1 in which propulsion coil conductors 1a-1f are integrally formed and covered with an insulating layer 3, projecting sections 3b are provided on one surface of the insulating layer 3 so as to suppress the elongation of the coils by thermal expansion. Therefore, the gaps between the propulsion coils can be controlled easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a propulsion coil for a magnetic levitation railway.

[0002]

2. Description of the Related Art FIG. 6 shows a schematic configuration of a ground coil facility 7 for running a magnetically levitated train. The ground coil equipment 7 for moving the maglev railway at high speed by magnetic force includes a levitation coil 6 for levitation of the maglev railway and a propulsion coil 5 for moving the maglev railway forward or backward. The propulsion coil 5 is provided on the back side of the levitation coil 6 (on the side far from the passing magnetic levitation train). Since a high-voltage three-phase alternating current (U, V, W phases) is applied to the propulsion coil 5, the coil is formed of an epoxy resin insulating layer 3 having high electrical insulation strength to provide ground insulation. The propulsion coil 5 is fitted in a spacer 8 provided on the edge layer 3.

Conventionally, such a ground coil facility 7 is manufactured independently of the propulsion coil 5 or the levitation coil 6,
Each one was attached to the concrete side wall 4,
As shown in FIG. 7, a plurality of propulsion coils 1 a to 1 f are formed integrally with the insulating layer 3 for the purpose of reducing the number of steps for mounting the ground coil equipment 7, the number of the terminals 9 and the connection cables 10, and reducing the manufacturing cost. A proposal has been made to use the above-described propulsion coil block 1 as a propulsion coil magnetically levitated ground coil for a railway (patent pending).

Further, as described in the prior art of Japanese Patent Application Laid-Open No. Hei 7-163127, a conventional fixing method of the ground coil equipment 7 includes a spacer 8 having a positioning on a concrete side wall 4 to which the ground coil 7 is attached. Mounting, storing the propulsion coil 5 and attaching it to the concrete side wall 4 integrally with the floating coil 6
In addition, a method of directly fixing a flange portion provided on a coil with a bolt has been devised. However, these are the mounting methods of the propulsion coil 5 as a single unit, and the fixing method in the propulsion coil block 1 needs to be newly examined.

[0005]

The poor mounting accuracy of the propulsion coil 5 causes a change in the external environment and unpredictable stress and deformation during traveling of the magnetic levitation type railway, and in some cases, the propulsion coil portion may fail. Mounting accuracy is important because vibration, noise, abrasion and breakage can occur. Propulsion coil block 1
In the case of, the concrete side wall 4 is harder to install due to the size increase due to the increase in the mass due to the increase in the amount of resin used for the insulating layer, as compared with the propulsion coil 5 configured as a single unit. There is concern about the mounting accuracy of

[0006] Further, during traveling of the magnetic levitation railway, the electromagnetic force acting on the integrally formed propulsion coil block 1 acts on the entire propulsion coil block 1, and the force is covered by the support portion. There is a problem in that it is necessary to secure a considerable number of bolt mounting portions if all the propulsive force is to be received by the bolt mounting portions.

A propulsion coil 5 used under all weather conditions
The thermal expansion and contraction occur due to the thermal expansion and contraction due to the temperature difference and the temperature rise due to the Joule heat at the time of energization when propelling the magnetic levitation railway, and the expansion and contraction occur in the entire propulsion coil block 1. In order to absorb the thermal elongation, it is necessary to provide a considerable gap between the propulsion coils, and it may take time to install the coils for managing the gap.

[0008] It is an object of the present invention to provide a propulsion coil for a magnetic levitation railway that facilitates gap management.

[0009]

That is, the present invention provides a means for suppressing the longitudinal extension of the propulsion coil block due to the thermal expansion of the propulsion coil block by the heat generated by the current when the propulsion coil is energized. , Provided between the propulsion coils.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

This will be described with reference to FIGS. 1 and 2 show a side view and a cross section of the integrally formed propulsion coil block 1, respectively. Propulsion coil block 1 is conductor 1
Propulsion coils 1a to 1c formed by winding Z a plurality of times are integrally molded with an insulating layer 3 of epoxy resin. Between the propulsion coil 1a and the propulsion coil 1b and between the propulsion coil 1b and the propulsion coil 1c, several mm
Although a gap of up to several tens of mm is provided, in the present invention, a protruding portion 3b is formed which protrudes outward from one surface 3a of the insulating layer 3 between the propulsion coil conductors 1a and 1b. The projection 3b is fitted in the recess 4a of the concrete side wall 4 shown in FIGS. 1X is a through hole penetrating through the inside of the propulsion coil 1a and the insulating layer 3, for example.

That is, when attaching the propulsion coil block 1 to the concrete side wall 4, the mass is increased when the propulsion coil block 1 is large, and there is a concern about the positioning of the propulsion coil block 1. Therefore, the propulsion coils 1a and 1b A projection 3b is provided between the two. This projection 3b is inserted into the recess 4a of the concrete side wall 4 as shown in FIGS.
It is packed in. The depression 4a is formed on the concrete side wall 4 according to the shape of the projection 3b. Projection 3b
Can be easily attached to the concrete side wall 4 by fitting the propulsion coil block 1 into the recess 4a. In this case, the projection 3b and the recess 4a
May be filled with a filler. In addition, inclined surfaces 3C and 4C are formed at the corners between the protrusion 3b and the recess 4a.

FIG. 3 schematically shows a ground coil integrally formed. FIG. 4 shows a cross section of the concrete side wall 4 and the propulsion coil block 1. By providing the upper and lower surfaces of the protrusions 3b of the propulsion coil block 1 on the contact surface with the concrete side wall 4, the propulsion coil block is provided. 1 and high positioning accuracy can be achieved.
FIG. 5 is a plan view of the protrusion 3b of the propulsion coil block 1 and the concrete side wall 4 from above.

As a result of inserting and fixing the projections 3 in the recesses 4a as described above, when thermal expansion and contraction due to a temperature difference in the use environment and thermal expansion due to a temperature rise due to Joule heat during energization of the propulsion coil block 1 occur, By restricting the direction of expansion and contraction by the projections 3, it is possible to suppress the entire heat elongation. If the protrusion 3 is not provided, the amount of heat expansion is equal to the number of propulsion coils, and it is necessary to provide a large gap between the propulsion coils 1a, 1b, 1c.

However, by providing the projections 3 between the propulsion coils 1a, 1b, 1c as in this embodiment, the amount of elongation due to heat is suppressed by each projection 3b. It is not necessary to provide a gap, and it is sufficient if there is a gap corresponding to the amount of elongation due to the heat of 1a, for example, at the end of the propulsion coil, so that gap management becomes easy.

That is, the present invention provides several propulsion coils 1a.
In the propulsion coil block 1 integrally formed with
When thermal expansion occurs due to thermal expansion and contraction due to a temperature difference in the usage environment and temperature rise due to Joule heat during energization, the protrusion 3b on the back of the propulsion coil is restrained in the longitudinal direction of the propulsion coil block 1 so that the overall heat is reduced. The amount of expansion and contraction is suppressed.

If the projection 3 is mounted so as to fit into the recess 4a, the propulsion coil block 1 can be easily mounted on the concrete side wall 4.
Installation work can be done easily. Also, with respect to the electromagnetic force acting on the propulsion coil block 1 during traveling of the magnetic levitation railway, the structure shown in FIGS. 4 and 5 enables the protrusion 3b to also receive the electromagnetic force. Even when the coil block 1 is fixed by bolts, it is not necessary to consider the required number of bolts at the protruding portions, so that the number of bolts can be reduced, and the number of supporting portions by bolts can be reduced. There is also.

Further, inclined surfaces 3c and 4c are formed at the corners of the projection 3b and the recess 4a. The entire shape of the projection 3b and the depression 4a is formed in a trapezoidal shape.
When the projection 3b is fitted and fixed in the recess 4a,
The contact area is widened by the inclined surfaces 3c and 4c, and it is possible to further firmly fix.

[0019]

As described above, according to the present invention, the amount of elongation due to thermal expansion between the propulsion coils is suppressed, and the gap can be easily managed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a propulsion coil block used for a magnetic levitation railway according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a propulsion coil block of FIG. 1;

FIG. 3 is a perspective view showing a state in which the propulsion coil block of FIG. 1 is installed on a concrete side wall.

FIG. 4 is a cross-sectional view showing a state where the propulsion coil block of FIG. 3 is installed on a concrete side wall.

FIG. 5 is a plan view showing a state where the propulsion coil block of FIG. 3 is installed on a concrete side wall.

FIG. 6 is a perspective view showing a state where a conventional propulsion coil is installed on a concrete side wall.

FIG. 7 is a perspective view showing a configuration of a conventional propulsion coil block.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Propulsion coil block, 1a-1f ... Propulsion coil, 3
... Insulating layer, 3b ... Protrusion, 4 ... Concrete side wall, 4a
... recess, 5 ... propulsion coil, 6 ... floating coil, 7 ... ground coil equipment, 8 ... spacer.

Continuation of the front page (72) Inventor Yoshichi Sakayori 3-1-1 Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Hitachi Works (72) Inventor Hiroyuki Watanabe 3-1-1 Sachimachi, Hitachi-shi, Ibaraki Within the Nuclear Power Division of Hitachi, Ltd. (72) Inventor Takeshi Umeki 1-4-1 Meiji Station, Nakamura-ku, Nagoya City, Aichi Prefecture Inside Tokai Railway Company (72) Inventor Masamichi Ogawa Name of Nakamura-ku, Nagoya City, Aichi Prefecture Station 1-4-1, Tokai Passenger Railway Co., Ltd. F term (reference) 2D056 DA01 DA08

Claims (5)

[Claims] 1. A guideway side wall is provided along a runway of a magnetic levitation railway, and a propulsion coil block formed by integrally covering a plurality of propulsion coils with an insulating layer is provided on the guideway side wall. A propulsion coil for a magnetically levitated railway, wherein means for suppressing expansion and contraction of the thermal expansion of the propulsion coil block in a direction in which the propulsion coil is arranged by heat generated by energization is provided between the propulsion coils. 2. The propulsion coil for a magnetically levitated railway according to claim 1, wherein a protrusion formed on one surface of the propulsion coil block is provided as the suppression means. 3. A guideway side wall is provided along a runway of a magnetic levitation railway, and a rectangular propulsion coil block in which a plurality of propulsion coils are covered with an insulating layer is provided on the guideway side wall. A protruding portion that protrudes on one surface of the propulsion coil block between the protruding coil blocks, and the protruding portion is inserted and supported in a recess formed in the guideway side wall. 4. The propulsion coil for a magnetically levitated railway according to claim 2, wherein corners of the protrusion and the recess are formed on an inclined surface. 5. A propulsion coil block provided with a projection projecting from one side of the propulsion coil block between the propulsion coils, and an end of the propulsion coil block having the propulsion coil and the insulating layer on the end side. The propulsion coil for a magnetically levitated railway according to claim 1 or 3, wherein a gap is provided corresponding to the extension.