JPS6331404A - Magnetic rail for attraction type magnetically levitated carrier - Google Patents

Abstract

PURPOSE:To reduce the fluctuation and generation loss of a magnetic attracting force and a jointed section between magnetic rails, by a method wherein the unit magnetic rails are formed with the laminates of iron plates and insulating plates, and wherein the iron plates are projected at the jointed section in the guide direction, and wherein the tips of the iron plates are overlapped each other. CONSTITUTION:Unit magnetic rails 30, 30A jointed to each other consist of the laminates of iron plates 31 and insulating plates 32, and at the end section in the guide direction, a projected section 31A is formed with the iron plate 31 longer than the insulating plate 32 by l1 in the guide derection. At a jointed section 35 between adjacent unit magnetic rails 30 and 30A, a space 34 for thermal expansion absorption is retained, and over all a lap width l2, the iron plates 31 are composed to be overlapped each other. As a result, power loss in the magnetic rails can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to an electromagnet provided on the bogie side of a floating vehicle and a structure of a magnetic rail placed on the track side facing the electromagnet.

[Prior art and its problems]

Fig. 7 is a schematic structural diagram of the suction type magnetic levitation conveyance device, and Fig. 8 is an enlarged view of the main parts. For support! Magnet 6. Guide electromagnets 7 arranged to face each other
are arranged, and on the side of the elevated track 10, facing the armature 4, a secondary conductor and a laminate 5 of secondary iron, and facing the supporting electromagnet B, a supporting magnetic rail 8. Magnetic rails 9 for guiding are arranged opposite to the electromagnets 7 for guiding, respectively), and the magnetically levitated vehicle is pulled away from the track side by the magnetic attraction force acting between the electromagnets 6 and 7 and the magnetic rails 8 and 9. It is configured to be guided by contact and propelled along the guide direction of the track by a linear induction machine.

In the attraction type magnetic levitation conveyance device configured as described above, as shown in FIG. Then, the magnetic rail 8 for support is added, and the gap 1 is again inserted.
1, and enters the iron core of electromagnet B from other magnetic poles of electromagnet B, which are alternately arranged N and S poles in the guiding direction, forming a closed loop that circulates, but the magnetic resistance of the gap 11 is high, so that electromagnet B Since the magnetic flux is determined by the magnetic resistance of the gap 11, the magnetic flux density in the iron core of the electromagnet and the iron plate of the shiki rail 8 is only a fraction of the allowable magnetic flux density for the iron plate, for example 1T, and iron material is wasted. It tends to be used for
Furthermore, in order to reduce the magnetic resistance of the gap 11, it may be necessary to increase the magnetic pole area of the electromagnet, and in this case, the dimensions of the magnetic rail 8 in the stacking direction become larger, which causes an economic disadvantage. be. The same applies to the guiding magnetic rail 9.

FIG. 9 is a side view of the main parts of the supporting electromagnet and the magnetic rail, and shows the state of the connecting portion of the unit magnetic rail. In the figure, the supporting electromagnet 6 has a plurality of salient magnetic poles 6A, 6 so that N poles and S poles are alternately located in the guiding direction.
B, etc., and the supporting magnetic rail 8 is composed of a plurality of unit magnetic rails such as unit magnetic rails 8A and 8B having a predetermined length in the guiding direction, and a thermal expansion absorbing rail having a length of 9 at the connecting part. The gap 12 is provided so that even when the unit magnetic rail reaches the highest temperature, the unit magnetic rails 8A, 8B, etc. do not come into contact with each other and cause problems such as bending of the magnetic rail due to the expansion force. . However, as shown in the figure, when the magnet 6 is located near the gap 12 between adjacent magnetic rails 8A and 8B, the magnetic flux generated by exciting the electromagnet 6 flows from the magnetic pole 6A to the gap 11 as shown by the arrow in the figure. It enters the magnetic rail 8A through the magnetic rail 8A, then passes through the gap 12 between the magnetic rails 8A and 8B to the Shiki rail 8B, and then between the magnetic rail 8B and the magnetic pole 6B IIJii1
1 to the magnetic pole 6B.

The excitation current of the electromagnet is usually controlled for each magnetic pole. Therefore, magnetic rails 8A and 8B
At the joint 12, since the magnetic resistance in the gap portion is high, the air gap magnetic flux density between the magnetic rail 8 and the magnets 6A and 6B is lower than when the magnet is located outside the gap. Therefore, the attractive force acting on the electromagnet B decreases when it passes through the joint portion of the magnetic rail 8. This is especially true when the electromagnet has a small number of poles.

FIG. 10 is a structural diagram of a magnetic rail according to the prior art. Iron plates 21 with a thickness of about 1 inch, such as 21A, 21B, and 210, are laminated on the laminated surface, and thin insulating layers 26, such as insulating films and insulating sheets, such as 23A, 23B, and 23C, are laminated. A magnetic rail is used, which is a laminated assembly with an electromagnet 6 interposed between the electromagnets 6 and 6. The magnetic flux in the magnetic rail 8, which becomes a changing magnetic field when the north and south poles of the magnetic rail 8 pass alternately, generates an eddy current that circulates between adjacent iron plates via the poles, and the power loss in the magnetic rail increases. The disadvantage is that it increases.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned situation, and it is possible to reduce fluctuations in magnetic attraction force and generated losses at the joints of magnetic rails, use less iron plates, and provide a horizontal attraction type magnetic levitation conveyance device. The purpose is to provide magnetic rails.

[Key points of the invention]

The present invention provides a magnetic rail consisting of a joined body of a plurality of unit magnetic rails arranged along the guide direction of a track facing a supporting or internal electromagnet, and a magnetic rail that is made of iron plates and insulating plates that are long in the guide direction. Formed by laminated unit magnetic rails arranged alternately,
Also, the iron plates are made to protrude in the guiding direction at the ends of the unit magnetic rails, and the tips of the iron plates of adjacent unit magnetic rails at the connecting part are configured to overlap each other without making conductive contact with each other by maintaining a gap for absorbing thermal expansion. By doing so, it is possible to reduce the amount of steel plate used for the magnetic rail and the power loss caused by the magnetic rail without increasing the magnetic resistance between the magnetic pole surface of the electromagnet and the magnetic rail.
The magnetic resistance between the unit magnetic rails in the connecting portion is reduced, so that fluctuations in the magnetic attraction force that occur when the electromagnet passes through the connecting portion can be suppressed.

[Embodiments of the invention]

The present invention will be explained below based on examples.

FIG. 1 is a side view of the main parts of a magnetic rail showing an embodiment of the present invention, viewed from the side facing the electromagnet.

In the figure, 50 and 30A are unit magnetic rails that are connected to each other, and include a plurality of iron plates 31 that are long in the guiding direction, an asbestos plate that is thicker than the iron plate 61, and an asbestos cement plate (
Slate board) 1 A laminate with an insulating plate 62 as a spacing piece that is inexpensive and has high heat resistance, such as a gypsum board.
A gap 64 for absorbing thermal expansion is maintained between the tip of the iron plate 61 and the end face of the insulating plate 62 at the connecting portion 35 of the adjacent unit magnetic rails 30 and 30A. The iron plates are constructed so that they overlap each other over the lap width 12), and the protrusions 31A of the iron plates are arranged so that the thick insulating plate 32 overlaps the layer 1.
By holding m34A, conductive contact is avoided. =≠?In the magnetic rail configured as described above, when the N and S poles of the electromagnet pass across the connecting part 35, magnetic flux is generated at the connecting part. As shown by the arrow in the figure, by circulating the flow from the unit magnetic rail 30 side to the 30A side through the gap 34A, which has a wide area across the overlap margin 12 of the iron plate and has a small gap length, the connecting portion is improved compared to the conventional technology. The magnetic resistance of the magnetic rail can be greatly reduced, and therefore the magnetic resistance of the magnetic rail can be significantly reduced by inserting the insulating plate 52, which is thicker than the iron plate between the layers of the iron plate 61 of the magnetic rail in the parts other than the joint part. Since the space factor of the electromagnet decreases, there is a concern that the magnetic resistance of the air gap 11 (see FIG. 9) between the electromagnet and the magnetic pole surface will increase.

Regarding this point, increase the equivalent air gap length between the electromagnet and the magnetic rail by assuming that the thickness of the iron plate 61 is i 1ra, the thickness of the insulating plate 52 is 2 rren, and the air gap length 11 between the magnet and the magnetic rail is 10 + m. As a result of calculating the ratio, it is clear that the increase rate of the equivalent air gap length is only 2.1%, and the magnetic flux between the electromagnet and the magnetic rail is reduced to approximately X compared to that of the conventional technology. Asbestos can be used as an insulating plate and is cheaper than iron plate.

By being able to use plate-shaped bodies made of gypsum, cement, etc. as raw materials, magnetic rails can be formed at low cost.

In addition, by inserting an insulating plate that is thicker than the steel plate between the layers of the steel plate, it is possible to prevent conductive welding of adjacent steel plates due to the gaps between the steel plates, so power loss in the magnetic rail due to eddy currents that span between the steel plates can be prevented. can be eliminated.

FIG. 2 is a structural diagram of a magnetic rail showing a different embodiment of the present invention, in which a sheet-like insulating material with good sliding property is used between the layers of the overlapping portion of the iron plate 31 in the connecting portion 45 of the unit magnetic rail 30.3OA. This embodiment is different from the previous embodiments in that 42 is interposed, and there is an advantage that conductive contact between the iron plates at the connecting portion can be prevented, thereby preventing an increase in power loss.

FIG. 5 is a plan view of an iron plate of a magnetic rail showing still another embodiment of the present invention, and is different from the above-mentioned embodiments in that a slit 51 extending in the guiding direction is provided in a portion forming an overlapping portion of the iron plate 61. Since it is possible to control the spread of differences9,
It is possible to prevent an increase in power loss.

FIG. 4 is a structural diagram of a magnetic rail showing still another embodiment of the present invention, in which an iron plate 31 on the unit magnetic rail 60 side
This is different from the previous embodiment in that the structure is configured such that positional deviation in the stacking direction between the unit magnetic rails is eliminated by displacing the unit magnetic rails in the stacking direction at the connecting portion 55, and the air gap between the magnetic rail and the electromagnet is It is possible to eliminate the instability of the support guide due to the magnetic flux passing through moving in the stacking direction for each unit magnetic rail, and to reduce the width of the iron core on the electromagnet side, albeit slightly.

FIG. 5 is a structural diagram of a magnetic rail showing another embodiment of the present invention, in which the connecting portion 6 of the unit magnetic rail 30 and 3OA is shown.
5 is different from the previous embodiments in that a separate iron plate piece 61 connected to one unit magnetic rail 30 side is interposed to form an autocooler tube part), and the unit magnetic rails are laminated with each other. directional misalignment can be eliminated.

FIG. 6 is a sectional view of a magnetic rail in the guiding direction showing still another embodiment of the present invention, and shows an example of application to a dual-purpose magnetic rail in which guiding and supporting magnetic rails are integrally formed. It is something. In the figure, the magnetic rail 70 is made of a laminate of a steel plate 71 and an insulating plate 72 whose widths are sequential.) The surface 70A facing the supporting electromagnet is horizontal, and the surface 70B facing the guiding electromagnet is vertical. It is formed in a trapezoidal shape and is installed so that the laminated surface is inclined at 45 degrees on the elevated track side.

Also in the dual-purpose magnetic rail configured in this way, the magnetic resistance at the connecting portion can be reduced and the amount of iron plates used can be reduced, as in the above-described embodiments.

〔Effect of the invention〕

As described above, the present invention includes unit magnetic rails formed of a laminate of iron plates and insulating plates, which are arranged in conjunction with each other along the guide direction of the track so that the end faces of the laminate face the supporting and guiding electromagnets. The iron plate is made to protrude in the guiding direction at the connecting portion, and the tip of the iron plate maintains a gap for absorbing thermal expansion to form an overlapping connecting portion without being in conductive contact with each other. As a result, it is possible to reduce the magnetic resistance at the overlap part, eliminate the decrease in magnetic attraction force caused by the high magnetic resistance of the connecting part in the conventional technology, and stably support and guide the magnetically levitated vehicle. , the amount of iron plates used in the magnetic rail can be reduced to several times that of conventional devices without increasing the magnetic resistance of the air gap between the electromagnet and the magnetic rail, and the insulating plate used as the spacing piece can be used as an inexpensive insulator. By being able to form the magnetic rail using the same material, it is possible to economically advantageously provide a magnetic rail with excellent magnetic performance. In addition, by inserting a thicker insulating plate between the layers of the iron plates than in conventional equipment, the problem of four-electrical contact between the iron plates through the steel plates' bars IJ' is eliminated, and the power loss in the magnetic rail is reduced. This provides the advantage of reducing Furthermore, since the magnetomotive force loss can be reduced by reducing the magnetic resistance in the connecting portion, there is an advantage that the excitation current of the electromagnet can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram of a magnetic rail showing an embodiment of the present invention viewed from the side facing the electromagnet, Fig. 2 is a structural diagram showing a different embodiment, and Fig. 6 is a plan view of an iron plate showing a further different embodiment. ,
FIG. 4 is a structural diagram showing yet another embodiment, FIG. 5 is a structural diagram showing another embodiment, FIG. 6 is a sectional view in the guiding direction of the magnetic rail showing still another embodiment, and FIG. 7 is a structural diagram showing yet another embodiment. 8 is a schematic structural diagram of an attraction type magnetic levitation conveyance device, FIG. 8 is a sectional view of the main parts showing the conventional technology, FIG. 9 is a side view of the main parts of the magnetic rail and electromagnet of the conventional device, and FIG. 10 is the conventional device. It is a structural diagram of a magnetic rail. 3... Bogie, 6... Support electromagnet, 7... Guide electromagnet, 8... Support magnetic rail, 9... Guide magnetic rail, 10... Elevated track, 11...・9 gaps, 30
．． 3OA, 70...Unit magnetic rail, 31.71...
・Iron plate, 62.72...Insulating plate, 31A...Protrusion of iron plate, 34.12...Gap for thermal expansion absorption, 35,
45,55.65...Connection part, 34A...Gap, 4
2... Insulating layer, 51... Slit, 61... Iron plate piece. Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1) A salient pole-shaped support arranged symmetrically on the bogie side of the suction type magnetic levitation vehicle and formed such that N poles and S poles are alternately adjacent to each other in the traveling direction of the suction type magnetic levitation vehicle. A laminated unit magnetic rail that is long in the guiding direction of the floating vehicle is placed on the track side so as to face each other with a gap between the guiding electromagnet and the magnetic pole faces of each of the two electromagnets to absorb thermal expansion between them. magnetic rails that are arranged in a connected manner while maintaining a gap between the two, and are made by alternately arranging iron plates of a predetermined length and insulating plates that are shorter than the iron plate by a predetermined length adjacent to each other. It comprises a plurality of laminated unit magnetic rails and a connecting portion in which the tips of the iron plates of the unit magnetic rails that are connected to each other overlap each other without making conductive contact with each other while maintaining a gap for absorbing thermal expansion. A magnetic rail of a suction type magnetic levitation conveyance device characterized by: 2) A magnetic rail for an attraction type magnetic levitation conveyance device according to claim 1, characterized in that the connecting portion has a sheet-like insulating material interposed between overlapping iron plates. 3) The device according to claim 1, characterized in that the connecting portion has a separate iron plate piece interposed between the iron plates of adjacent unit magnetic rail ends to form an overlapping portion. Magnetic rail of suction type magnetic levitation transport device. 4) The magnetism of the suction type magnetic levitation conveyance device according to claim 1, wherein the unit magnetic rail has a plurality of slits extending in the length direction at the end of the iron plate in the connecting part. rail.