JP2007253906A - Noncontact wheel tread adhesion increasing activator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noncontact wheel tread adhesion increasing activator capable of securing performance at low speed by adding a magnetic path switched by simultaneously using an electric field of a permanent magnet and a high-frequency electric field of an electromagnet, and of obtaining a high adhesive force on a wheel tread when increasing speed (powering). <P>SOLUTION: The noncontact wheel tread adhesion increasing activator comprises the permanent magnet 3 arranged so as to face to a tread of an iron wheel 1, an electromagnet 4 arranged so as to act against the magnetic field of the permanent magnet 3, and a magnetic wire brush 8. The magnetic path is comprised of the magnetic filed of the permanent magnet 3 and a magnetic power attached to the magnetic wire brush 8. The magnetic path is switched by simultaneously using the magnetic field of the electromagnet 4, and added to the magnetic path. The tread of the iron wheel 1 is heated by electromagnetic induction. Kinematic viscosity of a water film is reduced by indirectly heating the water film on the tread surface of the iron wheel 1. Accordingly, the increased adhesive force is increased. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a non-contact type wheel tread increasing adhesive activator.

  As conventional wheel tread increasing adhesion methods, a method of pressing a friction material called a wheel tread polishing element or a wheel tread cleaning element on the wheel tread, or a method of injecting ceramic particles onto the wheel tread to obtain roughness on the wheel tread is used. It has been.

  In addition, the inventors of the present application have arranged a magnet block that is arranged in an array of magnet groups facing the wheel tread of a railway vehicle and rotated the direction of the magnetic pole by 90 ° for each adjacent magnet. The railway wheel tread increasing adhesion method for increasing the pressure of the wheel tread by increasing the temperature of the wheel by the iron loss of the wheel caused by electromagnetic induction from the magnet block, lowering the fluid viscosity interposed between the wheel and the rail by the temperature increase And an apparatus thereof have been proposed (see Patent Document 1 and Non-Patent Document 1 below).

Further, in the wheel tread increasing adhesive device, an electromagnet device is disposed near the rail tread surface of the railway vehicle and in the vicinity of the rail to generate electromagnetic induction from the electromagnet device when the vehicle is running, and thereby the wheel iron generated thereby. Although it has not been disclosed yet, it has been proposed to increase the temperature of the wheel tread surface due to damage, reduce the fluid viscosity interposed between the wheel and rail by increasing the temperature, and increase the adhesion of the wheel tread. (Patent Document 2 below).
JP 2004-338648 A Japanese Patent Application No. 2005-101430 J-RAIL 2004 11th Railway Technology Union Symposium, Proceedings, December 2004, Institute of Electrical Engineers of Japan, Transport and Electric Railway Technical Committee, pp. 61

  However, in the conventional wheel tread increasing adhesion method described above, friction due to friction material is generated on the wheel tread, and the acceleration performance is deteriorated due to continuous use during powering. There were problems such as being unable to do so.

  Further, when the magnet block is arranged, the workability and the demagnetizing method thereof are complicated by being always attracted, and there is a problem that the performance is lowered at a low speed of 100 km / h or less.

  Furthermore, when an electromagnet is used alone, there is a problem that power consumption increases.

  In view of the above situation, the present invention can add a magnetic field of a permanent magnet and a high-frequency magnetic field of an electromagnet together to ensure performance at a low speed and obtain a high adhesive force on a wheel tread even during acceleration (powering). An object of the present invention is to provide a non-contact type wheel tread increasing adhesive activator that can switch the magnetic path of a permanent magnet according to the presence or absence of excitation of an electromagnet, thereby facilitating on-site inspection and repair work.

  [1] A non-contact type wheel tread increasing adhesive activator, comprising: a permanent magnet disposed so as to face a tread surface of an iron wheel; and an electromagnet disposed so as to act on a magnetic field of the permanent magnet, A magnetic path is composed of a magnetic field of a permanent magnet and magnetic powder, and the magnetic field of the electromagnet is added to the magnetic path, and the tread of the iron wheel is heated by electromagnetic induction, and a water film on the surface of the tread of the iron wheel. Is heated indirectly to decrease the kinematic viscosity of the water film and increase the adhesive strength.

  [2] The non-contact type wheel tread increasing adhesive activator according to [1], wherein a high frequency magnetic field is generated in the electromagnet to increase an increasing adhesive force in a low speed rotation state or a stop state of the iron wheel. And

  [3] The non-contact type wheel tread increasing adhesive activator according to [1], wherein a DC excitation magnetic field is generated in the electromagnet to increase the increasing adhesive force in a high-speed rotation state of the iron wheel.

  [4] In the non-contact type wheel tread increasing adhesive activator according to [1], [2] or [3], the electromagnet and the permanent magnet are molded with a nonmagnetic mold member, and upper and lower surfaces of the nonmagnetic mold member A back metal is fixed to the steel wheel, and a wire brush having magnetism is provided on the iron wheel side.

  [5] In the non-contact type wheel tread increasing adhesive activator according to [4], a plurality of the electromagnets and permanent magnets are arranged in a lateral direction, and the magnetic path of the permanent magnets is switched by excitation of the electromagnets. It is characterized by.

  According to the present invention, by combining the magnetic field of the permanent magnet and the high frequency magnetic field of the electromagnet, it is possible to ensure the performance at low speed, and to obtain a high adhesive force on the wheel tread even during acceleration (powering), By switching the magnetic path of the permanent magnet according to the presence or absence of excitation of the electromagnet, the inspection and repair work at the site can be facilitated.

  The non-contact type wheel tread increasing adhesion activator of the present invention comprises a permanent magnet disposed so as to face the tread surface of the iron wheel, and an electromagnet disposed so as to act on the magnetic field of the permanent magnet, A magnetic path is composed of a magnetic field of a permanent magnet and magnetic powder, and the magnetic field of the electromagnet is added to the magnetic path, and the tread of the iron wheel is heated by electromagnetic induction, and a water film on the surface of the tread of the iron wheel. It is characterized in that the kinematic viscosity of the water film is lowered by indirectly heating and the adhesive strength is increased.

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is a schematic top view of a non-contact type wheel tread increasing adhesive activator showing a first embodiment of the present invention, FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. 1, and FIG. It is a line section schematic diagram.

  In these figures, 1 is an iron wheel, 2 is a non-contact type wheel tread increasing activator disposed so as to face the tread surface of the iron wheel 1, and 3 is mounted on the wheel tread increasing adhesive activator 2. Permanent magnets arranged so as to face the tread surface of the wheel 1, 4 is an electromagnet having a coil 5 for applying a magnetic field used in combination with the magnetic field of the permanent magnet 3, and 6 is a back metal that constitutes a part of the magnetic path. (Iron member), 7 is a non-magnetic mold member for molding the permanent magnet 3 and the coil 5, and 8 is a wire brush having magnetism.

  In this way, a magnetic path is constituted by the magnetic field of the permanent magnet 3 and the magnetic powder having the wire brush 8, and the high-frequency magnetic field of the electromagnet 4 having the coil 5 is used in combination with this magnetic path. Thus, the magnetic field of the permanent magnet 3 acts against the high-frequency magnetic field of the electromagnet 4, and the magnetic path on the iron wheel 1 side is greatly expanded so that the magnetic field acts on the iron wheel 1 sufficiently. By sufficiently electromagnetically heating the tread surface of the iron wheel 1 and indirectly heating the water film on the surface of the tread surface of the iron wheel 1, the kinematic viscosity of the water film can be reduced and the increased adhesive force can be increased. When the high-frequency magnetic field of the electromagnet 4 is turned off, as shown by a solid line in FIG. 2, the magnetic path is formed only by the permanent magnet 3, so that a closed circuit is formed inside the apparatus and does not act on the iron wheel 1. In particular, at the time of inspection work, the work can be easily advanced by turning off the high-frequency magnetic field of the electromagnet 4.

  4 is a top view of a non-contact type wheel tread increasing adhesive activator showing a second embodiment of the present invention, FIG. 5 is a sectional view taken along the line CC of FIG. 4, FIG. 6 is a side view of FIG. FIG. 8 is a top view showing the outer shape of the non-contact type wheel tread increasing adhesive activator, and FIG. 9 is a front view showing the outer shape of the non-contact type wheel tread increasing adhesive activator. .

  In these figures, 11 is an iron wheel, 11A is a tread surface of the iron wheel (see FIG. 6), 12 is a non-contact type wheel tread increasing adhesive activator arranged to face the tread surface of the iron wheel 11, and 13 is A permanent magnet mounted on the wheel tread increasing adhesive activator 12 and disposed so as to face the tread surface of the iron wheel 11; an electromagnet having a coil 15 for applying a magnetic field used in combination with the magnetic field of the permanent magnet 13; 16 is a back metal (iron member) constituting a part of the magnetic path, 17 is a non-magnetic mold member for molding the permanent magnet 13 and the coil 15, 18 is a box for connecting the ends of the coil 15, and 19 is a box. A waterproof cable connected to a DC power source for supplying power to the coil 15 connected at 18; 20 is an iron wire brush which is arranged between the iron wheel 11 and the increased adhesion activator 12 and generates iron powder; 1 is a bolt for fixing the brush 20, 22 is a mounting bolt for the back metal 16, 23 is a nonmagnetic casing made of resin, 24 is a mounting bolt for the nonmagnetic casing 23, 25 is a connecting portion of the increased adhesion activator 12, 26 Is a square hole formed in the connecting portion 25.

  Here, also in FIG. 5, as shown in FIG. 2 described above, the magnetic path is constituted by the magnetic field of the permanent magnet 13 and the magnetic powder having the wire brush 20, and the electromagnet 14 having the coil 15 in the magnetic path. In combination with the high-frequency magnetic field, the magnetic field of the permanent magnet 13 acts against the high-frequency magnetic field of the electromagnet 14, and the magnetic path on the iron wheel 11 side is greatly expanded so that the magnetic field acts sufficiently on the iron wheel 11. By being added, the tread surface of the iron wheel 11 is sufficiently electromagnetically induction heated, and the water film on the surface of the tread surface of the iron wheel 11 is indirectly heated, thereby reducing the kinematic viscosity of the water film and increasing the adhesive strength. Can do. When the high-frequency magnetic field of the electromagnet 14 is turned off, as shown by a solid line in FIG. 5, the magnetic path is formed only by the electromagnet 14, so that a closed circuit is formed inside the apparatus and does not act on the iron wheel 11.

  As shown in FIG. 7, the coils 15 and the permanent magnets 13 are arranged so that the windings of the coils 15 are connected in series and the winding directions of adjacent coils 15 are reversed. Then, the permanent magnet 13 is arranged as shown in FIG.

  Moreover, although the above-mentioned electromagnet showed what was set as the direct current | flow excitation electromagnet, it can be made into a high frequency electromagnetic magnet. In the case of this DC exciting electromagnet, it is inexpensive and has an advantage for high speed use. Moreover, removal is easy. On the other hand, in the case of a high-frequency electromagnetic magnet, heating is possible even at low speed and in a stopped state.

  Therefore, the magnetic field by a permanent magnet and the magnetic field by an electromagnet can be made to act according to the speed of a railway vehicle. For example, in the case of a direct current excitation electromagnet, the amount of magnetic flux to the iron wheel can be increased or decreased depending on the direction of the direct current magnetic field, so that attachment and removal during repair are easy.

  In the said Example, the non-contact-type wheel tread increasing adhesion activator with which the permanent magnet and the electromagnet which has a coil were integrated is comprised compactly.

  And, it can be used at all times during power running of railway vehicles, and replacement parts due to frictional wear could be eliminated.

  Furthermore, it is possible to achieve both an increase in the application speed of the railway vehicle and a reduction in the wheel tread increasing adhesive activator.

  The non-contact type wheel tread increasing adhesive activator of the present invention can be used for the next generation high-speed Shinkansen of a disc brake type.

It is a top schematic diagram of the non-contact type wheel tread increasing adhesion activator which shows the 1st example of the present invention. FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a schematic cross-sectional view taken along line BB in FIG. 2. It is a top view of the non-contact-type wheel tread increasing adhesion activator which shows the 2nd Example of this invention. It is CC sectional view taken on the line of FIG. FIG. 5 is a side view of FIG. 4. FIG. 6 is a layout diagram of coils and permanent magnets of a non-contact type wheel tread increasing adhesive activator showing a second embodiment of the present invention. It is a top view which shows the external shape of the non-contact-type wheel tread increase adhesion activator which shows the 2nd Example of this invention. It is a front view which shows the external shape of the non-contact-type wheel tread increase adhesion activator which shows the 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Iron wheel 2,12 Non-contact-type wheel tread increasing adhesion activator 3,13 Permanent magnet 4,14 Electromagnet which has a coil 5,15 Coil 6,16 The back panel (iron member) which comprises a part of magnetic path
7, 17 Non-magnetic mold member 11A Tread surface of iron wheel 18 Box 19 Waterproof cable 8, 20 Brush 21, 22, 24 Bolt 23 Non-magnetic casing 25 Coupling part of increased adhesion activator 26 Square hole formed in coupling part

Claims (5)

(A) a permanent magnet arranged to face the tread of the iron wheel;
(B) an electromagnet arranged to act on the magnetic field of the permanent magnet,
(C) The magnetic path of the permanent magnet and magnetic powder constitute a magnetic path, the magnetic path of the electromagnet is added to the magnetic path, and the tread of the iron wheel is heated by electromagnetic induction. A non-contact type wheel tread increasing adhesive activator characterized by lowering the kinematic viscosity of the water film by indirectly heating the surface water film and increasing the adhesive strength.   2. The non-contact type wheel tread increasing activator according to claim 1, wherein a high frequency magnetic field is generated in the electromagnet to increase the increasing adhesive force in a low speed rotation state or a stop state of the iron wheel. -Type wheel tread increasing adhesion activator.   2. The non-contact type wheel tread increasing activator according to claim 1, wherein a DC exciting magnetic field is generated in the electromagnet to increase the adhesive force in a high-speed rotation state of the iron wheel. Adhesive activator.   The non-contact type wheel tread increasing adhesive activator according to claim 1, 2, or 3, wherein the electromagnet and the permanent magnet are molded with a nonmagnetic mold member, and a back metal is fixed to the upper and lower surfaces of the nonmagnetic mold member. A non-contact type wheel tread increasing adhesive activator having a wire brush having magnetism on a wheel side.   5. A non-contact type wheel tread increasing adhesive activator according to claim 4, wherein a plurality of said electromagnets and permanent magnets are arranged in a lateral direction, and the magnetic path of said permanent magnets is switched by excitation of said electromagnets. Contact-type wheel tread increasing adhesive activator.

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