KR101671009B1 - Damper and axial spring for railway car using eddy current damping property - Google Patents

Damper and axial spring for railway car using eddy current damping property Download PDF

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Publication number
KR101671009B1
KR101671009B1 KR1020150058076A KR20150058076A KR101671009B1 KR 101671009 B1 KR101671009 B1 KR 101671009B1 KR 1020150058076 A KR1020150058076 A KR 1020150058076A KR 20150058076 A KR20150058076 A KR 20150058076A KR 101671009 B1 KR101671009 B1 KR 101671009B1
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South Korea
Prior art keywords
cylinder
conductor
delete delete
eddy current
circumferential surface
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KR1020150058076A
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Korean (ko)
Inventor
안다훈
허현무
박준혁
김남포
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한국철도기술연구원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/12—Bolster supports or mountings incorporating dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
    • B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The present invention relates to a damper and an axial spring for a railway vehicle using an eddy current damping characteristic, and has a weak point of a conventional hydraulic damper having weaknesses such as a characteristic change due to temperature, a danger of leakage, and a life limit by adding an eddy current attenuation characteristic using a magnet and a conductor Can be improved, and maintenance can be easily performed. The axial spring of the conventional coil spring type having only the rigidity characteristic can be integrally formed by applying the damping characteristic, and the vibration reduction effect can be obtained around the resonance point. A damper for a railway vehicle and an axial spring are provided.

Description

[0001] DAMPER AND AXIAL SPRING FOR RAILWAY CAR USING EDDY CURRENT DAMPING PROPERTY [0002]

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a damper and an axial spring for a railway vehicle using an eddy current damping characteristic, and more particularly to a damper for a railway vehicle and a damper for a railway vehicle using a damping force generated by an eddy current generated in a conductor, .

Generally, a damper for a railway vehicle is a component that is mounted between a wheel shaft and a bogie, or between a bogie and a vehicle body, and generates a damping force during relative motion between the wheel shaft and the bogie or bogie.

An example of a damper for a conventional railway vehicle is shown in Fig. According to this, a damper for a railway vehicle is a hydraulic damper which utilizes the hydraulic pressure of the oil in the cylinder, and the fluid resistance generated by the oil flowing out through the orifice due to the reciprocating motion of the piston generates a damping force. However, such a conventional hydraulic damper has a risk of leakage in the cylinder, and when the viscosity is lowered due to repetitive motion of the damper, the damping force characteristic changes with time. Since the viscosity of the oil changes with temperature, the damping force characteristic of the damper also changes due to the characteristics of the railway vehicle exposed to the external environment.

On the other hand, an example of a primary suspension installed between a bogie frame of a railway car and an axle box has been proposed in a public utility model 1998-026320. 2, the axial spring of the coil spring type is mounted on the front and rear of the axle box to support the load of the bogie frame and to reduce the vibration of the high frequency transmitted from the axle box to the bogie . However, since such a coil spring type axial spring has only rigidity characteristics, it can not have a vibration reduction function in a relatively low frequency region near the resonance point.

Therefore, a hydraulic damper as shown in FIG. 1 is installed at a certain position of the railway car to generate a damping force, or a rubber member is attached to an axial spring of a coil spring type as shown in FIG. 3 In addition, a damping force is generated. Since the axial spring shown in FIG. 3 has a rigidity property by itself, the axial spring can be constituted by only the rubber member as shown in FIG. 4 to perform the function of supporting the body and generating the damping force.

However, when a hydraulic damper is applied to an axial spring of a coil spring type, there is still a risk of leakage in the cylinder, and when a rubber member is applied to a coil spring type axial spring or a rubber spring is used for axial support, There is a disadvantage that it is difficult to predict the life time limit due to deterioration and the characteristics in the design process.

Reference 1: Public utility model room 1998-026320 Reference 2: Registration No. 10-1177337

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a railway vehicle which is free from the influence of changes in ambient temperature, humidity, And to provide a dampers and an axial spring for a railway vehicle that use an eddy current damping characteristic that can be easily maintained.

The present invention also provides an eddy current method using a damping force generated by an eddy current generated in an electrically conductive object when a magnetic field is formed in a space by a permanent magnet and an electrically conductive object lying on the same space has a velocity with respect to a magnetic field It is an object of the present invention to provide a dampers and an axial spring for a railway vehicle using dampers, which do not use oil as compared with existing hydraulic dampers, and which are free from the risk of leakage and can be semi-permanently used,

In order to solve such a technical problem,

An outer tube which is inserted so as to be guided in the longitudinal direction by being inserted into one end of the outer tube or the inner tube which is opened at one end of the inner tube; The present invention provides a damper for a railway vehicle using eddy current damping characteristics.

At this time, the inner cylinder has a cylindrical shape and one end is opened, and the outer cylinder has a cylindrical shape so that one end is opened and the inner cylinder can move.

A magnet portion is mounted on an outer circumferential surface of a rod protruding in an axial direction at an inner center of the outer cylinder, and a conductor is provided on the inner circumferential surface of the inner tube to correspond to the magnet portion.

In addition, the magnet portion is characterized in that a plurality of square-shaped permanent magnets are alternately arranged in a lattice pattern such that N poles and S poles cross each other with the rod as a center.

In addition, the magnet portion is characterized in that ring-shaped permanent magnets are arranged in a laminated manner with the polarities being opposite to each other with respect to the rod.

The magnet portion is arranged in the same polarity when a plurality of square-shaped permanent magnets are arranged concentrically with respect to the rod, and is arranged in a checkerboard shape with a polarity opposite to that of the rod in the longitudinal direction.

Further, the rod to which the magnet portion is supported is made of a ferromagnetic material.

The inner cylinder or the outer cylinder in which the conductor is installed is characterized by being made of a semi-magnetic and conductive material for increasing the damping force.

In addition, the length of the conductor in the direction of motion is longer than that of the magnet portion.

In addition, a first connecting portion is provided at the other end of the inner cylinder, and a second connecting portion is provided at the other end of the outer cylinder.

The first connecting part includes a first extending part provided at the other end of the inner tube, and a first rotating joint mounted on an end of the first extending part and coupled with the first connecting pin;

And the second connecting part includes a second extending part provided at the other end of the outer barrel and a second rotating joint mounted at an end of the second extending part and fastened with the second connecting pin.

The present invention also provides

An outer cylinder provided vertically upwardly to the axle box of the railway car and installed to guide the inner cylinder, an upper end supported by an upper flange formed on an outer circumferential surface of the upper end of the inner cylinder, A coil spring supported by a lower flange formed on a lower end peripheral face of the outer cylinder to absorb an impact transmitted from the wheel and an eddy current damper installed between the inner passage outer cylinder and generating a damping force due to an eddy current during relative motion of the inner- And an axial spring for a railway vehicle using the eddy current damping characteristic.

At this time, the eddy current damper portion is constituted by a magnet portion mounted on the outer tube, and a conductor provided on the inner tube.

In addition, the magnet portion is mounted on the outer circumferential surface of the rod protruding upward in the center of the outer cylinder, and a conductor is provided on the inner circumferential surface of the inner tube to correspond to the magnet portion.

The eddy current damper portion is constituted by a magnet portion mounted on the inner cylinder and a conductor provided on the outer cylinder.

In addition, the conductor is mounted on the outer circumferential surface of the rod projecting upward from the center of the outer cylinder, and a magnet portion is provided on the inner circumferential surface of the inner tube to correspond to the conductor.

The magnet portion arranges a plurality of permanent magnets so that the magnetic flux changes in the direction of relative movement of the inner-

The conductor is characterized in that it is composed of a composite material using a metal such as silver, copper, gold, aluminum or graphene, which has high electrical conductivity.

In addition, the length of the conductor in the direction of motion is longer than that of the magnet portion.

Further, the present invention is further characterized in that the abrasion plate is further provided for attenuating vibration in the vertical direction while sliding friction occurs in the up-and-down direction of the inner-pass barrel relative motion.

In order to prevent dust or foreign matter from flowing into the inner cylinder through the upper end of the outer cylinder, the outer cylinder is supported by an upper flange formed on an outer circumferential surface of the upper end of the inner cylinder, and a dust cover covers the upper outer circumferential surface of the outer cylinder.

The dust cover may further protrude from the outer circumferential surface of the outer tube to minimize a gap between the dust cover and the outer tube.

The damper and the axial spring for a railway vehicle according to the present invention can improve a conventional hydraulic damper having a weak point such as a characteristic change due to temperature, Type axial spring can be formed integrally by applying the damping characteristic and the vibration reduction effect can be obtained in the vicinity of the resonance point, so that there is an advantage that additional additional damper is not required.

In addition, such an eddy current damper function can be applied to various kinds of dampers such as a first vertical damper of a railway car, a second vertical, horizontal, horizontal, rear damper, and a body damper. And can be widely applied.

FIG. 1 is a view showing an installation state of a hydraulic damper and its hydraulic damper as an example of a conventional damper.
2 (a) and 2 (b) are diagrams for explaining the structure of a conventional coil spring type axial spring assembly and its axial spring.
FIG. 3 is a view for explaining a coil spring type axial spring structure to which a conventional rubber member is added.
4 is a view for explaining an axial spring structure using rigidity and damping of a rubber member.
5 is a view showing a damper structure using an eddy current damping characteristic according to the present invention.
6 (a) to 6 (c) are views showing permanent magnet array structures for forming a magnetic field of a damper for a railway car using an eddy current damping characteristic according to the present invention.
7 is a view showing an embodiment of a damper for a railway vehicle using the eddy current damping characteristic according to the present invention.
8 is a view illustrating an axial spring using an eddy current damping characteristic according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which a damper for a railway vehicle and an axial spring using an eddy current damping characteristic according to the present invention are illustrated.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

The present invention performs the function of a damper using the principle of eddy current.

First of all, the principle of eddy current generation is as follows. First, when a coil is wound around a metal conductor and a magnet is moved close to the coil, a current flows without supplying power to the coil, and the direction of the generated current is formed to obstruct the movement of the magnet. At this time, when the N pole approaches, an N pole is formed on the left side of the coil since a current should flow in a direction to obstruct approaching, that is, a direction pushing out the magnet. On the contrary, when it goes away, the S pole is formed because the magnet must be pulled out. As a result, the direction of the current changes every time the magnet reciprocates. This phenomenon also occurs when the magnet moves on a metal plate that does not stick to a magnet such as aluminum, copper, or the like. When the magnet moves, the magnetic field penetrates the metal plate.

However, a magnetic field penetrating a portion closer to the magnet becomes large, and a magnetic field is reduced in a portion where the magnet moves away. When the intensity of the magnetic field changes in this manner, an eddy current flows through the metal plate. At this time, a current flows in a counterclockwise direction so as to interfere with the increase of the magnetic field, and a current flows in a clockwise direction so that the distant portion interferes with the decrease of the magnetic field. As a result of this eddy current, a new magnetic field appears, so that the metal plate becomes a single magnet. However, since the eddy currents appearing on the left and right sides of the metal plate are opposite to each other, the poles of the magnet are opposite to each other.

Referring to FIG. 5, the damper 100 for a railway vehicle using the eddy current damping characteristic according to the present invention is based on the principle of eddy current, and is mounted between a shaft and a bogie or between a bogie and a vehicle body, And the inner cylinder 110 is inserted into the outer cylinder 120 for movement.

The damper 100 for a railway vehicle using the eddy current damping characteristic according to the present invention has an inner tube 110 with one end opened and an outer tube 120 inserted into one end of the inner tube 110, A magnet unit 130 mounted on the outer cylinder 120 or the inner cylinder 110 and a conductor 140 installed on the inner cylinder 110 or the outer cylinder 120.

Hereinafter, the configuration of each part will be described in detail.

The inner cylinder 110 has a cylindrical shape and has an open end. The outer cylinder 120 has a cylindrical shape such that one end thereof is open and the inner cylinder 110 can move.

More specifically, a magnet portion 130 is mounted on an outer circumferential surface of a rod 122 protruding in an axial direction at an inner center of the outer tube 120, and the magnet portion 130 is provided on an inner circumferential surface of the inner tube 110, An electric current is generated in the relative movement of the inner tube 110 and the outer tube 120.

The conductor 140 is mounted on the outer circumferential surface of the rod 122 protruding in the axial direction at the center of the inner circumferential surface of the outer tube 120. The conductor 140 is mounted on the inner circumferential surface of the inner tube 110, (130) may be installed.

Particularly, the inner cylinder 110 or the outer cylinder 120 in which the conductor 140 is installed may be made of various materials. However, it is preferable that the inner cylinder 110 or the outer cylinder 120 is made of a semiconducting material or a conductive material to increase the damping force. .

On the other hand, when the rod 122 to which the magnet unit 130 is supported is made of a ferromagnetic material such as iron, a high damping force can be obtained.

Further, it is also preferable to protect the magnet unit 130 through a separate molding or the like for protecting the magnet unit 130 from damage due to an external impact or the like.

According to such a configuration, when a magnetic field is formed in space by the magnet portion 130 and a conductor 140, which is an electrically conductive object placed in the same space, has a velocity with respect to a magnetic field, an eddy current A damping force is generated by the damping force, and the vibration reduction effect can be obtained. It does not use oil as compared with existing hydraulic dampers, so there is no danger of leakage and semi-permanent use is possible, which makes maintenance easy.

At this time, the magnet unit 130 arranges a plurality of permanent magnets such that the magnetic flux changes in the direction of relative motion between the inner cylinder 110 and the outer cylinder 120, and the conductor 140 is made of silver, copper, Gold, aluminum, or a composite material using graphene or the like.

In addition, the length of the conductor 140 in the direction of motion is longer than that of the magnet unit 130, and the same damping force characteristic can be obtained at the same speed condition regardless of the occurrence of the displacement due to the relative motion. In this case, the displacement due to the relative motion is determined by the vibration amount of the railway vehicle, the curve running characteristic, the variable load of the vehicle body, etc., and the length of the magnet portion 130 and the conductor 140 is determined in consideration of the displacement.

Meanwhile, the magnet unit 130 should be configured such that the space in which the magnetic field is formed by the permanent magnet affects the conductor 140, and at the same time, magnetic leakage does not occur in the space outside the conductor 140. The array structure of the permanent magnets may be variously shaped as shown in FIG.

6A shows a structure in which a plurality of square-shaped permanent magnets are alternately arranged in a lattice shape so as to intersect the N-poles and the S-poles, with the rod 122 as a center, wherein the magnetization direction of the magnet is the r- 6 (b) shows a structure in which ring-shaped permanent magnets are arranged around a rod 122, and the magnet portion 130 is formed by arranging a ring-shaped permanent magnet around the rod 122, (C) of FIG. 6 shows the same polarity (for example, N pole) when a plurality of square-shaped permanent magnets are arranged concentrically around the rod 122 And a square plate-like permanent magnet having a polarity opposite to that of the rod in the longitudinal direction (for example, S pole) is arranged in a concentric manner, and the magnetization direction of the magnet is the r direction.

As described above, an eddy current is generated due to a change in the magnetic flux according to the movement of the conductor 140 in the magnetic field formed by alternately arranging the poles of the permanent magnets constituting the magnet unit 130 alternately.

At this time, the generation of the eddy current is caused by the change of the relative position of the magnetic field and the conductor 140, so that the positions of the magnet portion 130 and the conductor 140 can be mutually changed. That is, the magnet portion 130 can be attached to the inner cylinder 110, and the conductor 140 can be attached to the outer cylinder 120.

As shown in FIG. 7, the damper 100 for a railway vehicle using the eddy current damping characteristics has first and second connection portions 150 and 160 at both ends thereof so as to be easily mounted on the railway vehicle. That is, the first connection part 150 is provided at the other end of the inner barrel 110, and the second connection part 160 is provided at the other end of the outer barrel 120.

The first connection part 150 includes a first extension part 152 provided at an end of the inner tube 110 and a first connection pin 154 mounted at an end of the first extension part 152, And a first rotary joint 156 to be fastened.

The second connection unit 160 includes a second extension unit 162 provided at an end of the outer casing 120 and a second connection pin 164 mounted at an end of the second extension unit 162, And a second rotary joint 166 to which the second rotary joint 166 is connected.

The degree of the damping force due to the eddy current is adjustable through the size of the damping control slot 123 formed along the longitudinal direction of the conductor 140.

That is, as the number of the damping control slots 123 increases, the damping force decreases as the width of the damping control slot 123 increases, so that the damping force can be adjusted according to the number and size of the damping control slots 123.

According to this structure, for example, the first connection unit 150 may be connected to a vehicle body of a railway vehicle, and the second connection unit 160 may be connected to a railway vehicle to generate a damping force during operation of the railway vehicle.

8 is a view for explaining an axial spring for a railway vehicle using an eddy current damping characteristic according to the present invention, in which the lower end is connected on the axis of a railway vehicle through an axial connection portion, The damper function having the eddy current damping characteristic is added to the axial spring connected to the bogie frame to improve the life of the conventional hydraulic damper and to improve the life and maintenance.

The axial spring 200 for a railway vehicle using the eddy current damping characteristic according to the present invention has a structure in which a damper function is integrally applied to an axial spring that can be installed between a bogie frame and an axle box of a railway vehicle, An outer cylinder 220 vertically installed on the axle box so as to guide the inner cylinder 210 and a plurality of outer cylinders 220 installed on the inner cylinder 210 and the outer cylinder 220, A wear plate 230 for absorbing vibration in the vertical direction while sliding friction is generated in a vertical direction of the inner cylinder 210 and an upper flange 212 formed on an outer circumferential surface of the upper end of the inner cylinder 210, A coil spring 240 which is supported by a lower flange 222 formed on a lower outer circumferential surface of the inner casing 220 and absorbs impact transmitted from the wheels of the railway car, It consists of the inner tube 210 and outer tube eddy current damper unit 250 for generating the damping force by the eddy current upon relative movement in the vertical direction of 220.

At this time, the eddy current damper unit 250 may be independently installed between the wheel shaft of the railway car and the car or between the car and the car body to generate a damping force during relative movement between the wheel shaft and the car or the car.

Hereinafter, the function of each part of the axial spring 200 for a railway vehicle using the eddy current damping characteristic according to the present invention will be described in detail.

The axial spring 200 for a railway vehicle using the eddy current damping characteristic according to the present invention can be installed between a bogie frame and an axle box of a railway vehicle and includes an inner cylinder 210 vertically downwardly installed on the bogie frame, And an outer cylinder 220 vertically upwardly installed on the axle box and installed to guide the inner cylinder 210.

The inner cylinder 210 has a cylindrical shape and a central lower portion is opened. An upper flange 212 protrudes horizontally from an upper outer circumferential surface of the inner cylinder 210, And has a structure in which a central upper portion is opened, and a lower flange 222 is horizontally protruded from the lower end peripheral face.

The abrasion plate 230 is in close contact with the inner tube 210 and the outer tube 220 so that the inner tube 210 and the outer tube 220 are slid against each other during vertical movement, do.

A coil spring 240 is mounted on the outer surface of the outer cylinder 220. The upper end of the coil spring 240 is supported by an upper flange 212 formed on an upper outer circumferential surface of the inner cylinder 210, 220 to absorb a shock transmitted from the wheel.

The outer tube 220 is supported on an upper flange 212 formed on the outer circumferential surface of the inner tube 210 to prevent dust or foreign matter from flowing into the inner tube 210 through the upper end of the outer tube 220, A dust cover 260 is provided on the outer circumference of the outer cylinder 220 so as to protrude from the outer circumference of the upper end of the outer cylinder 220 to minimize the gap between the dust cover 260 and the outer cylinder 220, .

According to this structure, the inner cylinder 210 and the outer cylinder 220 relatively move in the vertical direction between the bogie frame and the axle box due to the running of the railway vehicle, and the inner cylinder 210 and the outer cylinder 220 To minimize the inflow of foreign matter such as dust and oil mist through the gap between the two.

The eddy current damper unit 250 has the same principle as the damper 100 shown in FIG. 5 and includes a magnet unit 252 mounted on the outer cylinder 220 or the inner cylinder 210, the inner cylinder 210 Or a conductor 254 provided on the outer cylinder 220. [

More specifically, the magnet portion 252 is mounted on the outer circumferential surface of the rod 222 protruding upward from the inner center of the outer tube 220, and the magnet portion 252 is provided on the inner circumferential surface of the inner tube 210 A conductor 254 is installed so that an eddy current is generated when the inner tube 210 and the outer tube 220 are relatively moved in the vertical direction.

The conductor 254 is mounted on the outer circumferential surface of the rod 222 protruding upwards from the center of the outer tube 220 and the inner circumferential surface of the inner tube 210 is connected to the magnet 252 Can be installed.

In particular, the magnet portion 252 is supported by a rod 222 installed vertically upward at the center of the outer cylinder 220. When the rod 222 is made of a ferromagnetic material such as iron, a high damping force is obtained . It is also preferable to protect the magnet portion 252 through a separate molding or the like for protecting the magnet portion 252 from damage by an external impact or the like.

According to such a configuration, when a magnetic field is formed in space by the magnet portion 252 and the conductor 254, which is an electrically conductive object placed in the same space, has a velocity with respect to the magnetic field, the eddy current The damping force is generated by the damping force, and the vibration reduction effect can be obtained.

At this time, the magnet part 252 arranges a plurality of permanent magnets such that the magnetic flux changes in the direction of relative movement of the inner tube 210 and the outer tube 220, and the conductor 254 is made of silver, copper, Gold, aluminum, or a composite material using graphene or the like.

Of course, the inner tube 210 or the outer tube 220 where the conductor 254 is installed may be made of various materials, but it is preferable that the conductor 254 is formed of a material having a magnetic property and a conductive property in order to increase the damping force. .

The length of the conductor 254 in the direction of motion is longer than that of the magnet 252, and the same damping force characteristic can be obtained at the same speed condition regardless of the occurrence of the displacement due to the relative motion. In this case, the displacement due to the relative motion is determined by the vibration amount of the railway vehicle, the curve running characteristics, the variable load of the vehicle body, etc., and the length of the magnet portion 252 and the conductor 254 are determined in consideration of this.

The axial spring 200 according to the present invention is connected on the axle of the railway vehicle through the axial connection portion 221 at the lower end of the outer cylinder 220 and connected to the truck via the bogie coupling portion 211 at the upper end of the inner cylinder 210 .

7 and 8, the damper 100 and the coil spring 200 mounted between the respective connecting parts of the railway car are connected in parallel to each other so that the relative displacement of the inner tubes 110, 210 and the outer tubes 120, That is, the relative displacement and the relative speed on the bogie and the shaft, and the vibration is reduced by applying the restoring force and the damping force.

With this structure, the weak point of the conventional hydraulic damper can solve the problems such as oil leakage, and is advantageous in that it can be used semi-permanently without a constant damping characteristic and deterioration as compared with the rubber spring type axial spring.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The scope of protection of the present invention should be construed under the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

100: damper 110: inner tube
120: outer tube 130: magnet part
140: conductor 150: first connection
160: second connecting portion 200: axial spring
210: inner cylinder 211:
220: Outer bar 221: Axial connection
230: wear plate 240: coil spring
250: eddy current damper part 252: magnet part
254: conductor 260: dust cover
262: dust cover

Claims (21)

An outer tube which is inserted so as to be inserted into one end of the inner tube opened so as to be guided in the longitudinal direction, a magnet portion which is mounted on the outer tube or the inner tube, and an outer tube which is provided in the inner tube or the outer tube Conductor,
A magnet portion is mounted on an outer circumferential surface of a rod protruding in an axial direction at an inner center of the outer cylinder, a conductor is provided on an inner circumferential surface of the inner tube to correspond to the magnet portion,
Wherein the magnet portion is disposed in the same polarity when a plurality of square-shaped permanent magnets are arranged concentrically with respect to the rod, and arranged in a checkerboard shape with a polarity opposite to that of the rod in the longitudinal direction,
The rod to which the magnet portion is supported is made of a ferromagnetic material, and the inner cylinder or the outer cylinder to which the conductor is installed is made of a semi-
The length of the conductor in the direction of motion is longer than that of the magnet portion,
Wherein the first connection part is provided at the other end of the inner cylinder and the second connection part is provided at the other end of the outer cylinder.
The method according to claim 1,
Wherein the inner cylinder has a cylindrical shape and one end is opened, and the outer cylinder has a cylindrical shape so that one end thereof is opened and the inner cylinder is movable.
delete delete delete delete delete delete delete delete The method according to claim 1,
Wherein the first connection part comprises a first extension part provided at the other end of the inner tube and a first rotation joint mounted at an end of the first extension part and fastened with the first connection pin;
Wherein the second connecting portion comprises a second extending portion provided at the other end of the outer barrel and a second rotating joint mounted at an end of the second extending portion and fastened with the second connecting pin. Vehicle dampers.
An outer cylinder provided vertically upwardly to the axle box of the railway car and installed to guide the inner cylinder, an upper end supported by an upper flange formed on an outer circumferential surface of the upper end of the inner cylinder, A coil spring which is supported by a lower flange formed on a lower end peripheral face of the outer cylinder to absorb an impact transmitted from the wheel and an eddy current damper installed between the inner passage outer cylinder and generating a damping force due to an eddy current during relative motion of the inner- ≪ / RTI >
Wherein the eddy current damper portion comprises a magnet portion mounted on the outer tube and a conductor provided on the inner tube, the magnet portion being mounted on an outer circumferential surface of a rod protruding upward in an inner center of the outer tube, A conductor is provided so as to correspond to the electrode,
Wherein the magnet portion comprises a plurality of permanent magnets arranged such that the magnetic flux changes in a direction of relative movement of the inner passage outer cylinder, and the conductor is composed of a composite material made of a metal such as silver, copper, gold, aluminum or graphene having high electrical conductivity And,
The length of the conductor in the direction of motion is longer than that of the magnet portion,
And an abrasion plate for attenuating vibrations in the vertical direction while sliding friction occurs in the up-and-down direction relative to the inner-
And a dust cover covering the outer circumferential surface of the outer cylinder, the outer circumferential surface of the outer cylinder being surrounded by an upper flange formed on an upper outer circumferential surface of the inner cylinder so as to prevent dust or foreign matter from flowing into the inner cylinder through an upper end of the outer cylinder. Axial springs for railway vehicles.
delete delete delete delete delete delete delete delete 13. The method of claim 12,
And a dust film protruding from the outer circumferential surface of the outer cylinder for minimizing a gap between the dust cover and the outer tube.
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CN107244331A (en) * 2017-06-14 2017-10-13 西南交通大学 What a kind of conical rubber pile was combined with permanent magnetic spring two is resilient suspension vibration absorber
KR20190022031A (en) * 2017-08-25 2019-03-06 노바센(주) Highly Sensitive Checkweigher including a Linear Actuator with a Built-in Damper Function and Operating Method Thereof
CN110005738A (en) * 2018-01-05 2019-07-12 中唐空铁科技有限公司 A kind of magnetic spring for rail traffic
CN110848304A (en) * 2019-09-25 2020-02-28 山东交通职业学院 Permanent magnet automobile damping system
KR20200052916A (en) * 2017-09-13 2020-05-15 닛폰세이테츠 가부시키가이샤 Eddy current damper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107244331A (en) * 2017-06-14 2017-10-13 西南交通大学 What a kind of conical rubber pile was combined with permanent magnetic spring two is resilient suspension vibration absorber
KR20190022031A (en) * 2017-08-25 2019-03-06 노바센(주) Highly Sensitive Checkweigher including a Linear Actuator with a Built-in Damper Function and Operating Method Thereof
KR101996036B1 (en) * 2017-08-25 2019-07-04 노바센(주) Highly Sensitive Checkweigher including a Linear Actuator with a Built-in Damper Function and Operating Method Thereof
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CN110005738A (en) * 2018-01-05 2019-07-12 中唐空铁科技有限公司 A kind of magnetic spring for rail traffic
CN110005738B (en) * 2018-01-05 2024-05-28 黑冻科技有限公司 Magnetic spring for rail transit
CN110848304A (en) * 2019-09-25 2020-02-28 山东交通职业学院 Permanent magnet automobile damping system

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