KR100659708B1 - The bogie traveling stability device for using mr fluid and the method thereof - Google Patents

Abstract

A bogie traveling stability device using MR fluid and a method thereof are provided to secure curve following performance to perform curve travelling smoothly. In a bogie traveling stability device using MR fluid, a variable fluid damper(110) suppresses straight travelling by damping force, and is installed at both ends of a bogie(100) symmetrically between an axle box(103) and a bogie frame(106). A damper controller turns the variable fluid damper on/off according to straight or curve travelling. A sensor(120) transfers a signal to the damper controller to operate the variable fluid damper in case of the straight travelling. The variable fluid damper is an MR fluid damper having a structure that magnetic particles in a solvent are paralleled with a magnetic field.

Description

{The bogie traveling stability device for using MR fluid and the method}

1 is a configuration diagram schematically showing a conventional self steering bogie.

Figure 2 is a front view schematically showing a bogie for a railway vehicle to which the present invention is applied.

Figure 3 is a plan view of the trolley bogie for the present invention is applied.

Figure 4 is an operational state diagram of the MR fluid according to the magnetic field formation of the variable fluid damper of the present invention.

5 is a flow chart showing a control process of the variable fluid damper according to the present invention.

6 and 7 is a state diagram showing the operating state of the variable fluid damper according to the running state of the railway vehicle.

Explanation of symbols on the main parts of the drawings

100. Balance 101. Wheelset

102. Axle 103. Axle box

104. Wheel 105. Coil spring

106. Balance frame 107. Air spring

110. Variable fluid damper 111. Cylinder

112. Rod 113, 114. Fixed bracket

120. Sensor

The present invention relates to a trolley travel stabilization device and a driving safety method using an MR fluid, and more particularly, a variable fluid damper, which is a traveling stabilization device filled with MR fluid, is provided between a wheelset and a frame of a railway vehicle bogie. In this way, the damping force of the variable fluid damper during the linear trajectory driving of a railway vehicle, that is, the damping force generated by the magnetic field formed by the magnetic particles in the non-conductive solvent filled with the power supply, suppresses the meandering motion caused by the linear driving. Balance driving stabilizer (hereinafter referred to as balance driving stabilizer) and driving using MR fluids such as stability of high-speed running on track and smooth curve following performance on curved tracks It is about safety methods.

In general, in the case of a trolley applied to a railway vehicle, a device for supporting the weight of the vehicle body and at the same time to distribute the weight of the vehicle body evenly on each wheel, and to change the direction freely with respect to the vehicle body to smoothly run the railway vehicle As the general bogie and the steering bogie, the general bogie aligns the axles to minimize the attack angle of the wheel approaching the track by the wheel / rail creep force generated when driving the curved track. Is strongly constrained to reduce the curve followability.

In addition, in the case of the steering bogie, the bogie configured to improve the curve turning performance when the curve passes, the anti-force steering bogie, the forced steering bogie, and the self-steering bogie ( In this case, the semi-forced steering bogie is a bogie that allows the attack angle of the wheelset to be zero by applying a link mechanism that inputs a turning angle between the body and the bogie, and the forced steering bogie. In this case, it is a bogie that turns wheels on the bogies or bogies to the car body by driving the actuator by a power source such as hydraulic pressure. In the case of the self-steering bogie, the front and rear stiffness of the primary suspension system installed at both ends of the wheel bogie is used. It is a bogie to allow self-steering of wheelsets.

At this time, when explaining the steering wheel of the steering cart divided as described above is as follows.

In the case of the conventional magnetic steering trolley 10 in which the steering wheel 11 has self steering by using the front and rear stiffness of the primary suspension system, as shown in FIG. 1, the front and rear sides and the axle box of both ends of the wheel shaft 11 are shown. It is composed of a configuration in which the shaft springs (14, 15), that is, the rigid suspension shafts (14, 15), respectively, are installed in the primary suspension system, respectively, and thus the curved track of the railway vehicle to which the above-described self steering bogie (10) is applied. The flexibility of the shaft springs 14 and 15 during driving allows the wheels 12 / rail creep force generated during curved driving to minimize the attack angle of the wheels 12 approaching the track. The smooth curve following is achieved by minimizing the restraint force.

However, in the case of the conventional self steering bogie 10, the rigidity of the shaft springs 14 and 15 provided on both the front and rear sides of the wheel 11 and the axle box is flexible, so that smooth curve followability can be obtained when driving the curved track as described above. In this case, the axle 13 and the bogie are moved in a zigzag manner by changing the contact point between the tread face of the wheel 12, which forms an inclined plane from the flange, and the rail face of the wheelset 11 installed on both sides of the bogie. In addition to the problem that the behavior becomes severe, there is a big problem such that the driving stability due to the driving behavior is greatly reduced.

In addition, in the case of the conventional self-steering bogie 10, as described above, since the running stability is greatly reduced while driving in a straight track orbit, the self-steering bogie 10 can be used only for a low-speed vehicle. In addition, there was a problem that is difficult to apply to high-speed vehicles.

In addition, when the conventional self steering vehicle 10 is applied to a high speed vehicle as described above, the fluctuation of the vehicle body C becomes very large with respect to the four-way movement, and the ride comfort is greatly reduced. In addition to the problem, when the fluctuation of the vehicle body C with respect to the four-way movement increases, there are also problems such as wear of the wheel 12 and damage to the rail, leading to derailment of the vehicle, causing a large accident.

The present invention devised to solve the above problems, the variable fluid damper, which is a traveling stabilizer filled with MR fluid between the wheelset and the frame of the railway vehicle bogie, by configuring the variable, when running on a straight track of the railway vehicle The damping force of the fluid damper, ie, the damping force of the magnetic particles in the filled non-conductive solvent, is arranged in parallel by the magnetic field formed by the power supply, thereby suppressing the meandering motion of the linear driving. In addition to improving the stability, the purpose is to increase the running speed in a straight run.

In addition, the variable fluid damper has another object to achieve smooth curve driving by securing a curve following performance on a curved track as in the conventional self steering vehicle.

Furthermore, when the variable fluid damper is applied to a general bogie, the critical speed of the bogie can be improved through the variable fluid damper, and in particular, the curve steering performance and the linear running stability of the general bogie can be achieved through the variable fluid damper. Since it is possible to overcome the double rate characteristic, there is another purpose to effectively use a variable fluid damper in a tilting vehicle as well as an urban railway vehicle that runs a line mixed with a straight line and a sharp curve.

In the trolley | bogie running stabilizer of this invention, In the trolley | bogie for railroad cars provided with the wheel shaft in the front and back both sides of the trolley frame;

A variable fluid damper installed between the wheel shaft and the bogie frame and configured to generate a damping force by supplying power, thereby suppressing a meandering motion in a straight line;

Characterized in that the damper control device for controlling the variable fluid damper is turned on (ON) / off (OFF) according to the straight or curved running of the railway vehicle.

In addition, the upper end of the bogie frame is characterized in that the sensing sensor for transmitting a signal to the damper control device to detect the driving state of the straight line or curve of the railway vehicle to operate the variable fluid damper according to the straight running.

And, the variable fluid damper is characterized in that installed on both sides of the bogie symmetrically.

In addition, the variable fluid damper is characterized in that the MR fluid damper having a structure in which the magnetic particles in the solvent are arranged in parallel with the magnetic field by the magnetic field formed by the power supply.

On the other hand, the vehicle driving safety method according to the present invention is a vehicle traveling stability method using a trolley traveling stabilizer consisting of an MR fluid damper, a damper control device, and a sensor, the railroad vehicle through a sensor installed on the upper end of the bogie frame Detecting a driving state of the vehicle; Filtering a signal transmitted from the detection sensor to a damper control device; Determining a straight or curved driving state of a railway vehicle through a signal transmitted to the damper control device; Supplying power to the MR fluid damper during linear driving of the railway vehicle by the determining step; Increasing the attenuation coefficient while the magnetic particles in the solvent are arranged in parallel with the magnetic field by the magnetic field formed by the power supply; It characterized in that it is configured to suppress the four-way motion of the railway vehicle, including the step of having a damping force for the four-way movement of the railway vehicle when the linear driving through the step of increasing the damping coefficient.

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EMBODIMENT OF THE INVENTION Hereinafter, the trolley | bogie running stabilizer of this invention is demonstrated in detail.

Figure 2 is a front view schematically showing a railway vehicle bogie to which the present invention is applied, Figure 3 shows a plan view of a railway vehicle bogie to which the present invention is applied, Figure 4 is a magnetic fluid of the magnetic fluid formation of the variable fluid damper of the present invention It shows the operation status.

Prior to describing the configuration of the vehicle traveling stabilizer of the present invention, the MR fluid filled in the variable fluid damper of the traveling stabilizer will be described as follows.

The MR fluid is a non-colloidal solution in which particles capable of having a magnet of micron size are dispersed in a non-conductive solvent such as silicone oil or mineral oil as a “magnetic rheology fluid”, as shown in FIG. 4A. Likewise, when the magnetic field is not loaded, the dispersed particles have Newtonian fluid properties. However, as shown in FIG. 4B, when the magnetic field is loaded, the dispersed particles are polarized, and fibers are dispersed in a direction parallel to the loaded magnetic field. It refers to a fluid that is formed and has a resistance to shear or flow.

Meanwhile, in the present invention, the variable fluid damper 110 is formed by filling the MR fluid of the above-described properties, and the axle box 103 and the bogie frame of both sides of the bogie 100, that is, the bogie 100, are provided. By symmetrically applied between the 106, the driving safety of the vehicle 100 according to the present invention, that is, can achieve a characteristic effect that can suppress the meandering movement of the wheel 104 generated during the straight running of the railway vehicle, In this case, a description will be given of the railway vehicle bogie 100 to which the variable fluid damper 110 is applied.

As described above, the railway vehicle trolley 100 to which the present invention is applied is a conventional trolley, not a conventional self steering trolley 10, including a wheel shaft 101 and a wheel axle 102; An axle box (103) in which bearings (not shown) are built so as to support journal portions at both ends of the axle (102) and to be rotatable; A bogie frame (106) seated and fixed at the top of the axle box (103); A primary suspension device installed between the bogie frame 106 and the axle box 103 to primarily attenuate the vibration transmitted from the wheel 104; It is installed in the upper center portion of the bogie frame 106, and the vehicle body (C) is connected to and fixed to the upper end of the secondary suspension device for attenuating the vibration transmitted to the vehicle body (C).

In this case, a coil spring 105, a chevron spring, a rubber spring, and the like are used as the primary suspension device, and an air spring 107, a coil spring, and the like are used as the secondary suspension device.

A damping force is provided between the axle box 103 at both ends of the wheel shaft 101 and the bogie frame 106 of the railroad vehicle bogie 100 configured as described above. Is generated to control the variable fluid damper 110 to suppress the meandering motion of the wheels 104 generated when the vehicle runs linearly, and the damper control to control the variable fluid damper 110 on or off. An apparatus (not shown) is provided, and the variable fluid damper 110 and the damper control apparatus will be described in detail as follows.

2 and 3, the variable fluid damper 110 of the trolley traveling stabilizer of the present invention has an MR fluid damper having a structure in which magnetic particles in a solvent are arranged in parallel with the magnetic field by a magnetic field formed by a power supply. As a cylinder 111 is filled with MR fluid inside; A rod 112 interpolated in the cylinder 111 and having a variable length by magnetic particles in the MR fluid arranged in parallel according to magnetic field formation; A fixing bracket coupled to a hinge 115 at one end of the cylinder 111 and the rod 112 so that the variable fluid damper 110 is installed and fixed between the axle box 103 at both ends of the wheel shaft 101 and the bogie frame 106. It consists of (113,114).

In addition, in the case of the variable fluid damper 110, four per one of the bogie 100 so as to be symmetrical between each side of the bogie 100, that is, each axle box 103 of the bogie 100 and the bogie frame 106. Variable fluid damper 110 is provided.

In the damper control device, the damper control device is connected to the variable fluid damper 110 provided symmetrically between the axle box 103 and the bogie frame 106 of the bogie 100 and installed in the vehicle body C. The variable fluid damper 110 is controlled to be turned on or off according to the straight or curved driving of the vehicle. The damping coefficient of the variable fluid damper 110 is increased so as to secure the stability for high-speed driving on a straight track by stopping the meandering motion, and the operation of the variable fluid damper 110 is stopped when the railroad vehicle curves. By lowering the attenuation coefficient of the variable fluid damper 110 to achieve the proper alignment of the axle 102 according to the radius of the curve to ensure the following performance on the curve orbit.

At this time, when the attenuation coefficient of the variable fluid damper 110 is lowered as described above, that is, when the magnetic field is not loaded by turning off the variable fluid damper 110, the magnetic particles in the solvent form a freely dispersed state. The damping action of the variable fluid damper 110 does not occur. On the contrary, when the attenuation coefficient of the variable fluid damper 110 is increased, that is, the variable fluid damper 110 is turned on. As a result, the dispersed magnetic particles are arranged in a direction parallel to the loaded magnetic field to have resistance to the meandering motion of the wheel 104.

In addition, the upper end of the bogie frame 106 is provided with a sensor 120 for detecting a straight running or curved driving state of the railway vehicle, in this case the sensor 120, that is, the driving state of the railway vehicle By detecting the driving state of the railroad car traveling on a straight or curved track and transmitting the detected signal to a damper control device, the variable fluid damper 110 is turned off through a damper control device when the railroad vehicle is curved. The control is made to be OFF, and on the contrary, when the railroad vehicle runs in a straight line, the variable fluid damper 110 is operated through a damper control device so that control of the wheel 104 can be suppressed.

On the other hand, Figure 5 is a flow chart showing a control process of the variable fluid damper according to the present invention, the control process of the variable fluid damper 110 according to the driving state of the railroad vehicle sensed by the sensor 120 will be described next Same as

The control process of the variable fluid damper 110, as shown in Figure 5, the step of detecting the driving state of the railway vehicle through a sensor 120 installed on the upper end of the bogie frame 106 (S200); Filtering the signal transmitted from the sensor 120 to a damper control device (S210); Determining a straight or curved driving state of the railway vehicle through the signal transmitted to the damper control device (S220); Supplying power to the variable fluid damper 110 when the railroad vehicle travels linearly by the determining step (S220); Magnetic particles in the solvent are arranged in parallel with the magnetic field by the magnetic field formed by the power supply to have a damping force for the four-way driving in a straight line (S250); to suppress the rolling motion of the railway vehicle through The magnetic particles in the solvent are arranged in parallel with the magnetic field by the magnetic field formed when the variable fluid damper 110 is supplied with power, and the wheel according to the linear driving with the attenuation coefficient increase of the variable fluid damper 110 is increased (S240). Slope motion of 104 is suppressed to achieve safety against high-speed driving on a straight track.

Hereinafter, a description will be given of the operation of the variable fluid damper installed on both sides of the truck according to the running state of the railroad vehicle of the railroad vehicle to which the present invention is applied.

6 and 7 show the operating state of the variable fluid damper according to the running state of the railway vehicle, Figure 6 shows the curve driving state of the railway vehicle by the variable fluid damper, Figure 7 is a railway by the variable fluid damper It shows the straight driving state of the vehicle.

First, as an operation process for driving the curve of a railway vehicle to which the present invention is applied, a railway vehicle in which a variable fluid damper 110 is installed between each wheel 104 and the bogie frame 106 of the bogie 100 runs on a curved track. As shown in FIG. 6, the railway vehicle has a centrifugal acceleration acting toward the outside from the inside of the traveling track, and detects the curved driving state of the railway vehicle at the upper end of the trolley frame 106. S120 senses and transmits a detection signal to a damper control device connected to the variable fluid damper 110.

When the detection signal of the curved driving state is transmitted from the detection sensor 120 to the damper control device as described above, the filtering of the noise signal except the main signal (S210) is performed primarily, and the filtering (S210) signal is detected. It is determined whether the railway vehicle is in a straight line or in a curved line in comparison with a predetermined centrifugal acceleration set value for detecting a curve in the damper control device (S220), and the railway vehicle is determined as described above (S220). If it is determined that the driving state of the curve, the power supply of the variable fluid damper 110 connected to the damper control device is cut off, as shown in Figure 4 (a), the MR fluid in the variable fluid damper 110, that is, the cylinder 111 Proper alignment of the axle 102 according to the radius of curvature is achieved by the variable fluid damper 110 which does not generate damping force, such as allowing magnetic particles in the non-conductive solvent to be freely dispersed. As air is to ensure the following ability of the curve on the track, it is possible to achieve a smooth curve passing through a follow-up performance of the curve on the track as described above.

Next, as an operation process for linear driving of the railway vehicle to which the present invention is applied, when the railway vehicle provided with the variable fluid damper 110 runs on a straight line, as shown in FIG. In the wheeled shaft 101 installed on both sides of the 106, the vehicle travels in a zigzag running state in a zigzag manner according to a change in the contact point of the wheel 104 forming the inclined surface from the flange and the rail surface. The sensing sensor 120 installed at the upper end of the balance frame 106 detects the driving state (S200) and transmits a detection signal to a damper control device connected to the variable fluid damper 110.

As described above, when the detection signal of the linear driving state is transmitted from the detection sensor 120 to the damper control device, the filtering of the noise signal except the main signal is performed (S210) and the filtering (S210) signal is primarily performed. It is determined whether or not the railway vehicle is traveling in a straight line or a curve in comparison with a predetermined centrifugal acceleration set value in the damper control device through (S220), and through the determination step (S220) as described above, the railway vehicle is in a linear driving state. When it is determined, power is supplied to the variable fluid damper 110 connected to the damper control apparatus (S230) and filled in the MR fluid, that is, the cylinder 111 in the variable fluid damper 110 as shown in FIG. In step S240, the attenuation coefficient of the variable fluid damper 110 is increased by the MR fluid as the magnetic particles in the non-conductive solvent are arranged in parallel with the magnetic field by the magnetic field formed by the power supply. To increase the damping force and the action of the four-wheel 104 according to the straight traveling suppressed (S250), it is possible to achieve this, the safety of the high-speed running on a straight trajectory through.

As described above, the above-described embodiment is described with reference to the most preferred example of the present invention, but is not limited to the above-described embodiment, and it is apparent to those skilled in the art that various modifications can be made without departing from the technical spirit of the present invention. will be.

The trolley traveling stabilizer of the present invention comprises a variable fluid damper, which is a traveling stabilizer filled with MR fluid, between the axle box and the frame of a railway vehicle bogie, so that the damping force of the variable fluid damper during linear track travel of a railway vehicle, namely, The damping force of the magnetic particles in the filled non-conductive solvent is arranged in parallel by the magnetic field formed by the power supply to suppress the meandering motion of the linear driving, thereby improving the stability of the high-speed traveling on the linear track. In addition, there is an excellent effect such that the running speed in a straight run is also increased.

In addition, through the variable fluid damper, it is possible to achieve smooth curve driving by securing a curve following performance on a curved track as in the conventional self steering vehicle.

Furthermore, when the variable fluid damper is applied to a general bogie, the critical speed of the bogie can be improved through the variable fluid damper, and in particular, the curve steering performance and the linear running stability of the general bogie can be achieved through the variable fluid damper. Since it is possible to overcome the double rate characteristic, there is an effect that the variable fluid damper can be effectively used not only for urban railway vehicles traveling on a track in which straight lines and sharp curves are mixed, but also for tilting vehicles.

Claims (6)

In the trolley | bogie for railroad cars provided with the wheel shaft on the front and back sides of the trolley frame; A variable fluid damper which is installed symmetrically on both sides of the bogie between the axle box and the bogie frame and generates a damping force by supplying power, thereby suppressing four-way driving in a straight line; A damper control device for controlling the variable fluid damper to be turned on or off according to a straight or curved driving of the railway vehicle; It is installed on the upper end of the bogie frame to detect the driving state of the straight or curved of the railway vehicle to detect a signal to transmit a signal to the damper control device to operate the variable fluid damper when driving straight; The variable fluid damper is an MR fluid damper having a structure in which magnetic particles in a solvent are arranged in parallel with the magnetic field by a magnetic field formed by a power supply. delete delete delete In the vehicle traveling stabilization method using a balance traveling stabilizer consisting of an MR fluid damper, a damper control device, and a sensor, Detecting a driving state of a railway vehicle through a detection sensor installed at an upper end of the bogie frame; Filtering a signal transmitted from the detection sensor to a damper control device; Determining a straight or curved driving state of a railway vehicle through a signal transmitted to the damper control device; Supplying power to the MR fluid damper during linear driving of the railway vehicle by the determining step; Increasing the attenuation coefficient while the magnetic particles in the solvent are arranged in parallel with the magnetic field by the magnetic field formed by the power supply; The step of increasing the damping coefficient to have a damping force for the four-way driving of the railway vehicle when running straight; including the restraining movement of the rolling stock, including the vehicle running stability method using a liquid. delete

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