JP2009186363A - Truck travel test device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the time when a truck wheel for railroad cannot follow the speed of a rail wheel, slips on the rail wheel, and becomes into a fixed state, and to prevent the abrasion of the truck wheel for the railroad and the rail wheel. <P>SOLUTION: This truck travel test device includes a fixation determining means 14 for calculating by operation the rotation speed of the truck wheel 5a for railroad in the truck 5 for the railroad, and determining based on the rotation speed of the truck wheel 5a for the railroad whether the rotation of the truck wheel 5a for the railroad is in the fixed state where the rotation is disabled from the control by the rotation of the rail wheel 2, and a deceleration measuring means 11 for calculating the deceleration by calculating the rotation speed of the rail wheel 2. During a travel test of controlling the speed of the rail wheel 2 along a speed pattern for test, it is detected whether the truck wheel 5a for the railroad is in the fixed state while the deceleration of the rail wheel 2 is monitored. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a truck running test apparatus for a railway carriage on which a railway vehicle main body is placed, and more particularly to a carriage running test apparatus that prevents wear of wheels of a carriage that occur during a truck running test.

  At the present time when the speed of railway vehicles and the congestion of diamonds are remarkable, improving the performance of railway vehicles and safety of operation are the most important issues. Along with this, it is necessary to respond to high speeds and confirm safety etc. in railway carts. As one means for elucidating and improving these problems, a truck running test apparatus capable of reproducing rail running of a railway vehicle is used.

  In the future, the bogie running test device is expected to play an important role in understanding the behavior of railway bogies during high-speed running.

  For example, since the bogie running test apparatus described in Patent Document 1 corresponds to speeding up on a small radius of curvature track and speeding up on a large radius of curvature track, a trajectory having an arbitrary curvature is generated in a simulated manner. It is composed of a rail wheel that imitates a rail of a vehicle and a carriage that travels on the rail wheel.

  Patent Document 2 also proposes a vehicle running test apparatus that mounts not only a railway carriage but also a railway vehicle and performs a running test of the entire vehicle with high accuracy.

JP 2002-356165 A Japanese Patent No. 0428208

However, in the above prior art, when the running test is performed by controlling the rail wheel speed along the test speed pattern with the bogie running test device, it does not cause a sudden deceleration during deceleration, that is, excessive deceleration occurs. However, if the speed pattern is not appropriate, or if the rail wheel is decelerated from a higher speed than before, or if the rail wheel is suddenly decelerated due to some failure, etc. The wheel cannot follow the speed of the rail wheel and starts to slide, falls out of control from the rotation of the rail wheel, and enters a sliding state due to sticking. Once in the fixed state, the rail car wheel is scraped on the rail wheel, the rail car wheel tread is flat (weared), and the rail wheel tread is also worn and scratched. In that case, it is necessary to grind the worn portions of the railway bogie wheel and the rail wheel as well as the running test of the railway bogie. For this purpose, it is necessary to remove the railway wheel from the railway carriage and the rail wheel from the device, which takes time and cost.
In view of the above problems, the present invention detects when the railway bogie wheel cannot follow the speed of the rail wheel, slides on the rail wheel, and reaches a fixed state, and wears the rail car wheel and the rail wheel. Provided is a truck running test device for preventing.

  According to the present invention, in order to achieve the above-described object, first, a rail wheel simulating a rail on which a railway vehicle travels is provided, and the rail of the railway bogie in the railway vehicle is moved along the test speed pattern along the rail. In a truck running test apparatus that controls the speed of the carriage while running on a wheel and performs a running test, the number of rotations of the wheel of the railway carriage is calculated by calculation, and the rotation of the wheel is the rotation of the rail wheel. A sticking determination means for judging whether or not the sticking state falls under control due to the control based on the rotational speed of the wheel, and a deceleration measuring means for calculating the deceleration by calculating the rotational speed of the rail wheel, and the test During a running test that controls the speed of the rail wheel along the speed pattern, a truck running test device that detects whether or not the wheel of the railway carriage is in a fixed state while monitoring the deceleration of the rail wheel Is provided.

  Moreover, in this invention, when the time of the wheel of the said railway trolley | bogie being in the adhering state is detected, the trolley | bogie running test apparatus which makes the said rail wheel free run is provided.

  Further, in the present invention, the sticking determination means determines that the sticking state is in a sticking state when the rail wheel is in a decelerating state and there is no change in the number of rotations of the wheel of the railway bogie at an arbitrary time interval. A test device is provided.

  ADVANTAGE OF THE INVENTION According to this invention, in the trolley | bogie driving | running | working test apparatus which performs the driving | running | working test of a railway trolley | bogie, abrasion of the railway trolley | bogie wheel and a rail wheel can be prevented.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing a cart traveling test apparatus according to an embodiment of the present invention. In FIG. 1, the bogie running test apparatus 1 can be equipped with one bogie 5 for railroads and has rails 2 imitating rails of the railcars for each axis of the bogie wheels (5a). The rail ring 2 is disposed on the rail ring base 3. The railway carriage 5 mounts the main body of the railway vehicle, and two railway carriages 5 are used per vehicle. Furthermore, the railway bogie 5 has two axes of bogie wheels (5a) for the railway. The railway bogie wheel 5a of the railway bogie 5 is installed on the rail wheel 2. Further, the railway carriage 5 is fixed to the apparatus building 6 by the fixing device 4, and a state in which a load equivalent to that of the railway vehicle is applied is realized. The rail wheel 2 is provided with a rail motor 7 for rotational driving. Due to the rotation of the rail wheel 2 by the rotational drive of the rail wheel motor 7, the rail car wheel 5 a of the rail car 5 is rotated in the direction opposite to the rotating direction of the rail wheel 2.

  A rotation command to the railway wheel motor 7 is output to the railway wheel motor controller 9 from a central processing unit 8 (hereinafter, abbreviated as “CPU”) although it is represented by a solid arrow in FIG. The rotation command is issued based on a speed pattern created for each railway carriage 5 to be tested. The speed pattern that is the basis of this rotation command is stored in a memory or an external storage medium (not shown), and an arbitrary speed pattern can be selected according to the conditions of the test to be performed. Specifically, the rail wheel motor controller 9 controls the rotation speed of the rail wheel motor 7 in accordance with the speed command output from the CPU 8. Moreover, the rotation direction of the rail wheel motor 7 may be one direction or may be reversely rotatable.

  FIG. 2 is a diagram showing a speed pattern used in the bogie running test apparatus. FIG. 2 shows a time-based pattern in which the horizontal axis is time (s) and the vertical axis is speed (km / h). In FIG. 2, the time axis (s) includes an acceleration region, a constant speed region, and a deceleration region. The acceleration region is a region where the acceleration is increased at a constant rate from the state where the speed is zero, and the constant speed region is a region where the acceleration is made zero and the maximum speed is maintained after the acceleration is increased. The deceleration area is an area from the state where the maximum speed is maintained until the speed is reduced at a constant rate and the speed becomes zero.

  The rotation speed of the railway wheel 2 driven to rotate by the railway wheel motor 7 is based on the pulse generated by inputting the pulse generated by the pulse generator 10 that generates the pulse wheel 2 by converting the rotation of the railway wheel 2 into a pulse. Is obtained by calculation. Further, the rotational speed calculated by the CPU 8 is sent to the deceleration measuring means 11. And the deceleration measuring means 11 calculates | requires deceleration by calculation based on the rotation speed of the rail wheel 2 for the predetermined time.

  On the other hand, the rotation speed of the railway bogie wheel 5a is detected by a bogie speed generator 12 that converts the rotation speed of the wheel into electric power. The cart speed generator 12 combines, for example, a salient pole rotor made of a permanent magnet and a stator having an electric winding, and generates a voltage proportional to the rotation speed given to the rotor from the stator side. It is a generator to detect. The output voltage of the bogie speed generator 12 is sent to the rotation speed calculation means 13, and the rotation speed of the railway bogie wheel 5a is obtained by calculation. The rotational speed calculation means 13 obtains the rotational speed of the railway bogie wheel 5a by calculation when the output voltage of the bogie speed generator 12 is proportional to the rotational speed of the railway bogie wheel 5a.

  The obtained wheel rotation speed is sent to the sticking determination means 14 to determine whether or not the railway bogie wheel 5a is in the sticking state.

  An example of a running test in the cart running test apparatus 1 using the speed pattern shown in FIG. 2 will be described. FIG. 2 shows a time-based pattern in which the horizontal axis is time (s) and the vertical axis is speed (km / h). The horizontal axis is distance (km) and the vertical axis is speed (km / h). The speed pattern of The test procedure is as follows.

  First, in the acceleration region shown in FIG. 2, as described above, the speed command is output from the CPU 8 to the rail wheel motor controller 9 in FIG. Thereby, the rotation speed of the rail wheel motor 7 is controlled, and the rail wheel 2 is accelerated to the maximum speed shown in the speed pattern. Since the railway bogie wheel 5a of the railway bogie 5 is rotated by the rail wheel 2, it is similarly accelerated to the maximum speed shown in the speed pattern.

  Next, similarly, in the constant speed region, a command is sent to the railway wheel motor controller 9 so that the rotational speed of the railway wheel motor 7 becomes constant, and as a result, the rotational speed of the railway wheel 2 becomes constant speed. Thus, the railway bogie wheel 5a is also at a constant speed.

  Next, in the deceleration region, a command is sent from the CPU 8 to the rail wheel motor controller 9 so that the rail wheel 2 similarly decelerates along the speed pattern, and the speed reduction of the rail wheel 2 is started. The railway bogie wheel 5a follows the rail wheel 2 and decelerates similarly. The speed of the rail wheel 2 becomes zero and the test ends. During the test, vibrations of the railway carriage 5 during traveling are measured using a sensor (not shown).

  In the above test, sufficient consideration should be given so that sudden deceleration does not occur, that is, excessive deceleration does not occur during deceleration, but the speed pattern is not appropriate for the railway carriage 5 to be tested. If the rail wheel 2 is decelerated from a higher speed than before or suddenly decelerates due to some failure or the like, the rail car wheel 5a cannot follow the speed of the rail wheel 2 and starts to slide. As a result, a sliding state due to sticking in the current vehicle, that is, a sticking state is obtained.

  Here, the fixed state refers to a case where the rotation speed of the railway bogie wheel 5a at a predetermined time interval does not change even though the rail wheel is decelerated. The predetermined time interval is, for example, 2 to 3 seconds. In this fixed state, the railway bogie wheel 5a is worn by the contact surface being scraped by the rail wheel 2 being decelerated.

  Next, in the bogie running test apparatus 1 of the present invention, the operation of detecting the moment when the railway bogie wheel 5a reaches the fixed state and preventing the wear of the railway bogie wheel 5a and the rail wheel 2 will be described in more detail with reference to FIG. explain.

  FIG. 3 is a flowchart for explaining the wear prevention operation. First, based on the speed pattern shown in FIG. 2, the CPU 8 outputs a speed command to the rail wheel motor controller 9. The rail wheel motor controller 9 controls the rotation speed of the rail wheel motor 7 according to the speed command output from the CPU 8 and increases the speed to the maximum speed with a constant acceleration. Next, the rail wheel motor controller 9 stops the acceleration of the rail wheel motor 7 and rotates the rail wheel 2 at a constant maximum speed.

  Next, the rail 2 is decelerated (3-1) like the speed pattern shown in FIG. Next, the deceleration of the rail wheel 2 during deceleration is calculated (3-2). In calculating the deceleration, the CPU 8 calculates the rotational speed of the rail wheel 2 and then inputs the rotational speed to the deceleration measuring means 11. The deceleration measuring means 11 calculates the deceleration by converting the input rotational speed into a speed and measuring the change in speed for a predetermined time. By inputting this deceleration to the CPU 8, the CPU 8 confirms that it is actually decelerating and outputs a speed command to the rail wheel motor controller 9 so that the speed of the rail wheel 2 is reduced to zero. To do.

  Next, the rotation speed of the railway bogie wheel 5a is calculated. As described above, the rotational speed of the railway bogie wheel 5a is obtained by sending the output voltage of the bogie speed generator 12 that converts the rotational speed of the wheel into electric power to the rotational speed calculating means 13, thereby rotating the railway bogie wheel 5a. A number is obtained by calculation (3-3).

  Next, the sticking determination means 14 determines whether or not the rail car wheel 5a is in a sticking state from the wheel rotation speed of the rail car wheel 5a. Although the rail wheel 2 is in a decelerating state, it is determined that the railway bogie wheel 5a is in a fixed state when there is no change in the number of rotations at an arbitrary time interval (the number of rotations has not decreased). When the fixed state has not occurred, the test is continued (3-8).

  When it is in the fixed state, the fixing determination means 14 notifies the CPU 8 that the railway bogie wheel 5a is in the fixed state (3-5). The CPU 8 receives the notification of the fixed state of the railway bogie wheel 5a from the fixed determination means 14, and issues a free run instruction to the rail wheel motor controller 9 (3-6). Free run is a state in which the speed control from the rail-wheel motor controller 9 to the rail-wheel motor 7 is released, and the rail-wheel 2 rotates freely only by inertia without being transmitted with the driving force from the rail-wheel motor 7. Say.

  As described above, the rail wheel 2 is free-runned, so that, for example, the rail wheel 2 is released from rapid deceleration due to an inappropriate speed pattern, and no forcing force is applied to the railway bogie wheel 5a.

  The free-run command by the CPU 8 is indicated by a one-dot chain arrow in FIG. The rail wheel motor 7 is free-run by the rail wheel motor controller 9 that has received the free-run instruction, so the rail wheel 2 is also free-run. And again, the sticking determination means 14 determines whether the railway bogie wheel 5a is in the sticking state based on the rotational speed of the railway bogie wheel 5a. Here, the reason why it is determined again whether or not it is in the fixed state is that, depending on the deceleration, the railway bogie wheel 5a is not always immediately released from the fixed state even in the free-run state. is there. Therefore, if it is still in the fixed state, monitoring by the fixing determination means is continued until the fixed state is released (3-7). Next, when the rotational speed of the railway bogie wheel 5a is changed at an arbitrary time interval (when the rotational speed is lowered), that is, when the fixed state is released, the railway bogie 5 based on the speed pattern is further changed. The running test continues.

It is a figure which shows the trolley | bogie running test apparatus which becomes one Embodiment of this invention. It is a figure which shows an example of the speed pattern used with said trolley | bogie running test apparatus. It is a flowchart explaining the operation | movement of wear prevention in said trolley | bogie running test apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Carriage running test apparatus, 2 ... Rail wheel, 3 ... Rail wheel base, 4 ... Fixing device, 5 ... Railway car, 5a ... Railway car wheel, 6 ... Equipment building, 7 ... Rail motor, 8 ... CPU , 9 ... Controller for rail wheel motor, 10 ... Pulse generator, 11 ... Deceleration measuring means, 12 ... Dolly speed generator, 13 ... Rotational speed calculating means, 14 ... Adherence determining means.

Claims (3)

A rail wheel imitating the rail on which the rail vehicle travels, and controlling the speed of the rail car while traveling the rail wheel on the rail wheel along the test speed pattern in the rail car; In the bogie running test device for running test,
A sticking determination means for calculating the rotation speed of the wheel of the railway bogie by calculation, and determining from the rotation speed of the wheel whether or not the rotation of the wheel is in a sticking state that is impossible to control by the rotation of the rail wheel; And a deceleration measuring means for calculating a deceleration by calculating the rotation speed of the rail wheel,
During a running test in which the speed of the rail wheel is controlled along the test speed pattern, it is detected whether or not the wheel of the rail car is in a fixed state while monitoring the deceleration of the rail wheel. A bogie running test device. In the bogie running test device according to claim 1,
The bogie running test apparatus characterized in that when the wheel of the railway bogie is detected to be in a fixed state, the rail wheel is free-run. In the bogie running test device according to claim 1 or 2,
The cart determination test means that when the rail wheel is in a decelerating state, it is determined that there is no change in the number of rotations of the wheels of the railway cart at an arbitrary time interval. apparatus.

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