JPH03200470A - Method of preventing body from colliding with stopper at transition curve - Google Patents

Abstract

PURPOSE:To prevent a body from colliding with a lowering preventing stopper by detecting the torsion of the body on both sides of a front and a rear trucks at the time of a rolling stock stopping at a transition curve, and in case of exceeding the allowed angle of torsion, by correcting the target value of air spring height in the higher direction. CONSTITUTION:Air springs 1, 2 and 3, 4 are provided on both bilateral sides of the front truck 11 and rear truck 12 of a rolling stock. Auxiliary air chambers connected to the lower parts of the air springs 1, 2 and 3, 4 are fitted at truck frames, and outer cylinders on the upper faces of the air springs 1, 2 and 3, 4 are brought into contact with the bottom part of a body. Air feed pipes 8 provided piercing the outer cylinders are connected to a main air reservoir 6 through solenoid air feed valves 5. In this case, height sensors 9 formad of links and signal transmitters are provided between the bottom face of the body and the truck frames, and the detection signal of each height sensor 9 is inputted into a controller 10. The angle-of-torsion of the body is then obtained from the height information of the air springs to be compared with the allowed angle of torsion, and in the case of exceeding the allowed angle of torsion, the target height value is heightened according to the angle of torsion to control air supply/discharge to/from the air springs.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of controlling an air spring to prevent a car body from hitting a lowering stopper when a railway vehicle having a bogie with an air spring is on a transition curve.

Conventional technology Railway vehicles with bogie bogies equipped with air springs often adopt a four-point support system in which four air springs are arranged in one vehicle, and the air springs are configured to automatically adjust the height of each individual air spring. There is. In other words, it is equipped with an automatic height adjustment valve that combines a link and a leveling valve to automatically adjust the amount of compressed air in the air spring in response to the load at the time and keep the height of the vehicle constant.

Also, when there is a significant difference in the internal pressure of the left and right air springs,
In order to keep the internal pressure of the left and right air springs equal, a differential pressure regulating valve is installed between the auxiliary air chambers of the left and right air springs.

When the railway vehicle is on a flat route and the front and rear bogies are on the same plane, the internal pressure of each air spring is automatically adjusted by the action of the automatic height adjustment valve, and the height of the vehicle body is kept constant. While the height is kept constant, the supply and exhaust of the automatic height adjustment valve is stopped.

As shown in Fig. 4, when the 5-pass vehicle enters the transition curve, that is, the cant decreasing section, the height of the four air springs (1) (2) (3) (4) of the vehicle body (13) is determined geometrically from the relationship between the bogie and the car body, so the air springs (1) (2) of the front bogie (11)
The air spring (1) on the outer track side is compressed, and the air spring (2) on the inner soft side is expanded. In addition, the air spring (
3) In (4), the air spring on the inner soft side (4) is compressed, and the air spring on the outer track side (3>) is expanded.The heights of the air springs are both out of the control target value. Therefore, the automatic height adjustment valve is continuously supplied and exhausted.

Therefore, the compressing air springs (1) and (4) inevitably come into contact with the stopper.

Problems to be Solved by the Invention As mentioned above, when a railway vehicle is on a transition curve and the car body hits the stopper, the load at that part is supported by the contact area and is not transmitted to the compressed air of the air spring. . Therefore, even if the internal pressure of the air spring is measured, it is not possible to accurately detect the load that the air spring receives. As a result, it is not possible to perform air supply/exhaust control to eliminate the internal pressure difference between the air springs located diagonally between the front and rear bogies. Further, as a result of hitting the stopper, no spring force acts between the car body and the bogie, so an excessive torsional force is generated in the car body.

This invention eliminates the above-mentioned drawbacks, prevents the vehicle body from hitting the stopper on a transition curve, and prevents deterioration of passenger ride comfort, shortening of air spring life, and wheel load fluctuation due to excessive twisting of the vehicle body. A method of controlling an air spring is provided.

Means for Solving the Problems In order to avoid the above object, the present invention provides a method for preventing contact with a stopper in a transition curve by using a spring with an air spring.

In a system that measures the height of each air spring of a railway vehicle with a gee bogie to perform air supply and exhaust control, the amount of torsion of the car body on the transition curve is calculated as the torsion angle of the car body from the air spring height detected by the height sensor. If the torsion angle is found to be larger than a preset allowable torsion angle, the target value of the height between the vehicle body and the bogie is set to be large according to the torsion angle, and the air springs are supplied and exhausted.

The torsion angle between the car body and the bogie is detected, and if the torsion angle exceeds a preset allowable torsion angle, the target height between the car body and the bogie is set according to the torsion angle. Since the air spring is supplied and discharged by setting a large value, it is possible to prevent the vehicle body from hitting the stopper on the transition curve.

EXAMPLES Hereinafter, the present invention will be described in detail based on examples shown in the drawings.

FIG. 1 shows the main parts of an air spring device for carrying out the present invention. Front truck (11) and rear truck (12)
The air springs (1), (2) and (3) and (4) installed on both the left and right sides of the center of the is in contact with.

Then, an air supply pipe (8) provided through the outer cylinder is connected to the source air reservoir (6) via an electromagnetic air supply valve (5).

Similarly, an electromagnetic exhaust valve (7) and a pressure sensor (14) are provided by penetrating the outer cylinder. Furthermore, a height sensor (9) consisting of a link and a signal transmitter is installed between the bottom of the vehicle body and the bogie frame.

A controller (10) is installed at the center of the bottom of the vehicle body between the front and rear bogies, inputs detection signals from each height sensor (9), and also controls each electromagnetic air supply valve (5) and each electromagnetic exhaust valve (7).
The torsion angle of the vehicle body is determined from the air spring height information and compared with a preset allowable torsion angle. If the torsion angle is larger than the allowable torsion angle, the The target height between the vehicle body and the bogie is set to a large value according to the torsion angle, and the air springs are supplied and exhausted.

Note that the pressure sensor (14) is used to measure the internal pressure of the air spring and control the internal pressure.

Now, as shown in Figure 2 a and b, the height of the air springs (1) and (2) of the front truck (11) is h, and the height of the rear truck (1
Let the heights of the air springs (3) and (4) in 2) be , h4, and the width of the vehicle body be L, and the target height HO and allowable torsion angle θ0 of the air springs are manually entered in the controller (10).

When the railway vehicle is in the cant decreasing section, the detection signals of the air spring heights, h, h3, h4 determined by the height sensor (9) provided on each air spring are input to the controller (10). Here, the torsion angle θ^ on the front bogie side and the torsion angle θB on the rear bogie side are determined by the following equations.

Further, the allowable twist angle θ0 is given by the following equation.

However, δ: Stopper interval α: Margin until the stopper is reached Based on the torsion angle θ^, θB calculated by the controller (10) (2) Spring height control is shown in Figures 3a and b. It is done in a flowchart.

That is, the control is performed by reading the spring heights h+, h- of the front bogie (11) according to the procedure shown in Fig. 3a, and the control is performed by reading the spring heights h, h, of the rear bogie (12). Control is performed according to the procedure shown in FIG. In either case,
When the torsion angle θ^ or θB is larger than the allowable torsion angle θ0, H^=Ho +a (θ^-θ0) HB=Ho +a (θB-00) However, H^: Front bogie body and bogie Target value for the height between the rear bogie and the bogie HB: Target value for the height between the rear bogie body and the bogie a: As a proportionality constant, the target height is corrected to increase the air spring supply and exhaust. It will be done.

Then, by the automatic operation described above, when the average height of the left and right air springs reaches the target value H^ or HB, the air supply and exhaustion of the air springs is stopped.

Effects of the invention When a railway vehicle is stopped on a transition curve, the torsion of the car body is detected on each side of the front and rear bogies, and if the torsion angle is larger than the allowable torsion angle, the target value of the air spring height is increased. Since the air spring is supplied and discharged based on the corrected target value, the vehicle body does not hit the lowering stopper. As a result, deterioration of passenger comfort, shortening of air spring life, and wheel load fluctuations due to excessive twisting of the vehicle body are prevented.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the main parts of an air spring control device for carrying out the present invention, and Fig. 2 shows the height and torsion angle of the left and right air springs due to the inclination of the car body when the railway vehicle is in a cant decreasing section. FIG. 3 is a flowchart of the front bogie (a) and rear bogie (b) of air spring control according to the present invention, and FIG. 4 is an explanatory diagram showing the front bogie, and FIG. FIG. 2 is an explanatory diagram showing the track twist and the state of the air springs of the front and rear bogies when the railway vehicle is in a cant decreasing section. 1.2.3.4... Air spring 5... Solenoid air supply valve 6... Original air reservoir 7...
Electromagnetic exhaust valve 8...Air supply pipe 9...Height sensor 10...Controller 11...Front truck 1
2... Rear bogie body Front bogie torsion angle... Rear bogie torsion angle... Front bogie height target value... Rear bogie height target value

Claims (1)

[Claims] 1. In a system that measures the height of each air spring of a railway vehicle with a bogie equipped with an air spring and performs air supply/exhaust control, the amount of torsion of the car body on a transition curve is calculated from the air spring height detected by a height sensor. Find it as the torsion angle of
When the torsion angle is larger than the pre-set allowable torsion angle, the target height between the car body and the bogie is set larger according to the torsion angle, and the stopper is installed at the transition curve of the car body to supply and exhaust air springs. How to prevent hits.