JPH07186920A - Anti-skid device for rolling stock - Google Patents

Abstract

PURPOSE:To provide a rolling stock such as a freight-train car having no power source with such an equipment as an electrical type anti-skid device. CONSTITUTION:An anti-skid device for rolling stock is equipped with an actuator 5 interposed between a brake pressure source and a brake cylinder 7, a tachometer generator 9 for detecting the wheel speed as well as generating power by wheel rotation, a a storage battery 20 for accumulating electric power generated by the tachometer generator 9, and a control unit 30 for inputting signals from the tachometer generator 9 and outputting instruction signals to the actuator 5. The control unit 30 controls the actuator 5 so as to reduce, hold or pressurise brake pressure inside the brake cylinder 7 in accordance with the possibility of wheel skid and at least either the actuator 5 or the control unit 30 is the anti-skid device for rolling stock actuated by the electric power from the storage battery 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake control device used in a railway vehicle, and more particularly to a device capable of preventing wheel slippage.

[0002]

2. Description of the Related Art Conventionally, as a slip prevention device for a railroad vehicle, as shown in FIG. 4, an actuator 50 interposed between a brake pressure source (not shown) and a brake cylinder 70, and wheel speeds. Some include a speed sensor 80 for detecting the speed and a controller 90 for inputting a signal from the speed sensor 80 and outputting an instruction signal to the actuator 50.

The control unit 90 monitors the rotational speed of each wheel, and if there is a possibility of slipping on the wheel, the control unit 90 reduces the brake pressure in the brake cylinder 70.
The actuator 50 is controlled to hold and pressurize,
Prevent the wheels from sliding.

[0004]

When a railroad vehicle is composed of a locomotive and a freight car, electricity used in the freight car is taken from the locomotive. Therefore, in the conventional anti-skid device for railway vehicles, since the power source used for the anti-skid device for each freight car is taken from the locomotive, for example, when 20 freight cars are connected, current consumption per car Assuming that the current consumption is 3 A, the total current consumption becomes 60 A, and the pull-through wire from the locomotive cannot be endured. For this reason, it becomes difficult to attach an anti-skid device that electrically controls to each freight car, and it is not possible to perform a precise anti-skid device.

The present invention has been made in view of the above-mentioned matters, and an object of the present invention is to provide a railway vehicle anti-slip device having an electric anti-slip device on a railway vehicle such as a freight vehicle having no power source.

[0006]

According to the present invention, there is provided an actuator 5 interposed between a brake pressure source and a brake cylinder 7, and a speed generator 9 for generating electric power by rotating the wheel and detecting the speed of the wheel. The control unit 30 includes a storage battery 20 that stores electric power generated by the speed generator 9, and a control unit 30 that inputs a signal from the speed generator 9 and outputs an instruction signal to the actuator 5. Controls the actuator 5 so that the brake pressure in the brake cylinder 7 is reduced / maintained / pressurized in accordance with the possibility of wheel slipping, and at least one of the actuator 5 and the control unit 30 is the storage battery. 20
It is a skid prevention device for railway vehicles that is operated by electric power from.

It is desirable to provide a charger 10 for inputting the electric power generated by the speed generator 9 and outputting a charging current adjusted to an appropriate voltage to the storage battery 20. In addition, the voltage detector 15 that detects the voltage of the storage battery 20
The charger 10 can be configured to charge the storage battery 20 only when the voltage detector 15 detects a voltage lower than a preset reference voltage.

Further, the charger 10 may be configured to selectively input at least one of the currents from the vehicle body power supply 2 and the speed generator 9.

[0009]

In normal traveling, the storage battery 20 is charged with the electric power generated by the speed generator 9 as the wheels rotate. When the vehicle is provided with a power supply line, when the charging current to the storage battery 20 is insufficient with only the power from the speed generator 9 during the charging, the storage battery 20 is also supplied from the vehicle body power supply 2.
Supply power to.

When the control unit 30 determines the possibility of wheel slipping based on the wheel speed information from the speed generator 9,
Electric power from the storage battery 20 activates each device for slip prevention to prevent wheels from slipping.

[0011]

EXAMPLES Examples of the present invention will be described below. <Example 1> Example 1 will be described with reference to Figs.

As shown in FIG. 1, the anti-skid device for a railway vehicle of this embodiment has an actuator 5 interposed between a brake pressure source (not shown) and a brake cylinder 7.
A speed generator 9 for generating electric power by rotating the wheels and detecting the speed of the wheels; and a controller 30 for inputting a signal from the speed generator 9 and outputting an instruction signal to the actuator 5. .

As shown in the schematic diagram of FIG. 2, the speed generator 9 has a rotor 41 made of a magnetic material having irregularities formed on its outer periphery.
Is attached to the axle, and the tip of the yoke 44 connected to the permanent magnet 43 is close to the unevenness of the rotor 41. A solenoid coil 45 is wound around the yoke 44. When the rotor 41 rotates as the wheels rotate, the magnitude of the magnetic flux passing through the solenoid coil 45 changes, and an AC voltage is generated across the solenoid coil 45. Further, the rotation speed of the wheel is detected by detecting the frequency of the AC voltage.

The brake pressure source (air tank) sends compressed air toward the brake cylinder 7. Further, the actuator 5 is provided with a hold valve (not shown) that is an open / close controlled solenoid valve and a decay valve (not shown).

The brake cylinder 7 is formed to brake the wheels by using the pressure of air supplied from the air tank via the actuator 5 as a brake pressure. The control unit 30 monitors the rotation speed of each wheel, and when the possibility of slipping occurs on the wheels, the actuator 5 is configured to reduce, maintain, and pressurize the brake pressure in the brake cylinder 7. To prevent the wheels from sliding.

A rectifier 12 for converting the AC voltage generated by the speed generator 9 into a DC voltage is provided between the speed generator 9 and the charger 10. Then, the charger 10 adjusts the input power to an appropriate voltage, and supplies the charging current to the storage battery 20. The charging of the storage battery 20 from the charger 10 is always performed with a small current.

In this embodiment, a voltage detector 15 for detecting the voltage of the storage battery 20 is provided between the charger 10 and the storage battery 20. The operation of this embodiment will be described.

During normal traveling, the AC voltage generated by the speed generator 9 is converted into a DC voltage by the rectifier 12,
It is sent to the charger 10. In the charger 10, the DC voltage is adjusted to an appropriate voltage, the charging current is supplied to the storage battery 20,
The storage battery 20 is charged. When charging the storage battery 20, the voltage detector 15 that detects the voltage of the storage battery 20
When a voltage higher than a preset voltage is detected, charging of the storage battery 20 is stopped in order to prevent overcharge. That is, charging is performed only when the voltage of the storage battery 20 is lower than the set voltage value.

Next, when the control unit 30 determines the possibility of the wheels to slide based on the speed information from the speed generator 9 when the brakes are braked during traveling, the control unit 30 determines whether the wheels are likely to slide. An instruction signal is output to the actuator 5 that communicates with the brake cylinder 7. That is, the actuator 5 closes the hold valve to close the brake cylinder 7.
The pressure supply to the brake cylinder 7 is stopped and the decay valve is opened to reduce the brake pressure in the brake cylinder 7.
Then, when the brake pressure is reduced to an appropriate level, both the hold valve and the decay valve are closed to maintain the brake pressure. Further, when there is no possibility that the wheels will slide, the hold valve is opened while the decay valve remains closed, and the brake cylinder 7 is repressurized.

During such a wheel slip prevention control, the electric power for operating each device is covered by the electric power from the storage battery 20. Then, when the power of the storage battery 20 is consumed by the slip prevention control or self-discharges and the voltage of the storage battery 20 drops, the power from the speed generator 9 charges the storage battery 20 again to a constant voltage.

As described above, according to the present embodiment, by providing the speed generator 9 and the storage battery 20, it is possible to attach the electric slip prevention device to a railway freight car not equipped with a power source.

Further, since the generator is integrated with the speed sensor, it is possible to suppress an increase in the number of parts,
The size and cost of the device can be reduced. <Second Embodiment> A second embodiment will be described with reference to FIG. The present embodiment is suitable when the vehicle has a power supply lead wire. The same parts as those described in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, as shown in FIG. 3, a switch 17 is provided between the speed generator 9 and the charger 10. The switching device 17 includes the speed generator 9 and
It is connected to both the body power supply 2 of the locomotive. And
By operating the switching device 17, at least one of the electric power from the speed generator 9 and the vehicle body power supply 2 is selectively charged.
It is possible to supply power to 0.

That is, when the electric power generated by the speed generator 9 becomes a low voltage below the level at which the storage battery 20 can be charged, the switching unit 17 supplies the electric power from the vehicle body power supply 2 to the charger 10. , Make sure the voltage is rechargeable.
At this time, since a small charging current is sufficient, overload does not occur on the locomotive side, and it is not necessary to thicken the lead wire of the vehicle.

[0025]

According to the present invention, it is possible to provide a railway vehicle anti-skid device having an electric anti-skid device for a railway vehicle having no power supply.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a speed generator of Example 1.

FIG. 3 is an overall configuration diagram showing a second embodiment of the present invention.

FIG. 4 is an overall configuration diagram showing a conventional example

[Explanation of symbols]

 2 ... Body power supply 5 Actuator 7 Brake cylinder 9 Speed generator 10 Charger 12 Rectifier 15 Voltage detector 17 Switch 20 Storage battery 30 Control unit ( Controller) 41..Rotor 43..Permanent magnet 44..Yoke 45..Solenoid coil

Claims (4)

[Claims] 1. An actuator interposed between a brake pressure source and a brake cylinder, a speed generator for generating power by rotation of a wheel and detecting the speed of the wheel, and an electric power generated by the speed generator. A storage battery that stores electricity, and a control unit that inputs a signal from the speed generator and outputs an instruction signal to the actuator, and the control unit is configured to apply a brake pressure in the brake cylinder in accordance with a possibility of sliding of wheels. The above-mentioned actuator is controlled to perform decompression / holding / pressurization, and at least one of the actuator and the control unit is operated by electric power from the storage battery. 2. The railway vehicle according to claim 1, further comprising a charger that inputs electric power generated by the speed generator and outputs a charging current adjusted to an appropriate voltage to the storage battery. Anti-skid device. 3. A voltage detector for detecting the voltage of the storage battery is provided, and the storage battery is charged by the charger only when the voltage detector detects a voltage lower than a preset reference voltage. The anti-skid device for a railway vehicle according to claim 2. 4. The anti-skid device for railway vehicles according to claim 2, wherein the charger selectively inputs at least one of currents from a vehicle body power source and the speed generator.