JPH0321382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotation restraint device for a bogie bogie of a railway vehicle, in which one or more rotation restraints connect the bogie bogie to a vehicle frame mounted thereon.

As is known in the field of railway vehicles, bogies with wheel sets that are relatively firmly guided on both sides of the bogie and have precisely aligned treads are used, especially at high speeds, even in normally good running conditions. During operation, there is a tendency for the bogie to become unstable, during which the bogie makes rapid and violent rotational movements (yawing movements) about its vertical axis under the vehicle frame on which it rests. Above a predetermined critical running speed, the bogie moves with a tendency motion and a sideways motion.
If the vehicle yaws and the traveling speed further increases, it will eventually lead to zigzag travel. As a result, the wheel flange comes into contact with the rail, thus leading to increased running instability of the vehicle and high friction between the wheel flange, rail and superstructure. If the rotational resistance of the bogie is increased accordingly by adjusting the rotational restraint in a conventional manner, running stability can be achieved, but at the same time the curving performance of the bogie is reduced.

The foregoing can be avoided in some cases by using a rotational restraint device which reduces the rotational resistance as the rotation of the bogie increases around the curve (German Published Patent Application No. 24 33 028).

Furthermore, an oil damper with a variable orifice is provided between the car body and the bogie to prevent lateral vibration and rotational vibration of the bogie, and to respond to changes in the amount of movement between the car body and the bogie on curved roads and straight roads. There is an oil damper in which the opening area of the variable orifice of the oil damper is changed to reduce the lateral force on curved roads (Japanese Patent Application Publication No. 16004-1983).
issue).

However, since these methods are controlled in response to curves, that is, curved roads, the running stability of the bogie tends to decrease during high-speed operation.

The object of the invention is to ensure that the running stability of the bogie does not decrease even during high-speed operation, by making it possible for the rotational resistance to be adapted to the vibration state of the bogie at each operating speed with respect to a given stability criterion. In other words, by reducing the speed to the maximum extent necessary for each driving speed, curve running performance is also taken into consideration, and so that it can work without excessively impeding it, as described at the beginning. The purpose of this invention is to configure a rotation suppressing device of various types.

The problem is that each rotation suppressor includes a controller that takes at least a measurement of the operating speed, thereby increasing the degree of movement or power transmission of the rotation suppressor as the operating speed increases and decreasing the operating speed. This problem is solved by using a controllable mechanism such that the amount decreases as the amount increases.

By controlling each rotation suppressor to a rotation suppression value obtained according to the measured value of the running speed, the rotation of each rotation suppressor or the degree of power transmission of each rotation suppressor increases as the running speed increases. It also needs to be reduced as the running speed decreases, so that the running stability of the bogie is maintained over the entire speed range. In this case, the controller is provided with a measured value of the rotation of the bogie relative to the track, with which the rotation suppressor or rotation suppressor can be activated, if necessary, in addition as a function of the track state. With regard to stabilization, it is eventually also possible to supply this controller instead of speed measurements with measurements of the sinusoidal oscillations of the bogie that begins to resonate, thereby making it possible to respond directly to instability.

Preferred embodiments of the invention are characterized in the dependent claims.

The rotation suppression device according to the invention therefore provides suitable means for improving the running characteristics of bogies.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The drawing is a plan view of a railway vehicle existing on a rail 1, and schematically shows only a bogie 2 and a vehicle frame 3 or a half of a vehicle body frame mounted thereon. This bogie is mounted in a known manner so as to be rotatable relative to the vehicle frame 3, for example by means of a central pin, not shown. During driving, the rotational movement of the bogie 2 is controlled for driving stability by a rotation suppressor 4, which acts as a controllable electromagnetic clutch. As is known, one such integrally actuated clutch is a magnetic powder in which the frictional action of magnetizable iron powder mixed with oil or graphite is utilized to transmit power or torque. In the clutch, the slip is adjusted by varying the excitation current. Since the details regarding this are generally known, their explanation will be omitted. Rotation suppressor 4 for special application cases
also comprises a housing 4.1 which is curved in response to the rotation of the bogie and which is fixed to the vehicle frame 3 via a support 5. A push rod 4.2, which is connected to the bogie 2 via a centering rod 6 and is correspondingly curved, is movably arranged in the housing 4.1, the remaining hollow space of the housing being defined by the previously described oil or a mixture 7 of graphite and iron powder. Accordingly, in the case of this rotation suppressor 4, its movement or the transmission of power between the push rod 4.2 and the housing 4.1 takes place via the mixture 7, so that the excitation due to the rather strong magnetization of the iron powder takes place. With the aid of an electric current, the rotational resistance of the rotation suppressor or bogie 2 can be varied to a large extent. The variation of the control or excitation current of the rotation suppressor 4 is carried out with the aid of a controller 8 (e.g. a state controller) which is dependent on the operating speed, so that the rotational resistance is varied in proportion to the operating speed. It will be done. The speed measurements can be supplied to the controller 8 from a pulse transmitter 10 fixed to the axle 9.

Instead of the above configuration, the controller 8 may, of course, provide a measured value of the frequency of the bogie bogie sine vibration that also begins to resonate through an accelerator, although this is not shown in the drawings. In both configurations, the rotational resistance of the rotation suppressor 4 or the bogie 2 is adapted to each running condition, and running stability is achieved. If a threshold value circuit (not shown) is provided downstream of the controller 8, this rotation suppressor is activated only when a certain rotation or running instability of the bogie is exceeded, depending on the stabilization conditions of the suppressor. It is ensured that the guiding function is fulfilled. In this connection, for example, a plurality of transmitters can be provided which are offset relative to the center of the vertical axis of the bogie 2 in the transverse plane, and which transmitters are arranged at the ends of the bogies of the bogie relative to the rails 1. Each measured value of the distance is provided, so that the rotation of the bogie can be detected by forming a difference value. Therefore, the curve running performance of the bogie 2 by the rotation suppressor 4 is hindered only to the extent necessary to maintain running stability.

In the event of a failure of the control device, the rotational resistance of the rotation suppressor 4 is constantly regulated by means of an excitation current of a predetermined value for a constant (high) vehicle speed.

[Brief explanation of the drawing]

The only accompanying drawing is a plan view schematically showing the outline of the body of the bogie of the vehicle on the track and the vehicle frame 3 resting on it. 2...Bogie truck, 3...Vehicle frame, 4...
...Rotation suppressor, 8...Controller.

Claims (1)

[Claims] 1. In a rotation suppressing device for a bogie bogie of a railway vehicle in which one or a plurality of rotation suppressors connect a bogie bogie and a vehicle frame mounted thereon, each rotation suppressor 4 has at least A controller 8 is provided for obtaining a measurement of the vehicle speed, by means of which the degree of movement or power transmission of the rotation suppressor 4 can be controlled to increase as the vehicle speed increases and decrease as the vehicle speed decreases. A rotation suppressing device characterized by having a mechanism. 2. Rotation restraint device according to claim 1, characterized in that the rotation restraint device 4 comprises a controllable, in particular an integrally actuated clutch, such as an electromagnetic clutch. 3. A rotation suppressor according to claim 1, characterized in that the rotation suppressor 4 comprises a magnetic powder clutch.