CN111148680A

CN111148680A - Rim lubrication system

Info

Publication number: CN111148680A
Application number: CN201880065011.4A
Authority: CN
Inventors: H.吉芬
Original assignee: Siemens Mobility Austria GmbH
Current assignee: Siemens Mobility Austria GmbH; Siemens Mobility GmbH
Priority date: 2017-10-03
Filing date: 2018-09-27
Publication date: 2020-05-12
Also published as: WO2019068561A1; AT520095A4; AT520095B1; EP3645367A1

Abstract

The invention relates to a rim lubrication system for a rim of a rail vehicle wheel (1), comprising a lubrication pin (2), wherein the lubrication pin (2) is supported in a longitudinally movable manner and can be moved out and in by means of a force-operated clamping device (3).

Description

Rim lubrication system

Technical Field

The present invention relates to a rim lubrication system for a rim of a rail vehicle wheel.

Background

To reduce wear of the wheel rim and the rail, a wheel rim lubrication system is often used. Here, it is also important for a dry wheel-rail contact to prevent noise generation, since the wheel disk can be excited to produce vibrations in the audible frequency range due to friction in this position. Lubricant is typically applied to the wheel rim on the foremost wheelset of the rail vehicle. Here, it is important that such lubricants are not applied in such large amounts: the lubricant is allowed to reach the rolling surface of the wheel and in this case the wheel-rail friction can be reduced, since the braking action can be severely adversely affected thereby. Different methods for applying lubricant are known, for example, so-called lubricating pins consisting of dry lubricant can be pressed onto the wheel rim by means of a spring force. This ensures a continuous lubrication, which is however superfluous, for example, on long, straight lines. Such lubricating pins are of course subject to wear and are therefore regularly monitored and replaced if necessary. Another relatively expensive way of lubricating the rim is: a viscous lubricant is applied by means of compressed air. The lubricant prepared in the tank is sprayed onto the wheel rim by means of a nozzle in the immediate environment of the wheel rim, supported by compressed air. The lubricant is metered in this case by the timing of the injection process (Taktung) as a function of time or distance covered. Such compressed air systems are expensive to manufacture and maintain and, moreover, there is no guarantee in these lubrication solutions that the lubrication is carried out at the right moment. Lubrication after narrow curved rails (Gleisbogen) is superfluous, for example. A stationary lubricating device for lubricating the wheel rim of a driven wheel set represents another possible option for applying lubricant. Such devices are used, for example, for trams in front of sections with a small track radius. All rim lubrication solutions known from the prior art have the disadvantage that either the lubrication at a certain moment is not sufficiently ensured or an excessive continuous lubrication is performed.

Disclosure of Invention

The object of the present invention is therefore to specify a rim lubrication system which uses a predefined lubricant reserve economically, has a low maintenance outlay and can be constructed very cost-effectively.

Said task is solved by a rim lubrication system according to claim 1. Advantageous embodiments are the subject matter of the dependent claims.

According to the basic idea of the invention, a rim lubrication system for a rim of a wheel of a rail vehicle is constructed, comprising a lubrication pin, wherein the lubrication pin is supported in a longitudinally movable manner and can be moved out and in by means of a force-operated pressing device.

The advantage is thereby obtained that lubrication can be carried out by the lubricating pin in certain situations, wherein in particular the continuous lubrication which is usually carried out when rim lubrication is carried out by means of the lubricating pin is dispensed with. In this way, the lubricant is not wasted by continuous lubrication, but is used only when it is needed. Compared to a lubricant-injected rim lubrication system, the rim lubrication system according to the invention is of a considerably simpler and less expensive construction, since all lines (compressed air, lubricant) can be dispensed with.

According to the invention, the lubricating pin is supported in a longitudinally displaceable manner and can be moved out and in by means of a force-actuated holding-down device. This can be done, for example, by means of an electromagnet or an electric motor. Also, handling by means of compressed air is possible, but this requires a corresponding duct structure in the frame and thus the advantages inherent in the specific invention are dispensed with.

The force-actuated hold-down device should preferably be arranged in the chassis or bogie of the rail vehicle in such a way that, when the lubricating pin is removed, only a relative movement is carried out with respect to the surface of the wheel to be lubricated. Additional relative movements, for example due to inward bouncing of the vehicle, should be avoided. In this way, mechanical loading of the lubricating pin, in particular transversely to its longitudinal axis, is avoided. For this purpose, the force-actuated hold-down device can be arranged on the chassis in the following positions: the position does not move relative to the surface of the wheel to be lubricated during operation. Such a position can be found, for example, on a component which is within a so-called unsprung mass.

The movement of the lubricating pins is controlled by means of a control device which actuates the force-actuated holding-down device as a function of specific control signals which are supplied to the control device via a data interface. This control device comprises corresponding electronic circuits for actuating the electric motor or electromagnet and circuits for signal processing.

Typically, a control device for the two pressing devices of the shaft which has already been lubricated can be provided.

The lubrication process is preferably triggered as a function of the position of the vehicle on the route, so that the necessary degree of lubrication is ensured in a timely manner before the relevant section of the road, for example a narrow curved track. For this purpose, the control signal supplied to the control device can comprise information about the current position of the rail vehicle on the track, so that the control device triggers the lubrication process. For this purpose, a data record representing the line is stored in the control device, in which data record also the points at which lubrication should be performed are stored.

A further embodiment of the invention provides for the line data usually stored in the vehicle control system to be augmented with the necessary lubricating points and for a control signal to be supplied to the control device of the rim lubrication system, which control signal initiates the lubrication process. In this way, the control device can be implemented more easily, since it does not have to save line data.

The duration of the lubrication process should be determined according to the properties of the lubrication pins used, for which purpose it is necessary to ascertain by experiment, if necessary, the optimum duration for applying a sufficient quantity of lubricant to the wheel rim.

A preferred embodiment of the invention provides that the force-actuated holding-down device is designed such that: a wear indication signal is output to the control device when a specific displacement amplitude of the lubricating pin is present. The control device can therefore output a signal to a vehicle control system which displays the wear of the progress of the lubricating pin to the driver or maintenance person. The advantages that can be obtained in this way are: simplified maintenance can be performed, since the lubricating pins do not need to be monitored during their service life and are therefore replaced only in the event of an incentive.

In a further development of the invention, it is recommended that the force-actuated holding-down device is equipped with means for limiting the maximum displacement force acting on the lubricating pin. It is thus ensured that the lubricating pin is not subjected to wear due to excessive contact pressure.

Drawings

FIG. 1 exemplarily illustrates a rim lubrication system.

Detailed Description

Fig. 1 shows an exemplary and schematic representation of a rim lubrication system. A rim lubrication system for a rail vehicle wheel 1 is shown, wherein the view is oriented normal to the axis of rotation of the rail vehicle wheel 1. The force-operated pressing device 3 comprises a linear movement mechanism for the lubricating pin 2. The lubricating pin 2 is in contact on one end with the rim of the rail vehicle wheel 1, the position of the lubricating pin 2 being shown in fig. 1 during the lubricating process. Furthermore, the force-actuated holding-down device 3 comprises a force drive for moving the lubricating pin 2 in the insertion and removal direction. The rim lubrication system is equipped with a control device 4 which controls the movement of the lubrication pins 2. For this purpose, the control device 4 is connected to the force-actuated tensioning device 3, wherein signals can be transmitted between the force-actuated tensioning device 3 and the control device 4 by means of this connection, which signals are signals of the movement of the lubricating pin 2 and other signals, for example, with regard to the current displacement amplitude of the lubricating pin 2 or faults in the force-actuated tensioning device 3. Electrical energy can be supplied to the force-actuated holding-down device 3 via the control device 4 or via a direct connection of the force-actuated holding-down device 3 to the electrical network of the rail vehicle. Furthermore, the control device 4 is equipped with a data interface for transmitting control signals 5 to a vehicle control system, via which either the position of the vehicle on the route can be transmitted to the control device 4 or instructions for carrying out the lubrication process and status or fault information can be transmitted to the control device 4. In fig. 1 one wheel of the wheel set is shown for simplicity of illustration, but a typical rim lubrication system lubricates both wheels of the wheel set, whereby the control device 4 also comprises a connection to the second force-operated pressing device 3.

List of reference numerals:

1 a rail vehicle wheel;

2 lubricating the pin;

3 a force operated hold down;

4 a control device;

5 control signals.

Claims

1. A rim lubrication system for a rim of a rail vehicle wheel (1) comprises a lubrication pin (2),

it is characterized in that the preparation method is characterized in that,

the lubricating pin (2) is mounted so as to be longitudinally displaceable and the pressing device (3) actuated by force can be moved out and in.

2. Rim lubrication system according to claim 1,

characterized in that a control device (4) is provided, which actuates the force-actuated holding-down device (3) as a function of a specific control signal (5) supplied to the control device (4).

3. Rim lubrication system according to claim 2,

characterized in that the control signal (5) comprises information about the current position of the rail vehicle on the track.

4. Rim lubrication system according to claim 3,

characterized in that the force-actuated pressing device (3) outputs a wear indication signal to the control device (3) in the event of a defined removal extent of the lubricating pin (2).

5. Rim lubrication system according to any of the claims 1-4,

characterized in that the force-actuated pressing device (3) comprises means for limiting the maximum displacement force acting on the lubricating pin (2).

6. Rim lubrication system according to any of the claims 2-5,

characterized in that the control device (4) comprises a data interface for the vehicle control system for transmitting control commands and feedback.

7. Railway vehicle comprising a rim lubrication system according to any of claims 1 to 6.