• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Air suspension device for a rail vehicle, comprising an air spring (1), wherein in the air spring (1) comprising gas volume (2) via a line (3) with a control volume (5) of a control volume container (4) is connected, wherein the control volume (5 ) By means of a power-assisted actuator in its volume is changeable.
    公开号:AT514458A1
    申请号:T50410/2013
    申请日:2013-06-20
    公开日:2015-01-15
    发明作者:Walter Dipl Ing Gunselmann；Martin Dipl Ing Kollmann
    申请人:Siemens Ag Österreich；
    IPC主号:
    专利说明:

    Confession
    Air suspension device for a rail vehicle.
    Technical area
    The invention relates to an air suspension device for a rail vehicle.
    State of the art
    Passenger rail vehicles are very often equipped with air suspension. It is per chassis and each side of the vehicle filled with compressed air bellows made of elastic material between the chassis and the car body arranged, which can ensure the resulting distortion during cornering between said components of about 8 degrees. This type of suspension brings a lot of advantages, for example, it offers very good suspension properties in a small footprint. In particular, however, level compensation can be realized very easily by means of air suspension. For this purpose, the air pressure system of the air spring is to be equipped with means for aeration and ventilation, as well as to provide means for detecting the current deflection. Such can be an automatic
    Level control can be created, which allows, for example, that subways always have the lowest possible level difference between the platform and the passenger floor level, regardless of their loading condition. In this case, a typical air spring has a volume of about 401, wherein the pressure in a range of about 2 to 5 bar is regulated. This type of level control is known for a long time from the prior art, but requires a vehicle-side compressed air supply. Recent rail vehicle developments aim to eliminate the need for compressed air supply, as it includes a variety of expensive, heavy and maintenance-intensive components. A vehicle without on-board compressed air supply must ensure the operation of previously operated with compressed air devices and components in other ways. For Bremen, door actuation, sliding steps, etc. electrical alternative drives have already been developed. If an airless suspension is to be created, it is possible, for example, to resort to conventional steel blade or helical or spiral suspension. However, this is associated with a variety of disadvantages, such as increased weight or increased space requirements. Likewise, a level control is very complicated and complicated to implement.
    Presentation of the invention
    The invention is therefore based on the object to provide an air suspension device for a rail vehicle, which provides a level compensation option, with no vehicle-side compressed air supply is required.
    The object is achieved by an air suspension device having the features of claim 1 and a rail vehicle according to claim 11. Advantageous embodiments are the subject of the subordinate claims.
    According to the basic idea of the invention, an air suspension device for a rail vehicle is constructed, which comprises an air spring, wherein the volume of gas contained in the air spring is connected via a line to a control volume of a control volume container, and wherein the control volume by means of a force-assisted
    Actuator is variable in its volume.
    As a result, the advantage can be achieved to be able to change the pressure in this air suspension device constructed in this way, without the need for an external compressed air supply. In this way, it is possible to build a closed air spring system, which retains all the advantages of a conventional air suspension, but only requires electrical energy.
    According to the invention, the volume contained in the air spring is connected via a line with a control volume. These three volumes (air spring, line and control volume) can be filled with gas via a filling device, or the gas can be discharged via this filling device. This gas filling is to be carried out at start-up of the air spring device and it may optionally be refilled with a pressure drop gas.
    Advantageously, the air spring device is equipped with a pressure determining device (manometer), which is able to deliver a signal to a vehicle control. As a result, an occurring pressure loss can be detected early and gas refilling done.
    Should the air spring device become leaky, i. lose the entire gas filling, so the air spring drops to its lowest possible geometric level. One
    Passenger rail vehicle is still safe to operate according to the relevant approval standards even with vented air spring device, so that there is no danger of failure of the air spring device. However, it is to be expected with a reduced ease of entry for the passengers, since a step between the passenger compartment floor and the platform level is inevitable.
    The reliability of an inventive
    Air spring device is higher than that of the common, connected to a central compressed air supply air springs. The smaller number of components, components and sealing points in an air spring device according to the invention cause a lower failure rate.
    According to an advantageous embodiment of the invention, the line between the air volume of the air spring and the control volume is to be such that it has such a flow resistance that a rapid overflow of gas between these volumes is prevented. Thus, the spring constant of the air spring device is determined only by the air spring and the control volume does not increase, or only with a delay in the dynamic spring events part. The static load balance, by changing the weight of the vehicle takes place much slower than the dynamic suspension operations by braking, cornering or track bumps. Due to its volume change, the control volume only provides different gas pressures for the air spring. While more dynamic
    Suspension operations carried out by the air spring, the control volume continues to be subjected to substantially the same pressure, since the rapidly changing pressures in the air spring due to the flow resistance in the line affect only delayed in the control volume.
    In contrast, if the line between the air spring and the control volume designed so that a rapid overflow of the gas is possible, the control volume can be used to tune the spring characteristic in addition. Thus, the spring constant of the air spring device can be optimized with the help of the air spring, the control volume and the line for the particular application. By appropriate design of the line, it is possible to tune the damping and the natural frequency of the air spring device.
    According to one embodiment of the invention, the control volume container is constructed as a piston-cylinder system, on which a piston is slidably mounted in a cylinder and thereby encloses the control volume, or pretends this control volume.
    A further advantageous embodiment provides a control volume container, which is designed as a solid hollow body with an elastic membrane sealing against the atmosphere. In this case, an actuating force acts from outside the control volume container on the membrane and thus changes the control volume. As a result, the advantage can be achieved, compared with the piston-cylinder system, a sealing point (piston against cylinder wall) can be omitted.
    According to a further advantageous embodiment, the control volume container is designed in the manner of the bellows, wherein a force-actuated change in length of the bellows causes a change of the control volume located in the bellows.
    The drive of the power assisted actuator by means of an electric motor and a suitable control or regulating device. In this case, the control device comprises means to determine the instantaneous level of the car body over the track and to close from this reading to a required Druckhöhung- or pressure reduction in the air spring and to control the electric motor accordingly.
    It is advisable to equip the power transmission between the electric drive and the control volume container with a mechanical self-locking, such as a worm gear. In this way, in the event of a defect in the electric drive, the current position of the drive mechanism and the current pressure in the air suspension system can be maintained.
    The electric motor and the associated control or regulating device can be equipped so that at a pressure reduction in the air spring, so an increase in the control volume, the stored in the air spring pneumatic energy is recovered. In this case, in a return of the power-assisted actuator by means of the electric motor in the generator mode electrical energy is generated and fed back via the associated control or regulating device in the electrical system. For the realization of this function, no mechanical self-locking can be provided.
    It is also advisable to fill the air suspension system with a gas other than air. In this case, gases which are suitable for the filling of tires are particularly advantageous because due to the lower diffusion rate of these gases through the rubber
    System pressure can be maintained for much longer periods. Typically, nitrogen, nitrogen-enriched air or sulfur hexafluoride is suitable for this use.
    The arrangement of the control volume container and the other components such as the electric drive can also be spaced from the air spring, in particular below the car body. As a result, the advantage can be achieved to be able to use the greatest possible flexibility in the arrangement of the components on the underside of the wagon. However, it is also possible to arrange all the components on the chassis (bogie), so that only electrical lines are to be led to the bogie, since all pressurized components are arranged directly on the bogie. As a result, a lesser amount of time for the disassembly of the chassis is to be expected in the case of maintenance.
    A further advantageous embodiment of the invention provides to equip the drive mechanism with an operating point in which the drive mechanism is held by spring force, wherein the force resulting from the pressure in the air suspension device acts against this spring force. As a result, the control volume in this neutral position assumes a certain value. The electric drive must apply in this embodiment, only the relative force (differential force) between the pressure force and the spring force and thus can be made smaller.
    Brief description of the drawings
    They show by way of example:
    Fig.l An air suspension device with a piston-cylinder system.
    Fig.2 An air suspension device with a hollow body membrane system.
    Fig.3 An air suspension device with a bellows. Fig.4 An air suspension device with a piston-cylinder system with spring support.
    EMBODIMENT OF THE INVENTION FIG. 1 shows an example and schematically a
    Air suspension device with a piston-cylinder system. It is an air suspension device shown, which is an air spring 1 with a Luftfedergasvolumen 2, a control volume tank 4 with a control volume 5 and a Luftfedergasvolumen 2 with the control volume 5 connecting line 3. The air spring 1 is as commonly used between a bogie 6 and a car body. 7 arranged. The control volume container 4 is formed as a piston-cylinder system, wherein a arranged on a rod 8 piston includes a control volume 5, or this pretends. The piston is sealed against the inner wall of the cylinder so that the system can sustain the pressure for a longer time. The rod 8 is part of a power assisted actuator which still includes an electric drive and a transmission. The latter components are not shown in Fig. 1. The electric drive acts on the rod 8 and changes its position linearly in a predetermined direction. In this way, the rule volume 4 is variable. Furthermore, the air suspension device comprises a filling device 10, which as
    Valve on the line 3 is executed. By means of this filling device 10, the volume of the air spring 1, the control volume 5 and the line 3 can be filled with a gas, or the gas can be removed from these components. A pressure determining device 9 is connected to the line 3, it determines the currently prevailing in the system gas pressure and comprises means to deliver a pressure equivalent to this signal to a control. By this pressure determination device 9, a fault in the air suspension device can be detected, for example, a pressure loss or blocking of the drive. Other components, such as level sensors or a control device are not shown to simplify the illustration in Fig. 1.
    2 shows an example and schematically a
    Air suspension device with a hollow body membrane system. It is shown an air suspension device, which substantially corresponds to the embodiment shown in FIG. 1, but the control volume container 4 is designed as a hollow body membrane system. Of the
    Regular volume container is designed as a hollow body (typically in cylindrical form), wherein a lateral surface is sealed by a membrane 11 against the ambient pressure.
    On this membrane 11 of the electric drive via the rod 8th
    3 shows an example and schematically an air suspension device with a bellows. An air suspension device is shown, which essentially corresponds to the exemplary embodiment illustrated in FIG. 1, but the control volume container 4 is designed as a bellows. In this case, the electric drive via the rod 8 acts on the control volume container 4, which by the execution as
    Bellows a variable length, and thus has a variable control volume 5.
    4 shows an example and schematically a
    Air suspension device with a piston-cylinder system with spring support. It is shown the Luftfederungseinrichtung of Fig.l, wherein the rod 8 is acted upon by a spring 13 with a spring force. This spring force counteracts the gas pressure acting on the rod 8. In this embodiment, the rod 8 is designed as a rack in which a pinion 12 engages an electric drive. Upon expansion of the gas volume contained in the suspension system, the gas pressure energy is thus converted into potential energy of the tensioned spring and is then available to assist in a subsequent compression process.
    List of terms 1 Air spring 2 Air spring gas volume 3 Line 4 Control volume tank 5 Control volume 6 Bogie 7 Car body 8 Bar 9 Pressure determination device 10 Filling device 11 Diaphragm 12 Pinion 13 Spring
    权利要求:
    Claims (11)
    [1]
    1. Air suspension device for a rail vehicle, comprising an air spring (1), characterized in that in the air spring (1) comprised gas volume (2) via a line (3) with a control volume (5) of a control volume container (4) is connected , wherein the control volume (5) by means of a power-assisted actuator in its volume is changeable.
    [2]
    2. Air suspension device for a rail vehicle according to claim 1, characterized in that the control volume container (4) is designed as a cylinder with a sealing against the cylinder wall piston, wherein the change of the control volume (5) by means of displacement of the piston.
    [3]
    3. Air suspension device for a rail vehicle according to claim 1, characterized in that the control volume container (4) is designed as a solid hollow body with a sealing against the atmosphere elastic membrane (11), wherein the change of the control volume (5) by means of a outside of the Regelvolumenbehälters (4) on the membrane (11) acting actuator takes place.
    [4]
    4. Air suspension device for a rail vehicle according to claim 1, characterized in that the control volume container (4) is designed as a flexible bellows, wherein the change of the control volume (5) takes place by means of change in length of the bellows.
    [5]
    5. Air suspension device for a rail vehicle according to one of claims 1 to 4, characterized in that the force-assisted actuating device is designed as an electric drive.
    [6]
    6. Air suspension device for a rail vehicle according to claim 5, characterized in that the power-assisted actuator is designed to be self-locking and retains the assumed position further in case of failure of the electrical power supply.
    [7]
    7. Air suspension device for a rail vehicle according to one of claims 1 to 6, characterized in that a filling device (10) is provided which the inflow or outflow of gas into the volume (2, 3, 5) of the air spring (1), the line (3) and the control volume (5) allows.
    [8]
    8. Air suspension device for a rail vehicle according to one of claims 1 to 7, characterized in that a pressure determining device (9) is provided, which can determine the existing in the volumes (2, 3, 5) of the air suspension pressure and a pressure corresponding to this electric Can deliver signal.
    [9]
    9. Air suspension device for a rail vehicle according to one of claims 1 to 8, characterized in that the conduit (3) has such a flow resistance that a rapid overflow of the gas between the Luftfedergasvolumen (2) and the control volume (5) is prevented, so the control volume (5) does not affect the suspension properties of the air spring (1).
    [10]
    10.Luftfederungseinrichtung for a rail vehicle according to one of claims 1 to 9, characterized in that the Luftfedergasvolumen (2), the conduit (3) and the control volume (5) is filled with nitrogen or sulfur hexafluoride or with air with increased nitrogen content
    [11]
    11. Rail vehicle, comprising at least one air suspension device according to one of claims 1 to 10.
    类似技术:
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    同族专利:
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    引用文献:
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    CN109990036B|2019-01-24|2020-07-31|中北大学|Three-stage gas-liquid composite quick response suspension control method|
    CN109703316B|2019-01-24|2020-07-31|中北大学|High, medium and low three-level composite quick response suspension device|
    法律状态:
    2019-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20180620 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50410/2013A|AT514458B1|2013-06-20|2013-06-20|Air suspension device for a rail vehicle|ATA50410/2013A| AT514458B1|2013-06-20|2013-06-20|Air suspension device for a rail vehicle|
    PCT/EP2014/062760| WO2014202631A1|2013-06-20|2014-06-17|Pneumatic-suspension unit for a rail vehicle|
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