EP3129272B1 - Chassis for a rail vehicle - Google Patents
Chassis for a rail vehicle Download PDFInfo
- Publication number
- EP3129272B1 EP3129272B1 EP15734129.8A EP15734129A EP3129272B1 EP 3129272 B1 EP3129272 B1 EP 3129272B1 EP 15734129 A EP15734129 A EP 15734129A EP 3129272 B1 EP3129272 B1 EP 3129272B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- hydraulic
- chassis
- wheelset
- fluid chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000012530 fluid Substances 0.000 claims description 168
- 230000001133 acceleration Effects 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 description 11
- 239000000806 elastomer Substances 0.000 description 11
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000003137 locomotive effect Effects 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010038743 Restlessness Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F3/00—Types of bogies
- B61F3/02—Types of bogies with more than one axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F3/00—Types of bogies
- B61F3/02—Types of bogies with more than one axle
- B61F3/08—Types of bogies with more than one axle without driven axles or wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
- B61F5/32—Guides, e.g. plates, for axle-boxes
- B61F5/325—The guiding device including swinging arms or the like to ensure the parallelism of the axles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/38—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
- B61F5/386—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles fluid actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/50—Other details
- B61F5/52—Bogie frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
Definitions
- the invention relates to a chassis for a rail vehicle.
- the invention further relates to a rail vehicle and a computer program.
- the Utility Model CN 201914271 U shows a wishbone for a locomotive.
- the translation DE 699 20 527 T2 the European patent specification EP 1 228 937 B1 shows a device for controlling the axes of a rail vehicle.
- the object underlying the invention can be seen to provide an improved chassis for a rail vehicle.
- the object underlying the invention can also be seen to provide a corresponding method for operating a chassis for a rail vehicle.
- the object underlying the invention can be seen to provide a corresponding rail vehicle.
- the object underlying the invention can also be seen to provide a corresponding computer program.
- a rail vehicle which comprises the chassis according to the invention.
- a computer program which comprises program code for carrying out the method according to the invention when the computer program is executed on a computer.
- the invention therefore encompasses the idea of setting a longitudinal rigidity of a hydraulic bushing of a bearing of a wishbone by setting a specific hydraulic pressure in the hydraulic bush, more precisely in the fluid chamber.
- the active adjustment of the longitudinal rigidity can thus advantageously actively influence the shaft travel. This can be detected indirectly via a measurement of the wheelset accelerations. Since the adjustment is based on or depending on the wheelset accelerations, the shaft run can be influenced in such a way that optimum tracking can be effected with minimum wear.
- the shaft running of the wheelsets results from the vehicle run in the track and is caused by the existing contact geometry between the wheel profile and rail profile, which simplifies a cone that rolls with its lateral surface on a plane corresponds.
- the cone will always roll on a circular path according to its angle.
- the wheel set corresponds to two oppositely arranged cones, which are rigidly connected to an axle.
- the shaft running frequency is dependent on the vehicle speed and the formation of the rigidity of the axle guide along and transverse to the vehicle longitudinal axis.
- a soft axle guide favors the turning movement and thus the Radial einsshredded the wheelsets, so the positive sheet travel behavior in track curves with relatively slow driving speed, but leads to straight-line driving at high vehicle speed to unstable wave.
- the turning moments of the wheel set thus generated during vehicle running in the track result together with the tensile or braking forces from the drive and brake in the vehicle in corresponding forces and accelerations, which act longitudinally, transversely and as a turning moment about the vertical axis of the wheelset.
- this wave is actively influenced, in which the longitudinal stiffness of the hydraulic bushing means Adjusting the hydraulic pressure in the fluid chamber is changed.
- an unfavorable wave run can be compensated so that wear can be minimized and a stable straight-ahead travel can be achieved.
- the setting device is designed to set a predetermined time profile of the hydraulic pressure as a function of the measured Radsatzbeuggung in order to impart to the wheelset a corresponding time profile of a turning moment.
- the adjusting device is designed to actively impart a turning moment to the wheel set corresponding to this fluid chamber by adjusting the hydraulic pressure in the fluid chamber.
- the technical advantage is effected that an active steering is made possible by adjusting the hydraulic pressure.
- the turning moment can advantageously compensate for an unstable driving course.
- the bearing with the fluid chamber is the wheel set side bearing.
- the adjusting device has a pressure accumulator connectable to the fluid chamber.
- the pressure accumulator is in particular designed to receive and dispense the hydraulic fluid. This means that the pressure accumulator in particular receives and releases the hydraulic fluid.
- a valve for example a switching valve, is between the fluid chamber and the pressure accumulator intended.
- the adjusting device has a pressure generating device that can be connected to the fluid chamber.
- a pressure generating device that can be connected to the fluid chamber.
- the frame-side bearing elastomer bushing with constant longitudinal and transverse stiffness and the wheelset side bearing hydraulic bushings with constant transverse stiffness and variable longitudinal stiffness are provided.
- the bearings of each wishbone are arranged on the corners of each of a horizontally oriented, isosceles triangle whose tip form the wheel set side bearing and the base of the frame side bearing. Due to the arrangement of the bearings distributed symmetrically to the longitudinal direction on the corners of an isosceles triangle, a particularly high transverse rigidity of the Wishbone, for example, determined by the properties of the elastomer in the bearings.
- each hydraulic bushing has a fluid chamber lying in the longitudinal direction and a fluid chamber located in the longitudinal direction, which are arranged opposite each other in the longitudinal direction and filled with the hydraulic fluid, wherein at each fluid chamber, a fluid channel for on or discharge of Hydraulic fluid is connected in the respectively from the fluid chamber, wherein the adjusting device is hydraulically coupled to the fluid channels and adapted to set a one or flow of hydraulic fluid, so that the hydraulic pressure in the fluid chambers can be adjusted by means of outflow or inflow of hydraulic fluid.
- valves are provided in the fluid channels that can be controlled.
- these valves can be opened and / or closed and / or controlled such that a flow cross section in the fluid channel changed, that is, for example, increased or decreased, is.
- a longitudinal rigidity is advantageously effected in an advantageous manner.
- a specific turning moment can advantageously be impressed on the wheel set. This can compensate, for example, a wave so that wear and / or a restless ride can be minimized.
- Lying on the inside and outside are here in relation to the longitudinal direction, which is defined as running parallel to the travel or rail direction designated.
- the longitudinal direction of the first and second wheels are behind each other - different expressed, on both sides of a chassis middle - arranged, wherein an inner fluid chamber facing the center of the chassis and an outer fluid chamber of the center of the chassis are arranged facing away.
- arranged on the same suspension side hydraulic bushes are connected via external fluid channels such that the outer fluid chamber of the first set of wheels with the inner fluid chamber of the second set and the inner fluid chamber of the first set of wheels with the outer fluid chamber second set of wheels are hydraulically coupled, wherein the adjusting device is hydraulically coupled to the external fluid channels.
- each of the hydraulic bushes in each case has an internal fluid channel, via which the outer fluid chamber and the inner fluid chamber of the same hydraulic bushing are hydraulically coupled, wherein the adjusting device comprises switchable valves, wherein each internal fluid channel is associated with a switchable valve , by means of which a flow of hydraulic fluid through the fluid channel is adjustable.
- Internal within the meaning of the present invention means in particular that an internal fluid channel runs within the hydraulic bushing. Internal within the meaning of the present invention also means that such an internal fluid channel can indeed run outside the hydraulic bushing, but only connects or hydraulically couples the internal fluid chamber to the outer fluid chamber of the same hydraulic bushing.
- the individual fluid chambers of the hydraulic bushes are coupled to each other as above in connection with the external and internal fluid channels, but in the fluid channels, ie both in the external and / or internal fluid channels, valves, for example switching valves, are provided to effect the respective coupling states by correspondingly closing or opening these valves.
- valves for example switching valves
- a pressure sensor is provided for measuring a hydraulic pressure in the fluid chamber.
- the pressure sensors are individually and / or serially connected to a pressure monitoring device, and wherein the pressure monitoring device is designed to transmit a warning signal to a central control unit of the rail vehicle, if individual and / or all pressure sensors respond.
- the pressure sensors measure the pressure prevailing in coupled fluid chambers, and a switch is closed when the pressure falls below a threshold. In individual connection of the pressure sensors with the pressure monitoring device can be determined separately there for each hydraulic jack, whether there is a critical pressure drop.
- a third set of wheels is arranged between the first set of wheels and the second set of wheels.
- the invention so far described for biaxial chassis is also applicable to three-axle chassis, where between the first and second wheelset as the outer wheel sets still a third, inner wheel is arranged.
- a fluid channel is formed as a rigid conduit or as a flexible hose.
- the fluid channels are in particular the same or, for example, differently formed.
- the rail vehicle is a locomotive, a locomotive, a tram, a subway or a rapid-transit railway.
- Embodiments in connection with the chassis apply analogously to embodiments with regard to the method and vice versa. This means that features and / or advantages, as described in connection with the chassis, apply analogously to the method and vice versa.
- the chassis frame 2 is supported at least on a first set of wheels 3 and a second set of wheels 4, which are referred to collectively below as wheelsets 3 and 4.
- Each of the wheelsets 3 and 4 has two rail wheels 5, which are connected by a mounted in two axle bearings 6 wheel axle 7.
- For horizontal axle guidance of the wheelsets 3 and 4 these are each articulated on both chassis sides via wishbones 8 on the chassis frame 2.
- Each wishbone 8 is connected to a journal bearing 6 by a wheel-set side bearing 9 and the chassis frame 2 by two frame-side bearing 10 articulated.
- the frame-side bearing 10 have elastomer bushes 11 with constant longitudinal and transverse stiffness and the wheelset bearing 9 hydraulic bushes with constant transverse stiffness and variable longitudinal stiffness.
- the bearings 9 and 10 of each wishbone 8 are arranged on the corners of each of a horizontally aligned, isosceles triangle whose tip form the wheel-set side bearing 9 and the base of the frame-side bearing 10.
- the bearings 9 and 10 of each wishbone 8 are arranged on the corners of each of a horizontally aligned, isosceles triangle whose tip form the wheel-set side bearing 9 and the base of the frame-side bearing 10.
- biaxial chassis 1 has a three-axle chassis 1 according to FIG. 2 a third set of wheels 13, which is arranged in the longitudinal direction X between the first set of wheels 3 and the second set of wheels 4 and connected to the chassis frame 2.
- the outer wheelsets 3 and 4 aligned radially to the bend, what in FIG. 1 and FIG. 2 is indicated by a dash-dot line.
- the hydraulic bushings 12 have low longitudinal stiffness at low driving speeds, while at high driving speeds they have a high longitudinal stiffness on largely straight-line tracks, which leads to a high driving stability.
- This longitudinal rigidity can be adjusted, as explained in more detail below.
- acceleration sensors and an adjusting device are provided, as described below in connection with FIGS FIGS. 6 and 7 shown and described.
- each of the wishbones 8 has a handlebar body 14, via whose horizontally extending connecting wall 15 two smaller handlebar eyes 16 for receiving the elastomer bushings 11 and a larger handlebar eye 17 for receiving the hydraulic bushing 12 are connected to one another.
- the handlebar body 14 may be formed as a casting or as a forged part or as a milled part.
- At the two the larger handlebar eye 17 with the smaller bar eye 16 connecting side edges of the connecting wall 15 optionally vertically projecting connecting webs 18 are integrally formed.
- Each elastomeric bushing 11 has an inner bearing shell 19, an outer bearing shell 20 and an elastomer ring 21 embedded between them.
- Each hydraulic bushing 12 also has an inner bearing shell 25, an outer bearing shell 26 and an embedded between them, annular elastomeric element 27 on.
- the outer bearing shell 26 is seated in the larger handle eye 17, while the inner bearing shell 25 is penetrated vertically by a bearing pin 28.
- the bearing pin 28 has a vertically extending through hole 29, are guided by the fastening means 30 for connecting the wheel set side bearing 9 with the axle 6 coaxially through the hydraulic bushing 12.
- the elastomer element 27 and the outer bearing shell 26 form two segment-shaped cavities, of which the cavity facing the elastomer bushings 11 form an internal fluid chamber 31 and the cavity facing away from the elastomer bushes 11 form an external fluid chamber 32.
- the fluid chambers 31 and 32 are interconnected by an internal fluid passage 33 and filled with a hydraulic fluid.
- the inner and outer fluid chambers 31 and 32 are hydraulically coupled in such a way that hydraulic fluid which flows out of one of the fluid chambers 31 or 32 by external pressure flows into the other fluid chamber 32 or 31.
- the pressurization stirs of executives between the axle bearings 6 of the wheelsets 3 and 4 and the chassis frame 2 ago, which transmit the wishbone 8 and can lead to a fluid exchange between the fluid chambers 31 and 32 in the hydraulic bushings 12. This fluid exchange is actively influenced according to the invention, as further explained below.
- the longitudinal stiffness c Decisive for the longitudinal stiffness c (assuming that no active influence on the fluid flows is taken) of the hydraulic bushes 12 is the frequency f at which transverse accelerations are excited externally by the shaft race of the wheel sets 3 and 4 in the elastomer element 27.
- the hydraulic bushings 12 have a variable, exciting frequency-dependent longitudinal stiffness c, whose course in FIG. 5 is indicated.
- Low frequencies f which occur at low speeds of the rail vehicle, for example, when bow, occur, go with a low longitudinal stiffness C low ; the wheel set side bearings 9 are then soft, so that a radial adjustment of the wheelsets 3 and 4 in the track bend by fluid exchange is possible.
- the fluid chambers 31 and 32 are in the embodiment according to FIG. 5 not internally connected in a hydraulic bush 12, but via external fluid channels 34, which may be designed as a rigid hydraulic line or as flexible hydraulic hoses.
- the arranged on the same chassis side hydraulic bushings 12 are connected here via two external fluid channels 34 such that the outer fluid chamber 32 of the first set of wheels 3 with the inner fluid chamber 31 of the second gear 4 and the inner fluid chamber 31 of the first gear 3 with the outside lying fluid chamber 32 of the second gear 4 are hydraulically coupled.
- the coupling is symmetrical to the longitudinal direction on both sides of the chassis, whereby the radial position of the wheelsets 3 and 4 favors in the curve and the required high longitudinal stiffness c is ensured when starting with high tensile force or braking.
- FIG. 6 shows the chassis 1 according to FIG. 5 with more details.
- acceleration sensors 601 are shown, which are designed to measure a wheelset acceleration.
- each axle box 6 an acceleration sensor 601 is provided.
- the acceleration sensors 601 measure an acceleration in the x and y directions and a rotational acceleration about the z axis. Accordingly, the acceleration sensors 601 output acceleration signals 603. This is indicated symbolically by arrows with the reference numeral 603.
- the acceleration signals 603 are supplied to a regulator 605.
- the regulator means 605, which may be formed, for example, as a PI controller, forms from the thus filtered accelerations and corresponding setpoint specifications a difference signal which provides the control variable for a pressure generating device 607, which includes a not shown hydropulser and a pressure generator, not shown.
- the Hydropulser forms together with a pressure generator a hydraulic pressure signal which is suitable to influence a highly dynamic shaft running the wheelsets 3 and 4 and their position in the track accordingly.
- a suitable switching frequency (which is determined) of the fluid chambers 31 and 32 can thus stabilize the wheelsets 3 and 4 by means of the wishbone 8 and hydraulic bushings 12 by impressing a counterphase of the wave pattern in an advantageous manner with unstable vehicle running frequency pattern.
- one can thus effect an active steering of the wheelsets 3 and 4 in narrow track curves by means of suitable hydraulic interconnection of the fluid chambers 3 and 4 in order to optimize the tracking and minimize wear on the wheel treads.
- Which switching frequency is suitable is determined in particular as a function of the measured Radsatzbeschreibitch.
- the pressure generating device 607 can adjust a hydraulic pressure in the fluid chambers 31 and 32 of the individual hydraulic bushes 12. This in particular as a function of the measured acceleration signals 603.
- the control device 605 comprises a signal filter for the acceleration signals 603, in particular a real-time signal filter.
- the control device 605 comprises a signal computer with a measured value converter, in particular a real-time signal computer with a measured value converter.
- the controller 605 further includes a difference former having a PI controller and a setpoint input for a pulse signal converter.
- the control device 605 comprises in particular a pulse signal converter with a valve control unit for controlling valves, in particular switching valves. These valves are for clarity in FIG. 6 Not shown.
- the pressure generating device 607 further comprises a hydraulic pulser, which acts as an energy converter and generating unit of the required control pulse pattern and the hydraulic pressure for the hydraulic bushings 12 in the wishbones 8.
- a hydraulic pulser acts as an energy converter and generating unit of the required control pulse pattern and the hydraulic pressure for the hydraulic bushings 12 in the wishbones 8.
- a separate Pressure generator and / or a separate accumulator to ensure the required hydraulic pressure levels for active stability control and steering of the wheelsets 3 and 4 provided.
- a pressure monitor with one pressure sensor per coupled fluid chamber 31, 32 is provided. As a result, a diagnosis in case of failure, a leak, is advantageously possible.
- the fluid chambers 31, 32 of the same hydraulic sleeve 12 have no hydraulic connection with each other. Rather, they are as above in connection with the FIG. 5 described coupled together. It thus results in an advantageous manner, the ability to actively control hydraulically the forces and accelerations and turning moments resulting from the Radsatz Installations kit and thus actively affect the naturally occurring wave of the wheelsets 3, 4 in the track actively.
- the fluid chambers 31, 32 of the hydraulic bushes 12 on the wishbones 8 of the wheelsets 3, 4 are each interconnected so that the prevailing hydraulic pressure causes either a stiffening or softening of the hydraulic bearings.
- the regulator means 605 and the pressure generating means 607 constitute an adjusting means for adjusting a hydraulic pressure in the fluid chambers 31, 32.
- FIG. 7 shows the chassis 1 according to FIG. 1 with more details.
- the individual fluid chambers 31, 32 of the same hydraulic bush 12 are only hydraulically coupled with one another.
- the fluid chambers 31, 32 of the hydraulic bushings 12 are not hydraulically coupled with each other.
- channels 701 are provided which connect the fluid chambers 31, 32 of the hydraulic bushings 12 to each other hydraulically.
- an internal fluid channel 33 may be provided.
- a switching valve 703 to be provided in the channels 701 or internal fluid channel 33, which can thus set a flow or a flow resistance between a hydraulic fluid between the two fluid chambers 31, 32.
- the switching valve 703 may be closed so that there is no connection between the fluid chambers 31, 32.
- the switching valve 701 may be open, so that there is a hydraulic connection between the fluid chambers 31, 32.
- These switching valves 703 are controlled by control signals 705.
- These control signals 705 are formed by the controller 605. Analogous to the statements related to FIG. 6 the control device 605 forms these control signals 705 based on the acceleration signals 603.
- the controller 605 includes, for example, a PI controller and forms from the measured and filtered accelerations and corresponding setpoint specifications a difference signal, which is the control variable for a control device for the switching valves 703, not shown here.
- a turning moment damping allows in this embodiment with the switching valves 701 each one the shaft antiphase softening or stiffening of the two wishbones on the wheelset 3, 4 and thus actively damps a highly dynamic shaft running of the wheelsets 3, 4.
- This embodiment thus influenced in an advantageous manner their radial adjustment behavior in the track.
- a suitable switching frequency (which is determined) of the hydraulic fluid chambers 31, 32 can thus effectively dampen the frequency of the shaft running and stabilize the Radsatzlauf in unstable vehicle running.
- Which switching frequency is suitable is determined in particular as a function of the measured Radsatzbeschreibonne.
- Analogous to FIG. 6 can also be provided in a non-illustrated embodiment for pressure monitoring per one pressure sensor per coupled fluid chamber 31, 32.
- the controller 605 includes a signal filter, real-time signal filter, a signal processor with transducer, in particular a real-time signal calculator with transducer.
- the controller 605 further includes a difference former having a PI controller and a setpoint input for a pulse signal converter.
- the control device 605 comprises, in particular, a pulse signal converter and a valve control device for controlling the switching valves 703.
- the embodiment according to FIG. 7 a hydraulic torque converter in the form of the switching valves 703 to the hydraulic bushings 12 in the wishbone 8 for an active stability control of the wheelsets 3, 4th
- the switching valves 703 with the regulator 605 constitute adjusting means for adjusting a hydraulic pressure in the fluid chambers 31, 32.
- the idea according to the invention therefore lies in particular in a simple application of the hitherto proven concept of the wishbone in the chassis and its equipment with hydraulic bushes and their force control by influencing and changing, for example imprint, the hydraulic pressure levels in their fluid chambers for active influencing
- the expression of an active torque converter is provided for the stabilization of the Radsatzlaufes in an advantageous manner.
- the active chassis steering and stability control as well as the active torque converter can be used in single and multi-axle chassis, in running and traction chassis, such as bogies.
- FIG. 8 shows a flowchart of a method for operating a chassis according to the invention.
- a wheel set acceleration per wheel set is measured by means of the acceleration sensors.
- the hydraulic pressure in at least one of the fluid chambers is adjusted as a function of the measured wheelset acceleration.
- FIG. 9 shows a rail vehicle 901, which includes the chassis 1 according to the invention.
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Description
Die Erfindung betrifft ein Fahrwerk für ein Schienenfahrzeug. Die Erfindung betrifft ferner ein Schienenfahrzeug sowie ein Computerprogramm.The invention relates to a chassis for a rail vehicle. The invention further relates to a rail vehicle and a computer program.
Die Gebrauchsmusterschrift
Die Übersetzung
Bei Fahrwerken für Schienenfahrzeuge besteht der grundsätzliche Zielkonflikt zwischen dem dynamischen Laufverhalten bei Bogenfahrt und der Fahrstabilität bei Geradeausfahrt mit hoher Geschwindigkeit. Der Zielkonflikt ist bereits seit langer Zeit bekannt und es gibt dazu in der Geschichte der Eisenbahntechnik die unterschiedlichsten Lösungsansätze. Gerade in der jüngeren Vergangenheit bekommt dieser Zielkonflikt erneut Bedeutung durch eine Verschärfung der Zugangsbedingungen zum Schienennetz durch die Infrastrukturbetreiber in Europa sowie vor der anhaltenden Diskussion um die Einführung verschleißabhängiger Nutzungsgebühren des Schienennetzes.In the case of rail vehicles for rolling stock, the fundamental conflict of objectives exists between the dynamic running behavior during curved travel and the driving stability when driving straight ahead at high speed. The conflict of objectives has been known for a long time and there are many different solutions in the history of railway technology. Especially in the recent past, this conflict of objectives is once again gaining significance due to the widening of access conditions to the rail network by the infrastructure managers in Europe and the continuing discussion about the introduction of wear-related fees for the rail network.
Aus der Offenlegungsschrift
Die der Erfindung zugrunde liegende Aufgabe kann darin gesehen werden, ein verbessertes Fahrwerk für ein Schienenfahrzeug bereitzustellen.The object underlying the invention can be seen to provide an improved chassis for a rail vehicle.
Die der Erfindung zugrunde liegende Aufgabe kann auch darin gesehen werden, ein entsprechendes Verfahren zum Betreiben eines Fahrwerks für ein Schienenfahrzeug bereitzustellen.The object underlying the invention can also be seen to provide a corresponding method for operating a chassis for a rail vehicle.
Die der Erfindung zugrunde liegende Aufgabe kann darin gesehen werden, ein entsprechendes Schienenfahrzeug bereitzustellen.The object underlying the invention can be seen to provide a corresponding rail vehicle.
Die der Erfindung zugrunde liegende Aufgabe kann auch darin gesehen werden, ein entsprechendes Computerprogramm anzugeben.The object underlying the invention can also be seen to provide a corresponding computer program.
Diese Aufgaben werden mittels des jeweiligen Gegenstands der unabhängigen Ansprüche gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand von jeweils abhängigen Unteransprüchen.These objects are achieved by means of the subject matter of the independent claims. Advantageous embodiments of the invention are the subject of each dependent subclaims.
Nach einem Aspekt wird ein Fahrwerk für ein Schienenfahrzeug bereitgestellt, umfassend:
- einen mindestens auf einem ersten Radsatz und einem zweiten Radsatz abgestützten Fahrwerksrahmen,
- je Radsatz auf beiden Fahrwerksseiten je einen Dreieckslenker zur horizontalen Achsführung des Radsatzes, wobei
- jeder Dreieckslenker mit einem von zwei Achslagern eines Radsatzes durch ein radsatzseitiges Lager und mit dem Fahrwerksrahmen durch zwei rahmenseitige Lager gelenkig verbunden ist, wobei
- je Dreieckslenker zumindest einer der Lager eine Hydraulikbuchse mit veränderlicher Längssteifigkeit aufweist, wobei
- die Hydraulikbuchse mindestens eine mit einem Hydraulikfluid befüllbare Fluidkammer aufweist, so dass sich in der Fluidkammer ein hydraulischer Druck bilden kann, über welchen die Längssteifigkeit einstellbar ist,
- je Achslager einen Beschleunigungssensor zum Messen einer Radsatzbeschleunigung und
- eine Einstelleinrichtung zum Einstellen des hydraulischen Drucks in zumindest einer der Fluidkammern in Abhängigkeit der gemessenen Radsatzbeschleunigung.
- a chassis frame supported at least on a first set of wheels and a second set of wheels,
- each wheelset on both sides of the chassis each have a wishbone to the horizontal axle guide of the wheelset, wherein
- each wishbone is pivotally connected to one of two journal bearings of a wheelset by a wheel set side bearing and to the landing gear frame by two frame side bearings, wherein
- each wishbone at least one of the bearing has a hydraulic bushing with variable longitudinal stiffness, wherein
- the hydraulic bushing has at least one fluid chamber that can be filled with a hydraulic fluid, so that a hydraulic pressure can form in the fluid chamber, via which the longitudinal rigidity is adjustable,
- each axle bearing an acceleration sensor for measuring a Radsatzbeschleunigung and
- an adjusting device for adjusting the hydraulic pressure in at least one of the fluid chambers as a function of the measured wheelset acceleration.
Gemäß einem weiteren Aspekt wird ein Verfahren zum Betreiben des erfindungsgemäßen Fahrwerks für ein Schienenfahrzeug bereitgestellt, umfassend die folgenden Schritte:
- Messen einer Radsatzbeschleunigung je Radsatz mittels der Beschleunigungssensoren,
- Einstellen des hydraulischen Drucks in zumindest einer der Fluidkammern in Abhängigkeit der gemessenen Radsatzbeschleunigung.
- Measuring a wheelset acceleration per wheel set by means of the acceleration sensors,
- Adjusting the hydraulic pressure in at least one of the fluid chambers as a function of the measured Radsatzbeschleunigung.
Nach noch einem Aspekt wird ein Schienenfahrzeug bereitgestellt, welches das erfindungsgemäße Fahrwerk umfasst.According to yet another aspect, a rail vehicle is provided which comprises the chassis according to the invention.
Nach noch einem Aspekt wird ein Computerprogramm angegeben, welches Programmcode zur Durchführung des erfindungsgemäßen Verfahrens umfasst, wenn das Computerprogramm auf einem Computer ausgeführt wird.According to yet another aspect, a computer program is specified which comprises program code for carrying out the method according to the invention when the computer program is executed on a computer.
Die Erfindung umfasst also insbesondere den Gedanken, eine Längssteifigkeit einer Hydraulikbuchse eines Lagers eines Dreieckslenkers einzustellen, indem ein bestimmter hydraulischer Druck in der Hydraulikbuchse, genauer in der Fluidkammer, eingestellt wird. Über das aktive Einstellen der Längssteifigkeit kann somit in vorteilhafter Weise der Wellenlauf aktiv beeinflusst werden. Dieser ist mittelbar über eine Messung der Radsatzbeschleunigungen erfassbar. Da das Einstellen auf Basis oder in Abhängigkeit der Radsatzbeschleunigungen erfolgt, kann der Wellenlauf derart beeinflusst werden, dass eine optimale Spurführung bei minimalem Verschleiß bewirkt werden kann.In particular, the invention therefore encompasses the idea of setting a longitudinal rigidity of a hydraulic bushing of a bearing of a wishbone by setting a specific hydraulic pressure in the hydraulic bush, more precisely in the fluid chamber. The active adjustment of the longitudinal rigidity can thus advantageously actively influence the shaft travel. This can be detected indirectly via a measurement of the wheelset accelerations. Since the adjustment is based on or depending on the wheelset accelerations, the shaft run can be influenced in such a way that optimum tracking can be effected with minimum wear.
Der Wellenlauf der Radsätze resultiert aus dem Fahrzeuglauf im Gleis und entsteht durch die vorhandene Berührgeometrie zwischen Radprofil und Schienenprofil, welches vereinfacht einem Konus, der mit seiner Mantelfläche auf einer Ebene abrollt, entspricht. Der Konus wird sich seinem Winkel entsprechend dabei stets auf einer Kreisbahn abrollen. Der Radsatz entspricht vereinfacht dabei zwei entgegengesetzt angeordneten Konen, die mit einer Achse starr verbunden sind. Dadurch hat der Radsatz beim Abrollen seiner beiden starr durch die Radsatzwelle verbundenen Räder stets das vorteilhafte Bestreben, sich bogenradial im Gleis (auch in der Geraden) einzustellen zu wollen. Durch diese Radialstellung rollen die beiden Räder auf jeweils unterschiedlichen Rollradien im Gleis, sodass ein seiner Winkeleinstellung gegensinniges, sogenanntes Wendemoment des Radsatzes erzeugt wird, welches eine Radialeinstellung zur entgegengesetzten Richtung zur Folge hat. Die reale Berührgeometrie zwischen Rad und Schiene ist komplexer und hat ein nichtlineares Verhalten. Man spricht hier von der sogenannten äquivalenten Konizität. Dennoch ergibt sich auch hier ein Wellenlauf des Radsatzes aus den Rollradiendifferenzen, der jedoch keiner reinen Sinusfunktion mehr entspricht. Um die erwünschte Radialstellung des Radsatzes dennoch zu ermöglichen, ist er über die Achsführung (Dreieckslenker) so geführt, dass eine laterale Verschiebung und eine Winkeleinstellung und Wendebewegung um seine Hochachse möglich ist. Die Wellenlauffrequenz ist dabei abhängig von der Fahrzeuggeschwindigkeit und der Ausbildung der Steifigkeit der Achsführung längs und quer zur Fahrzeuglängsachse. Eine weiche Achsführung begünstigt die Wendebewegung und somit das Radialstellungsvermögen der Radsätze, also das positive Bogenlaufverhalten in Gleisbögen mit relativ langsamer Fahrgeschwindigkeit, führt aber bei Geradeausfahrt mit hoher Fahrzeuggeschwindigkeit zu instabilem Wellenlauf.The shaft running of the wheelsets results from the vehicle run in the track and is caused by the existing contact geometry between the wheel profile and rail profile, which simplifies a cone that rolls with its lateral surface on a plane corresponds. The cone will always roll on a circular path according to its angle. Simultaneously, the wheel set corresponds to two oppositely arranged cones, which are rigidly connected to an axle. Thereby the wheelset when rolling its two wheels rigidly connected by the wheel set shaft always the advantageous endeavor to want to adjust radiolucency in the track (even in the straight line). Through this radial position, the two wheels roll on each different rolling radii in the track, so that one of its angular adjustment opposite, so-called turning moment of the wheelset is generated, which has a radial adjustment to the opposite direction result. The real contact geometry between wheel and rail is more complex and has a nonlinear behavior. This is called the equivalent conicity. Nevertheless, here also results in a wave of the wheelset from the rolling wheel differences, but no longer corresponds to a pure sine function. In order to still allow the desired radial position of the wheelset, it is guided over the axle guide (wishbone) so that a lateral displacement and an angular adjustment and turning movement about its vertical axis is possible. The shaft running frequency is dependent on the vehicle speed and the formation of the rigidity of the axle guide along and transverse to the vehicle longitudinal axis. A soft axle guide favors the turning movement and thus the Radialstellungsvermögen the wheelsets, so the positive sheet travel behavior in track curves with relatively slow driving speed, but leads to straight-line driving at high vehicle speed to unstable wave.
Bei steifer Achsführung verhält sich der Radsatz in der Geraden stabil, erschwert jedoch seine Radialeinstellung im Gleisbogen.When the axle guide is stiff, the wheelset behaves stably in the straight line, but makes its radial adjustment in the curved track more difficult.
Die so bei Fahrzeuglauf im Gleis erzeugten Wendemomente des Radsatzes resultieren zusammen mit den Zug- beziehungsweise Bremskräften aus Antrieb und Bremse im Fahrzeug in entsprechende Kräfte und Beschleunigungen, welche längs, quer und als Wendemoment um die Hochachse des Radsatzes wirken.The turning moments of the wheel set thus generated during vehicle running in the track result together with the tensile or braking forces from the drive and brake in the vehicle in corresponding forces and accelerations, which act longitudinally, transversely and as a turning moment about the vertical axis of the wheelset.
Erfindungsgemäß wird also dieser Wellenlauf aktiv beeinflusst, in dem die Längssteifigkeit der Hydraulikbuchse mittels Einstellen des hydraulischen Drucks in der Fluidkammer verändert wird. So kann ein ungünstiger Wellenlauf kompensiert werden, sodass ein Verschleiß minimiert werden kann und sodass eine stabile Geradeausfahrt bewirkt werden kann.According to the invention, therefore, this wave is actively influenced, in which the longitudinal stiffness of the hydraulic bushing means Adjusting the hydraulic pressure in the fluid chamber is changed. In this way, an unfavorable wave run can be compensated so that wear can be minimized and a stable straight-ahead travel can be achieved.
Nach einer Ausführungsform ist vorgesehen, dass die Einstelleinrichtung ausgebildet ist, einen vorbestimmten zeitlichen Verlauf des hydraulischen Drucks in Abhängigkeit der gemessenen Radsatzbeschleunigung einzustellen, um dem Radsatz einen entsprechenden zeitlichen Verlauf eines Wendemoments aufzuprägen.According to one embodiment, it is provided that the setting device is designed to set a predetermined time profile of the hydraulic pressure as a function of the measured Radsatzbeschleunigung in order to impart to the wheelset a corresponding time profile of a turning moment.
Gemäß einer weiteren Ausführungsform ist vorgesehen, dass die Einstelleinrichtung ausgebildet ist, über das Einstellen des hydraulischen Drucks in der Fluidkammer dem dieser Fluidkammer entsprechenden Radsatz aktiv ein Wendemoment aufzuprägen. Dadurch wird insbesondere der technische Vorteil bewirkt, dass eine aktive Lenkung über das Einstellen des hydraulischen Drucks ermöglicht ist. Das Wendemoment kann in vorteilhafter Weise einen instabilen Fahrverlauf kompensieren.According to a further embodiment, it is provided that the adjusting device is designed to actively impart a turning moment to the wheel set corresponding to this fluid chamber by adjusting the hydraulic pressure in the fluid chamber. As a result, in particular the technical advantage is effected that an active steering is made possible by adjusting the hydraulic pressure. The turning moment can advantageously compensate for an unstable driving course.
In einer anderen Ausführungsform ist vorgesehen, dass das Lager mit der Fluidkammer das radsatzseitige Lager ist.In another embodiment it is provided that the bearing with the fluid chamber is the wheel set side bearing.
Gemäß einer weiteren Ausführungsform ist vorgesehen, dass die Einstelleinrichtung einen mit der Fluidkammer verbindbaren Druckspeicher aufweist. Dadurch wird insbesondere der technische Vorteil bewirkt, dass ein hydraulischer Druck, welcher momentan nicht benötigt wird, in den Druckspeicher zwischengespeichert werden kann, sodass dieser für einen späteren Zeitpunkt wiederverwendet werden kann, um dann den hydraulischen Druck in der Fluidkammer einzustellen. Der Druckspeicher ist insbesondere ausgebildet, das Hydraulikfluid aufzunehmen und wieder abzugeben. Das heißt, dass der Druckspeicher insbesondere das Hydraulikfluid aufnimmt und wieder abgibt. Dies wird insbesondere mittels der Einstelleinrichtung gesteuert. Zum Beispiel ist ein Ventil, zum Beispiel ein Schaltventil, zwischen der Fluidkammer und dem Druckspeicher vorgesehen. Somit ist in vorteilhafter Weise bewirkt, dass der Druckspeicher von der Fluidkammer angekoppelt und wieder abgekoppelt werden kann.According to a further embodiment it is provided that the adjusting device has a pressure accumulator connectable to the fluid chamber. As a result, in particular, the technical advantage is achieved that a hydraulic pressure, which is currently not needed, can be cached in the pressure accumulator, so that it can be reused for a later date, and then adjust the hydraulic pressure in the fluid chamber. The pressure accumulator is in particular designed to receive and dispense the hydraulic fluid. This means that the pressure accumulator in particular receives and releases the hydraulic fluid. This is controlled in particular by means of the adjusting device. For example, a valve, for example a switching valve, is between the fluid chamber and the pressure accumulator intended. Thus, it is advantageously effected that the pressure accumulator can be coupled from the fluid chamber and decoupled again.
Nach noch einer Ausführungsform ist vorgesehen, dass die Einstelleinrichtung eine mit der Fluidkammer verbindbare Druckerzeugungseinrichtung aufweist. Dadurch wird insbesondere der technische Vorteil bewirkt, dass, falls ein zusätzlicher hydraulischer Druck in der Fluidkammer benötigt wird, dieser mittels der Druckerzeugungseinrichtung erzeugt werden kann. Somit kann ein bestimmtes Druckniveau sichergestellt werden. Insbesondere wird dadurch der technische Vorteil bewirkt, dass aktiv ein Druck in der Fluidkammer aufgebaut werden kann. Dies insbesondere entgegen einer Fluidströmung, die sich insbesondere zwangsläufig aus der Bewegung des Schienenfahrzeugs ergibt.According to another embodiment, it is provided that the adjusting device has a pressure generating device that can be connected to the fluid chamber. As a result, in particular, the technical advantage is achieved that, if an additional hydraulic pressure in the fluid chamber is needed, this can be generated by means of the pressure generating device. Thus, a certain pressure level can be ensured. In particular, this causes the technical advantage that actively a pressure in the fluid chamber can be established. This in particular counteracts a fluid flow, which in particular inevitably results from the movement of the rail vehicle.
Denn aufgrund des Wellenlaufs resultieren bestimmte Radsatzführungskräfte, die Hydraulikfluidströmungen erzwingen. Das Hydraulikfluid wird also abhängig von den Radsatzführungskräften aus den Fluidkammern strömen respektive in diese hineinströmen. Dieses Ein- und Ausströmen kann nun aktiv gesteuert oder beeinflusst werden. Dies ist insbesondere ein wesentlicher erfindungsgemäßer Gedanke.Because of the wave run certain Radsatzführungskräfte that force hydraulic fluid flows. The hydraulic fluid will thus flow depending on the Radsatzführungskräften from the fluid chambers, respectively, in this flow. This inflow and outflow can now be actively controlled or influenced. This is in particular an essential idea according to the invention.
Gemäß einer weiteren Ausführungsform weisen die rahmenseitigen Lager Elastomerbuchsen mit konstanter Längs- und Quersteifigkeit und die radsatzseitigen Lager Hydraulikbuchsen mit konstanter Quersteifigkeit und veränderlicher Längssteifigkeit auf.According to a further embodiment, the frame-side bearing elastomer bushing with constant longitudinal and transverse stiffness and the wheelset side bearing hydraulic bushings with constant transverse stiffness and variable longitudinal stiffness.
Nach einer Ausführungsform sind die Lager jedes Dreieckslenkers auf den Ecken jeweils eines horizontal ausgerichteten, gleichschenkligen Dreiecks angeordnet, dessen Spitze das radsatzseitige Lager und dessen Basis die rahmenseitigen Lager bilden. Durch die symmetrisch zur Längsrichtung verteilte Anordnung der Lager auf den Ecken eines gleichschenkligen Dreiecks erreicht man eine besonders hohe Quersteifigkeit des Dreieckslenkers, die beispielsweise durch die Eigenschaften des Elastomers in den Lagern bestimmt ist.According to one embodiment, the bearings of each wishbone are arranged on the corners of each of a horizontally oriented, isosceles triangle whose tip form the wheel set side bearing and the base of the frame side bearing. Due to the arrangement of the bearings distributed symmetrically to the longitudinal direction on the corners of an isosceles triangle, a particularly high transverse rigidity of the Wishbone, for example, determined by the properties of the elastomer in the bearings.
In einer anderen Ausführungsform ist vorgesehen, dass jede Hydraulikbuchse eine in Längsrichtung außen liegende Fluidkammer und eine in Längsrichtung innen liegende Fluidkammer aufweist, die in Längsrichtung einander gegenüberliegend angeordnet und mit dem Hydraulikfluid befüllbar sind, wobei an jeder Fluidkammer ein Fluidkanal zum Ein- respektive Ausströmen von Hydraulikfluid in die respektive aus der Fluidkammer angeschlossen ist, wobei die Einstelleinrichtung mit den Fluidkanälen hydraulisch gekoppelt und ausgebildet ist, einen Ein- respektive Ausstrom von Hydraulikfluid einzustellen, so dass der hydraulische Druck in den Fluidkammern mittels Ausströmen respektive Einströmen von Hydraulikfluid eingestellt werden kann.In another embodiment, it is provided that each hydraulic bushing has a fluid chamber lying in the longitudinal direction and a fluid chamber located in the longitudinal direction, which are arranged opposite each other in the longitudinal direction and filled with the hydraulic fluid, wherein at each fluid chamber, a fluid channel for on or discharge of Hydraulic fluid is connected in the respectively from the fluid chamber, wherein the adjusting device is hydraulically coupled to the fluid channels and adapted to set a one or flow of hydraulic fluid, so that the hydraulic pressure in the fluid chambers can be adjusted by means of outflow or inflow of hydraulic fluid.
Wie bereits vorstehend ausgeführt, resultieren aufgrund des Wellenlaufs bestimmte Radsatzführungskräfte, die Hydraulikfluidströmungen erzwingen. Es ist nun erfindungsgemäß vorgesehen, dass dieses Ein- und Ausströmen aktiv gesteuert und/oder beeinflusst wird. Zum Beispiel sind Ventile in den Fluidkanälen vorgesehen, die gesteuert werden können. Insbesondere können diese Ventile geöffnet und/oder geschlossen und/oder derart gesteuert werden, dass ein Strömungsquerschnitt in dem Fluidkanal geändert, also beispielsweise vergrößert oder verkleinert, wird. Somit ist in vorteilhafter Weise ein Einstellen einer Längssteifigkeit in vorteilhafter Weise bewirkt. Dadurch kann also in vorteilhafter Weise dem Radsatz ein bestimmtes Wendemoment aufgeprägt werden. Dieses kann beispielsweise einen Wellenlauf derart kompensieren, dass ein Verschleiß und/oder eine unruhige Fahrt minimiert werden.As already stated above, due to the wave run certain Radsatzführungskräfte that force hydraulic fluid flows. It is now provided according to the invention that this inflow and outflow is actively controlled and / or influenced. For example, valves are provided in the fluid channels that can be controlled. In particular, these valves can be opened and / or closed and / or controlled such that a flow cross section in the fluid channel changed, that is, for example, increased or decreased, is. Thus, an adjustment of a longitudinal rigidity is advantageously effected in an advantageous manner. As a result, a specific turning moment can advantageously be impressed on the wheel set. This can compensate, for example, a wave so that wear and / or a restless ride can be minimized.
Innen liegend und außen liegend sind hier in Bezug auf die Längsrichtung, welche als parallel zur Fahrt- oder Schienenrichtung verlaufend definiert ist, bezeichnet. In Längsrichtung sind der erste und zweite Radsatz hintereinander - anders ausgedrückt, beiderseits einer Fahrwerksmitte - angeordnet, wobei eine innen liegende Fluidkammer der Fahrwerksmitte zugewandt und eine außen liegende Fluidkammer der Fahrwerksmitte abgewandt angeordnet sind.Lying on the inside and outside are here in relation to the longitudinal direction, which is defined as running parallel to the travel or rail direction designated. In the longitudinal direction of the first and second wheels are behind each other - different expressed, on both sides of a chassis middle - arranged, wherein an inner fluid chamber facing the center of the chassis and an outer fluid chamber of the center of the chassis are arranged facing away.
Gemäß einer weiteren Ausführungsform ist vorgesehen, dass auf derselben Fahrwerksseite angeordnete Hydraulikbuchsen über externe Fluidkanäle derart verbunden sind, dass die außen liegende Fluidkammer des ersten Radsatzes mit der innen liegenden Fluidkammer des zweiten Radsatzes und die innen liegende Fluidkammer des ersten Radsatzes mit der außen liegenden Fluidkammer des zweiten Radsatzes hydraulisch gekoppelt sind, wobei die Einstelleinrichtung mit den externen Fluidkanälen hydraulisch gekoppelt ist.According to a further embodiment it is provided that arranged on the same suspension side hydraulic bushes are connected via external fluid channels such that the outer fluid chamber of the first set of wheels with the inner fluid chamber of the second set and the inner fluid chamber of the first set of wheels with the outer fluid chamber second set of wheels are hydraulically coupled, wherein the adjusting device is hydraulically coupled to the external fluid channels.
Nach noch einer Ausführungsform ist vorgesehen, dass jede der Hydraulikbuchsen jeweils einen internen Fluidkanal aufweist, über welchen die außen liegende Fluidkammer und die innen liegende Fluidkammer derselben Hydraulikbuchse hydraulisch gekoppelt sind, wobei die Einstelleinrichtung schaltbare Ventile umfasst, wobei jedem internen Fluidkanal ein schaltbares Ventil zugeordnet ist, mittels welchen ein Durchfluss von Hydraulikfluid durch den Fluidkanal einstellbar ist.According to yet another embodiment, it is provided that each of the hydraulic bushes in each case has an internal fluid channel, via which the outer fluid chamber and the inner fluid chamber of the same hydraulic bushing are hydraulically coupled, wherein the adjusting device comprises switchable valves, wherein each internal fluid channel is associated with a switchable valve , by means of which a flow of hydraulic fluid through the fluid channel is adjustable.
Intern im Sinne der vorliegenden Erfindung bedeutet insbesondere, dass ein interner Fluidkanal innerhalb der Hydraulikbuchse verläuft. Intern im Sinne der vorliegenden Erfindung heißt aber auch, dass ein solcher interner Fluidkanal zwar außerhalb der Hydraulikbuchse verlaufen kann, aber ausschließlich die innen liegende Fluidkammer mit der außen liegenden Fluidkammer derselben Hydraulikbuchse verbindet oder hydraulisch koppelt.Internal within the meaning of the present invention means in particular that an internal fluid channel runs within the hydraulic bushing. Internal within the meaning of the present invention also means that such an internal fluid channel can indeed run outside the hydraulic bushing, but only connects or hydraulically couples the internal fluid chamber to the outer fluid chamber of the same hydraulic bushing.
Die vorstehend genannten Ausführungsformen im Zusammenhang mit dem internen Fluidkanal und dem externen Fluidkanal können gemäß einer anderen Ausführungsform als alternative Ausführungsformen vorgesehen sein. Das heißt, dass insbesondere eine hydraulische Entkopplung zwischen den Fluidkammern derselben Hydraulikbuchse und eine ausschließlich hydraulische Kopplung der Fluidkammern von mehreren Hydraulikbuchsen vorgesehen ist, wie sie im Zusammenhang mit den externen Fluidkanälen beschrieben ist. Alternativ zu dieser Ausführungsform ist eine hydraulische Entkopplung der Fluidkammern einer Hydraulikbuchse mit Fluidkammern einer weiteren Hydraulikbuchse und eine ausschließliche Kopplung der Fluidkammern derselben Hydraulikbuchse, wie sie im Zusammenhang mit dem internen Fluidkanal beschrieben ist, vorgesehen. In einer weiteren alternativen Ausführungsform sind die einzelnen Fluidkammern der Hydraulikbuchsen wie vorstehend im Zusammenhang mit den externen und internen Fluidkanälen miteinander gekoppelt, wobei aber in den Fluidkanälen, also sowohl in den externen und/oder internen Fluidkanälen, Ventile, zum Beispiel Schaltventile, derart vorgesehen sind, um die jeweiligen Kopplungszustände zu bewirken, indem diese Ventile entsprechend geschlossen oder geöffnet werden respektive sind. Somit kann in vorteilhafter Weise je nach gewünschter Anforderung ein bestimmter Kopplungszustand (nur die Fluidkammern derselben Hydraulikbuchse sind hydraulisch gekoppelt oder die Fluidkammern von mehreren Hydraulikbuchsen sind miteinander gekoppelt, wie vorstehend im Zusammenhang mit den externen Fluidkanälen ausgeführt) geschaltet werden.The above-mentioned embodiments in connection with the internal fluid channel and the external fluid channel may, according to another embodiment, be provided as alternative embodiments. This means that in particular a hydraulic decoupling between the fluid chambers thereof Hydraulic bushing and an exclusively hydraulic coupling of the fluid chambers is provided by a plurality of hydraulic bushings, as described in connection with the external fluid channels. As an alternative to this embodiment, a hydraulic decoupling of the fluid chambers of a hydraulic bush with fluid chambers of another hydraulic bushing and an exclusive coupling of the fluid chambers of the same hydraulic bush, as described in connection with the internal fluid channel, is provided. In a further alternative embodiment, the individual fluid chambers of the hydraulic bushes are coupled to each other as above in connection with the external and internal fluid channels, but in the fluid channels, ie both in the external and / or internal fluid channels, valves, for example switching valves, are provided to effect the respective coupling states by correspondingly closing or opening these valves. Thus, depending on the desired requirement, a specific coupling state (only the fluid chambers of the same hydraulic sleeve are hydraulically coupled or the fluid chambers of a plurality of hydraulic sockets are coupled to one another, as described above in connection with the external fluid channels) can advantageously be switched.
Gemäß einer weiteren Ausführungsform ist vorgesehen, dass ein Drucksensor zum Messen eines hydraulischen Drucks in der Fluidkammer vorgesehen ist. Dadurch wird insbesondere der technische Vorteil bewirkt, dass ein Druckabfall erkannt werden kann. Somit können in vorteilhafter Weise geeignete Maßnahmen, zum Beispiel eine Warnung, ergriffen werden.According to a further embodiment it is provided that a pressure sensor is provided for measuring a hydraulic pressure in the fluid chamber. As a result, in particular the technical advantage is effected that a pressure drop can be detected. Thus, suitable measures, for example a warning, can be taken in an advantageous manner.
In einer bevorzugten Ausführungsform des erfindungsgemäßen Fahrwerks ist jeweils über einen Fluidkanal gekoppelten Fluidkammern ein Drucksensor zugeordnet, der bei einem Abfall des im Hydraulikfluid herrschenden Druckes unter einen vorgebbaren Schwellenwert anspricht, wobei die Drucksensoren einzeln und/oder seriell mit einer Drucküberwachungseinrichtung verbunden sind, und wobei die Drucküberwachungseinrichtung dazu ausgebildet ist, ein Warnsignal an ein Zentralsteuergerät des Schienenfahrzeuges zu übermitteln, wenn einzelne und/oder alle Drucksensoren ansprechen. Hierdurch ist eine Diagnose im Versagensfall des Hydrauliksystems möglich. Die Drucksensoren messen den in gekoppelten Fluidkammern herrschenden Druck, wobei ein Schalter geschlossen wird, sobald der Druck unter einen Schwellenwert fällt. Bei einzelner Verbindung der Drucksensoren mit der Drucküberwachungseinrichtung kann dort für jede Hydraulikbuchse separat festgestellt werden, ob ein kritischer Druckabfall vorliegt. Bei serieller Verbindung der Drucksensoren mit der Drucküberwachungseinrichtung kann dort festgestellt werden, ob in den Hydraulikbuchsen insgesamt ein kritischer Druckabfall vorliegt. Je nach Feststellung kann an ein Zentralsteuergerät des Schienenfahrzeugs ein Warnsignal über den kritischen Druckabfall ausgegeben werden. Hierdurch kann die Betriebssicherheit des Schienenfahrzeugs sichergestellt werden.In a preferred embodiment of the chassis according to the invention, in each case via a fluid channel coupled fluid chambers associated with a pressure sensor which responds to a drop in the pressure prevailing in the hydraulic fluid pressure below a predetermined threshold, the pressure sensors are individually and / or serially connected to a pressure monitoring device, and wherein the pressure monitoring device is designed to transmit a warning signal to a central control unit of the rail vehicle, if individual and / or all pressure sensors respond. As a result, a diagnosis in case of failure of the hydraulic system is possible. The pressure sensors measure the pressure prevailing in coupled fluid chambers, and a switch is closed when the pressure falls below a threshold. In individual connection of the pressure sensors with the pressure monitoring device can be determined separately there for each hydraulic jack, whether there is a critical pressure drop. In the case of a serial connection of the pressure sensors to the pressure monitoring device, it can be ascertained whether there is a total of a critical pressure drop in the hydraulic sockets. Depending on the determination, a warning signal about the critical pressure drop can be output to a central control unit of the rail vehicle. As a result, the reliability of the rail vehicle can be ensured.
In einer anderen vorteilhaften Ausführungsform des erfindungsgemäßen Fahrwerks ist zwischen dem ersten Radsatz und dem zweiten Radsatz ein dritter Radsatz angeordnet. Die bislang für zweiachsige Fahrwerke beschriebene Erfindung ist auch für dreiachsige Fahrwerke anwendbar, wo zwischen dem ersten und dem zweiten Radsatz als äußere Radsätze noch ein dritter, innerer Radsatz angeordnet ist. Indem die Radialstellung der äußeren Radsätze durch erfindungsgemäße Dreieckslenker bewerkstelligt wird, nimmt der dritte, innere Radsatz ohnehin eine Radialstellung ein.In another advantageous embodiment of the chassis according to the invention, a third set of wheels is arranged between the first set of wheels and the second set of wheels. The invention so far described for biaxial chassis is also applicable to three-axle chassis, where between the first and second wheelset as the outer wheel sets still a third, inner wheel is arranged. By the radial position of the outer wheelsets accomplished by triangular link according to the invention, takes the third, inner wheel already a radial position.
Nach einer Ausführungsform ist ein Fluidkanal als starre Leitung oder als flexibler Schlauch gebildet. Bei mehreren Fluidkanälen sind die Fluidkanäle insbesondere gleich oder beispielsweise unterschiedlich gebildet.According to one embodiment, a fluid channel is formed as a rigid conduit or as a flexible hose. In the case of a plurality of fluid channels, the fluid channels are in particular the same or, for example, differently formed.
Nach einer Ausführungsform ist das Schienenfahrzeug eine Lokomotive, ein Triebfahrzeug, eine Straßenbahn, eine U-Bahn oder eine S-Bahn.According to one embodiment, the rail vehicle is a locomotive, a locomotive, a tram, a subway or a rapid-transit railway.
Ausführungsformen im Zusammenhang mit dem Fahrwerk gelten analog für Ausführungsformen hinsichtlich des Verfahrens und umgekehrt. Das heißt, dass Merkmale und/oder Vorteile, wie sie im Zusammenhang mit dem Fahrwerk beschrieben werden, analog für das Verfahren und umgekehrt gelten.Embodiments in connection with the chassis apply analogously to embodiments with regard to the method and vice versa. This means that features and / or advantages, as described in connection with the chassis, apply analogously to the method and vice versa.
Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung der Ausführungsbeispiele, die im Zusammenhang mit der Zeichnung näher erläutert werden, wobei
- FIG 1
- ein zweiachsiges Ausführungsbeispiel des erfindungsgemäßen Fahrwerks in Draufsicht,
- FIG 2
- ein dreiachsiges Ausführungsbeispiel des erfindungsgemäßen Fahrwerks in Draufsicht,
- FIG 3
- eine teilweise geschnittene Seitenansicht eines Dreieckslenkers,
- FIG 4
- eine Draufsicht auf den Dreieckslenker nach
FIG 3 , - FIG 5
- ein weiteres zweiachsiges Ausführungsbeispiel des erfindungsgemäßen Fahrwerks in Draufsicht,
- FIG 6
- das Fahrwerk gemäß
FIG 5 mit weiteren Details, - FIG 7
- das Fahrwerk gemäß
FIG 1 mit weiteren Details, - FIG 8
- ein Ablaufdiagramm eines Verfahrens zum Betreiben eines Fahrwerks und
- FIG 9
- ein Schienenfahrzeug
- FIG. 1
- a biaxial embodiment of the chassis according to the invention in plan view,
- FIG. 2
- a three-axle embodiment of the chassis according to the invention in plan view,
- FIG. 3
- a partially sectioned side view of a wishbone,
- FIG. 4
- a top view of the wishbone after
FIG. 3 . - FIG. 5
- another biaxial embodiment of the chassis according to the invention in plan view,
- FIG. 6
- the chassis according to
FIG. 5 with more details, - FIG. 7
- the chassis according to
FIG. 1 with more details, - FIG. 8
- a flowchart of a method for operating a chassis and
- FIG. 9
- a rail vehicle
Im Folgenden können für gleiche Merkmale gleiche Bezugszeichen verwendet werden. Des Weiteren kann vorgesehen sein, dass der Übersicht halber nicht in sämtlichen Zeichnungen sämtliche Bezugszeichen für die einzelnen Merkmale eingezeichnet sind.Hereinafter, like reference numerals may be used for like features. Furthermore, it can be provided that, for the sake of clarity, not all reference symbols for the individual features are shown in all drawings.
Ein erfindungsgemäßes Fahrwerk 1, auf das sich um eine vertikale Achse drehbar ein nicht dargestellter Wagenkasten eines Schienenfahrzeugs, beispielsweise einer Lokomotive, federnd abstützt, weist gemäß
Gemäß
Entscheidend für die Längssteifigkeit c (unter der Voraussetzung, dass kein aktiver Einfluss auf die Fluidströmungen genommen wird) der Hydraulikbuchsen 12 ist dabei die Frequenz f, mit der im Elastomerelement 27 Querbeschleunigungen von außen durch den Wellenlauf der Radsätze 3 und 4 erregt werden. Neben einer hohen Quersteifigkeit weisen die Hydraulikbuchsen 12 eine veränderliche, erregerfrequenzabhängige Längssteifigkeit c auf, deren Verlauf in
Die Fluidkammern 31 und 32 sind in der Ausführung gemäß
In den vorstehend gemachten Ausführungen wurde davon ausgegangen, dass das Fluid lediglich aufgrund der Radsatzführungskräfte in respektive aus den Fluidkammern strömt. Erfindungsgemäß ist aber vorgesehen, dass aktiv Einfluss auf das Strömungsverhalten des Hydraulikfluids genommen wird. Dies wird im Folgenden näher ausgeführt werden.In the statements made above, it was assumed that the fluid only flows into the fluid chambers due to the wheelset guiding forces. According to the invention, however, it is provided that an active influence on the flow behavior of the hydraulic fluid is taken. This will be explained in more detail below.
So sind in
Die Beschleunigungssignale 603 werden einer Reglereinrichtung 605 zugeführt. Diese filtert die Beschleunigungssignale 603, insbesondere in Echtzeit, in Abhängigkeit von den Steifigkeitsfunktionen der Dreieckslenker 8, den Hydraulikbuchsen 12 und den einzelnen Leitungen der Hydraulikanlage, also insbesondere der externen Kanäle 34, wobei diese Steifigkeitsfunktionen in der Reglereinrichtung 605 als Richtgröße hinterlegt sind, so dass die gefilterten Beschleunigungssignale als Basis für eine Regelung der Längssteifigkeit verwendet werden können. Die Reglereinrichtung 605, die beispielsweise als eine PI-Reglereinrichtung ausgebildet sein kann, bildet aus den so gefilterten Beschleunigungen und entsprechenden Sollwertvorgaben ein Differenzsignal, das die Regelgröße für eine Druckerzeugungseinrichtung 607, die einen nicht gezeigten Hydropulser und einen nicht gezeigten Druckerzeuger umfasst, bereitstellt. Der Hydropulser formt zusammen mit einem Druckerzeuger ein hydraulisches Drucksignal, welches geeignet ist, einen hochdynamischen Wellenlauf der Radsätze 3 und 4 und ihre Stellung im Gleis entsprechend zu beeinflussen. Bei geeigneter Schaltfrequenz (, die ermittelt wird) der Fluidkammern 31 und 32 kann man damit in vorteilhafter Weise bei instabilem Fahrzeuglauf die Radsätze 3 und 4 mittels der Dreieckslenker 8 und Hydraulikbuchsen 12 durch Aufprägen eines dem Wellenlauf gegenphasigen Frequenzmusters stabilisieren. Insbesondere kann man damit in engen Gleisbögen durch geeignete hydraulische Verschaltung der Fluidkammern 31 und 32 eine aktive Lenkung der Radsätze 3 und 4 zur Optimierung der Spurführung und Verschleißminimierung an den Radlaufflächen bewirken. Welche Schaltfrequenz geeignet ist, wird insbesondere in Abhängigkeit der gemessenen Radsatzbeschleunigungen ermittelt.The acceleration signals 603 are supplied to a
Das heißt, dass die Druckerzeugungseinrichtung 607 einen hydraulischen Druck in den Fluidkammern 31 und 32 der einzelnen Hydraulikbuchsen 12 einstellen kann. Dies insbesondere in Abhängigkeit von den gemessenen Beschleunigungssignalen 603. Hierfür umfasst die Reglereinrichtung 605 einen Signalfilter für die Beschleunigungssignale 603, insbesondere einen Echtzeit-Signalfilter. Insbesondere umfasst die Reglereinrichtung 605 einen Signalrechner mit einem Messwertwandler, insbesondere einen Echtzeit-Signalrechner mit einem Messwertwandler. Die Reglereinrichtung 605 umfasst ferner einen Differenzbildner mit einem PI-Regler und einer Sollwertvorgabe für einen Pulssignalumformer. Somit umfasst die Reglereinrichtung 605 insbesondere einen Pulssignalumformer mit einer Ventilsteuereinheit zum Steuern von Ventilen, insbesondere Schaltventilen. Diese Ventile sind der Übersicht halber in
Die Druckerzeugungseinrichtung 607 umfasst ferner einen hydraulischen Pulser, der als Energieumformer und Erzeugungseinheit des benötigten Steuerpulsmusters und des Hydraulikdrucks für die Hydraulikbuchsen 12 in den Dreieckslenkern 8 wirkt. In einer nicht gezeigten Ausführungsform sind ein separater Druckerzeuger und/oder ein separater Druckspeicher zur Sicherstellung des benötigten hydraulischen Druckniveaus für eine aktive Stabilitätsregelung und Lenkung der Radsätze 3 und 4 vorgesehen.The
In einer nicht gezeigten Ausführungsform ist eine Drucküberwachung mit je einem Drucksensor pro gekoppelter Fluidkammer 31, 32 vorgesehen. Dadurch ist in vorteilhafter Weise eine Diagnose im Versagensfall, einer Leckage, ermöglicht.In one embodiment, not shown, a pressure monitor with one pressure sensor per coupled
In
Die Reglereinrichtung 605 und die Druckerzeugungseinrichtung 607 bilden eine Einstelleinrichtung zum Einstellen eines hydraulischen Drucks in den Fluidkammern 31, 32.The regulator means 605 and the pressure generating means 607 constitute an adjusting means for adjusting a hydraulic pressure in the
Analog zu
In den in
Analog zu
Somit bilden die Schaltventile 703 mit der Reglereinrichtung 605 eine Einstelleinrichtung zum Einstellen eines hydraulischen Drucks in den Fluidkammern 31, 32.Thus, the switching
Der erfindungsgemäße Gedanke liegt also insbesondere in einer einfachen Anwendung des bisher bewährten Konzeptes des Dreieckslenkers im Fahrwerk und seine Ausrüstung mit Hydraulikbuchsen sowie deren kraftmäßige Regelung durch Beeinflussung und Veränderung, zum Beispiel Aufprägung, des hydraulischen Druckniveaus in deren Fluidkammern zum aktiven Beeinflussen des Lenkverhaltens der Achslenker an den Radsätzen des Fahrwerks sowie zur Nutzung einer aktiven Stabilitätsregelung durch Aufprägen eines dem Wellenlauf des Radsatzes gegenphasigen Pulsmusters.The idea according to the invention therefore lies in particular in a simple application of the hitherto proven concept of the wishbone in the chassis and its equipment with hydraulic bushes and their force control by influencing and changing, for example imprint, the hydraulic pressure levels in their fluid chambers for active influencing The steering behavior of the wishbone on the wheelsets of the chassis and the use of an active stability control by impressing a the counterclockwise wave pattern of the wheel set pulse pattern.
Es ist also vorgesehen, aktive Steuerkräfte durch die Verwendung eines hydraulischen Pulsers zu erzeugen. Ferner ist eine Nutzung von Beschleunigungssensoren, Echtzeit-Signalfiltern, Echtzeit-Signalrechnern sowie Messwertwandlern zur Sollwertvorgabe für die Reglereinrichtung mit Differenzbildner und Pulssignalumformer für die hydraulische Steuerung und die Aktuatoren, insbesondere die Schaltventile, vorgesehen. Es ist also erfindungsgemäß eine Verwendung hydraulisch gekoppelter Radsätze durch geeignete hydraulische Verbindung und Ansteuerung der Fluidkammern der Hydraulikbuchsen an den Dreieckslenkern zur Lenkung der Radsätze im Fahrwerk vorgesehen. Vorteilhafterweise ist nach einer Ausführungsform der Einsatz einer Drucküberwachung mittels Drucksensoren an den gekoppelten Fluidkammern vorgesehen als Sicherheitseinrichtung im Versagensfall der Hydraulikbuchse und bei unzulässigen Leckagen im Hydrauliksystem der aktiven Fahrwerksteuerung. Erfindungsgemäß ist in vorteilhafter Weise nach einer Ausführungsform die Ausprägung eines aktiven Wendemomentdämpfers für die Stabilisierung des Radsatzlaufes vorgesehen. Die aktive Fahrwerkslenkung und Stabilitätsregelung sowie der aktive Wendemomentdämpfer kann bei ein- und mehrachsigen Fahrwerken, bei Lauf- und Triebfahrwerken, zum Beispiel Drehgestellen, eingesetzt werden.It is therefore intended to generate active control forces through the use of a hydraulic pulser. Furthermore, a use of acceleration sensors, real-time signal filters, real-time signal computers and transducers for setpoint specification for the regulator device with difference generator and pulse signal converter for the hydraulic control and the actuators, in particular the switching valves, is provided. It is therefore provided according to the invention a use of hydraulically coupled wheelsets by suitable hydraulic connection and control of the fluid chambers of the hydraulic sockets on the wishbones for steering the wheelsets in the chassis. Advantageously, according to one embodiment, the use of pressure monitoring by means of pressure sensors on the coupled fluid chambers provided as a safety device in case of failure of the hydraulic jack and inadmissible leaks in the hydraulic system of the active suspension control. According to an embodiment of the invention, the expression of an active torque converter is provided for the stabilization of the Radsatzlaufes in an advantageous manner. The active chassis steering and stability control as well as the active torque converter can be used in single and multi-axle chassis, in running and traction chassis, such as bogies.
Obwohl die Erfindung im Detail durch die bevorzugten Ausführungsbeispiele näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.While the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.
Claims (12)
- Chassis (1) for a rail vehicle (901) comprising:- a chassis frame supported on at least one first wheelset (3) and at least one second wheelset (4),- for each wheelset (3, 4) on both sides of the chassis in each case an A-frame linkage (8) for the horizontal guidance of the axle of the wheelset (3, 4), wherein- each A-frame linkage (8) has articulated joints to one of two axle bearings of a wheelset (3, 4) by a wheelset-side bearing (9) and to the chassis frame by two frame-side bearings (10), characterised in that- at least one of the bearings on each A-frame linkage (8) has a hydraulic bushing (12) with a changeable stiffness, wherein- the hydraulic bushing (12) has at least one fluid chamber (31, 32) which can be filled with a hydraulic fluid, so that a hydraulic pressure can build up in the fluid chamber (31, 32) by which the longitudinal stiffness can be adjusted,- for each axle bearing, an acceleration sensor (601) for measuring an acceleration of the wheelset, and- an adjustment device (605; 607) for adjusting the hydraulic pressure in at least one of the fluid chambers (31, 32) as a function of the measured wheelset acceleration.
- Chassis (1) according to claim 1, wherein the adjustment device (605; 607) is designed, by adjusting the hydraulic pressure in the fluid chamber (31, 32), to actively impose a turning moment on the wheelset (3, 4) corresponding to this fluid chamber (31, 32).
- Chassis (1) according to claim 1 or 2, wherein the bearing with the fluid chamber (31, 32) is the bearing (9) on the wheelset side.
- Chassis (1) according to one of the preceding claims, wherein the adjustment device (605; 607) has a pressure reservoir which can be connected to the fluid chamber (31, 32) .
- Chassis (1) according to one of the preceding claims, wherein the adjustment device (605; 607) has a pressure generation device which can be connected to the fluid chamber (31, 32).
- Chassis (1) according to one of the preceding claims, wherein each hydraulic bushing (12) has a fluid chamber (32) which in the longitudinal direction lies outside and a fluid chamber (31) which in the longitudinal direction lies inside, which in the longitudinal direction are arranged to lie opposite each other and can be filled with hydraulic fluid, wherein a fluid channel is connected to each fluid chamber (31, 32) for an in- or out-flow, as applicable, of hydraulic fluid respectively into or out of the fluid chamber (31, 32), wherein the adjustment device (605; 607) is hydraulically coupled to the fluid channels and is designed to adjust an in- or out-flow of hydraulic fluid, as applicable, so that the hydraulic pressure in the fluid chambers (31, 32) can be adjusted by means of outflows or inflows, as appropriate, of hydraulic fluid.
- Chassis (1) according to claim 6, wherein hydraulic bushings (12) which are arranged on the same side of the chassis are joined via external fluid channels (34) in such a way that the fluid chamber (32) of the first wheelset (3) which lies on the outside and the fluid chamber (31) of the second wheelset (4) which lies on the inside are hydraulically coupled, as are the fluid chamber (31) of the first wheelset (3) which lies on the inside and the fluid chamber (32) of the second wheelset (4) which lies on the outside, wherein the adjustment device (605; 607) is hydraulically coupled to the external fluid channels (34).
- Chassis (1) according to claim 6 or 7, wherein each of the hydraulic bushings (12) has in each case an internal fluid channel (33) via which the fluid chamber (32) which lies on the outside and the fluid chamber (31) which lies on the inside on the one and same hydraulic bushing (12) are hydraulically coupled, wherein the adjustment device (605; 607) comprises on/off valves (703), wherein each internal fluid channel (33) has assigned to it an on/off valve (703) by means of which a flow of hydraulic fluid through the fluid channel can be adjusted.
- Chassis (1) according to one of the preceding claims, wherein a pressure sensor is provided for measuring a hydraulic pressure in the fluid chamber (31, 32).
- Method for operating a chassis (1) according to one of the preceding claims, comprising the following steps:- measurement (801) of a wheelset acceleration (603) for each wheelset (3, 4) by means of the acceleration sensors (601),- adjustment (803) of the hydraulic pressure in at least one of the fluid chambers (31, 32) as a function of the measured wheelset acceleration (603).
- Rail vehicle (901) comprising a chassis (1) according to one of claims 1 to 9.
- Computer program comprising program code for carrying out the method according to claim 10 when the computer program is executed on a computer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL15734129T PL3129272T3 (en) | 2014-07-18 | 2015-07-02 | Chassis for a rail vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014214055.2A DE102014214055A1 (en) | 2014-07-18 | 2014-07-18 | Suspension for a rail vehicle |
PCT/EP2015/065069 WO2016008731A1 (en) | 2014-07-18 | 2015-07-02 | Chassis for a rail vehicle |
Publications (2)
Publication Number | Publication Date |
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EP3129272A1 EP3129272A1 (en) | 2017-02-15 |
EP3129272B1 true EP3129272B1 (en) | 2018-12-12 |
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EP15734129.8A Active EP3129272B1 (en) | 2014-07-18 | 2015-07-02 | Chassis for a rail vehicle |
Country Status (8)
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US (1) | US10300932B2 (en) |
EP (1) | EP3129272B1 (en) |
CA (1) | CA2955206C (en) |
DE (1) | DE102014214055A1 (en) |
ES (1) | ES2706304T3 (en) |
PL (1) | PL3129272T3 (en) |
RU (1) | RU2654429C1 (en) |
WO (1) | WO2016008731A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP4126629B1 (en) * | 2020-05-18 | 2024-06-26 | Siemens Mobility GmbH | Running gear for a rail vehicle |
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DE102013224582A1 (en) * | 2013-11-29 | 2015-06-03 | Siemens Aktiengesellschaft | Suspension for a rail vehicle |
AT518698B1 (en) * | 2016-04-28 | 2021-06-15 | Siemens Mobility Austria Gmbh | Force-controlled track guidance for a rail vehicle |
AT519394B1 (en) * | 2016-11-24 | 2023-01-15 | Siemens Mobility Austria Gmbh | Wheel control arrangement for a landing gear |
US11529976B2 (en) | 2017-02-21 | 2022-12-20 | Siemens Mobility Austria Gmbh | Chassis for rail vehicles |
PL3592621T3 (en) * | 2017-04-21 | 2021-09-06 | Siemens Mobility GmbH | Method for compensating for a loss of traction of a rail vehicle |
CN110861676B (en) * | 2019-12-27 | 2020-10-30 | 义乌轩久铁路技术有限公司 | Device for railway maintenance detection |
DE102020216073A1 (en) * | 2020-12-16 | 2022-06-23 | Siemens Mobility GmbH | Arrangement for the transmission of longitudinal forces in a rail vehicle |
DE102020216069A1 (en) * | 2020-12-16 | 2022-06-23 | Siemens Mobility GmbH | Arrangement for the transmission of longitudinal forces in a rail vehicle |
FR3118446A1 (en) * | 2020-12-28 | 2022-07-01 | Lohr Industrie | SUSPENSION FOR RAILWAY VEHICLE WITH TWO AXLES |
AT524445B1 (en) * | 2021-03-29 | 2022-06-15 | Siemens Mobility Austria Gmbh | Guidance device for landing gear, landing gear and method for mounting a guidance device in a landing gear |
DE102021205082A1 (en) * | 2021-05-19 | 2022-11-24 | Siemens Mobility GmbH | Chassis and rail vehicle |
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2014
- 2014-07-18 DE DE102014214055.2A patent/DE102014214055A1/en not_active Ceased
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2015
- 2015-07-02 EP EP15734129.8A patent/EP3129272B1/en active Active
- 2015-07-02 ES ES15734129T patent/ES2706304T3/en active Active
- 2015-07-02 US US15/327,086 patent/US10300932B2/en active Active
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- 2015-07-02 WO PCT/EP2015/065069 patent/WO2016008731A1/en active Application Filing
- 2015-07-02 PL PL15734129T patent/PL3129272T3/en unknown
- 2015-07-02 CA CA2955206A patent/CA2955206C/en active Active
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EP4126629B1 (en) * | 2020-05-18 | 2024-06-26 | Siemens Mobility GmbH | Running gear for a rail vehicle |
Also Published As
Publication number | Publication date |
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ES2706304T3 (en) | 2019-03-28 |
CA2955206C (en) | 2018-08-21 |
PL3129272T3 (en) | 2019-05-31 |
EP3129272A1 (en) | 2017-02-15 |
DE102014214055A1 (en) | 2016-01-21 |
RU2654429C1 (en) | 2018-05-17 |
US10300932B2 (en) | 2019-05-28 |
CA2955206A1 (en) | 2016-01-21 |
WO2016008731A1 (en) | 2016-01-21 |
US20170166224A1 (en) | 2017-06-15 |
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