Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
  • B61B13/00—Other railway systems
  • B61B13/08—Sliding or levitation systems
• • 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
  • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
  • B61F5/22—Guiding of the vehicle underframes with respect to the bogies

Definitions

• the invention relates to a magnetic levitation vehicle of the type specified in the preamble of claim 1.
• Known magnetic levitation vehicles of this type contain suspension frames which extend in the longitudinal direction of the vehicle and which are connected on the one hand to the carrying magnets which enable magnetic levitation and on the other hand support the actual car body with the passenger cell via air springs.
• the air springs are with a preselected target air pressure of z. B. operated 8 bar and are coupled with an air spring control in the form of a level control, which serves to control the air pressure in the manner that no cross-inclinations of the vehicle occur.
• a level control which serves to control the air pressure in the manner that no cross-inclinations of the vehicle occur.
• the technical problem on which the invention is based is to design the magnetic levitation vehicle of the type described at the outset in such a way that the supporting magnet, which remains functional in the event of an accident, can continue to absorb part of the load transmitted via the air spring, but without being overloaded, itself if it is not designed for an accident.
• the invention has the advantage that the pressure in the air spring in the event of failure of one of the two supporting magnets assigned to it can be reduced to such a pressure as corresponds to the nominal load capacity of the non-failed supporting magnet. Since the pressure in the air spring is a measure of the force transmitted to the supporting magnet, it is usually sufficient to halve the usual air pressure. This results in the further advantage that the load not taken up by this support magnet can be distributed to several other of the numerous (e.g. 16) air springs of the magnetic levitation vehicle, so that in the event of a malfunction excessive loads do not occur on any of the support magnets.
• Figure 1 is a schematic partial section through a conventional magnetic levitation vehicle and an associated route.
• Fig. 2 shows schematically the side view of a conventional magnetic levitation vehicle;
• FIG. 3 shows an enlarged detail X of the magnetic levitation vehicle according to FIG. 2 with further components
• FIG. 4 shows a circuit diagram of an electropneumatic control device for the air spring of the magnetic levitation vehicle according to FIG. 3.
• Fig. 1 shows schematically a cross section through a magnetic levitation vehicle 31, which is mounted in a conventional manner on a track running in the longitudinal direction of a route, which contains beams 32 made of steel and / or concrete and track plates 33 mounted thereon.
• the magnetic levitation vehicle 31 is driven, for. B. by means of a long stator motor, which is attached below the guideway plate 33 and has successive stator packs 34 in the longitudinal direction thereof.
• the stator packs 34 have alternating successive teeth and slots, not shown, in which windings are inserted, which are fed with three-phase current of variable amplitude and frequency.
• the actual field of excitation of the long stator motor is generated by at least one first magnet arrangement acting as a support magnet 35, which is attached to the magnetic levitation vehicle 31 with at least one side frame bracket 36 and has the magnetic poles facing downward in FIG.
• the support magnet 35 not only provides the excitation field, but also fulfills the function of carrying and floating by having a predetermined gap 37 of z. B. 10 mm between the support magnet 35 and the track or its stator packs 4 is maintained.
• the guideway plate 33 For guiding the magnetic levitation vehicle 31, the guideway plate 33 has guide rails 38 mounted on the side, which are also opposed by guide magnets 39 which are mounted on the frame brackets 36 and which during operation serve to maintain a gap 40 corresponding to the gap 37 between them and the guide rail 38.
• the magnetic levitation vehicle 31 contains a car body 2, on the underside of which a plurality of air springs 4 are mounted, which are spaced apart in the direction of a vehicle longitudinal axis 3.
• Each air spring 4 acts on the front or rear end of suspension frame sections 5, which form a suspension frame supporting the car body 2 and between which articulation points 6 shown as spaces are provided, which serve that the suspension frame sections 5 can perform the required longitudinal and transverse movements ,
• the suspension frame sections 5 are provided at their ends with support elements 5a in the form of frame parts or the like, which are supported on the support magnet 35.
• Each support element 5a has two support points 5b (FIG. 3) lying one behind the other in the direction of the longitudinal axis 3, which are fastened to an associated supporting magnet 35 with further springs 8.
• the arrangement is such that a support magnet 35 acts on each support point 5b of a support element 5a, which is designated 35 A and 35B in FIGS. 2 and 3.
• FIG. 3 also shows a slide rail 9 which is attached to the travel path 32, 33 shown in FIG. 1 for the magnetic levitation vehicle 31 and on which the magnetic levitation vehicle 31 by means of skids 10 which are fastened to the suspension frame sections 5, is discontinued when the support magnets 35 are de-energized and therefore cannot serve the "carry" function.
• the support magnets 35A, 35B are each assigned a control circuit 11 A, 11B, which serves to provide a size of, for example, the support gap 37 provided between the guideway 2, 3 or its stator packs 34 and the associated poles of the support magnets 35. B. 10 mm to give the levitation of the magnetic levitation vehicle 31.
• the movement of the magnetic levitation vehicle 31 in the direction of the longitudinal axis 3 takes place, for. B. by means of the long-stator linear motor described with reference to FIG. 1.
• Magnetic levitation vehicles 31 and their magnet arrangements are known to the person skilled in the art. B. from the publications US-PS 4,698,895, DE 30 04 704 C2, DE 39 28 277 AI and PCT WO 97/30504 AI generally known, which are hereby made for the sake of simplicity by reference to the subject of the present disclosure.
• the air spring 4 is assigned a control device 14 according to the invention, which has the function described below with reference to FIG. 4 and is connected to those two control loops HA, 11B which act on the two support points 5B of the floating frame section 5 assigned to the air spring 4.
• the control device 14 includes a compressed air source 15 which, for. B. can be a compressor or a level control unit of no interest here and is connected via a line 16 to the air spring 4. Between the compressed air source 15 and the air spring 4, two control valves 17 and 18 are connected in series in the line 16, both of which lead via a throttle 19, 20 to a vent line 21, 22 or to the outside atmosphere. Both control valves 17 and 18 can be controlled via control lines 23, 24 at least in such a way that they switch line 16 to passage in a first position, but shut off against ventilation lines 21, 22, or in a second position line 16 at least on the side of Connect air spring 4 to the vent line 21, 22.
• a compressed air source 15 which, for. B. can be a compressor or a level control unit of no interest here and is connected via a line 16 to the air spring 4.
• two control valves 17 and 18 are connected in series in the line 16, both of which lead via a throttle 19, 20 to a vent line 21, 22 or to the outside atmosphere. Both control valves 17 and 18 can be controlled
• line 16 is assigned two pressure switches 25, 26, which monitor the air pressure in line 16 and emit a switching signal when a preselected air pressure is reached. Both pressure switches 25 and 26 are connected to both the control circuit HA and the control circuit 11B. Finally, a ventilation valve 27 is also connected to the line 16, to which a pressure switch 28, which is also connected to the line 16, is assigned and which can either be switched to continuity via a control line 29 or can shut off the line 16. For the sake of simplicity, further components which are not important for the invention are not shown.
• the mode of operation of the control device 14 according to FIG. 3 is as follows: Before the magnetic levitation vehicle 1 is put into operation, the air spring 4 is set to a preselected target air pressure via the line 16 after opening the control valve 27 and with control valves 17, 18 switched to passage. If this is reached, which is signaled by the pressure switch 28, the control valve 27 is closed again. The magnetic levitation vehicle can now be put into operation. If the load capacity fails, e.g. B. the support magnet 35 A on the suspension frame section 5, the support magnet 35B normally receives twice the load capacity compared to the state before the failure by the electrical current through its winding, not shown, is increased accordingly by the associated control circuit 11B. In contrast to this, according to the invention, automatic ventilation of the
• Air spring 4 to a preselected fraction of the target air pressure supplied by the compressed air source 15 or previously produced in the air spring 4 (e.g. from originally 8 bar to only 3.5 bar), thereby reducing the original load-bearing capacity of the support magnet 35B to restore or set the partial load transmitted to the supporting magnet 35B via the air spring 4 to a value which corresponds to the carrying capacity of the supporting magnet 35B at its nominal current.
• the control valve 17 is brought via the control line 23 into a position in which the line 16 is connected via the throttle 19 to the vent line 21, so that the air escapes from the air spring 4 via this path.
• the control of the control valve 17 takes place with the aid of an error signal, which is fed to the control line 14 from the control circuit HA of the failed supporting magnet 35A and z. B. is generated when the support magnet 35A is de-energized or there is another error.
• the ventilation of the air spring 4 is continued until the associated pressure switch 25 indicates that there is only a fraction of the original air pressure in the line 16 between the closed control valve 27 and the air spring 4 and thus also in the air spring 4 itself , Subsequently, the control valve 17 is switched back to passage via the control line 23 and thus the line 16 is separated from the vent line 21.
• the air spring 4 is now operated at a pressure which is reduced compared to the target air pressure.
• the load portion not then attributable to the support magnet 35B is preferably distributed as evenly as possible to the remaining support magnets 35 of the magnetic levitation vehicle 1 (FIG. 1). This largely prevents overloading of the support magnets 35.
• a redundant device is provided according to the invention, which comprises the parts 18, 20, 22, 24 and 26. This facility works as follows:
• control circuit 11B is automatically increased by the control circuit 11B beyond the nominal current. This leads to a corresponding increase in the control circuit 11B z. B. at the output of the relevant actuator.
• the control circuits HA, 11B are therefore additionally provided with limit value monitors in the form of threshold switches or the like which, when a preselected limit value is reached or exceeded, in particular with regard to the current in the winding of the support magnet 35B, via the control line 24 in FIG. 4 Bring the control valve 18 into the position in which it connects the line 16 to the vent line 22.
• the invention is not restricted to the exemplary embodiment described, which can be modified in many ways. This applies in particular to the load distribution described in the area of the suspension frame sections 5 and the support elements 5a. In particular, this load distribution can also be provided in an analogous manner on both longitudinal views of the magnetic levitation vehicle 1 if the latter is provided with corresponding supporting magnets on the right and left. How the load is distributed to the support magnets 35 with the aid of the air springs 4 can in principle be decided depending on the needs of the individual case. The air pressures given by way of example can also be replaced by others. Furthermore, the configuration of the control device 14 can be carried out differently from that shown in FIG. 4, the various control processes in particular being able to be controlled using microprocessors or the like. It is also clear that all of the air springs 4 present in the magnetic levitation vehicle 1 can be controlled in a corresponding manner. Finally, it goes without saying that the various features can also be used in combinations other than those shown and described.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Vehicle Body Suspensions (AREA)
• Fluid-Damping Devices (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (6)

Families Citing this family (7)

Family Cites Families (9)

• 2004
  • 2004-03-18 DE DE102004013690A patent/DE102004013690A1/de not_active Withdrawn
• 2005
  • 2005-03-10 CN CNB2005800010572A patent/CN100554058C/zh not_active Expired - Fee Related
  • 2005-03-10 DE DE502005010263T patent/DE502005010263D1/de active Active
  • 2005-03-10 WO PCT/DE2005/000419 patent/WO2005090137A1/fr active Application Filing
  • 2005-03-10 AT AT05715083T patent/ATE481283T1/de active
  • 2005-03-10 US US10/592,716 patent/US8794158B2/en active Active
  • 2005-03-10 EP EP05715083A patent/EP1725441B1/fr active Active

Non-Patent Citations (1)

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