FR2682134A1 - TRACK FOR RAIL SYSTEMS WITH MAGNETIC SUPPORT, IN METALLIC CONSTRUCTION, AS WELL AS ITS MANUFACTURE. - Google Patents

Abstract

In a track for railway vehicles with magnetic levitation, of metal construction and in the form of a trough, the metal construction consisting of bottom flanges (115), cross members (114), webs (111), web stiffeners (112), upper flanges (21) and lateral guide rails (22), the upper flanges (21) being fixed to the webs by longitudinal welded joints, it is provided that the upper flanges are additionally each held by a cover panel (113) with which they are connected by a longitudinal welded joint, the cover panel (113) being fixed on the side of the web stiffeners (112), opposite to that adjacent to the webs (111), in thus making it possible to eliminate the transverse joints for the connection of the web stiffeners (112) to the upper flanges (21).

Description

TRACK FOR RAILWAY SYSTEMS

  MAGNETIC, IN METALLIC CONSTRUCTION, AS WELL AS

MANUFACTURING.

  The invention relates to tracks for railway systems with magnetic levitation, in metal construction and in the shape of a trough. In railway systems with magnetic levitation, magnets on vehicles cooperate with stators placed along the track, for propulsion. and at least in part for support To maintain the spacing and the guiding between the magnets of the vehicle and the stators arranged in the tracks, vertical and horizontal guide rollers are used on the vehicle, which are guided by elements of guidance, above and below the track Already small variations in the air gap between the stators and the magnets on the vehicle have a significant influence on the kinematic behavior of the vehicle, so that tight tolerances are necessary to the guide elements with a view to ensuring a circulation operation which is comfortable and of low wear. According to the document PCT / EP 90/01598, it is known to obtain the shape in trough, using solid vertical webs which are connected to each other by crosspieces, at determined intervals, the webs being stabilized by means of stiffeners, and the soles upper being fixed on the webs and the core stiffeners by welded longitudinal and transverse joints The transverse joints by which the upper flanges are connected to the web stiffeners, constitute here a drawback Indeed, these transverse joints deform the upper flange and make it corrugated, so that the upper flange must be resumed in machining, or it is necessary to install a separate additional rail, for the vertical guide rollers of rail vehicles with magnetic lift. Furthermore, it is known from document PCT / EP 90/01598 already cited, to have the upper flanges on the lower wings located inside beams with double l profiles. In this case, the drawback lies in the very limited possible width of the superstructure of the magnetic levitation rail vehicle, in relation to the track width In addition, the construction of curves proves to be very difficult The tight tolerances required can also only be very difficult to meet , or even require resumption of machining In addition, the possibility of adjustment proposed, using screws and a cradle, requires a complicated installation device Similarly, in the case of such a method of fixing , undulations can hardly be avoided, so that in the assembled state, it is - necessary to carry out a resumption of machining to reduce the undulation Finally, in the case of a sowing The upper one placed deep in the track, the construction of the lift bogie

magnetic is more complicated.

  Also, the aim of the present invention is to provide a railroad track with magnetic lift in the shape of a trough, as well as a method and a device for its manufacture, which make it possible to respect without problem and economically, the

tolerances required.

  The magnetic levitation railway track is made by a metal construction comprising lower flanges to which are connected crossbeams and vertical webs extending longitudinally and reinforced by vertical web stiffeners In addition, according to static requirements, beams can be provided diagonally between the individual crosspieces The metal construction further comprises upper flanges and lateral guide rails, the upper flanges being fixed to the webs by longitudinal welded joints In accordance with the invention, the desired objective is achieved thanks to the fact that the upper soles are additionally held each by a cover panel with which they are connected by a welded longitudinal joint, the cover panel being fixed on the side of the web stiffeners, opposite to that adjacent to the webs, thus allowing to remove the seals transverse for connection

  from stiffeners to the upper soles.

  According to the invention, the upper sole is therefore welded only to the core and the panel

  cover, but not on the stiffeners.

  Thus, the forces appearing on the upper flange are transmitted continuously to the core stiffeners, via the cover panel, and a deformation by transverse joints, such as that appearing in the case of the fixing of the stiffeners.

  of soul on the upper soles, does not occur.

  The warping caused by the longitudinal joints can be calculated in advance, and therefore it is possible to reach the desired shape without resuming machining, by an appropriate adjustment of the welding device. Similarly, the construction does not flex under the weight of the vehicle It is particularly advantageous to fix the lateral guide rail on the lower side of the upper sole, only after mounting the upper sole, because the construction is then already strong and stable In this way the influence reciprocal of the tolerances between them is neutralized, that is to say that one obtains first the vertical tolerances by mounting the upper sole, and it is only then that one obtains without problem, with tight tolerances, the actual position of the track axis, by mounting the lateral guide rails An adjustment simultaneously in lateral direction and in height, which is n necessary in the case of mounting upper flanges already having the lateral guide rails, is on the other hand very delicate Thanks to the construction method generating little deformation, the upper flange can be used directly as vertical guide, without resuming machining It is particularly advantageous in the curves, that the contours in space, of the track, are carried out only using the upper flanges and lateral guide rails, while the other parts of the metal construction have the same position of cross section that in the case of straight sections Thus, only the upper sole and the lateral guide rails take a transverse inclination, while the core, the cover panel and the core stiffeners remain vertical The construction of the trough therefore remains simple By keeping the same height for the position of the center line in the curves, the inner side of the yard be lowered and the outer side of the curve raised, the acceleration of lifting is minimized and the comfort of circulation is increased The webs and the cover panels are then advantageously lower on the inner side of the curve and higher on the outer side of the curve, than in the case of straight track sections, in order to be able to absorb the centrifugal forces which

appear, and strengthen the way.

  As the upper sole also serves as a reaction surface for the auxiliary mechanical braking device of rail vehicles with magnetic levitation, it is advantageous to provide this area or the whole of the upper sole with corrosion protection having a range narrow coefficient of friction, in order to simplify the construction of the auxiliary brake on the vehicle This corrosion protection has the high mechanical properties of resistance to braking stresses, and contains for example

zinc silicates.

  The stators are advantageously screwed under the upper flanges and are then sealed. To avoid costly monitoring of the various individual screws, flat support pieces are advantageously welded in an inclined manner on the lower side of the upper flange, and prevent in combination with the shape of the stator, for example using trapezoidal slides, so that the stator can be lowered, because for example between the stator and the flat support piece welded at an inclination, is still the sealing material Even when the sealing material, which advantageously surrounds the stator and the flat support parts, disappears completely, the stator cannot lower, for example, by more than 4 mm. A lowering of, for example, 4 mm is easily detectable, but does not lead to any other deterioration, since the air gap between the stators and the magnets on the vehicle is greater. According to other construction details of the invention, the upper sole serves as a reaction part for emergency pads mounted on vehicles, thereby making it possible to obtain safety from derailment. Furthermore, the lateral guide rails serve of sealing element for the sealing compound The construction can be provided with a protection against corrosion reflecting the sun's rays In addition, between track joists

  individual, are mounted connecting plates.

  Thanks to the trough shape, the intermediate space between the soles can be used as an emergency escape route, when above the sleepers there is advantageously a displacement surface which can be reached from vehicles railways with magnetic levitation, via emergency staircases which can be

  extracts from vehicles by sliding or tilting.

  For the manufacture of the track beam according to the invention, first of all the assembly is carried out according to the shape of the required layout, of the lower structure of the trough composed of the lower flanges, sleepers, webs and core stiffeners, only rough tolerances to be

  respected, with the exception of the upper side of the souls.

  Then, the upper soles are cut in two dimensions, preferably by flame cutting, in steel plates Then, the cut upper soles are deposited and clamped in a device which has the shape in the desired space, inverted by 180 ', of the upper sole, the lower side of the upper soles being directed upwards The lower structure is then deposited, with the upper side of the cores, on the lower side of the upper sole, and the cores are welded longitudinally to the upper soles At the As a result, the cover panels are connected to the upper flanges and to the core stiffeners, preferably by welding. Any undulations appearing on the upper flange in the area of the cover panel have no influence on the guidance.

  vertical at the other end of the upper sole.

  Finally, the lateral guide rails are mounted only at this stage of production. As the construction is already very stable and there can hardly be any deformation during welding, the lateral guide rails are preferably fixed by welding D other fixing methods are naturally also possible, such as for example

screw fixing.

  Finally, the device according to the invention, for the manufacture of a track beam with magnetic levitation, is characterized in that the shape of the upper flanges is reproduced by means of rotating frames adjustable in height and in inclination On the rotating frames transverse carriages are provided with the help of which the desired radius of the track axis is reproduced Furthermore, on the transverse carriages is fixed a profile, which after the adjustment of the rotating frames and the transverse carriages takes shape in track axis space This profile serves as a guide for the spacer for the lateral guide rails and the carriage

pointing and welding.

  The invention will now be explained in more detail, with reference to preferred embodiments shown in the accompanying drawings which show: Fig 1 the cross section of a known track, in which the upper sole comprises

  an additional vertical guide rail.

  the cross section of another known. Fig 3 Fig 4 Fig 5 Fig 6 and Fig 8 the cross section of the metal construction of the track beam according to the invention. the cross section of the track beam according to Figure 3, with additional functional components and a lift bogie. a track beam according to the invention,

curved to the right.

  7 a preferred attachment of the stators.

a cross section of the trough.

  Fig 9 and Fig 11 a cross section of the track beam according to the invention, arranged on the manufacturing device according to the invention. a top view of part of the device

Manufacturing.

  In FIG. 1, the core 111, the core stiffener 112, the cross member 114 and the upper sole 21 are recognized. The upper sole 21 is welded longitudinally to the core 111 and welded transversely to the core stiffener 112 Les deformations appearing due to welding, make it necessary a separate angle iron 211, the upper part of which serves as a vertical guide rail and whose Fig 2 flies the side part serves as the horizontal guide rail The known track profile, represented in FIG. 2, comprises two double "T" beams 117, the lower wing located inside is transformed into a box profile 118 These box profiles 118 serve as support for the upper flange 21 In this case, the curved construction s' proves to be particularly difficult The tight tolerances required by rail systems with magnetic levitation can only be met with great difficulty, even with a e resumption of mechanical machining Figure 3 shows a cross section of a metal construction of the track beam according to the invention It consists of lower flanges 115, sleepers 114, webs 111, web stiffeners 112 , cover panels 113, upper flanges 21 and lateral guide rails 22 It can be seen that the upper flanges 21 are welded only on the webs 111 and the cover panels 113 Between the core stiffeners 112 and the upper flanges 21 an air gap is provided The track axis (imaginary) 12 extends in the center between the upper edges of the flanges

higher 21.

  Figure 4 shows a cross section of the track beam according to the invention, and how it cooperates with a railway bogie with magnetic lift In addition to the elements shown in Figure 3, the track beam is here provided of the stator 23 and of its sealing 234 The stator 23 cooperates with the magnet 531 on the magnet supports 53 of the railway bogie with magnetic levitation, for the propulsion and in part the support of the railway bogie with magnetic levitation The horizontal guide rollers 521, the upper vertical guide rollers 522 and the lower vertical guide rollers 523 ensure, by means of a lever and spring system 524 shown only partially, the establishment of the correct distance between the magnets 531 and the stator 23. In this case, the upper vertical guide rollers 522 run directly on the upper side of the upper sole 2 1, the lower vertical guide rollers 523, directly on the lower side of the upper flange 21, and the horizontal guide rollers 521, directly on the lateral guide rail 22 In FIG. 4 is also shown a

  emergency displacement platform 13 added.

  FIG. 5 shows a view of a track beam curved to the right. It is visible that the webs 111, the web stiffeners 112 and the cover panels 113 are always arranged vertically, and that the track axis 12 remains always located at the same height, while the right core 1111 is lowered and the left core 1112 is raised, so that the upper flanges are inclined towards the inside of the curve The left core 1112 and the cover panel left 1132 are advantageously higher than the soul

  right 1111 and the right cover panel 1131.

  The left core 1112 and the left cover panel 1132, as external supports, have to support the greatest loads. As they are larger, they are consequently more rigid and can thus

  absorb larger forces without problem.

  Thanks to this configuration, a possible emergency displacement platform 13 of FIG. 4 will remain

also horizontal.

  FIG. 6 shows a cross section of a particularly preferred attachment of the stators 23, consisting of the stack of stator sheets 231 and of the slides 232, under the upper sole 21, by means of screws 2322 The slides have in the upper part of their cross section, a flare 2321 of trapezoidal shape, which in combination with the flat support pieces 233 welded in an inclined manner, prevent the stator 23 from being able to lower by for example more than 4 mm, if the screws 2322 came to loosen, because it would then be supported by the flat support pieces 233 Furthermore, it can be seen that the stator 23 is advantageously surrounded by the sealing mass 234, which extends from the core 111

  not shown up to the lateral guide rail 22.

  In FIG. 7, it is possible to see a longitudinal section of the stack of stator sheets 231 with its slides 232, fixed to the upper flange 21 by means of screws 2322, as well as flat support pieces 233 welded with inclined way The winding of

stator is not shown.

  FIG. 8 shows the metal construction according to the invention, without the cover panels, without the upper flanges and without the lateral guide rails. This part is preferably made from a traditional metal construction. Figure 9 shows a cross section of the device according to the invention, intended for the manufacture of track beams, in which is mounted a partially manufactured track beam. The device is composed of base chassis 7111 in which are placed sleepers base 7113, adjustable in height In the base crossbars 7113 are mounted rotating frames 7114, which can be pivoted in accordance with the necessary transverse inclination In the rotating frames 7114 are mounted transverse carriages 7115 which can slide laterally On the transverse carriage 7115 is fixed, in the center, a profile 7116 which, after the adjustment of the basic sleepers 7113, the rotating frames 7114 and the transverse carriages 7115, takes the form in the space of the track axis 12 The upper side of the carriages cross 7115 has a configuration in two steps On the lower step 7117 7115 cross carriages are placed the upper soles 21, with their upper side down, so that they come to bear with their inner sides 213 and 214 against the upper steps 7118 of the transverse carriages 7115 Then the upper soles 21 are tightened on the transverse carriages 7115, using a device not shown, and thus take the shape in the desired space before welding Then, the trough of Figure 8 is deposited, with the upper sides of the webs 111, on the lower side of the upper flanges 21 with which it is assembled by welding The cover panels 113 are then preferably welded to the core stiffeners 112 and the upper flanges 21 Thus the upper flanges 21 are fixedly connected, reliable and stable in shape, at the trough of FIG. 8 The lower steps 7117 of the transverse carriages 7115 are advantageously made so that the sole s superior 21 do not rest entirely, but only approximately to the middle

  between the cores 111 and the cover panel 113.

  Thus, any undulations appearing in the external zone of the upper sole, remain confined to the external zone where they do not disturb the functioning of the magnetic levitation rail system. FIG. 10 shows the assembly of FIG. 9, and more a pointing and welding carriage 7121 It travels with the guide rollers 7123 along the profile 7116, and brings the lateral guide rails 22, using the spacers of the lateral guide rails 7122, in the correct position. position, and fixes them by pointing and welding by means of a pointing and welding device not shown. As the guide profile 7116 has the shape in the precise space of the track axis 12, and that the assembly of the construction of the track beam is further reinforced by the lateral guide rails 22, the tolerances imposed can be respected without problem Then, the track beams are equipped with stators 23, this preferably in the way

  shown in Figures 6 and 7.

  FIG. 11 shows the top view of a part of the manufacturing device according to the invention It is possible to recognize a base frame 7111, which guides the base crosspieces 7113 in which the frames are rotatably mounted

  7114 turntables with their 7115 cross slide.

  According to the invention, for a 25 m long track beam, approximately 17 frames are used.

base 7111 fixed in a row.

Claims (22)

CLAIMS.   1 Track for railway vehicles with magnetic levitation, in metal construction and in the shape of a trough, the metal construction consisting of lower flanges (115), sleepers (114), webs (111), web stiffeners ( 112), upper flanges (21) and lateral guide rails (22), the upper flanges (21) being fixed to the webs by longitudinal welded joints, characterized in that the upper flanges are additionally each held by a cover panel (113) with which they are connected by a longitudinal welded joint, the cover panel (113) being fixed on the side of the web stiffeners (112), opposite to that adjacent to the webs (111), allowing thus eliminating the transverse joints for the connection of the core stiffeners (112) to the upper flanges (21).   2 Track according to claim 1, characterized in that the lateral guide rails (22) are fixed on the upper flanges (21) only after the mounting them.   3 Track according to claim 1 or 2, characterized in that the upper sole (21) serves vertical guide.   4 Way according to one of claims   previous, characterized in that in the case of curves, the contours in the space of the track, are executed only using the upper flanges (21) and lateral guide rails (22), while the other parts of metal construction have the same cross-sectional position as   in the case of straight sections.   Track according to claim 4, characterized in that the track axis (12) remains at the same height in the curves, in order to minimize the uplift acceleration, the inner side of the curve being   lowered and the outer side of the curve being raised.   6 Track according to claim 5, characterized in that the core (111) is of a lower height on the inside of the curve, and of a higher height   large on the outside of the curve.   7 Track according to claim 4, characterized in that the cover panel (113) is of a lower height on the inside of the curve, and of a greater height on the outside of the curve.   8 Route according to one of claims   previous, characterized in that the upper sole (21) serves as a reaction surface for the mechanical braking device of vehicles   railways with magnetic levitation.   9 Track according to claim 8, characterized in that the reaction surface is provided with a corrosion protection having a range   narrow coefficient of friction.   Track according to claim 9, characterized in that the corrosion protection has the high mechanical strength properties braking stresses.   11 Track according to claim 9, characterized in that the protection against corrosion contains zinc silicates.   12 Route according to one of claims   previous, characterized in that stators (23)   are screwed under the upper sole. 13 Route according to claim 12,   characterized in that the stators (23) are sealed.   14 Track according to claim 12 or 13, characterized in that the stators (23) comprise slides (232) in the shape of a trapezoid which, in combination with flat support pieces (233) welded in an inclined manner under the upper flanges (21), prevent the stators (23) from being able to detach appreciably from the upper sole (21), despite defective screws (2322). Route according to one of the claims   previous, characterized in that the upper sole (21) serves as a reaction part for emergency pads mounted on vehicles, in   thus obtaining derailment safety.   16 Route according to one of claims   previous, characterized in that the lateral guide rails (22) serve as a sealing element for the sealing compound.   17 Route according to one of claims   previous, characterized in that it is provided with a protection against corrosion reflecting solar rays.   18 Route according to one of claims   previous, characterized in that the bottom of the trough is provided with a displacement surface (13) acting as an emergency path, which can be reached from rail vehicles with magnetic levitation, by means of emergency stairs that can be removed from vehicles by sliding or tilting.   19 Route according to one of claims   previous, characterized in that between individual track beams are mounted joint plates. 20 A method of manufacturing a beam of magnetic levitation track, composed of the elements indicated in claim 1, characterized in that one manufactures first of all according to the shape of the required route, the lower structure composed of the flanges lower (115), sleepers (114), webs (111) and web stiffeners (112), only rough tolerances to be met, with the exception of the upper side of webs (111), in that the upper soles (21) are cut in two dimensions, from steel plates; in that the cut upper soles (21) are deposited and clamped in a device which has the shape in the desired space, inverted by 180, of the upper sole (21), the lower side of the upper soles (21) being directed to the top; in that the lower structure is deposited, with the upper side of the webs (111), on the lower side of the upper sole (21); in that the cores (111) are welded to the upper flanges (21); and in that the cover panels (113) are connected to the upper flanges (21) and to the stiffeners of soul (112).   21 Method according to claim 20, characterized in that the cover panels (113) are welded on the upper flanges (21) and on the web stiffeners (112).   22 Method according to claim 20 or 21, characterized in that the lateral guide rails (22)   are welded to the upper sole (21).   23 Method according to claim 20 or 21, characterized in that the lateral guide rails (22)   are screwed onto the upper sole.   24 Device for manufacturing a magnetic lift track beam, characterized in that the shape of the upper flanges (21) is reproduced by means of adjustable rotating frames (7114) in height and tilt.   Device according to claim 24, characterized in that transverse carriages (7115) are provided on the rotary frames (7114) with the aid of which the desired radius of the axis of the machine is reproduced. track (12).   26 Device according to claim 25, characterized in that on the transverse carriages (7115) is fixed a profile (7116), which after the adjustment of the rotating frames (7114) and the transverse carriages (7115), takes the form in the track center space (12).   27 Device according to claim 26, characterized in that the profile (7116) serves as a guide for the spacer support (7122) of the guide rails   side and the pointing and welding carriage (7121).