EP1180174B1 - Semelle en elastomere pour le support d'un rail de chemin de fer sur une traverse - Google Patents
Semelle en elastomere pour le support d'un rail de chemin de fer sur une traverse Download PDFInfo
- Publication number
- EP1180174B1 EP1180174B1 EP00931309A EP00931309A EP1180174B1 EP 1180174 B1 EP1180174 B1 EP 1180174B1 EP 00931309 A EP00931309 A EP 00931309A EP 00931309 A EP00931309 A EP 00931309A EP 1180174 B1 EP1180174 B1 EP 1180174B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- base pad
- pad according
- preceeding
- rail
- 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.)
- Expired - Lifetime
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
- E01B9/686—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape with textured surface
Definitions
- the present invention relates to an elastomer sole for the support of a railway rail on a sleeper.
- the object of the present invention is to solve this problem reliably and efficiently by optimizing behavior sole mechanics in response to rail vibrations; this optimization being carried out by acting in particular on the formulation of the elastomer and / or the geometry of the sole.
- peripheral support area is plane and its surface is between one and ten times the surface of the inner side wall of said cavity, so that the ratio of secant stiffnesses taken respectively between load values static of 20 and 100 KN and dynamic overload values of 20 and 80 KN, which is greater than or equal to 0.45.
- the secant stiffness is comparable to the slope of the straight line joining two points corresponding to the deflections measured for values of extreme loads or overloads.
- the secant static or dynamic stiffness (which is relative to sudden changes in load due to shocks) is defined as equal to the ratio of a quarter of the axle load by the deflection due to this single charge, therefore deducting the depression caused by the intrinsic and permanent load of track elements (rail, sleeper, ties ).
- the overload corresponds to a total charge resulting of the sum of the static charge and the dynamic overload related to shocks.
- this ratio of secant stiffnesses corresponds to the filtering capacity of the sole and translates the effectiveness of filtering, when the sole is subject to the effects resulting from major contact faults rail / wheel.
- said cavity is located so that the minimum stiffness is located on the median axis of the upper face so as to possibly limit the rotation of the rail under the effect of lateral forces.
- said cavity has generators parallel to normal on the upper side.
- said cavity is cylindrical and opens onto the underside of the sole.
- said cavity has an axis of revolution and has an internal side wall with curvilinear periphery and preferably oval.
- the periphery of said cavity is oval.
- said cavity has a polygonal contour.
- This specific geometry of the cavity limits the creep of the elastomer towards the interior of the cavity, which saves material.
- said sole is produced with an elastomeric material with a modulus of elasticity substantially stable over a temperature range between 0 ° C and 40 ° C.
- the depth of said cavity represents at least 80% of the total thickness.
- said cavity is unique and centered on the upper side.
- the sole has six cavities.
- the thickness of the sole is between 4 and 12 mm, and preferably between 7 and 9 mm.
- the sole of the invention provides a significant reduction in the air noise generated by rail vibrations during the passage of trains compared to known resilient soles of the fluted type or pads.
- This weakening of noise pollution is accompanied by in addition, a reduction in the wear of track components (cross member, fasteners, ballast %) and thus allows an extension of their service life while jointly offering a substantial cost saving maintenance.
- the sole of the invention has, at low load, greater stiffness than traditional soles, which facilitates the initial operations of laying and adjusting the rail during production of the way.
- the sole of the invention is produced in a simple and economical, for example, by molding an elastomeric material based natural or synthetic rubber formulated to meet requirements of the different specifications.
- Figures 8A and 8B are graphs comparing deflections obtained under different loads with the soles according to the invention, respectively vis-à-vis the prior art and between them.
- Figures 9A and 9B show the variations in stiffness tangential as a function of the load by comparing the flanges of the invention, respectively with respect to the anterior soles and between they.
- the sole 1 shown in Figures 1B to 6 is intended to be mounted on a railway sleeper to support a rail (not shown).
- This sole includes an upper face 1a at contact of the rail pad and a lower face 1b in contact with the
- the median X axis of the sole corresponds to the normal position rail support.
- the sole includes at least one opening cavity 10, preferably on the underside 1b, leaving an area support device 11 for the rail pad, in the modes of embodiment of Figures 1 to 5, the sole has a single cavity while that in that of Figure 6, it has six cavities. Edges sides of sole 1 are provided with notches 12 intended to prevent or at least to limit the path of the rail by cooperation with the attachment device (not shown).
- the support zone 11 is always flat and its surface is between a and ten times the surface of the internal side wall 10a of the cavity 10.
- the coefficient called shape, corresponding to the ratio of these two surfaces, is given in the table below.
- This specific geometry provides a power of vibration filtration greater than or equal to 0.45 for values extremes of static load of 20 and 100KN and dynamic overload from 20 and 80KN.
- Filtration power is defined as the ratio of secant stiffnesses corresponding respectively to static loads and dynamic overloads considered. The values obtained, according to the invention for this power, are given in the table below.
- the sole is made of an elastomeric material, the elastic modulus is substantially stable over a temperature range between 0 ° C and 40 ° C.
- the cavity here is unique and centered on the sole 1, but of more generally, this cavity is positioned so that the minimum stiffness is obtained on the median axis X.
- the cavity 10 is cylindrical and its internal side wall has generators parallel to normal to the upper face 1a while its depth represents at least 80% of the total thickness of the sole 1 as shown in FIG. 1A where a veil 13 of material remains forming the bottom 10b. If necessary, this veil 13 can extend so interlayer in the cavity 10, between the level of the upper faces and lower.
- the bottom 10b closes, upwards, the cavity 10 by preventing thus any penetration of water or foreign particles, and ensuring, in addition, good electrical insulation of said cavity so as to avoid the appearance of an electric arc inside the latter.
- the thickness of the sole is generally between 4 mm and 12 mm, depending on the applications envisaged.
- the modes of realization exemplified here and presented on the table and graphs correspond to respective thicknesses of 7 mm and 9 mm.
- the cavity 10 has an axis of revolution and has an internal side wall 10a whose profile is curvilinear.
- the periphery of the cavity 10 is oval while in Figures 2 and 3, this periphery is circular.
- the cavity 10 has a polygonal outline in rhombus and square respectively.
- the cavities have a circular peripheral edge.
- the graph in Figure 7 represents the values of power filtering according to the secant static stiffness for different modes production of the sole of the invention (dotted frame) and for the anterior soles.
- the graphs in FIGS. 8A and 8B represent the variations of deflection as a function of the load applied for different modes of realization of the invention compared to anterior soles.
- the graphs in FIGS. 9A and 9B represent the variations in the tangential stiffness compared between the different embodiments of the invention and of the anterior soles.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Springs (AREA)
- Laminated Bodies (AREA)
- Vibration Dampers (AREA)
Description
- les figures 1B à 6 représentent des vues de dessus de divers modes de réalisation de la semelle de l'invention ;
- la figure 1A représente une vue en coupe transversale du mode de réalisation de la figure 1B ;
- la figure 7 est un graphe représentant les pouvoirs filtrants des modes de réalisation des figures 1B à 6 et ceux de semelles antérieures.
Claims (12)
- Semelle en élastomère pour le support d'un rail de chemin de fer sur une traverse, du type comprenant des faces supérieure (1a) et inférieure (1b) et au moins une cavité (10a) ménageant une zone périphérique d'appui (11) pour le patin de rail,
caractérisée en ce que la zone périphérique d'appui est plane et sa surface est comprise entre une et dix fois la surface de la paroi latérale interne (10a) de ladite cavité (10), de façon à ce que le rapport des raideurs sécantes prises respectivement entre des valeurs de charge statique de 20 et 100KN et des valeurs de surcharge dynamique de 20 et 80 KN, soit supérieur ou égal à 0,45. - Semelle selon la revendication 1, caractérisée en ce que ladite cavité (10) est localisée de telle sorte que le minimum de raideur soit situé sur l'axe médian (X) de la face supérieure (1a).
- Semelle selon la revendication 1 ou 2, caractérisée en ce que la paroi (10a) de ladite cavité (10) a des génératrices parallèles à la normale à la face supérieure (1a).
- Semelle selon l'une des revendications 1 à 3, caractérisée en ce que ladite cavité (10) est cylindrique et débouche sur la face inférieure (1b).
- Semelle selon l'une des revendications précédentes, caractérisée en ce que ladite cavité (10) a un axe de révolution et possède une paroi latérale interne (10a) à pourtour curviligne.
- Semelle selon la revendication 5, caractérisée en ce que le pourtour de ladite cavité (10) est ovale.
- Semelle selon l'une des revendications 1 à 4, caractérisée en ce que ladite cavité (10) a un contour polygonal.
- Semelle selon l'une des revendications précédentes, caractérisée en ce qu'elle est réalisée avec un matériau élastomère dont le module d'élasticité est sensiblement stable sur une plage de température comprise entre 0°C et 40°C.
- Semelle selon l'une des revendications précédentes, caractérisée en ce que la profondeur de ladite cavité (10) représente au moins 80% de l'épaisseur totale.
- Semelle selon l'une des revendications précédentes, caractérisée en ce que ladite cavité (10) est unique et centrée.
- Semelle selon l'une des revendications 1 à 9, caractérisée en ce qu'elle comporte six cavités.
- Semelle selon l'une des revendications précédentes, caractérisée en ce que son épaisseur est comprise entre 4 et 12 mm, et de préférence, entre 7 et 9 mm.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9906391A FR2793818B1 (fr) | 1999-05-20 | 1999-05-20 | Semelle en elastomere pour le support d'un rail de chemin de fer sur une traverse |
FR9906391 | 1999-05-20 | ||
PCT/FR2000/001344 WO2000071815A1 (fr) | 1999-05-20 | 2000-05-18 | Semelle en elastomere pour le support d'un rail de chemin de fer sur une traverse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1180174A1 EP1180174A1 (fr) | 2002-02-20 |
EP1180174B1 true EP1180174B1 (fr) | 2004-11-24 |
Family
ID=9545794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00931309A Expired - Lifetime EP1180174B1 (fr) | 1999-05-20 | 2000-05-18 | Semelle en elastomere pour le support d'un rail de chemin de fer sur une traverse |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1180174B1 (fr) |
AT (1) | ATE283392T1 (fr) |
AU (1) | AU4928900A (fr) |
DE (1) | DE60016199T2 (fr) |
FR (1) | FR2793818B1 (fr) |
WO (1) | WO2000071815A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2500660A (en) * | 2012-03-28 | 2013-10-02 | Tiflex Ltd | Rail pad |
UA118454C2 (uk) * | 2013-09-13 | 2019-01-25 | Швіхаг Аг | Система кріплення рейки |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2574439B1 (fr) * | 1984-12-06 | 1987-01-30 | Ressorts Ind | Semelle antivibratile pour la suspension d'un rail de chemin de fer et chausson de voie sans ballast comportant une telle semelle |
FR2630466B1 (fr) | 1988-04-22 | 1991-06-14 | Spencer Moulton Ste Fse | Semelle amortissante a base d'elastomere pour voie ferree |
DE4314578A1 (de) * | 1993-04-28 | 1994-11-03 | Udo Wirthwein | Elastische Schienenunterlage |
AT404607B (de) * | 1993-06-30 | 1999-01-25 | Porr Allg Bauges | Gleisoberbau mit schienen |
-
1999
- 1999-05-20 FR FR9906391A patent/FR2793818B1/fr not_active Expired - Fee Related
-
2000
- 2000-05-18 EP EP00931309A patent/EP1180174B1/fr not_active Expired - Lifetime
- 2000-05-18 DE DE60016199T patent/DE60016199T2/de not_active Expired - Lifetime
- 2000-05-18 AT AT00931309T patent/ATE283392T1/de active
- 2000-05-18 AU AU49289/00A patent/AU4928900A/en not_active Abandoned
- 2000-05-18 WO PCT/FR2000/001344 patent/WO2000071815A1/fr active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
AU4928900A (en) | 2000-12-12 |
WO2000071815A1 (fr) | 2000-11-30 |
DE60016199D1 (de) | 2004-12-30 |
ATE283392T1 (de) | 2004-12-15 |
FR2793818B1 (fr) | 2001-08-10 |
FR2793818A1 (fr) | 2000-11-24 |
EP1180174A1 (fr) | 2002-02-20 |
DE60016199T2 (de) | 2005-12-01 |
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