Damping arrangement for tracks

Abstract

A damping arrangement for tracks to be travelled over by rail vehicles having flanged wheels, including a) a rail, and b) an outer lateral profile of elastomer material which bears on the outer side of the rail at least in a region of a lateral outer rail head flank and in a region of an outer rail head underside, wherein the outer lateral profile has, in the region of the outer rail head underside and in the region of the lateral outer rail head flank, close to the rail, a soft region which is elastically resilient with respect to the rail head, and, in the region of the lateral outer rail head flank, remote from the rail, a substantially non-elastic hard region.

Claims

1. A damping arrangement for tracks to be travelled on by rail vehicles with flanged wheels, comprising a. a rail, with i. a rail head having an outer rail head lateral flank and an outer rail head lower face, ii. a rail web, iii. a rail foot, and iv. with an outer side facing away from the track interior, and b. an outer side profile of elastomeric material, the outer side profile having a section A that bears against the outer side of the rail along the outer rail head lateral flank, and along of the outer rail head lower face, and a section B that bears against the outer wall of the rail along the rail web, wherein the outer side profile has, in section A but not section B, near to the rail, a first section being elastically compliant against the rail head with cavities in the elastomeric material extending in a longitudinal direction of the outer side profile and forming longitudinal channels running parallel to the rail, and has, in the part of section A of the profile bearing against the outer side of the rail along the outer rail head lateral flank, remote from the rail, a solid region, and wherein the elastically compliant first region and the solid second region consist of the same elastomeric material.

2. The damping arrangement in accordance with claim 1, wherein the part of section A of the outer side profile profile bearing against the outer side of the rail along the outer rail head lateral flank has a larger cross-section than the part of section A of the outer side profile bearing against the outer side of the rail along the rail head lower face.

3. The damping arrangement in accordance with claim 1, wherein the part of section A of the outer side profile bearing against the outer side of the rail along the outer rail head lateral flank has a width W that corresponds at least to the maximum projection X of a wheel drum of a flanged wheel beyond the outer rail head lateral flank.

4. The damping arrangement in accordance with claim 1, wherein the cavities of the elastically compliant first region in the part of section A of the outer side profile bearing against the outer side of the rail along the outer rail head lateral flank are arranged in at least two rows in the horizontal direction.

5. The damping arrangement in accordance with claim 1, wherein the cavities are arranged such that webs extending through the elastically compliant first region in the direction transverse to the longitudinal direction of the outer side profile are formed from solid profile material.

6. The damping arrangement in accordance with claim 1, wherein the solid second region has an extent z that is greater than the extent y of the elastically compliant first region.

7. The damping arrangement in accordance with claim 1, with a rail designed as a grooved rail, wherein the rail head comprises a running rail with a running rail head, and a guide rail with a guide rail head and a guide rail flank pointing towards the track interior, together with a groove formed between the running rail and the guide rail, and wherein the damping arrangement further comprises an inner side profile of elastomeric material the inner side profile having a section A that bears against the inner side of the rail at least along the side of the running rail flank, and below the running rail, and a section B that bears against the inner side of the rail along the rail web, and wherein the inner side of the profile has, in its section A, but not in its section B, an elastically compliant region with caveties in the elastomeric material.

8. The damping arrangement in accordance with claim 7, wherein the cavities are arranged horizontally in two or more rows in the region at the side of the guide rail flank.

9. The damping arrangement in accordance with claim 1, wherein a. the outer and/or inner side profile consists of styrene-butadiene rubber (SBR), natural rubber (NR), a natural rubber-butyl rubber mixture (NR/BR), or of ethylene-propylene-diene copolymer (EPDM), and/or b. the cross-section of the outer and/or inner side profile reduces towards the rail foot, and/or c. the outer and/or inner side profile does not completely fill the respectively associated rail chamber, and/or d. the outer and/or inner side profile is in the form of a strip and can be applied onto the contour of the rail, and/or e. the outer and/or inner side profile is formed in one piece, and/or f. the outer and/or inner side profile has at least one creasing groove, and/or g. the outer and/or inner side profile essentially covers the side region of the rail completely, and/or h. the outer side profile has in its hard region an open-top recess for the accommodation of preferably electrical devices, and/or i. the outer and/or inner side profile, at least in the vicinity of the rail head, has tooth forms and/or fibres remote from the rail, via which tooth forms and/or fibres the outer and/or inner side profile can be connected in a force fit to a rigid surrounding material surrounding the damping arrangement j. the outer side profile with its upper surface extending transversely to the rail web lies essentially in the plane of the rail head surface to be travelled on by a wheel drum of a flanged wheel.

10. An outer side profile made of elastomeric material for a rail relating to tracks to be travelled on by rail vehicles with flanged wheels, wherein the rail has: i) a rail head having an outer rail head lateral flank and an outer rail head lower face, ii) a rail web, iii) a rail foot, and iv) an outer side facing away from the track interior, and wherein the outer side profile has a section A adapted to be applied to the outer side of the rail, along the outer rail head lateral flank, and along the outer rail head lower face, and a section B being adapted to be applied to the outer side of the rail along the rail web, and wherein the outer side profile has, in its section A, but not in its section B, a first region being elastically compliant against the rail head with cavities in the elastomeric material extending in a longitudinal direction of the outer side profile and forming longitudinal channels running parallel to the rail, the elastically compliant first region being located near to the rail when applied to the outer side of the rail, and has, in the part of its section A, and has in the part of section A to be applied to the outer rail head lateral flank, a solid second region located remote from the rail, and wherein the elastically compliant first region and the solid second region consist of the same elastomeric material.

11. The outer side profile in accordance with claim 10, wherein the solid second region has an extent z that is greater than the extent y of the elastically compliant first region in the part of section A of the profile applied to the outer rail head lateral flank.

12. The outer side profile in accordance with claim 10, wherein the cavities of the elastically compliant first region in the part of section A of the outer side profile to be applied against the outer side of the rail along the outer rail head lateral flank, are arranged in at least two rows in the horizontal direction, and/or the cavities of the elastically compliant first region are arranged in such a way that webs, running through the elastically compliant first region in the direction transverse to the longitudinal direction of the outer side profile, are formed from solid profile material.

13. The outer side profile in accordance with claim 10, wherein a. the outer side profile consists of styrene-butadiene rubber (SBR), natural rubber (NR), a natural rubber-butyl rubber mixture (NR/BR) or of ethylene-propylene-diene copolymer (EPDM), and/or b. the cross-section of the outer side profile reduces towards the end located on the rail foot, and/or c. the outer side profile does not completely fill the rail chamber in which the side profile is to be arranged; and/or d. the outer side profile is in the form of a strip and can be applied onto the contour of the rail, and/or e. the outer side profile is formed in one piece, and/or f. the outer side profile has at least one creasing groove, and/or g. the outer side profile essentially covers the outer side of the rail completely, and/or h. the outer side profile has in its hard region an open-top recess, for the accommodation of electrical devices, and/or i. the outer side profile has tooth forms and/or fibres remote from the rail, at least in the vicinity of the outer rail head lateral flank and in the vicinity of the outer rail head lower face, by way of which the outer side profile can be connected in a force fit to a rigid surrounding material.

Description

(1) In what follows the invention is explained in more detail for purely illustrative purposes, with the aid of the attached figures relating to preferred embodiments of the invention.

(2) FIG. 1 shows a damping arrangement in accordance with the prior art.

(3) FIG. 2 shows a sectional view of an embodiment of an inventive damping arrangement.

(4) FIGS. 3 to 7 show sectional views of further embodiments of an inventive damping arrangement.

(5) FIG. 1 shows a cross-sectional view of a part of a generic damping arrangement as known from the prior art. The figure shows the upper part of a rail 2 with a rail head 3, which here is designed as a grooved rail. A groove 38 is rolled into the rail head 3 so as to accommodate the flange 13 of a flanged wheel 12, for example a tram wheel. In this way, a running rail 33 and a guide rail 34 are formed, with the groove 38 located between them. The rail 2 is embedded in a rigid surrounding material 19, such as concrete or asphalt. The running rail 33 has a running rail head 35, the guide rail 34 has a guide rail head 36, a lateral guide rail flank 37 and a guide rail lower face 39. An outer side profile 18 essentially filling the outer rail chamber 21 is arranged on the outer side 6 of the rail 2, i.e. on the side of the rail 2 facing away from the track interior 11. A longitudinal rail encapsulation 17 of a suitable cast material has been introduced into a joint 45 milled into the rigid surrounding material 19. The figure also shows a part of a flanged wheel 12 located on the running rail 33 with a flanged wheel 13 and a wheel drum 14. The figure schematically shows various possible widths (in millimetres) of the wheel drum 14 of the prior art in the state of the art. The longitudinal rail encapsulation 17 serves, amongst other functions, as an expansion joint, and also serves to prevent the wheel drum 14 from running on the rigid surrounding material 19 in the event of increasing wear of the running rail 33. The width of the longitudinal rail encapsulation 17 is adapted to the width of the wheel drum 14 accordingly.

(6) FIG. 2 shows a cross-sectional view of an embodiment of an inventive damping arrangement 1. A rail 2 designed as a grooved rail is also shown here. On the outer side 6 of the rail, i.e. on the side of the rail 2 facing away from the track interior 11, an outer side profile 7 of elastomeric material is provided, which is in the form of a strip that does not completely fill the outer rail chamber 21. In this embodiment, the outer side profile 7 essentially has three sections A, B, C, which are separated here by creasing grooves 26. Section A of the outer side profile 7 is located in the region of the outer rail head lateral flank 31, and the outer rail head lower face 32, while section B is located in the region of the rail web 4, and section C is located on a part of the upper side of the rail foot 5 on the outer side 6 of the rail. A foot profile 25 made of elastomeric material, which surrounds the rail foot 5 from below, engages with the end of the outer side profile 7. The cross-section of the outer side profile 7 tapers in the direction of the rail foot 5. The outer side profile 7 is geometrically adapted to the shape of the rail 2 at the contact surface with the rail. The creasing grooves 26 ensure that the outer side profile 7 can be more easily applied onto the outer shape of the rail 2. In the region of the rail head 3, the cross-section of the outer side profile 7 widens. In the region of the rail head lower face 32 and the outer rail head lateral flank 31, the outer side profile 7 has a soft region 9 near to the rail that is elastically compliant against the rail head 3. Here the soft region 9 is produced, for example, by longitudinal oval cavities 15 in the cross-section of the elastomeric material of the outer side profile 7. The cavities 15 extend in the longitudinal direction of the outer side profile 7, i.e. in the direction perpendicular to the plane of the paper, and thus form longitudinal channels running parallel to the rail 2 in the outer side profile 7. In the example shown here of an inventive damping arrangement 1, the cavities 15 in the upper part of the soft region 9 are arranged in two rows in the horizontal direction. The cavities 15 located at the side of and below the rail head 3 have, for example, a width of 4-6 mm and a length of 10-20 mm. The cavities 15 are arranged such that continuous webs 46 of solid profile material are formed in the longitudinal direction of the outer side profile 7; these extend through the soft region 9 in the direction transverse to the longitudinal direction of the outer side profile 7 (see also FIG. 3). The webs 46 and the cavities 15 enable the horizontal and vertical movement of the rail 2 to be intercepted/dissipated without essentially compressing or moving the contact region relative to the surrounding material 19, not shown in this figure. Likewise, the horizontal multi-row arrangement of cavities 15, in particular in the region of the outer rail head lateral flank 31, intercepts the vertical movement in the direction of the outer edge of the outer side profile 7.

(7) In the region of the outer rail head lateral flank 31, a hard region 10 is provided in the outer side profile 7 remote from the rail, i.e. in the part of the outer side profile 7 located further from the rail 2. In the hard region 10, which in use forms the connecting region to the rigid surrounding material 19, the outer side profile 7 has a solid incompressible material cross-section. The dimensions of the hard region 10 can be, for example, at least 20×30 mm. This supports the connecting region, especially in the upper region, and prevents fractures and cracks. The arrangement of the cavities 15 ensures that the outer side profile 7 is very soft towards the rail 2, and very hard towards the rigid surrounding material 19.

(8) The width W of the outer side profile 7 in the vicinity of the outer rail head lateral flank 31 is at least equal to the width X of that part of the wheel drum 14 that projects beyond the outer rail head lateral flank 31. The width W is preferably at least slightly larger than the width X in order to prevent the wheel drum 14 of the flanged wheel 12 from running on the rigid surrounding material 19 in the event of increasing wear of the running rail head 35.

(9) The outer side profile 7 takes over entirely the task that the longitudinal rail encapsulation 17 has in the prior art, so that such longitudinal rail encapsulation 17 can be completely dispensed with.

(10) The outer side profile 7 with its upper surface 51 running transversely to the rail web 4 lies essentially in the plane of the rail head surface 50 to be travelled on by the wheel drum 14 of a flanged wheel 12, here the surface of the running rail head 35 of a grooved rail. The upper surface 51 also lies essentially in the plane of the surface of the surrounding material 19.

(11) In the embodiment of an inventive damping arrangement 1 shown here, an inner side profile 8 of elastomeric material is provided in the inner rail chamber 22, that is to say, in the rail chamber facing towards the track interior 11. The inner side profile 8 is also subdivided into three sections A, B, C, and is designed in the form of a strip adapted to the contour of the rail 2. Here, too, there are creasing grooves 26 so as to make it easier to adapt the inner side profile 8 to the contour of the rail 2. The inner side profile 8 also has a section that widens in cross-section towards the rail head 3. The inner side profile 8 is located on the rail 2 in the region to the side of the guide rail flank 37, in the region below the guide rail 34, in the region of the rail web 4, and on a part of the rail foot 5. The inner side profile 8 also engages with the foot profile 25. The inner side profile 8 has an elastically compliant soft region 16 in the elastomeric material in the region below the guide rail 34, that is to say, in the region below the guide rail lower face 39, and in the region to the side of the outer guide rail flank 37. Here too the soft region 16 here is implemented by means of cavities 48 in the profile material. Towards the upper end of the inner side profile 8 there is a hard region 47 above the soft region 16; here this is a solidly formed, essentially incompressible region of the inner side profile 8. Here too the cavities 48 of the soft region 16 located in the region of the guide rail flank 37 are arranged in two rows in the horizontal direction. The upper surface of the inner side profile 8 is essentially located in the plane of the upper surface of the guide rail head 36 and the surface of the adjacent surrounding material 19.

(12) In the contact region with the rigid surrounding material 19, the outer side profile 7 and the inner side profile 8 3 here have tooth forms 28 in the region of the rail head so as to establish a force-fit connection with the rigid surrounding material 19. The tooth forms 28 take the form of saw-tooth profiles of the profile surface. The embodiment shown here is provided with a welded joint collar 24 enveloping the foot profile 25 and the side profiles 7, 8 in the region of the rail web 4. A rubber film 27 covers the profile joint in the region of the welded joint collar 24 and serves to prevent the penetration of water. In addition, the damping arrangement 1 is arranged on undergrouting 23.

(13) FIG. 3 shows a cross-sectional view of an embodiment of the inventive damping arrangement 1 similar to that shown in FIG. 2, embedded in a rigid surrounding material 19, e.g. a concrete or asphalt pavement, which in turn is arranged on a concrete foundation 20. Here it is schematically indicated that the hard region 10 of the outer side profile 7 has an extent z that is greater than the extent y of the soft region 9. In addition, a detail on the left of the drawing, for illustrative purposes only, highlights solid profile regions that form webs 46.

(14) FIGS. 4 to 7 show further embodiments of an inventive damping arrangement 1, in which various modifications are shown with regard to the configuration of the profiles 7, 8, in particular the section A, for purposes of connection to the rigid surrounding material 19. In the embodiment shown in FIG. 4, for example, fibres 29 are provided instead of tooth forms 28; here these are embedded in the region of the rail head 3 by means of electrostatic flocking, with one end in the surface of the side profiles 7, 8, and with the other end in the rigid surrounding material 19. Needless to say, the embedding takes place during the casting of the rigid surrounding material 19, which can consist of concrete or asphalt, for example.

(15) In FIG. 5, steel sheets 30 are arranged to support the head region A of the side profiles 7, 8.

(16) FIG. 6 shows an embodiment in which a recess 41 is provided in the hard region 10 of the outer side profile 7, in which, for example, electrical elements, e.g. LEDs, or the like, can be accommodated. The recess 41 can be configured continuously in the longitudinal direction of the outer side profile 7, and form an open-top channel, or it can also be of a discontinuous design. Here a self-adhesive bitumen joint tape 40 is arranged in the lateral contact region with the surrounding material 19.

(17) FIG. 7A shows a cross-sectional view of an embodiment in which a groove 43 is formed at the edge of the hard region 10, in which a steel plate 42, with an edge region that matches the shape of the groove 43, and which is embedded in the surrounding material 19, is inserted to support the side profiles 7, 8 in the head region. This is particularly advantageous in abutting regions, that is to say, in regions where the strip-form side profiles 7, 8 abut against each other to form joints 44 (see the simplified spatial view shown in FIG. 7B).