Radially vertically machined rail and use thereof

Abstract

Rail possessing a head, a foot and a neck, wherein the neck connects the head to the rail foot. At the same time, the rail (11) possesses a radial vertical cutout in the foot (65) at least on one side of the foot (65), wherein the minimum value of the one-sided excess (K5) of the rail (11) foot (65) amounts to 0.1 of the width (P5) of the railway sleeper.

Description

[0001] Radially vertically machined rail and use thereof

[0002] The subject of the present invention is a radially vertically machined rail, in particular a railway rail, and a use thereof.

[0003] Rails, in particular railway rails, are known from the PN-EN 13674-1 standards in force which consist of a foot, a rail head and a neck with a minimum width of the neck. In particular, rails with a variable thickness of the neck and rails with a constant thickness of the neck are distinguished among the solutions currently used. A common peculiar feature of these solutions is the invariability of the cross-section of the rail over the entire length of the rail.

[0004] A method of producing rails is known from the descriptions of US762373A and S886349A in which a railway rail is shown with a similar appearance to the solutions currently used.

[0005] The document EA029813B1 discloses a railway rail possessing opening-shaped horizontal cut-outs and arc-like-shaped horizontal cut-outs made in order to reduce the weight of the rail.

[0006] The document RU2491381C1 discloses a railway rail possessing opening-shaped horizontal cut-outs made in order to reduce the weight of the rail.

[0007] Due to their shape and the thermal expansion inherent in steel, the railway rails currently used in practice, e.g. those described in the PN-EN 13674-1 standard, are susceptible to the phenomenon of a spontaneous release of thermal stresses, known as "rail stressing", especially in contactless railway tracks. Moreover, the rails currently used are characterized by their substantial weight. The solution described in RU2491381C1 does not take into consideration the positions and the dimensions of the railway sleepers in the arrangement of the horizontal cut-outs in the rail. This feature of the solution may result in heterogeneity of the stresses arisen in the rail that lead to a premature wear of the rail made acc. to this description. The solution described in EA029813B1 is characterized by the presence of horizontal cut-outs that interfere to a significant extent with the structure of the rail, which may give rise to the phenomenon of a notch that significantly reduces the strength of the rails made acc. to this description. Furthermore, this solution does not take into consideration the dimensions of the railway sleepers in the arrangement of the horizontal cut-outs in the rail. With a view to accommodating the problems described in the prior art, such as susceptibility of the rails to "rail stressing", an excessive weight of the rails and an unfavorable shape of the horizontal cut-outs, a solution was relating to a radially vertically machined rail.

[0008] The object of the present invention is to supply an improved radially vertically machined rail which will eliminate the inconveniences associated with the excessive weight of the rail and the susceptibility of the rail to the phenomenon of "rail stressing".

[0009] The essence of the present invention is to present a shape of the rail that is distinct from the existing solutions and that significantly improves the operational parameters of the rail, that is: to increase the resistance of the rail to "rail stressing"; to reduce the weight of the rail; to save the steel necessary to make the rail.

[0010] Preferably, the use of the present invention with respect to the prior art provides savings in the steel from which the rails are made, the weight of the rail is smaller, the thermal deformations of the rail associated with the phenomenon of thermal expansion in the use of a contactless track are smaller.

[0011] The subject of the present invention is a rail possessing a head, a foot and a neck, wherein the neck connects the head to the rail foot, at the same time the rail possesses at regular intervals radial vertical cut-outs in the foot at least on one side of the foot, wherein the minimum value of the one-sided excess of the rail foot amounts to 0.1 of the width of the railway sleeper.

[0012] Preferably, the radial vertical cut-out in the foot is on both sides of the foot.

[0013] Preferably, the radial vertical cut-out in the foot is on an inner side of the rail relative to a radius of the horizontal arc of the track.

[0014] The subject of the present invention is also a use of such a rail in sleepered railway tracks with a regular gauge of the railway sleepers.

[0015] The embodiments according to the present invention are visualized in the drawings in which

[0016] Fig. 1 shows a rail in a general view and sections, with two-sided radial cut-outs,

[0017] Fig. 2 shows the rail in the general view and the sections, with one-sided radial cut-outs,

[0018] Fig. 3 shows the sections of the rail in the area of the radial vertical cut-outs.

[0019] Example 1 Fig. 1, 2 and 3 show drawings of the radially vertically machined rail 11 the crosssection of which is variable along its length in a manner resulting from radial cut-outs with radii RQ, shown in Fig. 1, having been made by machining on this rail at regular intervals amounting to S5.

[0020] A simplified section, denoted as 15 in Fig. 1, of the rail with the radial cut-outs, made in the axis of symmetry of the railway sleeper marked as 2 in Fig. 1, is similar to a section of the rail described in the PN-EN 13674-1 standards. Similarly to the solutions known from the prior art, a rail 11 foot 65, neck 55 and head 45 may be distinguished herein. Simplified sections C4-C4, D4-D4 of Fig. 1 and E5-E5 of Fig. 2, made in the area of the radial vertical cut-outs, are shown in Fig. 3.

[0021] Fig. 1 shows the standardized rail (11) in a cross-section. The rail (11) has dimensions typical of standard railway rails (it meets the requirements of the PN-EN 13674-1 standard), i.e. the total height of 149 mm (for the rail 49E1), 172 mm (for the rail 60E1), the width of the foot (65) is 125 mm (for the rail 49E1), 150 mm (for the rail 60E1). The rail is produced from, among others, carbon-manganese steel R260 or R350 HT.

[0022] Over the entire length of the rail (11), the radial cut-outs with the radius RQ were made by machining at regular intervals amounting to S5, on both sides of the foot (65). The radius (RQ) of the cut-out amounts to 610 mm (in the case of the gauge of the sleepers amounting to 0.6 m or 1400 mm (in the case of the gauge of the sleepers amounting to 0.8 m). The minimum value of the one-sided excess (K5) of the rail (11) foot (65) in the areas of the cut-outs amounts to 0.1 of the width (P5) of the railway sleeper which has a width of 160 mm at the location where the rail is supported. The minimum width (G) of the rail (11) neck (55) is no smaller than the value acc. to PN-EN 13674-1.

[0023] Example 2

[0024] Fig. 2 shows the rail (11) along the entire length of which, at regular intervals amounting to S5, the radial cut-outs were made by machining on an inner side of the foot (65) relative to a radius direction of the arc of the track (RT). The radius (RJ) of the cut-out amounts to 610 mm (for the case where the gauge S5 of the sleepers amounts to 0.6 m) or 1400 mm (for the case where the gauge S5 of the sleepers amounts to 0.8 m). The minimum value of the onesided excess (K5) of the rail (11) foot (65) amounts to 0.1 of the width (P5) of the railway sleeper (that is, min. K5 = 0.1 of P5) which has a width P5 amounting to 160 mm at the location where the rail is supported. The minimum width (G) of the rail (11) neck (55) is no smaller than the value acc. to PN-EN 13674-1. The rail with the radial cut-outs is intended for use in sleepered tracks with a regular gauge of the sleepers, denoted as S5 in the axes of symmetry of the sleepers in Fig. 1 and Fig. 2.

[0025] It is preferable to use radial cut-outs, as this shape of the cut-out minimizes the occurrence probability of the phenomenon of a notch. It is preferable to use a rail with radial vertical cut-outs made on both sides on the rail foot, as in Fig. 1.

[0026] On the segments of curvatures, arcs and transition curves of the railway track, it is preferable to use a rail with radial vertical cut-outs made on one side on the rail foot, on the inner side of the rail foot relative to the radius direction of the arc of the track RT, in accordance with Fig. 2.

[0027] The rail 11 with the radial cut-outs is made by radial machining effected on an existing finished product, by way of example, on the one described in the PN-EN 13674-1 standards, while maintaining the relationship shown in Fig. 1 and Fig. 2, and relating to the minimum value of the one-sided excess K5 of the rail 11 foot 65 from the railway sleeper 25 (that is, min. K5 = 0.1 P5). The value of the radius of the cut-out RQ results from the aforementioned relationship and from the circumstances shown in Fig. 1. The value of the radius of the cut-out RJ results from the aforementioned relationship.

[0028] The present invention finds use in the railway industry, and especially in the construction of railed railway tracks, especially in a contactless track.

[0029] List of reference signs:

[0030] 11 - radially vertically machined railway rail,

[0031] 15 - simplified section of the radially vertically machined railway rail, made outside the area of machining, i.e., in the axis of symmetry of railway sleeper 25,

[0032] 25 - railway sleeper for the rail 11,

[0033] F5 - axis of symmetry of the railway sleeper 25,

[0034] S5 - gauge of the railway sleepers 25 in the axes of symmetry F5 for the radially vertically machined rail,

[0035] 34 - arcuate surface created as a result of radial cut-out with radius RQ,

[0036] 35 - arcuate surface created as a result of radial cut-out with radius RJ,

[0037] 45 - radially vertically machined rail head,

[0038] 55 - radially vertically machined rail neck,

[0039] 65 - radially vertically machined rail foot,

[0040] C4 - C4 characteristic section of the radially vertically machined rail,

[0041] D4 - D4 characteristic section of the radially vertically machined rail,

[0042] E5 - E5 characteristic section of the radially vertically machined rail,

[0043] G - minimum width of the radially vertically machined rail neck,

[0044] K5 - magnitude of one-sided excess (overhang) of the rail foot from the railway sleeper,

[0045] P5 - width of the railway sleeper for the radially vertically machined rail,

[0046] RQ - radii of the cut-outs created as a result of two-sided radial vertical machining,

[0047] RJ - radius of the cut-out created as a result of one-sided radial vertical machining,

[0048] RT - radius direction of the horizontal arc of the railway track.

Claims

Claims1. A rail possessing a head, a foot and a neck, wherein the neck connects the head to the rail foot, characterized in that the rail (11) possesses a radial vertical cut-out in the foot (65) at least on one side of the foot (65), wherein the minimum value of the one-sided excess (K5) of the rail (11) foot (65) amounts to 0.1 of the width (P5) of the railway sleeper.

2. The rail according to claim 1, characterized in that the radial vertical cut-out in the foot (65) is on both sides of the foot (65).

3. The rail according to claim 1, characterized in that the radial vertical cut-out in the foot (65) is on an inner side of the rail (11) relative to a radius direction of the horizontal arc of the track (RT).

4. A use of the rail as set out in claims 1 to 3 in sleepered railway tracks with a regular gauge of the railway sleepers.

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