WO2018193349A1

WO2018193349A1 - Anti-rolling bar for a carrying bogie of a railway vehicle, carrying bogie provided with such an anti-rolling bar, and railway transport vehicle comprising such carrying bogies

Info

Publication number: WO2018193349A1
Application number: PCT/IB2018/052592
Authority: WO
Inventors: Eliane Allain; Romain CROUE
Original assignee: Sncf Mobilités
Priority date: 2017-04-21
Filing date: 2018-04-13
Publication date: 2018-10-25
Also published as: FR3065427A1; FR3065427B1

Abstract

The invention relates to an anti-rolling bar (25, 26) for a carrying bogie (12) of a railway vehicle comprising a main shaft intended for being mounted on said bogie in a direction, referred to as transverse direction, perpendicular to the direction of movement of said railway vehicle, characterised in that it also comprises at least one aerodynamic deflector (32, 33) mounted on said main shaft and configured to allow, during the movement of said railway vehicle, a modification of the characteristics of the flow of air next to the anti-rolling bar. The invention also relates to a carrying bogie of a railway vehicle provided with at least one anti-rolling bar according to the invention.

Description

ANTI-ROLL BAR FOR BOGIE CARRIER OF A RAIL VEHICLE, BOGIE CARRIER EQUIPPED WITH SUCH ANTI-ROLL BAR, AND RAILWAY TRANSPORT VEHICLE

INCLUDING SUCH BEARING BOGIES

1. Technical field of the invention

The invention relates to an anti-roll bar for a bogie carrier. The invention also relates to a bogie carrying at least one body of a railway vehicle, in particular a railway vehicle intended to travel at high speed on dedicated traffic lanes, equipped with such an anti-roll bar. The invention also relates to a rail transport vehicle comprising such carrier bogies.

2. Technological background

A rail transport vehicle, and in particular a vehicle intended to run at high speed on a dedicated lane, is sensitive to climatic conditions, especially during snow periods.

It is indeed common for rail transport vehicles to suffer more damage during snowy periods than the rest of the year. These damages are binding for the management of the operation of the network and frequently lead to a sharp slowdown in traffic. This damage to vehicles not only causes an immediate slowdown in traffic but also an increase in the number of vehicles that are unavailable in the days or weeks following these snow periods, depending on the repairs and / or cleanings that must be carried out on the vehicles. in maintenance workshops.

The origin of the damage on the trains during the winter periods is mainly related to the appearance of ballast projections due to the fall of blocks of snow or ice accumulated under the trains. Snow or ice accumulation areas under vehicles depend on both the underbody airflow and the body geometry. The inventors have sought to provide a technical solution to limit the damage associated with the presence of snow or ice on railway transport vehicles and / or on the roadways of rail vehicles.

During these investigations, the inventors realized that the bogie cavities and the breaks between the crates of a railway vehicle are the areas of the train where snow accumulation is particularly important. Indeed, these areas are places of strong air recirculation and air suction phenomena by the breaks that bring up the air and snow particles from the bottom of the body to the upper parts of the train, and cause deposits of snow and dirt in the bogie cavities and hyphenation.

The inventors have therefore sought a technical solution to control air recirculation and air aspiration phenomena at the bogie cavities and hyphenation between the boxes so as to limit the accretion of snow under the train.

3. Objectives of the invention

The invention aims to provide a rail vehicle that limits the accretion of snow or ice under the vehicle.

The invention also aims to provide a bogie carrier of a rail vehicle, which allows, once mounted on a rail vehicle, to limit the accretion of snow on the vehicle during snowy periods.

The invention also aims to provide an anti-roll bar which, once mounted on a bogie carrying a rail vehicle, to limit the accretion of snow on the vehicle during snowy periods.

The invention also aims to provide, in at least one embodiment, an anti-roll bar, a bogie carrier and a railway vehicle, which limit snow accretions snowy period without requiring significant structural changes.

The invention also aims to provide, in at least one embodiment, an anti-roll bar, a bogie carrier and a railway vehicle, which contribute to reducing aerodynamic drag so that the overall energy consumption of the vehicle is reduced compared to vehicles of the prior art. The invention also aims to provide, in at least one embodiment, an anti-roll bar, a bogie carrier and a rail vehicle, which contribute to reducing the noise of aerodynamic origin of railway vehicles of the prior art. 4. Presentation of the invention

To do this, the invention relates to a stabilizer bar for bogie carrying a railway vehicle comprising a main shaft intended to be mounted on said bogie in a direction, said transverse direction, perpendicular to the direction of movement of said railway vehicle.

An anti-roll bar according to the invention is characterized in that it further comprises at least one aerodynamic deflector mounted on said main shaft and configured to allow, during the displacement of said railway vehicle, a modification of the characteristics of the flow of air in the vicinity of the anti-roll bar.

An anti-roll bar is a member of a railway vehicle which is mounted on a bogie and whose main function is to limit the rolling of the vehicle, that is to say the rotational movement about the longitudinal axis of the vehicle. An anti-roll bar also helps to define the behavior of the vehicle when cornering.

The inventors have realized that an anti-roll bar of a railway vehicle is an organ which is arranged in the vicinity of the ground and which is therefore highly exposed to soiling and accretion of snow from the ballast in winter.

The inventors therefore had the idea of providing the anti-roll bars with a new and additional functionality by mounting on the main shaft of the anti-roll bar at least one aerodynamic deflector. This baffle is configured to change the characteristics of the air flow in the vicinity of the anti-roll bar. In particular, the deflectors are configured to change the orientation and / or the speed of the air flow in the vicinity of the location. This modification of the characteristics of the air flow in the vicinity of the anti-roll bar thus makes it possible to control the air trajectory and therefore to limit the snow block formation zones in the vicinity of the bar. anti-roll, and thus to prevent, or greatly reduce, the areas of snow accretion around the carrier bogie on which the antiroll bar is formed.

In addition, the deflectors anti-roll bars reduce areas of turbulence and air suction phenomena.

The baffles also reduce aerodynamic drag around the carrier bogies and therefore contribute to reducing the overall energy consumption of the railway vehicle.

Finally, the deflectors contribute to reducing the noise of aerodynamic origin around the carrying bogies or in the gap zones between the crates of a railway vehicle.

Advantageously and according to the invention, the anti-roll bar comprises two aerodynamic deflectors arranged respectively in the vicinity of each end of the main shaft.

According to this aspect of the invention, the anti-roll bar comprises two deflectors arranged in the vicinity of each end of the main shaft of the bar. Thus, once the bar mounted transversely on the bogie carrier, the deflectors extend in the vicinity of each lateral end of the antiroll bar and allow to modify the characteristics of the air flow on a portion of the antiroll bar. The baffles do not cover the entire bar so as to avoid any contact with other parts carried by the bogie carrier.

Advantageously and according to the invention, at least one deflector - in particular each deflector - has an elliptical profile.

According to this aspect of the invention, a deflector has an elliptical profile, which allows to form continuous and progressive deflection surfaces. The elliptical shapes can be elongated so as to avoid an upward flow between the different anti-roll bars of the carrier bogie.

The invention also relates to a bogie carrying at least one body of a railway vehicle extending along a longitudinal direction, said bogie comprising a chassis, two axles each connected to the wheels of the vehicle, a load crossbar mounted on said frame and adapted to support said box. A carrier bogie according to the invention is characterized in that it further comprises at least one anti-roll bar according to the invention, extending transversely on either side of said frame.

Thus, a carrier bogie according to the invention has the various advantages described in connection with the anti-roll bar according to the invention.

Advantageously and according to the invention, the bogie comprises two anti-roll bars extending transversely on either side of said frame, each anti-roll bar being equipped with at least one aerodynamic deflector.

Advantageously and according to the invention, each antiroll bar comprises two aerodynamic deflectors arranged respectively in the vicinity of each end of the main shaft of said antiroll bar.

Advantageously and according to the invention, the baffles of each antiroll bar are arranged facing one another.

Advantageously and according to the invention, each deflector has an elliptical profile and the baffles are oriented on each anti-roll bar so as to form a symmetrical truncated V allowing said baffles to modify the characteristics of the air flow in the vicinity of the anti-roll bars in both directions of circulation of the railway vehicle.

According to this aspect of the invention, the baffles are mounted on the anti-roll bars so as to form a symmetrical V such that the modification of the air flow resulting from the presence of the baffles on the anti-roll bars is effected in both directions of circulation of the railway vehicle.

Advantageously and according to the invention, each deflector of elliptical shape is bevelled so as to have flat faces at each of its longitudinal ends.

Advantageously and according to the invention, the carrier bogie is configured to carry the two ends of two consecutive boxes of said railway vehicle so that it is arranged at the right of a break formed by the space between said two boxes of said vehicle.

According to this aspect of the invention, the anti-roll bars equipped with deflectors contribute to limiting the rise of air in the breaks formed by the space between the boxes of the vehicle, and thus to limit the areas of soiling in this space. In other words, the deflectors anti-roll bars prevent or greatly reduce the effect "chimney" formed by these breaks, by deflecting the flow of air to the bottom of the box and not to the space formed between the boxes .

The invention also relates to a railway transport vehicle intended to circulate on a taxiway comprising at least one bogie carrier and at least one body carried by said bogie carrier, characterized in that said bogie carrier is a bogie according to the invention.

Thus, a vehicle according to the invention has the various advantages described in connection with the bogie carrier and the anti-roll bar according to the invention.

In particular, according to the invention, the aerodynamic performance of the vehicle is improved by the arrangement of deflectors on the anti-roll bars of the vehicle carrying bogies. The baffles are used to modify the characteristics of the air flow in the vicinity of the anti-roll bars. This control of the air flow is obtained without requiring an external energy supply. In addition, the improved performance is obtained without the need for the addition of faired elements surrounding the equipment likely to disturb the aerodynamic performance of the vehicle.

The invention also relates to an anti-roll bar, a bogie carrier and a railway vehicle characterized in combination by all or some of the characteristics mentioned above or below.

5. List of figures

Other objects, features and advantages of the invention will become apparent on reading the following description given solely by way of non-limiting example and which refers to the appended figures in which:

FIG. 1 is a schematic view of a railway vehicle according to one embodiment of the invention,

FIG. 2 is a partial schematic view from below of the railway vehicle of FIG. 1 on which a carrier bogie can be observed according to one embodiment of the invention, FIG. 3 is a schematic perspective view of an anti-roll bar according to one embodiment of the invention;

FIG. 4 is a diagrammatic side view of a carrier bogie according to one embodiment of the invention integrating the anti-roll bar according to the embodiment of FIG. 3,

- Figure 5 is a schematic sectional view of the bogie carrier according to the embodiment of the invention of Figure 4.

6. Detailed description of an embodiment of the invention

Figures, scales and proportions are not strictly adhered to for the purpose of illustration and clarity. Throughout the detailed description which follows with reference to the figures, unless otherwise indicated, each element of the anti-roll bar, the bogie carrier and the vehicle is described as it is arranged when the railway vehicle is in circulation on a horizontal taxiway. extending along a direction, said longitudinal direction. This arrangement is shown in FIG.

In addition, identical, similar or similar elements are designated by the same references in all the figures. Finally, the terms longitudinal, transverse and vertical are used in a nonlimiting manner with reference to the trihedron L, T, V as shown in FIG. 2. The longitudinal direction corresponds to the main direction of movement of the vehicle on a dedicated lane and the transverse direction corresponds to the main direction of the anti-roll bar, once mounted on the bogie carrying the railway vehicle of FIG. 1.

A railway transport vehicle comprises in known manner at least one power unit 8 and a plurality of cars connected and articulated to each other and towed by the power unit 8. In FIG. 1, only the power unit 8 and the first two cars 9, 10 are represented for clarity.

In operation, the rail transport vehicle moves on rails 11 along the longitudinal direction.

Cars 9 and 10 include crates that rest on bogies carriers 12.

Figure 2 is a partial schematic view of the underside of the rail vehicle of Figure 1 on which can be observed the carrier bogie 12 equipped with anti-roll bars 25, 26 according to the invention.

The bogie carrier 12 is arranged astride the two boxes 9, 10 of the railway vehicle. It therefore carries both ends of the two boxes 9, 10 consecutive so that it is arranged at the right of a break 15 formed by the space between the two boxes 9, 10 of said vehicle.

The bogie carrier 12 comprises a frame 16, two axles 17, 18 each connected to the wheels 19 of the vehicle, a load crossbar 20 mounted on the frame 16 and adapted to support the ends of the boxes 9, 10.

The carrier bogie 12 further comprises two anti-roll bars 25, 26 which each extend transversely on each side of the frame 16. The anti-roll bars 25, 26 are mounted on the bogie carrier 12 by any means known to man of career.

Each anti-roll bar 25, 26 is preferably in accordance with the anti-roll bar shown diagrammatically in FIG.

This bar comprises a main shaft 31, which is for example formed of a forged steel tube and having a coefficient of elasticity determined so as to compensate for the roll movements of the railway vehicle during bends.

The main shaft 31 also carries two aerodynamic deflectors 32, 33 mounted on the main shaft 31 in the vicinity of each end of the main shaft 31 and configured to allow, during the movement of the railway vehicle, a modification of the characteristics of the the flow of air in the vicinity of the anti-roll bar 25.

Each deflector 32, 33 has an elliptical profile so as to reduce the angle of impact of the air and any snow particles on the baffle and to deflect the flow of air to the ballast.

The deflectors 32, 33 can be mounted on the anti-roll bars by any known means. Thus, according to one embodiment, the deflectors present a central opening shaped to the main shaft 31 so as to be slidably mounted on the shaft along the main shaft from one end of the main shaft, to the final position of the deflector the along the main shaft 31. The locking of the baffles in position on the shaft can be done either by side collars, or by pins which are housed in the main shaft 31, or by gluing, welding, or all equivalent means.

According to another embodiment, the baffles are formed of two half-shells which are assembled to one another after being positioned around the main shaft 31. The assembly of the two half-shells can be obtained by screwing, gluing, welding, or any equivalent means.

According to another embodiment, the main shaft and the baffles are formed in one piece.

The deflection of the air resulting from the presence of the deflectors on the main shaft of an anti-roll bar is schematically represented in FIG. 4 by the arrows 40, 41.

In this figure, the arrow referenced D symbolizes the direction of movement of the railway vehicle. Also the flow of air in the vicinity of the ground, which in the absence of anti-roll bars 25, 26 according to the invention, would tend to rise in the break 15 formed by the space between the boxes 9, 10, is deflected towards the ground along the arrow referenced 40 by the deflectors of the first antiroll bar 25, then back to the ground along the arrow referenced 41 by the deflectors of the second antiroll bar 26.

Furthermore, the deflectors of the anti-roll bars 25, 26 being arranged to form a truncated V, which is apparent in FIG. 5, make it possible to ensure this deflection of the air flow regardless of the direction of movement of the railway vehicle. If the vehicle moves in the direction of reverse movement in the direction indicated by the arrow D, the deflection of the airflow follows the reverse path to that described above. In other words, the air is first deflected towards the ground by the deflectors of the anti-roll bar 26, then again by the deflectors of the anti-roll bar 25, which prevents air and any snow particles. transported by the snow back up towards hyphenation 15.

The orientations of the deflectors 32, 33 of the anti-roll bars 25, 26 are advantageously chosen so that the inclination of the deflectors relative to the horizontal maintains a template under the box complies with the standards in force. In other words, in practice, the inclination is small enough that the distance in the vertical direction between the ends of the baffles and the ground is at least equal to the minimum distance allowed.

Depending on the initial gauge of the train, the inclination of the deflectors on the anti-roll bars can be adapted to comply with the standards in force.

The invention is particularly intended for vehicles traveling at high speed on a dedicated lane, such as a TGV® train, but it can of course also apply to all types of railway vehicles confronted with snow accretion problems in winter, turbulence and aerodynamic performance.

Claims

1. Anti-roll bar for bogie carrier (12) of a railway vehicle comprising a main shaft (31) intended to be mounted on said carrier bogie

(12) in a direction, said transverse direction, perpendicular to the direction of movement of said railway vehicle, characterized in that it further comprises at least one aerodynamic deflector (32, 33) mounted on said main shaft (31) and configured to allow, during the movement of said railway vehicle, a change in the characteristics of the air flow in the vicinity of the anti-roll bar.

2. anti-roll bar according to claim 1, characterized in that it comprises two aerodynamic baffles (32, 33) respectively arranged in the vicinity of each end of said main shaft (31).

3. antiroll bar according to claim 2, characterized in that at least one aerodynamic deflector (32, 33) has an elliptical profile.

4. A bogie carrying at least one box (9, 10) of a railway vehicle extending along a longitudinal direction, said bogie comprising a chassis (16), two axles (17, 18) each connected to the wheels (19) of the vehicle, a load crossbar (20) mounted on said frame (16) and adapted to support said box (9, 10), characterized in that it further comprises at least one anti-roll bar (25, 26) according to one of claims 1 to 3, extending transversely on either side of said frame (16).

5. Bogie according to claim 4, characterized in that it comprises two anti-roll bars (25, 26) extending transversely on either side of said frame (16), each anti-roll bar (25, 26) being equipped with at least one aerodynamic deflector (32, 33).

6. Bogie according to claim 5, characterized in that each anti-roll bar (25, 26) comprises two aerodynamic baffles (32, 33) respectively arranged in the vicinity of each end of its main shaft (31).

Bogie according to claim 6, characterized in that the deflectors aerodynamics (32, 33) of each antiroll bar (25, 26) are arranged facing each other.

Bogie according to claim 7, characterized in that each aerodynamic deflector (32, 33) has an elliptical profile and that the aerodynamic deflectors (32, 33) are oriented on each antiroll bar (25, 26) so as to forming a symmetrical truncated V enabling said aerodynamic deflectors (32, 33) to modify the characteristics of the air flow in the vicinity of the antiroll bars (25, 26) in both directions of circulation of the railway vehicle.

9. Bogie according to claim 8, characterized in that each aerodynamic deflector (32, 33) of elliptical shape is bevelled so as to have flat faces at each of its longitudinal ends.

Bogie according to one of Claims 4 to 9, characterized in that it is configured to carry the two ends of two consecutive boxes (9, 10) of a railway vehicle so that it is arranged at the right a break (15) formed by the space between said two boxes (9, 10) of said vehicle.

11. A rail transport vehicle intended to circulate on a taxiway comprising at least one bogie carrier (12) and at least one box (9, 10) carried by said bogie carrier (12), characterized in that said bogie carrier ( 12) is a bogie according to one of claims 4 to 10.