EP3733476A1 - Railway vehicle car - Google Patents

Abstract

Rail vehicle car comprising at least one frame (16), characterized in that the frame (16) delimits, as a sub-frame, at least one space (22,23) for receiving a ballast (14,15), the receiving space (22,23) comprising a sleeve (24), and the ballast (14,15) comprising a slide (28), the sleeve (24) and the slide (28) being complementary so that the sleeve (24) is configured to receive the slide (28) of the ballast (14,15).

Description

The present invention relates to a rail vehicle car.

It is known from the state of the art that in order to move on a railroad track, rail vehicle cars require sufficient traction force, depending on the mass of the vehicle and its grip on the track.

However, under certain conditions, a rail vehicle may exhibit a lack of adhesion to the track on which it is traveling. In traction, this results in the vehicle slipping on the track, complicating the acceleration of the vehicle. When braking, this results in the vehicle stalling on the track, and a greater braking distance. These two phenomena are not desirable.

The object of the invention is in particular to improve the grip of such a rail vehicle car, in a simple and rapid manner.

To this end, the invention relates in particular to a rail vehicle car comprising at least one chassis, characterized in that the chassis defines, as a sub-chassis, at least one space for receiving a ballast, the space of reception comprising a sheath, and the ballast comprising a slide, the sleeve and the slide being complementary so that the sleeve is configured to receive the slide of the ballast.

Thus, it is possible to quickly and simply install at least one ballast in the subframe of the car, making it possible to increase the mass of the car and, consequently, to increase the tractive effort when starting and when the car brakes, which improves grip.

• le châssis délimite quatre espaces de réception d'un lest respectif chacun ;
• les quatre espaces de réception d'un lest sont agencés deux à deux de part et d'autre d'une ligne médiane longitudinale séparant le châssis en deux moitiés longitudinales ;
• le châssis s'étend suivant une direction principale longitudinale, entre deux extrémités longitudinales, et ce châssis est propre à recevoir deux bogies, chaque espace de réception d'un lest étant disposés entre les deux bogies ;
• la voiture est une motrice de véhicule ferroviaire.

A rail vehicle car according to the invention may also include one or more of the following characteristics, taken alone or in any technically conceivable combination:

• the frame delimits four receiving spaces each with a respective ballast;
• the four spaces for receiving a ballast are arranged two by two on either side of a longitudinal median line separating the frame into two longitudinal halves;
• the frame extends in a main longitudinal direction, between two longitudinal ends, and this frame is suitable for receiving two bogies, each space for receiving a ballast being arranged between the two bogies;
• the car is a rail vehicle power unit.

The invention also relates to an assembly comprising a rail vehicle car according to the invention and at least one ballast having a slide complementary to the sleeve of the space for receiving the ballast, in which the slide of the ballast is received in the sleeve of the ballast. ballast reception area.

• le lest est fixé au châssis par des moyens de fixation comprenant des vis et des écrous ;
• le ou les lests présentent une masse totale cumulée comprise entre 5000 kg et 7000 kg.

An assembly according to the invention may also include one or more of the following characteristics, taken alone or in any technically conceivable combination:

• the ballast is fixed to the frame by fixing means comprising screws and nuts;
• the ballast (s) have a cumulative total mass of between 5,000 kg and 7,000 kg.

• la fourniture d'un ensemble selon l'invention, et
• l'introduction de la glissière du lest à l'intérieur du fourreau de l'espace de réception du lest.

The invention also relates to a method of ballasting a car of a railway vehicle, the method comprising:

• the supply of an assembly according to the invention, and
• the introduction of the ballast slide inside the sheath of the ballast receiving space.

According to a particular embodiment of the ballast method, the method comprises the use of a forklift to introduce the ballast slide inside the sheath of the ballast reception space.

• la Figure 1 représente schématiquement un ensemble comprenant une voiture de véhicule ferroviaire et quatre lests selon un mode de réalisation de l'invention ;
• la Figure 2 représente une vue agrandie de l'ensemble de la Figure 1 au niveau d'un lest.

The invention will be better understood on reading the description which will follow, given solely by way of example and made with reference to the appended figures in which:

• the Figure 1 schematically represents an assembly comprising a rail vehicle car and four ballasts according to one embodiment of the invention;
• the Figure 2 represents an enlarged view of the entire Figure 1 at the level of a ballast.

We have shown, on the figure 1 , an assembly 10 comprising a car 12 of a railway vehicle and four ballasts 14, 15.

In the remainder of the description, the terms “on” and “under” are understood to be relative to a normal orientation of a rail vehicle car, in a vertical direction.

Car 12 is suitable for traveling on a railway track (not shown).

Preferably, the car 12 is a power unit.

The car 12 comprises a chassis 16. The chassis 16 extends between two longitudinal ends 18, 19 in a main longitudinal direction L.

The frame 16 is for example made of metal.

Car 12 shown on figure 1 comprises two bogies 20. Each bogie 20 is arranged in a sub-frame near a longitudinal end 18, 19 of the frame 16. Each bogie has wheels 21.

The frame 16 defines, in a sub-frame, at least one space 22, 23 for receiving a ballast 14, 15.

In this way, it is possible to increase the grip of the rail vehicle car 12 when traveling on a railway track and therefore to increase the tractive force of the car 12 by adding at least one ballast 14. , 15.

Preferably, the frame defines four spaces 22, 23, each suitable for receiving a respective ballast 14,15. Two of these spaces 22, 23 are visible on the Figure 1 .

Preferably, the four spaces 22, 23 are identical.

The four spaces 22, 23 for receiving a ballast 14, 15 are arranged between the two bogies 20.

In this way, the car 12, when ballasted, exhibits stable dynamic behavior.

Preferably, the four spaces 22, 23 are arranged two by two on either side of a longitudinal center line separating the frame 16 into two longitudinal halves.

Preferably, the four spaces 22, 23 are arranged in pairs symmetrically with respect to the longitudinal center line.

For example, two spaces 22, 23 of the same longitudinal half are separated by a distance along the longitudinal direction L of between 0 and 5 meters. For example also, two spaces 22 symmetrical with respect to the longitudinal center line are separated by a distance between 0 and 3 meters.

As a variant, the frame delimits two spaces 22, 23, each suitable for receiving a respective ballast 14, 15.

An example of receiving space 22, 23 is shown in more detail on the figure 2 . As indicated above, the reception spaces 22, 23 being similar, only one of them will be described in detail below.

As can be seen on the Figure 2 , each receiving space 22, 23 comprises a sheath 24.

Sheath 24 typically has two pairs of L-shaped support members 26, two of a pair of support members 26 facing each other and being symmetrical with respect to a main direction of the sleeve, so that each pair of support elements 26 defines a space for receiving a slide 28.

The sheath 24 is for example made of metal.

Preferably, the sleeve 24 is made of the same material as the frame 16.

The sleeve 24 is configured to receive a ballast 14,15.

As visible on the Figure 2 , the ballast 14,15 comprises the slide 28 intended to be received in the reception space. To this end, the sleeve 24 and the slide 28 are complementary.

The slide 28 of the ballast 14,15 is then received in the sleeve 24.

The slide 28 is typically a T-shaped section whose branches bear on the support elements 26 of the sleeve 24.

When it is received in a space 22, each ballast 14,15 has for example, under the slide 28, a generally trapezoidal shape of constant thickness and forming three substantially right angles.

By “substantially right angle”, it is understood that the angle has a value between 85 ° and 95 °.

As a variant, the ballast 14,15 has any other suitable shape.

Each ballast 14,15 is for example made of metal, for example steel.

Preferably, the ballast (s) 14, 15 have a total cumulative mass of between 5000 kg and 7000 kg.

More preferably, the ballast (s) 14, 15 have a cumulative total mass of between 5950 kg and 6050 kg.

• Où : µ est un coefficient d'adhésion de la voiture 12,
• F_max est l'effort appliqué aux roues 21 de la voiture 12,
• m est la masse de la voiture 12,
• g est l'accélération de la pesanteur ;
• une augmentation de la masse de la voiture 12 de 84 tonnes à 90 tonnes permet une augmentation d'effort appliqué aux roues 21 de 280 kN à 300 kN, pour un coefficient d'adhésion constant de 34 %.

So, for example, by applying the following formula: $\mathit{\mu }=\frac{\mathit{Fmax}}{\mathit{m}\ast \mathit{g}},$

• Where: µ is a coefficient of adhesion of the car 12,
• F _max is the force applied to the wheels 21 of the car 12,
• m is the mass of car 12,
• g is the acceleration of gravity;
• an increase in the mass of the car 12 from 84 tonnes to 90 tonnes allows an increase in the force applied to the wheels 21 from 280 kN to 300 kN, for a constant adhesion coefficient of 34%.

In the example of Figures 1 and 2 , each of the four ballasts 14,15 has a mass of between 1250 kg and 1750 kg, preferably equal to 1500 kg.

Preferably, the ballast 14,15 is fixed to the frame 16, and in particular fixed to the support elements 26, by fixing means 30 comprising screws and nuts.

This makes it possible to secure the attachment of the ballast 14,15 to the car 12 when the car 12 is moving on a railway track.

A method of ballasting a car 12 of a railway vehicle according to the invention will now be described.

• la fourniture d'un ensemble 10 tel que décrit ci-dessus, et
• l'introduction de la glissière 28 du lest 14,15 à l'intérieur du fourreau 24 de l'espace 22,23 de réception du lest 14,15.

The process includes:

• the supply of a set 10 as described above, and
• the introduction of the slide 28 of the ballast 14,15 inside the sleeve 24 of the space 22,23 for receiving the ballast 14,15.

When the frame 16 defines a plurality of spaces 22,23 for receiving a respective ballast 14,15 each, the step of introducing the slide 28 of each ballast 14,15 inside the sleeve 24 of each space 22,23 for receiving a respective ballast 14.15 is repeated as many times as necessary depending on the number of ballast 14.15 desired.

Preferably, the method comprises the use of a forklift to introduce the slide 28 of the ballast 14,15 inside the sleeve 24 of the space 22,23 for receiving the ballast 14,15.

Each ballast 14,15 is then fixed to the frame 16 by the fixing means 30.

The installation of a plurality of weights on the car 12 is therefore simple and rapid, and can thus last less than an hour.

To remove the ballast 14,15, the means 30 for fixing the ballast 14,15 to the frame 16 are first removed.

Then, the slide 28 of the ballast 14,15 is slid out of the sleeve 24 in order to remove the ballast 14,15 from the receiving space 22,23.

Preferably, a forklift is used to remove the ballast 14,15 from the receiving space 22,23.

Claims (10)

Rail vehicle car (12) comprising at least one chassis (16),
characterized in that the frame (16) defines, as a sub-frame, at least one space (22,23) for receiving a ballast (14,15), the space (22,23) for receiving comprising a sheath (24), and the ballast (14,15) comprising a slide (28), the sleeve (24) and the slide (28) being complementary so that the sleeve (24) is configured to receive the slide (28) of the ballast (14.15). A railway vehicle carriage (12) according to claim 1, wherein the frame (16) defines four spaces (22,23) for receiving a respective ballast (14,15) each. Rail vehicle car (12) according to claim 2, in which the four spaces (22,23) for receiving a ballast (14,15) are arranged in pairs on either side of a longitudinal center line separating the frame (16) into two longitudinal halves. Rail vehicle car (12) according to any one of the preceding claims, in which the frame (16) extends in a longitudinal main direction (L), between two longitudinal ends (18,19), and this frame (16 ) being suitable for receiving two bogies (20), each space (22,23) for receiving a ballast (14,15) being arranged between the two bogies (20). A rail vehicle car (12) according to any preceding claim, the car (12) being a rail vehicle power unit. Assembly (10) comprising a rail vehicle car (12) according to any one of claims 1 to 5 and at least one ballast (14,15) having a slide (28) complementary to the sleeve (24) of the space ( 22,23) for receiving the ballast (14,15), in which the slide (28) of the ballast (14,15) is received in the sleeve (24) of the space (22,23) for receiving the ballast ( 14.15). Assembly according to claim 6, in which the ballast (14,15) is fixed to the frame (16) by fixing means (30) comprising screws and nuts. Assembly according to Claim 6 or 7, in which the ballast (s) (14,15) have a cumulative total mass of between 5000 kg and 7000 kg. A method of ballasting a rail vehicle car (12), the method comprising: - the supply of an assembly (10) according to any one of claims 6 to 8, and - the introduction of the slide (28) of the ballast (14,15) inside the sleeve (24) of the space (22,23) for receiving the ballast (14,15). A weighting method according to claim 9, the method comprising using a forklift to introduce the slide (28) of the weight (14,15) inside the sleeve (24) of the space (22,23). ) for receiving the ballast (14,15).

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