Rail vehicle car including a ventilation system

Abstract

Railway vehicle car comprising a ventilation system The present invention relates to a railway vehicle car (10) extending along a longitudinal direction (X-X'), and comprising: - a vehicle body defining a compartment (32) to be ventilated; - a roof hood (26) disposed on the body, comprising two side walls (28) and a top wall (30) disposed between the two side walls (28); and - a ventilation system (34) for said compartment (32) defining an airflow inlet duct to the compartment (32), between an air inlet (40) provided in one of the side walls (28) and the compartment (32), and an outlet duct extending between the compartment (32) and an air outlet (42) provided in the upper wall (30), the air inlet (40) and the air outlet (42) being separated from each other in the longitudinal direction (X-X'). Figure for the abbreviation: Figure 1

Description

Title of the invention: Railway vehicle car comprising a ventilation system

[0001] The present invention relates to a railway vehicle car.

[0002] Such a car includes, for example, electrical and electronic equipment which needs to be cooled.

[0003] For this purpose, it is known to circulate fresh air from outside the car in the car, which heats up on contact with the various equipment and which is then expelled from the car.

[0004] Conventionally, fresh air is drawn onto the roof of the car and hot air is expelled under the car chassis, towards the rails.

[0005] However, discharging hot air at the bottom presents the risk of introducing dirt into the car. Indeed, the proximity to the bogie, the brake discs which reject brake dust and the wheels which can project mud, leads to a risk that this various dirt passes through the air outlet to go back up into the vehicle car.

[0006] An aim of the invention is therefore to propose a ventilation system making it possible to ensure effective ventilation while limiting the risk of dirt being introduced into the car.

[0007] To this end, the invention relates to a railway vehicle carriage extending along a longitudinal direction parallel to the direction of movement of the vehicle, and comprising:

[0008] - a vehicle body defining at least one compartment to be ventilated; - a roof cover arranged on the body, the roof cover comprising two side walls and an upper wall arranged between the two side walls; and - a ventilation system for said compartment defining:

[0009] + an inlet duct for an air flow towards the compartment, between at least one inlet air provided in one of the side walls and the compartment, and

[0010] + an outlet duct extending between the compartment and an air outlet provided in the upper wall,

[0011] the air inlet and the air outlet being spaced apart from each other in the longitudinal direction.

[0012] Thus, the air inlet and the air outlet are arranged on the roof of the car in order to avoid any risk of dirt rising into the compartment. In addition, recirculation of the outgoing hot air is avoided due to the separation of the air inlet and the the air outlet in the longitudinal and transverse directions.

[0013] According to particular embodiments, the railway vehicle car comprises one or more of the following optional characteristics:

[0014] - the ventilation system comprises two air inlets each arranged on a respective side wall;

[0015] - the air inlet and the air outlet are separated by a distance in the longitudinal direction tudinal greater than 50 cm, preferably 1 meter;

[0016] - the car comprises two ends in the longitudinal direction, the com compartment to be ventilated being arranged in the vicinity of one of the two ends, each air inlet being further from said end than the air outlet in the longitudinal direction;

[0017] - said end is suitable for being connected directly to a driving car of the railway vehicle;

[0018] - the roof hood defines an internal volume separated from the compartment by a roof of the body, the roof cover further comprising a partition wall arranged in the internal volume and separating the internal volume into an inlet space and an outlet space, each air inlet opening into the inlet space and each air outlet opening into the outlet space;

[0019] - the ventilation system further comprises a filtering system for filtering air between each air inlet and the compartment;

[0020] - the car comprises a bogie supporting the body, the compartment to be ventilated being located above the bogie;

[0021] - the side walls and the top wall define an external envelope, the ventilation system being arranged inside the external envelope;

[0022] - the ventilation system is capable of operating passively for the cir air flow regulation during the movement of the railway vehicle.

[0023] The invention will be better understood on reading the following description, given solely by way of example, and made with reference to the appended drawings, in which:

[0024] - [Fig.l] [Fig.l] is a schematic side view of a railway vehicle comprising a car according to the invention;

[0025] - [Fig.2] [Fig.2] is a top view of part of the roof of the car according to the invention of [Fig.l];

[0026] - [Fig.3] [Fig.3] is a perspective view of part of the ventilation system of the vehicle according to the invention of [Fig.l].

[0027] In the description, the terms "horizontal", "vertical", "up", "down", "upper" and "lower" are defined relative to a direction of elevation of a railway vehicle when arranged on rails.

[0028] The longitudinal direction X-X' is defined by the direction of travel of the vehicle railway and the transverse direction Y-Y' is the direction substantially perpendicular to the longitudinal direction and the elevation direction of the railway vehicle.

[0029] A railway system 2 comprising a railway infrastructure 4 and a railway vehicle 10 is illustrated in [Fig.l].

[0030] The railway infrastructure 4 comprises rails 6 and a catenary 8.

[0031] The catenary 8 is an electrical power supply device suspended above the rails 6 and consists of one or two electrically conductive contact wires and carrier cables.

[0032] As visible in [Fig.l], the railway vehicle 10 comprises at least one passenger and / or goods transport car 12, a head car 14 and a tail car 16 located at the opposite end of the head car 14.

[0033] The vehicle 10 further comprises at least one pantograph 18 arranged on one of the cars 12, 14, 16. The pantograph 18 is an articulated device configured to capture an electric current by friction on the catenary 8.

[0034] Each car 12, 14, 16 extends in the longitudinal direction X-X' and has two longitudinal ends.

[0035] The vehicle 10 comprises bogies 20. Each bogie 20 supports a car 12, 14, 16 resting on this bogie 20 or supports two neighboring cars 12, 14, 16 resting by their neighboring longitudinal ends on this bogie 20 (this is then referred to as a “common bogie”). Here, as visible in [Fig.l], each car 12, 14, 16 is supported by two bogies 20 each arranged close to a longitudinal end of the car 12, 14, 16.

[0036] Each bogie 20 comprises wheels for rolling on the rails 6 and thus allowing the movement of the railway vehicle 10 along the rails 6.

[0037] The lead car 14 defines a leading end of the railway vehicle 10.

[0038] The lead car 14 is here a motor car or locomotive, configured for provide motive power for the vehicle 10, i.e. to push or pull the cars 12.

[0039] For this purpose, a motorization system 22 is embedded in the lead car 14. The motorization system 22 comprises in particular an electric motor electrically powered by the electric current captured by the pantograph 18 and configured to convert the electrical energy received into mechanical energy allowing the rotation of the wheels and thus the movement of the vehicle 10 in the direction V shown in [Fig.l].

[0040] In an advantageous embodiment, the railway vehicle 10 is configured to travel in both directions. The tail car 16 is then also a driving car capable of towing the other cars 12, 14. A second motorization system 22 is then embedded in the tail car 16.

[0041] Each car 12, 14, 16 comprises a body carried by the associated bogie(s) 20 and a roof cover 26 arranged on the body.

[0042] The body comprises a floor supported by the bogie(s) 20, two side faces and a roof which form the structure of the car. The roof cover 26 is placed on the roof of the body.

[0043] As visible in [Fig.2], the cover 26 comprises two side walls 28 and an upper wall 30 arranged between the two side walls 28.

[0044] The body and the hood 26 form an external envelope.

[0045] In particular, the side faces and the floor define a lower part of the outer shell and the side walls 28 and the top wall 30 together define an upper portion of the outer shell.

[0046] The car according to the invention further comprises at least one compartment 32 to be ventilated defined by the body and a ventilation system 34 for said compartment 32.

[0047] The car according to the invention is in particular a car 12 directly adjacent to a driving car, namely the front car 14 or the rear car 16.

[0048] In particular, the compartment to be ventilated 32 is arranged in the vicinity of one of the two ends of the corresponding car. Said end is suitable for being connected directly to the driving car 14, 16 and is called driving end 35 hereinafter.

[0049] As visible in [Fig.l], the compartment to be ventilated 32 is here located above the bogie 20. It is thus all the more advantageous not to reject the hot air outlet in the lower part of the car so as not to project hot air onto this bogie 20.

[0050] The compartment 32 to be ventilated is in particular a technical compartment comprising a plurality of electrical and electronic equipment 36, in particular for powering and controlling the motors.

[0051] Alternatively, the compartment 32 to be ventilated is for example included in the driving car.

[0052] The ventilation system 34 is advantageously arranged inside the external envelope. Thus, the ventilation system 34 does not protrude outside this external envelope and does not disturb the aerodynamics and therefore the performance of the railway vehicle 10.

[0053] The ventilation system 34 defines an inlet duct for an air flow, represented by arrows referenced F in FIGS. 1 and 3, towards the compartment 32, between at least one air inlet 40 provided in one of the side walls 28 and the compartment 32.

[0054] As visible in [Fig.2], the ventilation system 34 advantageously comprises two air inlets 40 each arranged on a respective side wall 28.

[0055] The two air inlets 40 are in particular symmetrical to each other with respect to a longitudinal plane comprising the longitudinal direction X-X' and the elevation direction Z-Z'.

[0056] Each air inlet 40 comprises two louvers 41 arranged along the longitudinal direction X-X' and each oriented in an opposite direction. Thus, each air inlet 40 has a symmetry with respect to a transverse plane and is therefore configured to cause the air flow to penetrate into the inlet duct in both directions of travel of the vehicle 10.

[0057] The air located next to the car at the level of the side walls 28 being in excess pressure compared to atmospheric pressure, the entry of the air flow into the air duct is facilitated.

[0058] In particular, the air pressure at the air inlet 40 is greater than the air pressure at an air outlet 42.

[0059] Each air inlet 40 therefore allows a significant air flow to enter while limiting pressure losses.

[0060] The pantograph 18 being arranged on the upper wall 30, the arrangement of the air inlets 40 on the side walls 28 makes it possible to avoid possible carbon pollution due to the friction of the pantograph 18 on the catenary 8.

[0061] As visible in [Fig. 3], the ventilation system 34 further comprises a filtering system 46 for filtering the air between each air inlet 40 and the compartment 32 to be ventilated.

[0062] The filtering system 46 makes it possible to prevent debris or dirt present in the air flow entering through the air inlet 40 from entering the compartment 32.

[0063] The filtering system 46 comprises for example a grid arranged in the inlet duct and / or at least one air filter arranged between the air inlet 40 and the compartment 32.

[0064] The ventilation system 34 further defines an outlet duct extending between the compartment 32 and an air outlet 42 provided in the upper wall 30.

[0065] The two air inlets 40 are connected to the same air outlet 42.

[0066] The air outlet 42 has an oblong shape extending in the direction transverse Y-Y'.

[0067] The air outlet 42 includes a grille preventing debris from entering the outlet duct from outside the vehicle 10.

[0068] When the railway vehicle 10 advances, the air located at the level of the upper wall 30 has a depression relative to the pressure inside the compartment 32, which allows the extraction of the air flow through the air outlet 42 due to the advance of the railway vehicle.

[0069] As seen in [Fig.2], the air inlets 40 and the air outlet 42 are separated along the transverse direction Y-Y'. The air outlet 42 is arranged substantially at center of the hood 26 in the transverse direction Y-Y' and each air inlet 40 is arranged laterally in the transverse direction Y-Y'.

[0070] This separation of the air inlets 40 and the air outlet 42 in the transverse direction Y-Y' makes it possible to avoid recirculation of the hot air leaving through the air outlet 42 towards the air inlets 40 and thus good performance of the ventilation system 34.

[0071] As visible in [Fig.2], the air inlet 40 and the air outlet 42 are arranged apart from each other in the longitudinal direction X-X'.

[0072] In particular, the air inlet 40 and the air outlet 42 are separated by a distance in the longitudinal direction X-X' greater than 50 cm.

[0073] As visible in [Fig.2], the air outlet 42 is arranged in the vicinity of the driving end 35. In particular, the air outlet 42 is arranged at a distance of less than 100 cm from the driving end 35 in the longitudinal direction XX.

[0074] As visible in [Fig.2], the upper wall 30 defines a trapezoidal-shaped opening opening at the driving end 35. The air outlet 42 is arranged at the base of the trapezium. This opening reinforces the air depression in this zone and promotes the extraction of the air flow through the air outlet 42.

[0075] Each air inlet 40 is further from the driving end 35 than the air outlet 42 in the longitudinal direction X-X'.

[0076] This separation of the air inlets 40 and the air outlet 42 along the longitudinal direction X-X' also makes it possible to avoid recirculation of hot air at the air inlets 40 and thus good performance of the ventilation system 34.

[0077] As visible in [Fig.l], the ventilation system 34 is arranged above the compartment to be ventilated 32 in the elevation direction Z-Z'.

[0078] In particular, the roof cover 26 defines an internal volume 50 separated from the compartment 32 to be ventilated by a roof 38 of the body.

[0079] The cover 26 further comprises a partition wall 44 arranged in the internal volume and separating the internal volume 50 into an inlet space 52 and an outlet space 54.

[0080] Each air inlet 40 opens into the inlet space 52 and each air outlet 42 opens into the outlet space 54.

[0081] The flow of fresh air entering the internal volume 50 is therefore separated from the flow of hot air leaving the internal volume 50 and recirculation of the flow of hot air is avoided.

[0082] The ventilation system 34 according to the invention therefore allows a significant draw of the air flow at the air inlets 40 while limiting pressure losses.

[0083] The ventilation system 34 is thus able to operate passively for the circulation of the air flow during the movement of the railway vehicle 10.

[0084] Indeed, the movement of the railway vehicle 10 causes air to circulate around the cars and thus creates a lateral overpressure of the air at the air inlets 40 and a depression of the air at the air outlet 42 in order to cause this circulation.

[0085] The ventilation system 34 therefore does not require the installation of large and powerful motorized fans to drive the air flow through the compartment 32.

[0086] The complexity of the ventilation in compartment 32 is therefore reduced and thus also the installation costs and maintenance requirements.

Claims

Claims

1. Car (12, 14, 16) of a railway vehicle (10) extending along a longitudinal direction (X-X') parallel to the direction of travel of the vehicle (10), and comprising: - a vehicle body defining at least one compartment (32) to be ventilated; - a roof cover (26) arranged on the body, the roof cover (26) comprising two side walls (28) and an upper wall (30) arranged between the two side walls (28); and - a ventilation system (34) for said compartment (32) defining: + an inlet duct for an air flow towards the compartment (32), between at least one air inlet (40) provided in one of the side walls (28) and the compartment (32), and + an outlet duct extending between the compartment (32) and an air outlet (42) provided in the upper wall (30), the air inlet (40) and the air outlet (42) being spaced apart from each other in the longitudinal direction (X-X').

2. Car (12, 14, 16) according to claim 1, wherein the ventilation system (34) comprises two air inlets (40) each provided on a respective side wall (28).

3. Car (12, 14, 16) according to claim 1 or 2, wherein the air inlet (40) and the air outlet (42) are separated by a distance in the longitudinal direction (X-X') greater than 50 cm, preferably 1 meter.

4. Car (12, 14, 16) according to any one of the preceding claims, comprising two ends in the longitudinal direction (X-X'), the compartment (32) to be ventilated being arranged in the vicinity of one of the two ends (35), each air inlet (40) being further from said end (35) than the air outlet (42) in the longitudinal direction (X-X').

5. Car (12, 14, 16) according to claim 4, wherein said end (35) is adapted to be connected directly to a driving car (14, 16) of the railway vehicle (10).

6. A car (12, 14, 16) according to any preceding claim, wherein the roof cover (26) defines an internal volume (50) separated from the compartment (32) by a roof (38) of the body, the roof cover (26) further comprising a partition wall (44) disposed in the internal volume (50) and separating the internal volume (50) into an inlet space (52) and an outlet space (54), each air inlet (40) opening into the inlet space and each air outlet (42) opening into the outlet space.

7. A car (12, 14, 16) according to any preceding claim, wherein the ventilation system (34) further comprises a filtering system (46) for filtering air between each air inlet (40) and the compartment (32).

8. Car (12, 14, 16) according to any one of the preceding claims, comprising a bogie (20) supporting the body, the compartment (32) to be ventilated being located above the bogie (20).

9. A car (12, 14, 16) according to any preceding claim, wherein the side walls (28) and the top wall (30) define an outer shell, the ventilation system (34) being disposed within the outer shell.

10. A car (12, 14, 16) according to any preceding claim, wherein the ventilation system (34) is adapted to operate passively for the circulation of air flow during movement of the railway vehicle (10).

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