WO2011120834A1 - Rail vehicle with a bogie comprising discrete streamlined elements designed to improve the aerodynamic performance of said bogie - Google Patents

Rail vehicle with a bogie comprising discrete streamlined elements designed to improve the aerodynamic performance of said bogie Download PDF

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Publication number
WO2011120834A1
WO2011120834A1 PCT/EP2011/054233 EP2011054233W WO2011120834A1 WO 2011120834 A1 WO2011120834 A1 WO 2011120834A1 EP 2011054233 W EP2011054233 W EP 2011054233W WO 2011120834 A1 WO2011120834 A1 WO 2011120834A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
floor
bogie
faired
discrete
Prior art date
Application number
PCT/EP2011/054233
Other languages
French (fr)
Inventor
Elisa Masson Beraud
Eliane Allain
Nicolas Paradot
Original Assignee
Societe Nationale Des Chemins De Fer Francais Sncf
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Nationale Des Chemins De Fer Francais Sncf filed Critical Societe Nationale Des Chemins De Fer Francais Sncf
Priority to EP11709134A priority Critical patent/EP2552760A1/en
Priority to MA35292A priority patent/MA34148B1/en
Publication of WO2011120834A1 publication Critical patent/WO2011120834A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

Definitions

  • the invention relates to the optimization of the aerodynamic behavior of railway vehicles during their displacement.
  • a high speed train, of the TGV ® type reaches speeds in excess of 300 km / h.
  • the movement of a train generates noise likely to hamper residents of rail transport infrastructure.
  • An improvement in the aerodynamic behavior of trains is therefore also intended to reduce this noise pollution.
  • an immediate solution consists in providing a profiled cowl that is mounted around the bogie so as to isolate the bogie from the bogie. flow of air flowing under the motor. With such a hood, the aerodynamic behavior of the motor is improved and energy consumption decreased. However, such a shroud hood does not allow access to the equipment of the bogie which requires removing the cover before any maintenance and maintenance.
  • the invention relates to a railway vehicle comprising a floor under which is mounted at least one support bogie of the vehicle intended to circulate on a taxiway, a vehicle characterized by the fact that comprises discrete fairing elements, mounted under the floor and arranged to improve the aerodynamic behavior of said truck during the longitudinal movement of the vehicle.
  • a flow of air flows from front to rear of the vehicle, the front and rear directions being defined with respect to the direction of movement of the vehicle.
  • the discrete faired elements are shifted transversely relative to each other in a plane transverse to the direction of longitudinal displacement of the vehicle.
  • the discrete faired elements are offset longitudinally relative to each other with respect to the direction of longitudinal displacement of the vehicle.
  • the orthogonal projection of the discrete faired elements in a plane transverse to the direction of longitudinal displacement of the vehicle, has an uninterrupted overall contour.
  • the carinated elements are discrete, that is to say disjointed from each other. They may be offset transversely or longitudinally relative to each other with respect to the direction of longitudinal displacement of the vehicle.
  • the faired elements advantageously perform the same function as a global profiled cowling surrounding the bogie, because the air flow comes into contact with at least one of the streamlined elements. discreet during its circulation under the floor.
  • the orthogonal projection of a single hood surrounding the bogie is substantially identical to that of the plurality of discrete faired elements.
  • the discrete faired elements generally protect devices or modules mounted under the floor behind said discrete faired elements.
  • the bogie is connected to the floor of the vehicle by an anti-lace device, a faired protection being mounted on said anti-lace device.
  • the anti-yaw device comprises a damper connected at a first end to the bogie and, at a second end, to a footboard secured to the floor, the fairing protection being mounted on the front face of the foot of the body .
  • the fairing protection advantageously makes it possible to limit its disturbances.
  • the faired protection comprises two lateral faces symmetrical with respect to a longitudinal plane passing through said faired protection.
  • the faired protection has an increasing section towards the floor, preferably flared vertically towards the floor of the vehicle.
  • the foot is integrated in the floor of the vehicle.
  • the vehicle running from the rear to the front comprises at least one air deflection rake mounted under the floor in front of the bogie and arranged to guide a flow of air between the bogie and the taxiway and modify the structure of the flow.
  • the air deflection rake advantageously deflects the flow of air to the traffic lane thus avoiding the impact thereof with the devices and modules mounted under the floor.
  • the air deflection rake is mounted under the floor of the vehicle and extends orthogonally to the longitudinal direction of travel of the vehicle. More preferably, the air deflection rake is in the form of a streamlined element of triangular section of which a stop is crenellated.
  • the vehicle comprises at least one operational module mounted under the floor of the vehicle, a smoothing cap being mounted under the floor of the vehicle, the hood comprising at least one receiving opening of said operating module formed in its outer casing, the cover being dimensioned so that said operational module is flush with the outer casing of the cover.
  • the operational module integrated in the smoothing cap, is no longer a source of aerodynamic disturbance.
  • the discrete faired elements are mounted in front of the bogie.
  • the bogie is thus protected by the discrete faired elements.
  • FIG. 1 shows a perspective side view of a railway power train according to a first embodiment of the invention
  • FIG. 2 represents a close-up perspective view of the side of the bogie of the power car of FIG. 1;
  • FIG. 3 represents a bottom perspective view of the bogie of the power car of FIGS. 1 and 2;
  • FIG. 4 shows a schematic side view of a faired protection on a bogie body stand according to the invention
  • FIG. 5 represents a diagrammatic perspective view from below of the faired protection of FIG. 4;
  • FIG. 6 represents a perspective view from below of a railway power train according to a second embodiment of the invention.
  • FIG. 7 represents a close perspective view from below of the power unit of FIG. 6;
  • FIG. 8 represents a schematic perspective view of an air deflection rake mounted under the floor of the power car of FIG. 7;
  • FIG. 9 represents a perspective view from below of a train with a power unit according to FIGS. 6 and 7.
  • a railway vehicle such as a train, comprises a motor and one or more cars, connected with each other, which are towed by the motor, the cars can be articulated with each other as it is. is for example the case with the TGV® train.
  • the train moves back and forth on a taxiway which preferably includes rails resting on wooden or concrete sleepers.
  • the motor located at the front of the train, pulls the cars behind the motor.
  • the train comprises only a single motor, but it goes without saying that the invention also applies to a train having a plurality of engines.
  • the driving 1 of the train and its following cars rely on bogies, known to those skilled in the art, which are arranged to support the weight of the train on the rails of the taxiway.
  • bogies known to those skilled in the art, which are arranged to support the weight of the train on the rails of the taxiway.
  • a car simultaneously rests on two bogies located at each end of the car.
  • the motor includes two motor bogies (a first motor bogie located at the front of the power car, and a second motor bogie at the rear of the power car), arranged to move the power car on the rails, while the cars include bogies. carriers (not shown), supporting the weight of cars on the rails and not providing energy for travel.
  • the motor bogie 2 of the power train 1 comprises a main body on which are mounted axles and drive wheels of the truck, the bogie 2 being mounted under the floor of the drive.
  • the floor of the motor, referenced 10 in FIG. 2 is in the form of a flat surface extending horizontally, the horizontal direction being defined with respect to the taxiway of the vehicle which extends in a horizontal plane.
  • the motor 1 transmits to the motor bogie 2 the energy required to move the train.
  • the motor bogie 2 like the other bogies, is pivotable relative to the floor 10 to allow the train to negotiate curves during its movement on the taxiway, the pivot connection between the floor and the bogie 2 being well known to those skilled in the art, it will not be detailed later.
  • anti-yawing devices are provided between the main body of the bogie 2 and the floor 10 in order to limit the pivoting of the bogie 2 to enable control of the bogie 2.
  • An anti-yaw device of the bogie 2 is shown in FIG. 2.
  • the floor 10 of the power unit 1 comprises a floor stand 3, in the form of a vertical element (of unformed section and directly exposed to the flow of air) mounted under the floor 10 and extending in the direction of the taxiway.
  • a damper called “bogie box” 5, also called anti-yaw damper, is connected on the one hand to the foot of box 3, integral with the floor 10 of the drive 1, and secondly to the main body of the bogie 2.
  • the foot 3 is mounted at the lateral end of the floor 10 to allow better damping of the torque of the truck 2 relative to the floor 10.
  • the foot of the body is traditionally distant from the center of the floor 10 because it must be away from the pivot axis to dampen the moment of the bogie, that is to say its rotation.
  • a bogie comprises two anti-yaw devices. Thereafter, only one of the anti-yaw devices of the truck will be described, this description applies to other devices of the vehicle. Faired protection
  • the body foot 3 comprises a discrete element which is, in this example, in the form of a faired protection 4 arranged to improve the aerodynamic behavior of the motor bogie 2 during the longitudinal movement of the vehicle.
  • the faired protection 4 is provided on the front face of the footboard 3 which faces the flow of air as shown in Figures 2 and 3.
  • the faired protection 4 extends over the entire front face of the stand 3 so that the flow of air does not come into frontal contact but gradually with the guarded protection 4 which protects the body foot 3.
  • the latter is in the form of a piece extending longitudinally forwards and comprising two lateral faces 41, 42 which are preferably symmetrical with respect to the Another with respect to a vertical and longitudinal plane passing through the faired protection 4.
  • the lateral faces 41, 42 of the faired protection 4 are profiled to allow a circulation of the air flow minimizing the turbulence.
  • the section of the faired protection 4, in a horizontal plane is increasing when said horizontal plane is moved vertically towards the floor 10.
  • the section of the faired protection 4 in a longitudinal vertical plane is growing when moving said longitudinal vertical plane laterally from the lateral end of the floor 10 inwardly of the floor 10 to its plane of symmetry, then decreasing from its plane of symmetry towards the interior of the floor 10.
  • the faired protection 4 further comprises an end face 43 formed at its end farthest from the floor 10 arranged to form a transition face between the lateral faces 41, 42 of the protection 4 and a lower horizontal face 31 of the body foot 3.
  • the end face 43 ensures the continuity of the surfaces with the other faces 41, 42, 31.
  • the end face 43 of the faired protection 4 allows a fluid circulation of the air flow from the lateral faces 41, 42 to the end face 43 and from the end face 43 to the horizontal lower face 31 of the foot of checkout 3.
  • the flow of air generated by the movement of the train, moves longitudinally towards the rear of the train and meets the faired protection 4 whose lateral surfaces 41, 42 deflect the airflow laterally and whose the bottom surface 43 deflects the flow of air to the taxiway.
  • the faired protection 4 is thicker at its junction with the floor 10, the air flow circulates fluidly between the side faces 41, 42 of the faired protection 4 and the floor 10.
  • the lateral faces 41, 42 ensure the continuity of the surfaces with the horizontal surface of the floor
  • the air flow does not encounter any significant aerodynamic obstacle at the feet of the body 3 of the engine bogie 2.
  • the invention has been presented here for a single foot box 3 but it goes without saying that it applies similarly to several side feet laterally opposite and / or located on bogies carriers, for example, under a car.
  • the faired protection 4 is here reported on the cash register 3 but it goes without saying that the cash register 3 and the faired protection 4 could form a unitary element.
  • a bogie engine 2 comprises many elements whose shape generates turbulence.
  • a second embodiment of the invention is described with reference to FIGS. 6 to 9.
  • the references used to describe elements of structure or function that are identical, equivalent or similar to those of the elements of FIGS. 1 to 5 are the same, to simplify the description.
  • the entire description of the first embodiment is not repeated, this description applies to the elements of Figures 6 to 9 when there are no incompatibilities. Only notable differences, structural and functional, are described.
  • the power unit 1 comprises, in addition to the keeled protections 4, an air deflection shield called a bow 20 and an air deflection rake 23 mounted under the floor 10 in front of the bogie 2.
  • Air deflection shield (bow) Air deflection shield (bow)
  • the bow 20 is in the form of a casing located in front of the bogie engine 2, preferably hollow, comprising a horizontal bottom portion 21 and a side portion 19, forming a closed assembly, connected by its upper end to the floor 10 of the powerhead and its lower end to the horizontal bottom portion 21 as shown in Figure 6.
  • the bow 20 deflects the airflow laterally, via its side portion 19, and under the floor 10 of the vehicle, via its horizontal bottom portion 21.
  • operational modules 7 such as telecommunication modules, are mounted under the stem 20 which deteriorates its aerodynamic behavior.
  • a smoothing cover 22 is mounted under the horizontal bottom portion 21 of the stem 20, the smoothing cover 22 comprising at least one opening 24 for receiving said operating module 7 arranged in its outer casing 25, the cover 22 being sized so that said operating module 7 can be flush with the outer casing 25 of the smoothing cap 22 when it is mounted on the vehicle.
  • the smoothing hood 22 is in the form of a substantially triangular isosceles-shaped hood whose tip of the triangle is oriented towards the front of the motor 1 and whose median, issuing from said tip , extends longitudinally in the direction of movement of the vehicle 1.
  • the smoothing cap 22 is substantially curved and comprises a vertical thickness in order to accommodate the operational modules 7.
  • the smoothing cap 22 is connected directly to the bottom wall 21 of the bow 20 sealingly so that the flow of air does not circulate between the bow 20 and the cover 22. It goes without saying that openings 24 of any shape may be suitable.
  • the outer casing 25 of the cover 22 comprises openings 24, of square shape in FIG. 7, for receiving the operational modules 7.
  • the dimensions of said openings 24 are adapted so that the modules are flush with the outer casing 25. of the smoothing cover 22 when the modules 7 are housed in the smoothing cover 22.
  • the smoothing cover 22 is, in this example, profiled from front to rear, its thickness being increasing from the front towards the rear according to a substantially regular slope so that the flow of air flowing under the floor 10, that is to say between the taxiway of the vehicle and its floor 10, is progressively deflected by the smoothing cap 22 to the taxiway to avoid coming into contact with the operational modules 7 and the bogie 2.
  • the operational modules 7 being integrated in the smoothing cover 22, the air flow circulates back and forth without turbulence.
  • the smoothing cap 22 smooths and controls the flow of air flow on the assembly formed by the floor 10, the bow 20 and the operational modules 7, which is why it is designated smoothing cover 22.
  • smoothing cap 22 could be mounted directly under the floor 10, without bow 20, the operational modules 7 being mounted directly under the floor 10.
  • the air deflection rake 23 is in the form of a horizontal element which extends orthogonally to the direction of longitudinal displacement of the vehicle.
  • the section of the rake 23 of air deflection by a vertical and longitudinal plane is in the form of a right triangle.
  • the air deflection rake 23 comprises a horizontal connecting face 29 connected to the bottom portion 21 of the bow 20, a vertical rear face 30 facing the rear of the vehicle and an oblique face 26 of deflection , corresponding to the hypotenuse of the right triangle whose section of the rake 23 to the shape, which is oblique with respect to the bottom portion 21 of the stem 20, the rake 23 being flared from the front to the rear of the vehicle.
  • this air deflection element comprises a plurality of teeth 27, it is designated air deflection rake 23.
  • two air deflection rakes 23 are mounted under the floor 10 of the vehicle and offset laterally. It goes without saying that a single air deflection rake of greater length (for example equal to the width of the floor 10) could also be suitable.
  • each air deflection rake 23 is mounted in front of each of the wheels of the front axle of the engine bogie 2.
  • the flow of air circulates, in part, between the teeth 27 of the air deflection rake 23, this allows, by modifying the structure of the flow, to limit the noise emissions and the level of turbulence.
  • the deflection rakes 23 are discrete faired elements improving the aerodynamic behavior of said bogie 2 during the longitudinal displacement of the vehicle.
  • the air deflection rakes 23 are mounted partially under the smoothing hood 22, only the teeth 27 of the air deflection rakes 23 being protruding with respect to the outer casing 25 of the hood
  • the air deflection rakes 23 are dimensioned such that the outer casing 25 of the smoothing cap 22 is at the same height as the bottom surface 28 of the cavities of the air deflection rakes 23.
  • the outer casing 25 of the smoothing cap 22 is continuous with the bottom surface 28 of the cavities formed between the teeth 27 of the air deflection rakes 23.
  • the air deflection rakes 23 could be mounted directly under the floor 10 without bow 20, the horizontal connecting face 29 of each air deflection rake 23 being connected directly to the floor 10.
  • the discrete faired elements are mounted in front of the engine bogie 2 so as to reduce its aerodynamic impact on the overall behavior of the engine 1.
  • the faired elements are mounted so as to deflect any flow of air towards the bogie 2.
  • the orthogonal projection of the discrete faired elements, in a plane transverse to the longitudinal direction of movement of the vehicle has a global contour almost uninterrupted and preferably uninterrupted.
  • the term "near-uninterrupted overall contour” is understood to mean that the contour of each of the discrete faired elements is distant from the contours of the other elements careened by a small distance, preferably less than 10 cm.
  • the motor bogie 2 is globally protected by a plurality of local discrete elements, the discrete elements being offset laterally and longitudinally with respect to the longitudinal direction of movement of the vehicle.
  • the discrete faired elements are distant from each other and disjoint, they are distributed so as to form an uninterrupted overall contour vis-à-vis the flow of air flowing from front to rear.
  • the overall contour of the discrete faired elements is the same as that of a global ducted element vis-à-vis the air flow, the discrete faired elements having the advantage of allowing maintenance operations because of their spacing. Thanks to this discreet protection, the noises generated by the movement of the vehicle are attenuated and the aerodynamic behavior of the vehicle is improved.
  • the invention has been described for a railway vehicle of the TGV® train type, but it goes without saying that the invention applies to any type of railway vehicle, such as for example, an AGV® type train for high speed railcar comprising an entirely articulated train or a train of the ICE3® type comprising a self-propelled train with distributed motorization.

Abstract

A rail vehicle (1) comprising a floor (10) under which is mounted at least one vehicle support bogie (2) intended to run on a track, the vehicle being characterized in that it comprises discrete streamlined elements (4, 21, 22, 23) mounted under the floor (10) and designed to improve the aerodynamic performance of said bogie (2) during longitudinal travel of the vehicle (1).

Description

Véhicule ferroviaire avec un bogie comprenant des éléments carénés discrets agencés pour améliorer le comportement aérodynamique dudit bogie  Railway vehicle with a bogie comprising discrete faired elements arranged to improve the aerodynamic behavior of said bogie
L'invention concerne l'optimisation du comportement aérodynamique des véhicules ferroviaires au cours de leur déplacement. The invention relates to the optimization of the aerodynamic behavior of railway vehicles during their displacement.
Un train à grande vitesse, du type TGV ®, atteint en circulation des vitesses supérieures à 300 km/h. Afin de permettre d'accroître encore plus cette vitesse, sans pour autant engendrer une consommation excessive d'énergie, il a été proposé d'améliorer le comportement aérodynamique des trains. Par ailleurs, outre les problèmes de consommation d'énergie, la circulation d'un train engendre du bruit susceptible de gêner les riverains d'infrastructures de transports ferroviaires. Une amélioration du comportement aérodynamique des trains vise donc également à diminuer cette pollution sonore. A high speed train, of the TGV ® type, reaches speeds in excess of 300 km / h. In order to allow this speed to be increased even more without causing excessive consumption of energy, it has been proposed to improve the aerodynamic behavior of the trains. Moreover, in addition to the problems of energy consumption, the movement of a train generates noise likely to hamper residents of rail transport infrastructure. An improvement in the aerodynamic behavior of trains is therefore also intended to reduce this noise pollution.
En outre, il est courant que des équipements soient rajoutés au train au cours de sa vie afin de suivre l'évolution des différentes technologies (antennes de communication pour WIFI ®, etc.) ce qui contribue, en raison de leur positionnement sur la surface extérieure du train, à dégrader encore plus le comportement aérodynamique du train. In addition, it is common for equipment to be added to the train during its lifetime in order to follow the evolution of different technologies (communication antennas for WIFI ®, etc.) which contributes, because of their positioning on the surface. exterior of the train, to further degrade the aerodynamic behavior of the train.
Une étude, réalisée par la demanderesse, a montré que la forme de la motrice du train impacte de manière importante son comportement aérodynamique. En particulier, il a été mesuré que des turbulences se forment sous la motrice, entre le plancher de la motrice et la voie de circulation du train, et sur ses côtés à proximité des bogies qui sont des chariots sur lesquels reposent les différentes voitures du train. A study, carried out by the applicant, has shown that the shape of the train engine significantly impacts its aerodynamic behavior. In particular, it has been measured that turbulence is formed under the motor, between the floor of the powertrain and the running lane of the train, and on its sides near the bogies which are trolleys on which rest the various cars of the train. .
Afin de résoudre cet inconvénient, une solution immédiate consiste à prévoir un capot profilé que l'on monte, autour du bogie, de manière à isoler le bogie du flux d'air circulant sous la motrice. Grâce à un tel capot, le comportement aérodynamique de la motrice est amélioré et la consommation énergétique diminuée. Cependant, un tel capot caréné ne permet pas d'accéder aux équipements du bogie ce qui nécessite de retirer le capot avant toute intervention d'entretien et de maintenance. In order to solve this drawback, an immediate solution consists in providing a profiled cowl that is mounted around the bogie so as to isolate the bogie from the bogie. flow of air flowing under the motor. With such a hood, the aerodynamic behavior of the motor is improved and energy consumption decreased. However, such a shroud hood does not allow access to the equipment of the bogie which requires removing the cover before any maintenance and maintenance.
Afin d'éliminer au moins certains de ces inconvénients, l'invention concerne un véhicule ferroviaire comprenant un plancher sous lequel est monté au moins un bogie de support du véhicule destiné à circuler sur une voie de circulation, véhicule caractérisé par le fait qu'il comprend des éléments carénés discrets, montés sous le plancher et agencés pour améliorer le comportement aérodynamique dudit bogie au cours du déplacement longitudinal du véhicule. In order to eliminate at least some of these drawbacks, the invention relates to a railway vehicle comprising a floor under which is mounted at least one support bogie of the vehicle intended to circulate on a taxiway, a vehicle characterized by the fact that comprises discrete fairing elements, mounted under the floor and arranged to improve the aerodynamic behavior of said truck during the longitudinal movement of the vehicle.
Entre le plancher du véhicule et la voie de circulation, un flux d'air circule de l'avant vers l'arrière du véhicule, les directions avant et arrière étant définies par rapport à la direction de déplacement du véhicule. Between the floor of the vehicle and the taxiway, a flow of air flows from front to rear of the vehicle, the front and rear directions being defined with respect to the direction of movement of the vehicle.
Le flux d'air, au cours de son déplacement, rencontre les éléments carénés discrets placés sous le plancher ce qui améliore le comportement aérodynamique du train. Ainsi, tout module ou dispositif monté sous le plancher en arrière des éléments carénés est moins sollicité par le flux d'air. The flow of air, during its movement, meets the streamlined elements careened under the floor which improves the aerodynamic behavior of the train. Thus, any module or device mounted under the floor behind the streamlined elements is less stressed by the air flow.
De préférence, les éléments carénés discrets sont décalés transversalement les uns par rapport aux autres dans un plan transversal à la direction de déplacement longitudinale du véhicule. Preferably, the discrete faired elements are shifted transversely relative to each other in a plane transverse to the direction of longitudinal displacement of the vehicle.
De préférence encore, les éléments carénés discrets sont décalés longitudinalement les uns par rapport aux autres par rapport à la direction de déplacement longitudinale du véhicule. Selon une forme de réalisation préférée, la projection orthogonale des éléments carénés discrets, dans un plan transversal à la direction de déplacement longitudinale du véhicule, présente un contour global ininterrompu. Les éléments carénés sont discrets, c'est-à-dire disjoints les uns des autres. Ils peuvent être décalés transversalement ou longitudinalement les uns par rapport aux autres par rapport à la direction de déplacement longitudinale du véhicule. Lorsque la projection orthogonale des éléments carénés discrets présente un contour global ininterrompu, les éléments carénés remplissent avantageusement la même fonction qu'un capot profilé global entourant le bogie, du fait que le flux d'air entre en contact avec au moins un des éléments carénés discrets au cours de sa circulation sous le plancher. En effet, la projection orthogonale d'un unique capot entourant le bogie est sensiblement identique à celle de la pluralité d'éléments carénés discrets. Ainsi, les éléments carénés discrets protègent globalement les dispositifs ou modules montés sous le plancher en arrière des desdits éléments carénés discrets. En outre, grâce à l'espace ménagé entre les éléments carénés discrets, il est toujours possible d'accéder aux équipements du bogie pour effectuer une opération de maintenance. Selon un premier aspect de l'invention, le bogie est relié au plancher du véhicule par un dispositif anti-lacet, une protection carénée étant montée sur ledit dispositif anti-lacet. More preferably, the discrete faired elements are offset longitudinally relative to each other with respect to the direction of longitudinal displacement of the vehicle. According to a preferred embodiment, the orthogonal projection of the discrete faired elements, in a plane transverse to the direction of longitudinal displacement of the vehicle, has an uninterrupted overall contour. The carinated elements are discrete, that is to say disjointed from each other. They may be offset transversely or longitudinally relative to each other with respect to the direction of longitudinal displacement of the vehicle. When the orthogonal projection of the discrete faired elements has an uninterrupted overall contour, the faired elements advantageously perform the same function as a global profiled cowling surrounding the bogie, because the air flow comes into contact with at least one of the streamlined elements. discreet during its circulation under the floor. Indeed, the orthogonal projection of a single hood surrounding the bogie is substantially identical to that of the plurality of discrete faired elements. Thus, the discrete faired elements generally protect devices or modules mounted under the floor behind said discrete faired elements. In addition, thanks to the space between the discrete faired elements, it is always possible to access the equipment of the bogie to perform a maintenance operation. According to a first aspect of the invention, the bogie is connected to the floor of the vehicle by an anti-lace device, a faired protection being mounted on said anti-lace device.
De préférence, le dispositif anti-lacet comprend un amortisseur relié, à une première extrémité, au bogie, et, à une deuxième extrémité, à un pied de caisse solidaire du plancher, la protection carénée étant montée sur la face avant du pied de caisse. Comme le pied de caisse est saillant, sa contribution aux perturbations aérodynamique est importante. La protection carénée permet avantageusement de limiter ses perturbations. De préférence encore, la protection carénée comprend deux faces latérales symétriques par rapport à un plan longitudinal passant par ladite protection carénée. Ainsi, le flux d'air est dévié du pied de caisse qui ne crée ainsi pas ou peu de turbulences dans la circulation du flux d'air. Preferably, the anti-yaw device comprises a damper connected at a first end to the bogie and, at a second end, to a footboard secured to the floor, the fairing protection being mounted on the front face of the foot of the body . As the footboard is salient, its contribution to aerodynamic disturbances is important. The faired protection advantageously makes it possible to limit its disturbances. More preferably, the faired protection comprises two lateral faces symmetrical with respect to a longitudinal plane passing through said faired protection. Thus, the air flow is diverted from the foot of the body which thus does not create or little turbulence in the flow of air flow.
De préférence toujours, la protection carénée possède une section croissante en direction du plancher, de préférence évasée verticalement vers le plancher du véhicule. Ainsi, il n'existe pas de perturbation aérodynamique au niveau de la liaison entre le pied de caisse et le plancher, le pied de caisse étant intégré au plancher du véhicule. Preferably still, the faired protection has an increasing section towards the floor, preferably flared vertically towards the floor of the vehicle. Thus, there is no aerodynamic disturbance at the connection between the foot of the body and the floor, the foot is integrated in the floor of the vehicle.
Selon un deuxième aspect de l'invention, le véhicule circulant de l'arrière vers l'avant, le véhicule comprend au moins un râteau de déviation d'air monté sous le plancher en avant du bogie et agencé pour guider un flux d'air longitudinal entre le bogie et la voie de circulation et modifier la structure de l'écoulement. According to a second aspect of the invention, the vehicle running from the rear to the front, the vehicle comprises at least one air deflection rake mounted under the floor in front of the bogie and arranged to guide a flow of air between the bogie and the taxiway and modify the structure of the flow.
Le râteau de déviation d'air permet avantageusement de dévier le flux d'air vers la voie de circulation évitant ainsi l'impact de celui-ci avec les dispositifs et modules montés sous le plancher. The air deflection rake advantageously deflects the flow of air to the traffic lane thus avoiding the impact thereof with the devices and modules mounted under the floor.
De préférence, le râteau de déviation d'air est monté sous le plancher du véhicule et s'étend orthogonalement à la direction de déplacement longitudinale du véhicule. De préférence encore, le râteau de déviation d'air se présente sous la forme d'un élément caréné de section triangulaire dont une arrête est crénelée. Preferably, the air deflection rake is mounted under the floor of the vehicle and extends orthogonally to the longitudinal direction of travel of the vehicle. More preferably, the air deflection rake is in the form of a streamlined element of triangular section of which a stop is crenellated.
Selon un troisième aspect de l'invention, le véhicule comprend au moins un module opérationnel monté sous le plancher du véhicule, un capot de lissage étant monté sous le plancher du véhicule, le capot comprenant au moins une ouverture de réception dudit module opérationnel ménagée dans son enveloppe extérieure, le capot étant dimensionné de manière à ce que ledit module opérationnel affleure à l'enveloppe extérieure du capot. Ainsi, le module opérationnel, intégré au capot de lissage, n'est plus une source de perturbation aérodynamique. According to a third aspect of the invention, the vehicle comprises at least one operational module mounted under the floor of the vehicle, a smoothing cap being mounted under the floor of the vehicle, the hood comprising at least one receiving opening of said operating module formed in its outer casing, the cover being dimensioned so that said operational module is flush with the outer casing of the cover. Thus, the operational module, integrated in the smoothing cap, is no longer a source of aerodynamic disturbance.
De préférence, les éléments carénés discrets sont montés en avant du bogie. Le bogie est ainsi protégé par les éléments carénés discrets. L'invention sera mieux comprise à l'aide du dessin annexé sur lequel : Preferably, the discrete faired elements are mounted in front of the bogie. The bogie is thus protected by the discrete faired elements. The invention will be better understood with the aid of the appended drawing in which:
- la figure 1 représente une vue en perspective de côté d'une motrice ferroviaire selon une première forme de réalisation de l'invention ;  - Figure 1 shows a perspective side view of a railway power train according to a first embodiment of the invention;
- la figure 2 représente une vue en perspective rapprochée de côté du bogie de la motrice de la figure 1 ;  FIG. 2 represents a close-up perspective view of the side of the bogie of the power car of FIG. 1;
- la figure 3 représente une vue en perspective de dessous du bogie de la motrice des figures 1 et 2;  FIG. 3 represents a bottom perspective view of the bogie of the power car of FIGS. 1 and 2;
- la figure 4 représente une vue schématique de côté d'une protection carénée sur un pied de caisse de bogie selon l'invention;  - Figure 4 shows a schematic side view of a faired protection on a bogie body stand according to the invention;
- la figure 5 représente une vue schématique en perspective de dessous de la protection carénée de la figure 4;  FIG. 5 represents a diagrammatic perspective view from below of the faired protection of FIG. 4;
- la figure 6 représente une vue en perspective de dessous d'une motrice ferroviaire selon une deuxième forme de réalisation de l'invention ;  FIG. 6 represents a perspective view from below of a railway power train according to a second embodiment of the invention;
- la figure 7 représente une vue en perspective rapprochée de dessous de la motrice de la figure 6;  FIG. 7 represents a close perspective view from below of the power unit of FIG. 6;
- la figure 8 représente une vue en perspective schématique d'un râteau de déviation d'air monté sous le plancher de la motrice de la figure 7; et FIG. 8 represents a schematic perspective view of an air deflection rake mounted under the floor of the power car of FIG. 7; and
- la figure 9 représente une vue en perspective de dessous d'un train avec une motrice selon les figures 6 et 7. De manière classique, un véhicule ferroviaire, tel qu'un train, comprend une motrice et une ou plusieurs voitures, reliées les unes avec les autres, qui sont tractées par la motrice, les voitures pouvant être articulées les unes avec les autres comme c'est par exemple le cas avec le train TGV®. FIG. 9 represents a perspective view from below of a train with a power unit according to FIGS. 6 and 7. Typically, a railway vehicle, such as a train, comprises a motor and one or more cars, connected with each other, which are towed by the motor, the cars can be articulated with each other as it is. is for example the case with the TGV® train.
En fonctionnement, le train se déplace d'arrière en avant sur une voie de circulation qui comprend, de préférence, des rails reposant sur des traverses de bois ou de béton. La motrice, située à l'avant du train, tire les voitures situées derrière la motrice. In operation, the train moves back and forth on a taxiway which preferably includes rails resting on wooden or concrete sleepers. The motor, located at the front of the train, pulls the cars behind the motor.
Dans les formes de réalisations décrites de l'invention, le train ne comprend qu'une unique motrice mais il va de soi que l'invention s'applique également à un train ayant plusieurs motrices. En référence à la figure 1 représentant une première forme de réalisation de l'invention, la motrice 1 du train ainsi que ses voitures suiveuses reposent sur des bogies, connus de l'homme du métier, qui sont agencés pour supporter le poids du train sur les rails de la voie de circulation. De préférence, une voiture repose simultanément sur deux bogies situés à chacune des extrémités de la voiture. La motrice comprend deux bogies moteur (un premier bogie moteur situé à l'avant de la motrice, et un second bogie moteur à l'arrière de la motrice), agencés pour déplacer la motrice sur les rails, tandis que les voitures comprennent des bogies porteurs (non représentés), supportant le poids des voitures sur les rails et ne fournissant pas d'énergie pour le déplacement. In the described embodiments of the invention, the train comprises only a single motor, but it goes without saying that the invention also applies to a train having a plurality of engines. Referring to Figure 1 showing a first embodiment of the invention, the driving 1 of the train and its following cars rely on bogies, known to those skilled in the art, which are arranged to support the weight of the train on the rails of the taxiway. Preferably, a car simultaneously rests on two bogies located at each end of the car. The motor includes two motor bogies (a first motor bogie located at the front of the power car, and a second motor bogie at the rear of the power car), arranged to move the power car on the rails, while the cars include bogies. carriers (not shown), supporting the weight of cars on the rails and not providing energy for travel.
En référence aux figures 1 et 2, le bogie moteur 2 de la motrice du train 1 comporte un corps principal sur lequel sont montés des essieux et des roues d'entraînement du bogie, le bogie 2 étant monté sous le plancher de la motrice. Le plancher de la motrice, référencé 10 sur la figure 2, se présente sous la forme d'une surface plane s'étendant horizontalement, la direction horizontale étant définie par rapport à la voie de circulation du véhicule qui s'étend dans un plan horizontal. Referring to Figures 1 and 2, the motor bogie 2 of the power train 1 comprises a main body on which are mounted axles and drive wheels of the truck, the bogie 2 being mounted under the floor of the drive. The floor of the motor, referenced 10 in FIG. 2, is in the form of a flat surface extending horizontally, the horizontal direction being defined with respect to the taxiway of the vehicle which extends in a horizontal plane.
La motrice 1 transmet au bogie moteur 2 l'énergie nécessaire au déplacement du train. Le bogie moteur 2, comme les autres bogies, est apte à pivoter par rapport au plancher 10 pour permettre au train de négocier des courbes au cours de son déplacement sur la voie de circulation, la liaison pivot entre le plancher et le bogie 2 étant bien connue de l'homme du métier, elle ne sera pas détaillée par la suite. The motor 1 transmits to the motor bogie 2 the energy required to move the train. The motor bogie 2, like the other bogies, is pivotable relative to the floor 10 to allow the train to negotiate curves during its movement on the taxiway, the pivot connection between the floor and the bogie 2 being well known to those skilled in the art, it will not be detailed later.
Afin de maîtriser le pivotement du bogie moteur 2 par rapport au plancher 10 de la motrice 1, des dispositifs anti-lacet sont prévus entre le corps principal du bogie 2 et le plancher 10 afin de limiter le pivotement du bogie 2 pour permettre de maîtriser le comportement dynamique du train sur la voie de circulation et de préserver le confort dynamique à bord du train. Un dispositif anti-lacet du bogie 2 est représenté sur la figure 2. In order to control the pivoting of the motor bogie 2 with respect to the floor 10 of the power unit 1, anti-yawing devices are provided between the main body of the bogie 2 and the floor 10 in order to limit the pivoting of the bogie 2 to enable control of the bogie 2. dynamic behavior of the train on the taxiway and maintain dynamic comfort on the train. An anti-yaw device of the bogie 2 is shown in FIG. 2.
Le plancher 10 de la motrice 1 comprend un pied de caisse 3, se présentant sous la forme d'un élément vertical (de section non profilée et directement exposée au flux d'air) monté sous le plancher 10 et s 'étendant en direction de la voie de circulation. Un amortisseur dit de « bogie caisse » 5, dénommé aussi amortisseur anti lacet, est relié d'une part au pied de caisse 3, solidaire du plancher 10 de la motrice 1, et d'autre part au corps principal du bogie 2. Le pied de caisse 3 est monté à l'extrémité latérale du plancher 10 afin d'autoriser un meilleur amortissement du moment de rotation du bogie 2 par rapport au plancher 10. Le pied de caisse est traditionnellement éloigné du centre du plancher 10 car il doit être loin de l'axe de pivotement pour amortir le moment du bogie, c'est-à-dire sa rotation. D'un point de vue aérodynamique et acoustique, cela présente un inconvénient majeur étant donné que le pied de caisse 3 est en contact direct avec le flux d'air, généré par le déplacement longitudinal du train, qui circule sous le plancher 10 de la motrice. Ainsi, des turbulences se forment au niveau du pied de caisse 3. The floor 10 of the power unit 1 comprises a floor stand 3, in the form of a vertical element (of unformed section and directly exposed to the flow of air) mounted under the floor 10 and extending in the direction of the taxiway. A damper called "bogie box" 5, also called anti-yaw damper, is connected on the one hand to the foot of box 3, integral with the floor 10 of the drive 1, and secondly to the main body of the bogie 2. The foot 3 is mounted at the lateral end of the floor 10 to allow better damping of the torque of the truck 2 relative to the floor 10. The foot of the body is traditionally distant from the center of the floor 10 because it must be away from the pivot axis to dampen the moment of the bogie, that is to say its rotation. From an aerodynamic and acoustic point of view, this presents a major drawback since the body stand 3 is in direct contact with the air flow, generated by the longitudinal movement of the train, which circulates under the floor 10 of the floor. driving. Thus, turbulence is formed at the foot of the body 3.
De manière classique, un bogie comprend deux dispositifs anti-lacet. Par la suite, seul un des dispositifs anti-lacet du bogie va être décrit, cette description s'appliquant aux autres dispositifs du véhicule. Protection carénée Conventionally, a bogie comprises two anti-yaw devices. Thereafter, only one of the anti-yaw devices of the truck will be described, this description applies to other devices of the vehicle. Faired protection
Pour éliminer cet inconvénient, le pied de caisse 3 comprend un élément discret se présentant, dans cet exemple, sous la forme d'une protection carénée 4 agencée pour améliorer le comportement aérodynamique du bogie moteur 2 au cours du déplacement longitudinal du véhicule. En référence à la figure 2, la protection carénée 4 est ménagée sur la face avant du pied de caisse 3 qui fait face au flux d'air comme représenté sur les figures 2 et 3. To eliminate this drawback, the body foot 3 comprises a discrete element which is, in this example, in the form of a faired protection 4 arranged to improve the aerodynamic behavior of the motor bogie 2 during the longitudinal movement of the vehicle. Referring to Figure 2, the faired protection 4 is provided on the front face of the footboard 3 which faces the flow of air as shown in Figures 2 and 3.
En référence maintenant aux figures schématiques 4 et 5, la protection carénée 4 s'étend sur toute la face avant du pied de caisse 3 de manière à ce que le flux d'air n'entre pas en contact frontal mais de manière progressive avec la protection carénée 4 qui protège le pied de caisse 3. Cette dernière se présente sous la forme d'une pièce s'étendant longitudinalement vers l'avant et comprenant deux faces latérales 41, 42 qui sont de préférence symétriques l'une par rapport à l'autre par rapport à un plan vertical et longitudinal passant par la protection carénée 4. En référence à la figure 5, les faces latérales 41, 42 de la protection carénée 4 sont profilées pour permettre une circulation du flux d'air minimisant la turbulence. Dans cet exemple, la section de la protection carénée 4, dans un plan horizontal, est croissante lorsque l'on déplace ledit plan horizontal verticalement en direction du plancher 10. De même, la section de la protection carénée 4 dans un plan vertical longitudinal est croissante lorsque l'on déplace ledit plan vertical longitudinal latéralement de l'extrémité latérale du plancher 10 vers l'intérieur du plancher 10 jusqu'à son plan de symétrie, puis décroissante depuis son plan de symétrie vers l'intérieur du plancher 10. Referring now to the schematic figures 4 and 5, the faired protection 4 extends over the entire front face of the stand 3 so that the flow of air does not come into frontal contact but gradually with the guarded protection 4 which protects the body foot 3. The latter is in the form of a piece extending longitudinally forwards and comprising two lateral faces 41, 42 which are preferably symmetrical with respect to the Another with respect to a vertical and longitudinal plane passing through the faired protection 4. With reference to FIG. 5, the lateral faces 41, 42 of the faired protection 4 are profiled to allow a circulation of the air flow minimizing the turbulence. In this example, the section of the faired protection 4, in a horizontal plane, is increasing when said horizontal plane is moved vertically towards the floor 10. Likewise, the section of the faired protection 4 in a longitudinal vertical plane is growing when moving said longitudinal vertical plane laterally from the lateral end of the floor 10 inwardly of the floor 10 to its plane of symmetry, then decreasing from its plane of symmetry towards the interior of the floor 10.
Toujours en référence à la figure 5, la protection carénée 4 comprend en outre une face d'extrémité 43 ménagée à son extrémité la plus éloignée du plancher 10 agencée pour former une face de transition entre les faces latérales 41, 42 de la protection 4 et une face inférieure horizontale 31 du pied de caisse 3. Autrement dit, la face d'extrémité 43 assure la continuité des surfaces avec les autres faces 41, 42, 31. Still with reference to FIG. 5, the faired protection 4 further comprises an end face 43 formed at its end farthest from the floor 10 arranged to form a transition face between the lateral faces 41, 42 of the protection 4 and a lower horizontal face 31 of the body foot 3. In other words, the end face 43 ensures the continuity of the surfaces with the other faces 41, 42, 31.
La face d'extrémité 43 de la protection carénée 4 permet une circulation fluide du flux d'air des faces latérales 41, 42 à la face d'extrémité 43 et de la face d'extrémité 43 vers la face inférieure horizontale 31 du pied de caisse 3. The end face 43 of the faired protection 4 allows a fluid circulation of the air flow from the lateral faces 41, 42 to the end face 43 and from the end face 43 to the horizontal lower face 31 of the foot of checkout 3.
Lors du déplacement du train, le flux d'air, généré par le déplacement du train, se déplace longitudinalement vers l'arrière du train et rencontre la protection carénée 4 dont les surfaces latérales 41, 42 dévient le flux d'air latéralement et dont la surface de fond 43 dévie le flux d'air vers la voie de circulation. Etant donné que la protection carénée 4 est plus épaisse au niveau de sa jonction avec le plancher 10, le flux d'air circule de manière fluide entre les faces latérales 41, 42 de la protection carénée 4 et le plancher 10. Autrement dit, les faces latérales 41, 42 assurent la continuité des surfaces avec la surface horizontale du plancher Ainsi, le flux d'air ne rencontre aucun obstacle aérodynamique important au niveau des pieds de caisse 3 du bogie moteur 2. L'invention a été ici présentée pour un unique pied de caisse 3 mais il va de soi qu'elle s'applique de manière similaire à plusieurs pieds de caisse latéralement opposés et/ou situés sur des bogies porteurs, par exemple, sous une voiture. During the movement of the train, the flow of air, generated by the movement of the train, moves longitudinally towards the rear of the train and meets the faired protection 4 whose lateral surfaces 41, 42 deflect the airflow laterally and whose the bottom surface 43 deflects the flow of air to the taxiway. Since the faired protection 4 is thicker at its junction with the floor 10, the air flow circulates fluidly between the side faces 41, 42 of the faired protection 4 and the floor 10. In other words, the lateral faces 41, 42 ensure the continuity of the surfaces with the horizontal surface of the floor Thus, the air flow does not encounter any significant aerodynamic obstacle at the feet of the body 3 of the engine bogie 2. The invention has been presented here for a single foot box 3 but it goes without saying that it applies similarly to several side feet laterally opposite and / or located on bogies carriers, for example, under a car.
Par ailleurs, la protection carénée 4 est ici rapportée sur le pied de caisse 3 mais il va de soi que le pied de caisse 3 et la protection carénée 4 pourraient former un élément monobloc. Furthermore, the faired protection 4 is here reported on the cash register 3 but it goes without saying that the cash register 3 and the faired protection 4 could form a unitary element.
Afin d'améliorer la circulation du flux d'air sous le plancher 10 à proximité du bogie moteur 2, on dispose une pluralité d'éléments discrets sous le plancher 10 du véhicule afin d'éviter que le bogie 2 n'entre en contact avec le flux d'air. In order to improve the circulation of the air flow under the floor 10 near the engine bogie 2, there is a plurality of discrete elements under the floor 10 of the vehicle to prevent the bogie 2 from coming into contact with the the air flow.
En effet, outre les inconvénients déjà cités pour les pieds de caisse 3, un bogie moteur 2 comprend de nombreux éléments dont la forme engendre des turbulences. Une deuxième forme de réalisation de l'invention est décrite en référence aux figures 6 à 9. Les références utilisées pour décrire les éléments de structure ou fonction identique, équivalente ou similaire à celles des éléments des figures 1 à 5 sont les mêmes, pour simplifier la description. D'ailleurs, l'ensemble de la description du premier mode de réalisation n'est pas repris, cette description s'appliquant aux éléments des figures 6 à 9 lorsqu'il n'y a pas d'incompatibilités. Seules les différences notables, structurelles et fonctionnelles, sont décrites. Indeed, in addition to the disadvantages already mentioned for the feet of the body 3, a bogie engine 2 comprises many elements whose shape generates turbulence. A second embodiment of the invention is described with reference to FIGS. 6 to 9. The references used to describe elements of structure or function that are identical, equivalent or similar to those of the elements of FIGS. 1 to 5 are the same, to simplify the description. Moreover, the entire description of the first embodiment is not repeated, this description applies to the elements of Figures 6 to 9 when there are no incompatibilities. Only notable differences, structural and functional, are described.
En référence à la figure 6, la motrice 1 comprend, outre les protections carénées 4, un bouclier de déviation d'air appelé étrave 20 et un râteau de déviation d'air 23 montés sous le plancher 10 en avant du bogie 2. Bouclier de déviation d'air (étrave) With reference to FIG. 6, the power unit 1 comprises, in addition to the keeled protections 4, an air deflection shield called a bow 20 and an air deflection rake 23 mounted under the floor 10 in front of the bogie 2. Air deflection shield (bow)
L'étrave 20 se présente sous la forme d'une enveloppe située en avant du bogie moteur 2, de préférence creuse, comprenant une partie de fond horizontale 21 et une partie latérale 19, formant un ensemble fermé, relié par son extrémité supérieure au plancher 10 de la motrice et par son extrémité inférieure à la partie de fond horizontale 21 comme représenté sur la figure 6. L'étrave 20 dévie le flux d'air latéralement, via sa partie latérale 19, et sous le plancher 10 du véhicule, via sa partie de fond horizontale 21. The bow 20 is in the form of a casing located in front of the bogie engine 2, preferably hollow, comprising a horizontal bottom portion 21 and a side portion 19, forming a closed assembly, connected by its upper end to the floor 10 of the powerhead and its lower end to the horizontal bottom portion 21 as shown in Figure 6. The bow 20 deflects the airflow laterally, via its side portion 19, and under the floor 10 of the vehicle, via its horizontal bottom portion 21.
En référence à la figure 6, en raison des évolutions technologiques, des modules opérationnels 7, tels que des modules de télécommunication, sont montés sous l'étrave 20 ce qui détériore son comportement aérodynamique. Referring to Figure 6, due to technological developments, operational modules 7, such as telecommunication modules, are mounted under the stem 20 which deteriorates its aerodynamic behavior.
Afin de limiter l'influence de tels modules opérationnels 7, un capot de lissage 22 est monté sous la partie de fond horizontale 21 de l'étrave 20, le capot de lissage 22 comprenant au moins une ouverture 24 de réception dudit module opérationnel 7 ménagée dans son enveloppe extérieure 25, le capot 22 étant dimensionné pour que ledit module opérationnel 7 puisse affleurer à l'enveloppe extérieure 25 du capot de lissage 22 lorsque celui-ci est monté sur le véhicule. In order to limit the influence of such operational modules 7, a smoothing cover 22 is mounted under the horizontal bottom portion 21 of the stem 20, the smoothing cover 22 comprising at least one opening 24 for receiving said operating module 7 arranged in its outer casing 25, the cover 22 being sized so that said operating module 7 can be flush with the outer casing 25 of the smoothing cap 22 when it is mounted on the vehicle.
En référence à la figure 6, le capot de lissage 22 se présente sous la forme d'un capot de forme sensiblement triangulaire isocèle dont la pointe du triangle est orientée vers l'avant de la motrice 1 et dont la médiane, issue de ladite pointe, s'étend longitudinalement dans la direction de déplacement du véhicule 1. Le capot de lissage 22 est sensiblement bombé et comprend une épaisseur verticale afin de pouvoir accueillir les modules opérationnels 7. Le capot de lissage 22 est relié directement à la paroi de fond 21 de l'étrave 20 de manière étanche afin que le flux d'air ne circule pas entre l'étrave 20 et le capot 22. Il va de soi que des ouvertures 24 de toutes formes pourraient convenir. With reference to FIG. 6, the smoothing hood 22 is in the form of a substantially triangular isosceles-shaped hood whose tip of the triangle is oriented towards the front of the motor 1 and whose median, issuing from said tip , extends longitudinally in the direction of movement of the vehicle 1. The smoothing cap 22 is substantially curved and comprises a vertical thickness in order to accommodate the operational modules 7. The smoothing cap 22 is connected directly to the bottom wall 21 of the bow 20 sealingly so that the flow of air does not circulate between the bow 20 and the cover 22. It goes without saying that openings 24 of any shape may be suitable.
L'enveloppe extérieure 25 du capot 22 comprend des ouvertures 24, de forme carrée sur la figure 7, pour recevoir les modules opérationnels 7. Les dimensions desdites ouvertures 24 sont adaptées de manière à ce que les modules soient affleurant à l'enveloppe extérieure 25 du capot de lissage 22 lorsque les modules 7 sont logés dans le capot de lissage 22. Le capot de lissage 22 est, dans cet exemple, profilé de l'avant vers l'arrière, son épaisseur étant croissante de l'avant vers l'arrière selon une pente sensiblement régulière de manière à ce que le flux d'air circulant sous le plancher 10, c'est-à- dire entre la voie de circulation du véhicule et son plancher 10, soit dévié progressivement par le capot de lissage 22 vers la voie de circulation afin d'éviter d'entrer en contact avec les modules opérationnels 7 et le bogie 2. Les modules opérationnels 7 étant intégrés au capot de lissage 22, le flux d'air circule d'avant en arrière sans turbulence. Le capot de lissage 22 vient lisser et permet de contrôler la circulation du flux d'air sur l'ensemble formé par le plancher 10, l'étrave 20 et les modules opérationnels 7, c'est pourquoi il est désigné capot de lissage 22. The outer casing 25 of the cover 22 comprises openings 24, of square shape in FIG. 7, for receiving the operational modules 7. The dimensions of said openings 24 are adapted so that the modules are flush with the outer casing 25. of the smoothing cover 22 when the modules 7 are housed in the smoothing cover 22. The smoothing cover 22 is, in this example, profiled from front to rear, its thickness being increasing from the front towards the rear according to a substantially regular slope so that the flow of air flowing under the floor 10, that is to say between the taxiway of the vehicle and its floor 10, is progressively deflected by the smoothing cap 22 to the taxiway to avoid coming into contact with the operational modules 7 and the bogie 2. The operational modules 7 being integrated in the smoothing cover 22, the air flow circulates back and forth without turbulence. The smoothing cap 22 smooths and controls the flow of air flow on the assembly formed by the floor 10, the bow 20 and the operational modules 7, which is why it is designated smoothing cover 22.
Il va de soi que le capot de lissage 22 pourrait être monté directement sous le plancher 10, sans étrave 20, les modules opérationnels 7 étant montés directement sous le plancher 10. It goes without saying that the smoothing cap 22 could be mounted directly under the floor 10, without bow 20, the operational modules 7 being mounted directly under the floor 10.
Râteau de déviation d'air Air deflection rake
En référence aux figures 7 et 8, le râteau 23 de déviation d'air se présente sous la forme d'un élément horizontal qui s'étend orthogonalement à la direction de déplacement longitudinale du véhicule. La section du râteau 23 de déviation d'air par un plan vertical et longitudinal se présente sous la forme d'un triangle rectangle. Autrement dit, le râteau de déviation d'air 23 comprend une face horizontale 29 de liaison reliée à la partie de fond 21 de l'étrave 20, une face arrière verticale 30 orientée vers l'arrière du véhicule et une face oblique 26 de déviation, correspondant à l'hypoténuse du triangle rectangle dont la section du râteau 23 à la forme, qui est oblique par rapport à la partie de fond 21 de l'étrave 20, le râteau 23 étant évasé de l'avant vers l'arrière du véhicule. With reference to FIGS. 7 and 8, the air deflection rake 23 is in the form of a horizontal element which extends orthogonally to the direction of longitudinal displacement of the vehicle. The section of the rake 23 of air deflection by a vertical and longitudinal plane is in the form of a right triangle. In other words, the air deflection rake 23 comprises a horizontal connecting face 29 connected to the bottom portion 21 of the bow 20, a vertical rear face 30 facing the rear of the vehicle and an oblique face 26 of deflection , corresponding to the hypotenuse of the right triangle whose section of the rake 23 to the shape, which is oblique with respect to the bottom portion 21 of the stem 20, the rake 23 being flared from the front to the rear of the vehicle.
L'arrête du râteau de déviation d'air 23, formée à l'intersection entre sa face de déviation 26 et sa face arrière 25, est crénelée de manière à ménager des dents 27 saillantes verticalement vers la voie de circulation et espacées les unes des autres par des cavités dont la surface de fond 28 est sensiblement oblique, comme représenté sur la figure 8, par rapport à la face horizontale 29 du râteau de déviation d'air 23. Comme cet élément de déviation d'air comprend une pluralité de dents 27, il est désigné râteau de déviation d'air 23. The stop of the air deflection rake 23, formed at the intersection between its deflection face 26 and its rear face 25, is crenellated so as to provide teeth 27 protruding vertically towards the taxiway and spaced apart from each other. others by cavities whose bottom surface 28 is substantially oblique, as shown in FIG. 8, with respect to the horizontal face 29 of the air deflection rake 23. As this air deflection element comprises a plurality of teeth 27, it is designated air deflection rake 23.
En référence à la figure 7, deux râteaux de déviation d'air 23 sont montés sous le plancher 10 du véhicule et décalés latéralement. Il va de soi qu'un unique râteau de déviation d'air de longueur plus importante (par exemple égale à la largeur du plancher 10) pourrait également convenir. Referring to Figure 7, two air deflection rakes 23 are mounted under the floor 10 of the vehicle and offset laterally. It goes without saying that a single air deflection rake of greater length (for example equal to the width of the floor 10) could also be suitable.
Au cours du déplacement du véhicule, le flux d'air circule entre la partie de fond 21 de l'étrave 20 et la voie de circulation. Les deux râteaux de déviation d'air 23 sont montés ici en avant du bogie moteur 2 de manière à détourner le flux d'air des éléments du bogie 2 susceptibles de générer des turbulences. En référence à la figure 7, chaque râteau de déviation d'air 23 est monté en avant de chacune des roues de l'essieu avant du bogie moteur 2. Ainsi, le flux d'air est dévié par la surface de déviation 26 du râteau de déviation d'air 23 vers la voie de circulation. Le flux d'air circule, en partie, entre les dents 27 du râteau de déviation d'air 23, ceci permet, en modifiant la structure de l'écoulement, de limiter les émissions sonores et le niveau de turbulence. During the movement of the vehicle, the air flow circulates between the bottom portion 21 of the bow 20 and the taxiway. The two air deflection rakes 23 are mounted here in front of the engine bogie 2 so as to divert the flow of air from the elements of the bogie 2 likely to generate turbulence. With reference to FIG. 7, each air deflection rake 23 is mounted in front of each of the wheels of the front axle of the engine bogie 2. Thus, the airflow is deflected by the deflection surface 26 of the air deflection rake 23 towards the taxiway. The flow of air circulates, in part, between the teeth 27 of the air deflection rake 23, this allows, by modifying the structure of the flow, to limit the noise emissions and the level of turbulence.
Les râteaux de déviation 23 sont des éléments carénés discrets améliorant le comportement aérodynamique dudit bogie 2 au cours du déplacement longitudinal du véhicule. En référence à la figure 9, les râteaux de déviation d'air 23 sont montés en partie sous le capot de lissage 22, seules les dents 27 des râteaux de déviation d'air 23 étant saillantes par rapport à l'enveloppe extérieure 25 du capot de lissage 22. Les râteaux de déviation d'air 23 sont dimensionnés de manière à ce que l'enveloppe extérieure 25 du capot de lissage 22 soit à la même hauteur que la surface de fond 28 des cavités des râteaux de déviation d'air 23. Autrement dit, l'enveloppe extérieure 25 du capot de lissage 22 est continue avec la surface de fond 28 des cavités ménagées entre les dents 27 des râteaux de déviation d'air 23. Ainsi, la circulation d'air n'est pas perturbée lors de sa circulation depuis le capot de lissage 22 vers le râteau de déviation d'air 23. The deflection rakes 23 are discrete faired elements improving the aerodynamic behavior of said bogie 2 during the longitudinal displacement of the vehicle. With reference to FIG. 9, the air deflection rakes 23 are mounted partially under the smoothing hood 22, only the teeth 27 of the air deflection rakes 23 being protruding with respect to the outer casing 25 of the hood The air deflection rakes 23 are dimensioned such that the outer casing 25 of the smoothing cap 22 is at the same height as the bottom surface 28 of the cavities of the air deflection rakes 23. In other words, the outer casing 25 of the smoothing cap 22 is continuous with the bottom surface 28 of the cavities formed between the teeth 27 of the air deflection rakes 23. Thus, the air circulation is not disturbed. during its circulation from the smoothing cap 22 to the air deflection rake 23.
Il a été ici décrit un râteau de déviation d'air 23 monté avec un capot de lissage 22 mais il va de soi que ces éléments pourraient être montés l'un sans l'autre. Une utilisation combinée permet néanmoins d'améliorer de manière significative le comportement aérodynamique de la motrice. It has been described here an air deflection rake 23 mounted with a smoothing cap 22 but it goes without saying that these elements could be mounted one without the other. Combined use nevertheless makes it possible to significantly improve the aerodynamic behavior of the motor.
Il va de soi que les râteaux de déviation d'air 23 pourraient être montés directement sous le plancher 10 sans étrave 20, la face horizontale de liaison 29 de chaque râteau de déviation d'air 23 étant reliée directement au plancher 10. Les éléments carénés discrets sont montés en avant du bogie moteur 2 de manière à diminuer son impact aérodynamique sur le comportement global de la motrice 1. De préférence, les éléments carénés sont montés de manière à dévier tout flux d'air se dirigeant vers le bogie moteur 2. A cet effet, la projection orthogonale des éléments carénés discrets, dans un plan transversal à la direction de déplacement longitudinale du véhicule, présente un contour global quasi- ininterrompu et de préférence, ininterrompu. It goes without saying that the air deflection rakes 23 could be mounted directly under the floor 10 without bow 20, the horizontal connecting face 29 of each air deflection rake 23 being connected directly to the floor 10. The discrete faired elements are mounted in front of the engine bogie 2 so as to reduce its aerodynamic impact on the overall behavior of the engine 1. Preferably, the faired elements are mounted so as to deflect any flow of air towards the bogie 2. To this end, the orthogonal projection of the discrete faired elements, in a plane transverse to the longitudinal direction of movement of the vehicle, has a global contour almost uninterrupted and preferably uninterrupted.
On entend par contour global quasi-ininterrompu que le contour de chacun des éléments carénés discrets est distant des contours des autres éléments carénés par une distance faible, de préférence inférieur à 10 cm. Ainsi, le bogie moteur 2 est protégé de manière globale par une pluralité d'éléments discrets locaux, les éléments discrets étant décalés latéralement et longitudinalement par rapport à la direction longitudinale de déplacement du véhicule. The term "near-uninterrupted overall contour" is understood to mean that the contour of each of the discrete faired elements is distant from the contours of the other elements careened by a small distance, preferably less than 10 cm. Thus, the motor bogie 2 is globally protected by a plurality of local discrete elements, the discrete elements being offset laterally and longitudinally with respect to the longitudinal direction of movement of the vehicle.
En effet, bien que les éléments carénés discrets soient distants les uns des autres et disjoints, ils sont répartis de manière à former un contour global ininterrompu vis-à-vis du flux d'air circulant de l'avant vers l'arrière. Ainsi, le contour global des éléments carénés discrets est le même que celui d'un élément caréné global vis-à-vis du flux d'air, les éléments carénés discrets ayant l'avantage d'autoriser les opérations de maintenance du fait de leur espacement. Grâce à cette protection discrète, les bruits engendrés par le déplacement du véhicule sont atténués et le comportement aérodynamique du véhicule est amélioré. Indeed, although the discrete faired elements are distant from each other and disjoint, they are distributed so as to form an uninterrupted overall contour vis-à-vis the flow of air flowing from front to rear. Thus, the overall contour of the discrete faired elements is the same as that of a global ducted element vis-à-vis the air flow, the discrete faired elements having the advantage of allowing maintenance operations because of their spacing. Thanks to this discreet protection, the noises generated by the movement of the vehicle are attenuated and the aerodynamic behavior of the vehicle is improved.
L'invention a été décrite pour un véhicule ferroviaire du type train TGV® mais il va de soi que l'invention s'applique à tout type de véhicule ferroviaire, comme par exemple, un train du type AGV® pour Automotrice à Grande Vitesse comprenant une rame intégralement articulée ou un train du type ICE3® comprenant une rame automotrice à motorisation répartie. The invention has been described for a railway vehicle of the TGV® train type, but it goes without saying that the invention applies to any type of railway vehicle, such as for example, an AGV® type train for high speed railcar comprising an entirely articulated train or a train of the ICE3® type comprising a self-propelled train with distributed motorization.

Claims

Revendications claims
1. Véhicule ferroviaire (1) comprenant un plancher (10) sous lequel est monté au moins un bogie (2) de support du véhicule destiné à circuler sur une voie de circulation, véhicule caractérisé par le fait qu'il comprend des éléments carénés discrets (4, 21, 22, 23), montés sous le plancher (10) et agencés pour améliorer le comportement aérodynamique dudit bogie (2) au cours du déplacement longitudinal du véhicule (1). 1. Railway vehicle (1) comprising a floor (10) under which is mounted at least one bogie (2) for supporting the vehicle intended to circulate on a taxiway, vehicle characterized in that it comprises discrete streamlined elements (4, 21, 22, 23), mounted under the floor (10) and arranged to improve the aerodynamic behavior of said bogie (2) during the longitudinal movement of the vehicle (1).
2. Véhicule selon la revendication 1, dans lequel les éléments carénés discrets (4, 21, 22, 23) sont décalés transversalement les uns par rapport aux autres dans un plan transversal à la direction de déplacement longitudinale du véhicule. 2. Vehicle according to claim 1, wherein the discrete faired elements (4, 21, 22, 23) are shifted transversely relative to each other in a plane transverse to the direction of longitudinal displacement of the vehicle.
3. Véhicule selon l'une des revendications 1 à 2, dans lequel la projection orthogonale des éléments carénés discrets (4, 21, 22, 23), dans un plan transversal à la direction de déplacement longitudinale du véhicule, présente un contour global ininterrompu. 3. Vehicle according to one of claims 1 to 2, wherein the orthogonal projection of the discrete faired elements (4, 21, 22, 23), in a plane transverse to the longitudinal direction of movement of the vehicle, has an uninterrupted overall contour. .
4. Véhicule selon l'une des revendications 1 à 3, dans lequel le bogie est relié au plancher (10) du véhicule par un dispositif anti-lacet, le véhicule comprenant une protection carénée (4) montée sur ledit dispositif antilacet. 4. Vehicle according to one of claims 1 to 3, wherein the bogie is connected to the floor (10) of the vehicle by an anti-yaw device, the vehicle comprising a faired protection (4) mounted on said anti-lock device.
5. Véhicule selon la revendication 4, dans lequel le dispositif anti-lacet comprend un amortisseur (5) relié, à une première extrémité, au bogie (2), et, à une deuxième extrémité, à un pied de caisse (3) solidaire du plancher (10), la protection carénée (4) étant montée sur la face avant du pied de caisse (3). 5. Vehicle according to claim 4, wherein the anti-yaw device comprises a damper (5) connected at a first end to the bogie (2), and at a second end, to a footboard (3) solidaire of the floor (10), the fairing protection (4) being mounted on the front face of the footboard (3).
6. Véhicule selon l'une des revendications 4 à 5 dans lequel la protection carénée (4) comprend deux faces latérales symétriques (41, 42) par rapport à un plan longitudinal passant par ladite protection carénée (4). 6. Vehicle according to one of claims 4 to 5 wherein the faired protection (4) comprises two symmetrical side faces (41, 42) relative to a longitudinal plane passing through said faired protection (4).
7. Véhicule selon l'une des revendications 4 à 6 dans lequel la protection carénée (4) possède une section croissante en direction du plancher (10), de préférence évasée verticalement vers le plancher du véhicule (10). 7. Vehicle according to one of claims 4 to 6 wherein the faired protection (4) has a growing section towards the floor (10), preferably flared vertically towards the floor of the vehicle (10).
8. Véhicule selon l'une des revendications 1 à 7, le véhicule (1) circulant de l'arrière vers l'avant, le véhicule (1) comprenant au moins un râteau (23) de déviation d'air monté sous le plancher (10) en avant du bogie (2) et agencé pour guider un flux d'air longitudinal entre le bogie (2) et la voie de circulation. 8. Vehicle according to one of claims 1 to 7, the vehicle (1) flowing from the rear to the front, the vehicle (1) comprising at least one rake (23) air deflection mounted under the floor (10) in front of the bogie (2) and arranged to guide a longitudinal air flow between the bogie (2) and the taxiway.
9. Véhicule selon la revendication 8, dans lequel le râteau de déviation d'air (23) est monté sous le plancher du véhicule (10) et s'étend orthogonalement à la direction de déplacement longitudinale du véhicule. 9. Vehicle according to claim 8, wherein the air deflection rake (23) is mounted under the floor of the vehicle (10) and extends orthogonally to the direction of longitudinal displacement of the vehicle.
10. Véhicule selon l'une des revendications 8 à 9, dans lequel le râteau de déviation d'air (23) se présente sous la forme d'un élément caréné de section triangulaire dont une arrête est crénelée. 10. Vehicle according to one of claims 8 to 9, wherein the air deflection rake (23) is in the form of a shrouded element of triangular section, a stop is crenelated.
1 1. Véhicule selon l'une des revendications 1 à 10, comprenant au moins un module opérationnel (7) monté sous le plancher du véhicule (10), véhicule dans lequel un capot de lissage (22) est monté sous le plancher du véhicule (10), le capot (22) comprenant au moins une ouverture (24) de réception dudit module opérationnel (7) ménagée dans son enveloppe extérieure (25), le capot (22) étant dimensionné de manière à ce que ledit module opérationnel (7) affleure à l'enveloppe extérieure (25) du capot (22). 1 1. Vehicle according to one of claims 1 to 10, comprising at least one operational module (7) mounted under the floor of the vehicle (10), vehicle in which a smoothing cap (22) is mounted under the floor of the vehicle (10), the cover (22) comprising at least one opening (24) for receiving said operational module (7) formed in its outer casing (25), the cover (22) being dimensioned so that said operating module (7) is flush with the outer casing (25) of the cover (22).
12. Véhicule selon l'une des revendications 1 à 1 1, dans lequel les éléments carénés discrets (4, 21, 22, 23) sont montés en avant du bogie (2). 12. Vehicle according to one of claims 1 to 1 1, wherein the discrete faired elements (4, 21, 22, 23) are mounted in front of the bogie (2).
PCT/EP2011/054233 2010-03-31 2011-03-21 Rail vehicle with a bogie comprising discrete streamlined elements designed to improve the aerodynamic performance of said bogie WO2011120834A1 (en)

Priority Applications (2)

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EP11709134A EP2552760A1 (en) 2010-03-31 2011-03-21 Rail vehicle with a bogie comprising discrete streamlined elements designed to improve the aerodynamic performance of said bogie
MA35292A MA34148B1 (en) 2010-03-31 2011-03-21 RAIL VEHICLE WITH A BOGIE COMPRISING DISCRETE CARENED ELEMENTS ARRANGED TO IMPROVE THE AERODYNAMIC BEHAVIOR OF THE SAID BOGIE.

Applications Claiming Priority (2)

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FR1052375 2010-03-31
FR1052375A FR2958247B1 (en) 2010-03-31 2010-03-31 RAILWAY VEHICLE WITH A BOGIE COMPRISING DISCRETE CARENED ELEMENTS AGENCIES FOR IMPROVING THE AERODYNAMIC BEHAVIOR OF THE SAID BOGIE

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AR (1) AR080424A1 (en)
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EP2676858A1 (en) * 2012-06-22 2013-12-25 Société Nationale des Chemins De Fer Français - SNCF Railway vehicle body structure with improved flow of air under body
FR2992278A1 (en) * 2012-06-22 2013-12-27 Sncf BODY STRUCTURE OF RAILWAY VEHICLE WITH IMPROVED AIR FLOW UNDERBOARD
CN103802848A (en) * 2012-11-08 2014-05-21 南车青岛四方机车车辆股份有限公司 Hood structure of high speed train headstock and installation method
WO2017140448A1 (en) * 2016-02-18 2017-08-24 Siemens Aktiengesellschaft Vehicle
EP3266669A1 (en) * 2016-07-07 2018-01-10 SNCF Mobilités Rail transport vehicle with air curtains
FR3053652A1 (en) * 2016-07-07 2018-01-12 Sncf Mobilites RAIL TRANSPORT VEHICLE EQUIPPED WITH AIR CURTAINS
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EP3628562A1 (en) * 2018-09-27 2020-04-01 Hitachi, Ltd. Railway vehicle
CN109968993A (en) * 2018-12-04 2019-07-05 中车青岛四方机车车辆股份有限公司 Bottom guiding device, magnetic-levitation train, bottom guiding device control method and device
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CN109747676A (en) * 2019-02-27 2019-05-14 中车青岛四方车辆研究所有限公司 Rail vehicle truck and rail vehicle with eddy current braking device
US20220154796A1 (en) * 2019-06-20 2022-05-19 Crrc Qingdao Sifang Co., Ltd. Active control type anti-yaw damper, damping system and vehicle
US11859689B2 (en) * 2019-06-20 2024-01-02 Crrc Qingdao Sifang Co., Ltd. Active control type anti-yaw damper, damping system and vehicle
JP7389325B2 (en) 2019-09-12 2023-11-30 日本製鉄株式会社 Railway vehicles and trains

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AR080424A1 (en) 2012-04-04
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FR2958247A1 (en) 2011-10-07
EP2552760A1 (en) 2013-02-06

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