EP1054500A1 - Ventilation device for railway traction motor - Google Patents

Ventilation device for railway traction motor Download PDF

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Publication number
EP1054500A1
EP1054500A1 EP00401224A EP00401224A EP1054500A1 EP 1054500 A1 EP1054500 A1 EP 1054500A1 EP 00401224 A EP00401224 A EP 00401224A EP 00401224 A EP00401224 A EP 00401224A EP 1054500 A1 EP1054500 A1 EP 1054500A1
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EP
European Patent Office
Prior art keywords
flow
air
stator
motor
enclosure
Prior art date
Legal status (The legal status 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 status listed.)
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EP00401224A
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German (de)
French (fr)
Inventor
Alain Cassagnou
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Alstom SA
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Alstom SA
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Publication of EP1054500A1 publication Critical patent/EP1054500A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases

Definitions

  • the invention relates to a ventilation device and to an electric railway traction motor equipped with such device.
  • an engine electric In the railway traction sector, an engine electric is generally integrated at the level of a bogie, under the body of a powerplant or a car. Like an engine electric can consume significant electrical power, it needs to be cooled to dissipate some of this power and it is known to use the ambient atmosphere to do this.
  • the engine environment of rail traction is generally polluted, on the one hand to cause of waste that may be on the track and other leaves because of rain or mud resulting from conditions inclement weather.
  • the invention relates to a device for ventilation of an electric railway traction motor comprising a centrifugal fan capable of rotating in a or two directions, arranged in an air inlet chamber and delivering air towards the motor, characterized in that the air flow from the fan is divided into one internal flow, directed towards the interior of an enclosure of containment containing at least the motor rotor, and a flow external, directed to stator cooling channels of the motor.
  • the air flow discharged by the inlet fan is used to cool both the rotor and stator of the engine, the most air part likely to be polluted by relatively small particles heavy being directed, under the effect of centrifugal forces, outward, i.e. to the cooling channels of the stator, while the least polluted part which constitutes the internal flow can be directed inward of the containment, without major risk of fouling internal motor.
  • the invention also relates to an electric motor for rail traction equipped with a ventilation device such as previously described.
  • a ventilation device such as previously described.
  • Such an engine works so very satisfactory, including in a polluted environment, and its particularly efficient cooling allows to consider making an engine according to the invention of great power in a relatively small footprint.
  • the motor 1 represented in FIG. 1 comprises a shaft central 2 supported by bearings 3 and 4 and on which is mounted a rotor 5.
  • X-X the longitudinal axis of the shaft 2 which is the axis of rotation of the rotor 5.
  • a stator 8 centered on the axis XX ', is arranged radially around the rotor 5 and equipped with a coil 9. Note e between the iron between the rotor 5 and the stator 8.
  • a flange 11 supports the bearing 3 and is connected to a flange 12 secured to the stator 8.
  • the flange 12 is connected by screws 16 to a tubing 17 defining an inlet orifice 18 for the air from cooling of the motor 1 and supporting the bearing 4.
  • Tubing 17 includes an outer casing portion 20 and an inner envelope part 21 defining between they an internal volume V of the tube 17, the opening 18 being provided in part 20, while the bearing 4 is integral with part 21.
  • a grid 22 is provided in the opening 18 and makes it possible to block waste such as paper or plant leaves that would tend to enter the tubing 17 through the orifice 18.
  • a fan 25 which is noted that the blades are radial, is mounted at one end 2a of the shaft 2, inside an air inlet chamber C formed in the manifold 17 between the grid 22 and the internal part 21.
  • these form an enclosure E for confining the rotor 5, a part of the shaft 2, an internal part 8 a of the stator 8 , distant from the axis XX 'by a distance less than a radius R corresponding approximately to the maximum internal radius R 21 of the part 21 and of the coil 9.
  • the enclosure E therefore makes it possible to protect the elements 5, 8 a and 9 the ambient atmosphere and, in particular, dust.
  • the air flow F 1 penetrating through the orifice 18 in the tube 17 is discharged by the fan 24 both in the direction of the interior of the enclosure E and towards the stator 8, as represented respectively by the air flows F 2 and F 3 .
  • the internal air flow F 2 passes through openings 26 formed in part 21 of the pipe 17, these openings being distributed around the axis XX ′.
  • the air flow F 2 entering the enclosure E is divided into two air flows, F 4 and F 5 .
  • the air flow F 4 passes through channels 27 provided in the rotor 5 parallel to the axis XX ′, which effectively cools the rotor 5.
  • the air flow F 5 passes through the air gap e between the rotor 5 and the stator 8 and licks the stator.
  • the air circulation inside the enclosure E is assisted by a second fan 28 mounted on the shaft 2 inside the enclosure E and whose blades 29 create a stirring movement of the air from the openings 26 and in the direction of several outlet orifices 30 formed in the flange 12.
  • the arrows F 6 and F 7 show the flow of cooling air in the downstream part and at the outlet of the enclosure E, which results from the union of the air flows F 4 and F 5 .
  • the air flow F 3 is, for its part, directed towards channels 31 provided in the stator 8 radially outside the part 8 a .
  • These channels 31 can be regularly distributed around the axis XX 'or located in certain sectors, in particular in the case where the stator has a polygonal external contour.
  • the channels 31 are formed in four external zones of the section of the stator.
  • the air flow F 3 makes it possible to cool the stator 8 and opens out at F 8 through an outlet orifice 32 provided at the downstream end each channel 31 in the flange 12, near the orifices 30.
  • a rib 33 is provided in the vicinity of each orifice 32 to deflect the flow F 8 and thus avoid creating a back pressure at the level of the neighboring orifice 30.
  • the second air flow F 3 follows a path, defined by the pipe 17 and the channels 31, which is radially outside that followed by the first air flow F 2 , it is more loaded with impurities, which are relatively heavy and are centrifuged by the fan 17, which is not particularly troublesome because the channels 31 are separated from the internal volume of the motor defined by the enclosure E and because their section is large enough to allow its flow.
  • the channels 31 are generally rectilinear, so that the flow F 3 is not hampered in its flow, the impurities having little tendency to deposit in the channels 31.
  • the air flow F 2 is relatively clean because the openings 26 are located radially inside the area of radius R, that is to say inside the path of the second air flow .
  • the openings 26 are substantially perpendicular to the air flow F 3 in the zone under consideration of the pipe 17, the flow F 3 constituting the main flow flow, so that the impurities preferentially follow the path of the flow F 3 .
  • the air circulating in the enclosure E is relatively clean and does not risk fouling the rotating parts of the motor 1 or accumulating in the air gap e or in the winding 9, even if the flow path d air F 4 to F 6 in enclosure E is relatively tortuous.
  • the cooling obtained is of very good quality because the entire flow F 1 is used for cooling the motor 1.
  • the diameter of the fan 1 can therefore be reduced compared to the devices in the state of the technique, which consequently reduces the noise emitted by this fan.
  • the grid 22 may have a relatively large mesh, which reduces losses of induced charge and there is no need to perform a regular maintenance of a filter element such as those equipping certain prior art engines.
  • the invention is applicable regardless of the exact type of motor 1, which can be synchronous or asynchronous, of the type exact of fan 24 which can be able to rotate in a single direction or in both directions around the axis XX ', of the type carcass of the engine which may, in particular, be formed by a packet of sheets and fitted in a massive ferrule with, possibly external fins.
  • the flange 12 can be made in several pieces, in particular to facilitate the installation of the stator 8.

Abstract

Cooling air which has passed through a screen (22) is propelled by a centrifugal fan (24) on the main motor shaft through the rotor (5) using ducts (27) and also through the stator (8) which has larger rectangular ducts (31). A second centrifugal fan (28) also mounted on the main motor shaft assists in expelling the rotor air (F6) to atmosphere (F7) through ducts shared with the stator air (F8)

Description

L'invention a trait à un dispositif de ventilation et à un moteur électrique de traction ferroviaire équipé d'un tel dispositif.The invention relates to a ventilation device and to an electric railway traction motor equipped with such device.

Dans le domaine de la traction ferroviaire, un moteur électrique est généralement intégré au niveau d'un bogie, sous la caisse d'une motrice ou d'une voiture. Comme un moteur électrique peut consommer une puissance électrique importante, il doit être refroidi pour dissiper une partie de cette puissance et il est connu d'utiliser l'atmosphère ambiante pour ce faire. Cependant, l'environnement des moteurs de traction ferroviaire est généralement pollué, d'une part à cause des déchets pouvant se trouver sur la voie et d'autre part à cause de la pluie ou de la boue résultant de conditions météorologiques défavorables. Pour les raisons qui précèdent, il est connu de protéger un moteur électrique de son environnement en disposant des filtres ou grilles sur les entrées d'air de refroidissement. Il est également connu d'aspirer l'air de refroidissement du moteur, à travers une gaine, dans une zone de pollution réduite, telle qu'un compartiment intérieur du train ou une zone située au niveau de la toiture d'une motrice. Ces mesures induisent des pertes de charge importantes sur le trajet d'écoulement de l'air de refroidissement, ce qui diminue son efficacité et peut conduire à un encrassement du moteur.In the railway traction sector, an engine electric is generally integrated at the level of a bogie, under the body of a powerplant or a car. Like an engine electric can consume significant electrical power, it needs to be cooled to dissipate some of this power and it is known to use the ambient atmosphere to do this. However, the engine environment of rail traction is generally polluted, on the one hand to cause of waste that may be on the track and other leaves because of rain or mud resulting from conditions inclement weather. For the above reasons, it is known to protect an electric motor from its environment by having filters or grids on the inputs cooling air. It is also known to aspire engine cooling air, through a duct, into a reduced pollution zone, such as a compartment interior of the train or an area located on the roof a motor. These measures induce pressure losses important on the cooling air flow path, which decreases its effectiveness and can lead to engine clogging.

Par le document FR-A-2 645 818, il est connu de ventiler un moteur de traction ferroviaire au moyen de l'air refoulé par un ventilateur, une partie de cet air étant évacué par centrifugation dans une ouverture en regard de laquelle est disposé un élément séparateur. Les particules les plus lourdes sont évacuées sous l'effet des forces centrifuges et ne sont donc pas envoyées vers le volume interne du moteur. Cependant, l'efficacité de la centrifugation dépend essentiellement de la vitesse de rotation du ventilateur d'entrée qui est liée à la vitesse de fonctionnement du moteur. Cette vitesse dépend des conditions d'utilisation du moteur, un moteur pouvant tourner le plus souvent à faible régime, notamment pour un véhicule ferroviaire urbain, du type tramway ou trolley. De plus, l'air évacué par l'ouverture périphérique ne participe pas au refroidissement et des émissions sonores peuvent être générées par le refoulement d'une partie du flux d'air directement vers l'atmosphère ambiante.By document FR-A-2 645 818, it is known to ventilate a rail traction motor by means of exhaust air by a fan, part of this air being exhausted by centrifugation in an opening opposite which is arranged a separating element. The heaviest particles are evacuated by centrifugal forces and are not therefore not sent to the internal volume of the motor. However, the efficiency of centrifugation essentially depends on the speed of rotation of the input fan which is linked at the engine operating speed. This speed depends conditions of use of the engine, an engine being able to most often run at low speed, especially for a urban rail vehicle, of the tram or trolley type. Of more, the air evacuated by the peripheral opening does not participate not cooling and noise emissions may be generated by the discharge of part of the air flow directly to the ambient atmosphere.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un dispositif de ventilation dans lequel la totalité de l'air refoulé par un ventilateur est mise à profit pour le refroidissement du moteur alors que les risques d'encrassement ou de pollution sont minimisés.It is to these disadvantages that we hear more particularly remedy the invention by proposing a ventilation device in which all of the air discharged by a fan is used to cool the engine while the risk of fouling or pollution is minimized.

Dans cet esprit, l'invention concerne un dispositif de ventilation d'un moteur électrique de traction ferroviaire comprenant un ventilateur centrifuge apte à tourner dans un ou deux sens, disposé dans une chambre d'entrée d'air et refoulant de l'air en direction du moteur, caractérisé en ce que le flux d'air refoulé par le ventilateur est divisé en un flux interne, dirigé vers l'intérieur d'une enceinte de confinement renfermant au moins le rotor du moteur, et un flux externe, dirigé vers des canaux de refroidissement du stator du moteur.In this spirit, the invention relates to a device for ventilation of an electric railway traction motor comprising a centrifugal fan capable of rotating in a or two directions, arranged in an air inlet chamber and delivering air towards the motor, characterized in that the air flow from the fan is divided into one internal flow, directed towards the interior of an enclosure of containment containing at least the motor rotor, and a flow external, directed to stator cooling channels of the motor.

Grâce à l'invention, le flux d'air refoulé par le ventilateur d'entrée est utilisé pour refroidir à la fois le rotor et le stator du moteur, la partie de l'air la plus susceptible d'être polluée par des particules relativement lourdes étant dirigée, sous l'effet des forces centrifuges, vers l'extérieur, c'est-à-dire vers les canaux de refroidissement du stator, alors que la partie la moins polluée qui constitue le flux interne peut être dirigée vers l'intérieur de l'enceinte de confinement, sans risque majeur d'encrassement interne du moteur.Thanks to the invention, the air flow discharged by the inlet fan is used to cool both the rotor and stator of the engine, the most air part likely to be polluted by relatively small particles heavy being directed, under the effect of centrifugal forces, outward, i.e. to the cooling channels of the stator, while the least polluted part which constitutes the internal flow can be directed inward of the containment, without major risk of fouling internal motor.

Selon des aspects avantageux mais non obligatoires de l'invention, le dispositif incorpore une ou plusieurs des caractéristiques suivantes :

  • Le ventilateur refoule dans une tubulure d'alimentation des canaux, une cloison de séparation du volume interne de cette tubulure et de l'enceinte de confinement étant percée d'au moins une ouverture de communication permettant la circulation du premier flux. On peut prévoir plusieurs ouvertures de communication entre le volume interne de la tubulure et l'enceinte, ces ouvertures étant sensiblement régulièrement réparties autour d'un axe central du moteur. On peut également prévoir que cette ou ces ouvertures sont formées radialement à l'intérieur du trajet défini par la tubulure pour le second flux. Grâce à cet aspect de l'invention, le premier flux d'air de refroidissement dirigé vers l'enceinte est "prélevé" sur le flux dirigé vers les canaux de refroidissement du stator, ce prélèvement ayant lieu sur une face interne de la tubulure dont l'air le plus pollué, c'est-à-dire chargé en particules relativement lourdes, est le plus éloigné.
  • Il est prévu au moins une ouverture de sortie de l'enceinte pour le premier flux d'air. Cette ouverture de sortie peut être aménagée à proximité du débouché d'un canal de refroidissement du stator. Dans ce cas, une nervure de séparation des flux d'air sortant de cette ouverture et de ce canal est avantageusement prévue.
  • Un second ventilateur génère ou assiste un écoulement d'air à l'intérieur de l'enceinte de confinement, à partir du flux interne. Ce second ventilateur augmente les mouvements de l'air dans l'enceinte de confinement et améliore ainsi l'efficacité du refroidissement des éléments contenus dans cette enceinte.
  • L'enceinte de confinement renferme le rotor, une partie centrale interne du stator, au moins un bobinage associé à ce stator ou à ce rotor, une partie de l'arbre central du moteur et, éventuellement, un second ventilateur. L'ensemble des éléments précités est ainsi refroidi par le premier flux d'air.
According to advantageous but not compulsory aspects of the invention, the device incorporates one or more of the following characteristics:
  • The fan discharges into a supply pipe of the channels, a partition separating the internal volume of this pipe and the containment being pierced with at least one communication opening allowing the circulation of the first flow. Several communication openings can be provided between the internal volume of the tubing and the enclosure, these openings being substantially regularly distributed around a central axis of the engine. It can also be provided that this or these openings are formed radially inside the path defined by the tubing for the second flow. Thanks to this aspect of the invention, the first flow of cooling air directed towards the enclosure is "withdrawn" from the flow directed towards the cooling channels of the stator, this withdrawal taking place on an internal face of the tubing of which the most polluted air, that is to say loaded with relatively heavy particles, is the most distant.
  • At least one enclosure outlet opening is provided for the first air flow. This outlet opening can be arranged near the outlet of a stator cooling channel. In this case, a rib for separating the air flows leaving this opening and this channel is advantageously provided.
  • A second fan generates or assists an air flow inside the confinement enclosure, from the internal flow. This second fan increases the movements of the air in the confinement enclosure and thus improves the cooling efficiency of the elements contained in this enclosure.
  • The confinement enclosure contains the rotor, an internal central part of the stator, at least one winding associated with this stator or this rotor, a part of the central shaft of the motor and, optionally, a second fan. All of the above elements are thus cooled by the first air flow.

L'invention concerne également un moteur électrique de traction ferroviaire équipé d'un dispositif de ventilation tel que précédemment décrit. Un tel moteur fonctionne de façon très satisfaisante, y compris dans un environnement pollué, et son refroidissement particulièrement efficace permet d'envisager de réaliser un moteur conforme à l'invention de grande puissance dans un encombrement relativement réduit.The invention also relates to an electric motor for rail traction equipped with a ventilation device such as previously described. Such an engine works so very satisfactory, including in a polluted environment, and its particularly efficient cooling allows to consider making an engine according to the invention of great power in a relatively small footprint.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre de deux modes de réalisation d'un moteur de traction ferroviaire équipé d'un dispositif de ventilation conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • La figure 1 est une coupe longitudinale d'un moteur de traction ferroviaire conforme à un premier mode de réalisation de l'invention et
  • La figure 2 est une coupe analogue à la figure 1 pour un moteur de traction ferroviaire conforme à un second mode de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a rail traction motor equipped with a ventilation device in accordance with its principle , given solely by way of example and with reference to the appended drawings in which:
  • FIG. 1 is a longitudinal section of a railway traction motor according to a first embodiment of the invention and
  • Figure 2 is a section similar to Figure 1 for a railway traction motor according to a second embodiment of the invention.

Le moteur 1 représenté à la figure 1 comprend un arbre central 2 supporté par des paliers 3 et 4 et sur lequel est monté un rotor 5.The motor 1 represented in FIG. 1 comprises a shaft central 2 supported by bearings 3 and 4 and on which is mounted a rotor 5.

On note X-X' l'axe longitudinal de l'arbre 2 qui est l'axe de rotation du rotor 5.We denote X-X 'the longitudinal axis of the shaft 2 which is the axis of rotation of the rotor 5.

Un stator 8, centré sur l'axe X-X', est disposé radialement autour du rotor 5 et équipé d'un bobinage 9. On note e l'entre-fer entre le rotor 5 et le stator 8.A stator 8, centered on the axis XX ', is arranged radially around the rotor 5 and equipped with a coil 9. Note e between the iron between the rotor 5 and the stator 8.

Un flasque 11 supporte le palier 3 et est relié à une bride 12 solidaire du stator 8.A flange 11 supports the bearing 3 and is connected to a flange 12 secured to the stator 8.

D'autre part, la bride 12 est reliée par des vis 16 à une tubulure 17 définissant un orifice d'entrée 18 pour l'air de refroidissement du moteur 1 et supportant le palier 4.On the other hand, the flange 12 is connected by screws 16 to a tubing 17 defining an inlet orifice 18 for the air from cooling of the motor 1 and supporting the bearing 4.

La tubulure 17 comprend une partie d'enveloppe externe 20 et une partie d'enveloppe interne 21 définissant entre elles un volume interne V de la tubulure 17, l'ouverture 18 étant ménagée dans la partie 20, alors que le palier 4 est solidaire de la partie 21. Une grille 22 est prévue dans l'ouverture 18 et permet de bloquer des déchets tels que des papiers ou des feuilles de végétaux qui auraient tendance à pénétrer dans la tubulure 17 par l'orifice 18.Tubing 17 includes an outer casing portion 20 and an inner envelope part 21 defining between they an internal volume V of the tube 17, the opening 18 being provided in part 20, while the bearing 4 is integral with part 21. A grid 22 is provided in the opening 18 and makes it possible to block waste such as paper or plant leaves that would tend to enter the tubing 17 through the orifice 18.

Un ventilateur 24, dont on note 25 les aubes qui sont radiales, est monté à une extrémité 2a de l'arbre 2, à l'intérieur d'une chambre d'entrée d'air C formée dans la tubulure 17, entre la grille 22 et la partie interne 21.24 a fan 25 which is noted that the blades are radial, is mounted at one end 2a of the shaft 2, inside an air inlet chamber C formed in the manifold 17 between the grid 22 and the internal part 21.

Compte tenu de la forme et de la disposition des éléments 11, 12 et 21, ceux-ci forment une enceinte E de confinement du rotor 5, d'une partie de l'arbre 2, d'une partie interne 8a du stator 8, distante de l'axe X-X' d'une distance inférieure à un rayon R correspondant approximativement au rayon interne maximum R21 de la partie 21 et du bobinage 9. L'enceinte E permet donc de protéger les éléments 5, 8a et 9 de l'atmosphère ambiante et, notamment, des poussières.Given the shape and arrangement of the elements 11, 12 and 21, these form an enclosure E for confining the rotor 5, a part of the shaft 2, an internal part 8 a of the stator 8 , distant from the axis XX 'by a distance less than a radius R corresponding approximately to the maximum internal radius R 21 of the part 21 and of the coil 9. The enclosure E therefore makes it possible to protect the elements 5, 8 a and 9 the ambient atmosphere and, in particular, dust.

Conformément à l'invention, le flux d'air F1 pénétrant par l'orifice 18 dans la tubulure 17 est refoulé par le ventilateur 24 à la fois en direction de l'intérieur de l'enceinte E et vers le stator 8, comme représenté respectivement par les flux d'air F2 et F3.According to the invention, the air flow F 1 penetrating through the orifice 18 in the tube 17 is discharged by the fan 24 both in the direction of the interior of the enclosure E and towards the stator 8, as represented respectively by the air flows F 2 and F 3 .

Le flux d'air interne F2 traverse des ouvertures 26 ménagées dans la partie 21 de la tubulure 17, ces ouvertures étant réparties autour de l'axe X-X'. Le flux d'air F2 entrant dans l'enceinte E se divise en deux flux d'air, F4 et F5. Le flux d'air F4 transite par des canaux 27 prévus dans le rotor 5 parallèlement à l'axe X-X', ce qui permet de refroidir efficacement le rotor 5. Le flux d'air F5 passe par l'entrefer e entre le rotor 5 et le stator 8 et lèche le stator.The internal air flow F 2 passes through openings 26 formed in part 21 of the pipe 17, these openings being distributed around the axis XX ′. The air flow F 2 entering the enclosure E is divided into two air flows, F 4 and F 5 . The air flow F 4 passes through channels 27 provided in the rotor 5 parallel to the axis XX ′, which effectively cools the rotor 5. The air flow F 5 passes through the air gap e between the rotor 5 and the stator 8 and licks the stator.

La circulation de l'air à l'intérieur de l'enceinte E est assistée par un second ventilateur 28 monté sur l'arbre 2 à l'intérieur de l'enceinte E et dont les pales 29 créent un mouvement de brassage de l'air à partir des ouvertures 26 et en direction de plusieurs orifices de sortie 30 ménagés dans la bride 12. On a représenté par les flèches F6 et F7 le flux d'air de refroidissement dans la partie aval et en sortie de l'enceinte E, qui résulte de la réunion des flux d'air F4 et F5.The air circulation inside the enclosure E is assisted by a second fan 28 mounted on the shaft 2 inside the enclosure E and whose blades 29 create a stirring movement of the air from the openings 26 and in the direction of several outlet orifices 30 formed in the flange 12. The arrows F 6 and F 7 show the flow of cooling air in the downstream part and at the outlet of the enclosure E, which results from the union of the air flows F 4 and F 5 .

Le flux d'air F3 est, quant à lui, dirigé vers des canaux 31 prévus dans le stator 8 radialement à l'extérieur de la partie 8a. Ces canaux 31 peuvent être régulièrement répartis autour de l'axe X-X' ou localisés dans certains secteurs, en particulier dans le cas où le stator présente un contour extérieur polygonal. Par exemple, dans le cas où le stator 8 a un contour extérieur octogonal alors que sa partie centrale est circulaire, les canaux 31 sont ménagés dans quatre zones externes de la section du stator. Le flux d'air F3 permet de refroidir le stator 8 et débouche en F8 par un orifice de sortie 32 prévu à l'extrémité aval chaque canal 31 dans la bride 12, à proximité des orifices 30.The air flow F 3 is, for its part, directed towards channels 31 provided in the stator 8 radially outside the part 8 a . These channels 31 can be regularly distributed around the axis XX 'or located in certain sectors, in particular in the case where the stator has a polygonal external contour. For example, in the case where the stator 8 has an octagonal external contour while its central part is circular, the channels 31 are formed in four external zones of the section of the stator. The air flow F 3 makes it possible to cool the stator 8 and opens out at F 8 through an outlet orifice 32 provided at the downstream end each channel 31 in the flange 12, near the orifices 30.

Une nervure 33 est prévue au voisinage de chaque orifice 32 pour dévier le flux F8 et éviter ainsi de créer une contre-pression au niveau de l'orifice 30 voisin.A rib 33 is provided in the vicinity of each orifice 32 to deflect the flow F 8 and thus avoid creating a back pressure at the level of the neighboring orifice 30.

Comme le second flux d'air F3 suit un trajet, défini par la tubulure 17 et les canaux 31, qui est radialement à l'extérieur de celui suivi par le premier flux F2, il est plus chargé en impuretés, qui sont relativement lourdes et sont centrifugées par le ventilateur 17, ce qui n'est pas particulièrement gênant car les canaux 31 sont séparés du volume interne du moteur défini par l'enceinte E et car leur section est suffisamment importante pour permettre son écoulement. En outre, les canaux 31 sont globalement rectilignes, de sorte que le flux F3 n'est pas gêné dans son écoulement, les impuretés ayant peu tendance à se déposer dans les canaux 31.As the second air flow F 3 follows a path, defined by the pipe 17 and the channels 31, which is radially outside that followed by the first air flow F 2 , it is more loaded with impurities, which are relatively heavy and are centrifuged by the fan 17, which is not particularly troublesome because the channels 31 are separated from the internal volume of the motor defined by the enclosure E and because their section is large enough to allow its flow. In addition, the channels 31 are generally rectilinear, so that the flow F 3 is not hampered in its flow, the impurities having little tendency to deposit in the channels 31.

Au contraire, le flux d'air F2 est relativement propre car les ouvertures 26 sont situées radialement à l'intérieur de la zone de rayon R, c'est-à-dire à l'intérieur du trajet du second flux d'air. En outre, les ouvertures 26 sont sensiblement perpendiculaires au flux d'air F3 dans la zone considérée de la tubulure 17, le flux F3 constituant le flux d'écoulement principal, de telle sorte que les impuretés suivent préférentiellement le trajet du flux F3.On the contrary, the air flow F 2 is relatively clean because the openings 26 are located radially inside the area of radius R, that is to say inside the path of the second air flow . In addition, the openings 26 are substantially perpendicular to the air flow F 3 in the zone under consideration of the pipe 17, the flow F 3 constituting the main flow flow, so that the impurities preferentially follow the path of the flow F 3 .

Ainsi, l'air circulant dans l'enceinte E est relativement propre et ne risque pas d'encrasser les parties tournantes du moteur 1 ou de s'accumuler dans l'entrefer e ou dans le bobinage 9, même si le trajet des flux d'air F4 à F6 dans l'enceinte E est relativement tortueux.Thus, the air circulating in the enclosure E is relatively clean and does not risk fouling the rotating parts of the motor 1 or accumulating in the air gap e or in the winding 9, even if the flow path d air F 4 to F 6 in enclosure E is relatively tortuous.

Dans le second mode de réalisation de l'invention représenté à la figure 2, les éléments analogues à ceux du premier mode de réalisation portent des références identiques. Ce mode de réalisation diffère du précédent en ce que les orifices de sortie 30 du flux d'air interne sont décalés angulairement des canaux 31. Ainsi, les orifices de sortie 32 par lesquels débouche l'écoulement externe, comme représenté par la flèche F8, sont disposés de telle sorte que les écoulement F7 et F8 n'interfèrent pas entre eux. Comme représenté à la figure 2, un orifice 32 peut être diamétralement opposé à un orifice 30.In the second embodiment of the invention shown in Figure 2, elements similar to those of the first embodiment bear identical references. This embodiment differs from the previous one in that the outlet orifices 30 of the internal air flow are angularly offset from the channels 31. Thus, the outlet orifices 32 through which the external flow opens, as shown by the arrow F 8 , are arranged so that the flows F 7 and F 8 do not interfere with each other. As shown in FIG. 2, an orifice 32 can be diametrically opposed to an orifice 30.

Quel que soit le mode de réalisation considéré, le refroidissement obtenu est de très bonne qualité car la totalité du flux F1 est utilisée pour le refroidissement du moteur 1. Le diamètre du ventilateur 1 peut donc être réduit par rapport aux dispositifs de l'état de la technique, ce qui permet de réduire en conséquence le bruit émis par ce ventilateur.Whatever the embodiment considered, the cooling obtained is of very good quality because the entire flow F 1 is used for cooling the motor 1. The diameter of the fan 1 can therefore be reduced compared to the devices in the state of the technique, which consequently reduces the noise emitted by this fan.

Compte tenu de la centrifugation des impuretés vers l'extérieur de l'enceinte E, la grille 22 peut avoir une maille relativement importante, ce qui diminue les pertes de charge induites et il n'est pas nécessaire de procéder à une maintenance régulière d'un élément de filtration tel que ceux équipant certains moteurs de l'état de la technique.Taking into account the centrifugation of the impurities towards outside the enclosure E, the grid 22 may have a relatively large mesh, which reduces losses of induced charge and there is no need to perform a regular maintenance of a filter element such as those equipping certain prior art engines.

L'invention est applicable indépendamment du type exact du moteur 1, qui peut être synchrone ou asynchrone, du type exact du ventilateur 24 qui peut être apte à tourner dans un seul sens ou dans les deux sens autour de l'axe X-X', du type de carcasse du moteur qui peut, notamment, être formée par un paquet de tôles et emmanché dans une virole massive avec, éventuellement, des ailettes externes.The invention is applicable regardless of the exact type of motor 1, which can be synchronous or asynchronous, of the type exact of fan 24 which can be able to rotate in a single direction or in both directions around the axis XX ', of the type carcass of the engine which may, in particular, be formed by a packet of sheets and fitted in a massive ferrule with, possibly external fins.

Selon une variante non représentée de l'invention, la bride 12 peut être réalisée en plusieurs pièces, notamment afin de faciliter la mise en place du stator 8.According to a variant not shown of the invention, the flange 12 can be made in several pieces, in particular to facilitate the installation of the stator 8.

Claims (10)

: Dispositif de ventilation d'un moteur électrique (1) de traction ferroviaire comprenant un ventilateur centrifuge (24) apte à tourner dans un ou deux sens, disposé dans une chambre d'entrée d'air (C) et refoulant de l'air en direction dudit moteur, caractérisé en ce que le flux d'air (F1) refoulé par ledit ventilateur est divisé en un flux interne (F2), dirigé vers l'intérieur d'une enceinte (E) de confinement renfermant au moins le rotor (5) dudit moteur, et un flux externe (F3), dirigé vers des canaux (31) de refroidissement du stator (8) dudit moteur.: Ventilation device for an electric motor (1) for rail traction comprising a centrifugal fan (24) capable of rotating in one or two directions, disposed in an air inlet chamber (C) and discharging air towards said motor, characterized in that the air flow (F 1 ) discharged by said fan is divided into an internal flow (F 2 ), directed towards the interior of a containment enclosure (E) containing at least the rotor (5) of said motor, and an external flow (F 3 ), directed towards cooling channels (31) of the stator (8) of said motor. Dispositif de ventilation selon la revendication 1, caractérisé en ce que ledit ventilateur (24) refoule dans une tubulure (17) d'alimentation desdits canaux (31), une cloison (21) de séparation du volume interne ladite tubulure et de ladite enceinte (E) étant percée d'au moins une ouverture (26) de communication permettant la circulation dudit premier flux (F2).Ventilation device according to claim 1, characterized in that said fan (24) discharges into a tube (17) supplying said channels (31), a partition (21) for separating the internal volume of said tube and of said enclosure ( E) being pierced with at least one communication opening (26) allowing the circulation of said first flow (F 2 ). Dispositif selon la revendication 2, caractérisé en ce qu'il comprend plusieurs ouvertures de communication (26) entre le volume interne (V) de ladite tubulure (17) et ladite enceinte (E), lesdites ouvertures étant sensiblement régulièrement réparties autour d'un axe central (X-X') dudit moteur (1) .Device according to claim 2, characterized in what it includes several communication openings (26) between the internal volume (V) of said tubing (17) and said enclosure (E), said openings being substantially regularly distributed around a central axis (X-X ') of said motor (1). Dispositif selon l'une des revendications 2 ou 3, caractérisé en ce que ladite ou lesdites ouvertures (26) sont formées radialement à l'intérieur du trajet défini par ladite tubulure (17) pour ledit second flux (F3).Device according to either of Claims 2 and 3, characterized in that the said opening (s) (26) are formed radially inside the path defined by the said tube (17) for the said second flow (F 3 ). Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend au moins une ouverture de sortie (30) dudit premier flux d'air (F2) de ladite enceinte (E).Device according to one of the preceding claims, characterized in that it comprises at least one outlet opening (30) of said first air flow (F 2 ) from said enclosure (E). Dispositif selon la revendication 5, caractérisé en ce que ladite ouverture de sortie (30) est ménagée à proximité du débouché (32) d'un canal de refroidissement (31) dudit stator (8). Device according to claim 5, characterized in that said outlet opening (30) is provided in the vicinity the outlet (32) of a cooling channel (31) of said stator (8). Dispositif selon la revendication 6, caractérisé en ce qu'il comprend une nervure (33) de séparation des flux d'air (F7, F8) sortant de ladite ouverture (30) et dudit canal (31).Device according to claim 6, characterized in that it comprises a rib (33) for separating the air flows (F 7 , F 8 ) leaving said opening (30) and said channel (31). Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un second ventilateur (28) prévu pour générer ou assister un écoulement d'air (F4, F5, F6) à l'intérieur de ladite enceinte (E), à partir dudit flux interne (F2).Device according to one of the preceding claims, characterized in that it comprises a second fan (28) designed to generate or assist an air flow (F 4 , F 5 , F 6 ) inside said enclosure ( E), from said internal flow (F 2 ). Dispositif selon l'une des revendications précédentes, caractérisé en ce que ladite enceinte de confinement (E) renferme ledit rotor (5), une partie radiale interne (8a) dudit stator (8), au moins un bobinage (9) associé audit stator ou audit rotor, une partie d'un arbre central (2) dudit moteur (1) et, éventuellement, un second ventilateur (28).Device according to one of the preceding claims, characterized in that said containment chamber (E) contains the said rotor (5), an internal radial part (8 a) of said stator (8), at least one winding (9) associated with said stator or to said rotor, part of a central shaft (2) of said motor (1) and, optionally, a second fan (28). Moteur électrique de traction ferroviaire (1) équipé d'un dispositif de ventilation (11-33, E, C) selon l'une des revendications précédentes.Railway traction electric motor (1) fitted a ventilation device (11-33, E, C) according to one of previous claims.
EP00401224A 1999-05-17 2000-05-04 Ventilation device for railway traction motor Withdrawn EP1054500A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9906213A FR2793874B1 (en) 1999-05-17 1999-05-17 AIR CONDENSER WITH AN INTEGRATED DEGASER AT THE RESERVE COVER
FR9906213 1999-05-17

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EP1054500A1 true EP1054500A1 (en) 2000-11-22

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Publication number Priority date Publication date Assignee Title
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FR2645818A1 (en) 1988-10-03 1990-10-19 American Standard Inc DIGITAL COMPRESSED AIR BRAKE CONTROL SYSTEM
EP0551554A1 (en) * 1992-01-17 1993-07-21 Mitsubishi Denki Kabushiki Kaisha Cooling system for electric car mounting transformer
US5387039A (en) * 1993-12-01 1995-02-07 General Electric Company AC traction motor with drive end bearing assembly for locomotive
US5789833A (en) * 1995-11-24 1998-08-04 Kabushiki Kaisha Toshiba Totally-enclosed traction motor for electric railcar

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FR2541441A1 (en) * 1983-02-22 1984-08-24 Delas Weir Sa DEVICE FOR DEGASSING CONDENSATES INSTALLED IN A WELL OF ELECTRICAL POWER UNIT CONDENSER
JPS60169084A (en) * 1984-02-14 1985-09-02 Hitachi Ltd Deaeration of condenser and device thereof
WO1990007633A1 (en) * 1989-01-06 1990-07-12 Birwelco Limited Steam condensing apparatus
US5145000A (en) * 1991-11-15 1992-09-08 Hudson Products Corporation Steam condensate storage tank with non-freezing feature
DE19506757A1 (en) * 1995-02-27 1996-08-29 Abb Management Ag Combined steam-turbine, gas-turbine power station

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241666A (en) * 1976-08-19 1980-12-30 Asea Aktiebolag Railway car electric traction motor air cooling system
FR2645818A1 (en) 1988-10-03 1990-10-19 American Standard Inc DIGITAL COMPRESSED AIR BRAKE CONTROL SYSTEM
EP0551554A1 (en) * 1992-01-17 1993-07-21 Mitsubishi Denki Kabushiki Kaisha Cooling system for electric car mounting transformer
US5387039A (en) * 1993-12-01 1995-02-07 General Electric Company AC traction motor with drive end bearing assembly for locomotive
US5789833A (en) * 1995-11-24 1998-08-04 Kabushiki Kaisha Toshiba Totally-enclosed traction motor for electric railcar

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FR2793874B1 (en) 2001-06-22

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