WO2024033584A1 - Nacelle system for an electric machine - Google Patents

Nacelle system for an electric machine Download PDF

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Publication number
WO2024033584A1
WO2024033584A1 PCT/FR2023/051193 FR2023051193W WO2024033584A1 WO 2024033584 A1 WO2024033584 A1 WO 2024033584A1 FR 2023051193 W FR2023051193 W FR 2023051193W WO 2024033584 A1 WO2024033584 A1 WO 2024033584A1
Authority
WO
WIPO (PCT)
Prior art keywords
fairing
electric machine
fins
adjustment device
cooling
Prior art date
Application number
PCT/FR2023/051193
Other languages
French (fr)
Inventor
Christophe Elie Simon Marie CASTELLI
Frédéric YZIQUEL
Franck PAYEN
Fabrice CORDEAU
Original Assignee
Safran Electrical & Power
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 Safran Electrical & Power filed Critical Safran Electrical & Power
Publication of WO2024033584A1 publication Critical patent/WO2024033584A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/223—Heat bridges

Definitions

  • TITLE Nacelle system for an electric machine
  • the present invention relates to a nacelle system for improving the cooling of cooling fins of an electrical machine.
  • the present invention relates to a system allowing the increase in the quantity of heat evacuated by the fins.
  • the present invention applies to any machine cooled by a fluid surrounding the electrical machine.
  • one application of the invention concerns the cooling of an aircraft electric motor.
  • an aircraft engine In operation, an aircraft engine is thermally stressed and therefore requires cooling in order to guarantee optimal operation.
  • An electric motor requires effective cooling all the more as the motor temperature strongly influences the motor's performance.
  • the engine In the case of cooling by air circulation, the engine is advantageously provided with thermally conductive fins increasing the heat exchange surface between the engine and the air in which the aircraft operates.
  • the aircraft may include a fairing near the engine, for example surrounding the engine.
  • the fairing is generally positioned to protect the engine from possible shocks but makes engine cooling ineffective.
  • the air flow arriving on the fins does not allow sufficient calories to be extracted from the fins and the cooling of the engine is not efficient. This situation can lead to oversizing of the engine and therefore to an excess mass of the aircraft.
  • the present invention therefore aims to overcome all or part of the aforementioned drawbacks and proposes to improve the cooling of the cooling fins of an electrical machine by allowing efficient cooling of the fins.
  • the present invention relates to a nacelle system for an electric machine provided with cooling fins, comprising a fairing configured to match the shape of the electric machine and an adjustment device configured to hold the fairing and place it around the fins cooling of the electric machine, the fairing comprising at least one fairing portion, the adjustment device comprising at least one connecting means disposed between two ends of the fairing portion.
  • the nacelle system allows, thanks to the adjustment device, to be positioned as close as possible to the fins and to optimize the fluid flows surrounding the electric machine in order to increase the quantity of heat exchanged between the fins and the fluids towards which calories are evacuated.
  • the fairing is positioned so as to participate in the transfer of heat between the fins and the air, the fairing makes it possible, for example, to direct a flow of air cooling the fins.
  • the fairing comprises holes distributed along a periphery of the fairing, the adjustment device comprising fixing means arranged in the holes so as to fix the fairing to the electric machine.
  • the connecting means comprises an assembly tie rod and at least two brackets, the two brackets being joined by the assembly tie rod.
  • the fairing comprises several fairing portions, the adjustment device comprising several connecting means each arranged between two ends of fairing portions.
  • the system includes an interface material in contact with the fairing and configured to be in contact with the cooling fins, the interface material being configured to protect the fins and/or allow a thermal interface between the fins and the fairing.
  • the fairing comprises a thermally conductive material.
  • the adjustment device includes locking means for locking the adjustment of the adjustment device.
  • the locking means includes a self-locking nut.
  • the present invention also relates to an electric machine comprising a body, thermally conductive fins distributed around the body, and a nacelle system as defined above.
  • the fairing comprises a material having a coefficient of thermal expansion corresponding to the coefficient of thermal expansion of the material of the body of the electric machine.
  • FIG 1 schematically illustrates an electric machine according to the invention
  • FIG 2 schematically illustrates an enlargement of an area of Figure 1 centered on the connecting means
  • FIG 3 schematically illustrates a nacelle system according to a first embodiment of the invention
  • FIG 4 schematically illustrates a nacelle system according to a second embodiment of the invention.
  • FIG. 1 schematically represents an electric machine 2.
  • the electric machine 2 comprises a body 4 of cylindrical shape, thermally conductive fins 6 distributed around of the body 4 and a nacelle system 8.
  • the nacelle system 8 comprises a fairing 10 configured to match the shape of the electric machine 2 and an adjustment device 12 configured to hold the fairing 10 and place it around the fins 6.
  • nacelle system 8 is meant the whole composed of the fairing 10 and the adjustment device 12.
  • the electric machine 2 comprises for example an aircraft engine provided with thermally conductive fins 6 configured to carry out a heat exchange between the fins 6 and the air in which the aircraft operates.
  • the nacelle system 8 is intended to improve the cooling of the cooling fins 6 of the electric machine 2.
  • the fairing 10 comprises a portion 14 of fairing 10, for example a thin metal sheet, for example 1 mm thick, formed for example from an aluminum alloy.
  • the portion 14 of fairing 10 is formed of another metallic, or polymer, or composite, or thermoplastic, or thermosetting material or of an aluminum alloy.
  • the portion 14 of fairing 10 is slightly flexible and held in shape by the adjustment device 12 to best match the fins 6 of the electric machine 2.
  • the shape is substantially cylindrical so that the fairing 10 takes the form of an annular ring of defined longitudinal dimension, for example of the same dimension as a dimension of the electric machine 2 along the longitudinal axis L, and of circular cross section , or elliptical, or substantially similar to the cross section of the electric machine 2.
  • the adjustment device 12 comprises at least one connecting means 16.
  • the connecting means 16 comprises for example a tie rod 18 connecting two ends 20 of the portion 14 of the fairing 10 so as to bring the two ends 20 together or to keep the two ends 20 at a constant distance from each other.
  • the adjustment device 12 comprises a bracket 22 arranged on one end 20.
  • the adjustment device 12 comprises a second bracket 22 disposed on the second end 20, the two brackets 22 being connected by the assembly tie rod 18.
  • the adjustment device 12 allows by example of bringing the two ends 20 of the portion 14 of fairing 10 into contact.
  • the brackets 22 also make it possible to reinforce the fairing 10.
  • the nacelle system 8 comprises a portion 14 of fairing 10 held by three assembly tie rods 18 maintaining the fairing 10 in the shape of a cylinder of constant circular section along the longitudinal axis of the fairing 10
  • the adjustment device 12 makes it possible to maintain the fairing 10 in a shape substantially similar to the cross section of the electric machine 2.
  • the assembly tie rods 18 are removable so as to be able to separate the two ends 20 and thus be able to remove the fairing 10 from the electric machine 2.
  • An assembly tie rod 18 is for example an adjustable mechanical part made with a screw system and/or lever closure and/or toggle closure.
  • an assembly tie rod 18 connects the brackets 22 allowing the distance between the brackets 22 to be adjusted.
  • each of the three tie rods 18 connects two brackets 22 so as to hold the two brackets 22 at a constant distance from each other.
  • the fairing 10 comprises holes 24 perforated in the material of the fairing 10 or made during the shaping of the fairing 10 for example during a stamping process and distributed along a periphery of the fairing 10, for example uniformly.
  • the adjustment device 12 comprises fixing means 26 configured to be arranged in the holes 24 and to fix the fairing 10 to the electric machine 2, preferably in contact with the fins 6 so as to optimize fluid flows for cooling the electric machine 2.
  • the fixing means 26 include for example screws and/or posts and/or washers.
  • the holes 24 are distributed non-uniformly on the fairing 10.
  • the fins 6 are in contact with the fairing 10 so that the fairing 10 also provides the function of heat diffuser.
  • the nacelle system 8 comprises an interface material 28 in contact with the fairing 10 on the one hand and with the fins 6 on the other hand so as to protect the fins 6 from contact with the fairing 10 , particularly in the case of fragile fins 6.
  • the interface material 28 comprises, for example, a foam or a soft material such as Teflon.
  • the interface material 28 comprises a thermally conductive material covering an internal surface of the fairing 10.
  • the interface material 28 transmits the heat evacuated by the fins 6 to the fairing 10. The interface material 28 participates thus cooling the fins 6 by forming a thermal interface between the fins 6 and the fairing 10.
  • the adjustment device 12 makes it possible to place the fairing 10 on the fins 6 so that the force exerted by the fairing 10 on the fins 6 is distributed substantially uniformly on the fins 6.
  • the fairing 10 is for example fixed to the electric machine 2 by removable fixing means 26 so as to be able to dissociate the fairing 10 from the electric machine 2.
  • the fixing means 26 maintain the fairing 10 in a substantially cylindrical shape around the fins 6.
  • the fairing 10 makes it possible to channel the air along a surface of the fins 6 so as to increase the quantity of heat exchanged between the fins 6 and the air.
  • an air flow is directed towards the fins 6 and the cooling of the electric machine 2 is improved in particular thanks to a reduction in pressure losses and/or a reduction in air leaks out of the fins 6.
  • the air flow is concentrated exclusively in the fins 6.
  • the heat exchange surface of the fins 6 when the electric machine 2 is housed in the fairing 10 is greater than the heat exchange surface of the fins 6 when the electric machine 2 is not housed in the fairing 10.
  • openings are made in the material of the fairing 10 so as to increase the flow of air cooling the fins 6 via an import of secondary air.
  • Air channeling improves the performance of the electric machine 2.
  • the channeling makes it possible to increase the capacity of the engine to provide power to propel the aircraft.
  • the adjustment device 12 allows the fairing 10 to perfectly match the shape of the electric machine 2 provided with fins 6 so that all the available air cools the fins 6.
  • the fairing 10 comprises a thermally conductive material so as to dissipate the heat emitted by the fins 6 and transmitted to the fairing 10.
  • the fairing 10 comprises in this case a material having a thermal expansion coefficient corresponding to the thermal expansion coefficient of a material of the electric machine 2, corresponding in the case of the aircraft engine to the coefficient of thermal expansion of a material of the body 4 of the aircraft engine.
  • the coefficient of thermal expansion of the material of the fairing 10 is equal to the coefficient of thermal expansion of the material of the electric machine 2.
  • the material of the fairing 10 is the same as that forming the electric machine 2 so that the thermal expansions of the electric machine 2 and of the fairing 10 are of the same nature.
  • the adjustment device 12 comprises a tie rod 18 connecting two ends 20 of the fairing 10 and a locking means 30 so as to lock the adjustment of the tie rod 18.
  • the locking means 30 is configured to lock the adjustment of the adjustment device 12.
  • the locking means 30 makes it possible, for example, to avoid relative movements between the fairing 10 and the adjustment device 12 during vibrations of the fairing 10 and/or the electric machine 2.
  • the locking means 30 comprises for example a nut provided with a device preventing loosening of the nut without preventing dismantling of the nut.
  • the locking means 30 comprises for example a castle nut and/or a nut with an incorporated ring and/or a braked nut and/or a self-locking nut.
  • the adjustment device 12 comprises a first bracket 22 arranged on one end 20, the end 20 comprising a dropped edge 32.
  • the dropped edge 32 makes it possible, for example, to reinforce the end 20, to protect a user when installing the nacelle system 8 and facilitate the alignment of the two ends 20 of the fairing 10.
  • the fallen edge 32 allows a watertight junction of the two ends 20 of the fairing 10.
  • the bracket 22 includes an access opening 34 facing the tie rod 18 so as to facilitate access to the tie rod 18 and therefore to facilitate its installation.
  • the adjustment device 12 comprises a fixing device 36 provided with a bracket 22, the fixing device 36 being arranged on the second end 20.
  • the fixing device 36 makes it possible to reinforce the hold of the tie rod 18 on the second end 20 .
  • the fairing 10 of the nacelle system 8 comprises two portions 14 of fairing 10 of identical dimensions.
  • the portions 14 of fairing 10 may be in different numbers and of different dimensions from each other.
  • the portions 14 of fairing 10 include different materials, for example a thermoplastic material, a thermosetting material, a composite material or an aluminum alloy.
  • the portions 14 of fairing 10 are interconnected by several connecting means 16.
  • the nacelle system 8 shown comprises two identical connecting means 16.
  • the nacelle system 8 comprises a different number of connecting means 16, the connecting means 16 being identical or different.
  • each connecting means 16 is arranged between two portions 14 of fairing 10 so that the portions 14 of fairing 10 form the fairing 10. More precisely, each connecting means 16 is arranged between two ends 20 of portion 14 10 different fairings.
  • the connecting means 16 include for example assembly tie rods 18, and/or screws, and/or nuts and/or rivets.
  • the connecting means 16 are removable so as to be able to separate the portions 14 of the fairing 10.
  • each connecting means 16 comprises three assembly tie rods 18 of the fairing 10. Each tie rod 18 is arranged between two brackets 22.
  • the number of portions 14 of fairing 10 allows for example to adjust the fairing as best as possible to the shape of the electric machine 2 against which the fairing 10 is intended to be pressed.
  • the number of connection means 16 and their nature guarantee for example that the fairing 10 is well pressed against the fins 6 of the electric machine 2 and/or that the adjustment of the fairing 10 around the electric machine 2 will not be modified during of the use of the electric machine 2.
  • the connecting means 16 is simply a hinge, or any other method of attaching the portions 14 of fairing 10 to each other. At least one connecting means 16 remains adjustable as described above.
  • the adjustment device 12 makes it possible to maintain the fairing 10 in a shape corresponding to an electric machine 2 of non-cylindrical shape so that the fairing 10 is arranged around the fins 6 of the electric machine 2, in particular by means of several portions 14 of fairing 10 and connecting means 16.
  • a fairing as described above adapts for example to an electric motor and/or to a heat engine and/or to a generator and/or to a fan and/or to an exchanger.
  • the electric machine 2 comprises for example an intelligent motor comprising an electric motor and its electronic control member advantageously used in the aeronautics field.
  • an aircraft engine comprising a nacelle system 8 as defined above forms a light and compact aircraft engine module ready to be installed in an aircraft.
  • the structure of the engine module ensures efficient engine cooling, regardless of the aircraft in which the engine module is installed.
  • the installation of the engine module in an aircraft is facilitated in particular thanks to the modular nature of the engine module, the efficient and autonomous cooling of the engine module, and the removable nature of the nacelle system 8.

Abstract

The invention relates to a nacelle system (8) for an electric machine (2) provided with cooling fins (6), which comprises a fairing (10) configured to match the shape of the electric machine (2) and an adjustment device (12) configured to hold the fairing (10) and press it against the cooling fins (6) for cooling the electric machine (2), the fairing (4) comprising at least one portion (14) of fairing (10), the adjustment device (12) comprising at least one connection means (16) arranged between two ends (20) of portion (14) of fairing (10). In particular, the nacelle system (8) enables the electric machine (2) to be cooled more effectively by improved air circulation and improves the performance of the electric machine (2).

Description

DESCRIPTION DESCRIPTION
TITRE : Système de nacelle pour une machine électrique TITLE: Nacelle system for an electric machine
Domaine technique Technical area
La présente invention concerne un système de nacelle pour l’ amélioration du refroidissement d’ ailettes de refroidissement d’une machine électrique. The present invention relates to a nacelle system for improving the cooling of cooling fins of an electrical machine.
En particulier, la présente invention concerne un système permettant l’ augmentation de la quantité de chaleur évacuée par les ailettes. In particular, the present invention relates to a system allowing the increase in the quantity of heat evacuated by the fins.
De manière générale, la présente invention s ’ applique à toute machine refroidie par un fluide entourant la machine électrique. Toutefois, une application de l’invention concerne le refroidissement d’un moteur électrique d’aéronef. In general, the present invention applies to any machine cooled by a fluid surrounding the electrical machine. However, one application of the invention concerns the cooling of an aircraft electric motor.
Techniques antérieures Previous techniques
En fonctionnement, un moteur d’un aéronef est sollicité thermiquement et nécessite donc un refroidissement afin de garantir un fonctionnement optimal. Un moteur électrique nécessite d’autant plus un refroidissement efficace que la température du moteur influence fortement les performances du moteur. Dans le cas d’un refroidissement par circulation d’ air, le moteur est avantageusement muni d’ ailettes thermiquement conductrices augmentant la surface d’ échange de chaleur entre le moteur et l’ air dans lequel évolue l’ aéronef. In operation, an aircraft engine is thermally stressed and therefore requires cooling in order to guarantee optimal operation. An electric motor requires effective cooling all the more as the motor temperature strongly influences the motor's performance. In the case of cooling by air circulation, the engine is advantageously provided with thermally conductive fins increasing the heat exchange surface between the engine and the air in which the aircraft operates.
L ’ aéronef peut comprendre un carénage à proximité du moteur, par exemple entourant le moteur. Le carénage est généralement positionné de manière à protéger le moteur d’ éventuels chocs mais rend inefficace le refroidissement du moteur. En outre, le flux d’ air arrivant sur les ailettes ne permet pas d’ extraire suffisamment de calories des ailettes et le refroidissement du moteur n’ est pas performant. Cette situation peut conduire à un surdimensionnement du moteur et donc à un surplus de masse de l’ aéronef. The aircraft may include a fairing near the engine, for example surrounding the engine. The fairing is generally positioned to protect the engine from possible shocks but makes engine cooling ineffective. In addition, the air flow arriving on the fins does not allow sufficient calories to be extracted from the fins and the cooling of the engine is not efficient. This situation can lead to oversizing of the engine and therefore to an excess mass of the aircraft.
Exposé de l’invention La présente invention a donc pour objectif de pallier tout ou partie des inconvénients précités et propose d’ améliorer le refroidissement d’ ailettes de refroidissement d’une machine électrique en permettant un refroidissement performant des ailettes. Presentation of the invention The present invention therefore aims to overcome all or part of the aforementioned drawbacks and proposes to improve the cooling of the cooling fins of an electrical machine by allowing efficient cooling of the fins.
La présente invention a pour objet un système de nacelle pour une machine électrique munie d’ ailettes de refroidissement, comprenant un carénage configuré pour épouser la forme de la machine électrique et un dispositif d’ ajustement configuré pour maintenir le carénage et le plaquer autour des ailettes de refroidissement de la machine électrique, le carénage comprenant au moins une portion de carénage, le dispositif d’ ajustement comprenant au moins un moyen de liaison disposé entre deux extrémités de portion de carénage. The present invention relates to a nacelle system for an electric machine provided with cooling fins, comprising a fairing configured to match the shape of the electric machine and an adjustment device configured to hold the fairing and place it around the fins cooling of the electric machine, the fairing comprising at least one fairing portion, the adjustment device comprising at least one connecting means disposed between two ends of the fairing portion.
Le système de nacelle permet, grâce au dispositif d’ ajustement, d’ être positionné au plus près des ailettes et d’optimiser les flux de fluide entourant la machine électrique afin d’ augmenter la quantité de chaleur échangée entre les ailettes et les fluides vers lesquels les calories sont évacuées. En particulier, le carénage est positionné de manière à participer au transfert de chaleur entre les ailettes et l’ air, le carénage permet par exemple de diriger un flux d’ air refroidissant les ailettes. The nacelle system allows, thanks to the adjustment device, to be positioned as close as possible to the fins and to optimize the fluid flows surrounding the electric machine in order to increase the quantity of heat exchanged between the fins and the fluids towards which calories are evacuated. In particular, the fairing is positioned so as to participate in the transfer of heat between the fins and the air, the fairing makes it possible, for example, to direct a flow of air cooling the fins.
Avantageusement, le carénage comprend des trous répartis le long d’une périphérie du carénage, le dispositif d’ ajustement comprenant des moyens de fixation disposés dans les trous de manière à fixer le carénage à la machine électrique. Advantageously, the fairing comprises holes distributed along a periphery of the fairing, the adjustment device comprising fixing means arranged in the holes so as to fix the fairing to the electric machine.
De préférence, le moyen de liaison comprend un tirant d’ assemblage et au moins deux équerres, les deux équerres étant jointes par le tirant d’ assemblage. Preferably, the connecting means comprises an assembly tie rod and at least two brackets, the two brackets being joined by the assembly tie rod.
Dans un mode de réalisation, le carénage comprend plusieurs portions de carénage, le dispositif d’ ajustement comprenant plusieurs moyens de liaison disposés chacun entre deux extrémités de portions de carénage. In one embodiment, the fairing comprises several fairing portions, the adjustment device comprising several connecting means each arranged between two ends of fairing portions.
Optionnellement, le système comprend un matériau d’interface en contact avec le carénage et configuré pour être au contact des ailettes de refroidissement, le matériau d’interface étant configuré pour protéger les ailettes et/ou permettre une interface thermique entre les ailettes et le carénage. Optionally, the system includes an interface material in contact with the fairing and configured to be in contact with the cooling fins, the interface material being configured to protect the fins and/or allow a thermal interface between the fins and the fairing.
Avantageusement, le carénage comprend un matériau thermiquement conducteur. Advantageously, the fairing comprises a thermally conductive material.
De préférence, le dispositif d’ ajustement comprend un moyen de verrouillage pour verrouiller l ’ajustement du dispositif d’ ajustement. Preferably, the adjustment device includes locking means for locking the adjustment of the adjustment device.
Optionnellement, le moyen de verrouillage comprend un écrou auto freinant. Optionally, the locking means includes a self-locking nut.
La présente invention a également pour objet une machine électrique comprenant un corps, des ailettes thermiquement conductrices réparties autour du corps, et un système de nacelle tel que défini précédemment. The present invention also relates to an electric machine comprising a body, thermally conductive fins distributed around the body, and a nacelle system as defined above.
Avantageusement, le carénage comprend un matériau ayant un coefficient de dilatation thermique correspondant au coefficient de dilatation thermique du matériau du corps de la machine électrique. Advantageously, the fairing comprises a material having a coefficient of thermal expansion corresponding to the coefficient of thermal expansion of the material of the body of the electric machine.
Brève description des dessins Brief description of the drawings
D ’ autres objectifs, caractéristiques et avantages de l’invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d’ exemple non limitatif, et faite en référence aux dessins annexés sur lesquels : Other objectives, characteristics and advantages of the invention will appear on reading the following description, given solely by way of non-limiting example, and made with reference to the appended drawings in which:
[Fig 1 ] illustre schématiquement une machine électrique selon l’invention ; [Fig 1] schematically illustrates an electric machine according to the invention;
[Fig 2] illustre schématiquement un agrandissement d’une zone de la figure 1 centrée sur le moyen de liaison ; [Fig 2] schematically illustrates an enlargement of an area of Figure 1 centered on the connecting means;
[Fig 3] illustre schématiquement un système de nacelle selon un premier mode de réalisation de l ’invention ; et [Fig 3] schematically illustrates a nacelle system according to a first embodiment of the invention; And
[Fig 4] illustre schématiquement un système de nacelle selon un deuxième mode de réalisation de l’invention. [Fig 4] schematically illustrates a nacelle system according to a second embodiment of the invention.
Exposé détaillé d’au moins un mode de réalisation Detailed presentation of at least one embodiment
La figure 1 représente schématiquement une machine 2 électrique. La machine 2 électrique comprend un corps 4 de forme cylindrique, des ailettes 6 thermiquement conductrices réparties autour du corps 4 et un système 8 de nacelle. Le système 8 de nacelle comprend un carénage 10 configuré pour épouser la forme de la machine 2 électrique et un dispositif d’ ajustement 12 configuré pour maintenir le carénage 10 et le plaquer autour des ailettes 6. On entend par système 8 de nacelle l’ ensemble composé par le carénage 10 et le dispositif d’ ajustement 12. Figure 1 schematically represents an electric machine 2. The electric machine 2 comprises a body 4 of cylindrical shape, thermally conductive fins 6 distributed around of the body 4 and a nacelle system 8. The nacelle system 8 comprises a fairing 10 configured to match the shape of the electric machine 2 and an adjustment device 12 configured to hold the fairing 10 and place it around the fins 6. By nacelle system 8 is meant the whole composed of the fairing 10 and the adjustment device 12.
La machine 2 électrique comprend par exemple un moteur d’ aéronef muni d’ ailettes 6 thermiquement conductrices configurées pour effectuer un échange de chaleur entre les ailettes 6 et l’ air dans lequel évolue l’aéronef. The electric machine 2 comprises for example an aircraft engine provided with thermally conductive fins 6 configured to carry out a heat exchange between the fins 6 and the air in which the aircraft operates.
Le système 8 de nacelle est destiné à améliorer le refroidissement des ailettes 6 de refroidissement de la machine 2 électrique. The nacelle system 8 is intended to improve the cooling of the cooling fins 6 of the electric machine 2.
Le carénage 10 comprend une portion 14 de carénage 10, par exemple une tôle métallique de faible épaisseur, par exemple de 1 mm d’ épaisseur, formée par exemple d’un alliage d’ aluminium. Dans un autre mode de réalisation, la portion 14 de carénage 10 est formée d’un autre matériau métallique, ou polymère, ou composite, ou thermoplastique, ou thermodurcissable ou d’un alliage d’aluminium. La portion 14 de carénage 10 est légèrement flexible et maintenue en forme par le dispositif d’ ajustement 12 pour épouser au mieux les ailettes 6 de la machine 2 électrique. The fairing 10 comprises a portion 14 of fairing 10, for example a thin metal sheet, for example 1 mm thick, formed for example from an aluminum alloy. In another embodiment, the portion 14 of fairing 10 is formed of another metallic, or polymer, or composite, or thermoplastic, or thermosetting material or of an aluminum alloy. The portion 14 of fairing 10 is slightly flexible and held in shape by the adjustment device 12 to best match the fins 6 of the electric machine 2.
Ici la forme est sensiblement cylindrique pour que le carénage 10 prenne la forme d’une bague annulaire de dimension longitudinale définie, par exemple de même dimension qu’une dimension de la machine 2 électrique selon l’ axe longitudinal L, et de section transversale circulaire, ou elliptique, ou sensiblement similaire à la section transversale de la machine 2 électrique. Here the shape is substantially cylindrical so that the fairing 10 takes the form of an annular ring of defined longitudinal dimension, for example of the same dimension as a dimension of the electric machine 2 along the longitudinal axis L, and of circular cross section , or elliptical, or substantially similar to the cross section of the electric machine 2.
Le dispositif d’ajustement 12 comprend au moins un moyen de liaison 16. Le moyen de liaison 16 comprend par exemple un tirant d’ assemblage 18 reliant deux extrémités 20 de la portion 14 de carénage 10 de manière à rapprocher les deux extrémités 20 ou à maintenir les deux extrémités 20 à une distance constante l ’une de l’ autre. Avantageusement, Le dispositif d’ ajustement 12 comprend une équerre 22 disposée sur une extrémité 20. De préférence, le dispositif d’ ajustement 12 comprend une deuxième équerre 22 disposée sur la deuxième extrémité 20, les deux équerres 22 étant reliées par le tirant d’ assemblage 18. Le dispositif d’ ajustement 12 permet par exemple de mettre en contact les deux extrémités 20 de la portion 14 de carénage 10. Les équerres 22 permettent également de renforcer le carénage 10. The adjustment device 12 comprises at least one connecting means 16. The connecting means 16 comprises for example a tie rod 18 connecting two ends 20 of the portion 14 of the fairing 10 so as to bring the two ends 20 together or to keep the two ends 20 at a constant distance from each other. Advantageously, the adjustment device 12 comprises a bracket 22 arranged on one end 20. Preferably, the adjustment device 12 comprises a second bracket 22 disposed on the second end 20, the two brackets 22 being connected by the assembly tie rod 18. The adjustment device 12 allows by example of bringing the two ends 20 of the portion 14 of fairing 10 into contact. The brackets 22 also make it possible to reinforce the fairing 10.
Dans l ’exemple de la figure 1 , le système 8 de nacelle comprend une portion 14 de carénage 10 maintenue par trois tirants d’ assemblage 18 maintenant le carénage 10 dans une forme de cylindre de section circulaire constante selon l’ axe longitudinal du carénage 10. En outre, le dispositif d’ ajustement 12 permet de maintenir le carénage 10 dans une forme sensiblement similaire à la section transversale de la machine 2 électrique. Avantageusement, les tirants d’assemblage 18 sont amovibles de manière à pouvoir séparer les deux extrémités 20 et ainsi pouvoir retirer le carénage 10 de la machine 2 électrique. In the example of Figure 1, the nacelle system 8 comprises a portion 14 of fairing 10 held by three assembly tie rods 18 maintaining the fairing 10 in the shape of a cylinder of constant circular section along the longitudinal axis of the fairing 10 In addition, the adjustment device 12 makes it possible to maintain the fairing 10 in a shape substantially similar to the cross section of the electric machine 2. Advantageously, the assembly tie rods 18 are removable so as to be able to separate the two ends 20 and thus be able to remove the fairing 10 from the electric machine 2.
Un tirant d’ assemblage 18 est par exemple une pièce mécanique réglable réalisée avec un système de vis et/ou fermeture à levier et/ou fermeture à bascule. En particulier, un tirant d’assemblage 18 relie les équerres 22 en permettant de régler l ’écart entre les équerres 22. Dans l’ exemple de la figure 1 , chacun des trois tirants 18 relie deux équerres 22 de manière à maintenir les deux équerres 22 à une distance constante l’une de l’ autre. An assembly tie rod 18 is for example an adjustable mechanical part made with a screw system and/or lever closure and/or toggle closure. In particular, an assembly tie rod 18 connects the brackets 22 allowing the distance between the brackets 22 to be adjusted. In the example of Figure 1, each of the three tie rods 18 connects two brackets 22 so as to hold the two brackets 22 at a constant distance from each other.
De préférence, le carénage 10 comprend des trous 24 perforés dans la matière du carénage 10 ou réalisés lors de la mise en forme du carénage 10 par exemple lors d’un procédé d’ estampillage et répartis le long d’une périphérie du carénage 10, par exemple de manière uniforme. Avantageusement, le dispositif d’ajustement 12 comprend des moyens de fixation 26 configurés pour être disposés dans les trous 24 et pour fixer le carénage 10 à la machine 2 électrique, de préférence au contact des ailettes 6 de manière à optimiser des flux de fluide pour le refroidissement de la machine 2 électrique. Les moyens de fixations 26 comprennent par exemple des vis et/ou des colonnettes et/ou des rondelles. Dans un mode de réalisation, les trous 24 sont répartis de manière non uniforme sur le carénage 10. De préférence, les ailettes 6 sont en contact avec le carénage 10 de sorte que le carénage 10 assure également la fonction de diffuseur de chaleur. Preferably, the fairing 10 comprises holes 24 perforated in the material of the fairing 10 or made during the shaping of the fairing 10 for example during a stamping process and distributed along a periphery of the fairing 10, for example uniformly. Advantageously, the adjustment device 12 comprises fixing means 26 configured to be arranged in the holes 24 and to fix the fairing 10 to the electric machine 2, preferably in contact with the fins 6 so as to optimize fluid flows for cooling the electric machine 2. The fixing means 26 include for example screws and/or posts and/or washers. In one embodiment, the holes 24 are distributed non-uniformly on the fairing 10. Preferably, the fins 6 are in contact with the fairing 10 so that the fairing 10 also provides the function of heat diffuser.
Dans un mode de réalisation, le système 8 de nacelle comprend un matériau d’interface 28 en contact avec le carénage 10 d’une part et avec les ailettes 6 d’ autre part de manière à protéger les ailettes 6 du contact avec le carénage 10, notamment dans le cas d’ ailettes 6 fragiles. In one embodiment, the nacelle system 8 comprises an interface material 28 in contact with the fairing 10 on the one hand and with the fins 6 on the other hand so as to protect the fins 6 from contact with the fairing 10 , particularly in the case of fragile fins 6.
Le matériau d’interface 28 comprend par exemple une mousse ou un matériau doux tel que le téflon. De préférence, le matériau d’interface 28 comprend un matériau thermiquement conducteur recouvrant une surface interne du carénage 10. En outre, le matériau d’interface 28 transmet la chaleur évacuée par les ailettes 6 au carénage 10. Le matériau d’interface 28 participe ainsi au refroidissement des ailettes 6 en formant une interface thermique entre les ailettes 6 et le carénage 10. The interface material 28 comprises, for example, a foam or a soft material such as Teflon. Preferably, the interface material 28 comprises a thermally conductive material covering an internal surface of the fairing 10. In addition, the interface material 28 transmits the heat evacuated by the fins 6 to the fairing 10. The interface material 28 participates thus cooling the fins 6 by forming a thermal interface between the fins 6 and the fairing 10.
Avantageusement, le dispositif d’ajustement 12 permet de mettre en appui le carénage 10 sur les ailettes 6 de sorte que la force exercée par le carénage 10 sur les ailettes 6 est répartie de manière sensiblement uniforme sur les ailettes 6. Advantageously, the adjustment device 12 makes it possible to place the fairing 10 on the fins 6 so that the force exerted by the fairing 10 on the fins 6 is distributed substantially uniformly on the fins 6.
Le carénage 10 est par exemple fixé à la machine 2 électrique par des moyens de fixation 26 amovibles de manière à pouvoir dissocier le carénage 10 de la machine 2 électrique. En outre, les moyens de fixation 26 maintiennent le carénage 10 dans une forme sensiblement cylindrique autour des ailettes 6. The fairing 10 is for example fixed to the electric machine 2 by removable fixing means 26 so as to be able to dissociate the fairing 10 from the electric machine 2. In addition, the fixing means 26 maintain the fairing 10 in a substantially cylindrical shape around the fins 6.
Lorsque la machine 2 électrique est logée dans le carénage 10, le carénage 10 permet de canaliser l’ air le long d’une surface des ailettes 6 de manière à augmenter la quantité de chaleur échangée entre les ailettes 6 et l’ air. En outre, un flux d’ air est dirigé vers les ailettes 6 et le refroidissement de la machine 2 électrique est amélioré notamment grâce à une réduction des pertes de charges et/ou une diminution des fuites d’ air hors des ailettes 6. Avantageusement, le flux d’ air est concentré exclusivement dans les ailettes 6. En outre, la surface d’ échange thermique des ailettes 6 lorsque la machine 2 électrique est logée dans le carénage 10 est supérieure à la surface d’échange thermique des ailettes 6 lorsque la machine 2 électrique n’ est pas logée dans le carénage 10. When the electric machine 2 is housed in the fairing 10, the fairing 10 makes it possible to channel the air along a surface of the fins 6 so as to increase the quantity of heat exchanged between the fins 6 and the air. In addition, an air flow is directed towards the fins 6 and the cooling of the electric machine 2 is improved in particular thanks to a reduction in pressure losses and/or a reduction in air leaks out of the fins 6. Advantageously, the air flow is concentrated exclusively in the fins 6. In addition, the heat exchange surface of the fins 6 when the electric machine 2 is housed in the fairing 10 is greater than the heat exchange surface of the fins 6 when the electric machine 2 is not housed in the fairing 10.
Optionnellement, des ouvertures (non représentées) sont réalisées dans la matière du carénage 10 de manière à augmenter le flux d’ air refroidissant les ailettes 6 via un import d’ air secondaire. Optionally, openings (not shown) are made in the material of the fairing 10 so as to increase the flow of air cooling the fins 6 via an import of secondary air.
La canalisation de l’ air permet d’ améliorer les performances de la machine 2 électrique. Par exemple dans le cas du moteur d’ aéronef, en particulier électrique, la canalisation permet d’ augmenter la capacité du moteur à fournir de la puissance pour propulser l’ aéronef. Air channeling improves the performance of the electric machine 2. For example in the case of the aircraft engine, in particular electric, the channeling makes it possible to increase the capacity of the engine to provide power to propel the aircraft.
De préférence, le dispositif d’ ajustement 12 permet au carénage 10 d’ épouser parfaitement la forme de la machine 2 électrique munie d’ ailettes 6 de sorte que tout l’air disponible refroidisse les ailettes 6. Preferably, the adjustment device 12 allows the fairing 10 to perfectly match the shape of the electric machine 2 provided with fins 6 so that all the available air cools the fins 6.
Avantageusement, le carénage 10 comprend un matériau thermiquement conducteur de manière à dissiper la chaleur émise par les ailettes 6 et transmise au carénage 10. Le carénage 10 comprend dans ce cas un matériau ayant un coefficient de dilatation thermique correspondant au coefficient de dilation thermique d’un matériau de la machine 2 électrique, correspondant dans le cas du moteur d’aéronef au coefficient de dilatation thermique d’un matériau du corps 4 du moteur d’ aéronef. Advantageously, the fairing 10 comprises a thermally conductive material so as to dissipate the heat emitted by the fins 6 and transmitted to the fairing 10. The fairing 10 comprises in this case a material having a thermal expansion coefficient corresponding to the thermal expansion coefficient of a material of the electric machine 2, corresponding in the case of the aircraft engine to the coefficient of thermal expansion of a material of the body 4 of the aircraft engine.
En outre, le coefficient de dilatation thermique du matériau du carénage 10 est égal au coefficient de dilation thermique du matériau de la machine 2 électrique. De préférence, le matériau du carénage 10 est le même que celui formant la machine 2 électrique de sorte que les dilatations thermiques de la machine 2 électrique et du carénage 10 sont de même nature. In addition, the coefficient of thermal expansion of the material of the fairing 10 is equal to the coefficient of thermal expansion of the material of the electric machine 2. Preferably, the material of the fairing 10 is the same as that forming the electric machine 2 so that the thermal expansions of the electric machine 2 and of the fairing 10 are of the same nature.
On a représenté schématiquement sur la figure 2 un agrandissement d’une zone de la figure 1 représentant notamment une vue détaillée d’une partie du dispositif d’ ajustement 12. Le dispositif d’ ajustement 12 comprend un tirant 18 reliant deux extrémités 20 du carénage 10 et un moyen de verrouillage 30 de manière à verrouiller l’ ajustement du tirant 18. Le moyen de verrouillage 30 est configuré pour verrouiller l’ ajustement du dispositif d’ ajustement 12. Le moyen de verrouillage 30 permet par exemple d’ éviter les mouvements relatifs entre le carénage 10 et le dispositif d’ajustement 12 lors de vibrations du carénage 10 et/ou de la machine 2 électrique. We have shown schematically in Figure 2 an enlargement of an area of Figure 1 representing in particular a detailed view of a part of the adjustment device 12. The adjustment device 12 comprises a tie rod 18 connecting two ends 20 of the fairing 10 and a locking means 30 so as to lock the adjustment of the tie rod 18. The locking means 30 is configured to lock the adjustment of the adjustment device 12. The locking means 30 makes it possible, for example, to avoid relative movements between the fairing 10 and the adjustment device 12 during vibrations of the fairing 10 and/or the electric machine 2.
Le moyen de verrouillage 30 comprend par exemple un écrou muni d’un dispositif empêchant le desserrage de l’ écrou sans empêcher le démontage de l’ écrou. Le moyen de verrouillage 30 comprend par exemple un écrou à créneaux et/ou un écrou à bague incorporé et/ou un écrou freiné et/ou un écrou auto freinant. The locking means 30 comprises for example a nut provided with a device preventing loosening of the nut without preventing dismantling of the nut. The locking means 30 comprises for example a castle nut and/or a nut with an incorporated ring and/or a braked nut and/or a self-locking nut.
Le dispositif d’ ajustement 12 comprend une première équerre 22 disposée sur une extrémité 20, l’extrémité 20 comprenant un bord tombé 32. Le bord tombé 32 permet par exemple de renforcer l ’extrémité 20, de protéger un utilisateur lors de la pose du système 8 de nacelle et de faciliter l’ alignement des deux extrémités 20 du carénage 10. Le bord tombé 32 permet une jonction étanche des deux extrémités 20 du carénage 10. The adjustment device 12 comprises a first bracket 22 arranged on one end 20, the end 20 comprising a dropped edge 32. The dropped edge 32 makes it possible, for example, to reinforce the end 20, to protect a user when installing the nacelle system 8 and facilitate the alignment of the two ends 20 of the fairing 10. The fallen edge 32 allows a watertight junction of the two ends 20 of the fairing 10.
Avantageusement l ’équerre 22 comprend une ouverture d’ accès 34 en regard du tirant 18 de manière à faciliter l’ accès au tirant 18 et donc à faciliter son installation. Advantageously, the bracket 22 includes an access opening 34 facing the tie rod 18 so as to facilitate access to the tie rod 18 and therefore to facilitate its installation.
Le dispositif d’ajustement 12 comprend un dispositif de fixation 36 muni d’une équerre 22, le dispositif de fixation 36 étant disposé sur la deuxième extrémité 20. Le dispositif de fixation 36 permet de renforcer la tenue du tirant 18 sur la deuxième extrémité 20. The adjustment device 12 comprises a fixing device 36 provided with a bracket 22, the fixing device 36 being arranged on the second end 20. The fixing device 36 makes it possible to reinforce the hold of the tie rod 18 on the second end 20 .
On a représenté schématiquement sur la figure 3 , le système 8 de nacelle de la figure 1 déposé de la machine 2 électrique. La dépose du carénage 10 de la machine 2 électrique est par exemple facilitée par l’utilisation d’un tirant d’ assemblage 18 tel que décrit précédemment. We have shown schematically in Figure 3, the nacelle system 8 of Figure 1 removed from the electric machine 2. The removal of the fairing 10 of the electric machine 2 is for example facilitated by the use of an assembly tie rod 18 as described previously.
Dans un autre mode de réalisation représenté schématiquement sur la figure 4, le carénage 10 du système 8 de nacelle comprend deux portions 14 de carénage 10 de dimensions identiques. Dans un autre mode de réalisation, les portions 14 de carénage 10 peuvent être en nombre différent et de dimensions différentes les unes des autres. Optionnellement, les portions 14 de carénage 10 comprennent différents matériaux, par exemple un matériau thermoplastique, un matériau thermodurcissable, un matériau composite ou un alliage d’ aluminium. In another embodiment shown schematically in Figure 4, the fairing 10 of the nacelle system 8 comprises two portions 14 of fairing 10 of identical dimensions. In another embodiment, the portions 14 of fairing 10 may be in different numbers and of different dimensions from each other. Optionally, the portions 14 of fairing 10 include different materials, for example a thermoplastic material, a thermosetting material, a composite material or an aluminum alloy.
Les portions 14 de carénage 10 sont reliées entre elles par plusieurs moyens de liaison 16. Le système 8 de nacelle représenté comprend deux moyens de liaison 16 identiques. Dans un autre mode de réalisation, le système 8 de nacelle comprend un nombre de moyens de liaison 16 différent, les moyens de liaison 16 étant identiques ou différents. The portions 14 of fairing 10 are interconnected by several connecting means 16. The nacelle system 8 shown comprises two identical connecting means 16. In another embodiment, the nacelle system 8 comprises a different number of connecting means 16, the connecting means 16 being identical or different.
Sur la figure 4, chaque moyen de liaison 16 est disposé entre deux portions 14 de carénage 10 de sorte que les portions 14 de carénage 10 forment le carénage 10. Plus précisément, chaque moyen de liaison 16 est disposé entre deux extrémités 20 de portion 14 de carénage 10 différentes. Les moyens de liaison 16 comprennent par exemple des tirants d’ assemblage 18, et/ou des vis, et/ou écrous et/ou rivets. Avantageusement les moyens de liaison 16 sont amovibles de manière à pouvoir dissocier les portions 14 de carénage 10. In Figure 4, each connecting means 16 is arranged between two portions 14 of fairing 10 so that the portions 14 of fairing 10 form the fairing 10. More precisely, each connecting means 16 is arranged between two ends 20 of portion 14 10 different fairings. The connecting means 16 include for example assembly tie rods 18, and/or screws, and/or nuts and/or rivets. Advantageously, the connecting means 16 are removable so as to be able to separate the portions 14 of the fairing 10.
Dans le mode de réalisation illustré sur la figure 4, chaque moyen de liaison 16 comprend trois tirants d’ assemblage 18 du carénage 10. Chaque tirant 18 est disposé entre deux équerres 22. Le nombre de portions 14 de carénage 10 permet par exemple d’ ajuster au mieux le carénage à la forme de la machine 2 électrique contre laquelle le carénage 10 est destiné à être plaqué. Le nombre de moyens de liaison 16 et leur nature garantissent par exemple que le carénage 10 est bien plaqué contre les ailettes 6 de la machine 2 électrique et/ou que l’ ajustement du carénage 10 autour de la machine 2 électrique ne sera pas modifié lors de l’utilisation de la machine 2 électrique. In the embodiment illustrated in Figure 4, each connecting means 16 comprises three assembly tie rods 18 of the fairing 10. Each tie rod 18 is arranged between two brackets 22. The number of portions 14 of fairing 10 allows for example to adjust the fairing as best as possible to the shape of the electric machine 2 against which the fairing 10 is intended to be pressed. The number of connection means 16 and their nature guarantee for example that the fairing 10 is well pressed against the fins 6 of the electric machine 2 and/or that the adjustment of the fairing 10 around the electric machine 2 will not be modified during of the use of the electric machine 2.
Dans un autre mode de réalisation, le moyen de liaison 16 est simplement une charnière, ou tout autre mode d’ accroche des portions 14 de carénage 10 entre elles. Au moins un moyen de liaison 16 reste ajustable comme décrit précédemment. In another embodiment, the connecting means 16 is simply a hinge, or any other method of attaching the portions 14 of fairing 10 to each other. At least one connecting means 16 remains adjustable as described above.
Dans un autre mode de réalisation, le dispositif d’ ajustement 12 permet de maintenir le carénage 10 dans une forme correspondant à une machine 2 électrique de forme non cylindrique de sorte que le carénage 10 est disposé autour des ailettes 6 de la machine 2 électrique, notamment au moyen de plusieurs portions 14 de carénage 10 et de moyens de liaison 16. In another embodiment, the adjustment device 12 makes it possible to maintain the fairing 10 in a shape corresponding to an electric machine 2 of non-cylindrical shape so that the fairing 10 is arranged around the fins 6 of the electric machine 2, in particular by means of several portions 14 of fairing 10 and connecting means 16.
Dans un mode de réalisation particulier, un carénage tel que décrit précédemment s'adapte par exemple à un moteur électrique et/ou à un moteur thermique et/ou à un générateur et/ou à un ventilateur et/ou à un échangeur. La machine 2 électrique comprend par exemple un moteur intelligent comprenant un moteur électrique et son organe de pilotage électronique avantageusement utilisé dans le domaine aéronautique. Dans un mode de réalisation, un moteur d’ aéronef comprenant un système 8 de nacelle tel que défini précédemment forme un module moteur d’ aéronef léger et compact prêt à être installé dans un aéronef. In a particular embodiment, a fairing as described above adapts for example to an electric motor and/or to a heat engine and/or to a generator and/or to a fan and/or to an exchanger. The electric machine 2 comprises for example an intelligent motor comprising an electric motor and its electronic control member advantageously used in the aeronautics field. In one embodiment, an aircraft engine comprising a nacelle system 8 as defined above forms a light and compact aircraft engine module ready to be installed in an aircraft.
En particulier la structure du module moteur permet d’assurer un refroidissement du moteur performant et ce indépendamment de l’ aéronef dans lequel le module moteur est installé. In particular, the structure of the engine module ensures efficient engine cooling, regardless of the aircraft in which the engine module is installed.
L ’installation du module moteur dans un aéronef est facilitée notamment grâce au caractère modulaire du module moteur, au refroidissement performant et autonome du module moteur, et au caractère amovible du système 8 de nacelle. The installation of the engine module in an aircraft is facilitated in particular thanks to the modular nature of the engine module, the efficient and autonomous cooling of the engine module, and the removable nature of the nacelle system 8.

Claims

REVENDICATIONS
1. Système (8) de nacelle pour une machine (2) électrique munie d’ ailettes (6) de refroidissement caractérisé en ce qu’il comprend un carénage ( 10) configuré pour épouser la forme de la machine (2) électrique et un dispositif d’ ajustement ( 12) configuré pour maintenir le carénage (10) et le plaquer autour des ailettes (6) de refroidissement de la machine (2) électrique, le carénage (4) comprenant au moins une portion ( 14) de carénage ( 10), le dispositif d’ ajustement ( 12) comprenant au moins un moyen de liaison ( 16) ajustable disposé entre deux extrémités (20) de portion ( 14) de carénage ( 10). 1. Nacelle system (8) for an electric machine (2) provided with cooling fins (6), characterized in that it comprises a fairing (10) configured to match the shape of the electric machine (2) and a adjustment device (12) configured to hold the fairing (10) and press it around the cooling fins (6) of the electric machine (2), the fairing (4) comprising at least one portion (14) of fairing ( 10), the adjustment device (12) comprising at least one adjustable connecting means (16) disposed between two ends (20) of portion (14) of fairing (10).
2. Système (8) selon la revendication 1 , dans lequel le carénage ( 10) comprend des trous (24) répartis le long d’une périphérie du carénage ( 10) et dans lequel le dispositif d’ ajustement ( 12) comprend des moyens de fixation (26) disposés dans les trous (24) de manière à fixer le carénage ( 10) à la machine (2) électrique. 2. System (8) according to claim 1, in which the fairing (10) comprises holes (24) distributed along a periphery of the fairing (10) and in which the adjustment device (12) comprises means fixing brackets (26) arranged in the holes (24) so as to fix the fairing (10) to the electric machine (2).
3. Système (8) selon l’une quelconque des revendications 1 et 2, dans lequel le moyen de liaison ( 16) comprend un tirant d’ assemblage ( 18) et au moins deux équerres (22) disposées chacune sur une extrémité (20) de portion ( 14) de carénage ( 10), les deux équerres (22) étant jointes par le tirant d’ assemblage ( 18). 3. System (8) according to any one of claims 1 and 2, wherein the connecting means (16) comprises an assembly tie rod (18) and at least two brackets (22) each arranged on one end (20). ) of portion (14) of fairing (10), the two brackets (22) being joined by the assembly tie rod (18).
4. Système (8) selon l’une quelconque des revendications 1 à 3 , dans lequel le carénage ( 10) comprend plusieurs portions ( 14) de carénage ( 10), le dispositif d’ ajustement ( 12) comprenant plusieurs moyens de liaison ( 16) disposés chacun entre deux extrémités (20) de portions ( 14) de carénage ( 10). 4. System (8) according to any one of claims 1 to 3, wherein the fairing (10) comprises several portions (14) of fairing (10), the adjustment device (12) comprising several connecting means ( 16) each arranged between two ends (20) of portions (14) of fairing (10).
5. Système (8) selon l’une quelconque des revendications 1 à 4, comprenant un matériau d’interface (28) en contact avec le carénage ( 10) et configuré pour être au contact des ailettes (6) de refroidissement, le matériau d’interface (28) étant configuré pour protéger les ailettes (6) et/ou permettre une interface thermique entre les ailettes (6) et le carénage ( 10). 5. System (8) according to any one of claims 1 to 4, comprising an interface material (28) in contact with the fairing (10) and configured to be in contact with the cooling fins (6), the material interface (28) being configured to protect the fins (6) and/or allow a thermal interface between the fins (6) and the fairing (10).
6. Système (8) selon l’une quelconque des revendications 1 à 5 , dans lequel le carénage ( 10) comprend un matériau thermiquement conducteur. 6. System (8) according to any one of claims 1 to 5, wherein the fairing (10) comprises a thermally conductive material.
7. Système (8) selon l’une quelconque des revendications 1 à 6, dans lequel le dispositif d’ ajustement ( 12) comprend un moyen de verrouillage (30) pour verrouiller l’ajustement du dispositif d’ ajustement ( 12). 7. System (8) according to any one of claims 1 to 6, wherein the adjustment device (12) comprises locking means (30) for locking the adjustment of the adjustment device (12).
8. Système (8) selon la revendication 7, dans lequel le moyen de verrouillage (30) comprend un écrou auto freinant. 8. System (8) according to claim 7, wherein the locking means (30) comprises a self-locking nut.
9. Machine (2) électrique comprenant un corps (4), des ailettes9. Electric machine (2) comprising a body (4), fins
(6) thermiquement conductrices réparties autour du corps (4), et un système (8) de nacelle selon l’une quelconque des revendications 1 à 8. (6) thermally conductive distributed around the body (4), and a nacelle system (8) according to any one of claims 1 to 8.
10. Machine (2) électrique selon la revendication 9, dans laquelle le carénage (10) comprend un matériau ayant un coefficient de dilatation thermique correspondant au coefficient de dilatation thermique du matériau du corps (4) de la machine (2) électrique. 10. Electric machine (2) according to claim 9, in which the fairing (10) comprises a material having a thermal expansion coefficient corresponding to the thermal expansion coefficient of the material of the body (4) of the electric machine (2).
PCT/FR2023/051193 2022-08-08 2023-07-27 Nacelle system for an electric machine WO2024033584A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2208181 2022-08-08
FR2208181A FR3138742A1 (en) 2022-08-08 2022-08-08 Nacelle system for an electric machine

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WO2024033584A1 true WO2024033584A1 (en) 2024-02-15

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636723A1 (en) * 1995-09-19 1997-03-27 Mitsubishi Electric Corp Electric AC motor with variable speed
US20050104458A1 (en) * 2003-11-14 2005-05-19 Siemens Aktiengesellschaft Housing for an electric machine with auxiliary ventilation
DE102013003241A1 (en) * 2013-02-27 2014-08-28 Sew-Eurodrive Gmbh & Co Kg Shroud integrated motor, has shroud for axially extending against inside of hood, where shroud is provided with inner fins, which comprise shoulder on which motor housing is abutted and fins fed airflow produced by fan along housing
US20150222160A1 (en) * 2014-01-31 2015-08-06 Fanuc Corporation Cooling device for electric motor and electric motor
CN206149096U (en) * 2016-11-21 2017-05-03 宁波王兴工艺品有限公司 Heat dissipation motor apparatu in kneader
FR3045235B1 (en) * 2015-12-11 2019-04-26 Moteurs Leroy-Somer Rotating electrical machine having a stator with a magnetic foil package and a housing for improving cooling efficiency
CN110620477A (en) * 2018-06-19 2019-12-27 大工科技（上海）有限公司 Heat dissipation formula motor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636723A1 (en) * 1995-09-19 1997-03-27 Mitsubishi Electric Corp Electric AC motor with variable speed
US20050104458A1 (en) * 2003-11-14 2005-05-19 Siemens Aktiengesellschaft Housing for an electric machine with auxiliary ventilation
DE102013003241A1 (en) * 2013-02-27 2014-08-28 Sew-Eurodrive Gmbh & Co Kg Shroud integrated motor, has shroud for axially extending against inside of hood, where shroud is provided with inner fins, which comprise shoulder on which motor housing is abutted and fins fed airflow produced by fan along housing
US20150222160A1 (en) * 2014-01-31 2015-08-06 Fanuc Corporation Cooling device for electric motor and electric motor
FR3045235B1 (en) * 2015-12-11 2019-04-26 Moteurs Leroy-Somer Rotating electrical machine having a stator with a magnetic foil package and a housing for improving cooling efficiency
CN206149096U (en) * 2016-11-21 2017-05-03 宁波王兴工艺品有限公司 Heat dissipation motor apparatu in kneader
CN110620477A (en) * 2018-06-19 2019-12-27 大工科技（上海）有限公司 Heat dissipation formula motor

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