EP3234372A1 - Compressor having a sealing system - Google Patents

Compressor having a sealing system

Info

Publication number
EP3234372A1
EP3234372A1 EP15823350.2A EP15823350A EP3234372A1 EP 3234372 A1 EP3234372 A1 EP 3234372A1 EP 15823350 A EP15823350 A EP 15823350A EP 3234372 A1 EP3234372 A1 EP 3234372A1
Authority
EP
European Patent Office
Prior art keywords
compressor
shaft
fins
compartment
wheel
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.)
Withdrawn
Application number
EP15823350.2A
Other languages
German (de)
French (fr)
Inventor
Patrick LEBRASSEUR
Nicolas Martin
Franck Giraud
Mathieu Lallemant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes de Controle Moteur SAS
Original Assignee
Valeo Systemes de Controle Moteur SAS
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 Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of EP3234372A1 publication Critical patent/EP3234372A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
    • F04D29/104—Shaft sealings especially adapted for elastic fluid pumps the sealing fluid being other than the working fluid or being the working fluid treated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric

Definitions

  • the present invention relates to the field of sealing systems, and more particularly to an electric or mechanical compressor with a sealing system.
  • An electric compressor is a device used to supercharge a heat engine and operating with an electric motor.
  • a mechanical or electrical compressor has a shaft rotatable up to 300000 rpm which extends into at least two compartments.
  • the first compartment may contain rotational guiding means and / or drive means of the shaft.
  • the first compartment can contain an electric motor and rotating guide elements such as ball bearings.
  • the second compartment may contain the compressor wheel connected to the end of the shaft.
  • a sealing system is disposed at the portion of the shaft between the two compartments.
  • This system is composed of at least one sealing segment disposed in a recess formed directly in the shaft.
  • the present invention therefore aims to overcome one or more of the disadvantages of the devices of the prior art by proposing a rotating shaft whose Sealing system is improved and thus avoids pollution of the guide elements, including bearings and the electric motor.
  • FIG. 1 is a schematic representation of a longitudinal sectional view of an embodiment of a device according to the invention with the pressures applied,
  • FIG. 2 is a representation of an elevational view of an element of the device according to the invention.
  • FIG. 3 is a representation of an exploded perspective view of an embodiment of a device according to the invention of FIG. 1,
  • FIG. 4 is a representation of a view of a compressor wheel of the device according to the invention.
  • the present invention relates to a compressor 100 illustrated in FIG. 1, comprising a rotating shaft 10 and a compressor wheel 16, equipped with a sealing system.
  • the sealing system is formed by at least compression vanes 18, 18 '.
  • the compressor is mechanical or electric.
  • the term electric compressor 100 an air compressor, volumetric or not and for example centrifugal or radial, driven by an electric motor, for the purpose of supercharging a heat engine.
  • the electric motor is a synchronous DC or AC motor, or any type of electric motor of the same type.
  • the electric motor is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).
  • the electric motor is a permanent magnet motor.
  • the electric compressor 100 illustrated in FIG. 1, comprises a rotating shaft 10, an electric motor (not visible), a compressor wheel 16 and a rotation guide system comprising bearings 17. and between at least two compartments 1, 2, defining two volumes of air. More specifically, an end 12 of the shaft opens into a first compartment 1 of the compressor.
  • the first compartment 1 comprises means for driving the shaft 10.
  • the first compartment 1 comprises an electric motor.
  • the other end 11 of the shaft opens into a second compartment 2 of the compressor.
  • the second compartment 2 comprises the wheel 16 of the compressor.
  • the electric motor makes it possible to rotate the shaft 10 of the electric compressor via the bearings 17. The shaft 10 thus causes the wheel 16 of the compressor 100 to rotate.
  • an end 12 of the shaft 10 is rotated. by the electric motor, and another end 11 of the shaft 10 rotates the wheel 16 of the compressor.
  • the intermediate portion of the shaft 10, located between the two compartments 1, 2 is protected by the body 20 of compressor.
  • This intermediate portion of the shaft 10 comprises a sealing member. By end means any portion of the shaft 10 which is not the intermediate part.
  • compartment means zones defining different air volumes. More specifically, the first compartment 1 or first zone defines the driving air volume, and the second compartment 2 or second zone defines the compression volume.
  • this sealing member is formed by a sealing segment 21 positioned on the side of the first compartment 1 comprising bearings 17 of the compressor. This sealing member thus protects the bearings 17 and the electric motor pollutants from the compression volume where the compressor wheel is located.
  • the sealing member is formed by at least two sealing segments.
  • a first segment positioned on the side compressor bearings and a second non-illustrated sealing segment positioned on the side of the compressor wheel. These segments act as a double protection of the bearings against pollution that may come from the compressor wheel.
  • the segment or segments are ring-shaped disposed around the shaft 10.
  • the shaft 10 is a conventional longitudinal shaft of cylindrical shape.
  • the shaft 10 rotates generally at a speed between 0 and 300000 rpm and preferably between 0 and 100000 rpm.
  • the shaft 10 is disposed in a bore of the body 20 of the compressor 100.
  • this unpolluted air inlet 141 is a vent hole 141 formed in the compressor body.
  • the vent hole 141 is disposed between the second compartment and the sealing segment 21.
  • the vent hole 141 is disposed between the two sealing segments.
  • the vent hole 141 is disposed between the first compartment 1 and the two segments, more precisely between the first compartment 1 and the segment located closest to the first compartment 1.
  • the seal is improved by the presence of compression fins 18.
  • the fins are disposed between the two compartments 1, 2.
  • the sealing member 21 is located between the fins 18, 18 'and the first compartment 1.
  • the fins 18, 18 ' are disposed between the first compartment 1 and the two segments, more precisely between the first compartment 1 and the segment located closest to the first compartment 1.
  • the fins 18 are located directly on the shaft 10, and more precisely around the shaft.
  • the fins 18 are formed directly on the surface of the shaft, for example by overmolding, molding or machining.
  • the fins 18 are fixed on the shaft 10.
  • the fins 18 are located on an intermediate circular member 15, the member 15 itself being in contact, that is to say rigidly coupled, with the shaft 10.
  • the member 15 is thus disposed between the shaft 10 and the fins 18.
  • the fins 18 are formed directly on the surface of the intermediate member, for example by overmoulding , molding or machining.
  • the fins 18 are fixed on the intermediate member.
  • the intermediate member has for example the form of a ring or a sleeve.
  • the sealing segment is disposed in a recess 150 provided for this purpose in the complementary piece.
  • the recess 150 is a groove 150.
  • the fins are oriented along the longitudinal axis X of rotation of the shaft 10.
  • the fins 18 ' are situated on the internal face 160 of the wheel 16 of the compressor.
  • the inner face 160 of the compressor wheel is the face oriented towards the bearings 17.
  • the fins are oriented, that is to say bent, in the direction of rotation of the wheel. In this way the fins play a centrifugal role and the air is expelled to the outside of the wheel, and not towards its center 19.
  • the fins are for example formed by overmolding, molding or machining.
  • the fins 18, 18 ' are all forms for moving the air to prevent it from circulating to the first compartment 1, and more particularly to the bearings 17.
  • the fins 18, 18 ' may for example be blades or blades.
  • the fins 18, 18 'of compression are associated with the arrival 141 of air.
  • this additional air inlet 141 supplies the compression fins 18, 18 '.
  • the vanes 18, 18 'rotating compress the air already present at the shaft, but also the air arriving via the vent hole 141. This creates an air compression preventing the air of the second compartment 2 to pass in the first compartment 1.
  • the pressure P2 of the compartment 2 where is located the wheel 16 of the compressor is greater than the pressure PI at the intermediate zone of the shaft 10.
  • the fins allow to increase the pressure Pl.
  • the fins can create a pressure P1 at the intermediate zone of the shaft 10 equal to the pressure P2 of the compartment 2 where the wheel 16 of the compressor is located.
  • the fins can create a pressure P1 at the intermediate zone of the shaft 10 greater than the pressure P2 of the compartment 2 where the wheel 16 of the compressor is located.
  • the fins thus make it possible to prevent the air from the compression volume 2 from polluting the driving volume 1. More specifically, these fins prevent the polluted air coming from the wheel 16 of the compressor from circulating towards the bearings 17, and from more generally towards the electric motor.
  • the sealing segment 21 disposed on the side of the bearings also has the role of avoiding suction at the bearings, more precisely through the bearings. This segment thus avoids the aspiration of air but also lubricant bearings.
  • the bearings and the electric motor are thus protected from pollutants such as oil and / or recirculating gases in the air flow coming from the compressor wheel.
  • pollutants such as oil and / or recirculating gases in the air flow coming from the compressor wheel.
  • the presence of the fins thus makes it possible to avoid the early deterioration of the guide of the axis and the corrosion of the engine, which increases the performance and longevity of the compressor.
  • the invention also relates to an electric compressor, according to the invention, supercharging for a motor vehicle. More specifically, the invention also relates to an electric compressor, according to the invention, equipped with a variable reluctance motor.
  • the variable reluctance motor drives the compression wheel in rotation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Compressor (AREA)

Abstract

The present invention relates to a compressor (100) having a rotating shaft (10) extending between at least two regions (1, 2) that define a driving volume and an air compression volume, respectively, the compressor being equipped with a sealing system, disposed around the shaft, that is formed by at least compression fins (18, 18') disposed between the two regions (1, 2). The fins (18, 18') are situated on the shaft (10) or on the internal face of the wheel (16) of the compressor.

Description

COMPRESSEUR AVEC SYSTEME D'ETANCHEITE  COMPRESSOR WITH SEALING SYSTEM
La présente invention concerne le domaine des systèmes d'étanchéité, et plus particulièrement un compresseur électrique ou mécanique avec un système d'étanchéité. The present invention relates to the field of sealing systems, and more particularly to an electric or mechanical compressor with a sealing system.
La présente invention s'applique par exemple aux arbres tournants des compresseurs mécaniques et électriques. Un compresseur électrique est un dispositif utilisé pour suralimenter un moteur thermique et fonctionnant avec un moteur électrique.  The present invention applies for example to rotating shafts of mechanical and electrical compressors. An electric compressor is a device used to supercharge a heat engine and operating with an electric motor.
Un compresseur mécanique ou électrique comporte un arbre pouvant tourner jusqu'à 300000 tours par minutes qui s'étend dans au moins deux compartiments. Le premier compartiment peut contenir des moyens de guidage en rotation et/ou des moyens d'entraînement de l'arbre. Dans un compresseur électrique, le premier compartiment peut contenir un moteur électrique et des éléments de guidage en rotation tels que des roulements à billes. Le deuxième compartiment peut contenir la roue du compresseur connectée à l'extrémité de l'arbre.  A mechanical or electrical compressor has a shaft rotatable up to 300000 rpm which extends into at least two compartments. The first compartment may contain rotational guiding means and / or drive means of the shaft. In an electric compressor, the first compartment can contain an electric motor and rotating guide elements such as ball bearings. The second compartment may contain the compressor wheel connected to the end of the shaft.
Dans un tel dispositif il est nécessaire qu'une étanchéité maximale soit maintenue au niveau de l'arbre entre le premier et le deuxième compartiment. En effet, des polluants du moteur, tels que l'huile, provenant de la roue du compresseur, peuvent pénétrer dans le premier compartiment au niveau de la portion de l'arbre entre les deux compartiments. Ces polluants peuvent par exemple dégrader le guidage de l'arbre et corroder le moteur, diminuant ainsi les performances et la longévité du dispositif.  In such a device it is necessary that a maximum seal is maintained at the level of the shaft between the first and the second compartment. Indeed, pollutants from the engine, such as oil, from the compressor wheel, can enter the first compartment at the portion of the shaft between the two compartments. These pollutants can for example degrade the guidance of the shaft and corrode the engine, thus reducing the performance and longevity of the device.
Actuellement, pour éviter cette dégradation, un système d'étanchéité est disposé au niveau de la portion de l'arbre entre les deux compartiments. Ce système est composé d'un moins un segment d'étanchéité disposé dans un évidement formé directement dans l'arbre.  Currently, to prevent this degradation, a sealing system is disposed at the portion of the shaft between the two compartments. This system is composed of at least one sealing segment disposed in a recess formed directly in the shaft.
Cependant, les variations de pression dans les compartiments et d'éventuels problèmes de voilage de l'évidement peuvent dans certains cas se cumuler et provoquer des problèmes d'étanchéité.  However, the pressure variations in the compartments and possible problems of voidage of the recess can in some cases accumulate and cause sealing problems.
La présente invention a donc pour objet de pallier un ou plusieurs des inconvénients des dispositifs de l'art antérieur en proposant un arbre tournant dont le système d'étanchéité est amélioré et permet ainsi d'éviter la pollution des éléments de guidage, et notamment des roulements et du moteur électrique. The present invention therefore aims to overcome one or more of the disadvantages of the devices of the prior art by proposing a rotating shaft whose Sealing system is improved and thus avoids pollution of the guide elements, including bearings and the electric motor.
D'autres buts, caractéristiques et avantages de l'invention seront mieux compris et apparaîtront plus clairement à la lecture de la description faite, ci-après, en se référant aux figures annexées, données à titre d'exemple et dans lesquelles: Other objects, features and advantages of the invention will be better understood and will appear more clearly on reading the description given hereinafter with reference to the appended figures given by way of example and in which:
- la figure 1 est une représentation schématique d'une vue en coupe longitudinale d'un mode de réalisation d'un dispositif selon l'invention avec les pressions mise en œuvre,  FIG. 1 is a schematic representation of a longitudinal sectional view of an embodiment of a device according to the invention with the pressures applied,
- la figure 2 est une représentation d'une vue en élévation d'un élément du dispositif selon l'invention,  FIG. 2 is a representation of an elevational view of an element of the device according to the invention,
- la figure 3 est une représentation d'une vue en perspective éclatée d'un mode de réalisation d'un dispositif selon l'invention de la figure 1,  FIG. 3 is a representation of an exploded perspective view of an embodiment of a device according to the invention of FIG. 1,
- la figure 4 est une représentation d'une vue d'une roue de compresseur du dispositif selon l'invention.  - Figure 4 is a representation of a view of a compressor wheel of the device according to the invention.
Selon un mode de réalisation, la présente invention concerne un compresseur 100 illustré figure 1, comportant un arbre tournant 10 et une roue 16 de compresseur, équipé d'un système d'étanchéité. Dans le cadre de l'invention, le système d'étanchéité est formé par au moins des ailettes 18, 18' de compression. Le compresseur est mécanique ou électrique.  According to one embodiment, the present invention relates to a compressor 100 illustrated in FIG. 1, comprising a rotating shaft 10 and a compressor wheel 16, equipped with a sealing system. In the context of the invention, the sealing system is formed by at least compression vanes 18, 18 '. The compressor is mechanical or electric.
Dans le cadre de l'invention, on entend par compresseur 100 électrique, un compresseur d'air, volumétrique ou non et par exemple centrifuge ou radial, entraîné par un moteur électrique, dans le but de suralimenter un moteur thermique.  In the context of the invention, the term electric compressor 100, an air compressor, volumetric or not and for example centrifugal or radial, driven by an electric motor, for the purpose of supercharging a heat engine.
Selon un mode de réalisation de l'invention, le moteur électrique est un moteur à courant continu ou alternatif, synchrone, ou tout type de moteur électrique du même type.  According to one embodiment of the invention, the electric motor is a synchronous DC or AC motor, or any type of electric motor of the same type.
Selon un mode de réalisation de l'invention, le moteur électrique est un moteur à reluctance variable (également appelée machine SRM pour Switched Reluctance Motor selon la terminologie anglaise). Selon un mode de réalisation de l'invention, le moteur électrique est un moteur à aimants permanents. According to one embodiment of the invention, the electric motor is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology). According to one embodiment of the invention, the electric motor is a permanent magnet motor.
Le compresseur électrique 100, illustré figure 1, comprend un arbre 10 mobile en rotation, un moteur électrique (non visible), une roue 16 de compresseur et un système de guidage en rotation comportant des roulements 17. L'arbre 10 s'étend dans et entre au moins deux compartiments 1, 2, définissant deux volumes d'air. Plus précisément, une extrémité 12 de l'arbre débouche à l'intérieur d'un premier compartiment 1 du compresseur. Selon un mode de réalisation de l'invention, le premier compartiment 1 comporte des moyens d'entraînement de l'arbre 10. Par exemple, pour un compresseur électrique, le premier compartiment 1 comporte un moteur électrique. L'autre extrémité 11 de l'arbre débouche à l'intérieur d'un deuxième compartiment 2 du compresseur. Selon un mode de réalisation de l'invention le deuxième compartiment 2 comporte la roue 16 du compresseur. Le moteur électrique permet la mise en rotation de l'arbre 10 du compresseur électrique via les roulements 17. L'arbre 10 entraine ainsi en rotation la roue 16 du compresseur 100. Plus précisément une extrémité 12 de l'arbre 10 est entraînée en rotation par le moteur électrique, et une autre extrémité 11 de l'arbre 10 entraine en rotation la roue 16 du compresseur. La partie intermédiaire de l'arbre 10, située entre les 2 compartiments 1, 2 est protégé par le corps 20 de compresseur. Cette partie intermédiaire de l'arbre 10 comporte un organe d'étanchéité. On entend par extrémité toute portion de l'arbre 10 qui n'est pas la partie intermédiaire.  The electric compressor 100, illustrated in FIG. 1, comprises a rotating shaft 10, an electric motor (not visible), a compressor wheel 16 and a rotation guide system comprising bearings 17. and between at least two compartments 1, 2, defining two volumes of air. More specifically, an end 12 of the shaft opens into a first compartment 1 of the compressor. According to one embodiment of the invention, the first compartment 1 comprises means for driving the shaft 10. For example, for an electric compressor, the first compartment 1 comprises an electric motor. The other end 11 of the shaft opens into a second compartment 2 of the compressor. According to one embodiment of the invention the second compartment 2 comprises the wheel 16 of the compressor. The electric motor makes it possible to rotate the shaft 10 of the electric compressor via the bearings 17. The shaft 10 thus causes the wheel 16 of the compressor 100 to rotate. More precisely, an end 12 of the shaft 10 is rotated. by the electric motor, and another end 11 of the shaft 10 rotates the wheel 16 of the compressor. The intermediate portion of the shaft 10, located between the two compartments 1, 2 is protected by the body 20 of compressor. This intermediate portion of the shaft 10 comprises a sealing member. By end means any portion of the shaft 10 which is not the intermediate part.
Dans le cadre de l'invention, on entend par compartiment, des zones définissant des volumes d'air différents. Plus précisément, le premier compartiment 1 ou première zone définit le volume d'air d'entraînement, et le deuxième compartiment 2 ou deuxième zone définit le volume de compression.  In the context of the invention, the term "compartment" means zones defining different air volumes. More specifically, the first compartment 1 or first zone defines the driving air volume, and the second compartment 2 or second zone defines the compression volume.
Selon un mode de réalisation de l'invention cet organe d'étanchéité est formé pa r un segment d'étanchéité 21 positionné du coté du premier compartiment 1 comportant des roulements 17 du compresseur. Cet organe d'étanchéité permet ainsi de protéger les roulements 17 et le moteur électrique des polluants provenant du volume de compression où est situé la roue du compresseur.  According to one embodiment of the invention, this sealing member is formed by a sealing segment 21 positioned on the side of the first compartment 1 comprising bearings 17 of the compressor. This sealing member thus protects the bearings 17 and the electric motor pollutants from the compression volume where the compressor wheel is located.
Selon un mode de réalisation de l'invention non illustrée, l'organe d'étanchéité est formé par au moins deux segments d'étanchéité. Un premier segment positionné du coté des roulements du compresseur et un deuxième segment d'étanchéité non illustré positionné du coté de la roue du compresseur. Ces segments jouent le rôle d'une double protection des roulements contre la pollution pouvant provenir de la roue du compresseur. According to one embodiment of the invention not illustrated, the sealing member is formed by at least two sealing segments. A first segment positioned on the side compressor bearings and a second non-illustrated sealing segment positioned on the side of the compressor wheel. These segments act as a double protection of the bearings against pollution that may come from the compressor wheel.
Selon un mode de réalisation de l'invention, le ou les segments sont en forme d'anneau disposé autour de l'arbre 10.  According to one embodiment of the invention, the segment or segments are ring-shaped disposed around the shaft 10.
Dans le cadre de l'invention, l'arbre 10 est un arbre classique, longitudinal, de forme cylindrique. L'arbre 10 tourne en général à une vitesse comprise entre 0 et 300000 tr/min et de préférence entre 0 et 100000 tr/min.  In the context of the invention, the shaft 10 is a conventional longitudinal shaft of cylindrical shape. The shaft 10 rotates generally at a speed between 0 and 300000 rpm and preferably between 0 and 100000 rpm.
L'arbre 10 est disposé dans un alésage du corps 20 du compresseur 100.  The shaft 10 is disposed in a bore of the body 20 of the compressor 100.
Dans le cadre de l'invention, au niveau de la partie intermédiaire de l'arbre, c'est à dire entre les deux compartiments 1, 2, est positionnée une arrivée 141 d'air non pollué.  In the context of the invention, at the intermediate portion of the shaft, that is to say between the two compartments 1, 2, is positioned an arrival 141 of unpolluted air.
Selon un mode de réalisation de l'invention, cette arrivée 141 d'air non pollué est un trou d'évent 141 formé dans le corps du compresseur. Lorsque le compresseur comporte un seul segment d'étanchéité 21, le trou d'évent 141 est disposé entre le deuxième compartiment et le segment d'étanchéité 21. Lorsque le compresseur comporte deux segments d'étanchéité, le trou d'évent 141 est disposé entre les deux segments d'étanchéité. Selon un mode de réalisation de l'invention, le trou d'évent 141 est disposé entre le premier 1 compartiment et les deux segments, plus précisément entre le premier 1 compartiment et le segment situé le plus proche du premier 1 compartiment.  According to one embodiment of the invention, this unpolluted air inlet 141 is a vent hole 141 formed in the compressor body. When the compressor comprises a single sealing segment 21, the vent hole 141 is disposed between the second compartment and the sealing segment 21. When the compressor comprises two sealing segments, the vent hole 141 is disposed between the two sealing segments. According to one embodiment of the invention, the vent hole 141 is disposed between the first compartment 1 and the two segments, more precisely between the first compartment 1 and the segment located closest to the first compartment 1.
Dans le cadre de l'invention, l'étanchéité est améliorée par la présence d'ailettes 18 de compression.  In the context of the invention, the seal is improved by the presence of compression fins 18.
Selon un mode de réalisation de l'invention, les ailettes sont disposées entre les deux compartiments 1, 2. Dans ce cas l'organe d'étanchéité 21 est situé entre les ailettes 18, 18' et le premier compartiment 1.  According to one embodiment of the invention, the fins are disposed between the two compartments 1, 2. In this case the sealing member 21 is located between the fins 18, 18 'and the first compartment 1.
Selon un mode de réalisation de l'invention, les ailettes 18, 18' sont disposées entre le premier 1 compartiment et les deux segments, plus précisément entre le premier 1 compartiment et le segment situé le plus proche du premier 1 compartiment. Selon une première variante de l'invention non illustrée, les ailettes 18 sont situées directement sur l'arbre 10, et plus précisément tout autour de l'arbre. Selon un mode de réalisation de l'invention, les ailettes 18 sont formées directement sur la surface de l'arbre, par exemple par surmoulage, moulage ou usinage. Selon un autre mode de réalisation de l'invention les ailettes 18 sont fixées sur l'arbre 10. According to one embodiment of the invention, the fins 18, 18 'are disposed between the first compartment 1 and the two segments, more precisely between the first compartment 1 and the segment located closest to the first compartment 1. According to a first variant of the invention not illustrated, the fins 18 are located directly on the shaft 10, and more precisely around the shaft. According to one embodiment of the invention, the fins 18 are formed directly on the surface of the shaft, for example by overmolding, molding or machining. According to another embodiment of the invention, the fins 18 are fixed on the shaft 10.
Selon une deuxième variante de l'invention illustrée figure 1 à 2, les ailettes 18 sont situées sur un organe 15 circulaire intermédiaire, l'organe 15 étant lui-même en contact, c'est-à-dire rigidement couplé, avec l'arbre 10. L'organe 15 est ainsi disposé entre l'arbre 10 et les ailettes 18. Selon un mode de réalisation de l'invention, les ailettes 18 sont formées directement sur la surface de l'organe 15 intermédiaire, par exemple par surmoulage, moulage ou usinage. Selon un autre de réalisation de l'invention les ailettes 18 sont fixées sur l'organe 15 intermédiaire. L'organe 15 intermédiaire a par exemple la forme d'une bague ou d'un manchon. Dans cette variante, le segment d'étanchéité est disposé dans un évidement 150 prévu à cet effet dans la pièce complémentaire. Selon un mode de réalisation l'évidemment 150 est une rainure 150.  According to a second variant of the invention illustrated in FIGS. 1 to 2, the fins 18 are located on an intermediate circular member 15, the member 15 itself being in contact, that is to say rigidly coupled, with the shaft 10. The member 15 is thus disposed between the shaft 10 and the fins 18. According to one embodiment of the invention, the fins 18 are formed directly on the surface of the intermediate member, for example by overmoulding , molding or machining. According to another embodiment of the invention the fins 18 are fixed on the intermediate member. The intermediate member has for example the form of a ring or a sleeve. In this variant, the sealing segment is disposed in a recess 150 provided for this purpose in the complementary piece. According to one embodiment, the recess 150 is a groove 150.
Selon un mode de réalisation de l'invention de ces deux variantes, les ailettes sont orientées selon l'axe X longitudinal de rotation de l'arbre 10.  According to one embodiment of the invention of these two variants, the fins are oriented along the longitudinal axis X of rotation of the shaft 10.
Selon une troisième variante de l'invention, illustrée figure 4 les ailettes 18' sont situées sur la face interne 160 de la roue 16 du compresseur. Dans le cadre de l'invention, la face interne 160 de la roue du compresseur est la face orientée vers les roulements 17. Les ailettes sont orientées, c'est à dire courbées, dans le sens de rotation de la roue. De cette façon les ailettes jouent un rôle centrifuge et l'air est expulsé vers l'extérieur de la roue, et non pas vers son centre 19. Les ailettes sont par exemple formées par surmoulage, moulage ou usinage. Dans le cadre de l'invention, les ailettes 18, 18' sont mises en rotation avec l'arbre 10 ou la roue 16 du compresseur.  According to a third variant of the invention, illustrated in FIG. 4, the fins 18 'are situated on the internal face 160 of the wheel 16 of the compressor. In the context of the invention, the inner face 160 of the compressor wheel is the face oriented towards the bearings 17. The fins are oriented, that is to say bent, in the direction of rotation of the wheel. In this way the fins play a centrifugal role and the air is expelled to the outside of the wheel, and not towards its center 19. The fins are for example formed by overmolding, molding or machining. In the context of the invention, the fins 18, 18 'are rotated with the shaft 10 or the wheel 16 of the compressor.
Selon un mode de réalisation de l'invention, les ailettes 18, 18' sont toutes formes permettant de déplacer l'air afin d'éviter qu'il ne circule vers le premier compartiment 1, et plus particulièrement vers les roulements 17. Les ailettes 18, 18' peuvent par exemple être des aubes ou des pales. Dans le cadre de l'invention, les ailettes 18, 18' de compression sont associées à l'arrivée 141 d'air. According to one embodiment of the invention, the fins 18, 18 'are all forms for moving the air to prevent it from circulating to the first compartment 1, and more particularly to the bearings 17. The fins 18, 18 'may for example be blades or blades. In the context of the invention, the fins 18, 18 'of compression are associated with the arrival 141 of air.
Comme illustré figure 1, cette arrivée d'air 141 supplémentaire alimente les ailettes 18, 18' de compression. Les ailettes 18, 18' en tournant compriment l'air déjà présent au niveau de l'arbre, mais également l'air arrivant via le trou d'évent 141. Cela crée une compression d'air empêchant l'air du deuxième compartiment 2 de passer dans le premier compartiment 1. En l'absence d'ailette, la pression P2 du compartiment 2 où est située la roue 16 du compresseur est supérieure à la pression PI au niveau de la zone intermédiaire de l'arbre 10. Les ailettes permettent d'augmenter la pression Pl.  As illustrated in FIG. 1, this additional air inlet 141 supplies the compression fins 18, 18 '. The vanes 18, 18 'rotating compress the air already present at the shaft, but also the air arriving via the vent hole 141. This creates an air compression preventing the air of the second compartment 2 to pass in the first compartment 1. In the absence of fin, the pressure P2 of the compartment 2 where is located the wheel 16 of the compressor is greater than the pressure PI at the intermediate zone of the shaft 10. The fins allow to increase the pressure Pl.
Selon un mode de réalisation de l'invention, les ailettes permettent de créer une pression PI au niveau de la zone intermédiaire de l'arbre 10 égale à la pression P2 du compartiment 2 où est située la roue 16 du compresseur.  According to one embodiment of the invention, the fins can create a pressure P1 at the intermediate zone of the shaft 10 equal to the pressure P2 of the compartment 2 where the wheel 16 of the compressor is located.
Selon un mode de réalisation de l'invention, les ailettes permettent de créer une pression PI au niveau de la zone intermédiaire de l'arbre 10 supérieure à la pression P2 du compartiment 2 où est située la roue 16 du compresseur.  According to one embodiment of the invention, the fins can create a pressure P1 at the intermediate zone of the shaft 10 greater than the pressure P2 of the compartment 2 where the wheel 16 of the compressor is located.
Les ailettes permettent ainsi d'empêcher l'air du volume de compression 2 de polluer le volume d'entraînement 1. Plus précisément, ces ailettes empêchent l'air pollué provenant de la roue 16 du compresseur de circuler vers les roulements 17, et de manière plus générale vers le moteur électrique.  The fins thus make it possible to prevent the air from the compression volume 2 from polluting the driving volume 1. More specifically, these fins prevent the polluted air coming from the wheel 16 of the compressor from circulating towards the bearings 17, and from more generally towards the electric motor.
Le segment d'étanchéité 21 disposé du coté des roulements a également pour rôle d'éviter une aspiration au niveau des roulements, plus précisément à travers les roulements. Ce segment évite ainsi l'aspiration d'air mais également de lubrifiant des roulements.  The sealing segment 21 disposed on the side of the bearings also has the role of avoiding suction at the bearings, more precisely through the bearings. This segment thus avoids the aspiration of air but also lubricant bearings.
Les roulements et le moteur électrique sont ainsi protégés des polluants tels que l'huile et/ou des gaz de recirculation se trouvant dans le flux d'air provenant de la roue du compresseur. La présence des ailettes permet ainsi d'éviter les dégradations précoces du guidage de l'axe et la corrosion du moteur, ce qui augmente les performances et la longévité du compresseur.  The bearings and the electric motor are thus protected from pollutants such as oil and / or recirculating gases in the air flow coming from the compressor wheel. The presence of the fins thus makes it possible to avoid the early deterioration of the guide of the axis and the corrosion of the engine, which increases the performance and longevity of the compressor.
L'invention concerne également un compresseur électrique, selon l'invention, de suralimentation pour véhicule automobile. Plus précisément, l'invention concerne également un compresseur électrique, selon l'invention, équipé d'un moteur à reluctance variable. Le moteur à reluctance variable entraine la roue de compression en rotation. La portée de la présente invention ne se limite pas aux détails donnés ci-dessus et permet des modes de réalisation sous de nombreuses autres formes spécifiques sans s'éloigner du domaine d'application de l'invention. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration, et peuvent être modifiés sans toutefois sortir de la portée définie par les revendications. The invention also relates to an electric compressor, according to the invention, supercharging for a motor vehicle. More specifically, the invention also relates to an electric compressor, according to the invention, equipped with a variable reluctance motor. The variable reluctance motor drives the compression wheel in rotation. The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claims.

Claims

REVENDICATIONS
1. Compresseur (100) comportant un arbre (10) tournant, s'étendant entre au moins deux zones (1, 2), définissant respectivement un volume d'entraînement et un volume de compression d'air, le compresseur étant équipé d'un système d'étanchéité, disposée autour de l'arbre, formé par au moins des ailettes (18, 18') de compression disposée entre les deux zones (1, 2). A compressor (100) having a rotating shaft (10) extending between at least two zones (1, 2) respectively defining a driving volume and a volume of air compression, the compressor being equipped with a sealing system, arranged around the shaft, formed by at least compression fins (18, 18 ') disposed between the two zones (1, 2).
2. Compresseur (100) selon la revendication 1, dans lequel les ailettes (18) de compression sont orientées selon un axe X longitudinal de rotation de l'arbre (10).  2. Compressor (100) according to claim 1, wherein the fins (18) of compression are oriented along a longitudinal axis X of rotation of the shaft (10).
3. Compresseur (100) selon une des revendications 1 ou 2, dans lequel les ailettes 3. Compressor (100) according to one of claims 1 or 2, wherein the fins
(18) sont situées directement sur l'arbre (10). (18) are located directly on the shaft (10).
4. Compresseur (100) selon une des revendications 1 ou 2, dans lequel les ailettes 4. Compressor (100) according to one of claims 1 or 2, wherein the fins
(18) sont situées sur un organe (15) circulaire intermédiaire, de type bague, l'organe (15) étant lui-même en contact avec l'arbre (10). (18) are located on an intermediate ring-shaped member (15), the member (15) itself being in contact with the shaft (10).
5. Compresseur (100) selon la revendication 1, dans lequel les ailettes (18') sont situées sur la face interne (160) d'une roue (16) du compresseur situé dans la deuxième zone (2).  5. Compressor (100) according to claim 1, wherein the fins (18 ') are located on the inner face (160) of a wheel (16) of the compressor located in the second zone (2).
6. Compresseur (100) selon une des revendications 1 à 5, comportant un segment d'étanchéité (21) disposé entre les ailettes (18) et la première zone (1).  6. Compressor (100) according to one of claims 1 to 5, comprising a sealing segment (21) disposed between the fins (18) and the first zone (1).
7. Compresseur (100) selon une des revendications 1 à 6, dans lequel la première zone (1) comporte des moyens d'entraînement de l'arbre et la deuxième zone (2) comporte la roue du compresseur.  7. Compressor (100) according to one of claims 1 to 6, wherein the first zone (1) comprises drive means of the shaft and the second zone (2) comprises the compressor wheel.
8. Compresseur (100) selon une des revendications 1 à 7, comportant un moteur électrique.  8. Compressor (100) according to one of claims 1 to 7, comprising an electric motor.
9. Compresseur (100) selon la revendication 8, dans le lequel le moteur électrique est un moteur à reluctance variable.  The compressor (100) of claim 8, wherein the electric motor is a variable reluctance motor.
EP15823350.2A 2014-12-19 2015-12-14 Compressor having a sealing system Withdrawn EP3234372A1 (en)

Applications Claiming Priority (2)

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FR1462969A FR3030648B1 (en) 2014-12-19 2014-12-19 COMPRESSOR WITH SEALING SYSTEM
PCT/FR2015/053484 WO2016097563A1 (en) 2014-12-19 2015-12-14 Compressor having a sealing system

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DE102017121777A1 (en) * 2017-09-20 2019-03-21 Lutz Pumpen Gmbh Modified side channel pump and method for operating such

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WO2016097563A1 (en) 2016-06-23
FR3030648B1 (en) 2019-05-03

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