EP3181907A1 - Scroll compressor for an air-conditioning system for a motor vehicle - Google Patents

Scroll compressor for an air-conditioning system for a motor vehicle Download PDF

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Publication number
EP3181907A1
EP3181907A1 EP16200303.2A EP16200303A EP3181907A1 EP 3181907 A1 EP3181907 A1 EP 3181907A1 EP 16200303 A EP16200303 A EP 16200303A EP 3181907 A1 EP3181907 A1 EP 3181907A1
Authority
EP
European Patent Office
Prior art keywords
compressor
sealing member
friction plate
housing
spiral
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.)
Granted
Application number
EP16200303.2A
Other languages
German (de)
French (fr)
Other versions
EP3181907B1 (en
Inventor
Augustin Bellet
Hironobu Deguchi
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 Japan Co Ltd
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Valeo Japan Co Ltd
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Filing date
Publication date
Application filed by Valeo Japan Co Ltd filed Critical Valeo Japan Co Ltd
Publication of EP3181907A1 publication Critical patent/EP3181907A1/en
Application granted granted Critical
Publication of EP3181907B1 publication Critical patent/EP3181907B1/en
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/603—Centering; Aligning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/801—Wear plates

Definitions

  • the present invention relates to the field of scroll compressors equipping air conditioning systems for motor vehicles.
  • Motor vehicles are commonly equipped with a ventilation, heating and / or air conditioning system. Such an installation is particularly dedicated to the treatment of the air sent into the cabin of the vehicle for its heating or cooling according to the comfort desired by the passengers.
  • the installation typically cooperates with a closed air conditioning circuit through which circulates a refrigerant fluid.
  • the air conditioning circuit essentially comprises a compressor, a condenser, a pressure reducer and an evaporator.
  • the fluid is compressed in the gas phase by the compressor, converted into a liquid phase in the condenser, expanded at low pressure by the expander and then converted into a gas phase in the evaporator and again conveyed to the compressor.
  • Such a scroll compressor comprises a fluid compression device employing a pair of spirals nested one inside the other. One of the spirals is fixed while the other spiral is radially orbitant to compress the refrigerant fluid between them.
  • the spirals are housed in a compression chamber formed inside a lid assembled to a housing.
  • the fixed spiral is secured to the housing and the moving coil is driven by a motor housed in the housing.
  • the movable spiral axially bears in sliding friction against a plate interposed between the housing and the compression chamber.
  • the gaseous fluid is sucked into the housing from the air conditioning circuit as a result of relative mobility between the scrolls.
  • the fluid is then compressed between the spirals and is forced out of the compression chamber to the air conditioning circuit.
  • a sealing member may then be disposed between the cover and the housing.
  • the components of the scroll compressor are centered relative to each other by centering pins and are interconnected by screws. These centering pins generate the presence of bosses that extend radially outwardly of the compressor. These bosses directly impact the size of the compressor because they can interfere with a form of equipment to accommodate the compressor. These centering pins can not be brought closer to the center of the compressor because the available space is limited by the presence of other parts or components of the compressor.
  • the object of the invention is therefore a scroll compressor comprising a device for compressing a refrigerant fluid mounted on a housing and covered by a cylinder head, the compression device implementing at least one fixed spiral and a movable spiral. bearing against a friction plate interposed between the housing and the compression device, wherein a sealing member is interposed between the housing and the cylinder head, characterized in that the sealing member is centered on the housing by placing in support an inner edge of the sealing member against an outer edge of the friction plate.
  • the sealing member makes it possible to prevent an escape of the refrigerant fluid between the cylinder head and the housing in their bearing zone against each other.
  • Such support is in particular an axial support of the cylinder head against the housing.
  • an outer periphery of a ring constituting the sealing member advantageously only partially surrounds an outer periphery of the friction plate on which the moving spiral of the compression device rubs.
  • the overall ring conformation of the sealing member does not imply a totally circular conformation of its outer edge and / or its inner edge, as advantageously referred to later.
  • the flat arrangement of the ring, in particular disc-shaped, is to appreciate in its entirety, axially extended reliefs may be formed in whole or part on one side of the ring.
  • the purpose of the present invention is to limit at best the overall radial size of the compressor and this by simplifying the assembly of compressor components between them.
  • the radial size of the compressor is at best restricted to facilitate its easy installation in a congested and imposed environment of the vehicle.
  • the main direction of extension of the compressor 1 is typically identified according to its axial extension illustrated by the broken line A on the Figures 1 to 3 .
  • the notion of radial extension compared to the notion of axial extension, the first defining transverse directions and in particular perpendicular to the axis A.
  • the notion of interior or exterior is defined by in a radial direction, a surface oriented towards or facing the axis A being described as interior while a surface oriented towards or facing the environment surrounding the compressor is described as external.
  • a scroll compressor 1 is illustrated for equipping an air conditioning circuit of a motor vehicle.
  • the compressor 1 is here partially represented since only one of its axial ends is illustrated.
  • Such a compressor 1 is intended to be implanted in this air conditioning circuit so as to increase the pressure of a refrigerant fluid which circulates in a closed loop in the air conditioning circuit.
  • the compressor 1 is also provided with a mounting member 2 on a vehicle element, and more specifically on a propulsion engine of the vehicle equipped with the air conditioning circuit.
  • the compressor 1 is provided with an intake duct 3 inside a casing 4 of the refrigerant circulating in the air conditioning circuit.
  • the compressor 1 is axially extended along a longitudinal axis referenced A and is equipped at a first end, said proximal, a compression device 5 of the refrigerant, and carried by the housing 4.
  • the axial extension direction A housing also forms an axis of rotation of an electric motor 10 housed in the housing 4 of the compressor 1.
  • the electric motor 10 is controlled by a control device 11, which may for example incorporate an inverter and one or more electronic cards .
  • the control device 11 is fixed to the housing 4 at a second axial end of the compressor 1, said distal end, opposite the first end relative to the electric motor 10.
  • such a control device could be fixed on a radial wall of the housing 4 of the compressor 1.
  • the compression device 5 implements a pair of spirals 6, 7.
  • the spirals 6, 7 are housed in a compression chamber 8 formed inside a lid 9 attached axially to the housing 4.
  • the lid 9 is carrying the fixed spiral 6 and a movable spiral 7 is orbited by means of an eccentric drive member 30 driven by the electric motor 10.
  • the eccentric drive member 30 extends axially outwardly of the casing 4, at the proximal end of the compressor 1 illustrated in FIGS. Figures 1 to 3 . It can thus be considered that the fixed part of the compression device 5 is formed by the pair formed by the cover 9 and the fixed spiral 6, these two elements being for example one-piece and forming a single piece.
  • the housing 4 comprises at this proximal end an end wall 12 through which the eccentric drive member 30 emerges from the housing 4.
  • the end wall 12 is an integral part of the housing 4 and closes the latter, to the exception of the passage 14 for the eccentric drive member 30 and passages 19 which will be detailed below.
  • This end wall 12 delimits a plane transverse to the axis A on which the compression device bears.
  • the eccentric drive member 30 passes axially through the passage 14 formed through the end wall 12 of the housing 4 and also passes through a friction plate 16 axially attached to one face of the end wall 12.
  • This plate 16 is otherwise called friction plate because it forms the part on which arises and orbiting the mobile spiral 7.
  • This friction plate takes the form of a disk provided with several openings or passages of coolant, in particular.
  • the friction plate 16 and the fixed spiral 6 are positioned by two centralizers passing through the friction plate 16 through passages 41.
  • Equidistant holes 17 around the passage 14 are centralizer receiving locations which block the rotation of the orbiting spiral. 7 when it is rotated by the electric motor 10 and its eccentric drive means 30.
  • the friction plate 16 is disposed in axial interposition between the end wall 12 of the housing 4 and the compression chamber 8, in particular between the end wall 12 and the moving coil 7.
  • the friction plate 16 is made of a steel high carbon and chromium, allowing to be quenched then calibrated in thickness, and finally polished to resist wear and have a low friction surface on which rests the mobile spiral 7.
  • a yoke 31 is mounted at the first end of the compressor 1, coming to cover the compression device 5.
  • the yoke 31 is then connected to the housing 4 at a joint plane.
  • a sealing member 20, in particular a metal seal, is placed at this joint plane, so as to ensure a seal between the yoke 31 and the housing 4.
  • the yoke 31 also comprises a discharge duct 34 through which the refrigerant fluid compressed by the compression device 5 is expelled to the air conditioning circuit.
  • the friction plate 16 has first passages 18 of the refrigerant fluid therethrough placed opposite second passages 19 of the refrigerant fluid formed through the end wall 12 of the casing 4.
  • the refrigerant fluid can thus flow between an internal volume of the housing 4 and the compression chamber 8 through the fluid passages 18, 19, under the effect of suction of the refrigerant generated by the relative mobility of the spirals 6, 7 l one with respect to the other.
  • the sealing member 20 is interposed between the housing 4 and the yoke 31 to prevent refrigerant leakage from the compressor 1.
  • the sealing member 20 is arranged in a generally flat ring 21, of which an inner edge 21 'is placed in abutment against an outer edge 16' of the friction plate 16.
  • the inner edge 21 ' for example formed by a slice of the ring 21, is placed at least partially in direct contact with the outer edge 16 ', formed for example by the outer edge of the friction plate 16.
  • a thickness of the sealing member 20 measured along the longitudinal axis A is less than or equal to a thickness of the friction 16, measured along the same axis.
  • the sealing member 20 is arranged axially so that at least a first plane, in which the ring 21 fits, passes through a second plane where the friction plate 16 fits. These two components can therefore be slightly offset axially, as long as at least one plane perpendicular to the axis A passes through these two components. According to a complementary solution, the thickness of the sealing member 20 can be entirely inscribed in the thickness of the friction plate 16. In one or other of the examples presented above, it is ensured that the sealing member 20 is in physical contact with the friction plate 16, so as to ensure the centering of the sealing member 20.
  • the sealing member 20 is centered with respect to the casing 4 by means of the friction plate 16, with the advantage of limiting the radial size of the casing 4.
  • the friction plate 16 thus ensures a perfect centering of the casing. sealing member 20, so that it is ideally placed to ensure a seal between the yoke 31 and the housing 4.
  • the yoke 31 is fixed to the housing 4 by fasteners 22 extending axially through the yoke 31 and the end wall 12, the latter delimiting the end portion of the housing 4.
  • These fasteners 22 are for example formed by screws which run along an outer wall of a body of the fixed spiral 6 by passing into cavities 35 formed at the outer periphery of the body of the fixed spiral 6.
  • These fastening members 22 are distributed around the fixed spiral 6 and tangent the cavities 35.
  • the fixed spiral 6 is positioned and centered on the casing 4, in particular by means of centralizers which extend from the fixed spiral to the casing 4 and which pass through the passages 41.
  • the bosses usually formed to receive centering pins can be eliminated, and thus reduces the radial dimension of the compressor 1. Moreover, the absence of these bosses and centering pins which is housed therein allows space to be freed radially for positioning bosses 23 more easily through from which fasteners pass.
  • the sealing member 20 preferably incorporates at least one bead 24 formed at at least one of its axial faces. Such a bead 24 reinforces the sealing member 20 in its general plane and form a deformable zone, called compression zone, through which the sealing member 20 is placed in compression between the housing 4 and the cylinder head 31.
  • the friction plate 16 has first clearances 25 which allow one or more fasteners 22 to pass through.
  • the ring 21 of the sealing member 20 has second clearances 26 for the passage of at least one fixing member 22.
  • the number of first clearances 25 may be equal to the number of second clearances 26
  • the angular distribution of the first and second clearances may be identical, so that a first clearance 25 is always facing a second clearance 26, as long as the sealing member 20 is paired with the housing 4.
  • the first clearances 25 of the friction plate 16 and the second clearances 26 of the sealing member 20 are open opposite one another. Such an arrangement makes it possible to intelligently enlarge a passage between the sealing member 20 and the friction plate 16, without impairing their basic function.
  • the sealing member 20 also comprises at least one positioning pin 32 whose function is to match the angular positioning of the sealing member 20 with respect to the friction plate 16.
  • the sealing member 20 comprises three positioning pins 32 distributed angularly and issuing from the inner edge 21 '.
  • the friction plate 16 comprises at least one positioning wall 33 located on the edge of the plate which defines a first clearance 25.
  • This positioning wall 23 cooperates with a positioning pin 32 to ensure the good angular positioning of the sealing member 20 vis-a-vis the friction plate 16.
  • the locating pin 32 - positioning wall 33 thus forms a polarizer which imposes the angular positioning of the sealing member 20 with respect to the friction plate 16.
  • This cooperation can also form a polarizer which requires the mounting of the sealing member 20 in the required direction, for example to require that a top of the bead 24 is in support against the bolt 31.
  • cells or spaces 27 are thus defined between the first clearances 25 and the second clearances 26 facing one on the other and formed respectively on the friction plate 16 and the ring 21 of the sealing member 20.
  • cells 27 form passages for the fasteners 22 which assemble the yoke 31 4.
  • the friction plate 16 comprises in its general plane at least one wing, and advantageously a plurality of radially extended wings 28 between which is formed at least a first clearance 25.
  • the inner edge 21 'of the ring 21 bears against the outer edge 16 'of the friction plate 16 which extends along the flanges 28, that is to say between two first immediately adjacent clearances.
  • the centering of the sealing member 20 on the housing 4 is thus provided by the direct contact of the inner edge of the ring 21 against the outer edge of the flanges 28, on an angular sector referenced ⁇ or ⁇ 1 .
  • the passages 18 formed through the friction plate 16 for the circulation of the refrigerant between the housing 4 and the compression chamber 8 are formed through the wings 28.
  • the angle ⁇ is greater than the angle ⁇ 1 , where ⁇ is equal to 45 ° +/- 10 ° and ⁇ 1 is equal to 20 ° +/- 10 °.
  • Figure (c) of the figure 4 illustrates the contact between the friction plate 16 and the sealing member 20, for the centering of the latter. This contact is made along at least two separate bearing lines 36, 37. These bearing lines 36 and 37 are distinct in this meaning that they are separated from each other by at least one peripheral zone devoid of contact between the sealing member 20 and the friction plate 16.
  • a first bearing line 36 is separated from a second bearing line 37 by an angular sector ⁇ 2 at least equal to 180 °, but preferably less than 210 °.
  • ⁇ 2 at least equal to 180 °, but preferably less than 210 °.
  • the friction plate 16 and the sealing member 20 have, in addition to the first support line 36 and the second support line 37, a third support line 38, a fourth support line 39 and a fifth support line. 40.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Compressor (AREA)

Abstract

Compresseur (1) à spirales (6, 7) comprenant un dispositif de compression (5) d'un fluide réfrigérant monté sur un boîtier (4) et couvert par une culasse (31), le dispositif de compression (5) mettant en oeuvre au moins une spirale fixe (6) et une spirale mobile (7) en appui contre une plaque de frottement (16) interposée entre le boîtier (4) et le dispositif de compression (5), dans lequel un organe d'étanchéité (20) est interposé entre le boîtier (4) et la culasse (31), caractérisé en que l'organe d'étanchéité (20) est centré sur le boîtier (4) par mise en appui d'un bord intérieur (21') de l'organe d'étanchéité (20) contre un bord extérieur (16') de la plaque de frottement (16).Compressor (1) with spirals (6, 7) comprising a device (5) for compressing a refrigerant fluid mounted on a housing (4) and covered by a cylinder head (31), the compression device (5) implementing at least one fixed spiral (6) and a movable spiral (7) bearing against a friction plate (16) interposed between the housing (4) and the compression device (5), wherein a sealing member (20) ) is interposed between the housing (4) and the yoke (31), characterized in that the sealing member (20) is centered on the housing (4) by pressing an inner edge (21 ') of the sealing member (20) against an outer edge (16 ') of the friction plate (16).

Description

La présente invention relève du domaine des compresseurs à spirales équipant les systèmes de climatisation pour véhicules automobiles.The present invention relates to the field of scroll compressors equipping air conditioning systems for motor vehicles.

Les véhicules automobiles sont couramment équipés d'une installation de ventilation, de chauffage et/ou de climatisation. Une telle installation est notamment dédiée au traitement de l'air envoyé dans l'habitacle du véhicule, pour son chauffage ou son refroidissement en fonction du confort souhaité par les passagers.Motor vehicles are commonly equipped with a ventilation, heating and / or air conditioning system. Such an installation is particularly dedicated to the treatment of the air sent into the cabin of the vehicle for its heating or cooling according to the comfort desired by the passengers.

A cet effet, l'installation coopère typiquement avec un circuit fermé de climatisation à travers lequel circule un fluide réfrigérant. Successivement suivant le sens de circulation du fluide à son travers, le circuit de climatisation comprend essentiellement un compresseur, un condenseur, un détendeur et un évaporateur. Le fluide est comprimé en phase gazeuse par le compresseur, transformé en phase liquide dans le condenseur, détendu à basse pression par le détendeur puis transformé en phase gazeuse dans l'évaporateur et à nouveau acheminé vers le compresseur.For this purpose, the installation typically cooperates with a closed air conditioning circuit through which circulates a refrigerant fluid. Successively following the flow direction of the fluid through it, the air conditioning circuit essentially comprises a compressor, a condenser, a pressure reducer and an evaporator. The fluid is compressed in the gas phase by the compressor, converted into a liquid phase in the condenser, expanded at low pressure by the expander and then converted into a gas phase in the evaporator and again conveyed to the compressor.

Il est plus spécifiquement connu d'exploiter un compresseur à spirales pour équiper le circuit fermé de climatisation. Un tel compresseur à spirales comprend un dispositif de compression du fluide mettant en oeuvre un couple de spirales emboîtées l'une dans l'autre. L'une des spirales est fixe tandis que l'autre spirale est radialement orbitante pour comprimer le fluide réfrigérant entre elles.It is more specifically known to operate a scroll compressor to equip the closed circuit air conditioning. Such a scroll compressor comprises a fluid compression device employing a pair of spirals nested one inside the other. One of the spirals is fixed while the other spiral is radially orbitant to compress the refrigerant fluid between them.

Selon le document WO2015060038 (VALEO JAPAN CO LTD), les spirales sont logées dans une chambre de compression ménagée à l'intérieur d'un couvercle assemblé à un boîtier. La spirale fixe est solidaire du boîtier et la spirale mobile est entraînée par un moteur logé dans le boîtier. La spirale mobile prend axialement appui en frottement glissant contre une plaque interposée entre le boîtier et la chambre de compression.According to the document WO2015060038 (VALEO JAPAN CO LTD), the spirals are housed in a compression chamber formed inside a lid assembled to a housing. The fixed spiral is secured to the housing and the moving coil is driven by a motor housed in the housing. The movable spiral axially bears in sliding friction against a plate interposed between the housing and the compression chamber.

Le fluide à l'état gazeux est entraîné par aspiration à l'intérieur du boîtier depuis le circuit de climatisation, par suite de la mobilité relative entre les spirales. Le fluide est alors comprimé entre les spirales et est refoulé hors de la chambre de compression vers le circuit de climatisation.The gaseous fluid is sucked into the housing from the air conditioning circuit as a result of relative mobility between the scrolls. The fluid is then compressed between the spirals and is forced out of the compression chamber to the air conditioning circuit.

Dans ce contexte, il convient d'assurer une étanchéité entre le circuit de climatisation et l'environnement extérieur du compresseur. Un organe d'étanchéité peut alors être disposé entre le couvercle et le boîtier.In this context, it is necessary to ensure a seal between the air conditioning circuit and the external environment of the compressor. A sealing member may then be disposed between the cover and the housing.

Il se pose dès lors le problème du positionnement relatif et de l'assemblage entre eux des divers composants du compresseur. Un tel problème est rendu délicat à résoudre en raison du nombre important des composants du compresseur, de l'extension principalement longitudinale du compresseur et de l'encombrement maximum dans lequel le compresseur peut être installé. En ce qui concerne ce dernier point, il faut noter que cet encombrement est souhaité le plus faible possible par le constructeur du véhicule.There is therefore the problem of the relative positioning and the assembly between them of the various components of the compressor. Such a problem is difficult to solve because of the large number of compressor components, the mainly longitudinal extension of the compressor and the maximum space in which the compressor can be installed. Regarding this last point, it should be noted that this size is desired as low as possible by the vehicle manufacturer.

Il doit aussi être pris en compte une limitation des coûts de production et/ou de maintenance dans un secteur industriel soumis à une concurrence économique notoirement sévère. Par suite, il est souhaitable de simplifier les opérations d'assemblage entre eux des composants d'un équipement automobile.It must also be taken into account a limitation of production and / or maintenance costs in an industrial sector subject to notoriously severe economic competition. As a result, it is desirable to simplify assembly operations between them of the components of a motor vehicle.

Traditionnellement, les composants du compresseur à spirales sont centrés les uns par rapport aux autres par des pions de centrage et sont assemblés entre eux par des vis. Ces pions de centrage génèrent la présence de bossages qui s'étendent radialement vers l'extérieur du compresseur. Ces bossages impactent directement l'encombrement du compresseur car ils peuvent venir en interférence avec une forme de l'équipement destiné à accueillir le compresseur. Ces pions de centrage ne peuvent pas être rapprochés du centre du compresseur car l'espace disponible est limité par la présence d'autres partie ou composants du compresseur.Traditionally, the components of the scroll compressor are centered relative to each other by centering pins and are interconnected by screws. These centering pins generate the presence of bosses that extend radially outwardly of the compressor. These bosses directly impact the size of the compressor because they can interfere with a form of equipment to accommodate the compressor. These centering pins can not be brought closer to the center of the compressor because the available space is limited by the presence of other parts or components of the compressor.

Dans ce contexte, il est jugé opportun de réduire au mieux l'encombrement hors tout du compresseur, notamment suivant sa dimension radiale, pour faciliter son implantation sur le véhicule dans un environnement encombré et généralement imposé par le constructeur du véhicule.In this context, it is considered appropriate to reduce at best the overall size of the compressor, including its radial dimension, to facilitate its implementation on the vehicle in a congested environment and generally imposed by the vehicle manufacturer.

L'objet de l'invention est donc un compresseur à spirales comprenant un dispositif de compression d'un fluide réfrigérant monté sur un boîtier et couvert par une culasse, le dispositif de compression mettant en oeuvre au moins une spirale fixe et une spirale mobile en appui contre une plaque de frottement interposée entre le boîtier et le dispositif de compression, dans lequel un organe d'étanchéité est interposé entre le boîtier et la culasse, caractérisé en que l'organe d'étanchéité est centré sur le boîtier par mise en appui d'un bord intérieur de l'organe d'étanchéité contre un bord extérieur de la plaque de frottement.The object of the invention is therefore a scroll compressor comprising a device for compressing a refrigerant fluid mounted on a housing and covered by a cylinder head, the compression device implementing at least one fixed spiral and a movable spiral. bearing against a friction plate interposed between the housing and the compression device, wherein a sealing member is interposed between the housing and the cylinder head, characterized in that the sealing member is centered on the housing by placing in support an inner edge of the sealing member against an outer edge of the friction plate.

L'organe d'étanchéité permet d'interdire une échappée du fluide réfrigérant entre la culasse et le boîtier dans leur zone de prise d'appui l'une contre l'autre. Une telle prise d'appui est notamment une prise d'appui axiale de la culasse contre le boîtier.The sealing member makes it possible to prevent an escape of the refrigerant fluid between the cylinder head and the housing in their bearing zone against each other. Such support is in particular an axial support of the cylinder head against the housing.

Plus particulièrement, un pourtour extérieur d'un anneau constitutif de l'organe d'étanchéité épouse avantageusement seulement en partie un pourtour extérieur de la plaque de frottement sur laquelle frotte la spirale mobile du dispositif de compression.More particularly, an outer periphery of a ring constituting the sealing member advantageously only partially surrounds an outer periphery of the friction plate on which the moving spiral of the compression device rubs.

La conformation globale en anneau de l'organe d'étanchéité n'implique pas une conformation totalement circulaire de son bord extérieur et/ou de son bord intérieur, tel qu'avantageusement visé plus loin. De même, l'agencement plat de l'anneau, notamment en forme de disque, est à apprécier dans sa globalité, des reliefs axialement étendu pouvant être ménagés en tout ou partie sur une face de l'anneau.The overall ring conformation of the sealing member does not imply a totally circular conformation of its outer edge and / or its inner edge, as advantageously referred to later. Similarly, the flat arrangement of the ring, in particular disc-shaped, is to appreciate in its entirety, axially extended reliefs may be formed in whole or part on one side of the ring.

Le compresseur selon l'invention comprend avantageusement au moins une des caractéristiques suivantes prise seule ou en combinaison :

  • l'organe d'étanchéité forme un anneau à la périphérie intérieure duquel est ménagé au moins un ergot de positionnement agencé pour définir une position angulaire déterminée de l'organe d'étanchéité par rapport à la plaque de frottement,
  • la plaque de frottement comprend au moins une paroi de positionnement localisée sur une tranche extérieure de la plaque de frottement et contre laquelle l'ergot de positionnement vient en appui pour définir la position angulaire déterminée de l'organe d'étanchéité par rapport à la plaque de frottement,
  • la plaque de frottement comprend au moins une aile qui s'étend radialement, notamment dans un plan général d'extension de la plaque de frottement, le bord intérieur de l'organe d'étanchéité prenant appui contre le bord extérieur délimitant l'aile. Une pluralité d'ailes ménagent des portées de mise en appui de l'organe d'étanchéité au moins en partie contre la tranche extérieure de la plaque de frottement, pour son centrage sur le boîtier,
  • au moins un premier passage de fluide réfrigérant est ménagé à travers l'aile,
  • la mise en appui du bord intérieur de l'organe d'étanchéité contre le bord extérieur de la plaque de frottement est opérée le long d'au moins deux lignes d'appui distinctes,
  • une première ligne d'appui est séparée d'une deuxième ligne d'appui par un secteur angulaire au moins égal à 180°,
  • les spirales sont emboîtées l'une dans l'autre et délimitent une chambre de compression ménagée à l'intérieur d'un couvercle porteur de la spirale fixe et fixé au boîtier par des organes de fixation. La chambre de compression est également délimitée par la plaque de frottement,
  • le couvercle contribue à maintenir la spirale fixe contre la plaque de frottement,
  • le compresseur peut comprendre un moteur électrique logé dans le boîtier et agencé pour faire orbiter la spirale mobile,
  • la spirale mobile frotte contre la plaque de frottement pendant son orbitation,
  • la plaque de frottement et l'organe d'étanchéité sont organisés sous forme de disque,
  • l'organe d'étanchéité est pourvu d'au moins un bourrelet ménagé sur l'une quelconque au moins de ses faces axiales. Un tel bourrelet, notamment circulaire, permet de rigidifier l'anneau dans son plan général et de former une zone de compression de l'organe d'étanchéité entre le boîtier et le couvercle et ainsi assurer plusieurs lignes de contact sur les deux faces à étanchéifier. Le bourrelet s'étend en saillie axiale par rapport au plan général d'extension de l'organe d'étanchéité. Selon un mode de réalisation, le bourrelet est susceptible de s'étendre le long du périmètre de l'anneau,
  • l'organe d'étanchéité comprend au moins un premier dégagement au travers duquel passe au moins un organe de fixation de la culasse sur le boîtier,
  • la plaque de frottement comprend au moins un deuxième dégagement au travers duquel passe au moins un organe de fixation de la culasse sur le boîtier,
  • le premier dégagement et le deuxième dégagement sont en regard l'un de l'autre, en ménageant entre eux une alvéole de passage d'au moins un organe de fixation. Les alvéoles sont avantageusement ménagées périphériquement entre deux ailes adjacentes, pour autoriser le passage des premiers organes de fixation dans un espace radial situé entre le bord intérieur de l'anneau de l'organe d'étanchéité et les bords de la plaque de frottement s'étendant entre deux ailes.
The compressor according to the invention advantageously comprises at least one of the following characteristics taken alone or in combination:
  • the sealing member forms a ring at the inner periphery of which is provided at least one positioning pin arranged to define a determined angular position of the sealing member relative to the friction plate,
  • the friction plate comprises at least one positioning wall located on an outer edge of the friction plate and against which the positioning pin bears in order to define the determined angular position of the sealing member with respect to the plate friction,
  • the friction plate comprises at least one wing which extends radially, in particular in a general plane of extension of the friction plate, the inner edge of the sealing member bearing against the outer edge delimiting the wing. A plurality of wings provide bearing surfaces of the sealing member at least partly against the outer edge of the friction plate, for its centering on the housing,
  • at least a first refrigerant passage is formed through the wing,
  • the bearing of the inner edge of the sealing member against the outer edge of the friction plate is operated along at least two distinct bearing lines,
  • a first support line is separated from a second support line by an angular sector at least equal to 180 °,
  • the spirals are nested one inside the other and delimit a compression chamber formed inside a cover carrying the fixed spiral and fixed to the housing by fasteners. The compression chamber is also delimited by the friction plate,
  • the lid helps to keep the spiral fixed against the friction plate,
  • the compressor may comprise an electric motor housed in the housing and arranged to orbit the mobile spiral,
  • the mobile spiral rubs against the friction plate during its orbiting,
  • the friction plate and the sealing member are organized in the form of a disc,
  • the sealing member is provided with at least one bead provided on at least one of its axial faces. Such a bead, in particular circular, makes it possible to stiffen the ring in its general plane and to form a zone of compression of the sealing member between the housing and the cover and thus to ensure several lines of contact on both sides to be sealed. . The bead extends in axial projection with respect to the general plane of extension of the sealing member. According to one embodiment, the bead is likely to extend along the perimeter of the ring,
  • the sealing member comprises at least a first clearance through which passes at least one fastener of the cylinder head on the housing,
  • the friction plate comprises at least a second clearance through which passes at least one fastener of the cylinder head on the housing,
  • the first clearance and the second clearance are facing each other, leaving between them a passage cell of at least one fastener. The cells are advantageously formed peripherally between two adjacent wings, to allow the passage of the first fasteners in a radial space located between the inner edge of the ring of the sealing member and the edges of the friction plate s' extending between two wings.

Le but essentiellement visé par la présente invention est de limiter au mieux l'encombrement radial hors tout du compresseur et cela en simplifiant les modalités d'assemblage entre eux des composants du compresseur. L'encombrement radial du compresseur est au mieux restreint pour favoriser son installation aisée dans un environnement encombré et imposé du véhicule.The purpose of the present invention is to limit at best the overall radial size of the compressor and this by simplifying the assembly of compressor components between them. The radial size of the compressor is at best restricted to facilitate its easy installation in a congested and imposed environment of the vehicle.

D'autres caractéristiques, détails et avantages de la présente invention ressortiront plus clairement à la lecture de la description donnée ci-après à titre indicatif, en relation avec les différents exemples de réalisation de l'invention illustrés sur les figures suivantes des planches annexées :

  • la figure 1 est une vue en coupe axiale d'une partie d'un compresseur selon la présente invention,
  • la figure 2 est une vue en perspective assemblé de la partie de compresseur de la figure 1,
  • la figure 3 est une vue en perspective éclatée de la partie de compresseur illustrée sur la figure 1,
  • la figure 4 est composée de trois schémas (a), (b) et (c), illustrant, suivant leur plan général, un organe d'étanchéité sur le schéma (a) et une plaque sur le schéma (b). Le schéma (c) illustre en position assemblée l'organe d'étanchéité et la plaque respectivement représentés sur le schéma (a) et le schéma (b).
Other characteristics, details and advantages of the present invention will emerge more clearly on reading the description given below as an indication, in relation to the various embodiments of the invention illustrated in the following figures of the attached plates:
  • the figure 1 is an axial sectional view of a portion of a compressor according to the present invention,
  • the figure 2 is an assembled perspective view of the compressor part of the figure 1 ,
  • the figure 3 is an exploded perspective view of the compressor part shown on the figure 1 ,
  • the figure 4 is composed of three diagrams (a), (b) and (c), illustrating, according to their general plan, a sealing member in the diagram (a) and a plate in the diagram (b). Diagram (c) illustrates in the assembled position the sealing member and the plate respectively shown in diagram (a) and diagram (b).

Il faut tout d'abord noter que les figures exposent la présente invention de manière détaillée et selon des modalités particulières de sa mise en oeuvre. Lesdites figures peuvent bien entendu servir le cas échéant à mieux définir la présente invention, tant dans ses particularités que dans sa généralité. Les figures et/ou leur description peuvent bien entendu être exploitées pour préciser la présente invention.It should first be noted that the figures show the present invention in detail and in particular ways of its implementation. Said figures can of course be used, if necessary, to better define the present invention, both in its particularities and in its generality. The figures and / or their description can of course be used to clarify the present invention.

Par ailleurs, pour clarifier et rendre aisée la lecture de la description qui va être faite de la présente invention, les organes communs représentés sur les différentes figures sont respectivement identifiés dans les descriptions propres à ces figures avec les mêmes numéros et/ou lettres de référence, sans nécessairement impliquer une forme de réalisation et/ou un agencement identique.Moreover, to clarify and make it easy to read the description that will be made of the present invention, the common organs shown in the various figures are respectively identified in the descriptions of these figures with the same numbers and / or letters of reference , without necessarily involving an embodiment and / or an identical arrangement.

On relèvera que la direction principale d'extension du compresseur 1 est typiquement identifiée suivant son extension axiale illustré par le trait interrompu A sur les figures 1 à 3. On notera dès à présent la notion d'extension radiale comparée à la notion d'extension axiale, la première définissant des directions transversales et notamment perpendiculaires à l'axe A. Enfin, la notion d'intérieur ou d'extérieur est définie au regard d'une direction radiale, une surface orientée vers ou faisant face à l'axe A étant qualifiée d'intérieure tandis qu'une surface orientée vers ou faisant face au milieu environnant le compresseur est qualifiée d'extérieure.It will be noted that the main direction of extension of the compressor 1 is typically identified according to its axial extension illustrated by the broken line A on the Figures 1 to 3 . We will note now the notion of radial extension compared to the notion of axial extension, the first defining transverse directions and in particular perpendicular to the axis A. Finally, the notion of interior or exterior is defined by in a radial direction, a surface oriented towards or facing the axis A being described as interior while a surface oriented towards or facing the environment surrounding the compressor is described as external.

Sur les figures 1 à 3, un compresseur 1 à spirales est illustré pour équiper un circuit de climatisation d'un véhicule automobile. Le compresseur 1 est ici représenté de manière partielle puisque seul l'une de ses extrémités axiales est illustrée. Un tel compresseur 1 est prévu pour être implanté dans ce circuit de climatisation de manière à augmenter la pression d'un fluide réfrigérant qui circule en boucle fermée dans le circuit de climatisation. Le compresseur 1 est également pourvu d'un organe de montage 2 sur un élément du véhicule, et plus spécifiquement sur un moteur de propulsion du véhicule équipé du circuit de climatisation.On the Figures 1 to 3 , a scroll compressor 1 is illustrated for equipping an air conditioning circuit of a motor vehicle. The compressor 1 is here partially represented since only one of its axial ends is illustrated. Such a compressor 1 is intended to be implanted in this air conditioning circuit so as to increase the pressure of a refrigerant fluid which circulates in a closed loop in the air conditioning circuit. The compressor 1 is also provided with a mounting member 2 on a vehicle element, and more specifically on a propulsion engine of the vehicle equipped with the air conditioning circuit.

Le compresseur 1 est muni d'un conduit d'admission 3 à l'intérieur d'un boîtier 4 du fluide réfrigérant circulant dans le circuit de climatisation. Le compresseur 1 est axialement étendu le long d'un axe longitudinal référencé A et est équipé à une première extrémité, dite proximale, d'un dispositif de compression 5 du fluide réfrigérant, et porté par le boîtier 4. La direction axiale d'extension A du boîtier forme également un axe de rotation d'un moteur électrique 10 logé dans le boîtier 4 du compresseur 1. Le moteur électrique 10 est commandé par un dispositif de commande 11, qui peut par exemple incorporer un onduleur et une ou plusieurs cartes électroniques. Selon le mode de réalisation illustré sur les figures 1 à 3, le dispositif de commande 11 est fixé au boîtier 4 à une deuxième extrémité axiale du compresseur 1, dite extrémité distale, opposée à la première extrémité par rapport au moteur électrique 10. Alternativement, un tel dispositif de commande pourrait être fixé sur une paroi radiale du boîtier 4 du compresseur 1.The compressor 1 is provided with an intake duct 3 inside a casing 4 of the refrigerant circulating in the air conditioning circuit. The compressor 1 is axially extended along a longitudinal axis referenced A and is equipped at a first end, said proximal, a compression device 5 of the refrigerant, and carried by the housing 4. The axial extension direction A housing also forms an axis of rotation of an electric motor 10 housed in the housing 4 of the compressor 1. The electric motor 10 is controlled by a control device 11, which may for example incorporate an inverter and one or more electronic cards . According to the mode of illustrated achievement on Figures 1 to 3 , the control device 11 is fixed to the housing 4 at a second axial end of the compressor 1, said distal end, opposite the first end relative to the electric motor 10. Alternatively, such a control device could be fixed on a radial wall of the housing 4 of the compressor 1.

Sur la figure 1, le dispositif de compression 5 met en oeuvre un couple de spirales 6, 7. Les spirales 6, 7 sont logées dans une chambre de compression 8 ménagée à l'intérieur d'un couvercle 9 rapporté axialement sur le boîtier 4. Le couvercle 9 est porteur de la spirale fixe 6 et une spirale mobile 7 est mise en orbitation par le biais d'un organe d'entraînement excentrique 30 mû par le moteur électrique 10. Dans ce contexte, l'organe d'entraînement excentrique 30 s'étend axialement vers l'extérieur du boîtier 4, à l'extrémité proximale du compresseur 1 illustrée sur les figures 1 à 3. On peut ainsi considérer que la partie fixe du dispositif de compression 5 est formé par le couple formé par le couvercle 9 et la spirale fixe 6, ces deux éléments étant par exemple monobloc et formant une unique pièce.On the figure 1 , the compression device 5 implements a pair of spirals 6, 7. The spirals 6, 7 are housed in a compression chamber 8 formed inside a lid 9 attached axially to the housing 4. The lid 9 is carrying the fixed spiral 6 and a movable spiral 7 is orbited by means of an eccentric drive member 30 driven by the electric motor 10. In this context, the eccentric drive member 30 extends axially outwardly of the casing 4, at the proximal end of the compressor 1 illustrated in FIGS. Figures 1 to 3 . It can thus be considered that the fixed part of the compression device 5 is formed by the pair formed by the cover 9 and the fixed spiral 6, these two elements being for example one-piece and forming a single piece.

Plus particulièrement visible sur la figure 1, le boîtier 4 comporte à cette extrémité proximale une paroi de bout 12 à travers laquelle l'organe d'entraînement excentrique 30 émerge hors du boîtier 4. La paroi de bout 12 fait partie intégrante du boîtier 4 et ferme ce dernier, à l'exception du passage 14 pour l'organe d'entraînement excentrique 30 et de passages 19 qui seront détaillés ci-après. Cette paroi de bout 12 délimite un plan transversal à l'axe A sur lequel le dispositif de compression prend appui. L'organe d'entraînement excentrique 30 traverse axialement le passage 14 ménagé à travers la paroi de bout 12 du boîtier 4 et passe également à travers une plaque de frottement 16 rapportée axialement contre une face de la paroi de bout 12. Cette plaque 16 est autrement appelée plaque de frottement car elle forme la pièce sur laquelle se pose et orbite la spirale mobile 7. Cette plaque de frottement prend la forme d'un disque pourvu de plusieurs ouvertures ou passages de fluide réfrigérant, notamment.More particularly visible on the figure 1 , the housing 4 comprises at this proximal end an end wall 12 through which the eccentric drive member 30 emerges from the housing 4. The end wall 12 is an integral part of the housing 4 and closes the latter, to the exception of the passage 14 for the eccentric drive member 30 and passages 19 which will be detailed below. This end wall 12 delimits a plane transverse to the axis A on which the compression device bears. The eccentric drive member 30 passes axially through the passage 14 formed through the end wall 12 of the housing 4 and also passes through a friction plate 16 axially attached to one face of the end wall 12. This plate 16 is otherwise called friction plate because it forms the part on which arises and orbiting the mobile spiral 7. This friction plate takes the form of a disk provided with several openings or passages of coolant, in particular.

La plaque de frottement 16 ainsi que la spirale fixe 6 sont positionnée par deux centreurs traversant la plaque de frottement 16 par des passages 41. Des trous 17 équidistant autour du passage 14 sont des emplacements de réception de centreurs qui bloquent la rotation de la spirale orbitante 7 lorsqu'elle est entrainée en rotation par le moteur électrique 10 et son moyen d'entraînement excentrique 30.The friction plate 16 and the fixed spiral 6 are positioned by two centralizers passing through the friction plate 16 through passages 41. Equidistant holes 17 around the passage 14 are centralizer receiving locations which block the rotation of the orbiting spiral. 7 when it is rotated by the electric motor 10 and its eccentric drive means 30.

La plaque de frottement 16 est disposée en interposition axiale entre la paroi de bout 12 du boîtier 4 et la chambre de compression 8, en particulier entre la paroi de bout 12 et la spirale mobile 7. La plaque de frottement 16 est fabriquée en un acier à fort taux de carbone et de chrome, permettant d'être trempée puis calibrée en épaisseur, et enfin polis pour résister à l'usure et présenter une surface à faible coefficient de frottement, sur laquelle repose la spirale mobile 7.The friction plate 16 is disposed in axial interposition between the end wall 12 of the housing 4 and the compression chamber 8, in particular between the end wall 12 and the moving coil 7. The friction plate 16 is made of a steel high carbon and chromium, allowing to be quenched then calibrated in thickness, and finally polished to resist wear and have a low friction surface on which rests the mobile spiral 7.

Une culasse 31 est montée au niveau de la première extrémité du compresseur 1, en venant couvrir le dispositif de compression 5. La culasse 31 est alors reliée au boîtier 4 au niveau d'un plan de joint. Un organe d'étanchéité 20, notamment un joint métallique, est placé au niveau de ce plan de joint, de manière à assurer une étanchéité entre la culasse 31 et le boîtier 4. La culasse 31 comprend aussi un conduit d'évacuation 34 par lequel le fluide réfrigérant compressé par le dispositif de compression 5 est expulsé vers le circuit de climatisation.A yoke 31 is mounted at the first end of the compressor 1, coming to cover the compression device 5. The yoke 31 is then connected to the housing 4 at a joint plane. A sealing member 20, in particular a metal seal, is placed at this joint plane, so as to ensure a seal between the yoke 31 and the housing 4. The yoke 31 also comprises a discharge duct 34 through which the refrigerant fluid compressed by the compression device 5 is expelled to the air conditioning circuit.

En se reportant à la figure 3, on constate que la plaque de frottement 16 comporte des premiers passages 18 du fluide réfrigérant à son travers, placés en vis-à-vis de deuxièmes passages 19 du fluide réfrigérant ménagés à travers la paroi de bout 12 du boîtier 4. Le fluide réfrigérant peut ainsi circuler entre un volume interne du boîtier 4 et la chambre de compression 8 à travers les passages de fluide 18, 19, sous l'effet d'une aspiration du fluide réfrigérant générée par la mise en mobilité relative des spirales 6, 7 l'une par rapport à l'autre.Referring to the figure 3 it is found that the friction plate 16 has first passages 18 of the refrigerant fluid therethrough placed opposite second passages 19 of the refrigerant fluid formed through the end wall 12 of the casing 4. The refrigerant fluid can thus flow between an internal volume of the housing 4 and the compression chamber 8 through the fluid passages 18, 19, under the effect of suction of the refrigerant generated by the relative mobility of the spirals 6, 7 l one with respect to the other.

Selon l'invention, l'organe d'étanchéité 20 est interposé entre le boîtier 4 et la culasse 31 pour interdire une fuite de fluide réfrigérant hors du compresseur 1. L'organe d'étanchéité 20 est agencé en anneau 21 globalement plat, dont un bord intérieur 21' est placé en appui contre un bord extérieur 16' de la plaque de frottement 16. Le bord intérieur 21', par exemple formé par une tranche de l'anneau 21, est placée au moins en partie en contact direct avec le bord extérieur 16', formé par exemple par la tranche extérieure de la plaque de frottement 16. Une épaisseur de l'organe d'étanchéité 20 mesurée le long de l'axe longitudinal A est inférieur ou égal à une épaisseur de la plaque de frottement 16, mesurée selon le même axe.According to the invention, the sealing member 20 is interposed between the housing 4 and the yoke 31 to prevent refrigerant leakage from the compressor 1. The sealing member 20 is arranged in a generally flat ring 21, of which an inner edge 21 'is placed in abutment against an outer edge 16' of the friction plate 16. The inner edge 21 ', for example formed by a slice of the ring 21, is placed at least partially in direct contact with the outer edge 16 ', formed for example by the outer edge of the friction plate 16. A thickness of the sealing member 20 measured along the longitudinal axis A is less than or equal to a thickness of the friction 16, measured along the same axis.

L'organe d'étanchéité 20 est disposé axialement de sorte qu'au moins un premier plan, dans lequel s'inscrit l'anneau 21, passe par un deuxième plan où s'inscrit la plaque de frottement 16. Ces deux composants peuvent donc être légèrement décalés axialement, tant qu'au moins un plan perpendiculaire à l'axe A passe par ces deux composants. Selon une solution complémentaire, l'épaisseur de l'organe d'étanchéité 20 peut s'inscrire entièrement dans l'épaisseur de la plaque de frottement 16. Dans l'un ou l'autre des exemples présentés ci-dessus, on garantit que l'organe d'étanchéité 20 est bien en contact physique avec la plaque de frottement 16, de manière à assurer le centrage de l'organe d'étanchéité 20.The sealing member 20 is arranged axially so that at least a first plane, in which the ring 21 fits, passes through a second plane where the friction plate 16 fits. These two components can therefore be slightly offset axially, as long as at least one plane perpendicular to the axis A passes through these two components. According to a complementary solution, the thickness of the sealing member 20 can be entirely inscribed in the thickness of the friction plate 16. In one or other of the examples presented above, it is ensured that the sealing member 20 is in physical contact with the friction plate 16, so as to ensure the centering of the sealing member 20.

L'organe d'étanchéité 20 est centré par rapport au boîtier 4 par l'intermédiaire de la plaque de frottement 16, avec pour avantage de limiter l'encombrement radial du boîtier 4. La plaque de frottement 16 assure ainsi un parfait centrage de l'organe d'étanchéité 20, pour que celui-ci soit idéalement placé en vue d'assurer une étanchéité entre la culasse 31 et le boîtier 4.The sealing member 20 is centered with respect to the casing 4 by means of the friction plate 16, with the advantage of limiting the radial size of the casing 4. The friction plate 16 thus ensures a perfect centering of the casing. sealing member 20, so that it is ideally placed to ensure a seal between the yoke 31 and the housing 4.

Selon un mode de réalisation, la culasse 31 est fixé au boîtier 4 par des organes de fixation 22 s'étendant axialement à travers la culasse 31 et la paroi de bout 12, cette dernière délimitant la partie terminale du boîtier 4. Ces organes de fixations 22 sont par exemple formés par des vis qui longent une paroi extérieure d'un corps de la spirale fixe 6 en passant dans des cavités 35 ménagées à la périphérie extérieure du corps de la spirale fixe 6. Ces organes de fixations 22 sont répartis autour de la spirale fixe 6 et tangentent les cavités 35. La spirale fixe 6 est positionnée et centré sur le boîtier 4, notamment au moyen de centreurs qui s'étendent depuis la spirale fixe jusqu'au boîtier 4 et qui traversent les passages 41.According to one embodiment, the yoke 31 is fixed to the housing 4 by fasteners 22 extending axially through the yoke 31 and the end wall 12, the latter delimiting the end portion of the housing 4. These fasteners 22 are for example formed by screws which run along an outer wall of a body of the fixed spiral 6 by passing into cavities 35 formed at the outer periphery of the body of the fixed spiral 6. These fastening members 22 are distributed around the fixed spiral 6 and tangent the cavities 35. The fixed spiral 6 is positioned and centered on the casing 4, in particular by means of centralizers which extend from the fixed spiral to the casing 4 and which pass through the passages 41.

Grâce au centrage de l'organe d'étanchéité 20 par l'intermédiaire de la plaque de frottement 16, les bossages habituellement ménagés pour recevoir des pions de centrage peuvent être supprimés, et on réduit ainsi la dimension radiale du compresseur 1. Par ailleurs, l'absence de ces bossages et des pions de centrage qui s'y loge permet de libérer de l'espace radialement pour positionner plus facilement des bossages 23 au travers desquels passent des organes de fixation.Thanks to the centering of the sealing member 20 via the friction plate 16, the bosses usually formed to receive centering pins can be eliminated, and thus reduces the radial dimension of the compressor 1. Moreover, the absence of these bosses and centering pins which is housed therein allows space to be freed radially for positioning bosses 23 more easily through from which fasteners pass.

L'organe d'étanchéité 20 intègre de préférence au moins un bourrelet 24 ménagé à l'une au moins de ses faces axiales. Un tel bourrelet 24 permet de renforcer l'organe d'étanchéité 20 dans son plan général et de former une zone déformable, dite zone de compression, par l'intermédiaire de laquelle l'organe d'étanchéité 20 est placé en compression entre le boîtier 4 et la culasse 31.The sealing member 20 preferably incorporates at least one bead 24 formed at at least one of its axial faces. Such a bead 24 reinforces the sealing member 20 in its general plane and form a deformable zone, called compression zone, through which the sealing member 20 is placed in compression between the housing 4 and the cylinder head 31.

Plus particulièrement sur les schémas a) et b) de la figure 4, on constate que la plaque de frottement 16 comporte des premiers dégagements 25 qui laissent passer un ou plusieurs organes de fixation 22.More particularly, in schemes a) and b) of the figure 4 it can be seen that the friction plate 16 has first clearances 25 which allow one or more fasteners 22 to pass through.

De même, l'anneau 21 de l'organe d'étanchéité 20 comporte des deuxièmes dégagements 26 de passage d'au moins un organe de fixation 22. On notera que le nombre de premiers dégagements 25 peut être égal au nombre de deuxièmes dégagements 26. On notera encore que la répartition angulaire des premiers et deuxièmes dégagements peut être identique, de sorte qu'un premier dégagement 25 se trouve toujours face à un deuxième dégagement 26, dès lors que l'organe d'étanchéité 20 est appairé sur le boîtier 4. Considérés deux à deux, les premiers dégagements 25 de la plaque de frottement 16 et les deuxièmes dégagements 26 de l'organe d'étanchéité 20 sont ouverts en regard les uns sur les autres. Une telle disposition permet d'agrandir astucieusement un passage entre l'organe d'étanchéité 20 et la plaque de frottement 16, sans pour autant nuire à leur fonction de base.Similarly, the ring 21 of the sealing member 20 has second clearances 26 for the passage of at least one fixing member 22. It will be noted that the number of first clearances 25 may be equal to the number of second clearances 26 It will also be noted that the angular distribution of the first and second clearances may be identical, so that a first clearance 25 is always facing a second clearance 26, as long as the sealing member 20 is paired with the housing 4. Considered two by two, the first clearances 25 of the friction plate 16 and the second clearances 26 of the sealing member 20 are open opposite one another. Such an arrangement makes it possible to intelligently enlarge a passage between the sealing member 20 and the friction plate 16, without impairing their basic function.

L'organe d'étanchéité 20 comprend par ailleurs au moins un ergot de positionnement 32 dont la fonction est d'appairer le positionnement angulaire de l'organe d'étanchéité 20 par rapport à la plaque de frottement 16. Dans le cas d'espèce, l'organe d'étanchéité 20 comprend trois ergots de positionnement 32 répartis angulairement et issus du bord intérieur 21'.The sealing member 20 also comprises at least one positioning pin 32 whose function is to match the angular positioning of the sealing member 20 with respect to the friction plate 16. In this case , the sealing member 20 comprises three positioning pins 32 distributed angularly and issuing from the inner edge 21 '.

La plaque de frottement 16 comprend au moins une paroi de positionnement 33 localisée sur la tranche de la plaque qui délimite un premier dégagement 25. Cette paroi de positionnement 23 coopère avec un ergot de positionnement 32 pour assurer le bon positionnement angulaire de l'organe d'étanchéité 20 vis-à-vis de la plaque de frottement 16. La coopération ergot de positionnement 32 - paroi de positionnement 33 forme ainsi un détrompeur qui impose le positionnement angulaire de l'organe d'étanchéité 20 vis-à-vis de la plaque de frottement 16. Cette coopération peut également former un détrompeur qui impose le montage de l'organe d'étanchéité 20 dans le sens requis, par exemple pour imposer qu'un sommet du bourrelet 24 soit en appui contre la culasse 31.The friction plate 16 comprises at least one positioning wall 33 located on the edge of the plate which defines a first clearance 25. This positioning wall 23 cooperates with a positioning pin 32 to ensure the good angular positioning of the sealing member 20 vis-a-vis the friction plate 16. The locating pin 32 - positioning wall 33 thus forms a polarizer which imposes the angular positioning of the sealing member 20 with respect to the friction plate 16. This cooperation can also form a polarizer which requires the mounting of the sealing member 20 in the required direction, for example to require that a top of the bead 24 is in support against the bolt 31.

Sur le schéma (c) illustrant l'organe d'étanchéité 20 et la plaque de frottement 16 alignés sur un même plan, des alvéoles ou espaces 27 sont ainsi délimitées entre les premiers dégagements 25 et les deuxièmes dégagements 26 en regard l'un sur l'autre et ménagés respectivement sur la plaque de frottement 16 et sur l'anneau 21 de l'organe d'étanchéité 20. Comme évoqué plus haut, de telles alvéoles 27 forment des passages pour les organes de fixation 22 qui assemblent la culasse 31 sur le boîtier 4. Une telle configuration, en plus des avantages présentés ci-dessus, permet de préserver l'organe d'étanchéité 20 de tout risque d'arrachement consécutif à l'introduction des organes de fixation 22, lors de l'assemblage de la culasse 31 sur le corps 4.In the diagram (c) illustrating the sealing member 20 and the friction plate 16 aligned on the same plane, cells or spaces 27 are thus defined between the first clearances 25 and the second clearances 26 facing one on the other and formed respectively on the friction plate 16 and the ring 21 of the sealing member 20. As mentioned above, such cells 27 form passages for the fasteners 22 which assemble the yoke 31 4. Such a configuration, in addition to the advantages presented above, makes it possible to preserve the sealing member 20 from any risk of tearing due to the introduction of the fasteners 22, during assembly. of breech 31 on the body 4.

La plaque de frottement 16 comporte dans son plan général au moins une aile, et avantageusement une pluralité d'ailes 28 radialement étendues entre lesquelles est ménagé au moins un premier dégagement 25. Le bord intérieur 21' de l'anneau 21 prend appui contre le bord extérieur 16' de la plaque de frottement 16 qui s'étend le long des ailes 28, c'est-à-dire entre deux premiers dégagements immédiatement adjacents. Le centrage de l'organe d'étanchéité 20 sur le boîtier 4 est ainsi procuré par la mise en contact direct de la tranche intérieure de l'anneau 21 contre la tranche extérieure des ailes 28, sur un secteur angulaire référencé α ou α1. Selon un exemple de réalisation, les passages 18 ménagés à travers la plaque de frottement 16 pour la circulation du fluide réfrigérant entre le boîtier 4 et la chambre de compression 8 sont ménagés à travers les ailes 28. Selon le mode de réalisation illustré ici, l'angle α est supérieur à l'angle α1, où α est égal à 45° +/-10° et α1 est égal à 20° +/-10°.The friction plate 16 comprises in its general plane at least one wing, and advantageously a plurality of radially extended wings 28 between which is formed at least a first clearance 25. The inner edge 21 'of the ring 21 bears against the outer edge 16 'of the friction plate 16 which extends along the flanges 28, that is to say between two first immediately adjacent clearances. The centering of the sealing member 20 on the housing 4 is thus provided by the direct contact of the inner edge of the ring 21 against the outer edge of the flanges 28, on an angular sector referenced α or α 1 . According to an exemplary embodiment, the passages 18 formed through the friction plate 16 for the circulation of the refrigerant between the housing 4 and the compression chamber 8 are formed through the wings 28. According to the embodiment illustrated here, the angle α is greater than the angle α 1 , where α is equal to 45 ° +/- 10 ° and α 1 is equal to 20 ° +/- 10 °.

Le schéma (c) de la figure 4 illustre le contact entre la plaque de frottement 16 et l'organe d'étanchéité 20, pour le centrage de ce dernier. Ce contact est réalisé le long d'au moins deux lignes d'appui 36, 37 distinctes. Ces lignes d'appui 36 et 37 sont distinctes en ce sens qu'elles sont séparées l'une de l'autre par au moins une zone périphérique dépourvue de contact entre l'organe d'étanchéité 20 et la plaque de frottement 16.Figure (c) of the figure 4 illustrates the contact between the friction plate 16 and the sealing member 20, for the centering of the latter. This contact is made along at least two separate bearing lines 36, 37. These bearing lines 36 and 37 are distinct in this meaning that they are separated from each other by at least one peripheral zone devoid of contact between the sealing member 20 and the friction plate 16.

Selon un mode de réalisation, il est ménagé une première ligne d'appui 36 est séparée d'une deuxième ligne d'appui 37 par un secteur angulaire α2 au moins égal à 180°, mais avantageusement inférieur à 210°. On comprend ici qu'au moins une partie de la première ligne d'appui 36 est diamétralement opposée à une partie de la deuxième ligne d'appui 37. Selon l'exemple illustré sur le schéma c), la plaque de frottement 16 et l'organe d'étanchéité 20 présentent, en plus de la première ligne d'appui 36 et de la deuxième ligne d'appui 37, une troisième ligne d'appui 38, une quatrième ligne d'appui 39 et une cinquième ligne d'appui 40. Ces cinq zones de contact périphérique entre l'organe d'étanchéité 20 et la plaque de frottement 16 sont réparties angulairement autour de l'axe longitudinal A du compresseur 1.According to one embodiment, there is provided a first bearing line 36 is separated from a second bearing line 37 by an angular sector α 2 at least equal to 180 °, but preferably less than 210 °. Here it is understood that at least a part of the first bearing line 36 is diametrically opposed to a portion of the second bearing line 37. According to the example illustrated in diagram c), the friction plate 16 and the sealing member 20 have, in addition to the first support line 36 and the second support line 37, a third support line 38, a fourth support line 39 and a fifth support line. 40. These five peripheral contact zones between the sealing member 20 and the friction plate 16 are distributed angularly about the longitudinal axis A of the compressor 1.

Claims (15)

Compresseur (1) à spirales (6, 7) comprenant un dispositif de compression (5) d'un fluide réfrigérant monté sur un boîtier (4) et couvert par une culasse (31), le dispositif de compression (5) mettant en oeuvre au moins une spirale fixe (6) et une spirale mobile (7) en appui contre une plaque de frottement (16) interposée entre le boîtier (4) et le dispositif de compression (5), dans lequel un organe d'étanchéité (20) est interposé entre le boîtier (4) et la culasse (31), caractérisé en que l'organe d'étanchéité (20) est centré sur le boîtier (4) par mise en appui d'un bord intérieur (21') de l'organe d'étanchéité (20) contre un bord extérieur (16') de la plaque de frottement (16).Compressor (1) with spirals (6, 7) comprising a device (5) for compressing a refrigerant fluid mounted on a housing (4) and covered by a cylinder head (31), the compression device (5) implementing at least one fixed spiral (6) and a movable spiral (7) bearing against a friction plate (16) interposed between the housing (4) and the compression device (5), wherein a sealing member (20) ) is interposed between the housing (4) and the yoke (31), characterized in that the sealing member (20) is centered on the housing (4) by pressing an inner edge (21 ') of the sealing member (20) against an outer edge (16 ') of the friction plate (16). Compresseur (1) selon la revendication 1, dans lequel l'organe d'étanchéité (20) forme un anneau (21) à la périphérie intérieure duquel est ménagé au moins un ergot de positionnement (32) agencé pour définir une position angulaire déterminée de l'organe d'étanchéité (20) par rapport à la plaque de frottement (16).Compressor (1) according to claim 1, wherein the sealing member (20) forms a ring (21) at the inner periphery of which is provided at least one locating pin (32) arranged to define a predetermined angular position of the sealing member (20) with respect to the friction plate (16). Compresseur (1) selon la revendication 2, dans lequel la plaque de frottement (16) comprend au moins une paroi de positionnement (33) localisée sur une tranche extérieure de la plaque de frottement (16) et contre laquelle l'ergot de positionnement (32) vient en appui pour définir la position angulaire déterminée de l'organe d'étanchéité (20) par rapport à la plaque de frottement (16).Compressor (1) according to claim 2, wherein the friction plate (16) comprises at least one positioning wall (33) located on an outer edge of the friction plate (16) and against which the positioning pin ( 32) bears to define the determined angular position of the sealing member (20) relative to the friction plate (16). Compresseur (1) selon l'une quelconque des revendications 1 à 3, dans lequel la plaque de frottement (16) comprend au moins une aile (28) qui s'étend radialement, le bord intérieur (21') de l'organe d'étanchéité (20) prenant appui contre le bord extérieur (16') délimitant l'aile (28).Compressor (1) according to any one of claims 1 to 3, wherein the friction plate (16) comprises at least one flange (28) which extends radially, the inner edge (21 ') of the body d sealing (20) bearing against the outer edge (16 ') delimiting the wing (28). Compresseur (1) selon la revendication 4, dans lequel au moins un premier passage (18) de fluide réfrigérant est ménagé à travers l'aile (28).Compressor (1) according to claim 4, wherein at least a first passage (18) of coolant is provided through the wing (28). Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel la mise en appui du bord intérieur (21') de l'organe d'étanchéité (20) contre le bord extérieur (16') de la plaque de frottement (16) est opérée le long d'au moins deux lignes d'appui (36, 37) distinctes.Compressor (1) according to any one of the preceding claims, wherein the bearing of the inner edge (21 ') of the sealing member (20) against the outer edge (16') of the friction plate ( 16) is operated along at least two lines (36, 37). Compresseur (1) selon la revendication précédente, dans lequel une première ligne d'appui (36) est séparée d'une deuxième ligne d'appui (37) par un secteur angulaire α2 au moins égal à 180°.Compressor (1) according to the preceding claim, wherein a first bearing line (36) is separated from a second bearing line (37) by an angular sector α 2 at least equal to 180 °. Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel les spirales (6, 7) sont emboîtées l'une dans l'autre et délimitent une chambre de compression (8) ménagée à l'intérieur d'un couvercle (9) porteur de la spirale fixe (6) et fixé au boîtier (4) par des organes de fixation (22).Compressor (1) according to any one of the preceding claims, in which the spirals (6, 7) are nested one inside the other and delimit a compression chamber (8) formed inside a cover ( 9) carrying the fixed spiral (6) and fixed to the housing (4) by fasteners (22). Compresseur (1) selon l'une quelconque des revendications précédentes, comprenant un moteur électrique (10) logé dans le boîtier (4) et agencé pour faire orbiter la spirale mobile (7).Compressor (1) according to any one of the preceding claims, comprising an electric motor (10) housed in the housing (4) and arranged to orbit the mobile spiral (7). Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel la spirale mobile (7) frotte contre la plaque de frottement (16) pendant son orbitation.Compressor (1) according to any one of the preceding claims, wherein the movable scroll (7) rubs against the friction plate (16) during its orbiting. Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel la plaque de frottement (16) et l'organe d'étanchéité (20) sont organisés sous forme de disque.Compressor (1) according to any one of the preceding claims, wherein the friction plate (16) and the sealing member (20) are organized as discs. Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel l'organe d'étanchéité (20) est pourvu d'au moins un bourrelet (24) ménagé sur l'une quelconque au moins de ses faces axiales.Compressor (1) according to any one of the preceding claims, wherein the sealing member (20) is provided with at least one bead (24) provided on at least one of its axial faces. Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel l'organe d'étanchéité (20) comprend au moins un premier dégagement (25) au travers duquel passe au moins un organe de fixation (22) de la culasse (31) sur le boîtier (4).Compressor (1) according to any one of the preceding claims, wherein the sealing member (20) comprises at least a first clearance (25) through which passes at least one fastener (22) of the cylinder head ( 31) on the housing (4). Compresseur (1) selon l'une quelconque des revendications précédentes, dans lequel la plaque de frottement (16) comprend au moins un deuxième dégagement (26) au travers duquel passe au moins un organe de fixation (22) de la culasse (31) sur le boîtier (4).Compressor (1) according to any one of the preceding claims, wherein the friction plate (16) comprises at least a second clearance (26) through which passes at least one fastener (22) of the yoke (31) on the housing (4). Compresseur (1) selon les revendications 13 et 14, dans lequel le premier dégagement (25) et le premier dégagement (26) sont en regard l'un de l'autre, en ménageant entre eux une alvéole (27) de passage d'au moins un organe de fixation (22) de la culasse (31) sur le boîtier (4).Compressor (1) according to claims 13 and 14, wherein the first clearance (25) and the first clearance (26) are facing each other, leaving between them a cavity (27) passage of at least one fastener (22) of the yoke (31) on the housing (4).
EP16200303.2A 2015-12-18 2016-11-23 Scroll compressor for an air-conditioning system for a motor vehicle Not-in-force EP3181907B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1562768A FR3045738B1 (en) 2015-12-18 2015-12-18 SPIRAL COMPRESSOR FOR AN AIR CONDITIONING INSTALLATION FOR A MOTOR VEHICLE

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EP3181907A1 true EP3181907A1 (en) 2017-06-21
EP3181907B1 EP3181907B1 (en) 2018-11-07

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FR (1) FR3045738B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159780A (en) * 1986-01-06 1987-07-15 Mitsubishi Electric Corp Scroll compressor
JPH08219053A (en) * 1995-02-08 1996-08-27 Toyota Autom Loom Works Ltd Scroll type compressor
EP2012016A1 (en) * 2006-04-21 2009-01-07 Sanden Corporation Scroll-type fluid machine
WO2015060038A1 (en) 2013-10-25 2015-04-30 株式会社ヴァレオジャパン Electric scroll compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159780A (en) * 1986-01-06 1987-07-15 Mitsubishi Electric Corp Scroll compressor
JPH08219053A (en) * 1995-02-08 1996-08-27 Toyota Autom Loom Works Ltd Scroll type compressor
EP2012016A1 (en) * 2006-04-21 2009-01-07 Sanden Corporation Scroll-type fluid machine
WO2015060038A1 (en) 2013-10-25 2015-04-30 株式会社ヴァレオジャパン Electric scroll compressor

Also Published As

Publication number Publication date
EP3181907B1 (en) 2018-11-07
FR3045738B1 (en) 2018-01-26
FR3045738A1 (en) 2017-06-23

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