EP0882893B1 - Scroll fluid displacement machine - Google Patents

Scroll fluid displacement machine Download PDF

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Publication number
EP0882893B1
EP0882893B1 EP98401316A EP98401316A EP0882893B1 EP 0882893 B1 EP0882893 B1 EP 0882893B1 EP 98401316 A EP98401316 A EP 98401316A EP 98401316 A EP98401316 A EP 98401316A EP 0882893 B1 EP0882893 B1 EP 0882893B1
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EP
European Patent Office
Prior art keywords
disc
fixed
mobile
frame
shoe
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.)
Expired - Lifetime
Application number
EP98401316A
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German (de)
French (fr)
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EP0882893A3 (en
EP0882893A2 (en
Inventor
Benoít Barthod
Jean-Pierre Chicherie
Patrick Philippe
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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Publication date
Application filed by Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP0882893A2 publication Critical patent/EP0882893A2/en
Publication of EP0882893A3 publication Critical patent/EP0882893A3/en
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Publication of EP0882893B1 publication Critical patent/EP0882893B1/en
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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
    • 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
    • F04C27/009—Shaft sealings specially adapted for pumps
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps

Definitions

  • the present invention relates to a fluid displacement machine of the Scroll type comprising a fixed disc comprising a spiral working wall and a movable disc also comprising a spiral working wall cooperating with that of the fixed disc, drive means of the disc mobile in a circular translational movement, the axial positioning of the movable disc being effected by a pad system rubbing between two stops side, one of the two bodies, shoe or side stops being integral with a fixed frame and the other of said movable disc.
  • the present invention aims to overcome these drawbacks and it has for object a machine as defined above, characterized in that the fixed disc is linked on the opposite side to the movable disc to a fixed central shaft linked to the frame, and comprising a discharge channel, said central shaft being surrounded a sealing bellows connected at one end to the frame and at its other end to a connecting flange connected, by its periphery, around the fixed disc, to the disc movable beyond its spiral wall, the movable disc and the flange forming a housing enclosing the fixed disc, the space between the bellows and said central shaft constituting a suction duct, and in that said positioning system axial of the movable disc is located outside the internal volume of said housing, said member secured to the movable disc, shoe or lateral stops being secured to said housing and projecting outwardly.
  • Figure 3 shows the machine at the end, on the side of the mobile disc having removed the casing.
  • Figure 4 is a partial sectional view along IV-IV of Figure 3, and the FIG. 5 is a partial sectional view along V-V of FIG. 4.
  • a fluid displacement machine Scroll type according to the invention.
  • Such a machine is particularly good suitable to operate as a vacuum pump but can operate as compressor or liquid fluid pump.
  • This frame contains the whole machine and in particular its active pumping parts comprising a fixed disc 2 comprising conventionally a working wall 3 in a spiral, and a movable disc 4 also comprising a spiral working wall 5 cooperating with that of the fixed disc. These two spirals, with their disc, define a volume of work 6.
  • the fixed disc 2 is linked, on the opposite side to the movable disc 4, to the frame 1 by a fixed central shaft 7.
  • This central shaft 7 is hollow and thus comprises a channel 8 constituting a discharge channel connected to a discharge outlet 9.
  • the movable disc 4 is connected by its periphery, beyond its wall in spiral 5, and around the fixed disc 2, at the periphery of a connecting flange 10.
  • This connecting flange 10, with the movable disc 4 constitutes a sealed housing enclosing the fixed disc 2.
  • the central part of the flange 10 is open and leaves pass the fixed central shaft 7. Furthermore, this central part of the flange is fixed in a sealed manner, both to an eccentric hollow axis 11 and to one end of a sealing bellows 12, the other end of which is fixed to the frame 1 at the end of the fixed central shaft 7.
  • This bellows 12 surrounds the fixed central shaft 7.
  • the space 13 between the sealing bellows 12 and the fixed central shaft 7 constitutes a suction channel connected to a suction inlet 14.
  • the eccentric hollow axis 11 journals in a bore 15 made in a rotary main shaft 16 with axis 17.
  • the bore 15 has its axis 18 offset by relative to the axis 17 of rotation of the rotary main shaft 16.
  • the rotation of the shaft main rotary 16 thus causes, associated with an anti-rotation means any, a circular translation movement, without rotation, of the axis offset 11 and attached parts: the connecting flange 10 and the disc mobile 4.
  • an Oldham 19 seal prevents rotation of the movable disc 4.
  • the rotary main shaft 16 is hollow and surrounds the sealing bellows 10. It is supported by bearings 20, 21 in the frame 1.
  • the rotary main shaft 16 is driven in rotation by an electric motor whose rotor 22 is mounted integral with the shaft 16 and is separated from the stator 23 by a tubular sealing jacket 24.
  • the movable disc 4 is axially precisely positioned by a friction shoe system 25 between two lateral stops 26, 27.
  • the shoe 25 forms a fixed circular ring linked to the frame 1 between the parts 1A and 1B and the lateral stops 26 and 27 belong respectively to the connecting flange 1 and to the movable disc 4.
  • These lateral stops 26 and 27 form two rings externally exceeding the internal volume of the mobile case constituted by the flange 10 and the movable disc 4 linked by screws 28 with interposition of a shim of thickness 29 mounted with seals 30 and 31.
  • the thickness of the shim 29 corresponds to that of the shoe 25, apart from the clearance necessary for friction between the pad 25 and the lateral stops 26 and 27.
  • Figure 2 shows a variant in which the axial positioning of the movable disc 4 by friction shoe between two stops lateral is here performed by a movable shoe 32 linked to the housing 4-10A.
  • This skate is disc-shaped washer with holes 33 for oil passage and, in on the other hand, it rubs between two fixed lateral stops, linked to the frame 1: a stop 34 and a stopper 35. Precise adjustment of the axial positioning of the disc mobile 4 is here effected by the choice of the stopper 35.
  • the stopper 34 and the stopper 35 are also disc-shaped.
  • the device for immobilizing the disc in rotation mobile 4 by Oldham gasket 19 is here located between the connecting flange 10A and the frame 1A and not, as in Figure 1, between the disc 4 and the frame 1B.
  • This new arrangement makes it possible to immediately reach mobile disk 4 without other disassembly than part 1B of the frame 1.
  • the frame is built in three parts: 1A, 1B and 1C.
  • Figures 3, 4 and 5 describe another variant relative to the axial positioning system.
  • the skate is linked to the part mobile 4-10A as in figure 2.
  • the only difference is in the shape of the skate and the constitution of the lateral stops linked to the frame 1.
  • Figure 3 is an end view of the machine, corresponding to a view on the left in Figure 2 with part 1B of the frame removed, and of course, with the shoe and side stops corresponding to the new variant.
  • the movable shoe 36 has the shape of a disc-washer having an inner circumference 37 circular, but whose outer perimeter comprises, at 90 °, four protrusions 38 forming a wiper each taken in sandwich between two lateral stops 39 and the wedge stop 40.
  • the stops lateral 39 and shim stops 40 are in the form of bars.
  • the two stops 39 and 40 are fixed to part 1A of the frame by two screws 41 with a separation between the two shims by means of two small tubes 42 crossed by the screws 41 and whose thickness corresponds, to the clearance necessary for free friction, to the thickness of the protrusions 38 of the shoe 36.
  • the precise adjustment of the axial position of the movable disc 4 is carried out by the choice of the thickness of the shim stops 40.
  • the shoe 36 is a separate piece, independent of the mobile disc 4 and connecting flange 10A. We can very well however integrate the pad into the connecting flange 10A or else into the movable disc 4.
  • the shoe is located outside the diameter of the fixed disc 2 and of the mobile disc 4, therefore over a large diameter, this facilitates the parallelism of the two discs, which is not the case for previous document cited.

Description

La présente invention concerne une machine à déplacement de fluide du type Scroll comportant un disque fixe comprenant une paroi de travail en spirale et un disque mobile comprenant également une paroi de travail en spirale coopérant avec celle du disque fixe, des moyens d'entraínement du disque mobile dans un mouvement de translation circulaire, le positionnement axial du disque mobile étant effectué par un système de patin frottant entre deux butées latérales, l'un des deux organes, patin ou butées latérales étant solidaire d'un bâti fixe et l'autre dudit disque mobile.The present invention relates to a fluid displacement machine of the Scroll type comprising a fixed disc comprising a spiral working wall and a movable disc also comprising a spiral working wall cooperating with that of the fixed disc, drive means of the disc mobile in a circular translational movement, the axial positioning of the movable disc being effected by a pad system rubbing between two stops side, one of the two bodies, shoe or side stops being integral with a fixed frame and the other of said movable disc.

Le brevet américain n° 5 167 494 décrit une telle machine, cependant, le système de positionnement axial du disque mobile, ainsi que les parties mécaniques telles que palier et interface de transformation de mouvement, ne sont pas isolées du circuit de pompage, ce qui ne permet pas l'utilisation d'une telle machine comme pompe à vide propre. Par ailleurs, le réglage de la position axiale semble difficile.U.S. Patent No. 5,167,494 describes such a machine, however, the axial positioning system of the movable disc, as well as the parts mechanical such as bearing and motion transformation interface, do not are not isolated from the pumping circuit, which does not allow the use of a such machine as clean vacuum pump. In addition, the position adjustment axial seems difficult.

La présente invention a pour but de pallier ces inconvénients et elle a pour objet une machine telle que définie ci-dessus, caractérisée en ce que le disque fixe est lié du côté opposé au disque mobile à un arbre central fixe lié au bâti, et comportant un canal de refoulement, ledit arbre central étant entouré d'un soufflet d'étanchéité relié à une extrémité au bâti et à son autre extrémité à un flasque de liaison relié, par sa périphérie, autour du disque fixe, au disque mobile au-delà de sa paroi en spirale, le disque mobile et le flasque formant un boítier enfermant le disque fixe, l'espace entre le soufflet et ledit arbre central constituant un conduit d'aspiration, et en ce que ledit système de positionnement axial du disque mobile est situé à l'extérieur du volume interne dudit boítier, ledit organe solidaire du disque mobile, patin ou butées latérales étant solidaire dudit boítier et le dépassant extérieurement.The present invention aims to overcome these drawbacks and it has for object a machine as defined above, characterized in that the fixed disc is linked on the opposite side to the movable disc to a fixed central shaft linked to the frame, and comprising a discharge channel, said central shaft being surrounded a sealing bellows connected at one end to the frame and at its other end to a connecting flange connected, by its periphery, around the fixed disc, to the disc movable beyond its spiral wall, the movable disc and the flange forming a housing enclosing the fixed disc, the space between the bellows and said central shaft constituting a suction duct, and in that said positioning system axial of the movable disc is located outside the internal volume of said housing, said member secured to the movable disc, shoe or lateral stops being secured to said housing and projecting outwardly.

On va maintenant donner la description d'un exemple de mise en oeuvre de l'invention en se reportant au dessin annexé dans lequel :

  • La figure 1 représente une machine à déplacement de fluide du type Scroll, selon l'invention, dans laquelle le patin est fixe et lié au bâti.
  • La figure 2 est une variante de la figure 1 dans laquelle le patin est mobile et lié au disque mobile, le patin et les butées latérales étant sous forme de disques-rondelles.
  • Les figures 3, 4 et 5 représentent une variante de la figure 2 dans laquelle le patin, également lié au disque mobile, a la forme d'un disque-rondelle avec quatre frotteurs en croix et les butées latérales, liées au bâti sont sous forme de barrettes.
    • We will now give the description of an example of implementation of the invention with reference to the appended drawing in which:
  • FIG. 1 represents a fluid displacement machine of the Scroll type, according to the invention, in which the shoe is fixed and linked to the frame.
  • Figure 2 is a variant of Figure 1 in which the pad is movable and connected to the movable disc, the pad and the lateral stops being in the form of disc-washers.
  • Figures 3, 4 and 5 show a variant of Figure 2 in which the shoe, also linked to the movable disc, has the shape of a disc-washer with four cross wipers and the lateral stops, linked to the frame are in the form bars.

    • Dans ces figures, la figure 3 montre la machine en bout, du côté du disque mobile en ayant ôté le carter.In these figures, Figure 3 shows the machine at the end, on the side of the mobile disc having removed the casing.

    La figure 4 est une vue partielle en coupe selon IV-IV de la figure 3, et la figure 5 est une vue partielle en coupe selon V-V de la figure 4.Figure 4 is a partial sectional view along IV-IV of Figure 3, and the FIG. 5 is a partial sectional view along V-V of FIG. 4.

    En se référant à la figure 1, on voit une machine à déplacement de fluide de type Scroll selon l'invention. Une telle machine est particulièrement bien adaptée pour fonctionner comme pompe à vide mais peut fonctionner comme compresseur ou pompe à fluide liquide.Referring to Figure 1, we see a fluid displacement machine Scroll type according to the invention. Such a machine is particularly good suitable to operate as a vacuum pump but can operate as compressor or liquid fluid pump.

    Elle comprend un bâti fixe 1 en deux parties assemblées : un corps 1A et un carter 1B. Ce bâti renferme l'ensemble de la machine et en particulier ses parties actives de pompage comprenant un disque fixe 2 comportant classiquement une paroi de travail 3 en spirale, et un disque mobile 4 comportant également une paroi de travail 5 en spirale coopérant avec celle du disque fixe. Ces deux spirales, avec leur disque, délimitent un volume de travail 6.It comprises a fixed frame 1 in two assembled parts: a body 1A and a housing 1B. This frame contains the whole machine and in particular its active pumping parts comprising a fixed disc 2 comprising conventionally a working wall 3 in a spiral, and a movable disc 4 also comprising a spiral working wall 5 cooperating with that of the fixed disc. These two spirals, with their disc, define a volume of work 6.

    Le disque fixe 2 est lié, du côté opposé au disque mobile 4, au bâti 1 par un arbre central fixe 7. Cet arbre central 7 est creux et comprend ainsi un canal 8 constituant un canal de refoulement relié à une sortie de refoulement 9.The fixed disc 2 is linked, on the opposite side to the movable disc 4, to the frame 1 by a fixed central shaft 7. This central shaft 7 is hollow and thus comprises a channel 8 constituting a discharge channel connected to a discharge outlet 9.

    Le disque mobile 4 est relié par sa périphérie, au delà de sa paroi en spirale 5, et autour du disque fixe 2, à la périphérie d'un flasque de liaison 10. Ce flasque de liaison 10, avec le disque mobile 4 constitue un boítier étanche enfermant le disque fixe 2. La partie centrale du flasque 10 est ouverte et laisse passer l'arbre central fixe 7. Par ailleurs, cette partie centrale du flasque est fixée d'une façon étanche, à la fois à un axe creux excentré 11 et à une extrémité d'un soufflet d'étanchéité 12 dont l'autre extrémité est fixée au bâti 1 à l'extrémité de l'arbre central fixe 7. Ce soufflet 12 entoure l'arbre central fixe 7.The movable disc 4 is connected by its periphery, beyond its wall in spiral 5, and around the fixed disc 2, at the periphery of a connecting flange 10. This connecting flange 10, with the movable disc 4 constitutes a sealed housing enclosing the fixed disc 2. The central part of the flange 10 is open and leaves pass the fixed central shaft 7. Furthermore, this central part of the flange is fixed in a sealed manner, both to an eccentric hollow axis 11 and to one end of a sealing bellows 12, the other end of which is fixed to the frame 1 at the end of the fixed central shaft 7. This bellows 12 surrounds the fixed central shaft 7.

    L'espace 13 entre le soufflet d'étanchéité 12 et l'arbre central fixe 7 constitue un canal d'aspiration relié à une entrée d'aspiration 14.The space 13 between the sealing bellows 12 and the fixed central shaft 7 constitutes a suction channel connected to a suction inlet 14.

    L'axe creux excentré 11 tourillonne dans un alésage 15 effectué dans un arbre principal rotatif 16 d'axe 17. L'alésage 15 a son axe 18 excentré par rapport à l'axe 17 de rotation de l'arbre principal rotatif 16. La rotation de l'arbre principal rotatif 16 provoque ainsi, associé à un moyen d'anti-rotation quelconque, un mouvement de translation circulaire, sans rotation, de l'axe excentré 11 et des pièces y attachées : le flasque de liaison 10 et le disque mobile 4.The eccentric hollow axis 11 journals in a bore 15 made in a rotary main shaft 16 with axis 17. The bore 15 has its axis 18 offset by relative to the axis 17 of rotation of the rotary main shaft 16. The rotation of the shaft main rotary 16 thus causes, associated with an anti-rotation means any, a circular translation movement, without rotation, of the axis offset 11 and attached parts: the connecting flange 10 and the disc mobile 4.

    Dans l'exemple décrit, un joint de Oldham 19 empêche toute rotation angulaire du disque mobile 4. L'arbre principal rotatif 16 est creux et entoure le soufflet d'étanchéité 10. Il est supporté par des roulements 20, 21 dans le bâti 1.In the example described, an Oldham 19 seal prevents rotation of the movable disc 4. The rotary main shaft 16 is hollow and surrounds the sealing bellows 10. It is supported by bearings 20, 21 in the frame 1.

    L'entraínement en rotation de l'arbre principal rotatif 16 est effectué par un moteur électrique dont le rotor 22 est monté solidaire de l'arbre 16 et est séparé du stator 23 par une chemise tubulaire d'étanchéité 24. Le disque mobile 4 est positionné axialement de façon précise par un système de patin 25 frottant entre deux butées latérales 26, 27. Dans l'exemple de cette figure 1, le patin 25 forme un anneau circulaire fixe lié au bâti 1 entre les parties 1A et 1B et les butées latérales 26 et 27 appartiennent respectivement au flasque de liaison 1 et au disque mobile 4. Ces butées latérales 26 et 27 forment deux anneaux dépassant extérieurement le volume interne du boítier mobile constitué par le flasque 10 et le disque mobile 4 liés par des vis 28 avec interposition d'une cale d'épaisseur 29 montée avec des joints d'étanchéité 30 et 31.The rotary main shaft 16 is driven in rotation by an electric motor whose rotor 22 is mounted integral with the shaft 16 and is separated from the stator 23 by a tubular sealing jacket 24. The movable disc 4 is axially precisely positioned by a friction shoe system 25 between two lateral stops 26, 27. In the example of this figure 1, the shoe 25 forms a fixed circular ring linked to the frame 1 between the parts 1A and 1B and the lateral stops 26 and 27 belong respectively to the connecting flange 1 and to the movable disc 4. These lateral stops 26 and 27 form two rings externally exceeding the internal volume of the mobile case constituted by the flange 10 and the movable disc 4 linked by screws 28 with interposition of a shim of thickness 29 mounted with seals 30 and 31.

    L'épaisseur de la cale 29 correspond à celle du patin 25, au jeu près nécessaire au frottement entre le patin 25 et les butées latérales 26 et 27.The thickness of the shim 29 corresponds to that of the shoe 25, apart from the clearance necessary for friction between the pad 25 and the lateral stops 26 and 27.

    Le réglage précis du positionnement axial du disque mobile 4, et donc du jeu entre disques respectifs 2 et 4 et l'extrémité des parois en spirale 3 et 5, est obtenu par le choix de la cale d'épaisseur 29 et du patin 25.The precise adjustment of the axial positioning of the movable disc 4, and therefore the clearance between respective disks 2 and 4 and the end of the spiral walls 3 and 5, is obtained by the choice of the shim 29 and the pad 25.

    Comme on le voit, l'intégralité du circuit de fluide, depuis l'aspiration 14, jusqu'au refoulement 9, est complètement isolée et étanche vis-à-vis de toutes les parties mécaniques telles que : roulements 20, 21 ; dispositif de positionnement axial à patin 25, 26, 27 situé à l'extérieur du boítier 4-10 ; et axe excentré 11 tourillonnant dans l'alésage excentré 15.As we can see, the entire fluid circuit, from suction 14, up to discharge 9, is completely insulated and sealed against all mechanical parts such as: bearings 20, 21; device axial positioning with pad 25, 26, 27 located outside the housing 4-10; and axis eccentric 11 journalling in the eccentric bore 15.

    Une telle machine convient ainsi parfaitement comme pompe à vide propre et sèche.Such a machine is therefore perfectly suited as a vacuum pump clean and dry.

    Les parties mécaniques citées ci-dessus, extérieures au circuit de fluide isolé grâce au soufflet 10 et au boítier étanche 4-10, sont lubrifiées.The mechanical parts mentioned above, outside the fluid circuit insulated thanks to the bellows 10 and the waterproof housing 4-10, are lubricated.

    La figure 2 montre une variante dans laquelle le système de positionnement axial du disque mobile 4 par patin frottant entre deux butées latérales est ici effectué par un patin mobile 32 lié au boítier 4-10A. Ce patin est en forme de disque-rondelle avec des trous 33 de passage d'huile et, en revanche, il frotte entre deux butées latérales fixes, liées au bâti 1 : une butée 34 et une cale-butée 35. Le réglage précis du positionnement axial du disque mobile 4 est ici effectué par le choix de la cale-butée 35. La butée 34 et la cale-butée 35 sont également en forme de disque.Figure 2 shows a variant in which the axial positioning of the movable disc 4 by friction shoe between two stops lateral is here performed by a movable shoe 32 linked to the housing 4-10A. This skate is disc-shaped washer with holes 33 for oil passage and, in on the other hand, it rubs between two fixed lateral stops, linked to the frame 1: a stop 34 and a stopper 35. Precise adjustment of the axial positioning of the disc mobile 4 is here effected by the choice of the stopper 35. The stopper 34 and the stopper 35 are also disc-shaped.

    Dans cette figure, le dispositif d'immobilisation en rotation du disque mobile 4 par joint d'Oldham 19 est ici situé entre le flasque liaison 10A et le bâti 1A et non pas, comme dans la figure 1, entre le disque 4 et le bâti 1B. Cette nouvelle disposition permet d'atteindre immédiatement le disque mobile 4 sans autre démontage que la partie 1B du bâti 1. Dans cette figure, le bâti est construit en trois parties : 1A, 1B et 1C.In this figure, the device for immobilizing the disc in rotation mobile 4 by Oldham gasket 19 is here located between the connecting flange 10A and the frame 1A and not, as in Figure 1, between the disc 4 and the frame 1B. This new arrangement makes it possible to immediately reach mobile disk 4 without other disassembly than part 1B of the frame 1. In this figure, the frame is built in three parts: 1A, 1B and 1C.

    Une autre modification consiste en ce que dans cette figure 2, le flasque de liaison 10A et l'axe excentré 11 sont constitués par une seule et même pièce.Another modification consists in that in this figure 2, the flange 10A connection and the offset axis 11 are formed by a single piece.

    Cette figure comporte également quelques autres modifications, mais qui sont sans importance pour la présente invention.This figure also includes some other modifications, but which are irrelevant to the present invention.

    Les figures 3, 4 et 5 décrivent une autre variante relativement au système de positionnement axial. Dans cette variante, le patin est lié à la partie mobile 4-10A comme sur la figure 2. La seule différence consiste dans la forme du patin et la constitution des butées latérales liées au bâti 1.Figures 3, 4 and 5 describe another variant relative to the axial positioning system. In this variant, the skate is linked to the part mobile 4-10A as in figure 2. The only difference is in the shape of the skate and the constitution of the lateral stops linked to the frame 1.

    La figure 3 est une vue en bout de la machine, correspondant à une vue de gauche de la figure 2 avec la partie 1B du bâti ôté, et bien entendu, avec le patin et les butées latérales correspondant à la nouvelle variante.Figure 3 is an end view of the machine, corresponding to a view on the left in Figure 2 with part 1B of the frame removed, and of course, with the shoe and side stops corresponding to the new variant.

    Dans cette variante, le patin mobile 36 a la forme d'un disque-rondelle ayant un pourtour intérieur 37 circulaire, mais dont le périmètre externe comporte, à 90°, quatre protubérances 38 formant frotteur pris chacun en sandwich entre deux butées latérales 39 et la butée-cale 40. Ici, les butées latérales 39 et les butées-cales 40 sont en forme de barrettes. Les deux butées 39 et 40 sont fixées à la partie 1A du bâti par deux vis 41 avec une séparation entre les deux cales par le moyen de deux petits tubes 42 traversés par les vis 41 et dont l'épaisseur correspond, au jeu près nécessaire au frottement libre, à l'épaisseur des protubérances 38 du patin 36.In this variant, the movable shoe 36 has the shape of a disc-washer having an inner circumference 37 circular, but whose outer perimeter comprises, at 90 °, four protrusions 38 forming a wiper each taken in sandwich between two lateral stops 39 and the wedge stop 40. Here, the stops lateral 39 and shim stops 40 are in the form of bars. The two stops 39 and 40 are fixed to part 1A of the frame by two screws 41 with a separation between the two shims by means of two small tubes 42 crossed by the screws 41 and whose thickness corresponds, to the clearance necessary for free friction, to the thickness of the protrusions 38 of the shoe 36.

    Ici, le réglage précis de la position axiale du disque mobile 4 est effectué par le choix de l'épaisseur des butées-cales 40.Here, the precise adjustment of the axial position of the movable disc 4 is carried out by the choice of the thickness of the shim stops 40.

    Sur la figure 3, dans la partie inférieure, les butées latérales 39 et les butées-cales 40 n'ont pas été représentées permettant de bien voir deux protéburances 38 du patin 36.In FIG. 3, in the lower part, the lateral stops 39 and the shims 40 have not been shown allowing two to be clearly seen skid pads 38 of pad 36.

    Dans la figure 4, le patin 36 est une pièce distincte, indépendante du disque mobile 4 et du flasque de liaison 10A. On peut très bien cependant intégrer le patin au flasque de liaison 10A ou bien au disque mobile 4. In FIG. 4, the shoe 36 is a separate piece, independent of the mobile disc 4 and connecting flange 10A. We can very well however integrate the pad into the connecting flange 10A or else into the movable disc 4.

    Dans la machine selon l'invention, le patin est situé à l'extérieur du diamètre du disque fixe 2 et du disque mobile 4, donc sur un grand diamètre, ceci facilite le parallélisme des deux disques, ce qui n'est pas le cas du document antérieur cité.In the machine according to the invention, the shoe is located outside the diameter of the fixed disc 2 and of the mobile disc 4, therefore over a large diameter, this facilitates the parallelism of the two discs, which is not the case for previous document cited.

    Claims (1)

    1. Scroll type fluid displacement machine including a fixed disc (2) comprising a spiral working wall (3), a mobile disc (4) also comprising a spiral working wall (5) cooperating with that of the fixed disc and means (11, 16, 22, 23) for driving circular translation movement of the mobile disc, the mobile disc being positioned axially by a system including a shoe (25, 32, 36) rubbing between two lateral abutments (26, 27-34, 35-39, 40), one member of the pair of members comprising the shoe or the lateral abutments being attached to a fixed frame (1) and the other member of this pair of members being fastened to said mobile disc (4), characterized in that the fixed disc (2) is joined on the side opposite the mobile disc (4) to a fixed central shaft (7) joined to the frame (1) and including a discharge passage (8), said central shaft (7) being surrounded by a sealing bellows (12) connected at one end to the frame and at its other end to a connecting flange (10, 10A) the periphery of which, around the fixed disc (2), is joined to the mobile disc (4) beyond its spiral wall (5), the mobile disc (4) and the flange (10, 10A) forming a casing enclosing the fixed disc (2), the space (13) between the bellows (12) and said central shaft (7) constituting a suction passage, and in that said mobile disc axial positioning system is external of the internal volume of said casing (4-10, 10A), said member attached to the mobile disc, shoe or lateral abutments, being attached to said casing and projecting externally of it.
    EP98401316A 1997-06-05 1998-06-02 Scroll fluid displacement machine Expired - Lifetime EP0882893B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9706966A FR2764346B1 (en) 1997-06-05 1997-06-05 SCROLL TYPE FLUID MOVING MACHINE
    FR9706966 1997-06-05

    Publications (3)

    Publication Number Publication Date
    EP0882893A2 EP0882893A2 (en) 1998-12-09
    EP0882893A3 EP0882893A3 (en) 1999-02-24
    EP0882893B1 true EP0882893B1 (en) 2003-04-23

    Family

    ID=9507642

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98401316A Expired - Lifetime EP0882893B1 (en) 1997-06-05 1998-06-02 Scroll fluid displacement machine

    Country Status (5)

    Country Link
    US (1) US6050793A (en)
    EP (1) EP0882893B1 (en)
    JP (1) JP4160161B2 (en)
    DE (1) DE69813672T2 (en)
    FR (1) FR2764346B1 (en)

    Families Citing this family (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10031142B4 (en) * 2000-06-27 2006-09-07 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Scroll compressor and use of a scroll compressor
    DE10031141B4 (en) * 2000-06-27 2006-06-29 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH spiral body
    US8622724B2 (en) * 2009-09-25 2014-01-07 Agilent Technologies, Inc. Scroll pump with isolation barrier
    US9404491B2 (en) * 2013-03-13 2016-08-02 Agilent Technologies, Inc. Scroll pump having bellows providing angular synchronization and back-up system for bellows
    US9328730B2 (en) 2013-04-05 2016-05-03 Agilent Technologies, Inc. Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
    US9366255B2 (en) 2013-12-02 2016-06-14 Agilent Technologies, Inc. Scroll vacuum pump having external axial adjustment mechanism
    FR3044348B1 (en) * 2016-06-17 2017-11-24 Somega Du Centre VOLUMETRIC PUMP, IN PARTICULAR A PISTON OR A SCREW WITH EXCELLENT MOTION COMPRISING A RIGOROUS SEALING DEVICE
    GB2595283B (en) * 2020-05-21 2022-11-02 Edwards Ltd Scroll pump

    Family Cites Families (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR1210922A (en) * 1958-09-12 1960-03-11 Alsacienne Constr Meca Capsulism device for regulators, compressors or the like
    FR2141402B1 (en) * 1971-06-01 1973-06-29 Vulliez Paul
    FR2153129B2 (en) * 1971-06-01 1974-01-04 Vulliez Paul
    US4383805A (en) * 1980-11-03 1983-05-17 The Trane Company Gas compressor of the scroll type having delayed suction closing capacity modulation
    US4677949A (en) * 1985-08-19 1987-07-07 Youtie Robert K Scroll type fluid displacement apparatus
    US5167494A (en) * 1989-01-31 1992-12-01 Nippon Soken Inc. Scroll type compressor with axially supported movable scroll
    US5354184A (en) * 1992-02-20 1994-10-11 Arthur D. Little, Inc. Windage loss reduction arrangement for scroll fluid device
    JPH074366A (en) * 1993-06-17 1995-01-10 Zexel Corp Scroll compressor

    Also Published As

    Publication number Publication date
    US6050793A (en) 2000-04-18
    JP4160161B2 (en) 2008-10-01
    DE69813672D1 (en) 2003-05-28
    DE69813672T2 (en) 2004-03-04
    FR2764346A1 (en) 1998-12-11
    EP0882893A3 (en) 1999-02-24
    EP0882893A2 (en) 1998-12-09
    FR2764346B1 (en) 1999-07-30
    JPH1150980A (en) 1999-02-23

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