EP3194779B1 - Kompressionsvorrichtung und spiralverdichter mit solch einer kompressionsvorrichtung - Google Patents

Kompressionsvorrichtung und spiralverdichter mit solch einer kompressionsvorrichtung Download PDF

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Publication number
EP3194779B1
EP3194779B1 EP15756959.1A EP15756959A EP3194779B1 EP 3194779 B1 EP3194779 B1 EP 3194779B1 EP 15756959 A EP15756959 A EP 15756959A EP 3194779 B1 EP3194779 B1 EP 3194779B1
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EP
European Patent Office
Prior art keywords
compression device
scroll
spiral
thrust bearing
flat thrust
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Application number
EP15756959.1A
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English (en)
French (fr)
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EP3194779A1 (de
Inventor
Eric MONET
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Liebherr Aerospace Toulouse SAS
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Liebherr Aerospace Toulouse SAS
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    • 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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • 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
    • 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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0253—Details concerning the base
    • 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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • F04C18/0284—Details of the wrap tips
    • 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
    • F04C2230/40—Heat treatment
    • F04C2230/41—Hardening; Annealing
    • 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
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • 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
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/92—Surface treatment
    • 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
    • F04C2240/50—Bearings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/028—Magnesium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0403—Refractory metals, e.g. V, W
    • F05C2201/0412—Titanium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0436—Iron
    • F05C2201/0439—Cast iron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/10—Hardness

Definitions

  • the present invention relates to a compression device and to a scroll compressor comprising such a device.
  • the invention finds applications in the sector of the refrigeration and air conditioning industry, in particular, for refrigeration system applications such as air conditioning in vehicles.
  • a scroll compressor also known as a scroll compressor, is used to compress a gas.
  • a compression stage of a scroll compressor comprises two interposed scrolls so as to suck and compress a gas. One of the spirals is fixed while the other moves eccentrically without rotational movement.
  • a compression cycle comprises a gas suction step, then a gas compression step and finally a compressed gas delivery step.
  • the eccentric movement of one of the spirals relative to the other allows the suction of a gas from the outer part of the spirals.
  • the aspirated gas forms a pocket of gas drawn towards the center of the spirals. As the pocket moves towards the center of the spirals, it gets smaller and smaller. Thus, the gas pressure increases until the desired discharge pressure is reached. Once this pressure is reached, the gas is discharged, discharging the pocket, via a delivery orifice in the center of the spirals.
  • scroll compressors In industry, scroll compressors have different characteristics depending on their application.
  • the disadvantage of the thrust ball bearing lies in its very principle, which leads to make the axial forces transit only through points of contact between the tracks and the balls, thus limiting the level of transmissible force and the potential lifetime compared to technologies including a flat stop or a counter-stop. pressure.
  • back pressure stop compressor also makes it possible to overcome the weakness of the ball stop by replacing it with the back pressure stop.
  • back pressure force eliminates the need for spiral seals and allows very simplified lubrication management in this area. Nevertheless, the level of back pressure force induces higher losses than those of the flat stop compressor.
  • the document EP-2 312 163 discloses a scroll compressor comprising, contained in a sealed housing, an electric motor section, a compression mechanism section connected to the electric motor section, an oil sump for the lubricating oil and providing compression of refrigerant through the compression mechanism section.
  • the refrigerant used is a halogenated hydrocarbon or a hydrocarbon each having a carbon-carbon double bond in their composition or a mixture containing one of the halogenated hydrocarbon and the hydrocarbon.
  • a sliding surface of at least one of the two parts constituting a sliding section in which the two parts slide over each other in the sealed housing is configured so that iron-based or aluminum-based metal does not. is not exposed directly.
  • the present invention aims to eliminate, or at least mitigate, all or part of the aforementioned drawbacks of the prior art.
  • the present invention aims to provide a compression device which has great reliability while being lightweight.
  • the present invention aims to allow the use of aluminum in a compression device despite the high pressure levels used in fields such as aeronautics.
  • the object of the present invention is in particular to dispense with a complex lubrication management system without altering the reliability of the stop.
  • An aim of the invention is thus in particular to provide a solution making it possible to use lightweight materials in a compression device operating with an elasto-hydrodynamic lubrication regime using a small quantity of lubricant.
  • the present invention aims in particular to provide a compression device having a long service life.
  • the compression device according to the invention will also preferably be easy to regulate and / or compact and / or of moderate cost.
  • the proposed coatings make it possible to have high levels of hardness between the contacting surfaces of the different parts and thus to keep a differential friction torque between said contacting surfaces in order to avoid premature wear of the surfaces.
  • the various coatings allow the advantageous use of parts formed from aluminum alloy without the latter deteriorating even at high pressure levels such as encountered in aeronautical applications.
  • the coating provided on the light alloy spiral makes it possible, thanks to its hardness but also to its thickness, to avoid deformation of the alloy so that operation in an elasto-hydrodynamic lubrication regime can be envisaged, which limits the amount of lubricant required.
  • the spirals are for example made of a material chosen from all the materials containing the alloys of aluminum, magnesium and titanium.
  • the thick coating produced on the spiral and / or on the flat stopper preferably has a thickness of between 60 and 80 ⁇ m.
  • This coating is preferably an oxidation layer of the alloy obtained by a micro-arc oxidation process.
  • a preferred embodiment of this compression device provides that the flat stopper and the spiral facing this flat stopper are made of an aluminum alloy resistant to temperatures above 150 ° C.
  • Such a compression device may be such that it further comprises at least one spiral wedge bonded to one of the two spirals by means of a structural adhesive resistant to temperatures of up to 180 ° C.
  • the spiral wedge advantageously makes it possible to promote friction between the fixed spiral and the mobile spiral, thus limiting their wear. Gluing the spiral wedge to one of the two spirals advantageously improves the reliability of the compression device.
  • the fixed spiral can have a hard anodization treatment impregnated with polytetrafluoroethylene (PTFE) at least on a surface facing the mobile spiral.
  • PTFE polytetrafluoroethylene
  • the anti-rotation means may have a hard anodization treatment impregnated with PTFE at least on a surface facing the fixed spiral and / or on at least one surface facing the mobile spiral.
  • the hard anodization treatment impregnated with PTFE advantageously makes it possible to promote friction and thus to limit the wear of the various parts in contact with one another.
  • the first support and / or the second support advantageously make it possible to optimize the anti-rotation connection between the fixed spiral and the mobile spiral and the connection between the mobile spiral and the planar stopper by improving their robustness while maintaining a significant saving in mass. .
  • the present invention relates to a scroll compressor comprising a compression device as described above.
  • the figure 1 and the figure 2 illustrate the general structure of one embodiment of a compression device 1 according to the present invention.
  • the figure 3 illustrates in an exploded view the general structure of said compression device 1.
  • the compression device 1 comprises a fixed spiral 3 interposed with a movable spiral 5.
  • the means for driving the movable spiral 5 are not illustrated in the figures. However, their operation is known to those skilled in the art and is therefore not described here.
  • the compression device 1 comprises anti-rotation means and a planar stop 7.
  • the fixed spiral 3 and the mobile spiral 5 are here formed of a light alloy, with a density of less than 5 (that is to say a density of less than 5000 kgm -3 . description that it is an aluminum alloy but it could also be, for example, a magnesium or titanium alloy.
  • the fixed spiral 3 is composed of a plate 12 in the form of a disc having an internal surface 11 and an external surface 13.
  • a wall 14 in the form of a spiral having a center and an external end extends in protrudes perpendicularly to the plate 12, from the inner surface 11.
  • the movable spiral 5 is composed of a disc-shaped plate 16 having an inner surface 15 and an outer surface 17.
  • a wall 18 in the form of a spiral. a center and an outer end projecting perpendicularly to the plate 16, from the inner surface 15.
  • the fixed spiral 3 and the movable spiral 5 can be positioned opposite each other so that their respective walls are interposed into one another and that the internal surface 11 is opposite the internal surface. 15.
  • the mobile spiral 5 is in motion, relative to the fixed spiral 3. It moves eccentrically without rotating, that is to say it has a circular translational movement in a plane corresponding to that of the plates 12, 16 .
  • the fixed scroll 3 and the movable scroll 5 have several parts in contact so as to trap pockets of gas sucked from the outer ends of the spirals.
  • these gas pockets transit towards the center of the spirals while being smaller and smaller in order to thus compress the gas present in these pockets. This movement of the pockets results from the fact that the parts of the spirals which are in contact change with the eccentric movement of the mobile spiral 5.
  • the planar stopper 7 has, in this exemplary embodiment, an annular shape having a planar upper surface 19 in contact with the movable spiral 5 and more precisely the external surface 17.
  • the planar stopper 7 is formed from a light alloy, for example an aluminum alloy. It could also be a magnesium or titanium alloy or another light metal alloy (density less than 5).
  • the planar stop 7 is formed of a cast iron grade.
  • the planar stopper 7 has the function of maintaining, along a longitudinal axis A, the longitudinal position of the moving spiral 5 to prevent separation. spirals 3, 5.
  • the axial forces are taken up by the flat stopper 7 thanks to a contact between the external surface 17 of the mobile spiral 5 and an upper surface 19 of the flat stopper 7.
  • a film of oil is formed. present between these two surfaces, to limit their wear, without any specific maintenance of the latter being necessary.
  • the lubrication regime in the present application example is an elasto-hydrodynamic regime.
  • the movable spiral 5 is associated with anti-rotation means which ensure a circular translational movement without the spiral rotating around the longitudinal axis A.
  • These means comprise for example a fixed finger sliding in a rib produced at the level of the movable spiral 5.
  • the anti-rotation of the movable spiral 5 is ensured by an Oldham seal 9.
  • the Oldham seal 9 is then, as illustrated in the figures, positioned between the fixed spiral 3 and the mobile spiral 5. It has, in this exemplary embodiment, an annular shape comprising projecting tongues towards the fixed spiral 3 and towards the mobile spiral 5.
  • the fixed spiral 3 comprises grooves oriented towards the seal of Oldham 9. Each groove is adapted to receive the corresponding tongue so as to allow sliding between the Oldham seal 9 and the fixed coil 3.
  • the movable coil 5 comprises grooves oriented towards the seal. Oldham 9. Each groove is adapted to receive the corresponding tongue so as to allow sliding between the Oldham seal 9 and the movable spiral 5 while preventing the latter from having a rotational movement.
  • the Oldham seal 9 is preferably formed from the same material that the spirals, is here in an aluminum alloy.
  • the components of the compression device 1 described above include a coating.
  • the Oldham seal 9 preferably has a hard anodization treatment impregnated with Polytetrafluoroethylene (PTFE) on surfaces intended to be in contact with one or the other of the spirals.
  • PTFE Polytetrafluoroethylene
  • the fixed spiral 3 also preferably has a hard anodization treatment impregnated with PTFE on its surfaces intended to be in contact with the mobile spiral 5, that is to say on the internal surface 11 as well as on the faces of the walls 14. , 18 protruding in the form of a spiral from said fixed spiral 3.
  • the fixed spiral 3 may have, on the surfaces in contact with the Oldham seal 9, a treatment spar or a ceramic coating or other surface treatment by oxidation. anodic.
  • a hard anodization treatment makes it possible to cover the treated part with a fairly thick layer of alumina, the wear resistance and corrosion resistance of which are very good.
  • the movable spiral 5 preferably has a ceramic coating on the surface in contact with the planar stopper 7. Also, in the embodiment where the planar stopper 7 is formed from a light alloy, the latter preferably has a ceramic coating on the surface. in contact with the moving spiral 5.
  • micro-arcs appear which generate a complex and very hard oxide layer (Al 2 0 3 for an aluminum-based alloy, TiO 2 for a titanium-based alloy and MgO for a magnesium-based alloy). It is also possible to achieve thick coating layers of up to 200 ⁇ m.
  • the ceramic coating has high wear resistance, good corrosion protection and good electrical insulation. Its hardness is greater than 1100 HV. To achieve good protection of the alloy, a thickness greater than 40 ⁇ m will be chosen, preferably between 60 ⁇ m and 80 ⁇ m.
  • the movable spiral 5 may further have, on the surfaces in contact with the Oldham seal 9, a treatment spar or a ceramic coating or other surface treatment by anodic oxidation.
  • the compression device 1 can furthermore comprise a spiral seal 21 for the fixed spiral 3 and a spiral seal 23 for the movable spiral 5.
  • the spiral seals 21, 23 have the function of ensuring axial sealing. between the spirals 3, 5 to ensure that the gas pockets do not discharge before reaching the desired discharge pressure.
  • the spiral seal 21 is preferably spiral shaped so as to be positioned between one end of the wall 14 of the fixed scroll 3 and the inner surface 15 of the movable scroll 5.
  • the spiral seal 23 is. , preferably spiral shaped so as to be positioned between one end of the wall 18 of the mobile spiral 5 and the internal surface 11 of the fixed spiral 3.
  • the compression device 1 may also include a spiral wedge 25.
  • the wedge preferably has a spiral shape corresponding to the shape of the movable coil 5 so that the spiral wedge 25 can be inserted through the coil. protruding part of the mobile spiral 5.
  • the spiral wedge 25 is glued to the internal surface 15 of the movable spiral 5 by means of a high temperature structural adhesive.
  • the gluing of the wedge is made possible by the integration of countersinks on the internal surface 15 of the mobile spiral 5.
  • FIGS. 4 and 5 illustrate another embodiment of a compression device.
  • the figure 4 illustrates in an exploded view the general structure of this second form of.
  • the references used on the figures 1 to 3 are used to describe similar parts.
  • a compression device 1 further comprises a first support 27 and a second support 29 and has generally the same characteristics as in the embodiment described in relation to the figures 1 to 3 .
  • the first support 27 is here positioned between the fixed spiral 3 and the Oldham seal 9. It may have, on the one hand, a disc 31 fixed to the outer surface 13 of the fixed spiral 3 and, on the other hand, a peripheral skirt 33 cooperating with the Oldham seal 9 in order to ensure the anti-rotation function and also to keep the Oldham seal 9 in contact with the mobile spiral 5, more precisely here with the second support 29.
  • the second support 29 receives the movable spiral 5. It may have, on the one hand, a disc 35 fixed to the outer surface 17 of the movable spiral 5 and, on the other hand, a peripheral rim 37 which cooperates with the seal. Oldham 9.
  • the second support 29 is thus coupled with the Oldham seal 9 so as to provide a connection between these two parts.
  • the second support 29 can be positioned between the movable spiral 5 and the flat stopper 7 so as to be in contact with the upper surface 19 of the flat stopper 7.
  • the first support 27 and the second support 29 are preferably formed from a shade of cast iron.
  • the disc 31 and the peripheral skirt 33 can be two parts independent of one another.
  • the peripheral skirt 33 can be divided into several connecting pieces between the fixed spiral 3 and the Oldham seal 9.
  • the disc 35 and the peripheral rim 37 can be two independent pieces from one another.
  • the peripheral rim 37 can be divided into several connecting pieces between the movable spiral 5 and the Oldham seal 9 and between the movable spiral 5 and the planar stopper 7.
  • a device thus makes it possible to effectively compress a gas. It makes it possible to obtain a better compromise between the mass of the compression device and its reliability compared to that of the compression devices of the prior art while having a good service life.
  • Such a compression device is light, reliable, easy to assemble and also has a good service life.
  • such a device does not require lubrication, therefore its maintenance cost is reduced.
  • compression devices can find applications for example in devices implementing air conditioning incorporating a scroll compressor.
  • the present invention makes it possible to obtain devices of reduced mass since it makes it possible to produce the spirals and the flat stop of the compression device from a light alloy (aluminum or other).
  • the system can do without specific lubrication and it is not necessary to provide a lubricant supply at the stop.
  • the coating obtained by micro-arc oxidation makes it possible, with light alloy parts, to operate with elasto-hydrodynamic type lubrication. This is not possible with light alloy parts coated with a thin coating layer because then the surface of the part becomes deforms significantly and seizing of the parts in contact appears. In addition, when it wears out, the particles that come off the coating are very fine and therefore do not impact the lubrication. The service life of the lubricant is therefore increased compared to the use of coatings known from the prior art.
  • the present invention is not limited to the preferred embodiment and to the variant embodiments presented above by way of non-limiting examples. It also relates to the variant embodiments within the reach of a person skilled in the art within the framework of the claims below.

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

Claims (11)

  1. Kompressionsvorrichtung, die mindestens enthält:
    - zwei Spiralen (3, 5), die ineinandergefügt und je aus einer Legierung einer Dichte geringer als 5 geformt sind, wobei eine der Spiralen, ortsfeste Spirale (3) genannt, ortsfest ist, und die andere Spirale, bewegliche Spirale (5) genannt, sich exzentrisch ohne zu drehen verschiebt,
    - Drehhemmungseinrichtungen, die aus einer Aluminiumlegierung geformt und geeignet sind, die Drehhemmung der beweglichen Spirale (5) zu erlauben, und
    - einen ebenen Anschlag (7), der geeignet ist, die bewegliche Spirale (5) axial zu halten,
    dadurch gekennzeichnet, dass die Fläche der Spirale (5), die dazu bestimmt ist, mit dem ebenen Anschlag (7) in Kontakt zu kommen, mit einer dicken Beschichtung bedeckt ist, einer Dicke zwischen 40 und 200 µm, einer Härte von mehr als 1100 HV und mehrheitlich aus einem von der Leichtmetalllegierung stammenden Oxid bestehend,
    dass der ebene Anschlag (7) aus einem Material hergestellt ist, das aus der Gesamtheit der Materialien ausgewählt wird, die die Aluminium-, Magnesium- und Titanlegierungen enthält, und
    dass die Fläche des ebenen Anschlags (7), die dazu bestimmt ist, mit der Spirale (5) in Kontakt zu sein, mit einer dicken Beschichtung bedeckt ist, einer Dicke zwischen 40 und 200 µm, einer Härte von mehr als 1100 HV und mehrheitlich aus einem von der Leichtmetalllegierung stammenden Oxid bestehend.
  2. Kompressionsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Spiralen (3, 5) aus einem Material hergestellt werden, das aus der Gesamtheit der Materialien ausgewählt wird, die die Aluminium-, Magnesium- und Titanlegierungen enthält.
  3. Kompressionsvorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die auf der Spirale (5) und/oder dem ebenen Anschlag (7) hergestellte dicke Beschichtung eine Dicke zwischen 60 und 80 µm aufweist.
  4. Kompressionsvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die auf der Spirale und/oder dem ebenen Anschlag (7) hergestellte dicke Beschichtung eine Oxidationsschicht der Legierung ist, die durch ein Mikrobogenoxidationsverfahren erhalten wird.
  5. Kompressionsvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der ebene Anschlag (7) und die diesem ebenen Anschlag (7) gegenüberliegende Spirale (5) aus einer Aluminiumlegierung hergestellt sind, die Temperaturen von mehr als 150°C standhält.
  6. Kompressionsvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sie außerdem mindestens eine Spiralscheibe (25) enthält, die an eine der zwei Spiralen (3, 5) mittels eines Strukturklebers geklebt wird, der Temperaturen bis zu 180°C standhält.
  7. Kompressionsvorrichtung nach irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die ortsfeste Spirale (5) eine Hartanodisierungsbehandlung imprägniert mit Polytetrafluorethylen (PTFE) mindestens auf einer Fläche gegenüber der beweglichen Spirale (5) besitzt.
  8. Kompressionsvorrichtung nach irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Drehhemmungseinrichtungen eine PTFE-imprägnierte Hartanodisierungsbehandlung mindestens auf einer Fläche gegenüber der ortsfesten Spirale (3) und/oder auf mindestens einer Fläche gegenüber der beweglichen Spirale (5) besitzen.
  9. Kompressionsvorrichtung nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sie außerdem mindestens einen ersten Träger (27) enthält, der aus einer Gusseisensorte geformt wird und geeignet ist, sich mit der ortsfesten Spirale (3) zu koppeln, indem eine Verbindung zwischen der ortsfesten Spirale (3) und den Drehhemmungseinrichtungen gewährleistet wird.
  10. Kompressionsvorrichtung nach irgendeinem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass sie außerdem mindestens einen zweiten Halter (29) enthält, der aus einer Gusseisensorte gebildet wird und geeignet ist, sich mit der beweglichen Spirale (5) zu koppeln, indem eine Verbindung einerseits zwischen der beweglichen Spirale (5) und den Drehhemmungseinrichtungen und andererseits zwischen der beweglichen Spirale (5) und dem ebenen Anschlag (7) gewährleistet wird.
  11. Spiralverdichter, dadurch gekennzeichnet, dass er mindestens eine Kompressionsvorrichtung (1) nach einem der Ansprüche 1 bis 10 enthält.
EP15756959.1A 2014-09-17 2015-07-01 Kompressionsvorrichtung und spiralverdichter mit solch einer kompressionsvorrichtung Active EP3194779B1 (de)

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FR1458761A FR3025842B1 (fr) 2014-09-17 2014-09-17 Dispositif de compression et compresseur a spirales utilisant un tel dispositif de compression
PCT/FR2015/051821 WO2016042218A1 (fr) 2014-09-17 2015-07-01 Dispositif de compression et compresseur à spirales utilisant un tel dispositif de compression

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WO2016042218A1 (fr) 2016-03-24
FR3025842B1 (fr) 2019-04-05
EP3194779A1 (de) 2017-07-26
ES2877561T3 (es) 2021-11-17
US20170306956A1 (en) 2017-10-26
FR3025842A1 (fr) 2016-03-18

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