EP1876356A1 - Machine a fluide avec volute - Google Patents

Machine a fluide avec volute Download PDF

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Publication number
EP1876356A1
EP1876356A1 EP06731149A EP06731149A EP1876356A1 EP 1876356 A1 EP1876356 A1 EP 1876356A1 EP 06731149 A EP06731149 A EP 06731149A EP 06731149 A EP06731149 A EP 06731149A EP 1876356 A1 EP1876356 A1 EP 1876356A1
Authority
EP
European Patent Office
Prior art keywords
scroll
wall
fluid machine
chip seal
end plate
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
EP06731149A
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German (de)
English (en)
Other versions
EP1876356B1 (fr
EP1876356A4 (fr
Inventor
Yuji c/o Sanden Corporation TAKEI
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Sanden Corp
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Sanden Corp
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Filing date
Publication date
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Publication of EP1876356A1 publication Critical patent/EP1876356A1/fr
Publication of EP1876356A4 publication Critical patent/EP1876356A4/fr
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Publication of EP1876356B1 publication Critical patent/EP1876356B1/fr
Expired - Fee Related 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/02—Rotary-piston machines or engines 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
    • F01C1/0207—Rotary-piston machines or engines 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
    • F01C1/0215—Rotary-piston machines or engines 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C11/00—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type
    • F01C11/002—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle
    • F01C11/004—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle and of complementary function, e.g. internal combustion engine with supercharger
    • 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
    • F04C27/001—Radial sealings for working fluid
    • 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
    • F04C27/005—Axial sealings for working fluid
    • 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
    • F04C23/001—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 of similar working principle
    • F04C23/003—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 of similar working principle having complementary function

Definitions

  • the present invention relates to a scroll fluid machine, and specifically, to a scroll fluid machine improved in durability of scroll unit.
  • a scroll fluid machine used as a fluid machine in a refrigeration circuit of an air conditioning system for vehicles has a scroll unit, and the scroll unit includes a fixed scroll and a movable scroll.
  • Each of these fixed scroll and movable scroll has an end plate and a scroll wall integral with the end plate, and the scrolls are disposed at a condition where both scroll walls are engaged with each other so that therebetween a gas-tight pressure chamber (fluid pocket) is formed via a chip seal on the tip of the scroll wall.
  • Patent document 1 JP-A-8-261171
  • a fine gap may be secured between both scroll walls within a range which does not decrease the sealability of the pressure chamber, and the scroll walls may be in non-sliding contact with each other.
  • the processing accuracy and the assembly accuracy of not only the fixed scroll and the movable scroll but also the orbital unit have to be increased.
  • an object of the present invention is to provide a scroll fluid machine which can relax the sliding contact condition between scroll walls by a simple structure while maintaining a good sealability of a pressure chamber, thereby having an excellent durability.
  • a scroll fluid machine has a scroll unit that comprises a fixed scroll and a movable scroll each constructed from an end plate and a scroll wall integral with the end plate, and comprises a chip seal provided at a tip of a scroll wall of one of the scrolls and in relative sliding contact with an end plate of the other scroll, and is characterized in that the scroll unit further comprises a radial projection provided on a first wall surface as one of wall surfaces of the scroll walls facing each other and being in relative sliding contact with a second wall surface as the other wall surface to secure a fine gap between the wall surfaces when a pressure chamber (fluid pocket) is formed between the fixed scroll and the movable scroll.
  • the above-described radial projection may be formed separately from the chip seal, it is preferred that the radial projection is formed integrally with the chip seal.
  • the chip seal includes a top seal surface which is in relative sliding contact with the end plate of the other scroll, and a sliding contact surface which is connected perpendicularly to a side edge of the top seal surface and which is positioned relatively to the first wall surface with a distance corresponding to the fine gap.
  • the above-described scroll unit may further comprise a holding means for holding the chip seal at the tip of the scroll wall.
  • This holding means may comprise a recessed portion and a projected portion which are provided on the chip seal and the scroll wall and which are engaged with each other.
  • the holding means may comprise an adhesive layer.
  • the material for the chip seal is not particularly limited, preferably it is made of one material selected from the group consisting of a polyphenylenesulfide group resin, a polyetheretherketone group resin and a polyimide group resin.
  • the scroll fluid machine can be formed as a compressor or an expander, and further, as a scroll fluid machine having both functions of compression and expansion.
  • it can be structured as a scroll fluid machine wherein a motor is further provided, and the scroll unit is provided on each end of a rotational shaft of the motor.
  • the radial projection secures a fine gap between the wall surfaces of both scroll walls, the sliding contact condition between the scroll walls can be relaxed while the sealability of the pressure chamber can be maintained, and abrasion of the scroll walls can be suppressed. Further, in this fluid machine, by the structure in which the radial projection secures a fine gap between the wall surfaces of the scroll walls, even if the movable scroll is operated at a high-speed orbital movement, the orbital posture of the movable scroll is not disturbed, and occurrence of a galling between the scroll walls can be prevented. Consequently, the fluid machine according to the present invention has an excellent durability.
  • the structure in which a fine gap is secured between the scroll walls it is not necessary to mix a lubricant oil in the operational fluid, and the structure is preferable for making the machine oil-free. Therefore, for example, in a refrigeration circuit applied with this fluid machine, because it is not necessary to mix a lubricant oil in the refrigerant, the coefficient of performance of the refrigeration circuit is improved. Moreover, because it is not necessary to mix a lubricant oil in the operational fluid, this fluid machine can be applied to various uses.
  • the radial projection is formed integrally with the chip seal, because the number of parts does not increase, reduction in productivity and cost up can be prevented. Further, by the structure in which the radial projection is formed integrally with the chip seal, because a fine gap can be easily secured even at a position which is most apart from an end portion of a drive shaft supporting the movable scroll, even when the movable scroll is operated at a high-speed orbital movement, disturbance of the orbital posture of the movable scroll can be surely prevented.
  • both surfaces can well exhibit respective target functions. Further, in this case, because the chip seal has the top seal surface projecting from the tip of the scroll wall, during the operation, the surface contact pressure between the chip seal and the end plate may be reduced appropriately, and the durability of the chip seal may be increased.
  • the holding means includes a recessed portion and a projected portion which are provided on the chip seal and the scroll wall and which are engaged with each other, the radial projection can be held on the scroll wall side more easily and more securely.
  • the holding means includes an adhesive layer, the radial projection can be held on the scroll wall side further easily and further securely.
  • the chip seal is made of one material selected from the group consisting of a polyphenylenesulfide group resin (PPS group resin), a polyetheretherketone group resin (PEEK group resin) and a polyimide group resin (PI group resin) which are excellent in abrasion resistance, the durability of the scroll fluid machine can be further increased.
  • PPS group resin polyphenylenesulfide group resin
  • PEEK group resin polyetheretherketone group resin
  • PI group resin polyimide group resin
  • the scroll fluid machine according to the present invention is formed as a structure wherein a motor is further provided, and the scroll unit is provided on each end of a rotational shaft of this motor (namely, a structure having two pressure chambers), it is possible to use one pressure chamber as a chamber for compression and use the other pressure chamber as a chamber for expansion.
  • the expansion energy of an operational fluid in the expansion chamber can be used as an auxiliary power for compressing an operational fluid in the compression chamber, the consumption power may be saved.
  • Fig. 1 depicts a scroll fluid machine 1 according to an embodiment of the present invention, which is applied, for example, to a refrigeration circuit of an air conditioning system for vehicles.
  • the refrigeration circuit has a circulation passageway 2, and refrigerant as the operational fluid is circulated in the circulation passageway 2.
  • a lubricant oil is not mixed in the refrigerant, and this refrigeration circuit is oil free.
  • fluid machine 1 has both functions of a compressor and an expander, and the fluid machine disposed in circulation passageway 2 divides the circulation passageway 2 into a high-pressure region 2a and a low-pressure region 2b.
  • a condenser 4 and a receiver 6 are disposed in order in the circulation direction of refrigerant, and in low-pressure region 2b, an evaporator 8 is interposed.
  • Fluid machine 1 has a motor housing 10, and the motor housing 10 has a motor casing 12 with a cup-like shape and an end plate 14 fixed to the opening end of the motor casing 12.
  • a cylindrical stator 16 is fitted into a circumferential wall 12a of casing 12, and stator 16 surrounds a columnar rotor 18 free to rotate.
  • a drive shaft 20 extends through the center of rotor 18, and the rotor 18 rotates integrally with drive shaft 20.
  • Shaft holes are provided on the central parts of end wall 12b of casing 12 and end plate 14, respectively, and both end portions of drive shaft 20 are projected from these shaft holes.
  • Drive shaft 20 is supported free to rotate by end wall 12b and end plate 14 via ball bearings 22 provided in the shaft holes. Further, in the shaft holes, lip seals 24 are provided at positions outside ball bearings 22, and the shaft holes are closed by the lip seals 24.
  • a power supply port 26 is provided to circumferential wall 12a of motor casing 12, and power can be supplied to stator 16 from an external power source (not shown) through power supply port 26.
  • an external power source not shown
  • rotor is rotated by the electromagnetic force of stator 16, thereby rotating drive shaft 20.
  • a compression housing is provided to each end of the above-described motor housing 10, and the compression housing has a cup-like compression casing 30.
  • Compression casing 30 is fixed to motor housing 10 by a plurality of bolts 32, and the opening end of compression casing 30 is fitted at a gas-tight condition to each end of motor housing 10 via O-ring 34.
  • a scroll unit 35 is provided in compression casing 30, and scroll unit 35 has metal fixed scroll 36 and movable scroll 38.
  • These fixed scroll 36 and movable scroll 38 have end plates 36a, 38a and scroll walls 36b, 38b integral with end plates 36a, 38a, and in this fluid machine 1, the end wall of compression casing 30 is formed also as end plate 36a of fixed scroll 36.
  • Resin chip seals 42 are provided on the tips of scroll walls 36b, 38b, respectively, and scroll walls 36b, 38b of fixed scroll 36 and movable scroll 38 are in sliding contact with end plates 36a, 38a of scrolls 36, 38 positioned at the respective counter sides, via chip seals 42.
  • chip seal 42 will be explained, and because the structures of chip seals 42 provided on fixed scroll 36 and movable scroll 38, and fixing means of chip seals 42 to scroll walls 36b, 38b, are same as each other, the explanation will be carried out by exemplifying chip seal 42 of movable scroll 38 side.
  • chip seal 42 extends spirally, and has constant width and thickness. From the back surface among both flat surfaces parallel to each other which define the thickness of chip seal 42, pins 42a are projected at predetermined positions in the lengthwise direction (spiral direction).
  • the region connected to the outer wall surface among both wall surfaces of scroll wall 38b is formed as a flat surface 46 at a position close to end plate 38a as compared with tip surface 44 connected to the inner wall surface.
  • Flat surface 46 also extends spirally, and pin holes 46a are formed at predetermined positions in the lengthwise direction.
  • chip seal 42 is overlapped with flat surface 46, and at that time, pins 42a are inserted into pin holes 46a. Therefore, as shown in Fig. 4, by the fitting of pins 42a into pin holes 46a, chip seal 42 is fixed to the tip of scroll wall 38b.
  • a part of chip seal 42 is projected at a predetermined length from tip surface 44 of scroll wall 38b in the thickness direction of chip seal 42, and the front surface of chip seal 42 is parallel to the tip surface 44 of scroll wall 38b, but is positioned near end plate 36a of fixed scroll 36 as compared with the tip surface 44. Therefore, the front surface of chip seal 42 forms a seal surface 42b which is in sliding contact with end plate 36a of fixed scroll 36, over its entire region.
  • a part of chip seal 42 is projected at a predetermined length from the outer wall surface of scroll wall 38b in the width direction of chip seal 42 (the radial direction of scroll wall 38b), and outer side surface 42c among both side surfaces defining the width of chip seal 42 is parallel to the outer wall surface of scroll wall 38b, but is positioned near the inner wall surface of scroll wall 36b of fixed scroll 36 as compared with this outer wall surface. Therefore, at the position in the lengthwise direction where scroll walls 36b, 38b are closest to each other, outer side surface 42c of chip seal 42 is in sliding contact with the inner wall surface of scroll wall 36b of fixed scroll 36. At this position in the lengthwise direction, a fine gap G is formed between the inner and outer wall surfaces of scroll walls 36b, 38b via chip seal 42.
  • Fig. 6 is a modification diagram for explaining the sliding contact positions between scroll walls 36b, 38b and outer side surface 42c of chip seal 42, and outer side surface 42c of chip seal 42 at movable scroll 38 side is in sliding contact with the inner wall surface of scroll wall 36b of fixed scroll 36 at two positions (points A, B).
  • outer side surface 42c of chip seal 42 at fixed scroll 36 side is in sliding contact with the inner wall surface of scroll wall 38b of movable scroll 38 at two positions (points C,D).
  • Fine gap G is formed between the inner and outer wall surfaces of scroll walls 36b, 38b at each of these points A, B, C, D in the lengthwise direction, and each of points A, B, C, D is positioned at each end of each pressure chamber 40 in the lengthwise direction of scroll walls 36b, 38b.
  • outer side surface 42c of each chip seal 42 is in sliding contact with the inner wall surface at a position near the root of each of scroll walls 36b, 38b.
  • the hatching is provided only to chip seal 42.
  • movable scroll 38 is connected to each end of drive shaft 20 via an orbital unit to enable the orbital movement of movable scroll 38.
  • an eccentric bush 50 is fixed to each end of drive shaft 20, and the eccentric bush 50 can be rotated integrally with drive shaft 20.
  • Eccentric bush 50 is surrounded by a boss provided integrally to the outer surface of end plate 38a, and between the eccentric bush 50 and the boss, ball bearing 52 is interposed.
  • a rotation preventing mechanism for preventing the rotation of movable scroll 38 around eccentric bush 50 is provided between end plate 38a of each movable scroll 38 and end wall 12b or end plate 14.
  • the rotation preventing mechanism includes, for example, a crank pin 54, and the crank pin 54 connects between end wall 12b or end plate 14 and end plate 38a via two ball bearings 56.
  • each high-pressure port 60 provided through the end wall of compression casing 30, namely, the central part of end plate 36a of fixed scroll 36, and pressure chamber 40 positioned at the central part of end plate 36a is connected to high-pressure region 2a of circulation passageway 2 via the high-pressure port 60.
  • the low-pressure port is provided through the circumferential wall of compression casing 30, and the inside of compression casing 30 is connected to low-pressure region 2b of circulation passageway 2 via the low-pressure port.
  • scroll fluid machine 1 in the above-described refrigeration circuit will be explained.
  • rotor 18, that is, drive shaft 20 is rotated by the power supply to stator 16, accompanied with the rotation of drive shaft 20, movable scroll 38 is served to an orbital movement via eccentric bush 50.
  • scroll unit 35 on the left side in Fig. 1 carries out the following compression process.
  • the left-side scroll unit 35 sucks low-pressure gas refrigerant from low-pressure region 2b of circulation passageway 2 into pressure chamber 40 positioned at the outer circumferential region through the low-pressure port and the space between scroll unit 35 and compression casing 30. Thereafter, the pressure chamber 40 having sucked the refrigerant moves toward the central portions of end plates 36a, 38a along scroll walls 36b, 38b, and during this movement, the refrigerant in the pressure chamber 40 is compressed by reduction of the volume of the pressure chamber 40. Then, the refrigerant compressed in the pressure chamber 40 flows out to high-pressure region 2a of circulation passageway 2 through high-pressure port 60 when the pressure chamber 40 is communicated with the high-pressure port 60 at the central portions of end plates 36a, 38a.
  • the high-pressure gas refrigerant flowed into high-pressure region 2a is cooled and condensed at condenser 4, and after becoming a high-pressure liquid refrigerant, bubbles and moisture are removed at receiver 6.
  • the high-pressure liquid refrigerant having passed through receiver 6 is supplied to the right-side scroll unit in Fig. 1, and this right-side scroll unit 35 carries out the following expansion process.
  • the high-pressure liquid refrigerant sent from high-pressure region 2a of circulation passageway 2 flows into pressure chamber 40 positioned at the central portions of end plates 36a, 38a through high-pressure port 60. Thereafter, the pressure chamber 40, into which the refrigerant has flowed, moves toward the outer circumferential portions of end plates 36a, 38a along scroll walls 36b, 38b, and during this movement, the refrigerant in the pressure chamber 40 is expanded by increase of the volume of the pressure chamber 40.
  • the refrigerant expanded in pressure chamber 40 flows into low-pressure region 2b of circulation passageway 2 through the space between scroll unit 35 and compression casing 30 and the low-pressure port at the outer circumferential region of scroll unit 35 when the pressure chamber 40 communicates with the space.
  • the gas/liquid mixed low-pressure refrigerant flowed out to low-pressure region 2b becomes low-pressure gas refrigerant, and thereafter, the refrigerant is sucked again into pressure chamber 40 of left side scroll unit 35.
  • a part of chip seal 42 (that is, a radial projection) is radially projected from the outer wall surface of scroll wall 36b, 38b, and fine gap G is secured between the inner and outer wall surfaces of scroll walls 36b, 38b, thereby relaxing the sliding contact conditions between scroll walls 36b, 38b. Consequently, the abrasion of scroll walls 36b, 38b can be suppressed in this scroll fluid machine 1.
  • this scroll fluid machine 1 since the abrasion of scroll walls 36b, 38b can be suppressed and the occurrence of galling between scroll walls 36b, 38b can be prevented by a part of chip seal 42 (radial projection), this scroll fluid machine 1 has an excellent durability. Besides, in this scroll fluid machine 1, because the fine gap G is secured between scroll walls 36b, 38b, even if lubricant oil is not mixed in the refrigerant, seizure does not occur between scroll walls 36b, 38b. Therefore, in a refrigeration circuit applied with this fluid machine 1, it is possible to make the refrigeration circuit oil-free, and in such a case, because a lubricant oil is not mixed in the refrigerant, the circuit has a good coefficient of performance. Moreover, because it is not necessary to mix a lubricant oil in the operational fluid, this fluid machine 1 can be applied to various uses.
  • scroll units 35 each functioning as a compressor or an expander are provided to both ends of the drive shaft, it is possible to save the consumption power. This is because the expansion of the refrigerant in pressure chamber 40 of right-side scroll unit 35 gives an auxiliary power to drive shaft 20 via the orbital movement of movable scroll 38, and by utilizing this auxiliary power, the refrigerant can be compressed in pressure chamber 40 of left-side scroll unit 35.
  • pins 42a are formed on chip seal 42 and pin holes 46a are formed on flat surface 46 as a holding means for holding chip seal 42 on scroll walls 36b, 38b
  • the pin holes may be formed on chip seal 42 and the pins may be formed on flat surface 46.
  • pins 42a are formed on chip seal 42 and pin holes 46a are formed on flat surface 46.
  • a projected strip may be formed instead of pins 42a, and as shown in Fig. 7, a groove 46b for fitting the projected strip thereinto may be formed instead of pin holes 46a.
  • the holding means may be provided between scroll walls 36b, 38b and chip seal 42 and may include a recessed portion and a projected portion being engaged with each other, and by such a holding means, chip seal 42 can be held by scroll walls 36b, 38b easily and securely.
  • the holding means may include an adhesive layer 70 as shown in Fig. 8, or the holding means may be formed only by adhesive layer 70.
  • a part of chip seal 42 is projected from the outer wall surface of scroll wall 36b or 38b in the aforementioned embodiment, a part of chip seal 42 may be projected from the inner wall surface of scroll wall 36b or 38b.
  • a chip seal 72 having a portion projected from the outer and inner wall surfaces of scroll wall 36b or 38b may be employed.
  • outer wall surface 72c and inner wall surface 72d of chip seal 72 is in sliding contact with the inner wall surface and outer wall surface of counter-side scroll wall 36b or 38b, and a fine gap G is secured at each sliding contact portion. Therefore, in this case, although chip seal 72 may be provided on both of fixed and movable scrolls 36, 38, chip seal 72 may be provided on one of fixed scroll 36 and movable scroll 38, and a conventional chip seal may be provided on the other scroll.
  • a radial projection 76 may be provided as a member separate from a conventional chip seal 74. In this case, by radial projection 76, a fine gap G can be secured between the inner and outer wall surfaces of scroll walls 36b, 38b.
  • chip seal 74 and radial projection 76 are formed separately from each other, because the number of parts increases and it is necessary to provide means for holding chip seal 74 and radial projection 76 on scroll walls 36b, 38b, respectively, thereby causing a reduction of productivity and an increase of cost of the fluid machine, a structure is preferred wherein a part of chip seal 42 is projected from the outer wall surface as in the aforementioned embodiment. In other words, it is preferred that radial projection 76 is formed integrally with chip seal 74.
  • seal surface 42b extends up to the projected portion in the width direction and an outer side surface 42c is connected perpendicularly to the side edge of the seal surface 42b.
  • chip seal 42 is made of one material selected from the group consisting of a polyphenylenesulfide group resin (PPS group resin), a polyetheretherketone group resin (PEEK group resin) and a polyimide group resin (PI group resin), because these resins are excellent in abrasion resistance, thereby further improving the durability of the fluid machine.
  • PPS group resin polyphenylenesulfide group resin
  • PEEK group resin polyetheretherketone group resin
  • PI group resin polyimide group resin
  • fluid machine 1 has two scroll units 35 provided on both end portions of drive shaft 20, the scroll fluid machine according to the present invention may have at least one scroll unit.
  • the scroll fluid machine according to the present invention can be applied to any fluid machine having a scroll unit, and in particular, it is suitable as a fluid machine used for a refrigeration circuit in an air conditioning system for vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rotary Pumps (AREA)
EP06731149.8A 2005-04-14 2006-04-05 Machine a fluide avec volute Expired - Fee Related EP1876356B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005116985A JP2006291925A (ja) 2005-04-14 2005-04-14 スクロール型流体機械
PCT/JP2006/307201 WO2006112262A1 (fr) 2005-04-14 2006-04-05 Machine a fluide avec volute

Publications (3)

Publication Number Publication Date
EP1876356A1 true EP1876356A1 (fr) 2008-01-09
EP1876356A4 EP1876356A4 (fr) 2008-04-02
EP1876356B1 EP1876356B1 (fr) 2013-06-26

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Application Number Title Priority Date Filing Date
EP06731149.8A Expired - Fee Related EP1876356B1 (fr) 2005-04-14 2006-04-05 Machine a fluide avec volute

Country Status (5)

Country Link
US (1) US20090060768A1 (fr)
EP (1) EP1876356B1 (fr)
JP (1) JP2006291925A (fr)
CN (1) CN101160466A (fr)
WO (1) WO2006112262A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
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WO2011018598A3 (fr) * 2009-08-14 2011-09-15 Edwards Limited Pompe à spirales
DE102010025988A1 (de) * 2010-07-02 2012-01-26 Handtmann Systemtechnik Gmbh & Co. Kg Ladevorrichtung zur Verdichtung von Ladeluft
EP2466068A1 (fr) * 2009-08-12 2012-06-20 Sanden Corporation Machine de fluide en spirale
US9353746B2 (en) 2009-08-14 2016-05-31 Edwards Limited Scroll pump
US9938975B2 (en) 2011-03-29 2018-04-10 Edwards Limited Scroll compressor including seal with axial length that is greater than radial width
US11646624B2 (en) 2019-03-28 2023-05-09 Kabushiki Kaisha Toyota Jidoshokki Electric compressor

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6021373B2 (ja) 2012-03-23 2016-11-09 三菱重工業株式会社 スクロール圧縮機およびそのスクロールの加工方法
IN2015MN00117A (fr) 2012-07-23 2015-10-16 Emerson Climate Technologies
BR112015001500A2 (pt) 2012-07-23 2017-07-04 Emerson Climate Technologies revestimentos antidesgaste para superfícies de desgaste do compressor
JP6125216B2 (ja) * 2012-12-14 2017-05-10 サンデンホールディングス株式会社 スクロール型流体機械
JP6587827B2 (ja) * 2015-05-15 2019-10-09 サンデンホールディングス株式会社 流体機械
WO2019043741A1 (fr) * 2017-08-28 2019-03-07 三菱電機株式会社 Compresseur

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EP2466068A1 (fr) * 2009-08-12 2012-06-20 Sanden Corporation Machine de fluide en spirale
EP2466068A4 (fr) * 2009-08-12 2013-11-13 Sanden Corp Machine de fluide en spirale
WO2011018598A3 (fr) * 2009-08-14 2011-09-15 Edwards Limited Pompe à spirales
GB2485101A (en) * 2009-08-14 2012-05-02 Charles Robert Clark Scroll pump
GB2485101B (en) * 2009-08-14 2015-10-14 Charles Robert Clark Scroll pump
US9353746B2 (en) 2009-08-14 2016-05-31 Edwards Limited Scroll pump
US9353748B2 (en) 2009-08-14 2016-05-31 Edwards Limited Scroll pump having tip seal containing engaging portions intermediate nonengaging portions that interface with a scroll base
DE102010025988A1 (de) * 2010-07-02 2012-01-26 Handtmann Systemtechnik Gmbh & Co. Kg Ladevorrichtung zur Verdichtung von Ladeluft
EP2402612A3 (fr) * 2010-07-02 2015-03-11 Handtmann Systemtechnik GmbH & Co. KG Dispositif d'étanchéité pour les extrémités des spirales d'un compresseur à spirales
US9938975B2 (en) 2011-03-29 2018-04-10 Edwards Limited Scroll compressor including seal with axial length that is greater than radial width
US11646624B2 (en) 2019-03-28 2023-05-09 Kabushiki Kaisha Toyota Jidoshokki Electric compressor

Also Published As

Publication number Publication date
EP1876356B1 (fr) 2013-06-26
JP2006291925A (ja) 2006-10-26
WO2006112262A1 (fr) 2006-10-26
US20090060768A1 (en) 2009-03-05
CN101160466A (zh) 2008-04-09
EP1876356A4 (fr) 2008-04-02

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